| /* This file is part of the program psim. |
| |
| Copyright (C) 1994-1996,1998, Andrew Cagney <cagney@highland.com.au> |
| |
| 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 <signal.h> /* FIXME - should be machine dependant version */ |
| #include <stdarg.h> |
| #include <ctype.h> |
| |
| #include "psim.h" |
| #include "options.h" |
| |
| #undef printf_filtered /* blow away the mapping */ |
| |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #else |
| #ifdef HAVE_STRINGS_H |
| #include <strings.h> |
| #endif |
| #endif |
| |
| #include "defs.h" |
| #include "bfd.h" |
| #include "callback.h" |
| #include "remote-sim.h" |
| |
| /* Define the rate at which the simulator should poll the host |
| for a quit. */ |
| #ifndef POLL_QUIT_INTERVAL |
| #define POLL_QUIT_INTERVAL 0x20 |
| #endif |
| |
| static int poll_quit_count = POLL_QUIT_INTERVAL; |
| |
| /* Structures used by the simulator, for gdb just have static structures */ |
| |
| static psim *simulator; |
| static device *root_device; |
| static host_callback *callbacks; |
| |
| /* We use GDB's gdbarch_register_name function to map GDB register |
| numbers onto names, which we can then look up in the register |
| table. Since the `set architecture' command can select a new |
| processor variant at run-time, the meanings of the register numbers |
| can change, so we need to make sure the sim uses the same |
| name/number mapping that GDB uses. |
| |
| (We don't use the REGISTER_NAME macro, which is a wrapper for |
| gdbarch_register_name. We #include GDB's "defs.h", which tries to |
| #include GDB's "config.h", but gets ours instead, and REGISTER_NAME |
| ends up not getting defined. Simpler to just use |
| gdbarch_register_name directly.) |
| |
| We used to just use the REGISTER_NAMES macro from GDB's |
| target-dependent header files, which expanded into an initializer |
| for an array of strings. That was kind of nice, because it meant |
| that libsim.a had only a compile-time dependency on GDB; using |
| gdbarch_register_name directly means that there are now link-time |
| and run-time dependencies too. |
| |
| Perhaps the host_callback structure could provide a function for |
| retrieving register names; that would be cleaner. */ |
| |
| SIM_DESC |
| sim_open (SIM_OPEN_KIND kind, |
| host_callback *callback, |
| struct _bfd *abfd, |
| char **argv) |
| { |
| callbacks = callback; |
| |
| /* Note: The simulation is not created by sim_open() because |
| complete information is not yet available */ |
| /* trace the call */ |
| TRACE(trace_gdb, ("sim_open called\n")); |
| |
| if (root_device != NULL) |
| sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n"); |
| root_device = psim_tree(); |
| simulator = NULL; |
| |
| psim_options(root_device, argv + 1); |
| |
| if (ppc_trace[trace_opts]) |
| print_options (); |
| |
| /* fudge our descriptor for now */ |
| return (SIM_DESC) 1; |
| } |
| |
| |
| void |
| sim_close (SIM_DESC sd, int quitting) |
| { |
| TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting)); |
| if (ppc_trace[trace_print_info] && simulator != NULL) |
| psim_print_info (simulator, ppc_trace[trace_print_info]); |
| } |
| |
| |
| SIM_RC |
| sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty) |
| { |
| TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n", |
| prog, from_tty)); |
| ASSERT(prog != NULL); |
| |
| /* create the simulator */ |
| TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n")); |
| simulator = psim_create(prog, root_device); |
| |
| /* bring in all the data section */ |
| psim_init(simulator); |
| |
| /* get the start address */ |
| if (abfd == NULL) |
| { |
| abfd = bfd_openr (prog, 0); |
| if (abfd == NULL) |
| error ("psim: can't open \"%s\": %s\n", |
