git.sur5r.net Git - openocd/blob - src/target/image.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   Copyright (C) 2009 by Franck Hereson                                  *
  12  *   franck.hereson@secad.fr                                               *
  13  *                                                                         *
  14  *   This program is free software; you can redistribute it and/or modify  *
  15  *   it under the terms of the GNU General Public License as published by  *
  16  *   the Free Software Foundation; either version 2 of the License, or     *
  17  *   (at your option) any later version.                                   *
  18  *                                                                         *
  19  *   This program is distributed in the hope that it will be useful,       *
  20  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  21  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  22  *   GNU General Public License for more details.                          *
  23  *                                                                         *
  24  *   You should have received a copy of the GNU General Public License     *
  25  *   along with this program; if not, write to the                         *
  26  *   Free Software Foundation, Inc.,                                       *
  27  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  28  ***************************************************************************/
  29 #ifdef HAVE_CONFIG_H
  30 #include "config.h"
  31 #endif
  32
  33 #include "image.h"
  34 #include "target.h"
  35 #include <helper/log.h>
  36
  37
  38 /* convert ELF header field to host endianness */
  39 #define field16(elf,field)\
  40         ((elf->endianness == ELFDATA2LSB)? \
  41                 le_to_h_u16((uint8_t*)&field):be_to_h_u16((uint8_t*)&field))
  42
  43 #define field32(elf,field)\
  44         ((elf->endianness == ELFDATA2LSB)? \
  45                 le_to_h_u32((uint8_t*)&field):be_to_h_u32((uint8_t*)&field))
  46
  47 static int autodetect_image_type(struct image *image, const char *url)
  48 {
  49         int retval;
  50         struct fileio fileio;
  51         size_t read_bytes;
  52         uint8_t buffer[9];
  53
  54         /* read the first 4 bytes of image */
  55         if ((retval = fileio_open(&fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
  56         {
  57                 return retval;
  58         }
  59         retval = fileio_read(&fileio, 9, buffer, &read_bytes);
  60
  61         if (retval == ERROR_OK)
  62         {
  63                 if (read_bytes != 9)
  64                 {
  65                         retval = ERROR_FILEIO_OPERATION_FAILED;
  66                 }
  67         }
  68         fileio_close(&fileio);
  69
  70         if (retval != ERROR_OK)
  71                 return retval;
  72
  73         /* check header against known signatures */
  74         if (strncmp((char*)buffer,ELFMAG,SELFMAG) == 0)
  75         {
  76                 LOG_DEBUG("ELF image detected.");
  77                 image->type = IMAGE_ELF;
  78         }
  79         else if ((buffer[0]==':') /* record start byte */
  80                 &&(isxdigit(buffer[1]))
  81                 &&(isxdigit(buffer[2]))
  82                 &&(isxdigit(buffer[3]))
  83                 &&(isxdigit(buffer[4]))
  84                 &&(isxdigit(buffer[5]))
  85                 &&(isxdigit(buffer[6]))
  86                 &&(buffer[7]=='0') /* record type : 00 -> 05 */
  87                 &&(buffer[8]>='0') && (buffer[8]<'6'))
  88         {
  89                 LOG_DEBUG("IHEX image detected.");
  90                 image->type = IMAGE_IHEX;
  91         }
  92         else if ((buffer[0] == 'S') /* record start byte */
  93                 &&(isxdigit(buffer[1]))
  94                 &&(isxdigit(buffer[2]))
  95                 &&(isxdigit(buffer[3]))
  96                 &&(buffer[1] >= '0') && (buffer[1] < '9'))
  97         {
  98                 LOG_DEBUG("S19 image detected.");
  99                 image->type = IMAGE_SRECORD;
 100         }
 101         else
 102         {
 103                 image->type = IMAGE_BINARY;
 104         }
 105
 106         return ERROR_OK;
 107 }
 108
 109 static int identify_image_type(struct image *image, const char *type_string, const char *url)
 110 {
 111         if (type_string)
 112         {
 113                 if (!strcmp(type_string, "bin"))
 114                 {
 115                         image->type = IMAGE_BINARY;
 116                 }
 117                 else if (!strcmp(type_string, "ihex"))
 118                 {
 119                         image->type = IMAGE_IHEX;
 120                 }
 121                 else if (!strcmp(type_string, "elf"))
 122                 {
 123                         image->type = IMAGE_ELF;
 124                 }
 125                 else if (!strcmp(type_string, "mem"))
 126                 {
 127                         image->type = IMAGE_MEMORY;
 128                 }
 129                 else if (!strcmp(type_string, "s19"))
 130                 {
 131                         image->type = IMAGE_SRECORD;
 132                 }
 133                 else if (!strcmp(type_string, "build"))
 134                 {
 135                         image->type = IMAGE_BUILDER;
 136                 }
 137                 else
 138                 {
 139                         return ERROR_IMAGE_TYPE_UNKNOWN;
 140                 }
 141         }
 142         else
 143         {
 144                 return autodetect_image_type(image, url);
 145         }
 146
 147         return ERROR_OK;
 148 }
 149
 150 static int image_ihex_buffer_complete_inner(struct image *image, char *lpszLine, struct imagesection *section)
 151 {
 152         struct image_ihex *ihex = image->type_private;
 153         struct fileio *fileio = &ihex->fileio;
 154         uint32_t full_address = 0x0;
 155         uint32_t cooked_bytes;
 156         int i;
 157
 158         /* we can't determine the number of sections that we'll have to create ahead of time,
 159          * so we locally hold them until parsing is finished */
 160
 161         int filesize;
 162         int retval;
 163         retval = fileio_size(fileio, &filesize);
