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.
474 lines
12 KiB
C
474 lines
12 KiB
C
/* Generic remote debugging interface for simulators.
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Copyright 1993 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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Steve Chamberlain (sac@cygnus.com) and Doug Evans (dje@cygnus.com).
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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 "inferior.h"
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#include "wait.h"
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#include "value.h"
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#include <string.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <errno.h>
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#include "terminal.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "remote-sim.h"
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#include "remote-utils.h"
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/* Naming convention:
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sim_* are the interface to the simulator (see remote-sim.h).
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gdbsim_* are stuff which is internal to gdb. */
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/* Forward data declarations */
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extern struct target_ops gdbsim_ops;
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static int program_loaded = 0;
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static void
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dump_mem (buf, len)
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char *buf;
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int len;
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{
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if (len <= 8)
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{
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if (len == 8 || len == 4)
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{
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long l[2];
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memcpy (l, buf, len);
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printf_filtered ("\t0x%x", l[0]);
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printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]);
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}
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else
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{
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int i;
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printf_filtered ("\t");
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for (i = 0; i < len; i++)
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printf_filtered ("0x%x ", buf[i]);
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printf_filtered ("\n");
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}
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}
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}
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static void
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gdbsim_fetch_register (regno)
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int regno;
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{
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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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gdbsim_fetch_register (regno);
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}
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else
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{
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char buf[MAX_REGISTER_RAW_SIZE];
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sim_fetch_register (regno, buf);
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supply_register (regno, buf);
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if (sr_get_debug ())
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{
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printf_filtered ("gdbsim_fetch_register: %d", regno);
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/* FIXME: We could print something more intelligible. */
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dump_mem (buf, REGISTER_RAW_SIZE (regno));
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}
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}
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}
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static void
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gdbsim_store_register (regno)
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int regno;
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{
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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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gdbsim_store_register (regno);
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}
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else
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{
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/* FIXME: Until read_register() returns LONGEST, we have this. */
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char tmp[MAX_REGISTER_RAW_SIZE];
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read_register_gen (regno, tmp);
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sim_store_register (regno, tmp);
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if (sr_get_debug ())
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{
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printf_filtered ("gdbsim_store_register: %d", regno);
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/* FIXME: We could print something more intelligible. */
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dump_mem (tmp, REGISTER_RAW_SIZE (regno));
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}
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}
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}
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static void
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gdbsim_kill ()
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{
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if (sr_get_debug ())
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printf_filtered ("gdbsim_kill\n");
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sim_kill (); /* close fd's, remove mappings */
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inferior_pid = 0;
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}
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/* Load an executable file into the target process. This is expected to
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not only bring new code into the target process, but also to update
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GDB's symbol tables to match. */
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static void
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gdbsim_load (prog, fromtty)
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char *prog;
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int fromtty;
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{
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bfd *abfd;
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if (sr_get_debug ())
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printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
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inferior_pid = 0;
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program_loaded = 0;
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abfd = bfd_openr (prog, gnutarget);
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if (!abfd)
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error ("Unable to open file %s.", prog);
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if (bfd_check_format (abfd, bfd_object) == 0)
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error ("File is not an object file.");
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if (sim_load (abfd, prog) != 0)
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return;
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program_loaded = 1;
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sim_set_pc (abfd->start_address);
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}
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/*
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* This is a utility routine that sim_load() can call to do the work.
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* The result is 0 for success, non-zero for failure.
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*
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* Eg: int sim_load (bfd *abfd, char *prog) { return sim_load_standard (abfd); }
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*/
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sim_load_standard (abfd)
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bfd *abfd;
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{
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asection *s;
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s = abfd->sections;
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while (s != (asection *)NULL)
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{
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if (s->flags & SEC_LOAD)
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{
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int i;
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int delta = 4096;
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char *buffer = xmalloc (delta);
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printf_filtered ("%s\t: 0x%4x .. 0x%4x ",
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s->name, s->vma, s->vma + s->_raw_size);
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for (i = 0; i < s->_raw_size; i+= delta)
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{
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int sub_delta = delta;
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if (sub_delta > s->_raw_size - i)
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sub_delta = s->_raw_size - i ;
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bfd_get_section_contents (abfd, s, buffer, i, sub_delta);
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sim_write (s->vma + i, buffer, sub_delta);
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printf_filtered ("*");
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gdb_flush (gdb_stdout);
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}
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printf_filtered ("\n");
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free (buffer);
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}
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s = s->next;
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}
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return 0;
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}
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/* Start an inferior process and set inferior_pid to its pid.
