408 lines
9.3 KiB
C
408 lines
9.3 KiB
C
/* Miscellaneous simulator utilities.
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Copyright (C) 1997, 1998, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "sim-main.h"
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#include "sim-assert.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h> /* needed by sys/resource.h */
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#include "libiberty.h"
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#include "bfd.h"
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#include "sim-utils.h"
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/* Global pointer to all state data.
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Set by sim_resume. */
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struct sim_state *current_state;
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/* Allocate zero filled memory with xcalloc - xcalloc aborts if the
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allocation fails. */
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void *
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zalloc (unsigned long size)
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{
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return xcalloc (1, size);
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}
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void
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zfree (void *data)
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{
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free (data);
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}
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/* Allocate a sim_state struct. */
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SIM_DESC
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sim_state_alloc (SIM_OPEN_KIND kind,
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host_callback *callback)
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{
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SIM_DESC sd = ZALLOC (struct sim_state);
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STATE_MAGIC (sd) = SIM_MAGIC_NUMBER;
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STATE_CALLBACK (sd) = callback;
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STATE_OPEN_KIND (sd) = kind;
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#if 0
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{
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int cpu_nr;
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/* Initialize the back link from the cpu struct to the state struct. */
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/* ??? I can envision a design where the state struct contains an array
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of pointers to cpu structs, rather than an array of structs themselves.
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Implementing this is trickier as one may not know what to allocate until
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one has parsed the args. Parsing the args twice wouldn't be unreasonable,
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IMHO. If the state struct ever does contain an array of pointers then we
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can't do this here.
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??? See also sim_post_argv_init*/
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for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
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{
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CPU_STATE (STATE_CPU (sd, cpu_nr)) = sd;
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CPU_INDEX (STATE_CPU (sd, cpu_nr)) = cpu_nr;
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}
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}
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#endif
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#ifdef SIM_STATE_INIT
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SIM_STATE_INIT (sd);
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#endif
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return sd;
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}
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/* Free a sim_state struct. */
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void
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sim_state_free (SIM_DESC sd)
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{
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ASSERT (sd->base.magic == SIM_MAGIC_NUMBER);
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#ifdef SIM_STATE_FREE
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SIM_STATE_FREE (sd);
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#endif
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zfree (sd);
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}
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/* Return a pointer to the cpu data for CPU_NAME, or NULL if not found. */
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sim_cpu *
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sim_cpu_lookup (SIM_DESC sd, const char *cpu_name)
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{
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int i;
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for (i = 0; i < MAX_NR_PROCESSORS; ++i)
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if (strcmp (cpu_name, CPU_NAME (STATE_CPU (sd, i))) == 0)
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return STATE_CPU (sd, i);
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return NULL;
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}
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/* Return the prefix to use for a CPU specific message (typically an
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error message). */
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const char *
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sim_cpu_msg_prefix (sim_cpu *cpu)
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{
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#if MAX_NR_PROCESSORS == 1
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return "";
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#else
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static char *prefix;
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if (prefix == NULL)
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{
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int maxlen = 0;
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for (i = 0; i < MAX_NR_PROCESSORS; ++i)
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{
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int len = strlen (CPU_NAME (STATE_CPU (sd, i)));
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if (len > maxlen)
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maxlen = len;
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}
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prefix = (char *) xmalloc (maxlen + 5);
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}
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sprintf (prefix, "%s: ", CPU_NAME (cpu));
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return prefix;
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#endif
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}
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/* Cover fn to sim_io_eprintf. */
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void
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sim_io_eprintf_cpu (sim_cpu *cpu, const char *fmt, ...)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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va_list ap;
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va_start (ap, fmt);
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sim_io_eprintf (sd, "%s", sim_cpu_msg_prefix (cpu));
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sim_io_evprintf (sd, fmt, ap);
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va_end (ap);
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}
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/* Turn VALUE into a string with commas. */
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char *
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sim_add_commas (char *buf, int sizeof_buf, unsigned long value)
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{
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int comma = 3;
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char *endbuf = buf + sizeof_buf - 1;
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*--endbuf = '\0';
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do {
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if (comma-- == 0)
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{
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*--endbuf = ',';
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comma = 2;
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}
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*--endbuf = (value % 10) + '0';
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} while ((value /= 10) != 0);
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return endbuf;
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}
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/* Analyze PROG_NAME/PROG_BFD and set these fields in the state struct:
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STATE_ARCHITECTURE, if not set already and can be determined from the bfd
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STATE_PROG_BFD
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STATE_START_ADDR
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STATE_TEXT_SECTION
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STATE_TEXT_START
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STATE_TEXT_END
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PROG_NAME is the file name of the executable or NULL.
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PROG_BFD is its bfd or NULL.
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If both PROG_NAME and PROG_BFD are NULL, this function returns immediately.
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If PROG_BFD is not NULL, PROG_NAME is ignored.
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Implicit inputs: STATE_MY_NAME(sd), STATE_TARGET(sd),
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STATE_ARCHITECTURE(sd).