 164         if (retval != ERROR_OK)
 165                 return retval;
 166
 167         ihex->buffer = malloc(filesize >> 1);
 168         cooked_bytes = 0x0;
 169         image->num_sections = 0;
 170         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 171         section[image->num_sections].base_address = 0x0;
 172         section[image->num_sections].size = 0x0;
 173         section[image->num_sections].flags = 0;
 174
 175         while (fileio_fgets(fileio, 1023, lpszLine) == ERROR_OK)
 176         {
 177                 uint32_t count;
 178                 uint32_t address;
 179                 uint32_t record_type;
 180                 uint32_t checksum;
 181                 uint8_t cal_checksum = 0;
 182                 size_t bytes_read = 0;
 183
 184                 if (sscanf(&lpszLine[bytes_read], ":%2" SCNx32 "%4" SCNx32 "%2" SCNx32 , &count, &address, &record_type) != 3)
 185                 {
 186                         return ERROR_IMAGE_FORMAT_ERROR;
 187                 }
 188                 bytes_read += 9;
 189
 190                 cal_checksum += (uint8_t)count;
 191                 cal_checksum += (uint8_t)(address >> 8);
 192                 cal_checksum += (uint8_t)address;
 193                 cal_checksum += (uint8_t)record_type;
 194
 195                 if (record_type == 0) /* Data Record */
 196                 {
 197                         if ((full_address & 0xffff) != address)
 198                         {
 199                                 /* we encountered a nonconsecutive location, create a new section,
 200                                  * unless the current section has zero size, in which case this specifies
 201                                  * the current section's base address
 202                                  */
 203                                 if (section[image->num_sections].size != 0)
 204                                 {
 205                                         image->num_sections++;
 206                                         if (image->num_sections >= IMAGE_MAX_SECTIONS)
 207                                         {
 208                                                 /* too many sections */
 209                                                 LOG_ERROR("Too many sections found in IHEX file");
 210                                                 return ERROR_IMAGE_FORMAT_ERROR;
 211                                         }
 212                                         section[image->num_sections].size = 0x0;
 213                                         section[image->num_sections].flags = 0;
 214                                         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 215                                 }
 216                                 section[image->num_sections].base_address =
 217                                         (full_address & 0xffff0000) | address;
 218                                 full_address = (full_address & 0xffff0000) | address;
 219                         }
 220
 221                         while (count-- > 0)
 222                         {
 223                                 unsigned value;
 224                                 sscanf(&lpszLine[bytes_read], "%2x", &value);
 225                                 ihex->buffer[cooked_bytes] = (uint8_t)value;
 226                                 cal_checksum += (uint8_t)ihex->buffer[cooked_bytes];
 227                                 bytes_read += 2;
 228                                 cooked_bytes += 1;
 229                                 section[image->num_sections].size += 1;
 230                                 full_address++;
 231                         }
 232                 }
 233                 else if (record_type == 1) /* End of File Record */
 234                 {
 235                         /* finish the current section */
 236                         image->num_sections++;
 237
 238                         /* copy section information */
 239                         image->sections = malloc(sizeof(struct imagesection) * image->num_sections);
 240                         for (i = 0; i < image->num_sections; i++)
 241                         {
 242                                 image->sections[i].private = section[i].private;
 243                                 image->sections[i].base_address = section[i].base_address;
 244                                 image->sections[i].size = section[i].size;
 245                                 image->sections[i].flags = section[i].flags;
 246                         }
 247
 248                         return ERROR_OK;
 249                 }
 250                 else if (record_type == 2) /* Linear Address Record */
 251                 {
 252                         uint16_t upper_address;
 253
 254                         sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
 255                         cal_checksum += (uint8_t)(upper_address >> 8);
 256                         cal_checksum += (uint8_t)upper_address;
 257                         bytes_read += 4;
 258
 259                         if ((full_address >> 4) != upper_address)
 260                         {
 261                                 /* we encountered a nonconsecutive location, create a new section,
 262                                  * unless the current section has zero size, in which case this specifies
 263                                  * the current section's base address
 264                                  */
 265                                 if (section[image->num_sections].size != 0)
 266                                 {
 267                                         image->num_sections++;
 268                                         if (image->num_sections >= IMAGE_MAX_SECTIONS)
 269                                         {
 270                                                 /* too many sections */
 271                                                 LOG_ERROR("Too many sections found in IHEX file");
 272                                                 return ERROR_IMAGE_FORMAT_ERROR;
 273                                         }
 274                                         section[image->num_sections].size = 0x0;