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EXEC_FILE is the file to run.
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ALLARGS is a string containing the arguments to the program.
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ENV is the environment vector to pass. Errors reported with error().
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On VxWorks and various standalone systems, we ignore exec_file. */
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/* This is called not only when we first attach, but also when the
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user types "run" after having attached. */
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static void
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gdbsim_create_inferior (exec_file, args, env)
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char *exec_file;
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char *args;
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char **env;
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{
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int len,entry_pt;
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char *arg_buf,**argv;
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if (! program_loaded)
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error ("No program loaded.");
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if (sr_get_debug ())
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printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
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exec_file, args);
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if (exec_file == 0 || exec_bfd == 0)
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error ("No exec file specified.");
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entry_pt = (int) bfd_get_start_address (exec_bfd);
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gdbsim_kill (NULL, NULL);
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remove_breakpoints ();
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init_wait_for_inferior ();
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len = 5 + strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10;
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arg_buf = (char *) alloca (len);
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arg_buf[0] = '\0';
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strcat (arg_buf, exec_file);
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strcat (arg_buf, " ");
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strcat (arg_buf, args);
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argv = buildargv (arg_buf);
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make_cleanup (freeargv, (char *) argv);
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/* FIXME: remote-sim.h says targets that don't support this return
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non-zero. Perhaps distinguish between "not supported" and other errors?
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Or maybe that can be the only error. */
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if (sim_set_args (argv, env) != 0)
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return;
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inferior_pid = 42;
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insert_breakpoints (); /* Needed to get correct instruction in cache */
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proceed (entry_pt, -1, 0);
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}
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/* The open routine takes the rest of the parameters from the command,
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and (if successful) pushes a new target onto the stack.
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Targets should supply this routine, if only to provide an error message. */
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/* Called when selecting the simulator. EG: (gdb) target sim name. */
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static void
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gdbsim_open (args, from_tty)
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char *args;
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int from_tty;
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{
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if (sr_get_debug ())
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printf_filtered ("gdbsim_open: args \"%s\"\n", args);
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if (sim_open (args) != 0)
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{
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/* FIXME: This is totally bogus. sim_open should have a way to
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tell us what the error was, so we can tell the user. */
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error ("Unable to initialize simulator (insufficient memory?).");
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return;
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}
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push_target (&gdbsim_ops);
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target_fetch_registers (-1);
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printf_filtered ("Connected to the simulator.\n");
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}
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/* Does whatever cleanup is required for a target that we are no longer
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going to be calling. Argument says whether we are quitting gdb and
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should not get hung in case of errors, or whether we want a clean
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termination even if it takes a while. This routine is automatically
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always called just before a routine is popped off the target stack.
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Closing file descriptors and freeing memory are typical things it should
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do. */
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/* Close out all files and local state before this target loses control. */
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static void
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gdbsim_close (quitting)
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int quitting;
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{
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if (sr_get_debug ())
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printf_filtered ("gdbsim_close: quitting %d\n", quitting);
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program_loaded = 0;
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/* FIXME: Need to call sim_close() to close all files and
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delete all mappings. */
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}
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/* Takes a program previously attached to and detaches it.
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The program may resume execution (some targets do, some don't) and will
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no longer stop on signals, etc. We better not have left any breakpoints
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in the program or it'll die when it hits one. ARGS is arguments
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typed by the user (e.g. a signal to send the process). FROM_TTY
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says whether to be verbose or not. */
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/* Terminate the open connection to the remote debugger.
