sim/rl78/load.c

   1 /* load.c --- loading object files into the RL78 simulator.
   2
   3    Copyright (C) 2005-2013 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 "libbfd.h"
  31 #include "cpu.h"
  32 #include "mem.h"
  33 #include "load.h"
  34 #include "elf/internal.h"
  35 #include "elf/common.h"
  36
  37 /* Helper function for invoking a GDB-specified printf.  */
  38 static void
  39 xprintf (host_callback *callback, const char *fmt, ...)
  40 {
  41   va_list ap;
  42
  43   va_start (ap, fmt);
  44
  45   (*callback->vprintf_filtered) (callback, fmt, ap);
  46
  47   va_end (ap);
  48 }
  49
  50 /* Given a file offset, look up the section name.  */
  51 static const char *
  52 find_section_name_by_offset (bfd *abfd, file_ptr filepos)
  53 {
  54   asection *s;
  55
  56   for (s = abfd->sections; s; s = s->next)
  57     if (s->filepos == filepos)
  58       return bfd_get_section_name (abfd, s);
  59
  60   return "(unknown)";
  61 }
  62
  63 void
  64 rl78_load (bfd *prog, host_callback *callbacks, const char * const simname)
  65 {
  66   Elf_Internal_Phdr * phdrs;
  67   long sizeof_phdrs;
  68   int num_headers;
  69   int i;
  70   int max_rom = 0;
  71
  72   init_cpu ();
  73
  74   /* Note we load by ELF program header not by BFD sections.
  75      This is because BFD sections get their information from
  76      the ELF section structure, which only includes a VMA value
  77      and not an LMA value.  */
  78   sizeof_phdrs = bfd_get_elf_phdr_upper_bound (prog);
  79   if (sizeof_phdrs == 0)
  80     {
  81       fprintf (stderr, "%s: Failed to get size of program headers\n", simname);
  82       return;
  83     }
  84   phdrs = xmalloc (sizeof_phdrs);
  85
  86   num_headers = bfd_get_elf_phdrs (prog, phdrs);
  87   if (num_headers < 1)
  88     {
  89       fprintf (stderr, "%s: Failed to read program headers\n", simname);
  90       return;
  91     }
  92
  93   for (i = 0; i < num_headers; i++)
  94     {
  95       Elf_Internal_Phdr * p = phdrs + i;
  96       char *buf;
  97       bfd_vma size;
  98       bfd_vma base;
  99       file_ptr offset;
 100
 101       size = p->p_filesz;
 102       if (size <= 0)
 103         continue;
 104
 105       base = p->p_paddr;
 106       if (verbose > 1)
 107         fprintf (stderr, "[load segment: lma=%08x vma=%08x size=%08x]\n",
 108                  (int) base, (int) p->p_vaddr, (int) size);
 109       if (callbacks)
 110         xprintf (callbacks,
 111                  "Loading section %s, size %#lx lma %08lx vma %08lx\n",
 112                  find_section_name_by_offset (prog, p->p_offset),
 113                  size, base, p->p_vaddr);
 114
 115       buf = xmalloc (size);
 116
 117       offset = p->p_offset;
 118       if (prog->iovec->bseek (prog, offset, SEEK_SET) != 0)
 119         {
 120           fprintf (stderr, "%s, Failed to seek to offset %lx\n", simname, (long) offset);
 121           continue;
 122         }
 123
 124       if (prog->iovec->bread (prog, buf, size) != size)
 125         {
 126           fprintf (stderr, "%s: Failed to read %lx bytes\n", simname, size);
 127           continue;
 128         }
 129
 130       if (base > 0xeffff || base + size > 0xeffff)
 131         {
 132           fprintf (stderr, "%s, Can't load image to RAM/SFR space: 0x%lx - 0x%lx\n",
 133                    simname, base, base+size);
 134           continue;
 135         }
 136       if (max_rom < base + size)
 137         max_rom = base + size;
 138
 139       mem_put_blk (base, buf, size);
 140       free (buf);
 141     }
 142
 143   free (phdrs);
 144
 145   mem_rom_size (max_rom);
 146
 147   pc = prog->start_address;
 148
 149   if (strcmp (bfd_get_target (prog), "srec") == 0
 150       || pc == 0)
 151     {
 152       pc = mem_get_hi (0);
 153     }
 154
 155   if (verbose > 1)
 156     fprintf (stderr, "[start pc=%08x]\n", (unsigned int) pc);
 157 }