5693 lines
155 KiB
C
5693 lines
155 KiB
C
/* Remote target communications for serial-line targets in custom GDB protocol
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Copyright 1988, 1991-2000 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* See the GDB User Guide for details of the GDB remote protocol. */
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#include "defs.h"
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#include "gdb_string.h"
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#include <ctype.h>
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#include <fcntl.h>
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#include "frame.h"
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#include "inferior.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "target.h"
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#include "gdb_wait.h"
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/*#include "terminal.h" */
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#include "gdbcmd.h"
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#include "objfiles.h"
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#include "gdb-stabs.h"
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#include "gdbthread.h"
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#include "remote.h"
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#include <ctype.h>
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#include <sys/time.h>
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#ifdef USG
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#include <sys/types.h>
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#endif
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#include "event-loop.h"
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#include "event-top.h"
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#include "inf-loop.h"
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#include <signal.h>
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#include "serial.h"
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/* Prototypes for local functions */
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static void cleanup_sigint_signal_handler (void *dummy);
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static void initialize_sigint_signal_handler (void);
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static int getpkt_sane (char *buf, long sizeof_buf, int forever);
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static void handle_remote_sigint (int);
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static void handle_remote_sigint_twice (int);
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||
static void async_remote_interrupt (gdb_client_data);
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void async_remote_interrupt_twice (gdb_client_data);
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static void build_remote_gdbarch_data (void);
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static int remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len);
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static int remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len);
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static void remote_files_info (struct target_ops *ignore);
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static int remote_xfer_memory (CORE_ADDR memaddr, char *myaddr,
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int len, int should_write,
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struct target_ops *target);
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static void remote_prepare_to_store (void);
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static void remote_fetch_registers (int regno);
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static void remote_resume (int pid, int step, enum target_signal siggnal);
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static void remote_async_resume (int pid, int step,
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enum target_signal siggnal);
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static int remote_start_remote (PTR);
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static void remote_open (char *name, int from_tty);
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static void remote_async_open (char *name, int from_tty);
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static void extended_remote_open (char *name, int from_tty);
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static void extended_remote_async_open (char *name, int from_tty);
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static void remote_open_1 (char *, int, struct target_ops *, int extended_p);
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static void remote_async_open_1 (char *, int, struct target_ops *,
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int extended_p);
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static void remote_close (int quitting);
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static void remote_store_registers (int regno);
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static void remote_mourn (void);
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static void remote_async_mourn (void);
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static void extended_remote_restart (void);
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static void extended_remote_mourn (void);
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static void extended_remote_create_inferior (char *, char *, char **);
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static void extended_remote_async_create_inferior (char *, char *, char **);
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static void remote_mourn_1 (struct target_ops *);
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static void remote_send (char *buf, long sizeof_buf);
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static int readchar (int timeout);
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static int remote_wait (int pid, struct target_waitstatus *status);
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static int remote_async_wait (int pid, struct target_waitstatus *status);
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static void remote_kill (void);
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static void remote_async_kill (void);
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static int tohex (int nib);
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static void remote_detach (char *args, int from_tty);
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static void remote_async_detach (char *args, int from_tty);
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static void remote_interrupt (int signo);
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static void remote_interrupt_twice (int signo);
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static void interrupt_query (void);
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static void set_thread (int, int);
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static int remote_thread_alive (int);
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static void get_offsets (void);
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static long read_frame (char *buf, long sizeof_buf);
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static int remote_insert_breakpoint (CORE_ADDR, char *);
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static int remote_remove_breakpoint (CORE_ADDR, char *);
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static int hexnumlen (ULONGEST num);
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static void init_remote_ops (void);
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static void init_extended_remote_ops (void);
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static void init_remote_cisco_ops (void);
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static struct target_ops remote_cisco_ops;
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static void remote_stop (void);
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static int ishex (int ch, int *val);
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static int stubhex (int ch);
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static int remote_query (int /*char */ , char *, char *, int *);
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static int hexnumstr (char *, ULONGEST);
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static int hexnumnstr (char *, ULONGEST, int);
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static CORE_ADDR remote_address_masked (CORE_ADDR);
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static void print_packet (char *);
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static unsigned long crc32 (unsigned char *, int, unsigned int);
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static void compare_sections_command (char *, int);
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static void packet_command (char *, int);
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static int stub_unpack_int (char *buff, int fieldlength);
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static int remote_current_thread (int oldpid);
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static void remote_find_new_threads (void);
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static void record_currthread (int currthread);
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/* exported functions */
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extern int fromhex (int a);
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static int putpkt_binary (char *buf, int cnt);
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static void check_binary_download (CORE_ADDR addr);
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struct packet_config;
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static void show_packet_config_cmd (struct packet_config *config);
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static void update_packet_config (struct packet_config *config);
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/* Define the target subroutine names */
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void open_remote_target (char *, int, struct target_ops *, int);
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void _initialize_remote (void);
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/* */
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static struct target_ops remote_ops;
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static struct target_ops extended_remote_ops;
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/* Temporary target ops. Just like the remote_ops and
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extended_remote_ops, but with asynchronous support. */
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static struct target_ops remote_async_ops;
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static struct target_ops extended_async_remote_ops;
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/* FIXME: cagney/1999-09-23: Even though getpkt was called with
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``forever'' still use the normal timeout mechanism. This is
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currently used by the ASYNC code to guarentee that target reads
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during the initial connect always time-out. Once getpkt has been
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modified to return a timeout indication and, in turn
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remote_wait()/wait_for_inferior() have gained a timeout parameter
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this can go away. */
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static int wait_forever_enabled_p = 1;
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/* This variable chooses whether to send a ^C or a break when the user
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requests program interruption. Although ^C is usually what remote
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systems expect, and that is the default here, sometimes a break is
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preferable instead. */
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static int remote_break;
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/* Descriptor for I/O to remote machine. Initialize it to NULL so that
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remote_open knows that we don't have a file open when the program
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starts. */
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static serial_t remote_desc = NULL;
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/* This is set by the target (thru the 'S' message)
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to denote that the target is in kernel mode. */
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static int cisco_kernel_mode = 0;
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/* This variable sets the number of bits in an address that are to be
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sent in a memory ("M" or "m") packet. Normally, after stripping
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leading zeros, the entire address would be sent. This variable
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restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
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initial implementation of remote.c restricted the address sent in
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memory packets to ``host::sizeof long'' bytes - (typically 32
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bits). Consequently, for 64 bit targets, the upper 32 bits of an
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address was never sent. Since fixing this bug may cause a break in
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some remote targets this variable is principly provided to
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facilitate backward compatibility. */
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static int remote_address_size;
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/* Tempoary to track who currently owns the terminal. See
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target_async_terminal_* for more details. */
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static int remote_async_terminal_ours_p;
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/* This is the size (in chars) of the first response to the ``g''
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packet. It is used as a heuristic when determining the maximum
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size of memory-read and memory-write packets. A target will
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typically only reserve a buffer large enough to hold the ``g''
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packet. The size does not include packet overhead (headers and
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trailers). */
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static long actual_register_packet_size;
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/* This is the maximum size (in chars) of a non read/write packet. It
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is also used as a cap on the size of read/write packets. */
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static long remote_packet_size;
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/* compatibility. */
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#define PBUFSIZ (remote_packet_size)
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/* User configurable variables for the number of characters in a
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memory read/write packet. MIN (PBUFSIZ, g-packet-size) is the
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default. Some targets need smaller values (fifo overruns, et.al.)
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and some users need larger values (speed up transfers). The
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variables ``preferred_*'' (the user request), ``current_*'' (what
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was actually set) and ``forced_*'' (Positive - a soft limit,
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negative - a hard limit). */
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struct memory_packet_config
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{
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char *name;
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long size;
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int fixed_p;
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};
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/* Compute the current size of a read/write packet. Since this makes
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use of ``actual_register_packet_size'' the computation is dynamic. */
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static long
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get_memory_packet_size (struct memory_packet_config *config)
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{
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/* NOTE: The somewhat arbitrary 16k comes from the knowledge (folk
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law?) that some hosts don't cope very well with large alloca()
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calls. Eventually the alloca() code will be replaced by calls to
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xmalloc() and make_cleanups() allowing this restriction to either
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be lifted or removed. */
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#ifndef MAX_REMOTE_PACKET_SIZE
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#define MAX_REMOTE_PACKET_SIZE 16384
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#endif
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/* NOTE: 16 is just chosen at random. */
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#ifndef MIN_REMOTE_PACKET_SIZE
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#define MIN_REMOTE_PACKET_SIZE 16
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#endif
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long what_they_get;
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if (config->fixed_p)
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{
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if (config->size <= 0)
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what_they_get = MAX_REMOTE_PACKET_SIZE;
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else
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what_they_get = config->size;
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}
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else
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{
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what_they_get = remote_packet_size;
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/* Limit the packet to the size specified by the user. */
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if (config->size > 0
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&& what_they_get > config->size)
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what_they_get = config->size;
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/* Limit it to the size of the targets ``g'' response. */
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if (actual_register_packet_size > 0
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&& what_they_get > actual_register_packet_size)
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what_they_get = actual_register_packet_size;
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}
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if (what_they_get > MAX_REMOTE_PACKET_SIZE)
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what_they_get = MAX_REMOTE_PACKET_SIZE;
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if (what_they_get < MIN_REMOTE_PACKET_SIZE)
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what_they_get = MIN_REMOTE_PACKET_SIZE;
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return what_they_get;
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}
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/* Update the size of a read/write packet. If they user wants
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something really big then do a sanity check. */
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static void
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set_memory_packet_size (char *args, struct memory_packet_config *config)
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{
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int fixed_p = config->fixed_p;
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long size = config->size;
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if (args == NULL)
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error ("Argument required (integer, `fixed' or `limited').");
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else if (strcmp (args, "hard") == 0
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|| strcmp (args, "fixed") == 0)
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fixed_p = 1;
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else if (strcmp (args, "soft") == 0
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|| strcmp (args, "limit") == 0)
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fixed_p = 0;
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else
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{
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char *end;
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size = strtoul (args, &end, 0);
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if (args == end)
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error ("Invalid %s (bad syntax).", config->name);
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#if 0
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/* Instead of explicitly capping the size of a packet to
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MAX_REMOTE_PACKET_SIZE or dissallowing it, the user is
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instead allowed to set the size to something arbitrarily
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large. */
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if (size > MAX_REMOTE_PACKET_SIZE)
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error ("Invalid %s (too large).", config->name);
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#endif
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}
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/* Extra checks? */
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if (fixed_p && !config->fixed_p)
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{
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if (! query ("The target may not be able to correctly handle a %s\n"
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"of %ld bytes. Change the packet size? ",
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config->name, size))
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error ("Packet size not changed.");
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}
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/* Update the config. */
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config->fixed_p = fixed_p;
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config->size = size;
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}
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static void
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show_memory_packet_size (struct memory_packet_config *config)
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{
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printf_filtered ("The %s is %ld. ", config->name, config->size);
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if (config->fixed_p)
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printf_filtered ("Packets are fixed at %ld bytes.\n",
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get_memory_packet_size (config));
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else
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printf_filtered ("Packets are limited to %ld bytes.\n",
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get_memory_packet_size (config));
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}
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static struct memory_packet_config memory_write_packet_config =
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{
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"memory-write-packet-size",
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};
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static void
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set_memory_write_packet_size (char *args, int from_tty)
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{
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set_memory_packet_size (args, &memory_write_packet_config);
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}
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static void
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show_memory_write_packet_size (char *args, int from_tty)
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{
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show_memory_packet_size (&memory_write_packet_config);
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}
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static long
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get_memory_write_packet_size (void)
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{
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return get_memory_packet_size (&memory_write_packet_config);
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}
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static struct memory_packet_config memory_read_packet_config =
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{
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"memory-read-packet-size",
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};
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static void
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set_memory_read_packet_size (char *args, int from_tty)
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{
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set_memory_packet_size (args, &memory_read_packet_config);
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}
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static void
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show_memory_read_packet_size (char *args, int from_tty)
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||
{
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show_memory_packet_size (&memory_read_packet_config);
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}
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||
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||
static long
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||
get_memory_read_packet_size (void)
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||
{
|
||
long size = get_memory_packet_size (&memory_read_packet_config);
|
||
/* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
|
||
extra buffer size argument before the memory read size can be
|
||
increased beyond PBUFSIZ. */
|
||
if (size > PBUFSIZ)
|
||
size = PBUFSIZ;
|
||
return size;
|
||
}
|
||
|
||
/* Register packet size initialization. Since the bounds change when
|
||
the architecture changes (namely REGISTER_BYTES) this all needs to
|
||
be multi-arched. */
|
||
|
||
static void
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||
register_remote_packet_sizes (void)
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||
{
|
||
REGISTER_GDBARCH_SWAP (remote_packet_size);
|
||
REGISTER_GDBARCH_SWAP (actual_register_packet_size);
|
||
}
|
||
|
||
static void
|
||
build_remote_packet_sizes (void)
|
||
{
|
||
/* Default maximum number of characters in a packet body. Many
|
||
remote stubs have a hardwired buffer size of 400 bytes
|
||
(c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
|
||
as the maximum packet-size to ensure that the packet and an extra
|
||
NUL character can always fit in the buffer. This stops GDB
|
||
trashing stubs that try to squeeze an extra NUL into what is
|
||
already a full buffer (As of 1999-12-04 that was most stubs. */
|
||
remote_packet_size = 400 - 1;
|
||
/* Should REGISTER_BYTES needs more space than the default, adjust
|
||
the size accordingly. Remember that each byte is encoded as two
|
||
characters. 32 is the overhead for the packet header /
|
||
footer. NOTE: cagney/1999-10-26: I suspect that 8
|
||
(``$NN:G...#NN'') is a better guess, the below has been padded a
|
||
little. */
|
||
if (REGISTER_BYTES > ((remote_packet_size - 32) / 2))
|
||
remote_packet_size = (REGISTER_BYTES * 2 + 32);
|
||
|
||
/* This one is filled in when a ``g'' packet is received. */
|
||
actual_register_packet_size = 0;
|
||
}
|
||
|
||
/* Generic configuration support for packets the stub optionally
|
||
supports. Allows the user to specify the use of the packet as well
|
||
as allowing GDB to auto-detect support in the remote stub. */
|
||
|
||
enum packet_support
|
||
{
|
||
PACKET_SUPPORT_UNKNOWN = 0,
|
||
PACKET_ENABLE,
|
||
PACKET_DISABLE
|
||
};
|
||
|
||
struct packet_config
|
||
{
|
||
char *name;
|
||
char *title;
|
||
enum cmd_auto_boolean detect;
|
||
enum packet_support support;
|
||
};
|
||
|
||
/* Analyze a packet's return value and update the packet config
|
||
accordingly. */
|
||
|
||
enum packet_result
|
||
{
|
||
PACKET_ERROR,
|
||
PACKET_OK,
|
||
PACKET_UNKNOWN
|
||
};
|
||
|
||
static void
|
||
update_packet_config (struct packet_config *config)
|
||
{
|
||
switch (config->detect)
|
||
{
|
||
case CMD_AUTO_BOOLEAN_TRUE:
|
||
config->support = PACKET_ENABLE;
|
||
break;
|
||
case CMD_AUTO_BOOLEAN_FALSE:
|
||
config->support = PACKET_DISABLE;
|
||
break;
|
||
case CMD_AUTO_BOOLEAN_AUTO:
|
||
config->support = PACKET_SUPPORT_UNKNOWN;
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
show_packet_config_cmd (struct packet_config *config)
|
||
{
|
||
char *support = "internal-error";
|
||
switch (config->support)
|
||
{
|
||
case PACKET_ENABLE:
|
||
support = "enabled";
|
||
break;
|
||
case PACKET_DISABLE:
|
||
support = "disabled";
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
support = "unknown";
|
||
break;
|
||
}
|
||
switch (config->detect)
|
||
{
|
||
case CMD_AUTO_BOOLEAN_AUTO:
|
||
printf_filtered ("Support for remote protocol `%s' (%s) packet is auto-detected, currently %s.\n",
|
||
config->name, config->title, support);
|
||
break;
|
||
case CMD_AUTO_BOOLEAN_TRUE:
|
||
case CMD_AUTO_BOOLEAN_FALSE:
|
||
printf_filtered ("Support for remote protocol `%s' (%s) packet is currently %s.\n",
|
||
config->name, config->title, support);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
add_packet_config_cmd (struct packet_config *config,
|
||
char *name,
|
||
char *title,
|
||
void (*set_func) (char *args, int from_tty,
|
||
struct cmd_list_element *
|
||
c),
|
||
void (*show_func) (char *name,
|
||
int from_tty),
|
||
struct cmd_list_element **set_remote_list,
|
||
struct cmd_list_element **show_remote_list,
|
||
int legacy)
|
||
{
|
||
struct cmd_list_element *set_cmd;
|
||
struct cmd_list_element *show_cmd;
|
||
char *set_doc;
|
||
char *show_doc;
|
||
char *cmd_name;
|
||
config->name = name;
|
||
config->title = title;
|
||
config->detect = CMD_AUTO_BOOLEAN_AUTO;
|
||
config->support = PACKET_SUPPORT_UNKNOWN;
|
||
xasprintf (&set_doc, "Set use of remote protocol `%s' (%s) packet",
|
||
name, title);
|
||
xasprintf (&show_doc, "Show current use of remote protocol `%s' (%s) packet",
|
||
name, title);
|
||
/* set/show TITLE-packet {auto,on,off} */
|
||
xasprintf (&cmd_name, "%s-packet", title);
|
||
set_cmd = add_set_auto_boolean_cmd (cmd_name, class_obscure,
|
||
&config->detect, set_doc,
|
||
set_remote_list);
|
||
set_cmd->function.sfunc = set_func;
|
||
show_cmd = add_cmd (cmd_name, class_obscure, show_func, show_doc,
|
||
show_remote_list);
|
||
/* set/show remote NAME-packet {auto,on,off} -- legacy */
|
||
if (legacy)
|
||
{
|
||
char *legacy_name;
|
||
xasprintf (&legacy_name, "%s-packet", name);
|
||
add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
|
||
set_remote_list);
|
||
add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
|
||
show_remote_list);
|
||
}
|
||
}
|
||
|
||
static enum packet_result
|
||
packet_ok (const char *buf, struct packet_config *config)
|
||
{
|
||
if (buf[0] != '\0')
|
||
{
|
||
/* The stub recognized the packet request. Check that the
|
||
operation succeeded. */
|
||
switch (config->support)
|
||
{
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Packet %s (%s) is supported\n",
|
||
config->name, config->title);
|
||
config->support = PACKET_ENABLE;
|
||
break;
|
||
case PACKET_DISABLE:
|
||
internal_error ("packet_ok: attempt to use a disabled packet");
|
||
break;
|
||
case PACKET_ENABLE:
|
||
break;
|
||
}
|
||
if (buf[0] == 'O' && buf[1] == 'K' && buf[2] == '\0')
|
||
/* "OK" - definitly OK. */
|
||
return PACKET_OK;
|
||
if (buf[0] == 'E'
|
||
&& isxdigit (buf[1]) && isxdigit (buf[2])
|
||
&& buf[3] == '\0')
|
||
/* "Enn" - definitly an error. */
|
||
return PACKET_ERROR;
|
||
/* The packet may or may not be OK. Just assume it is */
|
||
return PACKET_OK;
|
||
}
|
||
else
|
||
{
|
||
/* The stub does not support the packet. */
|
||
switch (config->support)
|
||
{
|
||
case PACKET_ENABLE:
|
||
if (config->detect == CMD_AUTO_BOOLEAN_AUTO)
|
||
/* If the stub previously indicated that the packet was
|
||
supported then there is a protocol error.. */
|
||
error ("Protocol error: %s (%s) conflicting enabled responses.",
|
||
config->name, config->title);
|
||
else
|
||
/* The user set it wrong. */
|
||
error ("Enabled packet %s (%s) not recognized by stub",
|
||
config->name, config->title);
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Packet %s (%s) is NOT supported\n",
|
||
config->name, config->title);
|
||
config->support = PACKET_DISABLE;
|
||
break;
|
||
case PACKET_DISABLE:
|
||
break;
|
||
}
|
||
return PACKET_UNKNOWN;
|
||
}
|
||
}
|
||
|
||
/* Should we try the 'P' (set register) request? */
|
||
|
||
static struct packet_config remote_protocol_P;
|
||
|
||
static void
|
||
set_remote_protocol_P_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
update_packet_config (&remote_protocol_P);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_P_packet_cmd (char *args, int from_tty)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_P);
|
||
}
|
||
|
||
/* Should we try one of the 'Z' requests? */
|
||
|
||
enum Z_packet_type
|
||
{
|
||
Z_PACKET_SOFTWARE_BP,
|
||
Z_PACKET_HARDWARE_BP,
|
||
Z_PACKET_WRITE_WP,
|
||
Z_PACKET_READ_WP,
|
||
Z_PACKET_ACCESS_WP,
|
||
NR_Z_PACKET_TYPES
|
||
};
|
||
|
||
static struct packet_config remote_protocol_Z[NR_Z_PACKET_TYPES];
|
||
|
||
/* FIXME: Instead of having all these boiler plate functions, the
|
||
command callback should include a context argument. */
|
||
|
||
static void
|
||
set_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
update_packet_config (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_Z_software_bp_packet_cmd (char *args, int from_tty)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP]);
|
||
}
|
||
|
||
static void
|
||
set_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
update_packet_config (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_Z_hardware_bp_packet_cmd (char *args, int from_tty)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP]);
|
||
}
|
||
|
||
static void
|
||
set_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
update_packet_config (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_Z_write_wp_packet_cmd (char *args, int from_tty)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP]);
|
||
}
|
||
|
||
static void
|
||
set_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
update_packet_config (&remote_protocol_Z[Z_PACKET_READ_WP]);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_Z_read_wp_packet_cmd (char *args, int from_tty)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP]);
|
||
}
|
||
|
||
static void
|
||
set_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
update_packet_config (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_Z_access_wp_packet_cmd (char *args, int from_tty)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP]);
|
||
}
|
||
|
||
/* For compatibility with older distributions. Provide a ``set remote
|
||
Z-packet ...'' command that updates all the Z packet types. */
|
||
|
||
static enum cmd_auto_boolean remote_Z_packet_detect;
|
||
|
||
static void
|
||
set_remote_protocol_Z_packet_cmd (char *args, int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
int i;
|
||
for (i = 0; i < NR_Z_PACKET_TYPES; i++)
|
||
{
|
||
remote_protocol_Z[i].detect = remote_Z_packet_detect;
|
||
update_packet_config (&remote_protocol_Z[i]);
|
||
}
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_Z_packet_cmd (char *args, int from_tty)
|
||
{
|
||
int i;
|
||
for (i = 0; i < NR_Z_PACKET_TYPES; i++)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_Z[i]);
|
||
}
|
||
}
|
||
|
||
/* Should we try the 'X' (remote binary download) packet?
|
||
|
||
This variable (available to the user via "set remote X-packet")
|
||
dictates whether downloads are sent in binary (via the 'X' packet).
|
||
We assume that the stub can, and attempt to do it. This will be
|
||
cleared if the stub does not understand it. This switch is still
|
||
needed, though in cases when the packet is supported in the stub,
|
||
but the connection does not allow it (i.e., 7-bit serial connection
|
||
only). */
|
||
|
||
static struct packet_config remote_protocol_binary_download;
|
||
|
||
/* Should we try the 'ThreadInfo' query packet?
|
||
|
||
This variable (NOT available to the user: auto-detect only!)
|
||
determines whether GDB will use the new, simpler "ThreadInfo"
|
||
query or the older, more complex syntax for thread queries.
