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
 351                 if ((uint8_t)checksum != (uint8_t)(~cal_checksum + 1))
 352                 {
 353                         /* checksum failed */
 354                         LOG_ERROR("incorrect record checksum found in IHEX file");
 355                         return ERROR_IMAGE_CHECKSUM;
 356                 }
 357         }
 358
 359         LOG_ERROR("premature end of IHEX file, no end-of-file record found");
 360         return ERROR_IMAGE_FORMAT_ERROR;
 361 }
 362
 363 /**
 364  * Allocate memory dynamically instead of on the stack. This
 365  * is important w/embedded hosts.
 366  */
 367 static int image_ihex_buffer_complete(struct image *image)
 368 {
 369         char *lpszLine = malloc(1023);
 370         if (lpszLine == NULL)
 371         {
 372                 LOG_ERROR("Out of memory");
 373                 return ERROR_FAIL;
 374         }
 375         struct imagesection *section = malloc(sizeof(struct imagesection) * IMAGE_MAX_SECTIONS);
 376         if (section == NULL)
 377         {
 378                 free(lpszLine);
 379                 LOG_ERROR("Out of memory");
 380                 return ERROR_FAIL;
 381         }
 382         int retval;
 383
 384         retval = image_ihex_buffer_complete_inner(image, lpszLine, section);
 385
 386         free(section);
 387         free(lpszLine);
 388
 389         return retval;
 390 }
 391
 392 static int image_elf_read_headers(struct image *image)
 393 {
 394         struct image_elf *elf = image->type_private;
 395         size_t read_bytes;
 396         uint32_t i,j;
 397         int retval;
 398         uint32_t nload,load_to_vaddr=0;
 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
 475         assert(image->num_sections > 0);
 476
 477         /**
 478          * some ELF linkers produce binaries with *all* the program header
 479          * p_paddr fields zero (there can be however one loadable segment
 480          * that has valid physical address 0x0).
 481          * If we have such a binary with more than
 482          * one PT_LOAD header, then use p_vaddr instead of p_paddr
 483          * (ARM ELF standard demands p_paddr = 0 anyway, and BFD
 484          * library uses this approach to workaround zero-initialized p_paddrs
 485          * when obtaining lma - look at elf.c of BDF)
 486          */
 487         for (nload = 0, i = 0; i < elf->segment_count; i++)
 488                 if (elf->segments[i].p_paddr != 0)
 489                         break;
 490                 else if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_memsz) != 0))
 491                         ++nload;
 492
 493         if (i >= elf->segment_count && nload > 1)
 494                 load_to_vaddr = 1;
 495
 496         /* alloc and fill sections array with loadable segments */
 497         image->sections = malloc(image->num_sections * sizeof(struct imagesection));
 498         for (i = 0,j = 0;i < elf->segment_count;i++)
 499         {
 500                 if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_filesz) != 0))
 501                 {
 502                         image->sections[j].size = field32(elf,elf->segments[i].p_filesz);
 503                         if (load_to_vaddr)
 504                                 image->sections[j].base_address = field32(elf,elf->segments[i].p_vaddr);
 505                         else
 506                                 image->sections[j].base_address = field32(elf,elf->segments[i].p_paddr);
 507                         image->sections[j].private = &elf->segments[i];
 508                         image->sections[j].flags = field32(elf,elf->segments[i].p_flags);
 509                         j++;
 510                 }
 511         }
 512
 513         image->start_address_set = 1;
 514         image->start_address = field32(elf,elf->header->e_entry);
 515
 516         return ERROR_OK;
 517 }
 518
 519 static int image_elf_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, size_t *size_read)
 520 {
 521         struct image_elf *elf = image->type_private;
 522         Elf32_Phdr *segment = (Elf32_Phdr *)image->sections[section].private;
 523         size_t read_size,really_read;
 524         int retval;
 525
 526         *size_read = 0;
 527
 528         LOG_DEBUG("load segment %d at 0x%" PRIx32 " (sz = 0x%" PRIx32 ")",section,offset,size);
 529
 530         /* read initialized data in current segment if any */
 531         if (offset < field32(elf,segment->p_filesz))
 532         {
 533                 /* maximal size present in file for the current segment */
 534                 read_size = MIN(size, field32(elf,segment->p_filesz)-offset);
 535                 LOG_DEBUG("read elf: size = 0x%zu at 0x%" PRIx32 "", read_size,
 536                         field32(elf,segment->p_offset) + offset);
