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   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #ifdef HAVE_ELF_H
  27 #include <elf.h>
  28 #endif
  29
  30 #include "image.h"
  31
  32 #include "types.h"
  33 #include "replacements.h"
  34 #include "log.h"
  35
  36 #include "fileio.h"
  37 #include "target.h"
  38
  39 /* convert ELF header field to host endianness */
  40 #define field16(elf,field)\
  41         ((elf->endianness==ELFDATA2LSB)? \
  42                 le_to_h_u16((u8*)&field):be_to_h_u16((u8*)&field))
  43
  44 #define field32(elf,field)\
  45         ((elf->endianness==ELFDATA2LSB)? \
  46                 le_to_h_u32((u8*)&field):be_to_h_u32((u8*)&field))
  47
  48 static int autodetect_image_type(image_t *image, char *url)
  49 {
  50         int retval;
  51         fileio_t fileio;
  52         u32 read_bytes;
  53         u8 buffer[9];
  54
  55         /* read the first 4 bytes of image */
  56         if ((retval = fileio_open(&fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
  57         {
  58                 snprintf(image->error_str, IMAGE_MAX_ERROR_STRING, "cannot open image: %s", fileio.error_str);
  59                 ERROR(image->error_str);
  60                 return retval;
  61         }
  62         if ((retval = fileio_read(&fileio, 9, buffer, &read_bytes)) != ERROR_OK)
  63         {
  64                 snprintf(image->error_str, IMAGE_MAX_ERROR_STRING, "cannot read image header: %s", fileio.error_str);
  65                 ERROR(image->error_str);
  66                 return ERROR_FILEIO_OPERATION_FAILED;
  67         }
  68         if (read_bytes != 9)
  69         {
  70                 snprintf(image->error_str, IMAGE_MAX_ERROR_STRING, "cannot read image, only partially read");
  71                 ERROR(image->error_str);
  72                 return ERROR_FILEIO_OPERATION_FAILED;
  73         }
  74         fileio_close(&fileio);
  75
  76         /* check header against known signatures */
  77         if (strncmp((char*)buffer,ELFMAG,SELFMAG)==0)
  78         {
  79                 DEBUG("ELF image detected.");
  80                 image->type = IMAGE_ELF;
  81         }
  82         else if  ((buffer[0]==':') /* record start byte */
  83                 &&(isxdigit(buffer[1]))
  84                 &&(isxdigit(buffer[2]))
  85                 &&(isxdigit(buffer[3]))
  86                 &&(isxdigit(buffer[4]))
  87                 &&(isxdigit(buffer[5]))
  88                 &&(isxdigit(buffer[6]))
  89                 &&(buffer[7]=='0') /* record type : 00 -> 05 */
  90                 &&(buffer[8]>='0')&&(buffer[8]<'6'))
  91         {
  92                 DEBUG("IHEX image detected.");
  93                 image->type = IMAGE_IHEX;
  94         }
  95         else if ((buffer[0] == 'S') /* record start byte */
  96                 &&(isxdigit(buffer[1]))
  97                 &&(isxdigit(buffer[2]))
  98                 &&(isxdigit(buffer[3]))
  99                 &&(buffer[1] >= '0') && (buffer[1] < '9'))
 100         {
 101                 DEBUG("S19 image detected.");
 102                 image->type = IMAGE_SRECORD;
 103         }
 104         else
 105         {
 106                 image->type = IMAGE_BINARY;
 107         }
 108
 109         return ERROR_OK;
 110 }
 111
 112 int identify_image_type(image_t *image, char *type_string, char *url)
 113 {
 114         if (type_string)
 115         {
 116                 if (!strcmp(type_string, "bin"))
 117                 {
 118                         image->type = IMAGE_BINARY;
 119                 }
 120                 else if (!strcmp(type_string, "ihex"))
 121                 {
 122                         image->type = IMAGE_IHEX;
 123                 }
 124                 else if (!strcmp(type_string, "elf"))
 125                 {
 126                         image->type = IMAGE_ELF;
 127                 }
 128                 else if (!strcmp(type_string, "mem"))
 129                 {
 130                         image->type = IMAGE_MEMORY;
 131                 }
 132                 else if (!strcmp(type_string, "s19"))
 133                 {
 134                         image->type = IMAGE_SRECORD;
 135                 }
 136                 else if (!strcmp(type_string, "build"))
 137                 {
 138                         image->type = IMAGE_BUILDER;
 139                 }
 140                 else
 141                 {
 142                         return ERROR_IMAGE_TYPE_UNKNOWN;
 143                 }
 144         }
 145         else
 146         {
 147                 return autodetect_image_type(image, url);
 148         }
 149
 150         return ERROR_OK;
 151 }
 152
 153 int image_ihex_buffer_complete(image_t *image)
 154 {
 155         image_ihex_t *ihex = image->type_private;