|
||
This is an auto-detect variable (set to true at each connect,
|
||
and set to false when the target fails to recognize it). */
|
||
|
||
static int use_threadinfo_query;
|
||
static int use_threadextra_query;
|
||
|
||
static void
|
||
set_remote_protocol_binary_download_cmd (char *args,
|
||
int from_tty,
|
||
struct cmd_list_element *c)
|
||
{
|
||
update_packet_config (&remote_protocol_binary_download);
|
||
}
|
||
|
||
static void
|
||
show_remote_protocol_binary_download_cmd (char *args,
|
||
int from_tty)
|
||
{
|
||
show_packet_config_cmd (&remote_protocol_binary_download);
|
||
}
|
||
|
||
|
||
/* Tokens for use by the asynchronous signal handlers for SIGINT */
|
||
PTR sigint_remote_twice_token;
|
||
PTR sigint_remote_token;
|
||
|
||
/* These are pointers to hook functions that may be set in order to
|
||
modify resume/wait behavior for a particular architecture. */
|
||
|
||
void (*target_resume_hook) (void);
|
||
void (*target_wait_loop_hook) (void);
|
||
|
||
|
||
|
||
/* These are the threads which we last sent to the remote system.
|
||
-1 for all or -2 for not sent yet. */
|
||
static int general_thread;
|
||
static int continue_thread;
|
||
|
||
/* Call this function as a result of
|
||
1) A halt indication (T packet) containing a thread id
|
||
2) A direct query of currthread
|
||
3) Successful execution of set thread
|
||
*/
|
||
|
||
static void
|
||
record_currthread (int currthread)
|
||
{
|
||
general_thread = currthread;
|
||
|
||
/* If this is a new thread, add it to GDB's thread list.
|
||
If we leave it up to WFI to do this, bad things will happen. */
|
||
if (!in_thread_list (currthread))
|
||
{
|
||
add_thread (currthread);
|
||
#ifdef UI_OUT
|
||
ui_out_text (uiout, "[New ");
|
||
ui_out_text (uiout, target_pid_to_str (currthread));
|
||
ui_out_text (uiout, "]\n");
|
||
#else
|
||
printf_filtered ("[New %s]\n", target_pid_to_str (currthread));
|
||
#endif
|
||
}
|
||
}
|
||
|
||
#define MAGIC_NULL_PID 42000
|
||
|
||
static void
|
||
set_thread (int th, int gen)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
int state = gen ? general_thread : continue_thread;
|
||
|
||
if (state == th)
|
||
return;
|
||
|
||
buf[0] = 'H';
|
||
buf[1] = gen ? 'g' : 'c';
|
||
if (th == MAGIC_NULL_PID)
|
||
{
|
||
buf[2] = '0';
|
||
buf[3] = '\0';
|
||
}
|
||
else if (th < 0)
|
||
sprintf (&buf[2], "-%x", -th);
|
||
else
|
||
sprintf (&buf[2], "%x", th);
|
||
putpkt (buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
if (gen)
|
||
general_thread = th;
|
||
else
|
||
continue_thread = th;
|
||
}
|
||
|
||
/* Return nonzero if the thread TH is still alive on the remote system. */
|
||
|
||
static int
|
||
remote_thread_alive (int tid)
|
||
{
|
||
char buf[16];
|
||
|
||
if (tid < 0)
|
||
sprintf (buf, "T-%08x", -tid);
|
||
else
|
||
sprintf (buf, "T%08x", tid);
|
||
putpkt (buf);
|
||
getpkt (buf, sizeof (buf), 0);
|
||
return (buf[0] == 'O' && buf[1] == 'K');
|
||
}
|
||
|
||
/* About these extended threadlist and threadinfo packets. They are
|
||
variable length packets but, the fields within them are often fixed
|
||
length. They are redundent enough to send over UDP as is the
|
||
remote protocol in general. There is a matching unit test module
|
||
in libstub. */
|
||
|
||
#define OPAQUETHREADBYTES 8
|
||
|
||
/* a 64 bit opaque identifier */
|
||
typedef unsigned char threadref[OPAQUETHREADBYTES];
|
||
|
||
/* WARNING: This threadref data structure comes from the remote O.S., libstub
|
||
protocol encoding, and remote.c. it is not particularly changable */
|
||
|
||
/* Right now, the internal structure is int. We want it to be bigger.
|
||
Plan to fix this.
|
||
*/
|
||
|
||
typedef int gdb_threadref; /* internal GDB thread reference */
|
||
|
||
/* gdb_ext_thread_info is an internal GDB data structure which is
|
||
equivalint to the reply of the remote threadinfo packet */
|
||
|
||
struct gdb_ext_thread_info
|
||
{
|
||
threadref threadid; /* External form of thread reference */
|
||
int active; /* Has state interesting to GDB? , regs, stack */
|
||
char display[256]; /* Brief state display, name, blocked/syspended */
|
||
char shortname[32]; /* To be used to name threads */
|
||
char more_display[256]; /* Long info, statistics, queue depth, whatever */
|
||
};
|
||
|
||
/* The volume of remote transfers can be limited by submitting
|
||
a mask containing bits specifying the desired information.
|
||
Use a union of these values as the 'selection' parameter to
|
||
get_thread_info. FIXME: Make these TAG names more thread specific.
|
||
*/
|
||
|
||
#define TAG_THREADID 1
|
||
#define TAG_EXISTS 2
|
||
#define TAG_DISPLAY 4
|
||
#define TAG_THREADNAME 8
|
||
#define TAG_MOREDISPLAY 16
|
||
|
||
#define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES*2)
|
||
|
||
char *unpack_varlen_hex (char *buff, int *result);
|
||
|
||
static char *unpack_nibble (char *buf, int *val);
|
||
|
||
static char *pack_nibble (char *buf, int nibble);
|
||
|
||
static char *pack_hex_byte (char *pkt, int /*unsigned char */ byte);
|
||
|
||
static char *unpack_byte (char *buf, int *value);
|
||
|
||
static char *pack_int (char *buf, int value);
|
||
|
||
static char *unpack_int (char *buf, int *value);
|
||
|
||
static char *unpack_string (char *src, char *dest, int length);
|
||
|
||
static char *pack_threadid (char *pkt, threadref * id);
|
||
|
||
static char *unpack_threadid (char *inbuf, threadref * id);
|
||
|
||
void int_to_threadref (threadref * id, int value);
|
||
|
||
static int threadref_to_int (threadref * ref);
|
||
|
||
static void copy_threadref (threadref * dest, threadref * src);
|
||
|
||
static int threadmatch (threadref * dest, threadref * src);
|
||
|
||
static char *pack_threadinfo_request (char *pkt, int mode, threadref * id);
|
||
|
||
static int remote_unpack_thread_info_response (char *pkt,
|
||
threadref * expectedref,
|
||
struct gdb_ext_thread_info
|
||
*info);
|
||
|
||
|
||
static int remote_get_threadinfo (threadref * threadid, int fieldset, /*TAG mask */
|
||
struct gdb_ext_thread_info *info);
|
||
|
||
static int adapt_remote_get_threadinfo (gdb_threadref * ref,
|
||
int selection,
|
||
struct gdb_ext_thread_info *info);
|
||
|
||
static char *pack_threadlist_request (char *pkt, int startflag,
|
||
int threadcount,
|
||
threadref * nextthread);
|
||
|
||
static int parse_threadlist_response (char *pkt,
|
||
int result_limit,
|
||
threadref * original_echo,
|
||
threadref * resultlist, int *doneflag);
|
||
|
||
static int remote_get_threadlist (int startflag,
|
||
threadref * nextthread,
|
||
int result_limit,
|
||
int *done,
|
||
int *result_count, threadref * threadlist);
|
||
|
||
typedef int (*rmt_thread_action) (threadref * ref, void *context);
|
||
|
||
static int remote_threadlist_iterator (rmt_thread_action stepfunction,
|
||
void *context, int looplimit);
|
||
|
||
static int remote_newthread_step (threadref * ref, void *context);
|
||
|
||
/* encode 64 bits in 16 chars of hex */
|
||
|
||
static const char hexchars[] = "0123456789abcdef";
|
||
|
||
static int
|
||
ishex (int ch, int *val)
|
||
{
|
||
if ((ch >= 'a') && (ch <= 'f'))
|
||
{
|
||
*val = ch - 'a' + 10;
|
||
return 1;
|
||
}
|
||
if ((ch >= 'A') && (ch <= 'F'))
|
||
{
|
||
*val = ch - 'A' + 10;
|
||
return 1;
|
||
}
|
||
if ((ch >= '0') && (ch <= '9'))
|
||
{
|
||
*val = ch - '0';
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
stubhex (int ch)
|
||
{
|
||
if (ch >= 'a' && ch <= 'f')
|
||
return ch - 'a' + 10;
|
||
if (ch >= '0' && ch <= '9')
|
||
return ch - '0';
|
||
if (ch >= 'A' && ch <= 'F')
|
||
return ch - 'A' + 10;
|
||
return -1;
|
||
}
|
||
|
||
static int
|
||
stub_unpack_int (char *buff, int fieldlength)
|
||
{
|
||
int nibble;
|
||
int retval = 0;
|
||
|
||
while (fieldlength)
|
||
{
|
||
nibble = stubhex (*buff++);
|
||
retval |= nibble;
|
||
fieldlength--;
|
||
if (fieldlength)
|
||
retval = retval << 4;
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
char *
|
||
unpack_varlen_hex (char *buff, /* packet to parse */
|
||
int *result)
|
||
{
|
||
int nibble;
|
||
int retval = 0;
|
||
|
||
while (ishex (*buff, &nibble))
|
||
{
|
||
buff++;
|
||
retval = retval << 4;
|
||
retval |= nibble & 0x0f;
|
||
}
|
||
*result = retval;
|
||
return buff;
|
||
}
|
||
|
||
static char *
|
||
unpack_nibble (char *buf, int *val)
|
||
{
|
||
ishex (*buf++, val);
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
pack_nibble (char *buf, int nibble)
|
||
{
|
||
*buf++ = hexchars[(nibble & 0x0f)];
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
pack_hex_byte (char *pkt, int byte)
|
||
{
|
||
*pkt++ = hexchars[(byte >> 4) & 0xf];
|
||
*pkt++ = hexchars[(byte & 0xf)];
|
||
return pkt;
|
||
}
|
||
|
||
static char *
|
||
unpack_byte (char *buf, int *value)
|
||
{
|
||
*value = stub_unpack_int (buf, 2);
|
||
return buf + 2;
|
||
}
|
||
|
||
static char *
|
||
pack_int (char *buf, int value)
|
||
{
|
||
buf = pack_hex_byte (buf, (value >> 24) & 0xff);
|
||
buf = pack_hex_byte (buf, (value >> 16) & 0xff);
|
||
buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
|
||
buf = pack_hex_byte (buf, (value & 0xff));
|
||
return buf;
|
||
}
|
||
|
||
static char *
|
||
unpack_int (char *buf, int *value)
|
||
{
|
||
*value = stub_unpack_int (buf, 8);
|
||
return buf + 8;
|
||
}
|
||
|
||
#if 0 /* currently unused, uncomment when needed */
|
||
static char *pack_string (char *pkt, char *string);
|
||
|
||
static char *
|
||
pack_string (char *pkt, char *string)
|
||
{
|
||
char ch;
|
||
int len;
|
||
|
||
len = strlen (string);
|
||
if (len > 200)
|
||
len = 200; /* Bigger than most GDB packets, junk??? */
|
||
pkt = pack_hex_byte (pkt, len);
|
||
while (len-- > 0)
|
||
{
|
||
ch = *string++;
|
||
if ((ch == '\0') || (ch == '#'))
|
||
ch = '*'; /* Protect encapsulation */
|
||
*pkt++ = ch;
|
||
}
|
||
return pkt;
|
||
}
|
||
#endif /* 0 (unused) */
|
||
|
||
static char *
|
||
unpack_string (char *src, char *dest, int length)
|
||
{
|
||
while (length--)
|
||
*dest++ = *src++;
|
||
*dest = '\0';
|
||
return src;
|
||
}
|
||
|
||
static char *
|
||
pack_threadid (char *pkt, threadref *id)
|
||
{
|
||
char *limit;
|
||
unsigned char *altid;
|
||
|
||
altid = (unsigned char *) id;
|
||
limit = pkt + BUF_THREAD_ID_SIZE;
|
||
while (pkt < limit)
|
||
pkt = pack_hex_byte (pkt, *altid++);
|
||
return pkt;
|
||
}
|
||
|
||
|
||
static char *
|
||
unpack_threadid (char *inbuf, threadref *id)
|
||
{
|
||
char *altref;
|
||
char *limit = inbuf + BUF_THREAD_ID_SIZE;
|
||
int x, y;
|
||
|
||
altref = (char *) id;
|
||
|
||
while (inbuf < limit)
|
||
{
|
||
x = stubhex (*inbuf++);
|
||
y = stubhex (*inbuf++);
|
||
*altref++ = (x << 4) | y;
|
||
}
|
||
return inbuf;
|
||
}
|
||
|
||
/* Externally, threadrefs are 64 bits but internally, they are still
|
||
ints. This is due to a mismatch of specifications. We would like
|
||
to use 64bit thread references internally. This is an adapter
|
||
function. */
|
||
|
||
void
|
||
int_to_threadref (threadref *id, int value)
|
||
{
|
||
unsigned char *scan;
|
||
|
||
scan = (unsigned char *) id;
|
||
{
|
||
int i = 4;
|
||
while (i--)
|
||
*scan++ = 0;
|
||
}
|
||
*scan++ = (value >> 24) & 0xff;
|
||
*scan++ = (value >> 16) & 0xff;
|
||
*scan++ = (value >> 8) & 0xff;
|
||
*scan++ = (value & 0xff);
|
||
}
|
||
|
||
static int
|
||
threadref_to_int (threadref *ref)
|
||
{
|
||
int i, value = 0;
|
||
unsigned char *scan;
|
||
|
||
scan = (char *) ref;
|
||
scan += 4;
|
||
i = 4;
|
||
while (i-- > 0)
|
||
value = (value << 8) | ((*scan++) & 0xff);
|
||
return value;
|
||
}
|
||
|
||
static void
|
||
copy_threadref (threadref *dest, threadref *src)
|
||
{
|
||
int i;
|
||
unsigned char *csrc, *cdest;
|
||
|
||
csrc = (unsigned char *) src;
|
||
cdest = (unsigned char *) dest;
|
||
i = 8;
|
||
while (i--)
|
||
*cdest++ = *csrc++;
|
||
}
|
||
|
||
static int
|
||
threadmatch (threadref *dest, threadref *src)
|
||
{
|
||
/* things are broken right now, so just assume we got a match */
|
||
#if 0
|
||
unsigned char *srcp, *destp;
|
||
int i, result;
|
||
srcp = (char *) src;
|
||
destp = (char *) dest;
|
||
|
||
result = 1;
|
||
while (i-- > 0)
|
||
result &= (*srcp++ == *destp++) ? 1 : 0;
|
||
return result;
|
||
#endif
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
threadid:1, # always request threadid
|
||
context_exists:2,
|
||
display:4,
|
||
unique_name:8,
|
||
more_display:16
|
||
*/
|
||
|
||
/* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
|
||
|
||
static char *
|
||
pack_threadinfo_request (char *pkt, int mode, threadref *id)
|
||
{
|
||
*pkt++ = 'q'; /* Info Query */
|
||
*pkt++ = 'P'; /* process or thread info */
|
||
pkt = pack_int (pkt, mode); /* mode */
|
||
pkt = pack_threadid (pkt, id); /* threadid */
|
||
*pkt = '\0'; /* terminate */
|
||
return pkt;
|
||
}
|
||
|
||
/* These values tag the fields in a thread info response packet */
|
||
/* Tagging the fields allows us to request specific fields and to
|
||
add more fields as time goes by */
|
||
|
||
#define TAG_THREADID 1 /* Echo the thread identifier */
|
||
#define TAG_EXISTS 2 /* Is this process defined enough to
|
||
fetch registers and its stack */
|
||
#define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
|
||
#define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is */
|
||
#define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
|
||
the process */
|
||
|
||
static int
|
||
remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
|
||
struct gdb_ext_thread_info *info)
|
||
{
|
||
int mask, length;
|
||
unsigned int tag;
|
||
threadref ref;
|
||
char *limit = pkt + PBUFSIZ; /* plausable parsing limit */
|
||
int retval = 1;
|
||
|
||
/* info->threadid = 0; FIXME: implement zero_threadref */
|
||
info->active = 0;
|
||
info->display[0] = '\0';
|
||
info->shortname[0] = '\0';
|
||
info->more_display[0] = '\0';
|
||
|
||
/* Assume the characters indicating the packet type have been stripped */
|
||
pkt = unpack_int (pkt, &mask); /* arg mask */
|
||
pkt = unpack_threadid (pkt, &ref);
|
||
|
||
if (mask == 0)
|
||
warning ("Incomplete response to threadinfo request\n");
|
||
if (!threadmatch (&ref, expectedref))
|
||
{ /* This is an answer to a different request */
|
||
warning ("ERROR RMT Thread info mismatch\n");
|
||
return 0;
|
||
}
|
||
copy_threadref (&info->threadid, &ref);
|
||
|
||
/* Loop on tagged fields , try to bail if somthing goes wrong */
|
||
|
||
while ((pkt < limit) && mask && *pkt) /* packets are terminated with nulls */
|
||
{
|
||
pkt = unpack_int (pkt, &tag); /* tag */
|
||
pkt = unpack_byte (pkt, &length); /* length */
|
||
if (!(tag & mask)) /* tags out of synch with mask */
|
||
{
|
||
warning ("ERROR RMT: threadinfo tag mismatch\n");
|
||
retval = 0;
|
||
break;
|
||
}
|
||
if (tag == TAG_THREADID)
|
||
{
|
||
if (length != 16)
|
||
{
|
||
warning ("ERROR RMT: length of threadid is not 16\n");
|
||
retval = 0;
|
||
break;
|
||
}
|
||
pkt = unpack_threadid (pkt, &ref);
|
||
mask = mask & ~TAG_THREADID;
|
||
continue;
|
||
}
|
||
if (tag == TAG_EXISTS)
|
||
{
|
||
info->active = stub_unpack_int (pkt, length);
|
||
pkt += length;
|
||
mask = mask & ~(TAG_EXISTS);
|
||
if (length > 8)
|
||
{
|
||
warning ("ERROR RMT: 'exists' length too long\n");
|
||
retval = 0;
|
||
break;
|
||
}
|
||
continue;
|
||
}
|
||
if (tag == TAG_THREADNAME)
|
||
{
|
||
pkt = unpack_string (pkt, &info->shortname[0], length);
|
||
mask = mask & ~TAG_THREADNAME;
|
||
continue;
|
||
}
|
||
if (tag == TAG_DISPLAY)
|
||
{
|
||
pkt = unpack_string (pkt, &info->display[0], length);
|
||
mask = mask & ~TAG_DISPLAY;
|
||
continue;
|
||
}
|
||
if (tag == TAG_MOREDISPLAY)
|
||
{
|
||
pkt = unpack_string (pkt, &info->more_display[0], length);
|
||
mask = mask & ~TAG_MOREDISPLAY;
|
||
continue;
|
||
}
|
||
warning ("ERROR RMT: unknown thread info tag\n");
|
||
break; /* Not a tag we know about */
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
static int
|
||
remote_get_threadinfo (threadref *threadid, int fieldset, /* TAG mask */
|
||
struct gdb_ext_thread_info *info)
|
||
{
|
||
int result;
|
||
char *threadinfo_pkt = alloca (PBUFSIZ);
|
||
|
||
pack_threadinfo_request (threadinfo_pkt, fieldset, threadid);
|
||
putpkt (threadinfo_pkt);
|
||
getpkt (threadinfo_pkt, PBUFSIZ, 0);
|
||
result = remote_unpack_thread_info_response (threadinfo_pkt + 2, threadid,
|
||
info);
|
||
return result;
|
||
}
|
||
|
||
/* Unfortunately, 61 bit thread-ids are bigger than the internal
|
||
representation of a threadid. */
|
||
|
||
static int
|
||
adapt_remote_get_threadinfo (gdb_threadref *ref, int selection,
|
||
struct gdb_ext_thread_info *info)
|
||
{
|
||
threadref lclref;
|
||
|
||
int_to_threadref (&lclref, *ref);
|
||
return remote_get_threadinfo (&lclref, selection, info);
|
||
}
|
||
|
||
/* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
|
||
|
||
static char *
|
||
pack_threadlist_request (char *pkt, int startflag, int threadcount,
|
||
threadref *nextthread)
|
||
{
|
||
*pkt++ = 'q'; /* info query packet */
|
||
*pkt++ = 'L'; /* Process LIST or threadLIST request */
|
||
pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
|
||
pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
|
||
pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
|
||
*pkt = '\0';
|
||
return pkt;
|
||
}
|
||
|
||
/* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
|
||
|
||
static int
|
||
parse_threadlist_response (char *pkt, int result_limit,
|
||
threadref *original_echo, threadref *resultlist,
|
||
int *doneflag)
|
||
{
|
||
char *limit;
|
||
int count, resultcount, done;
|
||
|
||
resultcount = 0;
|
||
/* Assume the 'q' and 'M chars have been stripped. */
|
||
limit = pkt + (PBUFSIZ - BUF_THREAD_ID_SIZE); /* done parse past here */
|
||
pkt = unpack_byte (pkt, &count); /* count field */
|
||
pkt = unpack_nibble (pkt, &done);
|
||
/* The first threadid is the argument threadid. */
|
||
pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
|
||
while ((count-- > 0) && (pkt < limit))
|
||
{
|
||
pkt = unpack_threadid (pkt, resultlist++);
|
||
if (resultcount++ >= result_limit)
|
||
break;
|
||
}
|
||
if (doneflag)
|
||
*doneflag = done;
|
||
return resultcount;
|
||
}
|
||
|
||
static int
|
||
remote_get_threadlist (int startflag, threadref *nextthread, int result_limit,
|
||
int *done, int *result_count, threadref *threadlist)
|
||
{
|
||
static threadref echo_nextthread;
|
||
char *threadlist_packet = alloca (PBUFSIZ);
|
||
char *t_response = alloca (PBUFSIZ);
|
||
int result = 1;
|
||
|
||
/* Trancate result limit to be smaller than the packet size */
|
||
if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10) >= PBUFSIZ)
|
||
result_limit = (PBUFSIZ / BUF_THREAD_ID_SIZE) - 2;
|
||
|
||
pack_threadlist_request (threadlist_packet,
|
||
startflag, result_limit, nextthread);
|
||
putpkt (threadlist_packet);
|
||
getpkt (t_response, PBUFSIZ, 0);
|
||
|
||
*result_count =
|
||
parse_threadlist_response (t_response + 2, result_limit, &echo_nextthread,
|
||
threadlist, done);
|
||
|
||
if (!threadmatch (&echo_nextthread, nextthread))
|
||
{
|
||
/* FIXME: This is a good reason to drop the packet */
|
||
/* Possably, there is a duplicate response */
|
||
/* Possabilities :
|
||
retransmit immediatly - race conditions
|
||
retransmit after timeout - yes
|
||
exit
|
||
wait for packet, then exit
|
||
*/
|
||
warning ("HMM: threadlist did not echo arg thread, dropping it\n");
|
||
return 0; /* I choose simply exiting */
|
||
}
|
||
if (*result_count <= 0)
|
||
{
|
||
if (*done != 1)
|
||
{
|
||
warning ("RMT ERROR : failed to get remote thread list\n");
|
||
result = 0;
|
||
}
|
||
return result; /* break; */
|
||
}
|
||
if (*result_count > result_limit)
|
||
{
|
||
*result_count = 0;
|
||
warning ("RMT ERROR: threadlist response longer than requested\n");
|
||
return 0;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/* This is the interface between remote and threads, remotes upper interface */
|
||
|
||
/* remote_find_new_threads retrieves the thread list and for each
|
||
thread in the list, looks up the thread in GDB's internal list,
|
||
ading the thread if it does not already exist. This involves
|
||
getting partial thread lists from the remote target so, polling the
|
||
quit_flag is required. */
|
||
|
||
|
||
/* About this many threadisds fit in a packet. */
|
||
|
||
#define MAXTHREADLISTRESULTS 32
|
||
|
||
static int
|
||
remote_threadlist_iterator (rmt_thread_action stepfunction, void *context,
|
||
int looplimit)
|
||
{
|
||
int done, i, result_count;
|
||
int startflag = 1;
|
||
int result = 1;
|
||
int loopcount = 0;
|
||
static threadref nextthread;
|
||
static threadref resultthreadlist[MAXTHREADLISTRESULTS];
|
||
|
||
done = 0;
|
||
while (!done)
|
||
{
|
||
if (loopcount++ > looplimit)
|
||
{
|
||
result = 0;
|
||
warning ("Remote fetch threadlist -infinite loop-\n");
|
||
break;
|
||
}
|
||
if (!remote_get_threadlist (startflag, &nextthread, MAXTHREADLISTRESULTS,
|
||
&done, &result_count, resultthreadlist))
|
||
{
|
||
result = 0;
|
||
break;
|
||
}
|
||
/* clear for later iterations */
|
||
startflag = 0;
|
||
/* Setup to resume next batch of thread references, set nextthread. */
|
||
if (result_count >= 1)
|
||
copy_threadref (&nextthread, &resultthreadlist[result_count - 1]);
|
||
i = 0;
|
||
while (result_count--)
|
||
if (!(result = (*stepfunction) (&resultthreadlist[i++], context)))
|
||
break;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
remote_newthread_step (threadref *ref, void *context)
|
||
{
|
||
int pid;
|
||
|
||
pid = threadref_to_int (ref);
|
||
if (!in_thread_list (pid))
|
||
add_thread (pid);
|
||
return 1; /* continue iterator */
|
||
}
|
||
|
||
#define CRAZY_MAX_THREADS 1000
|
||
|
||
static int
|
||
remote_current_thread (int oldpid)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
putpkt ("qC");
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
if (buf[0] == 'Q' && buf[1] == 'C')
|
||
return strtol (&buf[2], NULL, 16);
|
||
else
|
||
return oldpid;
|
||
}
|
||
|
||
/* Find new threads for info threads command.