 537                 /* read initialized area of the segment */
 538                 if ((retval = fileio_seek(&elf->fileio, field32(elf,segment->p_offset) + offset)) != ERROR_OK)
 539                 {
 540                         LOG_ERROR("cannot find ELF segment content, seek failed");
 541                         return retval;
 542                 }
 543                 if ((retval = fileio_read(&elf->fileio, read_size, buffer, &really_read)) != ERROR_OK)
 544                 {
 545                         LOG_ERROR("cannot read ELF segment content, read failed");
 546                         return retval;
 547                 }
 548                 size -= read_size;
 549                 *size_read += read_size;
 550                 /* need more data ? */
 551                 if (!size)
 552                         return ERROR_OK;
 553         }
 554
 555         return ERROR_OK;
 556 }
 557
 558 static int image_mot_buffer_complete_inner(struct image *image, char *lpszLine, struct imagesection *section)
 559 {
 560         struct image_mot *mot = image->type_private;
 561         struct fileio *fileio = &mot->fileio;
 562         uint32_t full_address = 0x0;
 563         uint32_t cooked_bytes;
 564         int i;
 565
 566         /* we can't determine the number of sections that we'll have to create ahead of time,
 567          * so we locally hold them until parsing is finished */
 568
 569         int retval;
 570         int filesize;
 571         retval = fileio_size(fileio, &filesize);
 572         if (retval != ERROR_OK)
 573                 return retval;
 574
 575         mot->buffer = malloc(filesize >> 1);
 576         cooked_bytes = 0x0;
 577         image->num_sections = 0;
 578         section[image->num_sections].private = &mot->buffer[cooked_bytes];
 579         section[image->num_sections].base_address = 0x0;
 580         section[image->num_sections].size = 0x0;
 581         section[image->num_sections].flags = 0;
 582
 583         while (fileio_fgets(fileio, 1023, lpszLine) == ERROR_OK)
 584         {
 585                 uint32_t count;
 586                 uint32_t address;
 587                 uint32_t record_type;
 588                 uint32_t checksum;
 589                 uint8_t cal_checksum = 0;
 590                 uint32_t bytes_read = 0;
 591
 592                 /* get record type and record length */
 593                 if (sscanf(&lpszLine[bytes_read], "S%1" SCNx32 "%2" SCNx32 , &record_type, &count) != 2)
 594                 {
 595                         return ERROR_IMAGE_FORMAT_ERROR;
 596                 }
 597
 598                 bytes_read += 4;
 599                 cal_checksum += (uint8_t)count;
 600
 601                 /* skip checksum byte */
 602                 count -=1;
 603
 604                 if (record_type == 0)
 605                 {
 606                         /* S0 - starting record (optional) */
 607                         int iValue;
 608
 609                         while (count-- > 0) {
 610                                 sscanf(&lpszLine[bytes_read], "%2x", &iValue);
 611                                 cal_checksum += (uint8_t)iValue;
 612                                 bytes_read += 2;
 613                         }
 614                 }
 615                 else if (record_type >= 1 && record_type <= 3)
 616                 {
 617                         switch (record_type)
 618                         {
 619                                 case 1:
 620                                         /* S1 - 16 bit address data record */
 621                                         sscanf(&lpszLine[bytes_read], "%4" SCNx32, &address);
 622                                         cal_checksum += (uint8_t)(address >> 8);
 623                                         cal_checksum += (uint8_t)address;
 624                                         bytes_read += 4;
 625                                         count -=2;
 626                                         break;
 627
 628                                 case 2:
 629                                         /* S2 - 24 bit address data record */
 630                                         sscanf(&lpszLine[bytes_read], "%6" SCNx32 , &address);
 631                                         cal_checksum += (uint8_t)(address >> 16);
 632                                         cal_checksum += (uint8_t)(address >> 8);
 633                                         cal_checksum += (uint8_t)address;
 634                                         bytes_read += 6;
 635                                         count -=3;
 636                                         break;
 637
 638                                 case 3:
 639                                         /* S3 - 32 bit address data record */
 640                                         sscanf(&lpszLine[bytes_read], "%8" SCNx32 , &address);
