Browse Source
* remote-sim.c: Add remote debug feature. Rename stuff to distinguish interface to simulator from gdb-specific stuff. Other changes. start-sanitize-v9 * remote-sp64sim.c: Renamed to remote-sim.c. Use sr_get_debug instead of our own sim_verbose/simif_snoop. Use gnutarget in call to bfd_openr. Rename simif_* to gdbsim_*. * config/sparc/sp64sim.mt: Change remote-sp64sim.c to remote-sim.c. end-sanitize-v9gdb-4_18-branch
Jim Kingdon
33 years ago
6 changed files with 337 additions and 631 deletions
@ -1,493 +0,0 @@ |
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/* 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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/* Naming conventions:
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simif_xxx are internal objects that describe top level interfaces to the |
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simulator (simif for SIMulator InterFace, duh...). |
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sim_xxx are external counterparts to the simif_xxx objects that must be |
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provided by the simulator. |
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See simif.h for a description. */ |
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/* Forward data declarations */ |
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extern struct target_ops simif_ops; |
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int sim_verbose = 0; /* available to the simulator to use */ |
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static int program_loaded = 0; |
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static void dump_mem (); |
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static void |
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simif_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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simif_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 (sim_verbose) |
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{ |
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printf_filtered ("simif_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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simif_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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simif_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 value[MAX_REGISTER_RAW_SIZE]; |
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read_register_gen (regno, value); |
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SWAP_TARGET_AND_HOST (value, REGISTER_RAW_SIZE (regno)); |
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sim_store_register (regno, value); |
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if (sim_verbose) |
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{ |
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printf_filtered ("simif_store_register: %d", regno); |
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/* FIXME: We could print something more intelligible. */ |
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dump_mem (value, 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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simif_kill () |
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{ |
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if (sim_verbose) |
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printf_filtered ("simif_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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simif_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 (sim_verbose) |
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printf_filtered ("simif_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, (char *) 0); |
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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 *bfd, char *prog) { return sim_load_standard (bfd); } |
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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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fflush (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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simif_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 (sim_verbose) |
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printf_filtered ("simif_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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simif_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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simif_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 (sim_verbose) |
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printf_filtered ("simif_open: args \"%s\"\n", args); |
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if (sim_open (args) != 0) |
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{ |
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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 (&simif_ops); |
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target_fetch_registers (-1); |
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/* FIXME: check from_tty here? */ |
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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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simif_close (quitting) |
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int quitting; |
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{ |
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if (sim_verbose) |
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printf_filtered ("simif_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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simif_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 (sim_verbose) |
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printf_filtered ("simif_detach: args \"%s\"\n", args); |
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pop_target (); /* calls simif_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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simif_resume (pid, step, siggnal) |
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int pid, step, siggnal; |
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{ |
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if (sim_verbose) |
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printf_filtered ("simif_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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simif_wait (status) |
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WAITTYPE *status; |
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{ |
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if (sim_verbose) |
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printf_filtered ("simif_wait: "); |
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#if 1 |
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*status = sim_stop_signal (); |
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#else |
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WSETSTOP (*status, sim_stop_signal ()); |
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#endif |
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if (sim_verbose) |
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printf_filtered ("status %d\n", *status); |
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return 0; |
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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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simif_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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simif_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 (sim_verbose) |
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{ |
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printf_filtered ("simif_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 (sim_verbose && 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 (sim_verbose && 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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simif_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 (sim_verbose) |
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printf_filtered ("simif_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 (); |
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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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simif_mourn_inferior () |
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{ |
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if (sim_verbose) |
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printf_filtered ("simif_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 simif_ops = |
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{ |
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"sim", "simulator", |
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"Use the simulator", |
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simif_open, simif_close, |
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0, simif_detach, simif_resume, simif_wait, /* attach */ |
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simif_fetch_register, simif_store_register, |
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simif_prepare_to_store, |
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simif_xfer_inferior_memory, |
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simif_files_info, |
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0, 0, /* Breakpoints */ |
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0, 0, 0, 0, 0, /* Terminal handling */ |
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simif_kill, /* FIXME, kill */ |
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simif_load, |
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0, /* lookup_symbol */ |
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simif_create_inferior, /* create_inferior */ |
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simif_mourn_inferior, /* mourn_inferior FIXME */ |
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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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static void |
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simif_snoop () |
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{ |
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sim_verbose = ! sim_verbose; |
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if (sim_verbose) |
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printf_filtered ("Snoop enabled\n"); |
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else |
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printf_filtered ("Snoop disabled\n"); |
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} |
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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 (&simif_ops); |
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add_com ("snoop", class_obscure, simif_snoop, |
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"Show what commands are going to the simulator"); |
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} |
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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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