 156         fileio_t *fileio = &ihex->fileio;
 157         u32 full_address = 0x0;
 158         u32 cooked_bytes;
 159         int i;
 160         char lpszLine[1023];
 161
 162         /* we can't determine the number of sections that we'll have to create ahead of time,
 163          * so we locally hold them until parsing is finished */
 164         image_section_t section[IMAGE_MAX_SECTIONS];
 165
 166         ihex->buffer = malloc(fileio->size >> 1);
 167         cooked_bytes = 0x0;
 168         image->num_sections = 0;
 169         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 170         section[image->num_sections].base_address = 0x0;
 171         section[image->num_sections].size = 0x0;
 172         section[image->num_sections].flags = 0;
 173
 174         while (fileio_fgets(fileio, 1023, lpszLine) == ERROR_OK)
 175         {
 176                 u32 count;
 177                 u32 address;
 178                 u32 record_type;
 179                 u32 checksum;
 180                 u8 cal_checksum = 0;
 181                 u32 bytes_read = 0;
 182
 183                 if (sscanf(&lpszLine[bytes_read], ":%2x%4x%2x", &count, &address, &record_type) != 3)
 184                 {
 185                         return ERROR_IMAGE_FORMAT_ERROR;
 186                 }
 187                 bytes_read += 9;
 188
 189                 cal_checksum += (u8)count;
 190                 cal_checksum += (u8)(address >> 8);
 191                 cal_checksum += (u8)address;
 192                 cal_checksum += (u8)record_type;
 193
 194                 if (record_type == 0) /* Data Record */
 195                 {
 196                         if ((full_address & 0xffff) != address)
 197                         {
 198                                 /* we encountered a nonconsecutive location, create a new section,
 199                                  * unless the current section has zero size, in which case this specifies
 200                                  * the current section's base address
 201                                  */
 202                                 if (section[image->num_sections].size != 0)
 203                                 {
 204                                         image->num_sections++;
 205                                         section[image->num_sections].size = 0x0;
 206                                         section[image->num_sections].flags = 0;
 207                                         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 208                                 }
 209                                 section[image->num_sections].base_address =
 210                                         (full_address & 0xffff0000) | address;
 211                                 full_address = (full_address & 0xffff0000) | address;
 212                         }
 213
 214                         while (count-- > 0)
 215                         {
 216                                 sscanf(&lpszLine[bytes_read], "%2x", (u32*)&ihex->buffer[cooked_bytes]);
 217                                 cal_checksum += (u8)ihex->buffer[cooked_bytes];
 218                                 bytes_read += 2;
 219                                 cooked_bytes += 1;
 220                                 section[image->num_sections].size += 1;
 221                                 full_address++;
 222                         }
 223                 }
 224                 else if (record_type == 1) /* End of File Record */
 225                 {
 226                         /* finish the current section */
 227                         image->num_sections++;
 228
 229                         /* copy section information */
 230                         image->sections = malloc(sizeof(image_section_t) * image->num_sections);
 231                         for (i = 0; i < image->num_sections; i++)
 232                         {
 233                                 image->sections[i].private = section[i].private;
 234                                 image->sections[i].base_address = section[i].base_address;
 235                                 image->sections[i].size = section[i].size;
 236                                 image->sections[i].flags = section[i].flags;
 237                         }
 238
 239                         return ERROR_OK;
 240                 }
 241                 else if (record_type == 2) /* Linear Address Record */
 242                 {
 243                         u16 upper_address;
 244
 245                         sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
 246                         cal_checksum += (u8)(upper_address >> 8);
 247                         cal_checksum += (u8)upper_address;
 248                         bytes_read += 4;
 249
 250                         if ((full_address >> 4) != upper_address)
