binutils/od-elf32_avr.c

   1 /* od-avrelf.c -- dump information about an AVR elf object file.
   2    Copyright (C) 2011-2022 Free Software Foundation, Inc.
   3    Written by Senthil Kumar Selvaraj, Atmel.
   4
   5    This file is part of GNU Binutils.
   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 3, 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
  18    along with this program; if not, write to the Free Software
  19    Foundation, 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include <stddef.h>
  24 #include <time.h>
  25 #include <stdint.h>
  26 #include "safe-ctype.h"
  27 #include "bfd.h"
  28 #include "objdump.h"
  29 #include "bucomm.h"
  30 #include "bfdlink.h"
  31 #include "bfd.h"
  32 #include "elf/external.h"
  33 #include "elf/internal.h"
  34 #include "elf32-avr.h"
  35
  36 /* Index of the options in the options[] array.  */
  37 #define OPT_MEMUSAGE 0
  38 #define OPT_AVRPROP 1
  39
  40 /* List of actions.  */
  41 static struct objdump_private_option options[] =
  42   {
  43     { "mem-usage", 0 },
  44     { "avr-prop",  0},
  45     { NULL, 0 }
  46   };
  47
  48 /* Display help.  */
  49
  50 static void
  51 elf32_avr_help (FILE *stream)
  52 {
  53   fprintf (stream, _("\
  54 For AVR ELF files:\n\
  55   mem-usage   Display memory usage\n\
  56   avr-prop    Display contents of .avr.prop section\n\
  57 "));
  58 }
  59
  60 typedef struct tagDeviceInfo
  61 {
  62     uint32_t flash_start;
  63     uint32_t flash_size;
  64     uint32_t ram_start;
  65     uint32_t ram_size;
  66     uint32_t eeprom_start;
  67     uint32_t eeprom_size;
  68     char * name;
  69 } deviceinfo;
  70
  71
  72 /* Return TRUE if ABFD is handled.  */
  73
  74 static int
  75 elf32_avr_filter (bfd *abfd)
  76 {
  77   return bfd_get_flavour (abfd) == bfd_target_elf_flavour;
  78 }
  79
  80 static char *
  81 elf32_avr_get_note_section_contents (bfd *abfd, bfd_size_type *size)
  82 {
  83   asection *section;
  84   bfd_byte *contents;
  85
  86   section = bfd_get_section_by_name (abfd, ".note.gnu.avr.deviceinfo");
  87   if (section == NULL)
  88     return NULL;
  89
  90   if (!bfd_malloc_and_get_section (abfd, section, &contents))
  91     {
  92       free (contents);
  93       contents = NULL;
  94     }
  95
  96   *size = bfd_section_size (section);
  97   return (char *) contents;
  98 }
  99
 100 static char *
 101 elf32_avr_get_note_desc (bfd *abfd, char *contents, bfd_size_type size,
 102                          bfd_size_type *descsz)
 103 {
 104   Elf_External_Note *xnp = (Elf_External_Note *) contents;
 105   Elf_Internal_Note in;
 106
 107   if (offsetof (Elf_External_Note, name) > size)
 108     return NULL;
 109
 110   in.type = bfd_get_32 (abfd, xnp->type);
 111   in.namesz = bfd_get_32 (abfd, xnp->namesz);
 112   in.namedata = xnp->name;
 113   if (in.namesz > contents - in.namedata + size)
 114     return NULL;
 115
 116   if (in.namesz != 4 || strcmp (in.namedata, "AVR") != 0)
 117     return NULL;
 118
 119   in.descsz = bfd_get_32 (abfd, xnp->descsz);
 120   in.descdata = in.namedata + align_power (in.namesz, 2);
 121   if (in.descsz < 6 * sizeof (uint32_t)
 122       || in.descdata >= contents + size
 123       || in.descsz > contents - in.descdata + size)
 124     return NULL;
 125
 126   /* If the note has a string table, ensure it is 0 terminated.  */
 127   if (in.descsz > 8 * sizeof (uint32_t))
 128     in.descdata[in.descsz - 1] = 0;
 129
 130   *descsz = in.descsz;
 131   return in.descdata;
 132 }
 133
 134 static void
 135 elf32_avr_get_device_info (bfd *abfd, char *description,
 136                            bfd_size_type desc_size, deviceinfo *device)
 137 {
 138   if (description == NULL)
 139     return;
 140
 141   const bfd_size_type memory_sizes = 6;
 142
 143   memcpy (device, description, memory_sizes * sizeof (uint32_t));