|
||
* Original version, using John Metzler's thread protocol.
|
||
*/
|
||
|
||
static void
|
||
remote_find_new_threads (void)
|
||
{
|
||
remote_threadlist_iterator (remote_newthread_step, 0,
|
||
CRAZY_MAX_THREADS);
|
||
if (inferior_pid == MAGIC_NULL_PID) /* ack ack ack */
|
||
inferior_pid = remote_current_thread (inferior_pid);
|
||
}
|
||
|
||
/*
|
||
* Find all threads for info threads command.
|
||
* Uses new thread protocol contributed by Cisco.
|
||
* Falls back and attempts to use the older method (above)
|
||
* if the target doesn't respond to the new method.
|
||
*/
|
||
|
||
static void
|
||
remote_threads_info (void)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *bufp;
|
||
int tid;
|
||
|
||
if (remote_desc == 0) /* paranoia */
|
||
error ("Command can only be used when connected to the remote target.");
|
||
|
||
if (use_threadinfo_query)
|
||
{
|
||
putpkt ("qfThreadInfo");
|
||
bufp = buf;
|
||
getpkt (bufp, PBUFSIZ, 0);
|
||
if (bufp[0] != '\0') /* q packet recognized */
|
||
{
|
||
while (*bufp++ == 'm') /* reply contains one or more TID */
|
||
{
|
||
do
|
||
{
|
||
tid = strtol (bufp, &bufp, 16);
|
||
if (tid != 0 && !in_thread_list (tid))
|
||
add_thread (tid);
|
||
}
|
||
while (*bufp++ == ','); /* comma-separated list */
|
||
putpkt ("qsThreadInfo");
|
||
bufp = buf;
|
||
getpkt (bufp, PBUFSIZ, 0);
|
||
}
|
||
return; /* done */
|
||
}
|
||
}
|
||
|
||
/* Else fall back to old method based on jmetzler protocol. */
|
||
use_threadinfo_query = 0;
|
||
remote_find_new_threads ();
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Collect a descriptive string about the given thread.
|
||
* The target may say anything it wants to about the thread
|
||
* (typically info about its blocked / runnable state, name, etc.).
|
||
* This string will appear in the info threads display.
|
||
*
|
||
* Optional: targets are not required to implement this function.
|
||
*/
|
||
|
||
static char *
|
||
remote_threads_extra_info (struct thread_info *tp)
|
||
{
|
||
int result;
|
||
int set;
|
||
threadref id;
|
||
struct gdb_ext_thread_info threadinfo;
|
||
static char display_buf[100]; /* arbitrary... */
|
||
char *bufp = alloca (PBUFSIZ);
|
||
int n = 0; /* position in display_buf */
|
||
|
||
if (remote_desc == 0) /* paranoia */
|
||
internal_error ("remote_threads_extra_info");
|
||
|
||
if (use_threadextra_query)
|
||
{
|
||
sprintf (bufp, "qThreadExtraInfo,%x", tp->pid);
|
||
putpkt (bufp);
|
||
getpkt (bufp, PBUFSIZ, 0);
|
||
if (bufp[0] != 0)
|
||
{
|
||
char *p;
|
||
|
||
for (p = display_buf;
|
||
p < display_buf + sizeof(display_buf) - 1 &&
|
||
bufp[0] != 0 &&
|
||
bufp[1] != 0;
|
||
p++, bufp+=2)
|
||
{
|
||
*p = fromhex (bufp[0]) * 16 + fromhex (bufp[1]);
|
||
}
|
||
*p = 0;
|
||
return display_buf;
|
||
}
|
||
}
|
||
|
||
/* If the above query fails, fall back to the old method. */
|
||
use_threadextra_query = 0;
|
||
set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
|
||
| TAG_MOREDISPLAY | TAG_DISPLAY;
|
||
int_to_threadref (&id, tp->pid);
|
||
if (remote_get_threadinfo (&id, set, &threadinfo))
|
||
if (threadinfo.active)
|
||
{
|
||
if (*threadinfo.shortname)
|
||
n += sprintf(&display_buf[0], " Name: %s,", threadinfo.shortname);
|
||
if (*threadinfo.display)
|
||
n += sprintf(&display_buf[n], " State: %s,", threadinfo.display);
|
||
if (*threadinfo.more_display)
|
||
n += sprintf(&display_buf[n], " Priority: %s",
|
||
threadinfo.more_display);
|
||
|
||
if (n > 0)
|
||
{
|
||
/* for purely cosmetic reasons, clear up trailing commas */
|
||
if (',' == display_buf[n-1])
|
||
display_buf[n-1] = ' ';
|
||
return display_buf;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
|
||
|
||
/* Restart the remote side; this is an extended protocol operation. */
|
||
|
||
static void
|
||
extended_remote_restart (void)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
/* Send the restart command; for reasons I don't understand the
|
||
remote side really expects a number after the "R". */
|
||
buf[0] = 'R';
|
||
sprintf (&buf[1], "%x", 0);
|
||
putpkt (buf);
|
||
|
||
/* Now query for status so this looks just like we restarted
|
||
gdbserver from scratch. */
|
||
putpkt ("?");
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
}
|
||
|
||
/* Clean up connection to a remote debugger. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
remote_close (int quitting)
|
||
{
|
||
if (remote_desc)
|
||
SERIAL_CLOSE (remote_desc);
|
||
remote_desc = NULL;
|
||
}
|
||
|
||
/* Query the remote side for the text, data and bss offsets. */
|
||
|
||
static void
|
||
get_offsets (void)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *ptr;
|
||
int lose;
|
||
CORE_ADDR text_addr, data_addr, bss_addr;
|
||
struct section_offsets *offs;
|
||
|
||
putpkt ("qOffsets");
|
||
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
if (buf[0] == '\000')
|
||
return; /* Return silently. Stub doesn't support
|
||
this command. */
|
||
if (buf[0] == 'E')
|
||
{
|
||
warning ("Remote failure reply: %s", buf);
|
||
return;
|
||
}
|
||
|
||
/* Pick up each field in turn. This used to be done with scanf, but
|
||
scanf will make trouble if CORE_ADDR size doesn't match
|
||
conversion directives correctly. The following code will work
|
||
with any size of CORE_ADDR. */
|
||
text_addr = data_addr = bss_addr = 0;
|
||
ptr = buf;
|
||
lose = 0;
|
||
|
||
if (strncmp (ptr, "Text=", 5) == 0)
|
||
{
|
||
ptr += 5;
|
||
/* Don't use strtol, could lose on big values. */
|
||
while (*ptr && *ptr != ';')
|
||
text_addr = (text_addr << 4) + fromhex (*ptr++);
|
||
}
|
||
else
|
||
lose = 1;
|
||
|
||
if (!lose && strncmp (ptr, ";Data=", 6) == 0)
|
||
{
|
||
ptr += 6;
|
||
while (*ptr && *ptr != ';')
|
||
data_addr = (data_addr << 4) + fromhex (*ptr++);
|
||
}
|
||
else
|
||
lose = 1;
|
||
|
||
if (!lose && strncmp (ptr, ";Bss=", 5) == 0)
|
||
{
|
||
ptr += 5;
|
||
while (*ptr && *ptr != ';')
|
||
bss_addr = (bss_addr << 4) + fromhex (*ptr++);
|
||
}
|
||
else
|
||
lose = 1;
|
||
|
||
if (lose)
|
||
error ("Malformed response to offset query, %s", buf);
|
||
|
||
if (symfile_objfile == NULL)
|
||
return;
|
||
|
||
offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
|
||
memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
|
||
|
||
offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
|
||
|
||
/* This is a temporary kludge to force data and bss to use the same offsets
|
||
because that's what nlmconv does now. The real solution requires changes
|
||
to the stub and remote.c that I don't have time to do right now. */
|
||
|
||
offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
|
||
offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
|
||
|
||
objfile_relocate (symfile_objfile, offs);
|
||
}
|
||
|
||
/*
|
||
* Cisco version of section offsets:
|
||
*
|
||
* Instead of having GDB query the target for the section offsets,
|
||
* Cisco lets the target volunteer the information! It's also in
|
||
* a different format, so here are the functions that will decode
|
||
* a section offset packet from a Cisco target.
|
||
*/
|
||
|
||
/*
|
||
* Function: remote_cisco_section_offsets
|
||
*
|
||
* Returns: zero for success, non-zero for failure
|
||
*/
|
||
|
||
static int
|
||
remote_cisco_section_offsets (bfd_vma text_addr,
|
||
bfd_vma data_addr,
|
||
bfd_vma bss_addr,
|
||
bfd_signed_vma *text_offs,
|
||
bfd_signed_vma *data_offs,
|
||
bfd_signed_vma *bss_offs)
|
||
{
|
||
bfd_vma text_base, data_base, bss_base;
|
||
struct minimal_symbol *start;
|
||
asection *sect;
|
||
bfd *abfd;
|
||
int len;
|
||
char *p;
|
||
|
||
if (symfile_objfile == NULL)
|
||
return -1; /* no can do nothin' */
|
||
|
||
start = lookup_minimal_symbol ("_start", NULL, NULL);
|
||
if (start == NULL)
|
||
return -1; /* Can't find "_start" symbol */
|
||
|
||
data_base = bss_base = 0;
|
||
text_base = SYMBOL_VALUE_ADDRESS (start);
|
||
|
||
abfd = symfile_objfile->obfd;
|
||
for (sect = abfd->sections;
|
||
sect != 0;
|
||
sect = sect->next)
|
||
{
|
||
p = (unsigned char *) bfd_get_section_name (abfd, sect);
|
||
len = strlen (p);
|
||
if (strcmp (p + len - 4, "data") == 0) /* ends in "data" */
|
||
if (data_base == 0 ||
|
||
data_base > bfd_get_section_vma (abfd, sect))
|
||
data_base = bfd_get_section_vma (abfd, sect);
|
||
if (strcmp (p + len - 3, "bss") == 0) /* ends in "bss" */
|
||
if (bss_base == 0 ||
|
||
bss_base > bfd_get_section_vma (abfd, sect))
|
||
bss_base = bfd_get_section_vma (abfd, sect);
|
||
}
|
||
*text_offs = text_addr - text_base;
|
||
*data_offs = data_addr - data_base;
|
||
*bss_offs = bss_addr - bss_base;
|
||
if (remote_debug)
|
||
{
|
||
char tmp[128];
|
||
|
||
sprintf (tmp, "VMA: text = 0x");
|
||
sprintf_vma (tmp + strlen (tmp), text_addr);
|
||
sprintf (tmp + strlen (tmp), " data = 0x");
|
||
sprintf_vma (tmp + strlen (tmp), data_addr);
|
||
sprintf (tmp + strlen (tmp), " bss = 0x");
|
||
sprintf_vma (tmp + strlen (tmp), bss_addr);
|
||
fprintf_filtered (gdb_stdlog, tmp);
|
||
fprintf_filtered (gdb_stdlog,
|
||
"Reloc offset: text = 0x%s data = 0x%s bss = 0x%s\n",
|
||
paddr_nz (*text_offs),
|
||
paddr_nz (*data_offs),
|
||
paddr_nz (*bss_offs));
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Function: remote_cisco_objfile_relocate
|
||
*
|
||
* Relocate the symbol file for a remote target.
|
||
*/
|
||
|
||
void
|
||
remote_cisco_objfile_relocate (bfd_signed_vma text_off, bfd_signed_vma data_off,
|
||
bfd_signed_vma bss_off)
|
||
{
|
||
struct section_offsets *offs;
|
||
|
||
if (text_off != 0 || data_off != 0 || bss_off != 0)
|
||
{
|
||
/* FIXME: This code assumes gdb-stabs.h is being used; it's
|
||
broken for xcoff, dwarf, sdb-coff, etc. But there is no
|
||
simple canonical representation for this stuff. */
|
||
|
||
offs = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
|
||
memcpy (offs, symfile_objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
|
||
|
||
offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_off;
|
||
offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_off;
|
||
offs->offsets[SECT_OFF_BSS (symfile_objfile)] = bss_off;
|
||
|
||
/* First call the standard objfile_relocate. */
|
||
objfile_relocate (symfile_objfile, offs);
|
||
|
||
/* Now we need to fix up the section entries already attached to
|
||
the exec target. These entries will control memory transfers
|
||
from the exec file. */
|
||
|
||
exec_set_section_offsets (text_off, data_off, bss_off);
|
||
}
|
||
}
|
||
|
||
/* Stub for catch_errors. */
|
||
|
||
static int
|
||
remote_start_remote_dummy (void *dummy)
|
||
{
|
||
start_remote (); /* Initialize gdb process mechanisms */
|
||
return 1;
|
||
}
|
||
|
||
static int
|
||
remote_start_remote (PTR dummy)
|
||
{
|
||
immediate_quit++; /* Allow user to interrupt it */
|
||
|
||
/* Ack any packet which the remote side has already sent. */
|
||
SERIAL_WRITE (remote_desc, "+", 1);
|
||
|
||
/* Let the stub know that we want it to return the thread. */
|
||
set_thread (-1, 0);
|
||
|
||
inferior_pid = remote_current_thread (inferior_pid);
|
||
|
||
get_offsets (); /* Get text, data & bss offsets */
|
||
|
||
putpkt ("?"); /* initiate a query from remote machine */
|
||
immediate_quit--;
|
||
|
||
return remote_start_remote_dummy (dummy);
|
||
}
|
||
|
||
/* Open a connection to a remote debugger.
|
||
NAME is the filename used for communication. */
|
||
|
||
static void
|
||
remote_open (char *name, int from_tty)
|
||
{
|
||
remote_open_1 (name, from_tty, &remote_ops, 0);
|
||
}
|
||
|
||
/* Just like remote_open, but with asynchronous support. */
|
||
static void
|
||
remote_async_open (char *name, int from_tty)
|
||
{
|
||
remote_async_open_1 (name, from_tty, &remote_async_ops, 0);
|
||
}
|
||
|
||
/* Open a connection to a remote debugger using the extended
|
||
remote gdb protocol. NAME is the filename used for communication. */
|
||
|
||
static void
|
||
extended_remote_open (char *name, int from_tty)
|
||
{
|
||
remote_open_1 (name, from_tty, &extended_remote_ops, 1 /*extended_p */ );
|
||
}
|
||
|
||
/* Just like extended_remote_open, but with asynchronous support. */
|
||
static void
|
||
extended_remote_async_open (char *name, int from_tty)
|
||
{
|
||
remote_async_open_1 (name, from_tty, &extended_async_remote_ops, 1 /*extended_p */ );
|
||
}
|
||
|
||
/* Generic code for opening a connection to a remote target. */
|
||
|
||
static void
|
||
init_all_packet_configs (void)
|
||
{
|
||
int i;
|
||
update_packet_config (&remote_protocol_P);
|
||
for (i = 0; i < NR_Z_PACKET_TYPES; i++)
|
||
update_packet_config (&remote_protocol_Z[i]);
|
||
/* Force remote_write_bytes to check whether target supports binary
|
||
downloading. */
|
||
update_packet_config (&remote_protocol_binary_download);
|
||
}
|
||
|
||
static void
|
||
remote_open_1 (char *name, int from_tty, struct target_ops *target,
|
||
int extended_p)
|
||
{
|
||
if (name == 0)
|
||
error ("To open a remote debug connection, you need to specify what\n\
|
||
serial device is attached to the remote system\n\
|
||
(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
|
||
|
||
/* See FIXME above */
|
||
wait_forever_enabled_p = 1;
|
||
|
||
target_preopen (from_tty);
|
||
|
||
unpush_target (target);
|
||
|
||
remote_desc = SERIAL_OPEN (name);
|
||
if (!remote_desc)
|
||
perror_with_name (name);
|
||
|
||
if (baud_rate != -1)
|
||
{
|
||
if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
|
||
{
|
||
SERIAL_CLOSE (remote_desc);
|
||
perror_with_name (name);
|
||
}
|
||
}
|
||
|
||
SERIAL_RAW (remote_desc);
|
||
|
||
/* If there is something sitting in the buffer we might take it as a
|
||
response to a command, which would be bad. */
|
||
SERIAL_FLUSH_INPUT (remote_desc);
|
||
|
||
if (from_tty)
|
||
{
|
||
puts_filtered ("Remote debugging using ");
|
||
puts_filtered (name);
|
||
puts_filtered ("\n");
|
||
}
|
||
push_target (target); /* Switch to using remote target now */
|
||
|
||
init_all_packet_configs ();
|
||
|
||
general_thread = -2;
|
||
continue_thread = -2;
|
||
|
||
/* Probe for ability to use "ThreadInfo" query, as required. */
|
||
use_threadinfo_query = 1;
|
||
use_threadextra_query = 1;
|
||
|
||
/* Without this, some commands which require an active target (such
|
||
as kill) won't work. This variable serves (at least) double duty
|
||
as both the pid of the target process (if it has such), and as a
|
||
flag indicating that a target is active. These functions should
|
||
be split out into seperate variables, especially since GDB will
|
||
someday have a notion of debugging several processes. */
|
||
|
||
inferior_pid = MAGIC_NULL_PID;
|
||
/* Start the remote connection; if error (0), discard this target.
|
||
In particular, if the user quits, be sure to discard it
|
||
(we'd be in an inconsistent state otherwise). */
|
||
if (!catch_errors (remote_start_remote, NULL,
|
||
"Couldn't establish connection to remote target\n",
|
||
RETURN_MASK_ALL))
|
||
{
|
||
pop_target ();
|
||
return;
|
||
}
|
||
|
||
if (extended_p)
|
||
{
|
||
/* tell the remote that we're using the extended protocol. */
|
||
char *buf = alloca (PBUFSIZ);
|
||
putpkt ("!");
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
}
|
||
}
|
||
|
||
/* Just like remote_open but with asynchronous support. */
|
||
static void
|
||
remote_async_open_1 (char *name, int from_tty, struct target_ops *target,
|
||
int extended_p)
|
||
{
|
||
if (name == 0)
|
||
error ("To open a remote debug connection, you need to specify what\n\
|
||
serial device is attached to the remote system\n\
|
||
(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
|
||
|
||
target_preopen (from_tty);
|
||
|
||
unpush_target (target);
|
||
|
||
remote_desc = SERIAL_OPEN (name);
|
||
if (!remote_desc)
|
||
perror_with_name (name);
|
||
|
||
if (baud_rate != -1)
|
||
{
|
||
if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
|
||
{
|
||
SERIAL_CLOSE (remote_desc);
|
||
perror_with_name (name);
|
||
}
|
||
}
|
||
|
||
SERIAL_RAW (remote_desc);
|
||
|
||
/* If there is something sitting in the buffer we might take it as a
|
||
response to a command, which would be bad. */
|
||
SERIAL_FLUSH_INPUT (remote_desc);
|
||
|
||
if (from_tty)
|
||
{
|
||
puts_filtered ("Remote debugging using ");
|
||
puts_filtered (name);
|
||
puts_filtered ("\n");
|
||
}
|
||
|
||
push_target (target); /* Switch to using remote target now */
|
||
|
||
init_all_packet_configs ();
|
||
|
||
general_thread = -2;
|
||
continue_thread = -2;
|
||
|
||
/* Probe for ability to use "ThreadInfo" query, as required. */
|
||
use_threadinfo_query = 1;
|
||
use_threadextra_query = 1;
|
||
|
||
/* Without this, some commands which require an active target (such
|
||
as kill) won't work. This variable serves (at least) double duty
|
||
as both the pid of the target process (if it has such), and as a
|
||
flag indicating that a target is active. These functions should
|
||
be split out into seperate variables, especially since GDB will
|
||
someday have a notion of debugging several processes. */
|
||
inferior_pid = MAGIC_NULL_PID;
|
||
|
||
/* With this target we start out by owning the terminal. */
|
||
remote_async_terminal_ours_p = 1;
|
||
|
||
/* FIXME: cagney/1999-09-23: During the initial connection it is
|
||
assumed that the target is already ready and able to respond to
|
||
requests. Unfortunately remote_start_remote() eventually calls
|
||
wait_for_inferior() with no timeout. wait_forever_enabled_p gets
|
||
around this. Eventually a mechanism that allows
|
||
wait_for_inferior() to expect/get timeouts will be
|
||
implemented. */
|
||
wait_forever_enabled_p = 0;
|
||
|
||
/* Start the remote connection; if error (0), discard this target.