 275                                         section[image->num_sections].flags = 0;
 276                                         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 277                                 }
 278                                 section[image->num_sections].base_address =
 279                                         (full_address & 0xffff) | (upper_address << 4);
 280                                 full_address = (full_address & 0xffff) | (upper_address << 4);
 281                         }
 282                 }
 283                 else if (record_type == 3) /* Start Segment Address Record */
 284                 {
 285                         uint32_t dummy;
 286
 287                         /* "Start Segment Address Record" will not be supported */
 288                         /* but we must consume it, and do not create an error.  */
 289                         while (count-- > 0)
 290                         {
 291                                 sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &dummy);
 292                                 cal_checksum += (uint8_t)dummy;
 293                                 bytes_read += 2;
 294                         }
 295                 }
 296                 else if (record_type == 4) /* Extended Linear Address Record */
 297                 {
 298                         uint16_t upper_address;
 299
 300                         sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
 301                         cal_checksum += (uint8_t)(upper_address >> 8);
 302                         cal_checksum += (uint8_t)upper_address;
 303                         bytes_read += 4;
 304
 305                         if ((full_address >> 16) != upper_address)
 306                         {
 307                                 /* we encountered a nonconsecutive location, create a new section,
 308                                  * unless the current section has zero size, in which case this specifies
 309                                  * the current section's base address
 310                                  */
 311                                 if (section[image->num_sections].size != 0)
 312                                 {
 313                                         image->num_sections++;
 314                                         if (image->num_sections >= IMAGE_MAX_SECTIONS)
 315                                         {
 316                                                 /* too many sections */
 317                                                 LOG_ERROR("Too many sections found in IHEX file");
 318                                                 return ERROR_IMAGE_FORMAT_ERROR;
 319                                         }
 320                                         section[image->num_sections].size = 0x0;
 321                                         section[image->num_sections].flags = 0;
 322                                         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 323                                 }
 324                                 section[image->num_sections].base_address =
 325                                         (full_address & 0xffff) | (upper_address << 16);
 326                                 full_address = (full_address & 0xffff) | (upper_address << 16);
 327                         }
 328                 }
 329                 else if (record_type == 5) /* Start Linear Address Record */
 330                 {
 331                         uint32_t start_address;
 332
 333                         sscanf(&lpszLine[bytes_read], "%8" SCNx32, &start_address);
 334                         cal_checksum += (uint8_t)(start_address >> 24);
 335                         cal_checksum += (uint8_t)(start_address >> 16);
 336                         cal_checksum += (uint8_t)(start_address >> 8);
 337                         cal_checksum += (uint8_t)start_address;
 338                         bytes_read += 8;
 339
 340                         image->start_address_set = 1;
 341                         image->start_address = be_to_h_u32((uint8_t*)&start_address);
 342                 }
 343                 else
 344                 {
 345                   LOG_ERROR("unhandled IHEX record type: %i", (int)record_type);
 346                         return ERROR_IMAGE_FORMAT_ERROR;
 347                 }
 348
 349                 sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &checksum);
 350                 bytes_read += 2;
 351
 352                 if ((uint8_t)checksum != (uint8_t)(~cal_checksum + 1))
 353                 {
 354                         /* checksum failed */
 355                         LOG_ERROR("incorrect record checksum found in IHEX file");
 356                         return ERROR_IMAGE_CHECKSUM;
 357                 }
 358         }
 359
 360         LOG_ERROR("premature end of IHEX file, no end-of-file record found");
 361         return ERROR_IMAGE_FORMAT_ERROR;
 362 }
 363
 364 /**
 365  * Allocate memory dynamically instead of on the stack. This
 366  * is important w/embedded hosts.
 367  */
 368 static int image_ihex_buffer_complete(struct image *image)
 369 {
 370         char *lpszLine = malloc(1023);
 371         if (lpszLine == NULL)
 372         {
 373                 LOG_ERROR("Out of memory");
 374                 return ERROR_FAIL;
 375         }
 376         struct imagesection *section = malloc(sizeof(struct imagesection) * IMAGE_MAX_SECTIONS);
 377         if (section == NULL)
 378         {
 379                 free(lpszLine);
 380                 LOG_ERROR("Out of memory");
 381                 return ERROR_FAIL;
 382         }
 383         int retval;
 384
 385         retval = image_ihex_buffer_complete_inner(image, lpszLine, section);
 386
 387         free(section);
 388         free(lpszLine);
 389
 390         return retval;
 391 }
 392
 393 static int image_elf_read_headers(struct image *image)
 394 {
 395         struct image_elf *elf = image->type_private;
 396         size_t read_bytes;
 397         uint32_t i,j;
 398         int retval;
 399
 400         elf->header = malloc(sizeof(Elf32_Ehdr));
 401
 402         if (elf->header == NULL)
 403         {
 404                 LOG_ERROR("insufficient memory to perform operation ");
