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 }; 365