|
||
In particular, if the user quits, be sure to discard it
|
||
(we'd be in an inconsistent state otherwise). */
|
||
if (!catch_errors (remote_start_remote, NULL,
|
||
"Couldn't establish connection to remote target\n",
|
||
RETURN_MASK_ALL))
|
||
{
|
||
pop_target ();
|
||
wait_forever_enabled_p = 1;
|
||
return;
|
||
}
|
||
|
||
wait_forever_enabled_p = 1;
|
||
|
||
if (extended_p)
|
||
{
|
||
/* tell the remote that we're using the extended protocol. */
|
||
char *buf = alloca (PBUFSIZ);
|
||
putpkt ("!");
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
}
|
||
}
|
||
|
||
/* This takes a program previously attached to and detaches it. After
|
||
this is done, GDB can be used to debug some other program. We
|
||
better not have left any breakpoints in the target program or it'll
|
||
die when it hits one. */
|
||
|
||
static void
|
||
remote_detach (char *args, int from_tty)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
if (args)
|
||
error ("Argument given to \"detach\" when remotely debugging.");
|
||
|
||
/* Tell the remote target to detach. */
|
||
strcpy (buf, "D");
|
||
remote_send (buf, PBUFSIZ);
|
||
|
||
target_mourn_inferior ();
|
||
if (from_tty)
|
||
puts_filtered ("Ending remote debugging.\n");
|
||
|
||
}
|
||
|
||
/* Same as remote_detach, but with async support. */
|
||
static void
|
||
remote_async_detach (char *args, int from_tty)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
if (args)
|
||
error ("Argument given to \"detach\" when remotely debugging.");
|
||
|
||
/* Tell the remote target to detach. */
|
||
strcpy (buf, "D");
|
||
remote_send (buf, PBUFSIZ);
|
||
|
||
/* Unregister the file descriptor from the event loop. */
|
||
if (target_is_async_p ())
|
||
SERIAL_ASYNC (remote_desc, NULL, 0);
|
||
|
||
target_mourn_inferior ();
|
||
if (from_tty)
|
||
puts_filtered ("Ending remote debugging.\n");
|
||
}
|
||
|
||
/* Convert hex digit A to a number. */
|
||
|
||
int
|
||
fromhex (int a)
|
||
{
|
||
if (a >= '0' && a <= '9')
|
||
return a - '0';
|
||
else if (a >= 'a' && a <= 'f')
|
||
return a - 'a' + 10;
|
||
else if (a >= 'A' && a <= 'F')
|
||
return a - 'A' + 10;
|
||
else
|
||
error ("Reply contains invalid hex digit %d", a);
|
||
}
|
||
|
||
/* Convert number NIB to a hex digit. */
|
||
|
||
static int
|
||
tohex (int nib)
|
||
{
|
||
if (nib < 10)
|
||
return '0' + nib;
|
||
else
|
||
return 'a' + nib - 10;
|
||
}
|
||
|
||
/* Tell the remote machine to resume. */
|
||
|
||
static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
|
||
|
||
static int last_sent_step;
|
||
|
||
static void
|
||
remote_resume (int pid, int step, enum target_signal siggnal)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
if (pid == -1)
|
||
set_thread (0, 0); /* run any thread */
|
||
else
|
||
set_thread (pid, 0); /* run this thread */
|
||
|
||
last_sent_signal = siggnal;
|
||
last_sent_step = step;
|
||
|
||
/* A hook for when we need to do something at the last moment before
|
||
resumption. */
|
||
if (target_resume_hook)
|
||
(*target_resume_hook) ();
|
||
|
||
if (siggnal != TARGET_SIGNAL_0)
|
||
{
|
||
buf[0] = step ? 'S' : 'C';
|
||
buf[1] = tohex (((int) siggnal >> 4) & 0xf);
|
||
buf[2] = tohex ((int) siggnal & 0xf);
|
||
buf[3] = '\0';
|
||
}
|
||
else
|
||
strcpy (buf, step ? "s" : "c");
|
||
|
||
putpkt (buf);
|
||
}
|
||
|
||
/* Same as remote_resume, but with async support. */
|
||
static void
|
||
remote_async_resume (int pid, int step, enum target_signal siggnal)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
if (pid == -1)
|
||
set_thread (0, 0); /* run any thread */
|
||
else
|
||
set_thread (pid, 0); /* run this thread */
|
||
|
||
last_sent_signal = siggnal;
|
||
last_sent_step = step;
|
||
|
||
/* A hook for when we need to do something at the last moment before
|
||
resumption. */
|
||
if (target_resume_hook)
|
||
(*target_resume_hook) ();
|
||
|
||
if (siggnal != TARGET_SIGNAL_0)
|
||
{
|
||
buf[0] = step ? 'S' : 'C';
|
||
buf[1] = tohex (((int) siggnal >> 4) & 0xf);
|
||
buf[2] = tohex ((int) siggnal & 0xf);
|
||
buf[3] = '\0';
|
||
}
|
||
else
|
||
strcpy (buf, step ? "s" : "c");
|
||
|
||
/* We are about to start executing the inferior, let's register it
|
||
with the event loop. NOTE: this is the one place where all the
|
||
execution commands end up. We could alternatively do this in each
|
||
of the execution commands in infcmd.c.*/
|
||
/* FIXME: ezannoni 1999-09-28: We may need to move this out of here
|
||
into infcmd.c in order to allow inferior function calls to work
|
||
NOT asynchronously. */
|
||
if (event_loop_p && target_can_async_p ())
|
||
target_async (inferior_event_handler, 0);
|
||
/* Tell the world that the target is now executing. */
|
||
/* FIXME: cagney/1999-09-23: Is it the targets responsibility to set
|
||
this? Instead, should the client of target just assume (for
|
||
async targets) that the target is going to start executing? Is
|
||
this information already found in the continuation block? */
|
||
if (target_is_async_p ())
|
||
target_executing = 1;
|
||
putpkt (buf);
|
||
}
|
||
|
||
|
||
/* Set up the signal handler for SIGINT, while the target is
|
||
executing, ovewriting the 'regular' SIGINT signal handler. */
|
||
static void
|
||
initialize_sigint_signal_handler (void)
|
||
{
|
||
sigint_remote_token =
|
||
create_async_signal_handler (async_remote_interrupt, NULL);
|
||
signal (SIGINT, handle_remote_sigint);
|
||
}
|
||
|
||
/* Signal handler for SIGINT, while the target is executing. */
|
||
static void
|
||
handle_remote_sigint (int sig)
|
||
{
|
||
signal (sig, handle_remote_sigint_twice);
|
||
sigint_remote_twice_token =
|
||
create_async_signal_handler (async_remote_interrupt_twice, NULL);
|
||
mark_async_signal_handler_wrapper (sigint_remote_token);
|
||
}
|
||
|
||
/* Signal handler for SIGINT, installed after SIGINT has already been
|
||
sent once. It will take effect the second time that the user sends
|
||
a ^C. */
|
||
static void
|
||
handle_remote_sigint_twice (int sig)
|
||
{
|
||
signal (sig, handle_sigint);
|
||
sigint_remote_twice_token =
|
||
create_async_signal_handler (inferior_event_handler_wrapper, NULL);
|
||
mark_async_signal_handler_wrapper (sigint_remote_twice_token);
|
||
}
|
||
|
||
/* Perform the real interruption of the target execution, in response
|
||
to a ^C. */
|
||
static void
|
||
async_remote_interrupt (gdb_client_data arg)
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
|
||
|
||
target_stop ();
|
||
}
|
||
|
||
/* Perform interrupt, if the first attempt did not succeed. Just give
|
||
up on the target alltogether. */
|
||
void
|
||
async_remote_interrupt_twice (gdb_client_data arg)
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "remote_interrupt_twice called\n");
|
||
/* Do something only if the target was not killed by the previous
|
||
cntl-C. */
|
||
if (target_executing)
|
||
{
|
||
interrupt_query ();
|
||
signal (SIGINT, handle_remote_sigint);
|
||
}
|
||
}
|
||
|
||
/* Reinstall the usual SIGINT handlers, after the target has
|
||
stopped. */
|
||
static void
|
||
cleanup_sigint_signal_handler (void *dummy)
|
||
{
|
||
signal (SIGINT, handle_sigint);
|
||
if (sigint_remote_twice_token)
|
||
delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_twice_token);
|
||
if (sigint_remote_token)
|
||
delete_async_signal_handler ((struct async_signal_handler **) & sigint_remote_token);
|
||
}
|
||
|
||
/* Send ^C to target to halt it. Target will respond, and send us a
|
||
packet. */
|
||
static void (*ofunc) (int);
|
||
|
||
/* The command line interface's stop routine. This function is installed
|
||
as a signal handler for SIGINT. The first time a user requests a
|
||
stop, we call remote_stop to send a break or ^C. If there is no
|
||
response from the target (it didn't stop when the user requested it),
|
||
we ask the user if he'd like to detach from the target. */
|
||
static void
|
||
remote_interrupt (int signo)
|
||
{
|
||
/* If this doesn't work, try more severe steps. */
|
||
signal (signo, remote_interrupt_twice);
|
||
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
|
||
|
||
target_stop ();
|
||
}
|
||
|
||
/* The user typed ^C twice. */
|
||
|
||
static void
|
||
remote_interrupt_twice (int signo)
|
||
{
|
||
signal (signo, ofunc);
|
||
interrupt_query ();
|
||
signal (signo, remote_interrupt);
|
||
}
|
||
|
||
/* This is the generic stop called via the target vector. When a target
|
||
interrupt is requested, either by the command line or the GUI, we
|
||
will eventually end up here. */
|
||
static void
|
||
remote_stop (void)
|
||
{
|
||
/* Send a break or a ^C, depending on user preference. */
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
|
||
|
||
if (remote_break)
|
||
SERIAL_SEND_BREAK (remote_desc);
|
||
else
|
||
SERIAL_WRITE (remote_desc, "\003", 1);
|
||
}
|
||
|
||
/* Ask the user what to do when an interrupt is received. */
|
||
|
||
static void
|
||
interrupt_query (void)
|
||
{
|
||
target_terminal_ours ();
|
||
|
||
if (query ("Interrupted while waiting for the program.\n\
|
||
Give up (and stop debugging it)? "))
|
||
{
|
||
target_mourn_inferior ();
|
||
return_to_top_level (RETURN_QUIT);
|
||
}
|
||
|
||
target_terminal_inferior ();
|
||
}
|
||
|
||
/* Enable/disable target terminal ownership. Most targets can use
|
||
terminal groups to control terminal ownership. Remote targets are
|
||
different in that explicit transfer of ownership to/from GDB/target
|
||
is required. */
|
||
|
||
static void
|
||
remote_async_terminal_inferior (void)
|
||
{
|
||
/* FIXME: cagney/1999-09-27: Shouldn't need to test for
|
||
sync_execution here. This function should only be called when
|
||
GDB is resuming the inferior in the forground. A background
|
||
resume (``run&'') should leave GDB in control of the terminal and
|
||
consequently should not call this code. */
|
||
if (!sync_execution)
|
||
return;
|
||
/* FIXME: cagney/1999-09-27: Closely related to the above. Make
|
||
calls target_terminal_*() idenpotent. The event-loop GDB talking
|
||
to an asynchronous target with a synchronous command calls this
|
||
function from both event-top.c and infrun.c/infcmd.c. Once GDB
|
||
stops trying to transfer the terminal to the target when it
|
||
shouldn't this guard can go away. */
|
||
if (!remote_async_terminal_ours_p)
|
||
return;
|
||
delete_file_handler (input_fd);
|
||
remote_async_terminal_ours_p = 0;
|
||
initialize_sigint_signal_handler ();
|
||
/* NOTE: At this point we could also register our selves as the
|
||
recipient of all input. Any characters typed could then be
|
||
passed on down to the target. */
|
||
}
|
||
|
||
static void
|
||
remote_async_terminal_ours (void)
|
||
{
|
||
/* See FIXME in remote_async_terminal_inferior. */
|
||
if (!sync_execution)
|
||
return;
|
||
/* See FIXME in remote_async_terminal_inferior. */
|
||
if (remote_async_terminal_ours_p)
|
||
return;
|
||
cleanup_sigint_signal_handler (NULL);
|
||
add_file_handler (input_fd, stdin_event_handler, 0);
|
||
remote_async_terminal_ours_p = 1;
|
||
}
|
||
|
||
/* If nonzero, ignore the next kill. */
|
||
|
||
int kill_kludge;
|
||
|
||
void
|
||
remote_console_output (char *msg)
|
||
{
|
||
char *p;
|
||
|
||
for (p = msg; p[0] && p[1]; p += 2)
|
||
{
|
||
char tb[2];
|
||
char c = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
tb[0] = c;
|
||
tb[1] = 0;
|
||
fputs_unfiltered (tb, gdb_stdtarg);
|
||
}
|
||
gdb_flush (gdb_stdtarg);
|
||
}
|
||
|
||
/* Wait until the remote machine stops, then return,
|
||
storing status in STATUS just as `wait' would.
|
||
Returns "pid", which in the case of a multi-threaded
|
||
remote OS, is the thread-id. */
|
||
|
||
static int
|
||
remote_wait (int pid, struct target_waitstatus *status)
|
||
{
|
||
unsigned char *buf = alloca (PBUFSIZ);
|
||
int thread_num = -1;
|
||
|
||
status->kind = TARGET_WAITKIND_EXITED;
|
||
status->value.integer = 0;
|
||
|
||
while (1)
|
||
{
|
||
unsigned char *p;
|
||
|
||
ofunc = signal (SIGINT, remote_interrupt);
|
||
getpkt (buf, PBUFSIZ, 1);
|
||
signal (SIGINT, ofunc);
|
||
|
||
/* This is a hook for when we need to do something (perhaps the
|
||
collection of trace data) every time the target stops. */
|
||
if (target_wait_loop_hook)
|
||
(*target_wait_loop_hook) ();
|
||
|
||
switch (buf[0])
|
||
{
|
||
case 'E': /* Error of some sort */
|
||
warning ("Remote failure reply: %s", buf);
|
||
continue;
|
||
case 'T': /* Status with PC, SP, FP, ... */
|
||
{
|
||
int i;
|
||
long regno;
|
||
char regs[MAX_REGISTER_RAW_SIZE];
|
||
|
||
/* Expedited reply, containing Signal, {regno, reg} repeat */
|
||
/* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
|
||
ss = signal number
|
||
n... = register number
|
||
r... = register contents
|
||
*/
|
||
p = &buf[3]; /* after Txx */
|
||
|
||
while (*p)
|
||
{
|
||
unsigned char *p1;
|
||
char *p_temp;
|
||
|
||
/* Read the register number */
|
||
regno = strtol ((const char *) p, &p_temp, 16);
|
||
p1 = (unsigned char *) p_temp;
|
||
|
||
if (p1 == p) /* No register number present here */
|
||
{
|
||
p1 = (unsigned char *) strchr ((const char *) p, ':');
|
||
if (p1 == NULL)
|
||
warning ("Malformed packet(a) (missing colon): %s\n\
|
||
Packet: '%s'\n",
|
||
p, buf);
|
||
if (strncmp ((const char *) p, "thread", p1 - p) == 0)
|
||
{
|
||
p_temp = unpack_varlen_hex (++p1, &thread_num);
|
||
record_currthread (thread_num);
|
||
p = (unsigned char *) p_temp;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
p = p1;
|
||
|
||
if (*p++ != ':')
|
||
warning ("Malformed packet(b) (missing colon): %s\n\
|
||
Packet: '%s'\n",
|
||
p, buf);
|
||
|
||
if (regno >= NUM_REGS)
|
||
warning ("Remote sent bad register number %ld: %s\n\
|
||
Packet: '%s'\n",
|
||
regno, p, buf);
|
||
|
||
for (i = 0; i < REGISTER_RAW_SIZE (regno); i++)
|
||
{
|
||
if (p[0] == 0 || p[1] == 0)
|
||
warning ("Remote reply is too short: %s", buf);
|
||
regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
p += 2;
|
||
}
|
||
supply_register (regno, regs);
|
||
}
|
||
|
||
if (*p++ != ';')
|
||
{
|
||
warning ("Remote register badly formatted: %s", buf);
|
||
warning (" here: %s", p);
|
||
}
|
||
}
|
||
}
|
||
/* fall through */
|
||
case 'S': /* Old style status, just signal only */
|
||
status->kind = TARGET_WAITKIND_STOPPED;
|
||
status->value.sig = (enum target_signal)
|
||
(((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
|
||
|
||
if (buf[3] == 'p')
|
||
{
|
||
/* Export Cisco kernel mode as a convenience variable
|
||
(so that it can be used in the GDB prompt if desired). */
|
||
|
||
if (cisco_kernel_mode == 1)
|
||
set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
|
||
value_from_string ("PDEBUG-"));
|
||
cisco_kernel_mode = 0;
|
||
thread_num = strtol ((const char *) &buf[4], NULL, 16);
|
||
record_currthread (thread_num);
|
||
}
|
||
else if (buf[3] == 'k')
|
||
{
|
||
/* Export Cisco kernel mode as a convenience variable
|
||
(so that it can be used in the GDB prompt if desired). */
|
||
|
||
if (cisco_kernel_mode == 1)
|
||
set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
|
||
value_from_string ("KDEBUG-"));
|
||
cisco_kernel_mode = 1;
|
||
}
|
||
goto got_status;
|
||
case 'N': /* Cisco special: status and offsets */
|
||
{
|
||
bfd_vma text_addr, data_addr, bss_addr;
|
||
bfd_signed_vma text_off, data_off, bss_off;
|
||
unsigned char *p1;
|
||
|
||
status->kind = TARGET_WAITKIND_STOPPED;
|
||
status->value.sig = (enum target_signal)
|
||
(((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
|
||
|
||
if (symfile_objfile == NULL)
|
||
{
|
||
warning ("Relocation packet received with no symbol file. \
|
||
Packet Dropped");
|
||
goto got_status;
|
||
}
|
||
|
||
/* Relocate object file. Buffer format is NAATT;DD;BB
|
||
* where AA is the signal number, TT is the new text
|
||
* address, DD * is the new data address, and BB is the
|
||
* new bss address. */
|
||
|
||
p = &buf[3];
|
||
text_addr = strtoul (p, (char **) &p1, 16);
|
||
if (p1 == p || *p1 != ';')
|
||
warning ("Malformed relocation packet: Packet '%s'", buf);
|
||
p = p1 + 1;
|
||
data_addr = strtoul (p, (char **) &p1, 16);
|
||
if (p1 == p || *p1 != ';')
|
||
warning ("Malformed relocation packet: Packet '%s'", buf);
|
||
p = p1 + 1;
|
||
bss_addr = strtoul (p, (char **) &p1, 16);
|
||
if (p1 == p)
|
||
warning ("Malformed relocation packet: Packet '%s'", buf);
|
||
|
||
if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
|
||
&text_off, &data_off, &bss_off)
|
||
== 0)
|
||
if (text_off != 0 || data_off != 0 || bss_off != 0)
|
||
remote_cisco_objfile_relocate (text_off, data_off, bss_off);
|
||
|
||
goto got_status;
|
||
}
|
||
case 'W': /* Target exited */
|
||
{
|
||
/* The remote process exited. */
|
||
status->kind = TARGET_WAITKIND_EXITED;
|
||
status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
|
||
goto got_status;
|
||
}
|
||
case 'X':
|
||
status->kind = TARGET_WAITKIND_SIGNALLED;
|
||
status->value.sig = (enum target_signal)
|
||
(((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
|
||
kill_kludge = 1;
|
||
|
||
goto got_status;
|
||
case 'O': /* Console output */
|
||
remote_console_output (buf + 1);
|
||
continue;
|
||
case '\0':
|
||
if (last_sent_signal != TARGET_SIGNAL_0)
|
||
{
|
||
/* Zero length reply means that we tried 'S' or 'C' and
|
||
the remote system doesn't support it. */
|
||
target_terminal_ours_for_output ();
|
||
printf_filtered
|
||
("Can't send signals to this remote system. %s not sent.\n",
|
||
target_signal_to_name (last_sent_signal));
|
||
last_sent_signal = TARGET_SIGNAL_0;
|
||
target_terminal_inferior ();
|
||
|
||
strcpy ((char *) buf, last_sent_step ? "s" : "c");
|
||
putpkt ((char *) buf);
|
||
continue;
|
||
}
|
||
/* else fallthrough */
|
||
default:
|
||
warning ("Invalid remote reply: %s", buf);
|
||
continue;
|
||
}
|
||
}
|
||
got_status:
|
||
if (thread_num != -1)
|
||
{
|
||
return thread_num;
|
||
}
|
||
return inferior_pid;
|
||
}
|
||
|
||
/* Async version of remote_wait. */
|
||
static int
|
||
remote_async_wait (int pid, struct target_waitstatus *status)
|
||
{
|
||
unsigned char *buf = alloca (PBUFSIZ);
|
||
int thread_num = -1;
|
||
|
||
status->kind = TARGET_WAITKIND_EXITED;
|
||
status->value.integer = 0;
|
||
|
||
while (1)
|
||
{
|
||
unsigned char *p;
|
||
|
||
if (!target_is_async_p ())
|
||
ofunc = signal (SIGINT, remote_interrupt);
|
||
/* FIXME: cagney/1999-09-27: If we're in async mode we should
|
||
_never_ wait for ever -> test on target_is_async_p().