 405                 return ERROR_FILEIO_OPERATION_FAILED;
 406         }
 407
 408         if ((retval = fileio_read(&elf->fileio, sizeof(Elf32_Ehdr), (uint8_t*)elf->header, &read_bytes)) != ERROR_OK)
 409         {
 410                 LOG_ERROR("cannot read ELF file header, read failed");
 411                 return ERROR_FILEIO_OPERATION_FAILED;
 412         }
 413         if (read_bytes != sizeof(Elf32_Ehdr))
 414         {
 415                 LOG_ERROR("cannot read ELF file header, only partially read");
 416                 return ERROR_FILEIO_OPERATION_FAILED;
 417         }
 418
 419         if (strncmp((char*)elf->header->e_ident,ELFMAG,SELFMAG) != 0)
 420         {
 421                 LOG_ERROR("invalid ELF file, bad magic number");
 422                 return ERROR_IMAGE_FORMAT_ERROR;
 423         }
 424         if (elf->header->e_ident[EI_CLASS]!=ELFCLASS32)
 425         {
 426                 LOG_ERROR("invalid ELF file, only 32bits files are supported");
 427                 return ERROR_IMAGE_FORMAT_ERROR;
 428         }
 429
 430         elf->endianness = elf->header->e_ident[EI_DATA];
 431         if ((elf->endianness != ELFDATA2LSB)
 432                  &&(elf->endianness != ELFDATA2MSB))
 433         {
 434                 LOG_ERROR("invalid ELF file, unknown endianness setting");
 435                 return ERROR_IMAGE_FORMAT_ERROR;
 436         }
 437
 438         elf->segment_count = field16(elf,elf->header->e_phnum);
 439         if (elf->segment_count == 0)
 440         {
 441                 LOG_ERROR("invalid ELF file, no program headers");
 442                 return ERROR_IMAGE_FORMAT_ERROR;
 443         }
 444
 445         if ((retval = fileio_seek(&elf->fileio, field32(elf,elf->header->e_phoff))) != ERROR_OK)
 446         {
 447                 LOG_ERROR("cannot seek to ELF program header table, read failed");
 448                 return retval;
 449         }
 450
 451         elf->segments = malloc(elf->segment_count*sizeof(Elf32_Phdr));
 452         if (elf->segments == NULL)
 453         {
 454                 LOG_ERROR("insufficient memory to perform operation ");
 455                 return ERROR_FILEIO_OPERATION_FAILED;
 456         }
 457
 458         if ((retval = fileio_read(&elf->fileio, elf->segment_count*sizeof(Elf32_Phdr), (uint8_t*)elf->segments, &read_bytes)) != ERROR_OK)
 459         {
 460                 LOG_ERROR("cannot read ELF segment headers, read failed");
 461                 return retval;
 462         }
 463         if (read_bytes != elf->segment_count*sizeof(Elf32_Phdr))
 464         {
 465                 LOG_ERROR("cannot read ELF segment headers, only partially read");
 466                 return ERROR_FILEIO_OPERATION_FAILED;
 467         }
 468
 469         /* count useful segments (loadable), ignore BSS section */
 470         image->num_sections = 0;
 471         for (i = 0;i < elf->segment_count;i++)
 472                 if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_filesz) != 0))
 473                         image->num_sections++;
 474         /* alloc and fill sections array with loadable segments */
 475         image->sections = malloc(image->num_sections * sizeof(struct imagesection));
 476         for (i = 0,j = 0;i < elf->segment_count;i++)
 477         {
 478                 if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_filesz) != 0))
 479                 {
 480                         image->sections[j].size = field32(elf,elf->segments[i].p_filesz);
 481                         image->sections[j].base_address = field32(elf,elf->segments[i].p_paddr);
 482                         image->sections[j].private = &elf->segments[i];
 483                         image->sections[j].flags = field32(elf,elf->segments[i].p_flags);
 484                         j++;
 485                 }
 486         }
 487
 488         image->start_address_set = 1;
 489         image->start_address = field32(elf,elf->header->e_entry);
 490
 491         return ERROR_OK;
 492 }
 493
 494 static int image_elf_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, size_t *size_read)
 495 {
 496         struct image_elf *elf = image->type_private;
 497         Elf32_Phdr *segment = (Elf32_Phdr *)image->sections[section].private;
 498         size_t read_size,really_read;
 499         int retval;
 500
 501         *size_read = 0;
 502
 503         LOG_DEBUG("load segment %d at 0x%" PRIx32 " (sz = 0x%" PRIx32 ")",section,offset,size);
 504
 505         /* read initialized data in current segment if any */
 506         if (offset < field32(elf,segment->p_filesz))
 507         {
 508                 /* maximal size present in file for the current segment */
 509                 read_size = MIN(size, field32(elf,segment->p_filesz)-offset);
 510                 LOG_DEBUG("read elf: size = 0x%zu at 0x%" PRIx32 "", read_size,
 511                         field32(elf,segment->p_offset) + offset);
 512                 /* read initialized area of the segment */
 513                 if ((retval = fileio_seek(&elf->fileio, field32(elf,segment->p_offset) + offset)) != ERROR_OK)
 514                 {
 515                         LOG_ERROR("cannot find ELF segment content, seek failed");
 516                         return retval;
 517                 }
 518                 if ((retval = fileio_read(&elf->fileio, read_size, buffer, &really_read)) != ERROR_OK)
 519                 {
 520                         LOG_ERROR("cannot read ELF segment content, read failed");
 521                         return retval;
 522                 }
 523                 buffer += read_size;
 524                 size -= read_size;
 525                 offset += read_size;
 526                 *size_read += read_size;
 527                 /* need more data ? */
 528                 if (!size)
 529                         return ERROR_OK;
 530         }
 531
 532         return ERROR_OK;
 533 }
 534
 535 static int image_mot_buffer_complete_inner(struct image *image, char *lpszLine, struct imagesection *section)
 536 {
 537         struct image_mot *mot = image->type_private;
 538         struct fileio *fileio = &mot->fileio;
 539         uint32_t full_address = 0x0;
 540         uint32_t cooked_bytes;
 541         int i;
 542
 543         /* we can't determine the number of sections that we'll have to create ahead of time,