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A new bfd is created so the app isn't required to keep its copy of the
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bfd open. */
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SIM_RC
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sim_analyze_program (SIM_DESC sd, char *prog_name, bfd *prog_bfd)
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{
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asection *s;
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SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
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if (prog_bfd != NULL)
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{
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if (prog_bfd == STATE_PROG_BFD (sd))
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/* already analyzed */
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return SIM_RC_OK;
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else
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/* duplicate needed, save the name of the file to be re-opened */
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prog_name = bfd_get_filename (prog_bfd);
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}
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/* do we need to duplicate anything? */
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if (prog_name == NULL)
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return SIM_RC_OK;
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/* open a new copy of the prog_bfd */
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prog_bfd = bfd_openr (prog_name, STATE_TARGET (sd));
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if (prog_bfd == NULL)
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{
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sim_io_eprintf (sd, "%s: can't open \"%s\": %s\n",
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STATE_MY_NAME (sd),
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prog_name,
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bfd_errmsg (bfd_get_error ()));
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return SIM_RC_FAIL;
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}
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if (!bfd_check_format (prog_bfd, bfd_object))
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{
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sim_io_eprintf (sd, "%s: \"%s\" is not an object file: %s\n",
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STATE_MY_NAME (sd),
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prog_name,
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bfd_errmsg (bfd_get_error ()));
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bfd_close (prog_bfd);
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return SIM_RC_FAIL;
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}
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if (STATE_ARCHITECTURE (sd) != NULL)
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bfd_set_arch_info (prog_bfd, STATE_ARCHITECTURE (sd));
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else
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{
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if (bfd_get_arch (prog_bfd) != bfd_arch_unknown
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&& bfd_get_arch (prog_bfd) != bfd_arch_obscure)
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{
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STATE_ARCHITECTURE (sd) = bfd_get_arch_info (prog_bfd);
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}
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}
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/* update the sim structure */
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if (STATE_PROG_BFD (sd) != NULL)
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bfd_close (STATE_PROG_BFD (sd));
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STATE_PROG_BFD (sd) = prog_bfd;
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STATE_START_ADDR (sd) = bfd_get_start_address (prog_bfd);
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for (s = prog_bfd->sections; s; s = s->next)
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if (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)
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{
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STATE_TEXT_SECTION (sd) = s;
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STATE_TEXT_START (sd) = bfd_get_section_vma (prog_bfd, s);
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STATE_TEXT_END (sd) = STATE_TEXT_START (sd) + bfd_section_size (prog_bfd, s);
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break;
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}
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bfd_cache_close (prog_bfd);
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return SIM_RC_OK;
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}
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/* Simulator timing support. */
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/* Called before sim_elapsed_time_since to get a reference point. */
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SIM_ELAPSED_TIME
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sim_elapsed_time_get (void)
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{
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#ifdef HAVE_GETRUSAGE
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struct rusage mytime;
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if (getrusage (RUSAGE_SELF, &mytime) == 0)
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return 1 + (SIM_ELAPSED_TIME) (((double) mytime.ru_utime.tv_sec * 1000) + (((double) mytime.ru_utime.tv_usec + 500) / 1000));
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return 1;
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#else
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#ifdef HAVE_TIME
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return 1 + (SIM_ELAPSED_TIME) time ((time_t) 0);
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#else
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return 1;
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#endif
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#endif
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}
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/* Return the elapsed time in milliseconds since START.
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The actual time may be cpu usage (preferred) or wall clock. */
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unsigned long
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sim_elapsed_time_since (SIM_ELAPSED_TIME start)
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{
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#ifdef HAVE_GETRUSAGE
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return sim_elapsed_time_get () - start;
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#else
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#ifdef HAVE_TIME
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return (sim_elapsed_time_get () - start) * 1000;
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#else
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return 0;
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#endif
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#endif
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}
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/* do_command but with printf style formatting of the arguments */
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void
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sim_do_commandf (SIM_DESC sd,
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const char *fmt,
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...)
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{
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va_list ap;
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char *buf;
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va_start (ap, fmt);
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vasprintf (&buf, fmt, ap);
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sim_do_command (sd, buf);
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va_end (ap);
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free (buf);
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}
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/* sim-basics.h defines a number of enumerations, convert each of them
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to a string representation */
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const char *
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map_to_str (unsigned map)
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{
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switch (map)
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{
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case read_map: return "read";
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case write_map: return "write";
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case exec_map: return "exec";
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case io_map: return "io";
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default:
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{
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static char str[10];
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sprintf (str, "(%ld)", (long) map);
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return str;
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}
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}
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}
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const char *
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access_to_str (unsigned access)
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{
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switch (access)
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{
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case access_invalid: return "invalid";
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case access_read: return "read";
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case access_write: return "write";
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case access_exec: return "exec";
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case access_io: return "io";
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case access_read_write: return "read_write";
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case access_read_exec: return "read_exec";
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case access_write_exec: return "write_exec";
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case access_read_write_exec: return "read_write_exec";
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case access_read_io: return "read_io";
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case access_write_io: return "write_io";
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case access_read_write_io: return "read_write_io";
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case access_exec_io: return "exec_io";
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case access_read_exec_io: return "read_exec_io";
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case access_write_exec_io: return "write_exec_io";
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case access_read_write_exec_io: return "read_write_exec_io";
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default:
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{
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static char str[10];
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sprintf (str, "(%ld)", (long) access);
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return str;
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}
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}
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}
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const char *
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transfer_to_str (unsigned transfer)
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{
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switch (transfer)
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{
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case read_transfer: return "read";
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case write_transfer: return "write";
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default: return "(error)";
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}
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}
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