sim/rl78/load.c

   1 /* load.c --- loading object files into the RL78 simulator.
   2
   3    Copyright (C) 2005-2024 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 /* This must come before any other includes.  */
  23 #include "defs.h"
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "libiberty.h"
  30 #include "bfd.h"
  31 #include "bfd/elf-bfd.h"
  32 #include "elf/rl78.h"
  33 #include "cpu.h"
  34 #include "mem.h"
  35 #include "load.h"
  36 #include "elf/internal.h"
  37 #include "elf/common.h"
  38
  39 /* Helper function for invoking a GDB-specified printf.  */
  40 static void
  41 xprintf (host_callback *callback, const char *fmt, ...)
  42 {
  43   va_list ap;
  44
  45   va_start (ap, fmt);
  46
  47   (*callback->vprintf_filtered) (callback, fmt, ap);
  48
  49   va_end (ap);
  50 }
  51
  52 /* Given a file offset, look up the section name.  */
  53 static const char *
  54 find_section_name_by_offset (bfd *abfd, file_ptr filepos)
  55 {
  56   asection *s;
  57
  58   for (s = abfd->sections; s; s = s->next)
  59     if (s->filepos == filepos)
  60       return bfd_section_name (s);
  61
  62   return "(unknown)";
  63 }
  64
  65 void
  66 rl78_load (bfd *prog, host_callback *callbacks, const char * const simname)
  67 {
  68   Elf_Internal_Phdr * phdrs;
  69   long sizeof_phdrs;
  70   int num_headers;
  71   int i;
  72   int max_rom = 0;
  73
  74   init_cpu ();
  75
  76   /* Note we load by ELF program header not by BFD sections.
  77      This is because BFD sections get their information from
  78      the ELF section structure, which only includes a VMA value
  79      and not an LMA value.  */
  80   sizeof_phdrs = bfd_get_elf_phdr_upper_bound (prog);
  81   if (sizeof_phdrs == 0)
  82     {
  83       fprintf (stderr, "%s: Failed to get size of program headers\n", simname);
  84       return;
  85     }
  86   phdrs = xmalloc (sizeof_phdrs);
  87
  88   num_headers = bfd_get_elf_phdrs (prog, phdrs);
  89   if (num_headers < 1)
  90     {
  91       fprintf (stderr, "%s: Failed to read program headers\n", simname);
  92       return;
  93     }
  94
  95   switch (elf_elfheader (prog)->e_flags & E_FLAG_RL78_CPU_MASK)
  96     {
  97     case E_FLAG_RL78_G10:
  98       rl78_g10_mode = 1;
  99       g13_multiply = 0;
 100       g14_multiply = 0;
 101       mem_set_mirror (0, 0xf8000, 4096);
 102       break;
 103     case E_FLAG_RL78_G13:
 104       rl78_g10_mode = 0;
 105       g13_multiply = 1;
 106       g14_multiply = 0;
 107       break;
 108     case E_FLAG_RL78_G14:
 109       rl78_g10_mode = 0;
 110       g13_multiply = 0;
 111       g14_multiply = 1;
 112       break;
 113     default:
 114       /* Keep whatever was manually specified.  */
 115       break;
 116     }
 117
 118   for (i = 0; i < num_headers; i++)
 119     {
 120       Elf_Internal_Phdr * p = phdrs + i;
 121       char *buf;
 122       bfd_vma size;
 123       bfd_vma base;
 124       file_ptr offset;
 125
 126       size = p->p_filesz;
 127       if (size <= 0)
 128         continue;
 129
 130       base = p->p_paddr;
 131       if (verbose > 1)
 132         fprintf (stderr,
 133                  "[load segment: lma=%08" PRIx64 " vma=%08" PRIx64 " "
 134                  "size=%08" PRIx64 "]\n",
 135                  (uint64_t) base, (uint64_t) p->p_vaddr, (uint64_t) size);
 136       if (callbacks)
 137         xprintf (callbacks,
 138                  "Loading section %s, size %#" PRIx64 " "
 139                  "lma %08" PRIx64 " vma %08" PRIx64 "\n",
 140                  find_section_name_by_offset (prog, p->p_offset),
 141                  (uint64_t) size, (uint64_t) base, (uint64_t) p->p_vaddr);
 142
 143       buf = xmalloc (size);
 144
 145       offset = p->p_offset;
 146       if (bfd_seek (prog, offset, SEEK_SET) != 0)
 147         {
 148           fprintf (stderr, "%s, Failed to seek to offset %lx\n", simname, (long) offset);
 149           continue;
 150         }
 151
 152       if (bfd_read (buf, size, prog) != size)
 153         {
 154           fprintf (stderr, "%s: Failed to read %" PRIx64 " bytes\n",
 155                    simname, (uint64_t) size);
 156           continue;
 157         }
 158
 159       if (base > 0xeffff || base + size > 0xeffff)
 160         {
 161           fprintf (stderr,
 162                    "%s, Can't load image to RAM/SFR space: 0x%" PRIx64 " "
 163                    "- 0x%" PRIx64 "\n",
 164                    simname, (uint64_t) base, (uint64_t) (base + size));
 165           continue;
 166         }
 167       if (max_rom < base + size)
 168         max_rom = base + size;
 169
 170       mem_put_blk (base, buf, size);
 171       free (buf);
 172     }
 173
 174   free (phdrs);
 175
 176   mem_rom_size (max_rom);
 177
 178   pc = prog->start_address;
 179
 180   if (strcmp (bfd_get_target (prog), "srec") == 0
 181       || pc == 0)
 182     {
 183       pc = mem_get_hi (0);
 184     }
 185
 186   if (verbose > 1)
 187     fprintf (stderr, "[start pc=%08x]\n", (unsigned int) pc);
 188 }