199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
284 lines
6.9 KiB
C
284 lines
6.9 KiB
C
<<<<<<< 2.6 is dead >>>>>>>
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/* Native-dependent code for Lynx running on i386's, for GDB.
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Copyright 1988, 1989, 1991, 1992, 1993
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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "frame.h"
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#include "inferior.h"
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#include "target.h"
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#include <sys/ptrace.h>
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#include "/usr/include/sys/wait.h"
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/* these values indicate the offset of the named register in the econtext
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structure */
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#define EAX 10
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#define ECX 9
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#define EDX 8
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#define EBX 7
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#define ESP 16
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#define EBP 5
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#define ESI 4
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#define EDI 3
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#define EIP 13
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#define EFL 15
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#define CS 14
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#define SS 17
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#define DS 2
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#define ES 1
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/* Currently these are not being used. So set them to 0 */
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#define FS 0
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#define GS 0
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/* this table must line up with REGISTER_NAMES in m-i386.h */
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static unsigned int regmap[] =
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{
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EAX, ECX, EDX, EBX,
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ESP, EBP, ESI, EDI,
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EIP, EFL, CS, SS,
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DS, ES, FS, GS,
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};
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/* Return the address in the core dump or inferior of register REGNO.
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BLOCKEND is the address of the econtext structure */
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static unsigned int
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register_addr (regno, blockend)
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int regno, blockend;
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{
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if (regno < 0 || regno >= NUM_REGS)
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error ("Invalid register number %d.", regno);
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return (blockend + regmap[regno] * sizeof (long));
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}
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/* Fetch one register. */
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static void
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fetch_register (regno, offset, bpid)
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int regno, bpid;
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unsigned int offset;
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{
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unsigned int regaddr;
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char buf[MAX_REGISTER_RAW_SIZE];
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char mess[128]; /* For messages */
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int i;
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regaddr = register_addr (regno, offset);
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
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{
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errno = 0;
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*(int *) &buf[i] = ptrace (PTRACE_PEEKTHREAD, bpid,
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(PTRACE_ARG3_TYPE) regaddr, 0);
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regaddr += sizeof (int);
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if (errno != 0)
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{
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sprintf (mess, "reading register %s (#%d)", reg_names[regno], regno);
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perror_with_name (mess);
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}
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}
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supply_register (regno, buf);
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}
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/* Store our register values back into the inferior.
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If REGNO is -1, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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static void
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store_register (regno, offset, bpid)
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int regno, bpid;
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unsigned int offset;
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{
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unsigned int regaddr;
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char mess[128];
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extern char registers[];
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int i;
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regaddr = register_addr (regno, offset);
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
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{
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errno = 0;
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ptrace (PTRACE_POKEUSER, bpid, (PTRACE_ARG3_TYPE) regaddr,
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*(int *) ®isters[REGISTER_BYTE (regno) + i]);
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if (errno != 0)
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{
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sprintf (mess, "writing register number %d(%d)", regno, i);
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perror_with_name (mess);
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}
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regaddr += sizeof(int);
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}
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}
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/* return an offset for use with register_addr() */
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static unsigned int
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fetch_offset (pid)
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int pid;
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{
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struct st_entry s;
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unsigned int specpage_off, offset = (char *) &s.ecp - (char *) &s;
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errno = 0;
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specpage_off = ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE) 0, 0);
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if (errno != 0)
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perror_with_name ("ptrace");
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errno = 0;
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offset = ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE) offset, 0)
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- specpage_off;
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if (errno != 0)
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perror_with_name ("ptrace");
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return offset;
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}
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/* Fetch all registers, or just one, from the child process. */
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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unsigned int offset = fetch_offset (inferior_pid);
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if (regno == -1)
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{
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for (regno = 0; regno < NUM_REGS; regno++)
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fetch_register (regno, offset, inferior_pid);
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}
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else
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fetch_register (regno, offset, inferior_pid);
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}
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/* Store all registers, or just one, to the child process. */
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void
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store_inferior_registers (regno)
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int regno;
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{
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unsigned int offset = fetch_offset (inferior_pid);
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if (regno == -1)
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{
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for (regno = 0; regno < NUM_REGS; regno++)
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store_register (regno, offset, inferior_pid);
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}
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else
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store_register (regno, offset, inferior_pid);
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}
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/* Wait for child to do something. Return pid of child, or -1 in case
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of error; store status through argument pointer STATUS. */
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int
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child_wait (pid, status)
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int pid;
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int *status;
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{
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int save_errno;
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int thread;
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while (1)
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{
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int sig;
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if (attach_flag)
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set_sigint_trap(); /* Causes SIGINT to be passed on to the
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attached process. */
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pid = wait (status);
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save_errno = errno;
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if (attach_flag)
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clear_sigint_trap();
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if (pid == -1)
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{
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if (save_errno == EINTR)
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continue;
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fprintf_unfiltered (gdb_stderr, "Child process unexpectedly missing: %s.\n",
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safe_strerror (save_errno));
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*status = 42; /* Claim it exited with signal 42 */
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return -1;
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}
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if (pid != PIDGET (inferior_pid)) /* Some other process?!? */
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continue;
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/* thread = WIFTID (*status);*/
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thread = *status >> 16;
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/* Initial thread value can only be acquired via wait, so we have to
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resort to this hack. */
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if (TIDGET (inferior_pid) == 0)
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{
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inferior_pid = BUILDPID (inferior_pid, thread);
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add_thread (inferior_pid);
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}
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pid = BUILDPID (pid, thread);
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return pid;
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}
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}
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/* Convert a Lynx process ID to a string. Returns the string in a static
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buffer. */
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char *
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i386lynx_pid_to_str (pid)
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int pid;
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{
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static char buf[40];
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sprintf (buf, "process %d thread %d", PIDGET (pid), TIDGET (pid));
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return buf;
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}
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/* Extract the register values out of the core file and store
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them where `read_register' will find them.
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CORE_REG_SECT points to the register values themselves, read into memory.
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CORE_REG_SIZE is the size of that area.
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WHICH says which set of registers we are handling (0 = int, 2 = float
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on machines where they are discontiguous).
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REG_ADDR is the offset from u.u_ar0 to the register values relative to
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core_reg_sect. This is used with old-fashioned core files to
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locate the registers in a large upage-plus-stack ".reg" section.
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Original upage address X is at location core_reg_sect+x+reg_addr.
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*/
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void
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fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
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char *core_reg_sect;
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unsigned core_reg_size;
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int which;
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unsigned reg_addr;
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{
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struct st_entry s;
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unsigned int regno, addr;
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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addr = register_addr (regno, (char *) &s.ec - (char *) &s);
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supply_register (regno, core_reg_sect + addr);
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}
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}
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