 641                                         cal_checksum += (uint8_t)(address >> 24);
 642                                         cal_checksum += (uint8_t)(address >> 16);
 643                                         cal_checksum += (uint8_t)(address >> 8);
 644                                         cal_checksum += (uint8_t)address;
 645                                         bytes_read += 8;
 646                                         count -=4;
 647                                         break;
 648
 649                         }
 650
 651                         if (full_address != address)
 652                         {
 653                                 /* we encountered a nonconsecutive location, create a new section,
 654                                  * unless the current section has zero size, in which case this specifies
 655                                  * the current section's base address
 656                                  */
 657                                 if (section[image->num_sections].size != 0)
 658                                 {
 659                                         image->num_sections++;
 660                                         section[image->num_sections].size = 0x0;
 661                                         section[image->num_sections].flags = 0;
 662                                         section[image->num_sections].private = &mot->buffer[cooked_bytes];
 663                                 }
 664                                 section[image->num_sections].base_address = address;
 665                                 full_address = address;
 666                         }
 667
 668                         while (count-- > 0)
 669                         {
 670                                 unsigned value;
 671                                 sscanf(&lpszLine[bytes_read], "%2x", &value);
 672                                 mot->buffer[cooked_bytes] = (uint8_t)value;
 673                                 cal_checksum += (uint8_t)mot->buffer[cooked_bytes];
 674                                 bytes_read += 2;
 675                                 cooked_bytes += 1;
 676                                 section[image->num_sections].size += 1;
 677                                 full_address++;
 678                         }
 679                 }
 680                 else if (record_type == 5)
 681                 {
 682                         /* S5 is the data count record, we ignore it */
 683                         uint32_t dummy;
 684
 685                         while (count-- > 0)
 686                         {
 687                                 sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &dummy);
 688                                 cal_checksum += (uint8_t)dummy;
 689                                 bytes_read += 2;
 690                         }
 691                 }
 692                 else if (record_type >= 7 && record_type <= 9)
 693                 {
 694                         /* S7, S8, S9 - ending records for 32, 24 and 16bit */
 695                         image->num_sections++;
 696
 697                         /* copy section information */
 698                         image->sections = malloc(sizeof(struct imagesection) * image->num_sections);
 699                         for (i = 0; i < image->num_sections; i++)
 700                         {
 701                                 image->sections[i].private = section[i].private;
 702                                 image->sections[i].base_address = section[i].base_address;
 703                                 image->sections[i].size = section[i].size;
 704                                 image->sections[i].flags = section[i].flags;
 705                         }
 706
 707                         return ERROR_OK;
 708                 }
 709                 else
 710                 {
 711                   LOG_ERROR("unhandled S19 record type: %i", (int)(record_type));
 712                         return ERROR_IMAGE_FORMAT_ERROR;
 713                 }
 714
 715                 /* account for checksum, will always be 0xFF */
 716                 sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &checksum);
 717                 cal_checksum += (uint8_t)checksum;
 718
 719                 if (cal_checksum != 0xFF)
 720                 {
 721                         /* checksum failed */
 722                         LOG_ERROR("incorrect record checksum found in S19 file");
 723                         return ERROR_IMAGE_CHECKSUM;
 724                 }
 725         }
 726
 727         LOG_ERROR("premature end of S19 file, no end-of-file record found");
 728         return ERROR_IMAGE_FORMAT_ERROR;
 729 }
 730
 731 /**
 732  * Allocate memory dynamically instead of on the stack. This
 733  * is important w/embedded hosts.
