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Diffstat (limited to 'sim/ppc/sim_calls.c')
| -rw-r--r-- | sim/ppc/sim_calls.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/sim/ppc/sim_calls.c b/sim/ppc/sim_calls.c new file mode 100644 index 00000000000..bb845397152 --- /dev/null +++ b/sim/ppc/sim_calls.c @@ -0,0 +1,445 @@ +/* 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" + + +/* 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 reg_names array to map GDB register numbers onto + names, which we can then look up in the register table. + + We used to just use the REGISTER_NAMES macro, from GDB's + target-dependent header files. That was kind of nice, because it + meant that libsim.a had only a compile-time dependency on GDB; + using reg_names directly means that there are now link-time and + run-time dependencies too. + + However, the GDB PPC back-end now modifies the reg_names array when + the user runs the `set processor' command, which affects the + meanings of the register numbers. So the sim needs to see the + register names GDB is actually using. + + Perhaps the host_callback structure could contain a pointer to the + register name table; 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 + REG_NAMES, 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 = REGISTER_NAME (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 = REGISTER_NAME (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) + { + 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); +} |