| prog, bfd_errmsg (bfd_get_error ())); |
| if (!bfd_check_format (abfd, bfd_object)) |
| { |
| const char *errmsg = bfd_errmsg (bfd_get_error ()); |
| bfd_close (abfd); |
| error ("psim: \"%s\" is not an object file: %s\n", |
| prog, errmsg); |
| } |
| bfd_close (abfd); |
| } |
| |
| return SIM_RC_OK; |
| } |
| |
| |
| int |
| sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) |
| { |
| int result = psim_read_memory(simulator, MAX_NR_PROCESSORS, |
| buf, mem, length); |
| TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n", |
| (long)mem, (long)buf, length, result)); |
| return result; |
| } |
| |
| |
| int |
| sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) |
| { |
| int result = psim_write_memory(simulator, MAX_NR_PROCESSORS, |
| buf, mem, length, |
| 1/*violate_ro*/); |
| TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n", |
| (long)mem, (long)buf, length, result)); |
| return result; |
| } |
| |
| |
| int |
| sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf, int length) |
| { |
| char *regname; |
| |
| if (simulator == NULL) { |
| return 0; |
| } |
| |
| /* GDB will sometimes ask for the contents of a register named ""; |
| we ignore such requests, and leave garbage in *BUF. In GDB |
| terms, the empty string means "the register with this number is |
| not present in the currently selected architecture variant." |
| That's following the kludge we're using for the MIPS processors. |
| But there are loops that just walk through the entire list of |
| names and try to get everything. */ |
| regname = gdbarch_register_name (current_gdbarch, regno); |
| if (! regname || regname[0] == '\0') |
| return -1; |
| |
| TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n", |
| regno, regname, (long)buf)); |
| psim_read_register(simulator, MAX_NR_PROCESSORS, |
| buf, regname, raw_transfer); |
| return -1; |
| } |
| |
| |
| int |
| sim_store_register (SIM_DESC sd, int regno, unsigned char *buf, int length) |
| { |
| char *regname; |
| |
| if (simulator == NULL) |
| return 0; |
| |
| /* See comments in sim_fetch_register, above. */ |
| regname = gdbarch_register_name (current_gdbarch, regno); |
| if (! regname || regname[0] == '\0') |
| return -1; |
| |
| TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n", |
| regno, regname, (long)buf)); |
| psim_write_register(simulator, MAX_NR_PROCESSORS, |
| buf, regname, raw_transfer); |
| return -1; |
| } |
| |
| |
| void |
| sim_info (SIM_DESC sd, int verbose) |
| { |
| TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose)); |
| psim_print_info (simulator, verbose); |
| } |
| |
| |
| SIM_RC |
| sim_create_inferior (SIM_DESC sd, |
| struct _bfd *abfd, |
| char **argv, |
| char **envp) |
| { |
| unsigned_word entry_point; |
| TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n", |
| entry_point)); |
| |
| if (simulator == NULL) |
| error ("No program loaded"); |
| |
| if (abfd != NULL) |
| entry_point = bfd_get_start_address (abfd); |
| else |
| entry_point = 0xfff00000; /* ??? */ |
| |
| psim_init(simulator); |
| psim_stack(simulator, argv, envp); |
| |
| psim_write_register(simulator, -1 /* all start at same PC */, |
| &entry_point, "pc", cooked_transfer); |
| return SIM_RC_OK; |
| } |
| |
| |
| void |
| sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc) |
| { |
| psim_status status = psim_get_status(simulator); |
| |
| switch (status.reason) { |
| case was_continuing: |
| *reason = sim_stopped; |
| if (status.signal == 0) |
| *sigrc = SIGTRAP; |
| else |
| *sigrc = status.signal; |
| break; |
| case was_trap: |
| *reason = sim_stopped; |
| *sigrc = SIGTRAP; |
| break; |
| case was_exited: |
| *reason = sim_exited; |
| *sigrc = status.signal; |
| break; |