 544          * so we locally hold them until parsing is finished */
 545
 546         int retval;
 547         int filesize;
 548         retval = fileio_size(fileio, &filesize);
 549         if (retval != ERROR_OK)
 550                 return retval;
 551
 552         mot->buffer = malloc(filesize >> 1);
 553         cooked_bytes = 0x0;
 554         image->num_sections = 0;
 555         section[image->num_sections].private = &mot->buffer[cooked_bytes];
 556         section[image->num_sections].base_address = 0x0;
 557         section[image->num_sections].size = 0x0;
 558         section[image->num_sections].flags = 0;
 559
 560         while (fileio_fgets(fileio, 1023, lpszLine) == ERROR_OK)
 561         {
 562                 uint32_t count;
 563                 uint32_t address;
 564                 uint32_t record_type;
 565                 uint32_t checksum;
 566                 uint8_t cal_checksum = 0;
 567                 uint32_t bytes_read = 0;
 568
 569                 /* get record type and record length */
 570                 if (sscanf(&lpszLine[bytes_read], "S%1" SCNx32 "%2" SCNx32 , &record_type, &count) != 2)
 571                 {
 572                         return ERROR_IMAGE_FORMAT_ERROR;
 573                 }
 574
 575                 bytes_read += 4;
 576                 cal_checksum += (uint8_t)count;
 577
 578                 /* skip checksum byte */
 579                 count -=1;
 580
 581                 if (record_type == 0)
 582                 {
 583                         /* S0 - starting record (optional) */
 584                         int iValue;
 585
 586                         while (count-- > 0) {
 587                                 sscanf(&lpszLine[bytes_read], "%2x", &iValue);
 588                                 cal_checksum += (uint8_t)iValue;
 589                                 bytes_read += 2;
 590                         }
 591                 }
 592                 else if (record_type >= 1 && record_type <= 3)
 593                 {
 594                         switch (record_type)
 595                         {
 596                                 case 1:
 597                                         /* S1 - 16 bit address data record */
 598                                         sscanf(&lpszLine[bytes_read], "%4" SCNx32, &address);
 599                                         cal_checksum += (uint8_t)(address >> 8);
 600                                         cal_checksum += (uint8_t)address;
 601                                         bytes_read += 4;
 602                                         count -=2;
 603                                         break;
 604
 605                                 case 2:
 606                                         /* S2 - 24 bit address data record */
 607                                         sscanf(&lpszLine[bytes_read], "%6" SCNx32 , &address);
 608                                         cal_checksum += (uint8_t)(address >> 16);
 609                                         cal_checksum += (uint8_t)(address >> 8);
 610                                         cal_checksum += (uint8_t)address;
 611                                         bytes_read += 6;
 612                                         count -=3;
 613                                         break;
 614
 615                                 case 3:
 616                                         /* S3 - 32 bit address data record */
 617                                         sscanf(&lpszLine[bytes_read], "%8" SCNx32 , &address);
 618                                         cal_checksum += (uint8_t)(address >> 24);
 619                                         cal_checksum += (uint8_t)(address >> 16);
 620                                         cal_checksum += (uint8_t)(address >> 8);
 621                                         cal_checksum += (uint8_t)address;
 622                                         bytes_read += 8;
 623                                         count -=4;
 624                                         break;
 625
 626                         }
 627
 628                         if (full_address != address)
 629                         {
 630                                 /* we encountered a nonconsecutive location, create a new section,
 631                                  * unless the current section has zero size, in which case this specifies
 632                                  * the current section's base address
 633                                  */
 634                                 if (section[image->num_sections].size != 0)
 635                                 {
 636                                         image->num_sections++;
 637                                         section[image->num_sections].size = 0x0;
 638                                         section[image->num_sections].flags = 0;
 639                                         section[image->num_sections].private = &mot->buffer[cooked_bytes];
 640                                 }
 641                                 section[image->num_sections].base_address = address;
 642                                 full_address = address;
 643                         }
 644
 645                         while (count-- > 0)
 646                         {
 647                                 unsigned value;
 648                                 sscanf(&lpszLine[bytes_read], "%2x", &value);
 649                                 mot->buffer[cooked_bytes] = (uint8_t)value;
 650                                 cal_checksum += (uint8_t)mot->buffer[cooked_bytes];
 651                                 bytes_read += 2;
 652                                 cooked_bytes += 1;
 653                                 section[image->num_sections].size += 1;
 654                                 full_address++;
 655                         }
 656                 }
 657                 else if (record_type == 5)
 658                 {
 659                         /* S5 is the data count record, we ignore it */
 660                         uint32_t dummy;
 661
 662                         while (count-- > 0)
 663                         {
 664                                 sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &dummy);