|
||
However, before we do that we need to ensure that the caller
|
||
knows how to take the target into/out of async mode. */
|
||
getpkt (buf, PBUFSIZ, wait_forever_enabled_p);
|
||
if (!target_is_async_p ())
|
||
signal (SIGINT, ofunc);
|
||
|
||
/* This is a hook for when we need to do something (perhaps the
|
||
collection of trace data) every time the target stops. */
|
||
if (target_wait_loop_hook)
|
||
(*target_wait_loop_hook) ();
|
||
|
||
switch (buf[0])
|
||
{
|
||
case 'E': /* Error of some sort */
|
||
warning ("Remote failure reply: %s", buf);
|
||
continue;
|
||
case 'T': /* Status with PC, SP, FP, ... */
|
||
{
|
||
int i;
|
||
long regno;
|
||
char regs[MAX_REGISTER_RAW_SIZE];
|
||
|
||
/* Expedited reply, containing Signal, {regno, reg} repeat */
|
||
/* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
|
||
ss = signal number
|
||
n... = register number
|
||
r... = register contents
|
||
*/
|
||
p = &buf[3]; /* after Txx */
|
||
|
||
while (*p)
|
||
{
|
||
unsigned char *p1;
|
||
char *p_temp;
|
||
|
||
/* Read the register number */
|
||
regno = strtol ((const char *) p, &p_temp, 16);
|
||
p1 = (unsigned char *) p_temp;
|
||
|
||
if (p1 == p) /* No register number present here */
|
||
{
|
||
p1 = (unsigned char *) strchr ((const char *) p, ':');
|
||
if (p1 == NULL)
|
||
warning ("Malformed packet(a) (missing colon): %s\n\
|
||
Packet: '%s'\n",
|
||
p, buf);
|
||
if (strncmp ((const char *) p, "thread", p1 - p) == 0)
|
||
{
|
||
p_temp = unpack_varlen_hex (++p1, &thread_num);
|
||
record_currthread (thread_num);
|
||
p = (unsigned char *) p_temp;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
p = p1;
|
||
|
||
if (*p++ != ':')
|
||
warning ("Malformed packet(b) (missing colon): %s\n\
|
||
Packet: '%s'\n",
|
||
p, buf);
|
||
|
||
if (regno >= NUM_REGS)
|
||
warning ("Remote sent bad register number %ld: %s\n\
|
||
Packet: '%s'\n",
|
||
regno, p, buf);
|
||
|
||
for (i = 0; i < REGISTER_RAW_SIZE (regno); i++)
|
||
{
|
||
if (p[0] == 0 || p[1] == 0)
|
||
warning ("Remote reply is too short: %s", buf);
|
||
regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
p += 2;
|
||
}
|
||
supply_register (regno, regs);
|
||
}
|
||
|
||
if (*p++ != ';')
|
||
{
|
||
warning ("Remote register badly formatted: %s", buf);
|
||
warning (" here: %s", p);
|
||
}
|
||
}
|
||
}
|
||
/* fall through */
|
||
case 'S': /* Old style status, just signal only */
|
||
status->kind = TARGET_WAITKIND_STOPPED;
|
||
status->value.sig = (enum target_signal)
|
||
(((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
|
||
|
||
if (buf[3] == 'p')
|
||
{
|
||
/* Export Cisco kernel mode as a convenience variable
|
||
(so that it can be used in the GDB prompt if desired). */
|
||
|
||
if (cisco_kernel_mode == 1)
|
||
set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
|
||
value_from_string ("PDEBUG-"));
|
||
cisco_kernel_mode = 0;
|
||
thread_num = strtol ((const char *) &buf[4], NULL, 16);
|
||
record_currthread (thread_num);
|
||
}
|
||
else if (buf[3] == 'k')
|
||
{
|
||
/* Export Cisco kernel mode as a convenience variable
|
||
(so that it can be used in the GDB prompt if desired). */
|
||
|
||
if (cisco_kernel_mode == 1)
|
||
set_internalvar (lookup_internalvar ("cisco_kernel_mode"),
|
||
value_from_string ("KDEBUG-"));
|
||
cisco_kernel_mode = 1;
|
||
}
|
||
goto got_status;
|
||
case 'N': /* Cisco special: status and offsets */
|
||
{
|
||
bfd_vma text_addr, data_addr, bss_addr;
|
||
bfd_signed_vma text_off, data_off, bss_off;
|
||
unsigned char *p1;
|
||
|
||
status->kind = TARGET_WAITKIND_STOPPED;
|
||
status->value.sig = (enum target_signal)
|
||
(((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
|
||
|
||
if (symfile_objfile == NULL)
|
||
{
|
||
warning ("Relocation packet recieved with no symbol file. \
|
||
Packet Dropped");
|
||
goto got_status;
|
||
}
|
||
|
||
/* Relocate object file. Buffer format is NAATT;DD;BB
|
||
* where AA is the signal number, TT is the new text
|
||
* address, DD * is the new data address, and BB is the
|
||
* new bss address. */
|
||
|
||
p = &buf[3];
|
||
text_addr = strtoul (p, (char **) &p1, 16);
|
||
if (p1 == p || *p1 != ';')
|
||
warning ("Malformed relocation packet: Packet '%s'", buf);
|
||
p = p1 + 1;
|
||
data_addr = strtoul (p, (char **) &p1, 16);
|
||
if (p1 == p || *p1 != ';')
|
||
warning ("Malformed relocation packet: Packet '%s'", buf);
|
||
p = p1 + 1;
|
||
bss_addr = strtoul (p, (char **) &p1, 16);
|
||
if (p1 == p)
|
||
warning ("Malformed relocation packet: Packet '%s'", buf);
|
||
|
||
if (remote_cisco_section_offsets (text_addr, data_addr, bss_addr,
|
||
&text_off, &data_off, &bss_off)
|
||
== 0)
|
||
if (text_off != 0 || data_off != 0 || bss_off != 0)
|
||
remote_cisco_objfile_relocate (text_off, data_off, bss_off);
|
||
|
||
goto got_status;
|
||
}
|
||
case 'W': /* Target exited */
|
||
{
|
||
/* The remote process exited. */
|
||
status->kind = TARGET_WAITKIND_EXITED;
|
||
status->value.integer = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
|
||
goto got_status;
|
||
}
|
||
case 'X':
|
||
status->kind = TARGET_WAITKIND_SIGNALLED;
|
||
status->value.sig = (enum target_signal)
|
||
(((fromhex (buf[1])) << 4) + (fromhex (buf[2])));
|
||
kill_kludge = 1;
|
||
|
||
goto got_status;
|
||
case 'O': /* Console output */
|
||
remote_console_output (buf + 1);
|
||
/* Return immediately to the event loop. The event loop will
|
||
still be waiting on the inferior afterwards. */
|
||
status->kind = TARGET_WAITKIND_IGNORE;
|
||
goto got_status;
|
||
case '\0':
|
||
if (last_sent_signal != TARGET_SIGNAL_0)
|
||
{
|
||
/* Zero length reply means that we tried 'S' or 'C' and
|
||
the remote system doesn't support it. */
|
||
target_terminal_ours_for_output ();
|
||
printf_filtered
|
||
("Can't send signals to this remote system. %s not sent.\n",
|
||
target_signal_to_name (last_sent_signal));
|
||
last_sent_signal = TARGET_SIGNAL_0;
|
||
target_terminal_inferior ();
|
||
|
||
strcpy ((char *) buf, last_sent_step ? "s" : "c");
|
||
putpkt ((char *) buf);
|
||
continue;
|
||
}
|
||
/* else fallthrough */
|
||
default:
|
||
warning ("Invalid remote reply: %s", buf);
|
||
continue;
|
||
}
|
||
}
|
||
got_status:
|
||
if (thread_num != -1)
|
||
{
|
||
return thread_num;
|
||
}
|
||
return inferior_pid;
|
||
}
|
||
|
||
/* Number of bytes of registers this stub implements. */
|
||
|
||
static int register_bytes_found;
|
||
|
||
/* Read the remote registers into the block REGS. */
|
||
/* Currently we just read all the registers, so we don't use regno. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
remote_fetch_registers (int regno)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
int i;
|
||
char *p;
|
||
char *regs = alloca (REGISTER_BYTES);
|
||
|
||
set_thread (inferior_pid, 1);
|
||
|
||
sprintf (buf, "g");
|
||
remote_send (buf, PBUFSIZ);
|
||
|
||
/* Save the size of the packet sent to us by the target. Its used
|
||
as a heuristic when determining the max size of packets that the
|
||
target can safely receive. */
|
||
if (actual_register_packet_size == 0)
|
||
actual_register_packet_size = strlen (buf);
|
||
|
||
/* Unimplemented registers read as all bits zero. */
|
||
memset (regs, 0, REGISTER_BYTES);
|
||
|
||
/* We can get out of synch in various cases. If the first character
|
||
in the buffer is not a hex character, assume that has happened
|
||
and try to fetch another packet to read. */
|
||
while ((buf[0] < '0' || buf[0] > '9')
|
||
&& (buf[0] < 'a' || buf[0] > 'f')
|
||
&& buf[0] != 'x') /* New: unavailable register value */
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Bad register packet; fetching a new packet\n");
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
}
|
||
|
||
/* Reply describes registers byte by byte, each byte encoded as two
|
||
hex characters. Suck them all up, then supply them to the
|
||
register cacheing/storage mechanism. */
|
||
|
||
p = buf;
|
||
for (i = 0; i < REGISTER_BYTES; i++)
|
||
{
|
||
if (p[0] == 0)
|
||
break;
|
||
if (p[1] == 0)
|
||
{
|
||
warning ("Remote reply is of odd length: %s", buf);
|
||
/* Don't change register_bytes_found in this case, and don't
|
||
print a second warning. */
|
||
goto supply_them;
|
||
}
|
||
if (p[0] == 'x' && p[1] == 'x')
|
||
regs[i] = 0; /* 'x' */
|
||
else
|
||
regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
p += 2;
|
||
}
|
||
|
||
if (i != register_bytes_found)
|
||
{
|
||
register_bytes_found = i;
|
||
if (REGISTER_BYTES_OK_P ()
|
||
&& !REGISTER_BYTES_OK (i))
|
||
warning ("Remote reply is too short: %s", buf);
|
||
}
|
||
|
||
supply_them:
|
||
for (i = 0; i < NUM_REGS; i++)
|
||
{
|
||
supply_register (i, ®s[REGISTER_BYTE (i)]);
|
||
if (buf[REGISTER_BYTE (i) * 2] == 'x')
|
||
set_register_cached (i, -1);
|
||
}
|
||
}
|
||
|
||
/* Prepare to store registers. Since we may send them all (using a
|
||
'G' request), we have to read out the ones we don't want to change
|
||
first. */
|
||
|
||
static void
|
||
remote_prepare_to_store (void)
|
||
{
|
||
/* Make sure the entire registers array is valid. */
|
||
switch (remote_protocol_P.support)
|
||
{
|
||
case PACKET_DISABLE:
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
read_register_bytes (0, (char *) NULL, REGISTER_BYTES);
|
||
break;
|
||
case PACKET_ENABLE:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Helper: Attempt to store REGNO using the P packet. Return fail IFF
|
||
packet was not recognized. */
|
||
|
||
static int
|
||
store_register_using_P (int regno)
|
||
{
|
||
/* Try storing a single register. */
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *regp;
|
||
char *p;
|
||
int i;
|
||
|
||
sprintf (buf, "P%x=", regno);
|
||
p = buf + strlen (buf);
|
||
regp = register_buffer (regno);
|
||
for (i = 0; i < REGISTER_RAW_SIZE (regno); ++i)
|
||
{
|
||
*p++ = tohex ((regp[i] >> 4) & 0xf);
|
||
*p++ = tohex (regp[i] & 0xf);
|
||
}
|
||
*p = '\0';
|
||
remote_send (buf, PBUFSIZ);
|
||
|
||
return buf[0] != '\0';
|
||
}
|
||
|
||
|
||
/* Store register REGNO, or all registers if REGNO == -1, from the contents
|
||
of the register cache buffer. FIXME: ignores errors. */
|
||
|
||
static void
|
||
remote_store_registers (int regno)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
int i;
|
||
char *p;
|
||
char *regs;
|
||
|
||
set_thread (inferior_pid, 1);
|
||
|
||
if (regno >= 0)
|
||
{
|
||
switch (remote_protocol_P.support)
|
||
{
|
||
case PACKET_DISABLE:
|
||
break;
|
||
case PACKET_ENABLE:
|
||
if (store_register_using_P (regno))
|
||
return;
|
||
else
|
||
error ("Protocol error: P packet not recognized by stub");
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
if (store_register_using_P (regno))
|
||
{
|
||
/* The stub recognized the 'P' packet. Remember this. */
|
||
remote_protocol_P.support = PACKET_ENABLE;
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
/* The stub does not support the 'P' packet. Use 'G'
|
||
instead, and don't try using 'P' in the future (it
|
||
will just waste our time). */
|
||
remote_protocol_P.support = PACKET_DISABLE;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
buf[0] = 'G';
|
||
|
||
/* Command describes registers byte by byte,
|
||
each byte encoded as two hex characters. */
|
||
|
||
regs = register_buffer (-1);
|
||
p = buf + 1;
|
||
/* remote_prepare_to_store insures that register_bytes_found gets set. */
|
||
for (i = 0; i < register_bytes_found; i++)
|
||
{
|
||
*p++ = tohex ((regs[i] >> 4) & 0xf);
|
||
*p++ = tohex (regs[i] & 0xf);
|
||
}
|
||
*p = '\0';
|
||
|
||
remote_send (buf, PBUFSIZ);
|
||
}
|
||
|
||
|
||
/* Return the number of hex digits in num. */
|
||
|
||
static int
|
||
hexnumlen (ULONGEST num)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; num != 0; i++)
|
||
num >>= 4;
|
||
|
||
return max (i, 1);
|
||
}
|
||
|
||
/* Set BUF to the minimum number of hex digits representing NUM. */
|
||
|
||
static int
|
||
hexnumstr (char *buf, ULONGEST num)
|
||
{
|
||
int len = hexnumlen (num);
|
||
return hexnumnstr (buf, num, len);
|
||
}
|
||
|
||
|
||
/* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
|
||
|
||
static int
|
||
hexnumnstr (char *buf, ULONGEST num, int width)
|
||
{
|
||
int i;
|
||
|
||
buf[width] = '\0';
|
||
|
||
for (i = width - 1; i >= 0; i--)
|
||
{
|
||
buf[i] = "0123456789abcdef"[(num & 0xf)];
|
||
num >>= 4;
|
||
}
|
||
|
||
return width;
|
||
}
|
||
|
||
/* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
|
||
|
||
static CORE_ADDR
|
||
remote_address_masked (CORE_ADDR addr)
|
||
{
|
||
if (remote_address_size > 0
|
||
&& remote_address_size < (sizeof (ULONGEST) * 8))
|
||
{
|
||
/* Only create a mask when that mask can safely be constructed
|
||
in a ULONGEST variable. */
|
||
ULONGEST mask = 1;
|
||
mask = (mask << remote_address_size) - 1;
|
||
addr &= mask;
|
||
}
|
||
return addr;
|
||
}
|
||
|
||
/* Determine whether the remote target supports binary downloading.
|
||
This is accomplished by sending a no-op memory write of zero length
|
||
to the target at the specified address. It does not suffice to send
|
||
the whole packet, since many stubs strip the eighth bit and subsequently
|
||
compute a wrong checksum, which causes real havoc with remote_write_bytes.
|
||
|
||
NOTE: This can still lose if the serial line is not eight-bit
|
||
clean. In cases like this, the user should clear "remote
|
||
X-packet". */
|
||
|
||
static void
|
||
check_binary_download (CORE_ADDR addr)
|
||
{
|
||
switch (remote_protocol_binary_download.support)
|
||
{
|
||
case PACKET_DISABLE:
|
||
break;
|
||
case PACKET_ENABLE:
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p;
|
||
|
||
p = buf;
|
||
*p++ = 'X';
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
*p++ = ',';
|
||
p += hexnumstr (p, (ULONGEST) 0);
|
||
*p++ = ':';
|
||
*p = '\0';
|
||
|
||
putpkt_binary (buf, (int) (p - buf));
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
if (buf[0] == '\0')
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"binary downloading NOT suppported by target\n");
|
||
remote_protocol_binary_download.support = PACKET_DISABLE;
|
||
}
|
||
else
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"binary downloading suppported by target\n");
|
||
remote_protocol_binary_download.support = PACKET_ENABLE;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Write memory data directly to the remote machine.
|
||
This does not inform the data cache; the data cache uses this.
|
||
MEMADDR is the address in the remote memory space.
|
||
MYADDR is the address of the buffer in our space.
|
||
LEN is the number of bytes.
|
||
|
||
Returns number of bytes transferred, or 0 (setting errno) for
|
||
error. Only transfer a single packet. */
|
||
|
||
static int
|
||
remote_write_bytes (CORE_ADDR memaddr, char *myaddr, int len)
|
||
{
|
||
unsigned char *buf;
|
||
int max_buf_size; /* Max size of packet output buffer */
|
||
unsigned char *p;
|
||
unsigned char *plen;
|
||
long sizeof_buf;
|
||
int plenlen;
|
||
int todo;
|
||
int nr_bytes;
|
||
|
||
/* Verify that the target can support a binary download */
|
||
check_binary_download (memaddr);
|
||
|
||
/* Determine the max packet size. */
|
||
max_buf_size = get_memory_write_packet_size ();
|
||
sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */
|
||
buf = alloca (sizeof_buf);
|
||
|
||
/* Subtract header overhead from max payload size - $M<memaddr>,<len>:#nn */
|
||
max_buf_size -= 2 + hexnumlen (memaddr + len - 1) + 1 + hexnumlen (len) + 4;
|
||
|
||
/* construct "M"<memaddr>","<len>":" */
|
||
/* sprintf (buf, "M%lx,%x:", (unsigned long) memaddr, todo); */
|
||
p = buf;
|
||
|
||
/* Append [XM]. Compute a best guess of the number of bytes
|
||
actually transfered. */
|
||
switch (remote_protocol_binary_download.support)
|
||
{
|
||
case PACKET_ENABLE:
|
||
*p++ = 'X';
|
||
/* Best guess at number of bytes that will fit. */
|
||
todo = min (len, max_buf_size);
|
||
break;
|
||
case PACKET_DISABLE:
|
||
*p++ = 'M';
|
||
/* num bytes that will fit */
|
||
todo = min (len, max_buf_size / 2);
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
internal_error ("%s:%d: remote_write_bytes: bad internal state",
|
||
__FILE__, __LINE__);
|
||
default:
|
||
internal_error ("%s:%d: bad switch", __FILE__, __LINE__);
|
||
}
|
||
|
||
/* Append <memaddr> */
|
||
memaddr = remote_address_masked (memaddr);
|
||
p += hexnumstr (p, (ULONGEST) memaddr);
|
||
*p++ = ',';
|
||
|
||
/* Append <len>. Retain the location/size of <len>. It may
|
||
need to be adjusted once the packet body has been created. */
|
||
plen = p;
|
||
plenlen = hexnumstr (p, (ULONGEST) todo);
|
||
p += plenlen;
|
||
*p++ = ':';
|
||
*p = '\0';
|
||
|
||
/* Append the packet body. */
|
||
switch (remote_protocol_binary_download.support)
|
||
{
|
||
case PACKET_ENABLE:
|
||
/* Binary mode. Send target system values byte by byte, in
|
||
increasing byte addresses. Only escape certain critical
|
||
characters. */
|
||
for (nr_bytes = 0;
|
||
(nr_bytes < todo) && (p - buf) < (max_buf_size - 2);
|
||
nr_bytes++)
|
||
{
|
||
switch (myaddr[nr_bytes] & 0xff)
|
||
{
|
||
case '$':
|
||
case '#':
|
||
case 0x7d:
|
||
/* These must be escaped */
|
||
*p++ = 0x7d;
|
||
*p++ = (myaddr[nr_bytes] & 0xff) ^ 0x20;
|
||
break;
|
||
default:
|
||
*p++ = myaddr[nr_bytes] & 0xff;
|
||
break;
|
||
}
|
||
}
|
||
if (nr_bytes < todo)
|
||
{
|
||
/* Escape chars have filled up the buffer prematurely,
|
||
and we have actually sent fewer bytes than planned.
|
||
Fix-up the length field of the packet. Use the same
|
||
number of characters as before. */
|
||
|
||
plen += hexnumnstr (plen, (ULONGEST) nr_bytes, plenlen);
|
||
*plen = ':'; /* overwrite \0 from hexnumnstr() */
|
||
}
|
||
break;
|
||
case PACKET_DISABLE:
|
||
/* Normal mode: Send target system values byte by byte, in
|
||
increasing byte addresses. Each byte is encoded as a two hex
|
||
value. */
|
||
for (nr_bytes = 0; nr_bytes < todo; nr_bytes++)
|
||
{
|
||
*p++ = tohex ((myaddr[nr_bytes] >> 4) & 0xf);
|
||
*p++ = tohex (myaddr[nr_bytes] & 0xf);
|
||
}
|
||
*p = '\0';
|
||
break;
|
||
case PACKET_SUPPORT_UNKNOWN:
|
||
internal_error ("%s:%d: remote_write_bytes: bad internal state",
|
||
__FILE__, __LINE__);
|
||
default:
|
||
internal_error ("%s:%d: bad switch", __FILE__, __LINE__);
|
||
}
|
||
|
||
putpkt_binary (buf, (int) (p - buf));
|
||
getpkt (buf, sizeof_buf, 0);
|
||
|
||
if (buf[0] == 'E')
|
||
{
|
||
/* There is no correspondance between what the remote protocol
|
||
uses for errors and errno codes. We would like a cleaner way
|
||
of representing errors (big enough to include errno codes,
|
||
bfd_error codes, and others). But for now just return EIO. */
|
||
errno = EIO;
|
||
return 0;
|
||
}
|
||
|
||
/* Return NR_BYTES, not TODO, in case escape chars caused us to send fewer
|
||
bytes than we'd planned. */
|
||
return nr_bytes;
|
||
}
|
||
|
||
/* Read memory data directly from the remote machine.
|
||
This does not use the data cache; the data cache uses this.
|
||
MEMADDR is the address in the remote memory space.
|
||
MYADDR is the address of the buffer in our space.
|
||
LEN is the number of bytes.
|
||
|
||
Returns number of bytes transferred, or 0 for error. */
|
||
|
||
/* NOTE: cagney/1999-10-18: This function (and its siblings in other
|
||
remote targets) shouldn't attempt to read the entire buffer.
|
||
Instead it should read a single packet worth of data and then
|
||
return the byte size of that packet to the caller. The caller (its
|
||
caller and its callers caller ;-) already contains code for
|
||
handling partial reads. */
|
||
|
||
static int
|
||
remote_read_bytes (CORE_ADDR memaddr, char *myaddr, int len)
|
||
{
|
||
char *buf;
|
||
int max_buf_size; /* Max size of packet output buffer */
|
||
long sizeof_buf;
|
||
int origlen;
|
||
|
||
/* Create a buffer big enough for this packet. */
|
||
max_buf_size = get_memory_read_packet_size ();
|
||
sizeof_buf = max_buf_size + 1; /* Space for trailing NUL */
|
||
buf = alloca (sizeof_buf);
|
||
|
||
origlen = len;
|
||
while (len > 0)
|
||
{
|
||
char *p;
|
||
int todo;
|
||
int i;
|
||
|
||
todo = min (len, max_buf_size / 2); /* num bytes that will fit */
|
||
|
||
/* construct "m"<memaddr>","<len>" */
|
||
/* sprintf (buf, "m%lx,%x", (unsigned long) memaddr, todo); */
|
||
memaddr = remote_address_masked (memaddr);
|
||
p = buf;
|
||
*p++ = 'm';
|
||
p += hexnumstr (p, (ULONGEST) memaddr);
|
||
*p++ = ',';
|
||
p += hexnumstr (p, (ULONGEST) todo);
|
||
*p = '\0';
|
||
|
||
putpkt (buf);
|
||
getpkt (buf, sizeof_buf, 0);
|
||
|
||
if (buf[0] == 'E')
|
||
{
|
||
/* There is no correspondance between what the remote protocol uses
|
||
for errors and errno codes. We would like a cleaner way of
|
||
representing errors (big enough to include errno codes, bfd_error
|
||
codes, and others). But for now just return EIO. */
|
||
errno = EIO;
|
||
return 0;
|
||
}
|
||
|
||
/* Reply describes memory byte by byte,
|
||
each byte encoded as two hex characters. */
|
||
|
||
p = buf;
|
||
for (i = 0; i < todo; i++)
|
||
{
|
||
if (p[0] == 0 || p[1] == 0)
|
||
/* Reply is short. This means that we were able to read
|
||
only part of what we wanted to. */
|
||
return i + (origlen - len);
|
||
myaddr[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
|
||
p += 2;
|
||
}
|
||
myaddr += todo;
|
||
memaddr += todo;
|
||
len -= todo;
|
||
}
|
||
return origlen;
|
||
}
|
||
|
||
/* Read or write LEN bytes from inferior memory at MEMADDR,
|
||
transferring to or from debugger address BUFFER. Write to inferior if
|
||
SHOULD_WRITE is nonzero. Returns length of data written or read; 0
|
||
for error. TARGET is unused. */
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
remote_xfer_memory (CORE_ADDR mem_addr, char *buffer, int mem_len,
|
||
int should_write, struct target_ops *target)
|
||
{
|
||
CORE_ADDR targ_addr;
|
||
int targ_len;
|
||
int res;
|
||
|
||
REMOTE_TRANSLATE_XFER_ADDRESS (mem_addr, mem_len, &targ_addr, &targ_len);
|
||
if (targ_len <= 0)
|
||
return 0;
|
||
|
||
if (should_write)
|
||
res = remote_write_bytes (targ_addr, buffer, targ_len);
|
||
else
|
||
res = remote_read_bytes (targ_addr, buffer, targ_len);
|
||
|
||
return res;
|
||
}
|
||
|
||
|
||
#if 0
|
||
/* Enable after 4.12. */
|
||
|
||
void
|
||
remote_search (int len, char *data, char *mask, CORE_ADDR startaddr,
|
||
int increment, CORE_ADDR lorange, CORE_ADDR hirange,
|
||
CORE_ADDR *addr_found, char *data_found)
|
||
{
|
||
if (increment == -4 && len == 4)
|
||
{
|
||
long mask_long, data_long;
|
||
long data_found_long;
|
||
CORE_ADDR addr_we_found;
|
||
char *buf = alloca (PBUFSIZ);
|
||
long returned_long[2];
|
||
char *p;
|
||
|
||
mask_long = extract_unsigned_integer (mask, len);
|
||
data_long = extract_unsigned_integer (data, len);
|
||
sprintf (buf, "t%x:%x,%x", startaddr, data_long, mask_long);
|
||
putpkt (buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
if (buf[0] == '\0')
|
||
{
|
||
/* The stub doesn't support the 't' request. We might want to
|
||
remember this fact, but on the other hand the stub could be
|
||
switched on us. Maybe we should remember it only until
|
||
the next "target remote". */
|
||
generic_search (len, data, mask, startaddr, increment, lorange,
|
||
hirange, addr_found, data_found);
|
||
return;
|
||
}
|
||
|
||
if (buf[0] == 'E')
|
||
/* There is no correspondance between what the remote protocol uses
|
||
for errors and errno codes. We would like a cleaner way of
|
||
representing errors (big enough to include errno codes, bfd_error
|
||
codes, and others). But for now just use EIO. */
|
||
memory_error (EIO, startaddr);
|
||
p = buf;
|
||
addr_we_found = 0;
|
||
while (*p != '\0' && *p != ',')
|
||
addr_we_found = (addr_we_found << 4) + fromhex (*p++);
|
||
if (*p == '\0')
|
||
error ("Protocol error: short return for search");
|
||
|
||
data_found_long = 0;
|
||
while (*p != '\0' && *p != ',')
|
||
data_found_long = (data_found_long << 4) + fromhex (*p++);
|
||
/* Ignore anything after this comma, for future extensions. */
|
||
|
||
if (addr_we_found < lorange || addr_we_found >= hirange)
|
||
{
|
||
*addr_found = 0;
|
||
return;
|
||
}
|
||
|
||
*addr_found = addr_we_found;
|
||
*data_found = store_unsigned_integer (data_we_found, len);
|
||
return;
|
||
}
|
||
generic_search (len, data, mask, startaddr, increment, lorange,
|
||
hirange, addr_found, data_found);
|
||
}
|
||
#endif /* 0 */
|
||
|
||
static void
|
||
remote_files_info (struct target_ops *ignore)
|
||
{
|
||
puts_filtered ("Debugging a target over a serial line.\n");
|
||
}
|
||
|
||
/* Stuff for dealing with the packets which are part of this protocol.
