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Diffstat (limited to 'gdb/remote-sim.c')
| -rw-r--r-- | gdb/remote-sim.c | 1003 |
1 files changed, 1003 insertions, 0 deletions
diff --git a/gdb/remote-sim.c b/gdb/remote-sim.c new file mode 100644 index 00000000000..e10fcedd6b7 --- /dev/null +++ b/gdb/remote-sim.c @@ -0,0 +1,1003 @@ +/* Generic remote debugging interface for simulators. + Copyright 1993, 1994, 1996, 1997 Free Software Foundation, Inc. + Contributed by Cygnus Support. + Steve Chamberlain (sac@cygnus.com). + +This file is part of GDB. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "inferior.h" +#include "wait.h" +#include "value.h" +#include "gdb_string.h" +#include <ctype.h> +#include <fcntl.h> +#include <signal.h> +#include <setjmp.h> +#include <errno.h> +#include "terminal.h" +#include "target.h" +#include "gdbcore.h" +#include "callback.h" +#include "remote-sim.h" +#include "remote-utils.h" +#include "command.h" + +/* Prototypes */ + +static void dump_mem PARAMS ((char *buf, int len)); + +static void init_callbacks PARAMS ((void)); + +static void end_callbacks PARAMS ((void)); + +static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); + +static void gdb_os_flush_stdout PARAMS ((host_callback *)); + +static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); + +static void gdb_os_flush_stderr PARAMS ((host_callback *)); + +static int gdb_os_poll_quit PARAMS ((host_callback *)); + +/* printf_filtered is depreciated */ +static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...)); + +static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); + +static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); + +static void gdb_os_error PARAMS ((host_callback *, const char *, ...)); + +static void gdbsim_fetch_register PARAMS ((int regno)); + +static void gdbsim_store_register PARAMS ((int regno)); + +static void gdbsim_kill PARAMS ((void)); + +static void gdbsim_load PARAMS ((char *prog, int fromtty)); + +static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); + +static void gdbsim_open PARAMS ((char *args, int from_tty)); + +static void gdbsim_close PARAMS ((int quitting)); + +static void gdbsim_detach PARAMS ((char *args, int from_tty)); + +static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); + +static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status)); + +static void gdbsim_prepare_to_store PARAMS ((void)); + +static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, + char *myaddr, int len, + int write, + struct target_ops *target)); + +static void gdbsim_files_info PARAMS ((struct target_ops *target)); + +static void gdbsim_mourn_inferior PARAMS ((void)); + +static void gdbsim_stop PARAMS ((void)); + +void simulator_command PARAMS ((char *args, int from_tty)); + +/* Naming convention: + + sim_* are the interface to the simulator (see remote-sim.h). + gdbsim_* are stuff which is internal to gdb. */ + +/* Forward data declarations */ +extern struct target_ops gdbsim_ops; + +static int program_loaded = 0; + +/* We must keep track of whether the simulator has been opened or not because + GDB can call a target's close routine twice, but sim_close doesn't allow + this. We also need to record the result of sim_open so we can pass it + back to the other sim_foo routines. */ +static SIM_DESC gdbsim_desc = 0; + +static void +dump_mem (buf, len) + char *buf; + int len; +{ + if (len <= 8) + { + if (len == 8 || len == 4) + { + long l[2]; + memcpy (l, buf, len); + printf_filtered ("\t0x%x", l[0]); + printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); + } + else + { + int i; + printf_filtered ("\t"); + for (i = 0; i < len; i++) + printf_filtered ("0x%x ", buf[i]); + printf_filtered ("\n"); + } + } +} + +static host_callback gdb_callback; +static int callbacks_initialized = 0; + +/* Initialize gdb_callback. */ + +static void +init_callbacks () +{ + if (! callbacks_initialized) + { + gdb_callback = default_callback; + gdb_callback.init (&gdb_callback); + gdb_callback.write_stdout = gdb_os_write_stdout; + gdb_callback.flush_stdout = gdb_os_flush_stdout; + gdb_callback.write_stderr = gdb_os_write_stderr; + gdb_callback.flush_stderr = gdb_os_flush_stderr; + gdb_callback.printf_filtered = gdb_os_printf_filtered; + gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; + gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; + gdb_callback.error = gdb_os_error; + gdb_callback.poll_quit = gdb_os_poll_quit; + gdb_callback.magic = HOST_CALLBACK_MAGIC; + callbacks_initialized = 1; + } +} + +/* Release callbacks (free resources used by them). */ + +static void +end_callbacks () +{ + if (callbacks_initialized) + { + gdb_callback.shutdown (&gdb_callback); + callbacks_initialized = 0; + } +} + +/* GDB version of os_write_stdout callback. */ + +static int +gdb_os_write_stdout (p, buf, len) + host_callback *p; + const char *buf; + int len; +{ + int i; + char b[2]; + + for (i = 0; i < len; i++) + { + b[0] = buf[i]; + b[1] = 0; + if (target_output_hook) + target_output_hook (b); + else + fputs_filtered (b, gdb_stdout); + } + return len; +} + +/* GDB version of os_flush_stdout callback. */ + +static void +gdb_os_flush_stdout (p) + host_callback *p; +{ + gdb_flush (gdb_stdout); +} + +/* GDB version of os_write_stderr callback. */ + +static int +gdb_os_write_stderr (p, buf, len) + host_callback *p; + const char *buf; + int len; +{ + int i; + char b[2]; + + for (i = 0; i < len; i++) + { + b[0] = buf[i]; + b[1] = 0; + if (target_output_hook) + target_output_hook (b); + else + fputs_filtered (b, gdb_stderr); + } + return len; +} + +/* GDB version of os_flush_stderr callback. */ + +static void +gdb_os_flush_stderr (p) + host_callback *p; +{ + gdb_flush (gdb_stderr); +} + +/* GDB version of printf_filtered callback. */ + +/* VARARGS */ +static void +#ifdef ANSI_PROTOTYPES +gdb_os_printf_filtered (host_callback *p, const char *format, ...) +#else +gdb_os_printf_filtered (p, va_alist) + host_callback *p; + va_dcl +#endif +{ + va_list args; +#ifdef ANSI_PROTOTYPES + va_start (args, format); +#else + char *format; + + va_start (args); + format = va_arg (args, char *); +#endif + + vfprintf_filtered (gdb_stdout, format, args); + + va_end (args); +} + +/* GDB version of error vprintf_filtered. */ + +/* VARARGS */ +static void +#ifdef ANSI_PROTOTYPES +gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) +#else +gdb_os_vprintf_filtered (p, format, ap) + host_callback *p; + char *format; + va_list ap; +#endif +{ + vfprintf_filtered (gdb_stdout, format, ap); +} + +/* GDB version of error evprintf_filtered. */ + +/* VARARGS */ +static void +#ifdef ANSI_PROTOTYPES +gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) +#else +gdb_os_evprintf_filtered (p, format, ap) + host_callback *p; + char *format; + va_list ap; +#endif +{ + vfprintf_filtered (gdb_stderr, format, ap); +} + +/* GDB version of error callback. */ + +/* VARARGS */ +static void +#ifdef ANSI_PROTOTYPES +gdb_os_error (host_callback *p, const char *format, ...) +#else +gdb_os_error (p, va_alist) + host_callback *p; + va_dcl +#endif +{ + if (error_hook) + (*error_hook) (); + else + { + va_list args; +#ifdef ANSI_PROTOTYPES + va_start (args, format); +#else + char *format; + + va_start (args); + format = va_arg (args, char *); +#endif + + error_begin (); + vfprintf_filtered (gdb_stderr, format, args); + fprintf_filtered (gdb_stderr, "\n"); + va_end (args); + return_to_top_level (RETURN_ERROR); + } +} + +static void +gdbsim_fetch_register (regno) + int regno; +{ + static int warn_user = 1; + if (regno == -1) + { + for (regno = 0; regno < NUM_REGS; regno++) + gdbsim_fetch_register (regno); + } + else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') + { + char buf[MAX_REGISTER_RAW_SIZE]; + int nr_bytes = sim_fetch_register (gdbsim_desc, regno, buf, REGISTER_RAW_SIZE (regno)); + if (nr_bytes == 0) + /* register not applicable, supply zero's */ + memset (buf, 0, MAX_REGISTER_RAW_SIZE); + else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno) + && warn_user) + { + printf_unfiltered ("Size of register %s (%d) incorrect (%d instead of %d))", + REGISTER_NAME (regno), regno, + nr_bytes, REGISTER_RAW_SIZE (regno)); + warn_user = 0; + } + supply_register (regno, buf); + if (sr_get_debug ()) + { + printf_filtered ("gdbsim_fetch_register: %d", regno); + /* FIXME: We could print something more intelligible. */ + dump_mem (buf, REGISTER_RAW_SIZE (regno)); + } + } +} + + +static void +gdbsim_store_register (regno) + int regno; +{ + if (regno == -1) + { + for (regno = 0; regno < NUM_REGS; regno++) + gdbsim_store_register (regno); + } + else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') + { + char tmp[MAX_REGISTER_RAW_SIZE]; + int nr_bytes; + read_register_gen (regno, tmp); + nr_bytes = sim_store_register (gdbsim_desc, regno, tmp, REGISTER_RAW_SIZE (regno)); + if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)) + fatal ("Register size different to expected"); + if (sr_get_debug ()) + { + printf_filtered ("gdbsim_store_register: %d", regno); + /* FIXME: We could print something more intelligible. */ + dump_mem (tmp, REGISTER_RAW_SIZE (regno)); + } + } +} + +/* Kill the running program. This may involve closing any open files + and releasing other resources acquired by the simulated program. */ + +static void +gdbsim_kill () +{ + if (sr_get_debug ()) + printf_filtered ("gdbsim_kill\n"); + + /* There is no need to `kill' running simulator - the simulator is + not running */ + inferior_pid = 0; +} + +/* Load an executable file into the target process. This is expected to + not only bring new code into the target process, but also to update + GDB's symbol tables to match. */ + +static void +gdbsim_load (prog, fromtty) + char *prog; + int fromtty; +{ + if (sr_get_debug ()) + printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); + + inferior_pid = 0; + + /* FIXME: We will print two messages on error. + Need error to either not print anything if passed NULL or need + another routine that doesn't take any arguments. */ + if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) + error ("unable to load program"); + + /* FIXME: If a load command should reset the targets registers then + a call to sim_create_inferior() should go here. */ + + program_loaded = 1; +} + + +/* Start an inferior process and set inferior_pid to its pid. + EXEC_FILE is the file to run. + ARGS is a string containing the arguments to the program. + ENV is the environment vector to pass. Errors reported with error(). + On VxWorks and various standalone systems, we ignore exec_file. */ +/* This is called not only when we first attach, but also when the + user types "run" after having attached. */ + +static void +gdbsim_create_inferior (exec_file, args, env) + char *exec_file; + char *args; + char **env; +{ + int len; + char *arg_buf,**argv; + + if (exec_file == 0 || exec_bfd == 0) + warning ("No executable file specified."); + if (! program_loaded) + warning ("No program loaded."); + + if (sr_get_debug ()) + printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", + (exec_file ? exec_file: "(NULL)"), + args); + + gdbsim_kill (); + remove_breakpoints (); + init_wait_for_inferior (); + + if (exec_file != NULL) + { + len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; + arg_buf = (char *) alloca (len); + arg_buf[0] = '\0'; + strcat (arg_buf, exec_file); + strcat (arg_buf, " "); + strcat (arg_buf, args); + argv = buildargv (arg_buf); + make_cleanup ((make_cleanup_func) freeargv, argv); + } + else + argv = NULL; + sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); + + inferior_pid = 42; + insert_breakpoints (); /* Needed to get correct instruction in cache */ + + clear_proceed_status (); + + /* NB: Entry point already set by sim_create_inferior. */ + proceed ((CORE_ADDR)-1, TARGET_SIGNAL_DEFAULT, 0); +} + +/* The open routine takes the rest of the parameters from the command, + and (if successful) pushes a new target onto the stack. + Targets should supply this routine, if only to provide an error message. */ +/* Called when selecting the simulator. EG: (gdb) target sim name. */ + +static void +gdbsim_open (args, from_tty) + char *args; + int from_tty; +{ + int len; + char *arg_buf; + char **argv; + + if (sr_get_debug ()) + printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); + + /* Remove current simulator if one exists. Only do this if the simulator + has been opened because sim_close requires it. + This is important because the call to push_target below will cause + sim_close to be called if the simulator is already open, but push_target + is called after sim_open! We can't move the call to push_target before + the call to sim_open because sim_open may invoke `error'. */ + if (gdbsim_desc != NULL) + unpush_target (&gdbsim_ops); + + len = (7 + 1 /* gdbsim */ + + strlen (" -E little") + + strlen (" --architecture=xxxxxxxxxx") + + (args ? strlen (args) : 0) + + 50) /* slack */; + arg_buf = (char *) alloca (len); + strcpy (arg_buf, "gdbsim"); /* 7 */ + /* Specify the byte order for the target when it is both selectable + and explicitly specified by the user (not auto detected). */ + if (TARGET_BYTE_ORDER_SELECTABLE_P + && !TARGET_BYTE_ORDER_AUTO) + { + switch (TARGET_BYTE_ORDER) + { + case BIG_ENDIAN: + strcat (arg_buf, " -E big"); + break; + case LITTLE_ENDIAN: + strcat (arg_buf, " -E little"); + break; + default: + fatal ("Value of TARGET_BYTE_ORDER unknown"); + } + } + /* Specify the architecture of the target when it has been + explicitly specified */ + if (!TARGET_ARCHITECTURE_AUTO) + { + strcat (arg_buf, " --architecture="); + strcat (arg_buf, TARGET_ARCHITECTURE->printable_name); + } + /* finally, any explicit args */ + if (args) + { + strcat (arg_buf, " "); /* 1 */ + strcat (arg_buf, args); + } + argv = buildargv (arg_buf); + if (argv == NULL) + error ("Insufficient memory available to allocate simulator arg list."); + make_cleanup ((make_cleanup_func) freeargv, argv); + + init_callbacks (); + gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); + + if (gdbsim_desc == 0) + error ("unable to create simulator instance"); + + push_target (&gdbsim_ops); + target_fetch_registers (-1); + printf_filtered ("Connected to the simulator.\n"); +} + +/* Does whatever cleanup is required for a target that we are no longer + going to be calling. Argument says whether we are quitting gdb and + should not get hung in case of errors, or whether we want a clean + termination even if it takes a while. This routine is automatically + always called just before a routine is popped off the target stack. + Closing file descriptors and freeing memory are typical things it should + do. */ +/* Close out all files and local state before this target loses control. */ + +static void +gdbsim_close (quitting) + int quitting; +{ + if (sr_get_debug ()) + printf_filtered ("gdbsim_close: quitting %d\n", quitting); + + program_loaded = 0; + + if (gdbsim_desc != NULL) + { + sim_close (gdbsim_desc, quitting); + gdbsim_desc = NULL; + } + + end_callbacks (); +} + +/* Takes a program previously attached to and detaches it. + The program may resume execution (some targets do, some don't) and will + no longer stop on signals, etc. We better not have left any breakpoints + in the program or it'll die when it hits one. ARGS is arguments + typed by the user (e.g. a signal to send the process). FROM_TTY + says whether to be verbose or not. */ +/* Terminate the open connection to the remote debugger. + Use this when you want to detach and do something else with your gdb. */ + +static void +gdbsim_detach (args,from_tty) + char *args; + int from_tty; +{ + if (sr_get_debug ()) + printf_filtered ("gdbsim_detach: args \"%s\"\n", args); + + pop_target (); /* calls gdbsim_close to do the real work */ + if (from_tty) + printf_filtered ("Ending simulator %s debugging\n", target_shortname); +} + +/* Resume execution of the target process. STEP says whether to single-step + or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given + to the target, or zero for no signal. */ + +static enum target_signal resume_siggnal; +static int resume_step; + +static void +gdbsim_resume (pid, step, siggnal) + int pid, step; + enum target_signal siggnal; +{ + if (inferior_pid != 42) + error ("The program is not being run."); + + if (sr_get_debug ()) + printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); + + resume_siggnal = siggnal; + resume_step = step; +} + +/* Notify the simulator of an asynchronous request to stop. + + The simulator shall ensure that the stop request is eventually + delivered to the simulator. If the call is made while the + simulator is not running then the stop request is processed when + the simulator is next resumed. + + For simulators that do not support this operation, just abort */ + +static void +gdbsim_stop () +{ + if (! sim_stop (gdbsim_desc)) + { + quit (); + } +} + +/* GDB version of os_poll_quit callback. + Taken from gdb/util.c - should be in a library */ + +static int +gdb_os_poll_quit (p) + host_callback *p; +{ + notice_quit (); + if (quit_flag) /* gdb's idea of quit */ + { + quit_flag = 0; /* we've stolen it */ + return 1; + } + else if (immediate_quit) + { + return 1; + } + return 0; +} + +/* Wait for inferior process to do something. Return pid of child, + or -1 in case of error; store status through argument pointer STATUS, + just as `wait' would. */ + +static void +gdbsim_cntrl_c (signo) + int signo; +{ + gdbsim_stop (); +} + +static int +gdbsim_wait (pid, status) + int pid; + struct target_waitstatus *status; +{ + static RETSIGTYPE (*prev_sigint) (); + int sigrc = 0; + enum sim_stop reason = sim_running; + + if (sr_get_debug ()) + printf_filtered ("gdbsim_wait\n"); + +#if defined (HAVE_SIGACTION) && defined (SA_RESTART) + { + struct sigaction sa, osa; + sa.sa_handler = gdbsim_cntrl_c; + sigemptyset (&sa.sa_mask); + sa.sa_flags = 0; + sigaction (SIGINT, &sa, &osa); + prev_sigint = osa.sa_handler; + } +#else + prev_sigint = signal (SIGINT, gdbsim_cntrl_c); +#endif + sim_resume (gdbsim_desc, resume_step, + target_signal_to_host (resume_siggnal)); + signal (SIGINT, prev_sigint); + resume_step = 0; + + sim_stop_reason (gdbsim_desc, &reason, &sigrc); + + switch (reason) + { + case sim_exited: + status->kind = TARGET_WAITKIND_EXITED; + status->value.integer = sigrc; + break; + case sim_stopped: + switch (sigrc) + { + case SIGABRT: + quit (); + break; + case SIGINT: + case SIGTRAP: + default: + status->kind = TARGET_WAITKIND_STOPPED; + /* The signal in sigrc is a host signal. That probably + should be fixed. */ + status->value.sig = target_signal_from_host (sigrc); + break; + } + break; + case sim_signalled: + status->kind = TARGET_WAITKIND_SIGNALLED; + /* The signal in sigrc is a host signal. That probably + should be fixed. */ + status->value.sig = target_signal_from_host (sigrc); + break; + case sim_running: + case sim_polling: + /* FIXME: Is this correct? */ + break; + } + + return inferior_pid; +} + +/* Get ready to modify the registers array. On machines which store + individual registers, this doesn't need to do anything. On machines + which store all the registers in one fell swoop, this makes sure + that registers contains all the registers from the program being + debugged. */ + +static void +gdbsim_prepare_to_store () +{ + /* Do nothing, since we can store individual regs */ +} + +static int +gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) + CORE_ADDR memaddr; + char *myaddr; + int len; + int write; + struct target_ops *target; /* ignored */ +{ + if (! program_loaded) + error ("No program loaded."); + + if (sr_get_debug ()) + { + printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", + myaddr, memaddr, len, write); + if (sr_get_debug () && write) + dump_mem(myaddr, len); + } + + if (write) + { + len = sim_write (gdbsim_desc, memaddr, myaddr, len); + } + else + { + len = sim_read (gdbsim_desc, memaddr, myaddr, len); + if (sr_get_debug () && len > 0) + dump_mem(myaddr, len); + } + return len; +} + +static void +gdbsim_files_info (target) + struct target_ops *target; +{ + char *file = "nothing"; + + if (exec_bfd) + file = bfd_get_filename (exec_bfd); + + if (sr_get_debug ()) + printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); + + if (exec_bfd) + { + printf_filtered ("\tAttached to %s running program %s\n", + target_shortname, file); + sim_info (gdbsim_desc, 0); + } +} + +/* Clear the simulator's notion of what the break points are. */ + +static void +gdbsim_mourn_inferior () +{ + if (sr_get_debug ()) + printf_filtered ("gdbsim_mourn_inferior:\n"); + + remove_breakpoints (); + generic_mourn_inferior (); +} + +static int +gdbsim_insert_breakpoint (addr, contents_cache) + CORE_ADDR addr; + char *contents_cache; +{ +#ifdef SIM_HAS_BREAKPOINTS + SIM_RC retcode; + + retcode = sim_set_breakpoint (gdbsim_desc, addr); + + switch (retcode) + { + case SIM_RC_OK: + return 0; + case SIM_RC_INSUFFICIENT_RESOURCES: + return ENOMEM; + default: + return EIO; + } +#else + return memory_insert_breakpoint (addr, contents_cache); +#endif +} + +static int +gdbsim_remove_breakpoint (addr, contents_cache) + CORE_ADDR addr; + char *contents_cache; +{ +#ifdef SIM_HAS_BREAKPOINTS + SIM_RC retcode; + + retcode = sim_clear_breakpoint (gdbsim_desc, addr); + + switch (retcode) + { + case SIM_RC_OK: + case SIM_RC_UNKNOWN_BREAKPOINT: + return 0; + case SIM_RC_INSUFFICIENT_RESOURCES: + return ENOMEM; + default: + return EIO; + } +#else + return memory_remove_breakpoint (addr, contents_cache); +#endif +} + +/* Pass the command argument through to the simulator verbatim. The + simulator must do any command interpretation work. */ + +void +simulator_command (args, from_tty) + char *args; + int from_tty; +{ + if (gdbsim_desc == NULL) + { + + /* PREVIOUSLY: The user may give a command before the simulator + is opened. [...] (??? assuming of course one wishes to + continue to allow commands to be sent to unopened simulators, + which isn't entirely unreasonable). */ + + /* The simulator is a builtin abstraction of a remote target. + Consistent with that model, access to the simulator, via sim + commands, is restricted to the period when the channel to the + simulator is open. */ + + error ("Not connected to the simulator target"); + } + + sim_do_command (gdbsim_desc, args); + + /* Invalidate the register cache, in case the simulator command does + something funny. */ + registers_changed (); +} + +/* Define the target subroutine names */ + +struct target_ops gdbsim_ops ; + +static void +init_gdbsim_ops(void) +{ + gdbsim_ops.to_shortname = "sim"; + gdbsim_ops.to_longname = "simulator"; + gdbsim_ops.to_doc = "Use the compiled-in simulator."; + gdbsim_ops.to_open = gdbsim_open; + gdbsim_ops.to_close = gdbsim_close; + gdbsim_ops.to_attach = NULL; + gdbsim_ops.to_post_attach = NULL; + gdbsim_ops.to_require_attach = NULL; + gdbsim_ops.to_detach = gdbsim_detach; + gdbsim_ops.to_require_detach = NULL; + gdbsim_ops.to_resume = gdbsim_resume; + gdbsim_ops.to_wait = gdbsim_wait; + gdbsim_ops.to_post_wait = NULL; + gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; + gdbsim_ops.to_store_registers = gdbsim_store_register; + gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; + gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; + gdbsim_ops.to_files_info = gdbsim_files_info; + gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; + gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; + gdbsim_ops.to_terminal_init = NULL; + gdbsim_ops.to_terminal_inferior = NULL; + gdbsim_ops.to_terminal_ours_for_output = NULL; + gdbsim_ops.to_terminal_ours = NULL; + gdbsim_ops.to_terminal_info = NULL; + gdbsim_ops.to_kill = gdbsim_kill; + gdbsim_ops.to_load = gdbsim_load; + gdbsim_ops.to_lookup_symbol = NULL; + gdbsim_ops.to_create_inferior = gdbsim_create_inferior; + gdbsim_ops.to_post_startup_inferior = NULL; + gdbsim_ops.to_acknowledge_created_inferior = NULL; + gdbsim_ops.to_clone_and_follow_inferior = NULL; + gdbsim_ops.to_post_follow_inferior_by_clone = NULL; + gdbsim_ops.to_insert_fork_catchpoint = NULL; + gdbsim_ops.to_remove_fork_catchpoint = NULL; + gdbsim_ops.to_insert_vfork_catchpoint = NULL; + gdbsim_ops.to_remove_vfork_catchpoint = NULL; + gdbsim_ops.to_has_forked = NULL; + gdbsim_ops.to_has_vforked = NULL; + gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL; + gdbsim_ops.to_post_follow_vfork = NULL; + gdbsim_ops.to_insert_exec_catchpoint = NULL; + gdbsim_ops.to_remove_exec_catchpoint = NULL; + gdbsim_ops.to_has_execd = NULL; + gdbsim_ops.to_reported_exec_events_per_exec_call = NULL; + gdbsim_ops.to_has_exited = NULL; + gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; + gdbsim_ops.to_can_run = 0; + gdbsim_ops.to_notice_signals = 0; + gdbsim_ops.to_thread_alive = 0; + gdbsim_ops.to_stop = gdbsim_stop; + gdbsim_ops.to_pid_to_exec_file = NULL; + gdbsim_ops.to_core_file_to_sym_file = NULL; + gdbsim_ops.to_stratum = process_stratum; + gdbsim_ops.DONT_USE = NULL; + gdbsim_ops.to_has_all_memory = 1; + gdbsim_ops.to_has_memory = 1; + gdbsim_ops.to_has_stack = 1; + gdbsim_ops.to_has_registers = 1; + gdbsim_ops.to_has_execution = 1; + gdbsim_ops.to_sections = NULL; + gdbsim_ops.to_sections_end = NULL; + gdbsim_ops.to_magic = OPS_MAGIC; + +#ifdef TARGET_REDEFINE_DEFAULT_OPS + TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); +#endif +} + +void +_initialize_remote_sim () +{ + init_gdbsim_ops() ; + add_target (&gdbsim_ops); + + add_com ("sim <command>", class_obscure, simulator_command, + "Send a command to the simulator."); +} |