 144   desc_size -= memory_sizes * sizeof (uint32_t);
 145   if (desc_size < 8)
 146     return;
 147
 148   uint32_t *stroffset_table = (uint32_t *) description + memory_sizes;
 149   bfd_size_type stroffset_table_size = bfd_get_32 (abfd, stroffset_table);
 150
 151   /* If the only content is the size itself, there's nothing in the table */
 152   if (stroffset_table_size < 8)
 153     return;
 154   if (desc_size <= stroffset_table_size)
 155     return;
 156   desc_size -= stroffset_table_size;
 157
 158   /* First entry is the device name index. */
 159   uint32_t device_name_index = bfd_get_32 (abfd, stroffset_table + 1);
 160   if (device_name_index >= desc_size)
 161     return;
 162
 163   char *str_table = (char *) stroffset_table + stroffset_table_size;
 164   device->name = str_table + device_name_index;
 165 }
 166
 167 static void
 168 elf32_avr_get_memory_usage (bfd *abfd,
 169                             bfd_size_type *text_usage,
 170                             bfd_size_type *data_usage,
 171                             bfd_size_type *eeprom_usage)
 172 {
 173
 174   bfd_size_type avr_datasize = 0;
 175   bfd_size_type avr_textsize = 0;
 176   bfd_size_type avr_bsssize = 0;
 177   bfd_size_type bootloadersize = 0;
 178   bfd_size_type noinitsize = 0;
 179   bfd_size_type eepromsize = 0;
 180   bfd_size_type res;
 181   asection *section;
 182
 183   if ((section = bfd_get_section_by_name (abfd, ".data")) != NULL)
 184     avr_datasize = bfd_section_size (section);
 185   if ((section = bfd_get_section_by_name (abfd, ".text")) != NULL)
 186     avr_textsize = bfd_section_size (section);
 187   if ((section = bfd_get_section_by_name (abfd, ".bss")) != NULL)
 188     avr_bsssize = bfd_section_size (section);
 189   if ((section = bfd_get_section_by_name (abfd, ".bootloader")) != NULL)
 190     bootloadersize = bfd_section_size (section);
 191   if ((section = bfd_get_section_by_name (abfd, ".noinit")) != NULL)
 192     noinitsize = bfd_section_size (section);
 193   if ((section = bfd_get_section_by_name (abfd, ".eeprom")) != NULL)
 194     eepromsize = bfd_section_size (section);
 195
 196   /* PR 27285: Check for overflow.  */
 197   res = avr_textsize + avr_datasize;
 198   if (res < avr_textsize || res < avr_datasize)
 199     {
 200       fprintf (stderr, _("Warning: textsize (%#lx) + datasize (%#lx) overflows size type\n"),
 201                (long) avr_textsize, (long) avr_datasize);
 202       res = (bfd_size_type) -1;
 203     }
 204   else
 205     {
 206       bfd_size_type res2;
 207       res2 = res + bootloadersize;
 208       if (res2 < bootloadersize || res2 < res)
 209         {
 210           fprintf (stderr, _("Warning: textsize (%#lx) + datasize (%#lx) + bootloadersize (%#lx) overflows size type\n"),
 211                    (long) avr_textsize, (long) avr_datasize, (long) bootloadersize);
 212           res2 = (bfd_size_type) -1;
 213         }
 214       res = res2;
 215     }
 216   *text_usage = res;
 217
 218   res = avr_datasize + avr_bsssize;
 219   if (res < avr_datasize || res < avr_bsssize)
 220     {
 221       fprintf (stderr, _("Warning: datatsize (%#lx) + bssssize (%#lx) overflows size type\n"),
 222                (long) avr_datasize, (long) avr_bsssize);
 223       res = (bfd_size_type) -1;
 224     }
 225   else
 226     {
 227       bfd_size_type res2;
 228
 229       res2 = res + noinitsize;
 230       if (res2 < res || res2 < noinitsize)
 231         {
 232           fprintf (stderr, _("Warning: datasize (%#lx) + bsssize (%#lx) + noinitsize (%#lx) overflows size type\n"),
 233                    (long) avr_datasize, (long) avr_bsssize, (long) noinitsize);
 234           res2 = (bfd_size_type) -1;
 235         }
 236       res = res2;
 237     }
 238   *data_usage = res;
 239
 240   *eeprom_usage = eepromsize;
 241 }
 242
 243 static void
 244 elf32_avr_dump_mem_usage (bfd *abfd)