 665                                 cal_checksum += (uint8_t)dummy;
 666                                 bytes_read += 2;
 667                         }
 668                 }
 669                 else if (record_type >= 7 && record_type <= 9)
 670                 {
 671                         /* S7, S8, S9 - ending records for 32, 24 and 16bit */
 672                         image->num_sections++;
 673
 674                         /* copy section information */
 675                         image->sections = malloc(sizeof(struct imagesection) * image->num_sections);
 676                         for (i = 0; i < image->num_sections; i++)
 677                         {
 678                                 image->sections[i].private = section[i].private;
 679                                 image->sections[i].base_address = section[i].base_address;
 680                                 image->sections[i].size = section[i].size;
 681                                 image->sections[i].flags = section[i].flags;
 682                         }
 683
 684                         return ERROR_OK;
 685                 }
 686                 else
 687                 {
 688                   LOG_ERROR("unhandled S19 record type: %i", (int)(record_type));
 689                         return ERROR_IMAGE_FORMAT_ERROR;
 690                 }
 691
 692                 /* account for checksum, will always be 0xFF */
 693                 sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &checksum);
 694                 cal_checksum += (uint8_t)checksum;
 695                 bytes_read += 2;
 696
 697                 if (cal_checksum != 0xFF)
 698                 {
 699                         /* checksum failed */
 700                         LOG_ERROR("incorrect record checksum found in S19 file");
 701                         return ERROR_IMAGE_CHECKSUM;
 702                 }
 703         }
 704
 705         LOG_ERROR("premature end of S19 file, no end-of-file record found");
 706         return ERROR_IMAGE_FORMAT_ERROR;
 707 }
 708
 709 /**
 710  * Allocate memory dynamically instead of on the stack. This
 711  * is important w/embedded hosts.
 712  */
 713 static int image_mot_buffer_complete(struct image *image)
 714 {
 715         char *lpszLine = malloc(1023);
 716         if (lpszLine == NULL)
 717         {
 718                 LOG_ERROR("Out of memory");
 719                 return ERROR_FAIL;
 720         }
 721         struct imagesection *section = malloc(sizeof(struct imagesection) * IMAGE_MAX_SECTIONS);
 722         if (section == NULL)
 723         {
 724                 free(lpszLine);
 725                 LOG_ERROR("Out of memory");
 726                 return ERROR_FAIL;
 727         }
 728         int retval;
 729
 730         retval = image_mot_buffer_complete_inner(image, lpszLine, section);
 731
 732         free(section);
 733         free(lpszLine);
 734
 735         return retval;
 736 }
 737
 738
 739 int image_open(struct image *image, const char *url, const char *type_string)
 740 {
 741         int retval = ERROR_OK;
 742
 743         if ((retval = identify_image_type(image, type_string, url)) != ERROR_OK)
 744         {
 745                 return retval;
 746         }
 747
 748         if (image->type == IMAGE_BINARY)
 749         {
 750                 struct image_binary *image_binary;
 751
 752                 image_binary = image->type_private = malloc(sizeof(struct image_binary));
 753
 754                 if ((retval = fileio_open(&image_binary->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
 755                 {
 756                         return retval;
 757                 }
 758                 int filesize;
 759                 retval = fileio_size(&image_binary->fileio, &filesize);
 760                 if (retval != ERROR_OK)
 761                 {
 762                         fileio_close(&image_binary->fileio);
 763                         return retval;
 764                 }
 765
 766                 image->num_sections = 1;
 767                 image->sections = malloc(sizeof(struct imagesection));
 768                 image->sections[0].base_address = 0x0;
 769                 image->sections[0].size = filesize;
 770                 image->sections[0].flags = 0;
 771         }
 772         else if (image->type == IMAGE_IHEX)
 773         {
 774                 struct image_ihex *image_ihex;
 775
 776                 image_ihex = image->type_private = malloc(sizeof(struct image_ihex));
 777
 778                 if ((retval = fileio_open(&image_ihex->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
 779                 {
 780                         return retval;
 781                 }
 782
 783                 if ((retval = image_ihex_buffer_complete(image)) != ERROR_OK)
 784                 {
 785                         LOG_ERROR("failed buffering IHEX image, check daemon output for additional information");
 786                         fileio_close(&image_ihex->fileio);
 787                         return retval;
 788                 }
 789         }
 790         else if (image->type == IMAGE_ELF)
 791         {
 792                 struct image_elf *image_elf;
 793
 794                 image_elf = image->type_private = malloc(sizeof(struct image_elf));
 795
 796                 if ((retval = fileio_open(&image_elf->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
 797                 {
 798                         return retval;
 799                 }
 800
 801                 if ((retval = image_elf_read_headers(image)) != ERROR_OK)
 802                 {
 803                         fileio_close(&image_elf->fileio);
 804                         return retval;
 805                 }
 806         }
 807         else if (image->type == IMAGE_MEMORY)
 808         {
 809                 struct target *target = get_target(url);
 810
 811                 if (target == NULL)
 812                 {
 813                         LOG_ERROR("target '%s' not defined", url);
 814                         return ERROR_FAIL;
 815                 }
 816
 817                 struct image_memory *image_memory;
 818
 819                 image->num_sections = 1;
 820                 image->sections = malloc(sizeof(struct imagesection));
