sim/m32c/load.c

   1 /* load.c --- loading object files into the M32C simulator.
   2
   3 Copyright (C) 2005, 2007 Free Software Foundation, Inc.
   4 Contributed by Red Hat, Inc.
   5
   6 This file is part of the GNU simulators.
   7
   8 The GNU simulators are free software; you can redistribute them and/or
   9 modify them under the terms of the GNU General Public License as
  10 published by the Free Software Foundation; either version 2 of the
  11 License, or (at your option) any later version.
  12
  13 The GNU simulators are distributed in the hope that they will be
  14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16 General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with the GNU simulators; if not, write to the Free Software
  20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21 02110-1301, USA  */
  22
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27
  28 #include "bfd.h"
  29
  30 #include "cpu.h"
  31 #include "mem.h"
  32
  33 int (*decode_opcode) () = 0;
  34 int default_machine = 0;
  35
  36 void
  37 m32c_set_mach (unsigned long mach)
  38 {
  39   switch (mach)
  40     {
  41     case bfd_mach_m16c:
  42       m32c_set_cpu (CPU_M16C);
  43       if (verbose)
  44         fprintf (stderr, "[cpu: r8c/m16c]\n");
  45       break;
  46     case bfd_mach_m32c:
  47       m32c_set_cpu (CPU_M32C);
  48       if (verbose)
  49         fprintf (stderr, "[cpu: m32cm/m32c]\n");
  50       break;
  51     default:
  52       fprintf (stderr, "unknown m32c machine type 0x%lx\n", mach);
  53       decode_opcode = 0;
  54       break;
  55     }
  56 }
  57
  58 void
  59 m32c_load (bfd *prog)
  60 {
  61   asection *s;
  62   unsigned long mach = bfd_get_mach (prog);
  63   unsigned long highest_addr_loaded = 0;
  64
  65   if (mach == 0 && default_machine != 0)
  66     mach = default_machine;
  67
  68   m32c_set_mach (mach);
  69
  70   for (s = prog->sections; s; s = s->next)
  71     {
  72 #if 0
  73       /* This was a good idea until we started storing the RAM data in
  74          ROM, at which point everything was all messed up.  The code
  75          remains as a reminder.  */
  76       if ((s->flags & SEC_ALLOC) && !(s->flags & SEC_READONLY))
  77         {
  78           if (strcmp (bfd_get_section_name (prog, s), ".stack"))
  79             {
  80               int secend =
  81                 bfd_get_section_size (s) + bfd_section_lma (prog, s);
  82               if (heaptop < secend && bfd_section_lma (prog, s) < 0x10000)
  83                 {
  84                   heaptop = heapbottom = secend;
  85                 }
  86             }
  87         }
  88 #endif
  89       if (s->flags & SEC_LOAD)
  90         {
  91           char *buf;
  92           bfd_size_type size;
  93
  94           size = bfd_get_section_size (s);
  95           if (size <= 0)
  96             continue;
  97
  98           bfd_vma base = bfd_section_lma (prog, s);
  99           if (verbose)
 100             fprintf (stderr, "[load a=%08x s=%08x %s]\n",
 101                      (int) base, (int) size, bfd_get_section_name (prog, s));
 102           buf = (char *) malloc (size);
 103           bfd_get_section_contents (prog, s, buf, 0, size);
 104           mem_put_blk (base, buf, size);
 105           free (buf);
 106           if (highest_addr_loaded < base + size - 1 && size >= 4)
 107             highest_addr_loaded = base + size - 1;
 108         }
 109     }
 110
 111   if (strcmp (bfd_get_target (prog), "srec") == 0)
 112     {
 113       heaptop = heapbottom = 0;
 114       switch (mach)
 115         {
 116         case bfd_mach_m16c:
 117           if (highest_addr_loaded > 0x10000)
 118             regs.r_pc = mem_get_si (0x000ffffc) & membus_mask;
 119           else
 120             regs.r_pc = mem_get_si (0x000fffc) & membus_mask;
 121           break;
 122         case bfd_mach_m32c:
 123           regs.r_pc = mem_get_si (0x00fffffc) & membus_mask;
 124           break;
 125         }
 126     }
 127   else
 128     regs.r_pc = prog->start_address;
 129   if (verbose)
 130     fprintf (stderr, "[start pc=%08x]\n", (unsigned int) regs.r_pc);
 131 }