 245 {
 246   char *description = NULL;
 247   bfd_size_type sec_size, desc_size;
 248
 249   deviceinfo device = { 0, 0, 0, 0, 0, 0, NULL };
 250   device.name = "Unknown";
 251
 252   bfd_size_type data_usage = 0;
 253   bfd_size_type text_usage = 0;
 254   bfd_size_type eeprom_usage = 0;
 255
 256   char *contents = elf32_avr_get_note_section_contents (abfd, &sec_size);
 257
 258   if (contents != NULL)
 259     {
 260       description = elf32_avr_get_note_desc (abfd, contents, sec_size,
 261                                              &desc_size);
 262       elf32_avr_get_device_info (abfd, description, desc_size, &device);
 263     }
 264
 265   elf32_avr_get_memory_usage (abfd, &text_usage, &data_usage,
 266                               &eeprom_usage);
 267
 268   printf ("AVR Memory Usage\n"
 269           "----------------\n"
 270           "Device: %s\n\n", device.name);
 271
 272   /* Text size */
 273   printf ("Program:%8lu bytes", text_usage);
 274   if (device.flash_size > 0)
 275     printf (" (%2.1f%% Full)", ((float) text_usage / device.flash_size) * 100);
 276
 277   printf ("\n(.text + .data + .bootloader)\n\n");
 278
 279   /* Data size */
 280   printf ("Data:   %8lu bytes", data_usage);
 281   if (device.ram_size > 0)
 282     printf (" (%2.1f%% Full)", ((float) data_usage / device.ram_size) * 100);
 283
 284   printf ("\n(.data + .bss + .noinit)\n\n");
 285
 286   /* EEPROM size */
 287   if (eeprom_usage > 0)
 288     {
 289       printf ("EEPROM: %8lu bytes", eeprom_usage);
 290       if (device.eeprom_size > 0)
 291         printf (" (%2.1f%% Full)", ((float) eeprom_usage / device.eeprom_size) * 100);
 292
 293       printf ("\n(.eeprom)\n\n");
 294     }
 295
 296   if (contents != NULL)
 297     free (contents);
 298
 299 }
 300
 301 static void
 302 elf32_avr_dump_avr_prop (bfd *abfd)
 303 {
 304   struct avr_property_record_list *r_list;
 305   unsigned int i;
 306
 307   r_list = avr_elf32_load_property_records (abfd);
 308   if (r_list == NULL)
 309     return;
 310
 311   printf ("\nContents of `%s' section:\n\n", r_list->section->name);
 312
 313   printf ("  Version: %d\n", r_list->version);
 314   printf ("  Flags:   %#x\n\n", r_list->flags);
 315
 316   for (i = 0; i < r_list->record_count; ++i)
 317     {
 318       printf ("   %d %s @ %s + %#08lx (%#08lx)\n",
 319               i,
 320               avr_elf32_property_record_name (&r_list->records [i]),
 321               r_list->records [i].section->name,
 322               r_list->records [i].offset,
 323               (bfd_section_vma (r_list->records [i].section)
 324                + r_list->records [i].offset));
 325       switch (r_list->records [i].type)
 326         {
 327         case RECORD_ORG:
 328           /* Nothing else to print.  */
 329           break;
 330         case RECORD_ORG_AND_FILL:
 331           printf ("     Fill: %#08lx\n",
 332                   r_list->records [i].data.org.fill);
 333           break;
 334         case RECORD_ALIGN:
 335           printf ("     Align: %#08lx\n",
 336                   r_list->records [i].data.align.bytes);
 337           break;
 338         case RECORD_ALIGN_AND_FILL:
 339           printf ("     Align: %#08lx, Fill: %#08lx\n",
 340                   r_list->records [i].data.align.bytes,
 341                   r_list->records [i].data.align.fill);
 342           break;
 343         }
 344     }
 345
 346   free (r_list);
 347 }
 348
 349 static void
 350 elf32_avr_dump (bfd *abfd)
 351 {
 352   if (options[OPT_MEMUSAGE].selected)
 353     elf32_avr_dump_mem_usage (abfd);
 354   if (options[OPT_AVRPROP].selected)
 355     elf32_avr_dump_avr_prop (abfd);
 356 }
 357
 358 const struct objdump_private_desc objdump_private_desc_elf32_avr =
 359   {
 360     elf32_avr_help,
 361     elf32_avr_filter,
 362     elf32_avr_dump,
 363     options
 364   };