 821                 image->sections[0].base_address = 0x0;
 822                 image->sections[0].size = 0xffffffff;
 823                 image->sections[0].flags = 0;
 824
 825                 image_memory = image->type_private = malloc(sizeof(struct image_memory));
 826
 827                 image_memory->target = target;
 828                 image_memory->cache = NULL;
 829                 image_memory->cache_address = 0x0;
 830         }
 831         else if (image->type == IMAGE_SRECORD)
 832         {
 833                 struct image_mot *image_mot;
 834
 835                 image_mot = image->type_private = malloc(sizeof(struct image_mot));
 836
 837                 if ((retval = fileio_open(&image_mot->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
 838                 {
 839                         return retval;
 840                 }
 841
 842                 if ((retval = image_mot_buffer_complete(image)) != ERROR_OK)
 843                 {
 844                         LOG_ERROR("failed buffering S19 image, check daemon output for additional information");
 845                         fileio_close(&image_mot->fileio);
 846                         return retval;
 847                 }
 848         }
 849         else if (image->type == IMAGE_BUILDER)
 850         {
 851                 image->num_sections = 0;
 852                 image->sections = NULL;
 853                 image->type_private = NULL;
 854         }
 855
 856         if (image->base_address_set)
 857         {
 858                 /* relocate */
 859                 int section;
 860                 for (section = 0; section < image->num_sections; section++)
 861                 {
 862                         image->sections[section].base_address += image->base_address;
 863                 }
 864                 /* we're done relocating. The two statements below are mainly
 865                  * for documenation purposes: stop anyone from empirically
 866                  * thinking they should use these values henceforth. */
 867                 image->base_address = 0;
 868                 image->base_address_set = 0;
 869         }
 870
 871         return retval;
 872 };
 873
 874 int image_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, size_t *size_read)
 875 {
 876         int retval;
 877
 878         /* don't read past the end of a section */
 879         if (offset + size > image->sections[section].size)
 880         {
 881                 LOG_DEBUG("read past end of section: 0x%8.8" PRIx32 " + 0x%8.8" PRIx32 " > 0x%8.8" PRIx32 "",
 882                                 offset, size, image->sections[section].size);
 883                 return ERROR_INVALID_ARGUMENTS;
 884         }
 885
 886         if (image->type == IMAGE_BINARY)
 887         {
 888                 struct image_binary *image_binary = image->type_private;
 889
 890                 /* only one section in a plain binary */
 891                 if (section != 0)
 892                         return ERROR_INVALID_ARGUMENTS;
 893
 894                 /* seek to offset */
 895                 if ((retval = fileio_seek(&image_binary->fileio, offset)) != ERROR_OK)
 896                 {
 897                         return retval;
 898                 }
 899
 900                 /* return requested bytes */
 901                 if ((retval = fileio_read(&image_binary->fileio, size, buffer, size_read)) != ERROR_OK)
 902                 {
 903                         return retval;
 904                 }
 905         }
 906         else if (image->type == IMAGE_IHEX)
 907         {
 908                 memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
 909                 *size_read = size;
 910
 911                 return ERROR_OK;
 912         }
 913         else if (image->type == IMAGE_ELF)
 914         {
 915                 return image_elf_read_section(image, section, offset, size, buffer, size_read);
 916         }
 917         else if (image->type == IMAGE_MEMORY)
 918         {
 919                 struct image_memory *image_memory = image->type_private;
 920                 uint32_t address = image->sections[section].base_address + offset;
 921
 922                 *size_read = 0;
 923
 924                 while ((size - *size_read) > 0)
 925                 {
 926                         uint32_t size_in_cache;
 927
 928                         if (!image_memory->cache
 929                                 || (address < image_memory->cache_address)
 930                                 || (address >= (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE)))
 931                         {
 932                                 if (!image_memory->cache)
 933                                         image_memory->cache = malloc(IMAGE_MEMORY_CACHE_SIZE);
 934
 935                                 if (target_read_buffer(image_memory->target, address & ~(IMAGE_MEMORY_CACHE_SIZE - 1),
 936                                         IMAGE_MEMORY_CACHE_SIZE, image_memory->cache) != ERROR_OK)
 937                                 {
 938                                         free(image_memory->cache);
 939                                         image_memory->cache = NULL;
 940                                         return ERROR_IMAGE_TEMPORARILY_UNAVAILABLE;
 941                                 }
 942                                 image_memory->cache_address = address & ~(IMAGE_MEMORY_CACHE_SIZE - 1);
 943                         }
 944
 945                         size_in_cache = (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE) - address;
 946
 947                         memcpy(buffer + *size_read,
 948                                 image_memory->cache + (address - image_memory->cache_address),
 949                                 (size_in_cache > size) ? size : size_in_cache
 950 );
 951
 952                         *size_read += (size_in_cache > size) ? size : size_in_cache;
 953                         address += (size_in_cache > size) ? size : size_in_cache;
 954                 }
 955         }
 956         else if (image->type == IMAGE_SRECORD)
 957         {
 958                 memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
 959                 *size_read = size;
 960
 961                 return ERROR_OK;