 734  */
 735 static int image_mot_buffer_complete(struct image *image)
 736 {
 737         char *lpszLine = malloc(1023);
 738         if (lpszLine == NULL)
 739         {
 740                 LOG_ERROR("Out of memory");
 741                 return ERROR_FAIL;
 742         }
 743         struct imagesection *section = malloc(sizeof(struct imagesection) * IMAGE_MAX_SECTIONS);
 744         if (section == NULL)
 745         {
 746                 free(lpszLine);
 747                 LOG_ERROR("Out of memory");
 748                 return ERROR_FAIL;
 749         }
 750         int retval;
 751
 752         retval = image_mot_buffer_complete_inner(image, lpszLine, section);
 753
 754         free(section);
 755         free(lpszLine);
 756
 757         return retval;
 758 }
 759
 760
 761 int image_open(struct image *image, const char *url, const char *type_string)
 762 {
 763         int retval = ERROR_OK;
 764
 765         if ((retval = identify_image_type(image, type_string, url)) != ERROR_OK)
 766         {
 767                 return retval;
 768         }
 769
 770         if (image->type == IMAGE_BINARY)
 771         {
 772                 struct image_binary *image_binary;
 773
 774                 image_binary = image->type_private = malloc(sizeof(struct image_binary));
 775
 776                 if ((retval = fileio_open(&image_binary->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
 777                 {
 778                         return retval;
 779                 }
 780                 int filesize;
 781                 retval = fileio_size(&image_binary->fileio, &filesize);
 782                 if (retval != ERROR_OK)
 783                 {
 784                         fileio_close(&image_binary->fileio);
 785                         return retval;
 786                 }
 787
 788                 image->num_sections = 1;
 789                 image->sections = malloc(sizeof(struct imagesection));
 790                 image->sections[0].base_address = 0x0;
 791                 image->sections[0].size = filesize;
 792                 image->sections[0].flags = 0;
 793         }
 794         else if (image->type == IMAGE_IHEX)
 795         {
 796                 struct image_ihex *image_ihex;
 797
 798                 image_ihex = image->type_private = malloc(sizeof(struct image_ihex));
 799
 800                 if ((retval = fileio_open(&image_ihex->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
 801                 {
 802                         return retval;
 803                 }
 804
 805                 if ((retval = image_ihex_buffer_complete(image)) != ERROR_OK)
 806                 {
 807                         LOG_ERROR("failed buffering IHEX image, check daemon output for additional information");
 808                         fileio_close(&image_ihex->fileio);
 809                         return retval;
 810                 }
 811         }
 812         else if (image->type == IMAGE_ELF)
 813         {
 814                 struct image_elf *image_elf;
 815
 816                 image_elf = image->type_private = malloc(sizeof(struct image_elf));
 817
 818                 if ((retval = fileio_open(&image_elf->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
 819                 {
 820                         return retval;
 821                 }
 822
 823                 if ((retval = image_elf_read_headers(image)) != ERROR_OK)
 824                 {
 825                         fileio_close(&image_elf->fileio);
 826                         return retval;
 827                 }
 828         }
 829         else if (image->type == IMAGE_MEMORY)
 830         {
 831                 struct target *target = get_target(url);
 832
 833                 if (target == NULL)
 834                 {
 835                         LOG_ERROR("target '%s' not defined", url);
 836                         return ERROR_FAIL;
 837                 }
 838
 839                 struct image_memory *image_memory;
 840
 841                 image->num_sections = 1;
 842                 image->sections = malloc(sizeof(struct imagesection));
 843                 image->sections[0].base_address = 0x0;
 844                 image->sections[0].size = 0xffffffff;
 845                 image->sections[0].flags = 0;
 846
 847                 image_memory = image->type_private = malloc(sizeof(struct image_memory));
 848
 849                 image_memory->target = target;
 850                 image_memory->cache = NULL;
 851                 image_memory->cache_address = 0x0;
 852         }
 853         else if (image->type == IMAGE_SRECORD)
 854         {
 855                 struct image_mot *image_mot;
 856
 857                 image_mot = image->type_private = malloc(sizeof(struct image_mot));
 858
 859                 if ((retval = fileio_open(&image_mot->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
 860                 {
 861                         return retval;
 862                 }
 863
 864                 if ((retval = image_mot_buffer_complete(image)) != ERROR_OK)
 865                 {
 866                         LOG_ERROR("failed buffering S19 image, check daemon output for additional information");
 867                         fileio_close(&image_mot->fileio);
 868                         return retval;
 869                 }
 870         }
 871         else if (image->type == IMAGE_BUILDER)
 872         {
 873                 image->num_sections = 0;
 874                 image->sections = NULL;
 875                 image->type_private = NULL;
 876         }
 877