 251                         {
 252                                 /* we encountered a nonconsecutive location, create a new section,
 253                                  * unless the current section has zero size, in which case this specifies
 254                                  * the current section's base address
 255                                  */
 256                                 if (section[image->num_sections].size != 0)
 257                                 {
 258                                         image->num_sections++;
 259                                         section[image->num_sections].size = 0x0;
 260                                         section[image->num_sections].flags = 0;
 261                                         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 262                                 }
 263                                 section[image->num_sections].base_address =
 264                                         (full_address & 0xffff) | (upper_address << 4);
 265                                 full_address = (full_address & 0xffff) | (upper_address << 4);
 266                         }
 267                 }
 268                 else if (record_type == 3) /* Start Segment Address Record */
 269                 {
 270                         u32 dummy;
 271
 272                         /* "Start Segment Address Record" will not be supported */
 273                         /* but we must consume it, and do not create an error.  */
 274                         while (count-- > 0)
 275                         {
 276                                 sscanf(&lpszLine[bytes_read], "%2x", &dummy);
 277                                 cal_checksum += (u8)dummy;
 278                                 bytes_read += 2;
 279                         }
 280                 }
 281                 else if (record_type == 4) /* Extended Linear Address Record */
 282                 {
 283                         u16 upper_address;
 284
 285                         sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
 286                         cal_checksum += (u8)(upper_address >> 8);
 287                         cal_checksum += (u8)upper_address;
 288                         bytes_read += 4;
 289
 290                         if ((full_address >> 16) != upper_address)
 291                         {
 292                                 /* we encountered a nonconsecutive location, create a new section,
 293                                  * unless the current section has zero size, in which case this specifies
 294                                  * the current section's base address
 295                                  */
 296                                 if (section[image->num_sections].size != 0)
 297                                 {
 298                                         image->num_sections++;
 299                                         section[image->num_sections].size = 0x0;
 300                                         section[image->num_sections].flags = 0;
 301                                         section[image->num_sections].private = &ihex->buffer[cooked_bytes];
 302                                 }
 303                                 section[image->num_sections].base_address =
 304                                         (full_address & 0xffff) | (upper_address << 16);
 305                                 full_address = (full_address & 0xffff) | (upper_address << 16);
 306                         }
 307                 }
 308                 else if (record_type == 5) /* Start Linear Address Record */
 309                 {
 310                         u32 start_address;
 311
 312                         sscanf(&lpszLine[bytes_read], "%8x", &start_address);
 313                         cal_checksum += (u8)(start_address >> 24);
 314                         cal_checksum += (u8)(start_address >> 16);
 315                         cal_checksum += (u8)(start_address >> 8);
 316                         cal_checksum += (u8)start_address;
 317                         bytes_read += 8;
 318
 319                         image->start_address_set = 1;
 320                         image->start_address = be_to_h_u32((u8*)&start_address);
 321                 }
 322                 else
 323                 {
 324                         ERROR("unhandled IHEX record type: %i", record_type);
 325                         return ERROR_IMAGE_FORMAT_ERROR;
 326                 }
 327
 328                 sscanf(&lpszLine[bytes_read], "%2x", &checksum);
 329                 bytes_read += 2;
 330
 331                 if ((u8)checksum != (u8)(~cal_checksum + 1))
 332                 {
 333                         /* checksum failed */
 334                         ERROR("incorrect record checksum found in IHEX file");