 962         }
 963         else if (image->type == IMAGE_BUILDER)
 964         {
 965                 memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
 966                 *size_read = size;
 967
 968                 return ERROR_OK;
 969         }
 970
 971         return ERROR_OK;
 972 }
 973
 974 int image_add_section(struct image *image, uint32_t base, uint32_t size, int flags, uint8_t *data)
 975 {
 976         struct imagesection *section;
 977
 978         /* only image builder supports adding sections */
 979         if (image->type != IMAGE_BUILDER)
 980                 return ERROR_INVALID_ARGUMENTS;
 981
 982         /* see if there's a previous section */
 983         if (image->num_sections)
 984         {
 985                 section = &image->sections[image->num_sections - 1];
 986
 987                 /* see if it's enough to extend the last section,
 988                  * adding data to previous sections or merging is not supported */
 989                 if (((section->base_address + section->size) == base) && (section->flags == flags))
 990                 {
 991                         section->private = realloc(section->private, section->size + size);
 992                         memcpy((uint8_t*)section->private + section->size, data, size);
 993                         section->size += size;
 994                         return ERROR_OK;
 995                 }
 996         }
 997
 998         /* allocate new section */
 999         image->num_sections++;
1000         image->sections = realloc(image->sections, sizeof(struct imagesection) * image->num_sections);
1001         section = &image->sections[image->num_sections - 1];
1002         section->base_address = base;
1003         section->size = size;
1004         section->flags = flags;
1005         section->private = malloc(sizeof(uint8_t) * size);
1006         memcpy((uint8_t*)section->private, data, size);
1007
1008         return ERROR_OK;
1009 }
1010
1011 void image_close(struct image *image)
1012 {
1013         if (image->type == IMAGE_BINARY)
1014         {
1015                 struct image_binary *image_binary = image->type_private;
1016
1017                 fileio_close(&image_binary->fileio);
1018         }
1019         else if (image->type == IMAGE_IHEX)
1020         {
1021                 struct image_ihex *image_ihex = image->type_private;
1022
1023                 fileio_close(&image_ihex->fileio);
1024
1025                 if (image_ihex->buffer)
1026                 {
1027                         free(image_ihex->buffer);
1028                         image_ihex->buffer = NULL;
1029                 }
1030         }
1031         else if (image->type == IMAGE_ELF)
1032         {
1033                 struct image_elf *image_elf = image->type_private;
1034
1035                 fileio_close(&image_elf->fileio);
1036
1037                 if (image_elf->header)
1038                 {
1039                         free(image_elf->header);
1040                         image_elf->header = NULL;
1041                 }
1042
1043                 if (image_elf->segments)
1044                 {
1045                         free(image_elf->segments);
1046                         image_elf->segments = NULL;
1047                 }
1048         }
1049         else if (image->type == IMAGE_MEMORY)
1050         {
1051                 struct image_memory *image_memory = image->type_private;
1052
1053                 if (image_memory->cache)
1054                 {
1055                         free(image_memory->cache);
1056                         image_memory->cache = NULL;
1057                 }
1058         }
1059         else if (image->type == IMAGE_SRECORD)
1060         {
1061                 struct image_mot *image_mot = image->type_private;
1062
1063                 fileio_close(&image_mot->fileio);
1064
1065                 if (image_mot->buffer)
1066                 {
1067                         free(image_mot->buffer);
1068                         image_mot->buffer = NULL;
1069                 }
1070         }
1071         else if (image->type == IMAGE_BUILDER)
1072         {
1073                 int i;
1074
1075                 for (i = 0; i < image->num_sections; i++)
1076                 {
1077                         free(image->sections[i].private);
1078                         image->sections[i].private = NULL;
1079                 }
1080         }
1081
1082         if (image->type_private)
1083         {
1084                 free(image->type_private);
1085                 image->type_private = NULL;
1086         }
1087
1088         if (image->sections)
1089         {
1090                 free(image->sections);
1091                 image->sections = NULL;
1092         }
1093 }
1094
1095 int image_calculate_checksum(uint8_t* buffer, uint32_t nbytes, uint32_t* checksum)
1096 {
1097         uint32_t crc = 0xffffffff;
1098         LOG_DEBUG("Calculating checksum");
1099
1100         static uint32_t crc32_table[256];
1101
1102         static bool first_init = false;
1103         if (!first_init)
1104         {
1105                 /* Initialize the CRC table and the decoding table.  */
1106                 int i, j;
1107                 unsigned int c;
1108                 for (i = 0; i < 256; i++)
1109                 {
1110                         /* as per gdb */
1111                         for (c = i << 24, j = 8; j > 0; --j)
1112                                 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
1113                         crc32_table[i] = c;
1114                 }
1115
1116                 first_init = true;
1117         }
1118
1119         while (nbytes > 0)
1120         {
1121                 int run = nbytes;
1122                 if (run > 32768)
1123                 {
1124                         run = 32768;
1125                 }
1126                 nbytes -= run;
1127                 while (run--)
1128                 {
1129                         /* as per gdb */
1130                         crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buffer++) & 255];
1131                 }
1132                 keep_alive();
1133         }
1134
1135         LOG_DEBUG("Calculating checksum done");
1136
1137         *checksum = crc;
1138         return ERROR_OK;
1139 }