|
||
See comment at top of file for details. */
|
||
|
||
/* Read a single character from the remote end, masking it down to 7 bits. */
|
||
|
||
static int
|
||
readchar (int timeout)
|
||
{
|
||
int ch;
|
||
|
||
ch = SERIAL_READCHAR (remote_desc, timeout);
|
||
|
||
if (ch >= 0)
|
||
return (ch & 0x7f);
|
||
|
||
switch ((enum serial_rc) ch)
|
||
{
|
||
case SERIAL_EOF:
|
||
target_mourn_inferior ();
|
||
error ("Remote connection closed");
|
||
/* no return */
|
||
case SERIAL_ERROR:
|
||
perror_with_name ("Remote communication error");
|
||
/* no return */
|
||
case SERIAL_TIMEOUT:
|
||
break;
|
||
}
|
||
return ch;
|
||
}
|
||
|
||
/* Send the command in BUF to the remote machine, and read the reply
|
||
into BUF. Report an error if we get an error reply. */
|
||
|
||
static void
|
||
remote_send (char *buf,
|
||
long sizeof_buf)
|
||
{
|
||
putpkt (buf);
|
||
getpkt (buf, sizeof_buf, 0);
|
||
|
||
if (buf[0] == 'E')
|
||
error ("Remote failure reply: %s", buf);
|
||
}
|
||
|
||
/* Display a null-terminated packet on stdout, for debugging, using C
|
||
string notation. */
|
||
|
||
static void
|
||
print_packet (char *buf)
|
||
{
|
||
puts_filtered ("\"");
|
||
fputstr_filtered (buf, '"', gdb_stdout);
|
||
puts_filtered ("\"");
|
||
}
|
||
|
||
int
|
||
putpkt (char *buf)
|
||
{
|
||
return putpkt_binary (buf, strlen (buf));
|
||
}
|
||
|
||
/* Send a packet to the remote machine, with error checking. The data
|
||
of the packet is in BUF. The string in BUF can be at most PBUFSIZ - 5
|
||
to account for the $, # and checksum, and for a possible /0 if we are
|
||
debugging (remote_debug) and want to print the sent packet as a string */
|
||
|
||
static int
|
||
putpkt_binary (char *buf, int cnt)
|
||
{
|
||
int i;
|
||
unsigned char csum = 0;
|
||
char *buf2 = alloca (cnt + 6);
|
||
long sizeof_junkbuf = PBUFSIZ;
|
||
char *junkbuf = alloca (sizeof_junkbuf);
|
||
|
||
int ch;
|
||
int tcount = 0;
|
||
char *p;
|
||
|
||
/* Copy the packet into buffer BUF2, encapsulating it
|
||
and giving it a checksum. */
|
||
|
||
p = buf2;
|
||
*p++ = '$';
|
||
|
||
for (i = 0; i < cnt; i++)
|
||
{
|
||
csum += buf[i];
|
||
*p++ = buf[i];
|
||
}
|
||
*p++ = '#';
|
||
*p++ = tohex ((csum >> 4) & 0xf);
|
||
*p++ = tohex (csum & 0xf);
|
||
|
||
/* Send it over and over until we get a positive ack. */
|
||
|
||
while (1)
|
||
{
|
||
int started_error_output = 0;
|
||
|
||
if (remote_debug)
|
||
{
|
||
*p = '\0';
|
||
fprintf_unfiltered (gdb_stdlog, "Sending packet: ");
|
||
fputstrn_unfiltered (buf2, p - buf2, 0, gdb_stdlog);
|
||
fprintf_unfiltered (gdb_stdlog, "...");
|
||
gdb_flush (gdb_stdlog);
|
||
}
|
||
if (SERIAL_WRITE (remote_desc, buf2, p - buf2))
|
||
perror_with_name ("putpkt: write failed");
|
||
|
||
/* read until either a timeout occurs (-2) or '+' is read */
|
||
while (1)
|
||
{
|
||
ch = readchar (remote_timeout);
|
||
|
||
if (remote_debug)
|
||
{
|
||
switch (ch)
|
||
{
|
||
case '+':
|
||
case '-':
|
||
case SERIAL_TIMEOUT:
|
||
case '$':
|
||
if (started_error_output)
|
||
{
|
||
putchar_unfiltered ('\n');
|
||
started_error_output = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
switch (ch)
|
||
{
|
||
case '+':
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "Ack\n");
|
||
return 1;
|
||
case '-':
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "Nak\n");
|
||
case SERIAL_TIMEOUT:
|
||
tcount++;
|
||
if (tcount > 3)
|
||
return 0;
|
||
break; /* Retransmit buffer */
|
||
case '$':
|
||
{
|
||
if (remote_debug)
|
||
fprintf_unfiltered (gdb_stdlog, "Packet instead of Ack, ignoring it\n");
|
||
/* It's probably an old response, and we're out of sync.
|
||
Just gobble up the packet and ignore it. */
|
||
read_frame (junkbuf, sizeof_junkbuf);
|
||
continue; /* Now, go look for + */
|
||
}
|
||
default:
|
||
if (remote_debug)
|
||
{
|
||
if (!started_error_output)
|
||
{
|
||
started_error_output = 1;
|
||
fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
|
||
}
|
||
fputc_unfiltered (ch & 0177, gdb_stdlog);
|
||
}
|
||
continue;
|
||
}
|
||
break; /* Here to retransmit */
|
||
}
|
||
|
||
#if 0
|
||
/* This is wrong. If doing a long backtrace, the user should be
|
||
able to get out next time we call QUIT, without anything as
|
||
violent as interrupt_query. If we want to provide a way out of
|
||
here without getting to the next QUIT, it should be based on
|
||
hitting ^C twice as in remote_wait. */
|
||
if (quit_flag)
|
||
{
|
||
quit_flag = 0;
|
||
interrupt_query ();
|
||
}
|
||
#endif
|
||
}
|
||
}
|
||
|
||
static int remote_cisco_mode;
|
||
|
||
/* Come here after finding the start of the frame. Collect the rest
|
||
into BUF, verifying the checksum, length, and handling run-length
|
||
compression. No more than sizeof_buf-1 characters are read so that
|
||
the buffer can be NUL terminated.
|
||
|
||
Returns -1 on error, number of characters in buffer (ignoring the
|
||
trailing NULL) on success. (could be extended to return one of the
|
||
SERIAL status indications). */
|
||
|
||
static long
|
||
read_frame (char *buf,
|
||
long sizeof_buf)
|
||
{
|
||
unsigned char csum;
|
||
long bc;
|
||
int c;
|
||
|
||
csum = 0;
|
||
bc = 0;
|
||
|
||
while (1)
|
||
{
|
||
/* ASSERT (bc < sizeof_buf - 1) - space for trailing NUL */
|
||
c = readchar (remote_timeout);
|
||
switch (c)
|
||
{
|
||
case SERIAL_TIMEOUT:
|
||
if (remote_debug)
|
||
fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
|
||
return -1;
|
||
case '$':
|
||
if (remote_debug)
|
||
fputs_filtered ("Saw new packet start in middle of old one\n",
|
||
gdb_stdlog);
|
||
return -1; /* Start a new packet, count retries */
|
||
case '#':
|
||
{
|
||
unsigned char pktcsum;
|
||
int check_0 = 0;
|
||
int check_1 = 0;
|
||
|
||
buf[bc] = '\0';
|
||
|
||
check_0 = readchar (remote_timeout);
|
||
if (check_0 >= 0)
|
||
check_1 = readchar (remote_timeout);
|
||
|
||
if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
|
||
{
|
||
if (remote_debug)
|
||
fputs_filtered ("Timeout in checksum, retrying\n", gdb_stdlog);
|
||
return -1;
|
||
}
|
||
else if (check_0 < 0 || check_1 < 0)
|
||
{
|
||
if (remote_debug)
|
||
fputs_filtered ("Communication error in checksum\n", gdb_stdlog);
|
||
return -1;
|
||
}
|
||
|
||
pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
|
||
if (csum == pktcsum)
|
||
return bc;
|
||
|
||
if (remote_debug)
|
||
{
|
||
fprintf_filtered (gdb_stdlog,
|
||
"Bad checksum, sentsum=0x%x, csum=0x%x, buf=",
|
||
pktcsum, csum);
|
||
fputs_filtered (buf, gdb_stdlog);
|
||
fputs_filtered ("\n", gdb_stdlog);
|
||
}
|
||
/* Number of characters in buffer ignoring trailing
|
||
NUL. */
|
||
return -1;
|
||
}
|
||
case '*': /* Run length encoding */
|
||
{
|
||
int repeat;
|
||
csum += c;
|
||
|
||
if (remote_cisco_mode == 0)
|
||
{
|
||
c = readchar (remote_timeout);
|
||
csum += c;
|
||
repeat = c - ' ' + 3; /* Compute repeat count */
|
||
}
|
||
else
|
||
{
|
||
/* Cisco's run-length encoding variant uses two
|
||
hex chars to represent the repeat count. */
|
||
|
||
c = readchar (remote_timeout);
|
||
csum += c;
|
||
repeat = fromhex (c) << 4;
|
||
c = readchar (remote_timeout);
|
||
csum += c;
|
||
repeat += fromhex (c);
|
||
}
|
||
|
||
/* The character before ``*'' is repeated. */
|
||
|
||
if (repeat > 0 && repeat <= 255
|
||
&& bc > 0
|
||
&& bc + repeat < sizeof_buf - 1)
|
||
{
|
||
memset (&buf[bc], buf[bc - 1], repeat);
|
||
bc += repeat;
|
||
continue;
|
||
}
|
||
|
||
buf[bc] = '\0';
|
||
printf_filtered ("Repeat count %d too large for buffer: ", repeat);
|
||
puts_filtered (buf);
|
||
puts_filtered ("\n");
|
||
return -1;
|
||
}
|
||
default:
|
||
if (bc < sizeof_buf - 1)
|
||
{
|
||
buf[bc++] = c;
|
||
csum += c;
|
||
continue;
|
||
}
|
||
|
||
buf[bc] = '\0';
|
||
puts_filtered ("Remote packet too long: ");
|
||
puts_filtered (buf);
|
||
puts_filtered ("\n");
|
||
|
||
return -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Read a packet from the remote machine, with error checking, and
|
||
store it in BUF. If FOREVER, wait forever rather than timing out;
|
||
this is used (in synchronous mode) to wait for a target that is is
|
||
executing user code to stop. */
|
||
/* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
|
||
don't have to change all the calls to getpkt to deal with the
|
||
return value, because at the moment I don't know what the right
|
||
thing to do it for those. */
|
||
void
|
||
getpkt (char *buf,
|
||
long sizeof_buf,
|
||
int forever)
|
||
{
|
||
int timed_out;
|
||
|
||
timed_out = getpkt_sane (buf, sizeof_buf, forever);
|
||
}
|
||
|
||
|
||
/* Read a packet from the remote machine, with error checking, and
|
||
store it in BUF. If FOREVER, wait forever rather than timing out;
|
||
this is used (in synchronous mode) to wait for a target that is is
|
||
executing user code to stop. If FOREVER == 0, this function is
|
||
allowed to time out gracefully and return an indication of this to
|
||
the caller. */
|
||
int
|
||
getpkt_sane (char *buf,
|
||
long sizeof_buf,
|
||
int forever)
|
||
{
|
||
int c;
|
||
int tries;
|
||
int timeout;
|
||
int val;
|
||
|
||
strcpy (buf, "timeout");
|
||
|
||
if (forever)
|
||
{
|
||
timeout = watchdog > 0 ? watchdog : -1;
|
||
}
|
||
|
||
else
|
||
timeout = remote_timeout;
|
||
|
||
#define MAX_TRIES 3
|
||
|
||
for (tries = 1; tries <= MAX_TRIES; tries++)
|
||
{
|
||
/* This can loop forever if the remote side sends us characters
|
||
continuously, but if it pauses, we'll get a zero from readchar
|
||
because of timeout. Then we'll count that as a retry. */
|
||
|
||
/* Note that we will only wait forever prior to the start of a packet.
|
||
After that, we expect characters to arrive at a brisk pace. They
|
||
should show up within remote_timeout intervals. */
|
||
|
||
do
|
||
{
|
||
c = readchar (timeout);
|
||
|
||
if (c == SERIAL_TIMEOUT)
|
||
{
|
||
if (forever) /* Watchdog went off? Kill the target. */
|
||
{
|
||
QUIT;
|
||
target_mourn_inferior ();
|
||
error ("Watchdog has expired. Target detached.\n");
|
||
}
|
||
if (remote_debug)
|
||
fputs_filtered ("Timed out.\n", gdb_stdlog);
|
||
goto retry;
|
||
}
|
||
}
|
||
while (c != '$');
|
||
|
||
/* We've found the start of a packet, now collect the data. */
|
||
|
||
val = read_frame (buf, sizeof_buf);
|
||
|
||
if (val >= 0)
|
||
{
|
||
if (remote_debug)
|
||
{
|
||
fprintf_unfiltered (gdb_stdlog, "Packet received: ");
|
||
fputstr_unfiltered (buf, 0, gdb_stdlog);
|
||
fprintf_unfiltered (gdb_stdlog, "\n");
|
||
}
|
||
SERIAL_WRITE (remote_desc, "+", 1);
|
||
return 0;
|
||
}
|
||
|
||
/* Try the whole thing again. */
|
||
retry:
|
||
SERIAL_WRITE (remote_desc, "-", 1);
|
||
}
|
||
|
||
/* We have tried hard enough, and just can't receive the packet. Give up. */
|
||
|
||
printf_unfiltered ("Ignoring packet error, continuing...\n");
|
||
SERIAL_WRITE (remote_desc, "+", 1);
|
||
return 1;
|
||
}
|
||
|
||
static void
|
||
remote_kill (void)
|
||
{
|
||
/* For some mysterious reason, wait_for_inferior calls kill instead of
|
||
mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
|
||
if (kill_kludge)
|
||
{
|
||
kill_kludge = 0;
|
||
target_mourn_inferior ();
|
||
return;
|
||
}
|
||
|
||
/* Use catch_errors so the user can quit from gdb even when we aren't on
|
||
speaking terms with the remote system. */
|
||
catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
|
||
|
||
/* Don't wait for it to die. I'm not really sure it matters whether
|
||
we do or not. For the existing stubs, kill is a noop. */
|
||
target_mourn_inferior ();
|
||
}
|
||
|
||
/* Async version of remote_kill. */
|
||
static void
|
||
remote_async_kill (void)
|
||
{
|
||
/* Unregister the file descriptor from the event loop. */
|
||
if (target_is_async_p ())
|
||
SERIAL_ASYNC (remote_desc, NULL, 0);
|
||
|
||
/* For some mysterious reason, wait_for_inferior calls kill instead of
|
||
mourn after it gets TARGET_WAITKIND_SIGNALLED. Work around it. */
|
||
if (kill_kludge)
|
||
{
|
||
kill_kludge = 0;
|
||
target_mourn_inferior ();
|
||
return;
|
||
}
|
||
|
||
/* Use catch_errors so the user can quit from gdb even when we aren't on
|
||
speaking terms with the remote system. */
|
||
catch_errors ((catch_errors_ftype *) putpkt, "k", "", RETURN_MASK_ERROR);
|
||
|
||
/* Don't wait for it to die. I'm not really sure it matters whether
|
||
we do or not. For the existing stubs, kill is a noop. */
|
||
target_mourn_inferior ();
|
||
}
|
||
|
||
static void
|
||
remote_mourn (void)
|
||
{
|
||
remote_mourn_1 (&remote_ops);
|
||
}
|
||
|
||
static void
|
||
remote_async_mourn (void)
|
||
{
|
||
remote_mourn_1 (&remote_async_ops);
|
||
}
|
||
|
||
static void
|
||
extended_remote_mourn (void)
|
||
{
|
||
/* We do _not_ want to mourn the target like this; this will
|
||
remove the extended remote target from the target stack,
|
||
and the next time the user says "run" it'll fail.
|
||
|
||
FIXME: What is the right thing to do here? */
|
||
#if 0
|
||
remote_mourn_1 (&extended_remote_ops);
|
||
#endif
|
||
}
|
||
|
||
/* Worker function for remote_mourn. */
|
||
static void
|
||
remote_mourn_1 (struct target_ops *target)
|
||
{
|
||
unpush_target (target);
|
||
generic_mourn_inferior ();
|
||
}
|
||
|
||
/* In the extended protocol we want to be able to do things like
|
||
"run" and have them basically work as expected. So we need
|
||
a special create_inferior function.
|
||
|
||
FIXME: One day add support for changing the exec file
|
||
we're debugging, arguments and an environment. */
|
||
|
||
static void
|
||
extended_remote_create_inferior (char *exec_file, char *args, char **env)
|
||
{
|
||
/* Rip out the breakpoints; we'll reinsert them after restarting
|
||
the remote server. */
|
||
remove_breakpoints ();
|
||
|
||
/* Now restart the remote server. */
|
||
extended_remote_restart ();
|
||
|
||
/* Now put the breakpoints back in. This way we're safe if the
|
||
restart function works via a unix fork on the remote side. */
|
||
insert_breakpoints ();
|
||
|
||
/* Clean up from the last time we were running. */
|
||
clear_proceed_status ();
|
||
|
||
/* Let the remote process run. */
|
||
proceed (-1, TARGET_SIGNAL_0, 0);
|
||
}
|
||
|
||
/* Async version of extended_remote_create_inferior. */
|
||
static void
|
||
extended_remote_async_create_inferior (char *exec_file, char *args, char **env)
|
||
{
|
||
/* Rip out the breakpoints; we'll reinsert them after restarting
|
||
the remote server. */
|
||
remove_breakpoints ();
|
||
|
||
/* If running asynchronously, register the target file descriptor
|
||
with the event loop. */
|
||
if (event_loop_p && target_can_async_p ())
|
||
target_async (inferior_event_handler, 0);
|
||
|
||
/* Now restart the remote server. */
|
||
extended_remote_restart ();
|
||
|
||
/* Now put the breakpoints back in. This way we're safe if the
|
||
restart function works via a unix fork on the remote side. */
|
||
insert_breakpoints ();
|
||
|
||
/* Clean up from the last time we were running. */
|
||
clear_proceed_status ();
|
||
|
||
/* Let the remote process run. */
|
||
proceed (-1, TARGET_SIGNAL_0, 0);
|
||
}
|
||
|
||
|
||
/* On some machines, e.g. 68k, we may use a different breakpoint instruction
|
||
than other targets; in those use REMOTE_BREAKPOINT instead of just
|
||
BREAKPOINT. Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
|
||
and BIG_REMOTE_BREAKPOINT. If none of these are defined, we just call
|
||
the standard routines that are in mem-break.c. */
|
||
|
||
/* FIXME, these ought to be done in a more dynamic fashion. For instance,
|
||
the choice of breakpoint instruction affects target program design and
|
||
vice versa, and by making it user-tweakable, the special code here
|
||
goes away and we need fewer special GDB configurations. */
|
||
|
||
#if defined (LITTLE_REMOTE_BREAKPOINT) && defined (BIG_REMOTE_BREAKPOINT) && !defined(REMOTE_BREAKPOINT)
|
||
#define REMOTE_BREAKPOINT
|
||
#endif
|
||
|
||
#ifdef REMOTE_BREAKPOINT
|
||
|
||
/* If the target isn't bi-endian, just pretend it is. */
|
||
#if !defined (LITTLE_REMOTE_BREAKPOINT) && !defined (BIG_REMOTE_BREAKPOINT)
|
||
#define LITTLE_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
|
||
#define BIG_REMOTE_BREAKPOINT REMOTE_BREAKPOINT
|
||
#endif
|
||
|
||
static unsigned char big_break_insn[] = BIG_REMOTE_BREAKPOINT;
|
||
static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT;
|
||
|
||
#endif /* REMOTE_BREAKPOINT */
|
||
|
||
/* Insert a breakpoint on targets that don't have any better breakpoint
|
||
support. We read the contents of the target location and stash it,
|
||
then overwrite it with a breakpoint instruction. ADDR is the target
|
||
location in the target machine. CONTENTS_CACHE is a pointer to
|
||
memory allocated for saving the target contents. It is guaranteed
|
||
by the caller to be long enough to save sizeof BREAKPOINT bytes (this
|
||
is accomplished via BREAKPOINT_MAX). */
|
||
|
||
static int
|
||
remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
|
||
{
|
||
#ifdef REMOTE_BREAKPOINT
|
||
int val;
|
||
#endif
|
||
int bp_size;
|
||
|
||
/* Try the "Z" s/w breakpoint packet if it is not already disabled.
|
||
If it succeeds, then set the support to PACKET_ENABLE. If it
|
||
fails, and the user has explicitly requested the Z support then
|
||
report an error, otherwise, mark it disabled and go on. */
|
||
|
||
if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p = buf;
|
||
|
||
addr = remote_address_masked (addr);
|
||
*(p++) = 'Z';
|
||
*(p++) = '0';
|
||
*(p++) = ',';
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
BREAKPOINT_FROM_PC (&addr, &bp_size);
|
||
sprintf (p, ",%d", bp_size);
|
||
|
||
putpkt (buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_SOFTWARE_BP]))
|
||
{
|
||
case PACKET_ERROR:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
case PACKET_UNKNOWN:
|
||
break;
|
||
}
|
||
}
|
||
|
||
#ifdef REMOTE_BREAKPOINT
|
||
val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
|
||
|
||
if (val == 0)
|
||
{
|
||
if (TARGET_BYTE_ORDER == BIG_ENDIAN)
|
||
val = target_write_memory (addr, (char *) big_break_insn,
|
||
sizeof big_break_insn);
|
||
else
|
||
val = target_write_memory (addr, (char *) little_break_insn,
|
||
sizeof little_break_insn);
|
||
}
|
||
|
||
return val;
|
||
#else
|
||
return memory_insert_breakpoint (addr, contents_cache);
|
||
#endif /* REMOTE_BREAKPOINT */
|
||
}
|
||
|
||
static int
|
||
remote_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
|
||
{
|
||
int bp_size;
|
||
|
||
if (remote_protocol_Z[Z_PACKET_SOFTWARE_BP].support != PACKET_DISABLE)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p = buf;
|
||
|
||
*(p++) = 'z';
|
||
*(p++) = '0';
|
||
*(p++) = ',';
|
||
|
||
addr = remote_address_masked (addr);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
BREAKPOINT_FROM_PC (&addr, &bp_size);
|
||
sprintf (p, ",%d", bp_size);
|
||
|
||
putpkt (buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
return (buf[0] == 'E');
|
||
}
|
||
|
||
#ifdef REMOTE_BREAKPOINT
|
||
return target_write_memory (addr, contents_cache, sizeof big_break_insn);
|
||
#else
|
||
return memory_remove_breakpoint (addr, contents_cache);
|
||
#endif /* REMOTE_BREAKPOINT */
|
||
}
|
||
|
||
static int
|
||
watchpoint_to_Z_packet (int type)
|
||
{
|
||
switch (type)
|
||
{
|
||
case hw_write:
|
||
return 2;
|
||
break;
|
||
case hw_read:
|
||
return 3;
|
||
break;
|
||
case hw_access:
|
||
return 4;
|
||
break;
|
||
default:
|
||
internal_error ("hw_bp_to_z: bad watchpoint type %d", type);
|
||
}
|
||
}
|
||
|
||
/* FIXME: This function should be static and a member of the remote
|
||
target vector. */
|
||
|
||
int
|
||
remote_insert_watchpoint (CORE_ADDR addr, int len, int type)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p;
|
||
enum Z_packet_type packet = watchpoint_to_Z_packet (type);
|
||
|
||
if (remote_protocol_Z[packet].support == PACKET_DISABLE)
|
||
error ("Can't set hardware watchpoints without the '%s' (%s) packet\n",
|
||
remote_protocol_Z[packet].name,
|
||
remote_protocol_Z[packet].title);
|
||
|
||
sprintf (buf, "Z%x,", packet);
|
||
p = strchr (buf, '\0');
|
||
addr = remote_address_masked (addr);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", len);
|
||
|
||
putpkt (buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
switch (packet_ok (buf, &remote_protocol_Z[packet]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error ("remote_insert_watchpoint: reached end of function");
|
||
}
|
||
|
||
/* FIXME: This function should be static and a member of the remote
|
||
target vector. */
|
||
|
||
int
|
||
remote_remove_watchpoint (CORE_ADDR addr, int len, int type)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p;
|
||
enum Z_packet_type packet = watchpoint_to_Z_packet (type);
|
||
|
||
if (remote_protocol_Z[packet].support == PACKET_DISABLE)
|
||
error ("Can't clear hardware watchpoints without the '%s' (%s) packet\n",
|
||
remote_protocol_Z[packet].name,
|
||
remote_protocol_Z[packet].title);
|
||
|
||
sprintf (buf, "z%x,", packet);
|
||
p = strchr (buf, '\0');
|
||
addr = remote_address_masked (addr);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", len);
|
||
putpkt (buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
switch (packet_ok (buf, &remote_protocol_Z[packet]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error ("remote_remove_watchpoint: reached end of function");
|
||
}
|
||
|
||
/* FIXME: This function should be static and a member of the remote
|
||
target vector. */
|
||
|
||
int
|
||
remote_insert_hw_breakpoint (CORE_ADDR addr, int len)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p = buf;
|
||
|
||
if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
|
||
error ("Can't set hardware breakpoint without the '%s' (%s) packet\n",
|
||
remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
|
||
remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
|
||
|
||
*(p++) = 'Z';
|
||
*(p++) = '1';
|
||
*(p++) = ',';
|
||
|
||
addr = remote_address_masked (addr);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", len);
|
||
|
||
putpkt (buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error ("remote_remove_watchpoint: reached end of function");
|
||
}
|
||
|
||
/* FIXME: This function should be static and a member of the remote
|
||
target vector. */
|
||
|
||
int
|
||
remote_remove_hw_breakpoint (CORE_ADDR addr, int len)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p = buf;
|
||
|
||
if (remote_protocol_Z[Z_PACKET_HARDWARE_BP].support == PACKET_DISABLE)
|
||
error ("Can't clear hardware breakpoint without the '%s' (%s) packet\n",
|
||
remote_protocol_Z[Z_PACKET_HARDWARE_BP].name,
|
||
remote_protocol_Z[Z_PACKET_HARDWARE_BP].title);
|
||
|
||
*(p++) = 'z';
|
||
*(p++) = '1';
|
||
*(p++) = ',';
|
||
|
||
addr = remote_address_masked (addr);
|
||
p += hexnumstr (p, (ULONGEST) addr);
|
||
sprintf (p, ",%x", len);
|
||
|
||
putpkt(buf);
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
|
||
switch (packet_ok (buf, &remote_protocol_Z[Z_PACKET_HARDWARE_BP]))
|
||
{
|
||
case PACKET_ERROR:
|
||
case PACKET_UNKNOWN:
|
||
return -1;
|
||
case PACKET_OK:
|
||
return 0;
|
||
}
|
||
internal_error ("remote_remove_watchpoint: reached end of function");
|
||
}
|
||
|
||
/* Some targets are only capable of doing downloads, and afterwards
|
||
they switch to the remote serial protocol. This function provides
|
||
a clean way to get from the download target to the remote target.