 335                         return ERROR_IMAGE_CHECKSUM;
 336                 }
 337         }
 338
 339         ERROR("premature end of IHEX file, no end-of-file record found");
 340         return ERROR_IMAGE_FORMAT_ERROR;
 341 }
 342
 343 int image_elf_read_headers(image_t *image)
 344 {
 345         image_elf_t *elf = image->type_private;
 346         u32 read_bytes;
 347         u32 i,j;
 348         int retval;
 349
 350         elf->header = malloc(sizeof(Elf32_Ehdr));
 351
 352         if ((retval = fileio_read(&elf->fileio, sizeof(Elf32_Ehdr), (u8*)elf->header, &read_bytes)) != ERROR_OK)
 353         {
 354                 ERROR("cannot read ELF file header, read failed");
 355                 return ERROR_FILEIO_OPERATION_FAILED;
 356         }
 357         if (read_bytes != sizeof(Elf32_Ehdr))
 358         {
 359                 ERROR("cannot read ELF file header, only partially read");
 360                 return ERROR_FILEIO_OPERATION_FAILED;
 361         }
 362
 363         if (strncmp((char*)elf->header->e_ident,ELFMAG,SELFMAG)!=0)
 364         {
 365                 ERROR("invalid ELF file, bad magic number");
 366                 return ERROR_IMAGE_FORMAT_ERROR;
 367         }
 368         if (elf->header->e_ident[EI_CLASS]!=ELFCLASS32)
 369         {
 370                 ERROR("invalid ELF file, only 32bits files are supported");
 371                 return ERROR_IMAGE_FORMAT_ERROR;
 372         }
 373
 374
 375         elf->endianness = elf->header->e_ident[EI_DATA];
 376         if ((elf->endianness!=ELFDATA2LSB)
 377                  &&(elf->endianness!=ELFDATA2MSB))
 378         {
 379                 ERROR("invalid ELF file, unknown endianess setting");
 380                 return ERROR_IMAGE_FORMAT_ERROR;
 381         }
 382
 383         elf->segment_count = field16(elf,elf->header->e_phnum);
 384         if (elf->segment_count==0)
 385         {
 386                 ERROR("invalid ELF file, no program headers");
 387                 return ERROR_IMAGE_FORMAT_ERROR;
 388         }
 389
 390         elf->segments = malloc(elf->segment_count*sizeof(Elf32_Phdr));
 391
 392         if ((retval = fileio_read(&elf->fileio, elf->segment_count*sizeof(Elf32_Phdr), (u8*)elf->segments, &read_bytes)) != ERROR_OK)
 393         {
 394                 ERROR("cannot read ELF segment headers, read failed");
 395                 return retval;
 396         }
 397         if (read_bytes != elf->segment_count*sizeof(Elf32_Phdr))
 398         {
 399                 ERROR("cannot read ELF segment headers, only partially read");
 400                 return ERROR_FILEIO_OPERATION_FAILED;
 401         }
 402
 403         /* count useful segments (loadable), ignore BSS section */
 404         image->num_sections = 0;
 405         for (i=0;i<elf->segment_count;i++)
 406                 if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_filesz) != 0))
 407                         image->num_sections++;
 408         /* alloc and fill sections array with loadable segments */
 409         image->sections = malloc(image->num_sections * sizeof(image_section_t));
 410         for (i=0,j=0;i<elf->segment_count;i++)
 411         {
 412                 if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_filesz) != 0))
 413                 {
 414                         image->sections[j].size = field32(elf,elf->segments[i].p_memsz);
 415                         image->sections[j].base_address = field32(elf,elf->segments[i].p_paddr);
 416                         image->sections[j].private = &elf->segments[i];
 417                         image->sections[j].flags = field32(elf,elf->segments[i].p_flags);
 418                         j++;
 419                 }
 420         }
 421
 422         image->start_address_set = 1;
 423         image->start_address = field32(elf,elf->header->e_entry);
 424
 425         return ERROR_OK;
 426 }
 427
 428 int image_elf_read_section(image_t *image, int section, u32 offset, u32 size, u8 *buffer, u32 *size_read)
 429 {
 430         image_elf_t *elf = image->type_private;
 431         Elf32_Phdr *segment = (Elf32_Phdr *)image->sections[section].private;
 432         u32 read_size,really_read;
 433         int retval;
 434
 435         *size_read = 0;
 436
 437         DEBUG("load segment %d at 0x%x (sz=0x%x)",section,offset,size);
 438
 439         /* read initialized data in current segment if any */
 440         if (offset<field32(elf,segment->p_filesz))
 441         {
 442                 /* maximal size present in file for the current segment */
 443                 read_size = MIN(size, field32(elf,segment->p_filesz)-offset);
 444                 DEBUG("read elf: size = 0x%x at 0x%x",read_size,
 445                         field32(elf,segment->p_offset)+offset);
 446                 /* read initialized area of the segment */
