sim/rl78/load.c

   1 /* load.c --- loading object files into the RL78 simulator.
   2
   3    Copyright (C) 2005-2017 Free Software Foundation, Inc.
   4    Contributed by Red Hat, Inc.
   5
   6    This file is part of the GNU simulators.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22
  23 #include "config.h"
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "libiberty.h"
  29 #include "bfd.h"
  30 #include "elf-bfd.h"
  31 #include "elf/rl78.h"
  32 #include "cpu.h"
  33 #include "mem.h"
  34 #include "load.h"
  35 #include "elf/internal.h"
  36 #include "elf/common.h"
  37
  38 /* Helper function for invoking a GDB-specified printf.  */
  39 static void
  40 xprintf (host_callback *callback, const char *fmt, ...)
  41 {
  42   va_list ap;
  43
  44   va_start (ap, fmt);
  45
  46   (*callback->vprintf_filtered) (callback, fmt, ap);
  47
  48   va_end (ap);
  49 }
  50
  51 /* Given a file offset, look up the section name.  */
  52 static const char *
  53 find_section_name_by_offset (bfd *abfd, file_ptr filepos)
  54 {
  55   asection *s;
  56
  57   for (s = abfd->sections; s; s = s->next)
  58     if (s->filepos == filepos)
  59       return bfd_get_section_name (abfd, s);
  60
  61   return "(unknown)";
  62 }
  63
  64 void
  65 rl78_load (bfd *prog, host_callback *callbacks, const char * const simname)
  66 {
  67   Elf_Internal_Phdr * phdrs;
  68   long sizeof_phdrs;
  69   int num_headers;
  70   int i;
  71   int max_rom = 0;
  72
  73   init_cpu ();
  74
  75   /* Note we load by ELF program header not by BFD sections.
  76      This is because BFD sections get their information from
  77      the ELF section structure, which only includes a VMA value
  78      and not an LMA value.  */
  79   sizeof_phdrs = bfd_get_elf_phdr_upper_bound (prog);
  80   if (sizeof_phdrs == 0)
  81     {
  82       fprintf (stderr, "%s: Failed to get size of program headers\n", simname);
  83       return;
  84     }
  85   phdrs = xmalloc (sizeof_phdrs);
  86
  87   num_headers = bfd_get_elf_phdrs (prog, phdrs);
  88   if (num_headers < 1)
  89     {
  90       fprintf (stderr, "%s: Failed to read program headers\n", simname);
  91       return;
  92     }
  93
  94   switch (elf_elfheader (prog)->e_flags & E_FLAG_RL78_CPU_MASK)
  95     {
  96     case E_FLAG_RL78_G10:
  97       rl78_g10_mode = 1;
  98       g13_multiply = 0;
  99       g14_multiply = 0;
 100       mem_set_mirror (0, 0xf8000, 4096);
 101       break;
 102     case E_FLAG_RL78_G13:
 103       rl78_g10_mode = 0;
 104       g13_multiply = 1;
 105       g14_multiply = 0;
 106       break;
 107     case E_FLAG_RL78_G14:
 108       rl78_g10_mode = 0;
 109       g13_multiply = 0;
 110       g14_multiply = 1;
 111       break;
 112     default:
 113       /* Keep whatever was manually specified.  */
 114       break;
 115     }
 116
 117   for (i = 0; i < num_headers; i++)
 118     {
 119       Elf_Internal_Phdr * p = phdrs + i;
 120       char *buf;
 121       bfd_vma size;
 122       bfd_vma base;
 123       file_ptr offset;
 124
 125       size = p->p_filesz;
 126       if (size <= 0)
 127         continue;
 128
 129       base = p->p_paddr;
 130       if (verbose > 1)
 131         fprintf (stderr, "[load segment: lma=%08x vma=%08x size=%08x]\n",
 132                  (int) base, (int) p->p_vaddr, (int) size);
 133       if (callbacks)
 134         xprintf (callbacks,
 135                  "Loading section %s, size %#lx lma %08lx vma %08lx\n",
 136                  find_section_name_by_offset (prog, p->p_offset),
 137                  size, base, p->p_vaddr);
 138
 139       buf = xmalloc (size);
 140
 141       offset = p->p_offset;
 142       if (bfd_seek (prog, offset, SEEK_SET) != 0)
 143         {
 144           fprintf (stderr, "%s, Failed to seek to offset %lx\n", simname, (long) offset);
 145           continue;
 146         }
 147
 148       if (bfd_bread (buf, size, prog) != size)
 149         {
 150           fprintf (stderr, "%s: Failed to read %lx bytes\n", simname, size);
 151           continue;
 152         }
 153
 154       if (base > 0xeffff || base + size > 0xeffff)
 155         {
 156           fprintf (stderr, "%s, Can't load image to RAM/SFR space: 0x%lx - 0x%lx\n",
 157                    simname, base, base+size);
 158           continue;
 159         }
 160       if (max_rom < base + size)
 161         max_rom = base + size;
 162
 163       mem_put_blk (base, buf, size);
 164       free (buf);
 165     }
 166
 167   free (phdrs);
 168
 169   mem_rom_size (max_rom);
 170
 171   pc = prog->start_address;
 172
 173   if (strcmp (bfd_get_target (prog), "srec") == 0
 174       || pc == 0)
 175     {
 176       pc = mem_get_hi (0);
 177     }
 178
 179   if (verbose > 1)
 180     fprintf (stderr, "[start pc=%08x]\n", (unsigned int) pc);
 181 }