|
||
It's basically just a wrapper so that we don't have to expose any
|
||
of the internal workings of remote.c.
|
||
|
||
Prior to calling this routine, you should shutdown the current
|
||
target code, else you will get the "A program is being debugged
|
||
already..." message. Usually a call to pop_target() suffices. */
|
||
|
||
void
|
||
push_remote_target (char *name, int from_tty)
|
||
{
|
||
printf_filtered ("Switching to remote protocol\n");
|
||
remote_open (name, from_tty);
|
||
}
|
||
|
||
/* Other targets want to use the entire remote serial module but with
|
||
certain remote_ops overridden. */
|
||
|
||
void
|
||
open_remote_target (char *name, int from_tty, struct target_ops *target,
|
||
int extended_p)
|
||
{
|
||
printf_filtered ("Selecting the %sremote protocol\n",
|
||
(extended_p ? "extended-" : ""));
|
||
remote_open_1 (name, from_tty, target, extended_p);
|
||
}
|
||
|
||
/* Table used by the crc32 function to calcuate the checksum. */
|
||
|
||
static unsigned long crc32_table[256] =
|
||
{0, 0};
|
||
|
||
static unsigned long
|
||
crc32 (unsigned char *buf, int len, unsigned int crc)
|
||
{
|
||
if (!crc32_table[1])
|
||
{
|
||
/* Initialize the CRC table and the decoding table. */
|
||
int i, j;
|
||
unsigned int c;
|
||
|
||
for (i = 0; i < 256; i++)
|
||
{
|
||
for (c = i << 24, j = 8; j > 0; --j)
|
||
c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
|
||
crc32_table[i] = c;
|
||
}
|
||
}
|
||
|
||
while (len--)
|
||
{
|
||
crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
|
||
buf++;
|
||
}
|
||
return crc;
|
||
}
|
||
|
||
/* compare-sections command
|
||
|
||
With no arguments, compares each loadable section in the exec bfd
|
||
with the same memory range on the target, and reports mismatches.
|
||
Useful for verifying the image on the target against the exec file.
|
||
Depends on the target understanding the new "qCRC:" request. */
|
||
|
||
/* FIXME: cagney/1999-10-26: This command should be broken down into a
|
||
target method (target verify memory) and generic version of the
|
||
actual command. This will allow other high-level code (especially
|
||
generic_load()) to make use of this target functionality. */
|
||
|
||
static void
|
||
compare_sections_command (char *args, int from_tty)
|
||
{
|
||
asection *s;
|
||
unsigned long host_crc, target_crc;
|
||
extern bfd *exec_bfd;
|
||
struct cleanup *old_chain;
|
||
char *tmp;
|
||
char *sectdata;
|
||
char *sectname;
|
||
char *buf = alloca (PBUFSIZ);
|
||
bfd_size_type size;
|
||
bfd_vma lma;
|
||
int matched = 0;
|
||
int mismatched = 0;
|
||
|
||
if (!exec_bfd)
|
||
error ("command cannot be used without an exec file");
|
||
if (!current_target.to_shortname ||
|
||
strcmp (current_target.to_shortname, "remote") != 0)
|
||
error ("command can only be used with remote target");
|
||
|
||
for (s = exec_bfd->sections; s; s = s->next)
|
||
{
|
||
if (!(s->flags & SEC_LOAD))
|
||
continue; /* skip non-loadable section */
|
||
|
||
size = bfd_get_section_size_before_reloc (s);
|
||
if (size == 0)
|
||
continue; /* skip zero-length section */
|
||
|
||
sectname = (char *) bfd_get_section_name (exec_bfd, s);
|
||
if (args && strcmp (args, sectname) != 0)
|
||
continue; /* not the section selected by user */
|
||
|
||
matched = 1; /* do this section */
|
||
lma = s->lma;
|
||
/* FIXME: assumes lma can fit into long */
|
||
sprintf (buf, "qCRC:%lx,%lx", (long) lma, (long) size);
|
||
putpkt (buf);
|
||
|
||
/* be clever; compute the host_crc before waiting for target reply */
|
||
sectdata = xmalloc (size);
|
||
old_chain = make_cleanup (xfree, sectdata);
|
||
bfd_get_section_contents (exec_bfd, s, sectdata, 0, size);
|
||
host_crc = crc32 ((unsigned char *) sectdata, size, 0xffffffff);
|
||
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
if (buf[0] == 'E')
|
||
error ("target memory fault, section %s, range 0x%08x -- 0x%08x",
|
||
sectname, lma, lma + size);
|
||
if (buf[0] != 'C')
|
||
error ("remote target does not support this operation");
|
||
|
||
for (target_crc = 0, tmp = &buf[1]; *tmp; tmp++)
|
||
target_crc = target_crc * 16 + fromhex (*tmp);
|
||
|
||
printf_filtered ("Section %s, range 0x%s -- 0x%s: ",
|
||
sectname, paddr (lma), paddr (lma + size));
|
||
if (host_crc == target_crc)
|
||
printf_filtered ("matched.\n");
|
||
else
|
||
{
|
||
printf_filtered ("MIS-MATCHED!\n");
|
||
mismatched++;
|
||
}
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
if (mismatched > 0)
|
||
warning ("One or more sections of the remote executable does not match\n\
|
||
the loaded file\n");
|
||
if (args && !matched)
|
||
printf_filtered ("No loaded section named '%s'.\n", args);
|
||
}
|
||
|
||
static int
|
||
remote_query (int query_type, char *buf, char *outbuf, int *bufsiz)
|
||
{
|
||
int i;
|
||
char *buf2 = alloca (PBUFSIZ);
|
||
char *p2 = &buf2[0];
|
||
|
||
if (!bufsiz)
|
||
error ("null pointer to remote bufer size specified");
|
||
|
||
/* minimum outbuf size is PBUFSIZ - if bufsiz is not large enough let
|
||
the caller know and return what the minimum size is */
|
||
/* Note: a zero bufsiz can be used to query the minimum buffer size */
|
||
if (*bufsiz < PBUFSIZ)
|
||
{
|
||
*bufsiz = PBUFSIZ;
|
||
return -1;
|
||
}
|
||
|
||
/* except for querying the minimum buffer size, target must be open */
|
||
if (!remote_desc)
|
||
error ("remote query is only available after target open");
|
||
|
||
/* we only take uppercase letters as query types, at least for now */
|
||
if ((query_type < 'A') || (query_type > 'Z'))
|
||
error ("invalid remote query type");
|
||
|
||
if (!buf)
|
||
error ("null remote query specified");
|
||
|
||
if (!outbuf)
|
||
error ("remote query requires a buffer to receive data");
|
||
|
||
outbuf[0] = '\0';
|
||
|
||
*p2++ = 'q';
|
||
*p2++ = query_type;
|
||
|
||
/* we used one buffer char for the remote protocol q command and another
|
||
for the query type. As the remote protocol encapsulation uses 4 chars
|
||
plus one extra in case we are debugging (remote_debug),
|
||
we have PBUFZIZ - 7 left to pack the query string */
|
||
i = 0;
|
||
while (buf[i] && (i < (PBUFSIZ - 8)))
|
||
{
|
||
/* bad caller may have sent forbidden characters */
|
||
if ((!isprint (buf[i])) || (buf[i] == '$') || (buf[i] == '#'))
|
||
error ("illegal characters in query string");
|
||
|
||
*p2++ = buf[i];
|
||
i++;
|
||
}
|
||
*p2 = buf[i];
|
||
|
||
if (buf[i])
|
||
error ("query larger than available buffer");
|
||
|
||
i = putpkt (buf2);
|
||
if (i < 0)
|
||
return i;
|
||
|
||
getpkt (outbuf, *bufsiz, 0);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
remote_rcmd (char *command,
|
||
struct ui_file *outbuf)
|
||
{
|
||
int i;
|
||
char *buf = alloca (PBUFSIZ);
|
||
char *p = buf;
|
||
|
||
if (!remote_desc)
|
||
error ("remote rcmd is only available after target open");
|
||
|
||
/* Send a NULL command across as an empty command */
|
||
if (command == NULL)
|
||
command = "";
|
||
|
||
/* The query prefix */
|
||
strcpy (buf, "qRcmd,");
|
||
p = strchr (buf, '\0');
|
||
|
||
if ((strlen (buf) + strlen (command) * 2 + 8/*misc*/) > PBUFSIZ)
|
||
error ("\"monitor\" command ``%s'' is too long\n", command);
|
||
|
||
/* Encode the actual command */
|
||
for (i = 0; command[i]; i++)
|
||
{
|
||
*p++ = tohex ((command[i] >> 4) & 0xf);
|
||
*p++ = tohex (command[i] & 0xf);
|
||
}
|
||
*p = '\0';
|
||
|
||
if (putpkt (buf) < 0)
|
||
error ("Communication problem with target\n");
|
||
|
||
/* get/display the response */
|
||
while (1)
|
||
{
|
||
/* XXX - see also tracepoint.c:remote_get_noisy_reply() */
|
||
buf[0] = '\0';
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
if (buf[0] == '\0')
|
||
error ("Target does not support this command\n");
|
||
if (buf[0] == 'O' && buf[1] != 'K')
|
||
{
|
||
remote_console_output (buf + 1); /* 'O' message from stub */
|
||
continue;
|
||
}
|
||
if (strcmp (buf, "OK") == 0)
|
||
break;
|
||
if (strlen (buf) == 3 && buf[0] == 'E'
|
||
&& isdigit (buf[1]) && isdigit (buf[2]))
|
||
{
|
||
error ("Protocol error with Rcmd");
|
||
}
|
||
for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
|
||
{
|
||
char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
|
||
fputc_unfiltered (c, outbuf);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
packet_command (char *args, int from_tty)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
if (!remote_desc)
|
||
error ("command can only be used with remote target");
|
||
|
||
if (!args)
|
||
error ("remote-packet command requires packet text as argument");
|
||
|
||
puts_filtered ("sending: ");
|
||
print_packet (args);
|
||
puts_filtered ("\n");
|
||
putpkt (args);
|
||
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
puts_filtered ("received: ");
|
||
print_packet (buf);
|
||
puts_filtered ("\n");
|
||
}
|
||
|
||
#if 0
|
||
/* --------- UNIT_TEST for THREAD oriented PACKETS ------------------------- */
|
||
|
||
static void display_thread_info (struct gdb_ext_thread_info *info);
|
||
|
||
static void threadset_test_cmd (char *cmd, int tty);
|
||
|
||
static void threadalive_test (char *cmd, int tty);
|
||
|
||
static void threadlist_test_cmd (char *cmd, int tty);
|
||
|
||
int get_and_display_threadinfo (threadref * ref);
|
||
|
||
static void threadinfo_test_cmd (char *cmd, int tty);
|
||
|
||
static int thread_display_step (threadref * ref, void *context);
|
||
|
||
static void threadlist_update_test_cmd (char *cmd, int tty);
|
||
|
||
static void init_remote_threadtests (void);
|
||
|
||
#define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid */
|
||
|
||
static void
|
||
threadset_test_cmd (char *cmd, int tty)
|
||
{
|
||
int sample_thread = SAMPLE_THREAD;
|
||
|
||
printf_filtered ("Remote threadset test\n");
|
||
set_thread (sample_thread, 1);
|
||
}
|
||
|
||
|
||
static void
|
||
threadalive_test (char *cmd, int tty)
|
||
{
|
||
int sample_thread = SAMPLE_THREAD;
|
||
|
||
if (remote_thread_alive (sample_thread))
|
||
printf_filtered ("PASS: Thread alive test\n");
|
||
else
|
||
printf_filtered ("FAIL: Thread alive test\n");
|
||
}
|
||
|
||
void output_threadid (char *title, threadref * ref);
|
||
|
||
void
|
||
output_threadid (char *title, threadref *ref)
|
||
{
|
||
char hexid[20];
|
||
|
||
pack_threadid (&hexid[0], ref); /* Convert threead id into hex */
|
||
hexid[16] = 0;
|
||
printf_filtered ("%s %s\n", title, (&hexid[0]));
|
||
}
|
||
|
||
static void
|
||
threadlist_test_cmd (char *cmd, int tty)
|
||
{
|
||
int startflag = 1;
|
||
threadref nextthread;
|
||
int done, result_count;
|
||
threadref threadlist[3];
|
||
|
||
printf_filtered ("Remote Threadlist test\n");
|
||
if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
|
||
&result_count, &threadlist[0]))
|
||
printf_filtered ("FAIL: threadlist test\n");
|
||
else
|
||
{
|
||
threadref *scan = threadlist;
|
||
threadref *limit = scan + result_count;
|
||
|
||
while (scan < limit)
|
||
output_threadid (" thread ", scan++);
|
||
}
|
||
}
|
||
|
||
void
|
||
display_thread_info (struct gdb_ext_thread_info *info)
|
||
{
|
||
output_threadid ("Threadid: ", &info->threadid);
|
||
printf_filtered ("Name: %s\n ", info->shortname);
|
||
printf_filtered ("State: %s\n", info->display);
|
||
printf_filtered ("other: %s\n\n", info->more_display);
|
||
}
|
||
|
||
int
|
||
get_and_display_threadinfo (threadref *ref)
|
||
{
|
||
int result;
|
||
int set;
|
||
struct gdb_ext_thread_info threadinfo;
|
||
|
||
set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
|
||
| TAG_MOREDISPLAY | TAG_DISPLAY;
|
||
if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
|
||
display_thread_info (&threadinfo);
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
threadinfo_test_cmd (char *cmd, int tty)
|
||
{
|
||
int athread = SAMPLE_THREAD;
|
||
threadref thread;
|
||
int set;
|
||
|
||
int_to_threadref (&thread, athread);
|
||
printf_filtered ("Remote Threadinfo test\n");
|
||
if (!get_and_display_threadinfo (&thread))
|
||
printf_filtered ("FAIL cannot get thread info\n");
|
||
}
|
||
|
||
static int
|
||
thread_display_step (threadref *ref, void *context)
|
||
{
|
||
/* output_threadid(" threadstep ",ref); *//* simple test */
|
||
return get_and_display_threadinfo (ref);
|
||
}
|
||
|
||
static void
|
||
threadlist_update_test_cmd (char *cmd, int tty)
|
||
{
|
||
printf_filtered ("Remote Threadlist update test\n");
|
||
remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
|
||
}
|
||
|
||
static void
|
||
init_remote_threadtests (void)
|
||
{
|
||
add_com ("tlist", class_obscure, threadlist_test_cmd,
|
||
"Fetch and print the remote list of thread identifiers, one pkt only");
|
||
add_com ("tinfo", class_obscure, threadinfo_test_cmd,
|
||
"Fetch and display info about one thread");
|
||
add_com ("tset", class_obscure, threadset_test_cmd,
|
||
"Test setting to a different thread");
|
||
add_com ("tupd", class_obscure, threadlist_update_test_cmd,
|
||
"Iterate through updating all remote thread info");
|
||
add_com ("talive", class_obscure, threadalive_test,
|
||
" Remote thread alive test ");
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
static void
|
||
init_remote_ops (void)
|
||
{
|
||
remote_ops.to_shortname = "remote";
|
||
remote_ops.to_longname = "Remote serial target in gdb-specific protocol";
|
||
remote_ops.to_doc =
|
||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||
Specify the serial device it is connected to\n\
|
||
(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
|
||
remote_ops.to_open = remote_open;
|
||
remote_ops.to_close = remote_close;
|
||
remote_ops.to_detach = remote_detach;
|
||
remote_ops.to_resume = remote_resume;
|
||
remote_ops.to_wait = remote_wait;
|
||
remote_ops.to_fetch_registers = remote_fetch_registers;
|
||
remote_ops.to_store_registers = remote_store_registers;
|
||
remote_ops.to_prepare_to_store = remote_prepare_to_store;
|
||
remote_ops.to_xfer_memory = remote_xfer_memory;
|
||
remote_ops.to_files_info = remote_files_info;
|
||
remote_ops.to_insert_breakpoint = remote_insert_breakpoint;
|
||
remote_ops.to_remove_breakpoint = remote_remove_breakpoint;
|
||
remote_ops.to_kill = remote_kill;
|
||
remote_ops.to_load = generic_load;
|
||
remote_ops.to_mourn_inferior = remote_mourn;
|
||
remote_ops.to_thread_alive = remote_thread_alive;
|
||
remote_ops.to_find_new_threads = remote_threads_info;
|
||
remote_ops.to_extra_thread_info = remote_threads_extra_info;
|
||
remote_ops.to_stop = remote_stop;
|
||
remote_ops.to_query = remote_query;
|
||
remote_ops.to_rcmd = remote_rcmd;
|
||
remote_ops.to_stratum = process_stratum;
|
||
remote_ops.to_has_all_memory = 1;
|
||
remote_ops.to_has_memory = 1;
|
||
remote_ops.to_has_stack = 1;
|
||
remote_ops.to_has_registers = 1;
|
||
remote_ops.to_has_execution = 1;
|
||
remote_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
|
||
remote_ops.to_magic = OPS_MAGIC;
|
||
}
|
||
|
||
/* Set up the extended remote vector by making a copy of the standard
|
||
remote vector and adding to it. */
|
||
|
||
static void
|
||
init_extended_remote_ops (void)
|
||
{
|
||
extended_remote_ops = remote_ops;
|
||
|
||
extended_remote_ops.to_shortname = "extended-remote";
|
||
extended_remote_ops.to_longname =
|
||
"Extended remote serial target in gdb-specific protocol";
|
||
extended_remote_ops.to_doc =
|
||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||
Specify the serial device it is connected to (e.g. /dev/ttya).",
|
||
extended_remote_ops.to_open = extended_remote_open;
|
||
extended_remote_ops.to_create_inferior = extended_remote_create_inferior;
|
||
extended_remote_ops.to_mourn_inferior = extended_remote_mourn;
|
||
}
|
||
|
||
/*
|
||
* Command: info remote-process
|
||
*
|
||
* This implements Cisco's version of the "info proc" command.
|
||
*
|
||
* This query allows the target stub to return an arbitrary string
|
||
* (or strings) giving arbitrary information about the target process.
|
||
* This is optional; the target stub isn't required to implement it.
|
||
*
|
||
* Syntax: qfProcessInfo request first string
|
||
* qsProcessInfo request subsequent string
|
||
* reply: 'O'<hex-encoded-string>
|
||
* 'l' last reply (empty)
|
||
*/
|
||
|
||
static void
|
||
remote_info_process (char *args, int from_tty)
|
||
{
|
||
char *buf = alloca (PBUFSIZ);
|
||
|
||
if (remote_desc == 0)
|
||
error ("Command can only be used when connected to the remote target.");
|
||
|
||
putpkt ("qfProcessInfo");
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
if (buf[0] == 0)
|
||
return; /* Silently: target does not support this feature. */
|
||
|
||
if (buf[0] == 'E')
|
||
error ("info proc: target error.");
|
||
|
||
while (buf[0] == 'O') /* Capitol-O packet */
|
||
{
|
||
remote_console_output (&buf[1]);
|
||
putpkt ("qsProcessInfo");
|
||
getpkt (buf, PBUFSIZ, 0);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Target Cisco
|
||
*/
|
||
|
||
static void
|
||
remote_cisco_open (char *name, int from_tty)
|
||
{
|
||
if (name == 0)
|
||
error (
|
||
"To open a remote debug connection, you need to specify what \n\
|
||
device is attached to the remote system (e.g. host:port).");
|
||
|
||
/* See FIXME above */
|
||
wait_forever_enabled_p = 1;
|
||
|
||
target_preopen (from_tty);
|
||
|
||
unpush_target (&remote_cisco_ops);
|
||
|
||
remote_desc = SERIAL_OPEN (name);
|
||
if (!remote_desc)
|
||
perror_with_name (name);
|
||
|
||
/*
|
||
* If a baud rate was specified on the gdb command line it will
|
||
* be greater than the initial value of -1. If it is, use it otherwise
|
||
* default to 9600
|
||
*/
|
||
|
||
baud_rate = (baud_rate > 0) ? baud_rate : 9600;
|
||
if (SERIAL_SETBAUDRATE (remote_desc, baud_rate))
|
||
{
|
||
SERIAL_CLOSE (remote_desc);
|
||
perror_with_name (name);
|
||
}
|
||
|
||
SERIAL_RAW (remote_desc);
|
||
|
||
/* If there is something sitting in the buffer we might take it as a
|
||
response to a command, which would be bad. */
|
||
SERIAL_FLUSH_INPUT (remote_desc);
|
||
|
||
if (from_tty)
|
||
{
|
||
puts_filtered ("Remote debugging using ");
|
||
puts_filtered (name);
|
||
puts_filtered ("\n");
|
||
}
|
||
|
||
remote_cisco_mode = 1;
|
||
|
||
push_target (&remote_cisco_ops); /* Switch to using cisco target now */
|
||
|
||
init_all_packet_configs ();
|
||
|
||
general_thread = -2;
|
||
continue_thread = -2;
|
||
|
||
/* Probe for ability to use "ThreadInfo" query, as required. */
|
||
use_threadinfo_query = 1;
|
||
use_threadextra_query = 1;
|
||
|
||
/* Without this, some commands which require an active target (such
|
||
as kill) won't work. This variable serves (at least) double duty
|
||
as both the pid of the target process (if it has such), and as a
|
||
flag indicating that a target is active. These functions should
|
||
be split out into seperate variables, especially since GDB will
|
||
someday have a notion of debugging several processes. */
|
||
inferior_pid = MAGIC_NULL_PID;
|
||
|
||
/* Start the remote connection; if error (0), discard this target. */
|
||
|
||
if (!catch_errors (remote_start_remote_dummy, (char *) 0,
|
||
"Couldn't establish connection to remote target\n",
|
||
RETURN_MASK_ALL))
|
||
{
|
||
pop_target ();
|
||
return;
|
||
}
|
||
}
|
||
|
||
static void
|
||
remote_cisco_close (int quitting)
|
||
{
|
||
remote_cisco_mode = 0;
|
||
remote_close (quitting);
|
||
}
|
||
|
||
static void
|
||
remote_cisco_mourn (void)
|
||
{
|
||
remote_mourn_1 (&remote_cisco_ops);
|
||
}
|
||
|
||
enum
|
||
{
|
||
READ_MORE,
|
||
FATAL_ERROR,
|
||
ENTER_DEBUG,
|
||
DISCONNECT_TELNET
|
||
}
|
||
minitelnet_return;
|
||
|
||
/* shared between readsocket() and readtty() */
|
||
static char *tty_input;
|
||
|
||
static int escape_count;
|
||
static int echo_check;
|
||
extern int quit_flag;
|
||
|
||
static int
|
||
readsocket (void)
|
||
{
|
||
int data;
|
||
|
||
/* Loop until the socket doesn't have any more data */
|
||
|
||
while ((data = readchar (0)) >= 0)
|
||
{
|
||
/* Check for the escape sequence */
|
||
if (data == '|')
|
||
{
|
||
/* If this is the fourth escape, get out */
|
||
if (++escape_count == 4)
|
||
{
|
||
return ENTER_DEBUG;
|
||
}
|
||
else
|
||
{ /* This is a '|', but not the fourth in a row.