 447                 if ((retval = fileio_seek(&elf->fileio, field32(elf,segment->p_offset)+offset)) != ERROR_OK)
 448                 {
 449                         ERROR("cannot find ELF segment content, seek failed");
 450                         return retval;
 451                 }
 452                 if ((retval = fileio_read(&elf->fileio, read_size, buffer, &really_read)) != ERROR_OK)
 453                 {
 454                         ERROR("cannot read ELF segment content, read failed");
 455                         return retval;
 456                 }
 457                 buffer += read_size;
 458                 size -= read_size;
 459                 offset += read_size;
 460                 *size_read += read_size;
 461                 /* need more data ? */
 462                 if (!size)
 463                         return ERROR_OK;
 464         }
 465         /* if there is remaining zeroed area in current segment */
 466         if (offset<field32(elf,segment->p_memsz))
 467         {
 468                 /* fill zeroed part (BSS) of the segment */
 469                 read_size = MIN(size, field32(elf,segment->p_memsz)-offset);
 470                 DEBUG("zero fill: size = 0x%x",read_size);
 471                 memset(buffer,0,read_size);
 472                 *size_read += read_size;
 473         }
 474
 475         return ERROR_OK;
 476 }
 477
 478 int image_mot_buffer_complete(image_t *image)
 479 {
 480         image_mot_t *mot = image->type_private;
 481         fileio_t *fileio = &mot->fileio;
 482         u32 full_address = 0x0;
 483         u32 cooked_bytes;
 484         int i;
 485         char lpszLine[1023];
 486
 487         /* we can't determine the number of sections that we'll have to create ahead of time,
 488          * so we locally hold them until parsing is finished */
 489         image_section_t section[IMAGE_MAX_SECTIONS];
 490
 491         mot->buffer = malloc(fileio->size >> 1);
 492         cooked_bytes = 0x0;
 493         image->num_sections = 0;
 494         section[image->num_sections].private = &mot->buffer[cooked_bytes];
 495         section[image->num_sections].base_address = 0x0;
 496         section[image->num_sections].size = 0x0;
 497         section[image->num_sections].flags = 0;
 498
 499         while (fileio_fgets(fileio, 1023, lpszLine) == ERROR_OK)
 500         {
 501                 u32 count;
 502                 u32 address;
 503                 u32 record_type;
 504                 u32 checksum;
 505                 u8 cal_checksum = 0;
 506                 u32 bytes_read = 0;
 507
 508                 /* get record type and record length */
 509                 if (sscanf(&lpszLine[bytes_read], "S%1x%2x", &record_type, &count) != 2)
 510                 {
 511                         return ERROR_IMAGE_FORMAT_ERROR;
 512                 }
 513
 514                 bytes_read += 4;
 515                 cal_checksum += (u8)count;
 516
 517                 /* skip checksum byte */
 518                 count -=1;
 519
 520                 if (record_type == 0)
 521                 {
 522                         /* S0 - starting record (optional) */
 523                         int iValue;
 524
 525                         while (count-- > 0) {
 526                                 sscanf(&lpszLine[bytes_read], "%2x", &iValue);
 527                                 cal_checksum += (u8)iValue;
 528                                 bytes_read += 2;
 529                         }
 530                 }
 531                 else if (record_type >= 1 && record_type <= 3)
 532                 {
 533                         switch( record_type )
 534                         {
 535                                 case 1:
 536                                         /* S1 - 16 bit address data record */
 537                                         sscanf(&lpszLine[bytes_read], "%4x", &address);
 538                                         cal_checksum += (u8)(address >> 8);
 539                                         cal_checksum += (u8)address;
 540                                         bytes_read += 4;
 541                                         count -=2;
 542                                         break;
 543
 544                                 case 2:
 545                                         /* S2 - 24 bit address data record */
 546                                         sscanf(&lpszLine[bytes_read], "%6x", &address);
 547                                         cal_checksum += (u8)(address >> 16);
 548                                         cal_checksum += (u8)(address >> 8);
 549                                         cal_checksum += (u8)address;
 550                                         bytes_read += 6;
 551                                         count -=3;