 878         if (image->base_address_set)
 879         {
 880                 /* relocate */
 881                 int section;
 882                 for (section = 0; section < image->num_sections; section++)
 883                 {
 884                         image->sections[section].base_address += image->base_address;
 885                 }
 886                 /* we're done relocating. The two statements below are mainly
 887                  * for documenation purposes: stop anyone from empirically
 888                  * thinking they should use these values henceforth. */
 889                 image->base_address = 0;
 890                 image->base_address_set = 0;
 891         }
 892
 893         return retval;
 894 };
 895
 896 int image_read_section(struct image *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, size_t *size_read)
 897 {
 898         int retval;
 899
 900         /* don't read past the end of a section */
 901         if (offset + size > image->sections[section].size)
 902         {
 903                 LOG_DEBUG("read past end of section: 0x%8.8" PRIx32 " + 0x%8.8" PRIx32 " > 0x%8.8" PRIx32 "",
 904                                 offset, size, image->sections[section].size);
 905                 return ERROR_INVALID_ARGUMENTS;
 906         }
 907
 908         if (image->type == IMAGE_BINARY)
 909         {
 910                 struct image_binary *image_binary = image->type_private;
 911
 912                 /* only one section in a plain binary */
 913                 if (section != 0)
 914                         return ERROR_INVALID_ARGUMENTS;
 915
 916                 /* seek to offset */
 917                 if ((retval = fileio_seek(&image_binary->fileio, offset)) != ERROR_OK)
 918                 {
 919                         return retval;
 920                 }
 921
 922                 /* return requested bytes */
 923                 if ((retval = fileio_read(&image_binary->fileio, size, buffer, size_read)) != ERROR_OK)
 924                 {
 925                         return retval;
 926                 }
 927         }
 928         else if (image->type == IMAGE_IHEX)
 929         {
 930                 memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
 931                 *size_read = size;
 932
 933                 return ERROR_OK;
 934         }
 935         else if (image->type == IMAGE_ELF)
 936         {
 937                 return image_elf_read_section(image, section, offset, size, buffer, size_read);
 938         }
 939         else if (image->type == IMAGE_MEMORY)
 940         {
 941                 struct image_memory *image_memory = image->type_private;
 942                 uint32_t address = image->sections[section].base_address + offset;
 943
 944                 *size_read = 0;
 945
 946                 while ((size - *size_read) > 0)
 947                 {
 948                         uint32_t size_in_cache;
 949
 950                         if (!image_memory->cache
 951                                 || (address < image_memory->cache_address)
 952                                 || (address >= (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE)))
 953                         {
 954                                 if (!image_memory->cache)
 955                                         image_memory->cache = malloc(IMAGE_MEMORY_CACHE_SIZE);
 956
 957                                 if (target_read_buffer(image_memory->target, address & ~(IMAGE_MEMORY_CACHE_SIZE - 1),
 958                                         IMAGE_MEMORY_CACHE_SIZE, image_memory->cache) != ERROR_OK)
 959                                 {
 960                                         free(image_memory->cache);
 961                                         image_memory->cache = NULL;
 962                                         return ERROR_IMAGE_TEMPORARILY_UNAVAILABLE;
 963                                 }
 964                                 image_memory->cache_address = address & ~(IMAGE_MEMORY_CACHE_SIZE - 1);
 965                         }
 966
 967                         size_in_cache = (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE) - address;
 968
 969                         memcpy(buffer + *size_read,
 970                                 image_memory->cache + (address - image_memory->cache_address),
 971                                 (size_in_cache > size) ? size : size_in_cache
 972 );
 973
 974                         *size_read += (size_in_cache > size) ? size : size_in_cache;
 975                         address += (size_in_cache > size) ? size : size_in_cache;
 976                 }
 977         }
 978         else if (image->type == IMAGE_SRECORD)
 979         {
 980                 memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
 981                 *size_read = size;
 982
 983                 return ERROR_OK;
 984         }
 985         else if (image->type == IMAGE_BUILDER)
 986         {
 987                 memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
 988                 *size_read = size;
 989
 990                 return ERROR_OK;
 991         }
 992
 993         return ERROR_OK;
 994 }
 995
 996 int image_add_section(struct image *image, uint32_t base, uint32_t size, int flags, uint8_t *data)
 997 {
 998         struct imagesection *section;
 999
1000         /* only image builder supports adding sections */
1001         if (image->type != IMAGE_BUILDER)
1002                 return ERROR_INVALID_ARGUMENTS;
1003
1004         /* see if there's a previous section */
1005         if (image->num_sections)