|
||
Continue without echoing it. If it isn't actually
|
||
one of four in a row, it'll be echoed later. */
|
||
continue;
|
||
}
|
||
}
|
||
else
|
||
/* Not a '|' */
|
||
{
|
||
/* Ensure any pending '|'s are flushed. */
|
||
|
||
for (; escape_count > 0; escape_count--)
|
||
putchar ('|');
|
||
}
|
||
|
||
if (data == '\r') /* If this is a return character, */
|
||
continue; /* - just supress it. */
|
||
|
||
if (echo_check != -1) /* Check for echo of user input. */
|
||
{
|
||
if (tty_input[echo_check] == data)
|
||
{
|
||
echo_check++; /* Character matched user input: */
|
||
continue; /* Continue without echoing it. */
|
||
}
|
||
else if ((data == '\n') && (tty_input[echo_check] == '\r'))
|
||
{ /* End of the line (and of echo checking). */
|
||
echo_check = -1; /* No more echo supression */
|
||
continue; /* Continue without echoing. */
|
||
}
|
||
else
|
||
{ /* Failed check for echo of user input.
|
||
We now have some suppressed output to flush! */
|
||
int j;
|
||
|
||
for (j = 0; j < echo_check; j++)
|
||
putchar (tty_input[j]);
|
||
echo_check = -1;
|
||
}
|
||
}
|
||
putchar (data); /* Default case: output the char. */
|
||
}
|
||
|
||
if (data == SERIAL_TIMEOUT) /* Timeout returned from readchar. */
|
||
return READ_MORE; /* Try to read some more */
|
||
else
|
||
return FATAL_ERROR; /* Trouble, bail out */
|
||
}
|
||
|
||
static int
|
||
readtty (void)
|
||
{
|
||
int tty_bytecount;
|
||
|
||
/* First, read a buffer full from the terminal */
|
||
tty_bytecount = read (fileno (stdin), tty_input, sizeof (tty_input) - 1);
|
||
if (tty_bytecount == -1)
|
||
{
|
||
perror ("readtty: read failed");
|
||
return FATAL_ERROR;
|
||
}
|
||
|
||
/* Remove a quoted newline. */
|
||
if (tty_input[tty_bytecount - 1] == '\n' &&
|
||
tty_input[tty_bytecount - 2] == '\\') /* line ending in backslash */
|
||
{
|
||
tty_input[--tty_bytecount] = 0; /* remove newline */
|
||
tty_input[--tty_bytecount] = 0; /* remove backslash */
|
||
}
|
||
|
||
/* Turn trailing newlines into returns */
|
||
if (tty_input[tty_bytecount - 1] == '\n')
|
||
tty_input[tty_bytecount - 1] = '\r';
|
||
|
||
/* If the line consists of a ~, enter debugging mode. */
|
||
if ((tty_input[0] == '~') && (tty_bytecount == 2))
|
||
return ENTER_DEBUG;
|
||
|
||
/* Make this a zero terminated string and write it out */
|
||
tty_input[tty_bytecount] = 0;
|
||
if (SERIAL_WRITE (remote_desc, tty_input, tty_bytecount))
|
||
{
|
||
perror_with_name ("readtty: write failed");
|
||
return FATAL_ERROR;
|
||
}
|
||
|
||
return READ_MORE;
|
||
}
|
||
|
||
static int
|
||
minitelnet (void)
|
||
{
|
||
fd_set input; /* file descriptors for select */
|
||
int tablesize; /* max number of FDs for select */
|
||
int status;
|
||
int quit_count = 0;
|
||
|
||
extern int escape_count; /* global shared by readsocket */
|
||
extern int echo_check; /* ditto */
|
||
|
||
escape_count = 0;
|
||
echo_check = -1;
|
||
|
||
tablesize = 8 * sizeof (input);
|
||
|
||
for (;;)
|
||
{
|
||
/* Check for anything from our socket - doesn't block. Note that
|
||
this must be done *before* the select as there may be
|
||
buffered I/O waiting to be processed. */
|
||
|
||
if ((status = readsocket ()) == FATAL_ERROR)
|
||
{
|
||
error ("Debugging terminated by communications error");
|
||
}
|
||
else if (status != READ_MORE)
|
||
{
|
||
return (status);
|
||
}
|
||
|
||
fflush (stdout); /* Flush output before blocking */
|
||
|
||
/* Now block on more socket input or TTY input */
|
||
|
||
FD_ZERO (&input);
|
||
FD_SET (fileno (stdin), &input);
|
||
FD_SET (DEPRECATED_SERIAL_FD (remote_desc), &input);
|
||
|
||
status = select (tablesize, &input, 0, 0, 0);
|
||
if ((status == -1) && (errno != EINTR))
|
||
{
|
||
error ("Communications error on select %d", errno);
|
||
}
|
||
|
||
/* Handle Control-C typed */
|
||
|
||
if (quit_flag)
|
||
{
|
||
if ((++quit_count) == 2)
|
||
{
|
||
if (query ("Interrupt GDB? "))
|
||
{
|
||
printf_filtered ("Interrupted by user.\n");
|
||
return_to_top_level (RETURN_QUIT);
|
||
}
|
||
quit_count = 0;
|
||
}
|
||
quit_flag = 0;
|
||
|
||
if (remote_break)
|
||
SERIAL_SEND_BREAK (remote_desc);
|
||
else
|
||
SERIAL_WRITE (remote_desc, "\003", 1);
|
||
|
||
continue;
|
||
}
|
||
|
||
/* Handle console input */
|
||
|
||
if (FD_ISSET (fileno (stdin), &input))
|
||
{
|
||
quit_count = 0;
|
||
echo_check = 0;
|
||
status = readtty ();
|
||
if (status == READ_MORE)
|
||
continue;
|
||
|
||
return status; /* telnet session ended */
|
||
}
|
||
}
|
||
}
|
||
|
||
static int
|
||
remote_cisco_wait (int pid, struct target_waitstatus *status)
|
||
{
|
||
if (minitelnet () != ENTER_DEBUG)
|
||
{
|
||
error ("Debugging session terminated by protocol error");
|
||
}
|
||
putpkt ("?");
|
||
return remote_wait (pid, status);
|
||
}
|
||
|
||
static void
|
||
init_remote_cisco_ops (void)
|
||
{
|
||
remote_cisco_ops.to_shortname = "cisco";
|
||
remote_cisco_ops.to_longname = "Remote serial target in cisco-specific protocol";
|
||
remote_cisco_ops.to_doc =
|
||
"Use a remote machine via TCP, using a cisco-specific protocol.\n\
|
||
Specify the serial device it is connected to (e.g. host:2020).";
|
||
remote_cisco_ops.to_open = remote_cisco_open;
|
||
remote_cisco_ops.to_close = remote_cisco_close;
|
||
remote_cisco_ops.to_detach = remote_detach;
|
||
remote_cisco_ops.to_resume = remote_resume;
|
||
remote_cisco_ops.to_wait = remote_cisco_wait;
|
||
remote_cisco_ops.to_fetch_registers = remote_fetch_registers;
|
||
remote_cisco_ops.to_store_registers = remote_store_registers;
|
||
remote_cisco_ops.to_prepare_to_store = remote_prepare_to_store;
|
||
remote_cisco_ops.to_xfer_memory = remote_xfer_memory;
|
||
remote_cisco_ops.to_files_info = remote_files_info;
|
||
remote_cisco_ops.to_insert_breakpoint = remote_insert_breakpoint;
|
||
remote_cisco_ops.to_remove_breakpoint = remote_remove_breakpoint;
|
||
remote_cisco_ops.to_kill = remote_kill;
|
||
remote_cisco_ops.to_load = generic_load;
|
||
remote_cisco_ops.to_mourn_inferior = remote_cisco_mourn;
|
||
remote_cisco_ops.to_thread_alive = remote_thread_alive;
|
||
remote_cisco_ops.to_find_new_threads = remote_threads_info;
|
||
remote_ops.to_extra_thread_info = remote_threads_extra_info;
|
||
remote_cisco_ops.to_stratum = process_stratum;
|
||
remote_cisco_ops.to_has_all_memory = 1;
|
||
remote_cisco_ops.to_has_memory = 1;
|
||
remote_cisco_ops.to_has_stack = 1;
|
||
remote_cisco_ops.to_has_registers = 1;
|
||
remote_cisco_ops.to_has_execution = 1;
|
||
remote_cisco_ops.to_magic = OPS_MAGIC;
|
||
}
|
||
|
||
static int
|
||
remote_can_async_p (void)
|
||
{
|
||
/* We're async whenever the serial device is. */
|
||
return (current_target.to_async_mask_value) && SERIAL_CAN_ASYNC_P (remote_desc);
|
||
}
|
||
|
||
static int
|
||
remote_is_async_p (void)
|
||
{
|
||
/* We're async whenever the serial device is. */
|
||
return (current_target.to_async_mask_value) && SERIAL_IS_ASYNC_P (remote_desc);
|
||
}
|
||
|
||
/* Pass the SERIAL event on and up to the client. One day this code
|
||
will be able to delay notifying the client of an event until the
|
||
point where an entire packet has been received. */
|
||
|
||
static void (*async_client_callback) (enum inferior_event_type event_type, void *context);
|
||
static void *async_client_context;
|
||
static serial_event_ftype remote_async_serial_handler;
|
||
|
||
static void
|
||
remote_async_serial_handler (serial_t scb, void *context)
|
||
{
|
||
/* Don't propogate error information up to the client. Instead let
|
||
the client find out about the error by querying the target. */
|
||
async_client_callback (INF_REG_EVENT, async_client_context);
|
||
}
|
||
|
||
static void
|
||
remote_async (void (*callback) (enum inferior_event_type event_type, void *context), void *context)
|
||
{
|
||
if (current_target.to_async_mask_value == 0)
|
||
internal_error ("Calling remote_async when async is masked");
|
||
|
||
if (callback != NULL)
|
||
{
|
||
SERIAL_ASYNC (remote_desc, remote_async_serial_handler, NULL);
|
||
async_client_callback = callback;
|
||
async_client_context = context;
|
||
}
|
||
else
|
||
SERIAL_ASYNC (remote_desc, NULL, NULL);
|
||
}
|
||
|
||
/* Target async and target extended-async.
|
||
|
||
This are temporary targets, until it is all tested. Eventually
|
||
async support will be incorporated int the usual 'remote'
|
||
target. */
|
||
|
||
static void
|
||
init_remote_async_ops (void)
|
||
{
|
||
remote_async_ops.to_shortname = "async";
|
||
remote_async_ops.to_longname = "Remote serial target in async version of the gdb-specific protocol";
|
||
remote_async_ops.to_doc =
|
||
"Use a remote computer via a serial line, using a gdb-specific protocol.\n\
|
||
Specify the serial device it is connected to (e.g. /dev/ttya).";
|
||
remote_async_ops.to_open = remote_async_open;
|
||
remote_async_ops.to_close = remote_close;
|
||
remote_async_ops.to_detach = remote_async_detach;
|
||
remote_async_ops.to_resume = remote_async_resume;
|
||
remote_async_ops.to_wait = remote_async_wait;
|
||
remote_async_ops.to_fetch_registers = remote_fetch_registers;
|
||
remote_async_ops.to_store_registers = remote_store_registers;
|
||
remote_async_ops.to_prepare_to_store = remote_prepare_to_store;
|
||
remote_async_ops.to_xfer_memory = remote_xfer_memory;
|
||
remote_async_ops.to_files_info = remote_files_info;
|
||
remote_async_ops.to_insert_breakpoint = remote_insert_breakpoint;
|
||
remote_async_ops.to_remove_breakpoint = remote_remove_breakpoint;
|
||
remote_async_ops.to_terminal_inferior = remote_async_terminal_inferior;
|
||
remote_async_ops.to_terminal_ours = remote_async_terminal_ours;
|
||
remote_async_ops.to_kill = remote_async_kill;
|
||
remote_async_ops.to_load = generic_load;
|
||
remote_async_ops.to_mourn_inferior = remote_async_mourn;
|
||
remote_async_ops.to_thread_alive = remote_thread_alive;
|
||
remote_async_ops.to_find_new_threads = remote_threads_info;
|
||
remote_ops.to_extra_thread_info = remote_threads_extra_info;
|
||
remote_async_ops.to_stop = remote_stop;
|
||
remote_async_ops.to_query = remote_query;
|
||
remote_async_ops.to_rcmd = remote_rcmd;
|
||
remote_async_ops.to_stratum = process_stratum;
|
||
remote_async_ops.to_has_all_memory = 1;
|
||
remote_async_ops.to_has_memory = 1;
|
||
remote_async_ops.to_has_stack = 1;
|
||
remote_async_ops.to_has_registers = 1;
|
||
remote_async_ops.to_has_execution = 1;
|
||
remote_async_ops.to_has_thread_control = tc_schedlock; /* can lock scheduler */
|
||
remote_async_ops.to_can_async_p = remote_can_async_p;
|
||
remote_async_ops.to_is_async_p = remote_is_async_p;
|
||
remote_async_ops.to_async = remote_async;
|
||
remote_async_ops.to_async_mask_value = 1;
|
||
remote_async_ops.to_magic = OPS_MAGIC;
|
||
}
|
||
|
||
/* Set up the async extended remote vector by making a copy of the standard
|
||
remote vector and adding to it. */
|
||
|
||
static void
|
||
init_extended_async_remote_ops (void)
|
||
{
|
||
extended_async_remote_ops = remote_async_ops;
|
||
|
||
extended_async_remote_ops.to_shortname = "extended-async";
|
||
extended_async_remote_ops.to_longname =
|
||
"Extended remote serial target in async gdb-specific protocol";
|
||
extended_async_remote_ops.to_doc =
|
||
"Use a remote computer via a serial line, using an async gdb-specific protocol.\n\
|
||
Specify the serial device it is connected to (e.g. /dev/ttya).",
|
||
extended_async_remote_ops.to_open = extended_remote_async_open;
|
||
extended_async_remote_ops.to_create_inferior = extended_remote_async_create_inferior;
|
||
extended_async_remote_ops.to_mourn_inferior = extended_remote_mourn;
|
||
}
|
||
|
||
static void
|
||
set_remote_cmd (char *args, int from_tty)
|
||
{
|
||
|
||
}
|
||
|
||
static void
|
||
show_remote_cmd (char *args, int from_tty)
|
||
{
|
||
show_remote_protocol_Z_packet_cmd (args, from_tty);
|
||
show_remote_protocol_P_packet_cmd (args, from_tty);
|
||
show_remote_protocol_binary_download_cmd (args, from_tty);
|
||
}
|
||
|
||
static void
|
||
build_remote_gdbarch_data (void)
|
||
{
|
||
build_remote_packet_sizes ();
|
||
|
||
/* Cisco stuff */
|
||
tty_input = xmalloc (PBUFSIZ);
|
||
remote_address_size = TARGET_PTR_BIT;
|
||
}
|
||
|
||
void
|
||
_initialize_remote (void)
|
||
{
|
||
static struct cmd_list_element *remote_set_cmdlist;
|
||
static struct cmd_list_element *remote_show_cmdlist;
|
||
struct cmd_list_element *tmpcmd;
|
||
|
||
/* architecture specific data */
|
||
build_remote_gdbarch_data ();
|
||
register_gdbarch_swap (&tty_input, sizeof (&tty_input), NULL);
|
||
register_remote_packet_sizes ();
|
||
register_gdbarch_swap (&remote_address_size,
|
||
sizeof (&remote_address_size), NULL);
|
||
register_gdbarch_swap (NULL, 0, build_remote_gdbarch_data);
|
||
|
||
init_remote_ops ();
|
||
add_target (&remote_ops);
|
||
|
||
init_extended_remote_ops ();
|
||
add_target (&extended_remote_ops);
|
||
|
||
init_remote_async_ops ();
|
||
add_target (&remote_async_ops);
|
||
|
||
init_extended_async_remote_ops ();
|
||
add_target (&extended_async_remote_ops);
|
||
|
||
init_remote_cisco_ops ();
|
||
add_target (&remote_cisco_ops);
|
||
|
||
#if 0
|
||
init_remote_threadtests ();
|
||
#endif
|
||
|
||
/* set/show remote ... */
|
||
|
||
add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, "\
|
||
Remote protocol specific variables\n\
|
||
Configure various remote-protocol specific variables such as\n\
|
||
the packets being used",
|
||
&remote_set_cmdlist, "set remote ",
|
||
0/*allow-unknown*/, &setlist);
|
||
add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, "\
|
||
Remote protocol specific variables\n\
|
||
Configure various remote-protocol specific variables such as\n\
|
||
the packets being used",
|
||
&remote_show_cmdlist, "show remote ",
|
||
0/*allow-unknown*/, &showlist);
|
||
|
||
add_cmd ("compare-sections", class_obscure, compare_sections_command,
|
||
"Compare section data on target to the exec file.\n\
|
||
Argument is a single section name (default: all loaded sections).",
|
||
&cmdlist);
|
||
|
||
add_cmd ("packet", class_maintenance, packet_command,
|
||
"Send an arbitrary packet to a remote target.\n\
|
||
maintenance packet TEXT\n\
|
||
If GDB is talking to an inferior via the GDB serial protocol, then\n\
|
||
this command sends the string TEXT to the inferior, and displays the\n\
|
||
response packet. GDB supplies the initial `$' character, and the\n\
|
||
terminating `#' character and checksum.",
|
||
&maintenancelist);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("remotebreak", no_class,
|
||
var_boolean, (char *) &remote_break,
|
||
"Set whether to send break if interrupted.\n",
|
||
&setlist),
|
||
&showlist);
|
||
|
||
/* Install commands for configuring memory read/write packets. */
|
||
|
||
add_cmd ("remotewritesize", no_class, set_memory_write_packet_size,
|
||
"Set the maximum number of bytes per memory write packet (deprecated).\n",
|
||
&setlist);
|
||
add_cmd ("remotewritesize", no_class, show_memory_write_packet_size,
|
||
"Show the maximum number of bytes per memory write packet (deprecated).\n",
|
||
&showlist);
|
||
add_cmd ("memory-write-packet-size", no_class,
|
||
set_memory_write_packet_size,
|
||
"Set the maximum number of bytes per memory-write packet.\n"
|
||
"Specify the number of bytes in a packet or 0 (zero) for the\n"
|
||
"default packet size. The actual limit is further reduced\n"
|
||
"dependent on the target. Specify ``fixed'' to disable the\n"
|
||
"further restriction and ``limit'' to enable that restriction\n",
|
||
&remote_set_cmdlist);
|
||
add_cmd ("memory-read-packet-size", no_class,
|
||
set_memory_read_packet_size,
|
||
"Set the maximum number of bytes per memory-read packet.\n"
|
||
"Specify the number of bytes in a packet or 0 (zero) for the\n"
|
||
"default packet size. The actual limit is further reduced\n"
|
||
"dependent on the target. Specify ``fixed'' to disable the\n"
|
||
"further restriction and ``limit'' to enable that restriction\n",
|
||
&remote_set_cmdlist);
|
||
add_cmd ("memory-write-packet-size", no_class,
|
||
show_memory_write_packet_size,
|
||
"Show the maximum number of bytes per memory-write packet.\n",
|
||
&remote_show_cmdlist);
|
||
add_cmd ("memory-read-packet-size", no_class,
|
||
show_memory_read_packet_size,
|
||
"Show the maximum number of bytes per memory-read packet.\n",
|
||
&remote_show_cmdlist);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("remoteaddresssize", class_obscure,
|
||
var_integer, (char *) &remote_address_size,
|
||
"Set the maximum size of the address (in bits) \
|
||
in a memory packet.\n",
|
||
&setlist),
|
||
&showlist);
|
||
|
||
add_packet_config_cmd (&remote_protocol_binary_download,
|
||
"X", "binary-download",
|
||
set_remote_protocol_binary_download_cmd,
|
||
show_remote_protocol_binary_download_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist,
|
||
1);
|
||
#if 0
|
||
/* XXXX - should ``set remotebinarydownload'' be retained for
|
||
compatibility. */
|
||
add_show_from_set
|
||
(add_set_cmd ("remotebinarydownload", no_class,
|
||
var_boolean, (char *) &remote_binary_download,
|
||
"Set binary downloads.\n", &setlist),
|
||
&showlist);
|
||
#endif
|
||
|
||
add_info ("remote-process", remote_info_process,
|
||
"Query the remote system for process info.");
|
||
|
||
add_packet_config_cmd (&remote_protocol_P,
|
||
"P", "set-register",
|
||
set_remote_protocol_P_packet_cmd,
|
||
show_remote_protocol_P_packet_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist,
|
||
1);
|
||
|
||
add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_SOFTWARE_BP],
|
||
"Z0", "software-breakpoint",
|
||
set_remote_protocol_Z_software_bp_packet_cmd,
|
||
show_remote_protocol_Z_software_bp_packet_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist,
|
||
0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_HARDWARE_BP],
|
||
"Z1", "hardware-breakpoint",
|
||
set_remote_protocol_Z_hardware_bp_packet_cmd,
|
||
show_remote_protocol_Z_hardware_bp_packet_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist,
|
||
0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_WRITE_WP],
|
||
"Z2", "write-watchpoint",
|
||
set_remote_protocol_Z_write_wp_packet_cmd,
|
||
show_remote_protocol_Z_write_wp_packet_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist,
|
||
0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_READ_WP],
|
||
"Z3", "read-watchpoint",
|
||
set_remote_protocol_Z_read_wp_packet_cmd,
|
||
show_remote_protocol_Z_read_wp_packet_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist,
|
||
0);
|
||
|
||
add_packet_config_cmd (&remote_protocol_Z[Z_PACKET_ACCESS_WP],
|
||
"Z4", "access-watchpoint",
|
||
set_remote_protocol_Z_access_wp_packet_cmd,
|
||
show_remote_protocol_Z_access_wp_packet_cmd,
|
||
&remote_set_cmdlist, &remote_show_cmdlist,
|
||
0);
|
||
|
||
/* Keep the old ``set remote Z-packet ...'' working. */
|
||
tmpcmd = add_set_auto_boolean_cmd ("Z-packet", class_obscure,
|
||
&remote_Z_packet_detect,
|
||
"\
|
||
Set use of remote protocol `Z' packets", &remote_set_cmdlist);
|
||
tmpcmd->function.sfunc = set_remote_protocol_Z_packet_cmd;
|
||
add_cmd ("Z-packet", class_obscure, show_remote_protocol_Z_packet_cmd,
|
||
"Show use of remote protocol `Z' packets ",
|
||
&remote_show_cmdlist);
|
||
}
|