sim/common/sim-utils.c

   1 /* Miscellaneous simulator utilities.
   2    Copyright (C) 1997 Free Software Foundation, Inc.
   3    Contributed by Cygnus Support.
   4
   5 This file is part of GDB, the GNU debugger.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "sim-main.h"
  22 #include "sim-assert.h"
  23 #ifdef HAVE_STDLIB_H
  24 #include <stdlib.h>
  25 #endif
  26 #include "libiberty.h"
  27 #include "bfd.h"
  28
  29 /* Global pointer to all state data.
  30    Set by sim_resume.  */
  31 struct sim_state *current_state;
  32
  33 /* Allocate zero filled memory with xmalloc.  */
  34
  35 void *
  36 zalloc (unsigned long size)
  37 {
  38   void *memory = (void *) xmalloc (size);
  39   memset (memory, 0, size);
  40   return memory;
  41 }
  42
  43 void
  44 zfree (void *data)
  45 {
  46   free (data);
  47 }
  48
  49 /* Allocate a sim_state struct.  */
  50
  51 SIM_DESC
  52 sim_state_alloc (void)
  53 {
  54   SIM_DESC sd = zalloc (sizeof (struct sim_state));
  55   sd->base.magic = SIM_MAGIC_NUMBER;
  56   return sd;
  57 }
  58
  59 /* Free a sim_state struct.  */
  60
  61 void
  62 sim_state_free (SIM_DESC sd)
  63 {
  64   ASSERT (sd->base.magic == SIM_MAGIC_NUMBER);
  65   zfree (sd);
  66 }
  67
  68 /* Make a copy of ARGV.
  69    This can also be used to copy the environment vector.
  70    The result is a pointer to the malloc'd copy or NULL if insufficient
  71    memory available.  */
  72
  73 char **
  74 sim_copy_argv (argv)
  75      char **argv;
  76 {
  77   int i,argc,len;
  78   char **copy,*p;
  79
  80   argc = len = 0;
  81   if (argv)
  82     {
  83       for ( ; argv[argc]; ++argc)
  84         len += strlen (argv[argc]) + 1;
  85     }
  86
  87   copy = (char **) malloc ((argc + 1) * sizeof (char *) + len);
  88   if (copy == NULL)
  89     return NULL;
  90
  91   p = (char *) copy + (argc + 1) * sizeof (char *);
  92   for (i = 0; i < argc; ++i)
  93     {
  94       copy[i] = p;
  95       strcpy (p, argv[i]);
  96       p += strlen (argv[i]) + 1;
  97     }
  98   copy[argc] = 0;
  99
 100   return copy;
 101 }
 102
 103 /* Analyze a bfd and set various fields in the state struct.  */
 104
 105 void
 106 sim_analyze_program (sd, prog_bfd)
 107      SIM_DESC sd;
 108      bfd *prog_bfd;
 109 {
 110   asection *s;
 111
 112   STATE_PROG_BFD (sd) = prog_bfd;
 113   STATE_START_ADDR (sd) = bfd_get_start_address (prog_bfd);
 114
 115   for (s = prog_bfd->sections; s; s = s->next)
 116     if (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)
 117       {
 118         STATE_TEXT_SECTION (sd) = s;
 119         STATE_TEXT_START (sd) = bfd_get_section_vma (prog_bfd, s);
 120         STATE_TEXT_END (sd) = STATE_TEXT_START (sd) + bfd_section_size (prog_bfd, s);
 121         break;
 122       }
 123 }