1006         {
1007                 section = &image->sections[image->num_sections - 1];
1008
1009                 /* see if it's enough to extend the last section,
1010                  * adding data to previous sections or merging is not supported */
1011                 if (((section->base_address + section->size) == base) && (section->flags == flags))
1012                 {
1013                         section->private = realloc(section->private, section->size + size);
1014                         memcpy((uint8_t*)section->private + section->size, data, size);
1015                         section->size += size;
1016                         return ERROR_OK;
1017                 }
1018         }
1019
1020         /* allocate new section */
1021         image->num_sections++;
1022         image->sections = realloc(image->sections, sizeof(struct imagesection) * image->num_sections);
1023         section = &image->sections[image->num_sections - 1];
1024         section->base_address = base;
1025         section->size = size;
1026         section->flags = flags;
1027         section->private = malloc(sizeof(uint8_t) * size);
1028         memcpy((uint8_t*)section->private, data, size);
1029
1030         return ERROR_OK;
1031 }
1032
1033 void image_close(struct image *image)
1034 {
1035         if (image->type == IMAGE_BINARY)
1036         {
1037                 struct image_binary *image_binary = image->type_private;
1038
1039                 fileio_close(&image_binary->fileio);
1040         }
1041         else if (image->type == IMAGE_IHEX)
1042         {
1043                 struct image_ihex *image_ihex = image->type_private;
1044
1045                 fileio_close(&image_ihex->fileio);
1046
1047                 if (image_ihex->buffer)
1048                 {
1049                         free(image_ihex->buffer);
1050                         image_ihex->buffer = NULL;
1051                 }
1052         }
1053         else if (image->type == IMAGE_ELF)
1054         {
1055                 struct image_elf *image_elf = image->type_private;
1056
1057                 fileio_close(&image_elf->fileio);
1058
1059                 if (image_elf->header)
1060                 {
1061                         free(image_elf->header);
1062                         image_elf->header = NULL;
1063                 }
1064
1065                 if (image_elf->segments)
1066                 {
1067                         free(image_elf->segments);
1068                         image_elf->segments = NULL;
1069                 }
1070         }
1071         else if (image->type == IMAGE_MEMORY)
1072         {
1073                 struct image_memory *image_memory = image->type_private;
1074
1075                 if (image_memory->cache)
1076                 {
1077                         free(image_memory->cache);
1078                         image_memory->cache = NULL;
1079                 }
1080         }
1081         else if (image->type == IMAGE_SRECORD)
1082         {
1083                 struct image_mot *image_mot = image->type_private;
1084
1085                 fileio_close(&image_mot->fileio);
1086
1087                 if (image_mot->buffer)
1088                 {
1089                         free(image_mot->buffer);
1090                         image_mot->buffer = NULL;
1091                 }
1092         }
1093         else if (image->type == IMAGE_BUILDER)
1094         {
1095                 int i;
1096
1097                 for (i = 0; i < image->num_sections; i++)
1098                 {
1099                         free(image->sections[i].private);
1100                         image->sections[i].private = NULL;
1101                 }
1102         }
1103
1104         if (image->type_private)
1105         {
1106                 free(image->type_private);
1107                 image->type_private = NULL;
1108         }
1109
1110         if (image->sections)
1111         {
1112                 free(image->sections);
1113                 image->sections = NULL;
1114         }
1115 }
1116
1117 int image_calculate_checksum(uint8_t* buffer, uint32_t nbytes, uint32_t* checksum)
1118 {
1119         uint32_t crc = 0xffffffff;
1120         LOG_DEBUG("Calculating checksum");
1121
1122         static uint32_t crc32_table[256];
1123
1124         static bool first_init = false;
1125         if (!first_init)
1126         {
1127                 /* Initialize the CRC table and the decoding table.  */
1128                 int i, j;
1129                 unsigned int c;
1130                 for (i = 0; i < 256; i++)
1131                 {
1132                         /* as per gdb */
1133                         for (c = i << 24, j = 8; j > 0; --j)
1134                                 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
1135                         crc32_table[i] = c;
1136                 }
1137
1138                 first_init = true;
1139         }
1140
1141         while (nbytes > 0)
1142         {
1143                 int run = nbytes;
1144                 if (run > 32768)
1145                 {
1146                         run = 32768;
1147                 }
1148                 nbytes -= run;
1149                 while (run--)
1150                 {
1151                         /* as per gdb */
1152                         crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buffer++) & 255];
1153                 }
1154                 keep_alive();
1155         }
1156
1157         LOG_DEBUG("Calculating checksum done");
1158
1159         *checksum = crc;
1160         return ERROR_OK;
1161 }