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Use this when you want to detach and do something else with your gdb. */
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static void
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gdbsim_detach (args,from_tty)
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char *args;
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int from_tty;
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{
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if (sr_get_debug ())
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printf_filtered ("gdbsim_detach: args \"%s\"\n", args);
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pop_target (); /* calls gdbsim_close to do the real work */
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if (from_tty)
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printf_filtered ("Ending simulator %s debugging\n", target_shortname);
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}
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/* Resume execution of the target process. STEP says whether to single-step
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or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given
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to the target, or zero for no signal. */
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static void
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gdbsim_resume (pid, step, siggnal)
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int pid, step, siggnal;
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{
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if (sr_get_debug ())
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printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal);
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sim_resume (step, siggnal);
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}
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/* Wait for inferior process to do something. Return pid of child,
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or -1 in case of error; store status through argument pointer STATUS,
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just as `wait' would. */
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static int
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gdbsim_wait (pid, status)
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int pid;
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WAITTYPE *status;
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{
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int sigrc;
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enum sim_stop reason;
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if (sr_get_debug ())
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printf_filtered ("gdbsim_wait: ");
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sim_stop_reason (&reason, &sigrc);
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if (reason == sim_exited)
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WSETEXIT (*status, sigrc);
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else
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WSETSTOP (*status, sigrc);
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if (sr_get_debug ())
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printf_filtered ("status %d\n", *status);
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return inferior_pid;
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}
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/* Get ready to modify the registers array. On machines which store
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individual registers, this doesn't need to do anything. On machines
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which store all the registers in one fell swoop, this makes sure
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that registers contains all the registers from the program being
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debugged. */
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static void
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gdbsim_prepare_to_store ()
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{
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/* Do nothing, since we can store individual regs */
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}
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static int
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gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target)
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CORE_ADDR memaddr;
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char *myaddr;
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int len;
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int write;
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struct target_ops *target; /* ignored */
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{
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if (! program_loaded)
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error ("No program loaded.");
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if (sr_get_debug ())
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{
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printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n",
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myaddr, memaddr, len, write);
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if (sr_get_debug () && write)
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dump_mem(myaddr, len);
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}
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if (write)
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{
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len = sim_write (memaddr, myaddr, len);
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}
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else
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{
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len = sim_read (memaddr, myaddr, len);
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if (sr_get_debug () && len > 0)
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dump_mem(myaddr, len);
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}
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return len;
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}
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static void
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gdbsim_files_info (target)
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struct target_ops *target;
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{
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char *file = "nothing";
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if (exec_bfd)
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file = bfd_get_filename (exec_bfd);
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if (sr_get_debug ())
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printf_filtered ("gdbsim_files_info: file \"%s\"\n", file);
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if (exec_bfd)
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{
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printf_filtered ("\tAttached to %s running program %s\n",
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target_shortname, file);
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sim_info (printf_filtered, 0);
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}
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}
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/* Clear the sims notion of what the break points are. */
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static void
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gdbsim_mourn_inferior ()
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{
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if (sr_get_debug ())
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printf_filtered ("gdbsim_mourn_inferior:\n");
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remove_breakpoints ();
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generic_mourn_inferior ();
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}
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/* Define the target subroutine names */
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struct target_ops gdbsim_ops =
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{
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"sim", "simulator",
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"Use the simulator",
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gdbsim_open, gdbsim_close,
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0, gdbsim_detach, gdbsim_resume, gdbsim_wait, /* attach */
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gdbsim_fetch_register, gdbsim_store_register,
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gdbsim_prepare_to_store,
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gdbsim_xfer_inferior_memory,
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gdbsim_files_info,
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0, 0, /* Breakpoints */
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0, 0, 0, 0, 0, /* Terminal handling */
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gdbsim_kill, /* kill */
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gdbsim_load,
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0, /* lookup_symbol */
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gdbsim_create_inferior, /* create_inferior */
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gdbsim_mourn_inferior, /* mourn_inferior */
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0, /* can_run */
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0, /* notice_signals */
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process_stratum, 0, /* next */
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1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
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0, 0, /* Section pointers */
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OPS_MAGIC, /* Always the last thing */
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};
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void
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_initialize_remote_sim ()
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{
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add_target (&gdbsim_ops);
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}
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