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-rw-r--r--sim/ppc/sim_calls.c445
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diff --git a/sim/ppc/sim_calls.c b/sim/ppc/sim_calls.c
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+/* 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);
+}
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