| case was_signalled: |
| *reason = sim_signalled; |
| *sigrc = status.signal; |
| break; |
| } |
| |
| TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n", |
| (long)reason, (long)*reason, (long)sigrc, (long)*sigrc)); |
| } |
| |
| |
| |
| /* Run (or resume) the program. */ |
| |
| int |
| sim_stop (SIM_DESC sd) |
| { |
| psim_stop (simulator); |
| return 1; |
| } |
| |
| void |
| sim_resume (SIM_DESC sd, int step, int siggnal) |
| { |
| TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n", |
| step, siggnal)); |
| |
| if (step) |
| { |
| psim_step (simulator); |
| } |
| else |
| { |
| psim_run (simulator); |
| } |
| } |
| |
| void |
| sim_do_command (SIM_DESC sd, char *cmd) |
| { |
| TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n", |
| cmd ? cmd : "(null)")); |
| if (cmd != NULL) { |
| char **argv = buildargv(cmd); |
| psim_command(root_device, argv); |
| freeargv(argv); |
| } |
| } |
| |
| |
| /* Polling, if required */ |
| |
| void |
| sim_io_poll_quit (void) |
| { |
| if (callbacks->poll_quit != NULL && poll_quit_count-- < 0) |
| { |
| poll_quit_count = POLL_QUIT_INTERVAL; |
| if (callbacks->poll_quit (callbacks)) |
| psim_stop (simulator); |
| } |
| } |
| |
| |
| |
| /* Map simulator IO operations onto the corresponding GDB I/O |
| functions. |
| |
| NB: Only a limited subset of operations are mapped across. More |
| advanced operations (such as dup or write) must either be mapped to |
| one of the below calls or handled internally */ |
| |
| int |
| sim_io_read_stdin(char *buf, |
| int sizeof_buf) |
| { |
| switch (CURRENT_STDIO) { |
| case DO_USE_STDIO: |
| return callbacks->read_stdin(callbacks, buf, sizeof_buf); |
| break; |
| case DONT_USE_STDIO: |
| return callbacks->read(callbacks, 0, buf, sizeof_buf); |
| break; |
| default: |
| error("sim_io_read_stdin: unaccounted switch\n"); |
| break; |
| } |
| return 0; |
| } |
| |
| int |
| sim_io_write_stdout(const char *buf, |
| int sizeof_buf) |
| { |
| switch (CURRENT_STDIO) { |
| case DO_USE_STDIO: |
| return callbacks->write_stdout(callbacks, buf, sizeof_buf); |
| break; |
| case DONT_USE_STDIO: |
| return callbacks->write(callbacks, 1, buf, sizeof_buf); |
| break; |
| default: |
| error("sim_io_write_stdout: unaccounted switch\n"); |
| break; |
| } |
| return 0; |
| } |
| |
| int |
| sim_io_write_stderr(const char *buf, |
| int sizeof_buf) |
| { |
| switch (CURRENT_STDIO) { |
| case DO_USE_STDIO: |
| /* NB: I think there should be an explicit write_stderr callback */ |
| return callbacks->write(callbacks, 3, buf, sizeof_buf); |
| break; |
| case DONT_USE_STDIO: |
| return callbacks->write(callbacks, 3, buf, sizeof_buf); |
| break; |
| default: |
| error("sim_io_write_stderr: unaccounted switch\n"); |
| break; |
| } |
| return 0; |
| } |
| |
| |
| void |
| sim_io_printf_filtered(const char *fmt, |
| ...) |
| { |
| char message[1024]; |
| va_list ap; |
| /* format the message */ |
| va_start(ap, fmt); |
| vsprintf(message, fmt, ap); |
| va_end(ap); |
| /* sanity check */ |
| if (strlen(message) >= sizeof(message)) |
| error("sim_io_printf_filtered: buffer overflow\n"); |
| callbacks->printf_filtered(callbacks, "%s", message); |
| } |
| |
| void |
| sim_io_flush_stdoutput(void) |
| { |
| switch (CURRENT_STDIO) { |
| case DO_USE_STDIO: |
| callbacks->flush_stdout (callbacks); |
| break; |
| case DONT_USE_STDIO: |
| break; |
| default: |
| error("sim_io_read_stdin: unaccounted switch\n"); |
| break; |
| } |
| } |
| |
| /****/ |
| |
| void * |
| zalloc(long size) |
| { |
| void *memory = (void*)xmalloc(size); |
| if (memory == NULL) |
| error("xmalloc failed\n"); |
| memset(memory, 0, size); |
| return memory; |
| } |
| |
| void zfree(void *data) |
| { |
| free(data); |
| } |