 552                                         break;
 553
 554                                 case 3:
 555                                         /* S3 - 32 bit address data record */
 556                                         sscanf(&lpszLine[bytes_read], "%8x", &address);
 557                                         cal_checksum += (u8)(address >> 24);
 558                                         cal_checksum += (u8)(address >> 16);
 559                                         cal_checksum += (u8)(address >> 8);
 560                                         cal_checksum += (u8)address;
 561                                         bytes_read += 8;
 562                                         count -=4;
 563                                         break;
 564
 565                         }
 566
 567                         if (full_address != address)
 568                         {
 569                                 /* we encountered a nonconsecutive location, create a new section,
 570                                  * unless the current section has zero size, in which case this specifies
 571                                  * the current section's base address
 572                                  */
 573                                 if (section[image->num_sections].size != 0)
 574                                 {
 575                                         image->num_sections++;
 576                                         section[image->num_sections].size = 0x0;
 577                                         section[image->num_sections].flags = 0;
 578                                         section[image->num_sections].private = &mot->buffer[cooked_bytes];
 579                                 }
 580                                 section[image->num_sections].base_address = address;
 581                                 full_address = address;
 582                         }
 583
 584                         while (count-- > 0)
 585                         {
 586                                 sscanf(&lpszLine[bytes_read], "%2x", (u32*)&mot->buffer[cooked_bytes]);
 587                                 cal_checksum += (u8)mot->buffer[cooked_bytes];
 588                                 bytes_read += 2;
 589                                 cooked_bytes += 1;
 590                                 section[image->num_sections].size += 1;
 591                                 full_address++;
 592                         }
 593                 }
 594                 else if (record_type == 5)
 595                 {
 596                         /* S5 is the data count record, we ignore it */
 597                         u32 dummy;
 598
 599                         while (count-- > 0)
 600                         {
 601                                 sscanf(&lpszLine[bytes_read], "%2x", &dummy);
 602                                 cal_checksum += (u8)dummy;
 603                                 bytes_read += 2;
 604                         }
 605                 }
 606                 else if (record_type >= 7 && record_type <= 9)
 607                 {
 608                         /* S7, S8, S9 - ending records for 32, 24 and 16bit */
 609                         image->num_sections++;
 610
 611                         /* copy section information */
 612                         image->sections = malloc(sizeof(image_section_t) * image->num_sections);
 613                         for (i = 0; i < image->num_sections; i++)
 614                         {
 615                                 image->sections[i].private = section[i].private;
 616                                 image->sections[i].base_address = section[i].base_address;
 617                                 image->sections[i].size = section[i].size;
 618                                 image->sections[i].flags = section[i].flags;
 619                         }
 620
 621                         return ERROR_OK;
 622                 }
 623                 else
 624                 {
 625                         ERROR("unhandled S19 record type: %i", record_type);
 626                         return ERROR_IMAGE_FORMAT_ERROR;
 627                 }
 628
 629                 /* account for checksum, will always be 0xFF */
 630                 sscanf(&lpszLine[bytes_read], "%2x", &checksum);
 631                 cal_checksum += (u8)checksum;
 632                 bytes_read += 2;
 633
 634                 if( cal_checksum != 0xFF )
 635                 {
 636                         /* checksum failed */
 637                         ERROR("incorrect record checksum found in S19 file");
 638                         return ERROR_IMAGE_CHECKSUM;
 639                 }
 640         }
 641
 642         ERROR("premature end of S19 file, no end-of-file record found");
 643         return ERROR_IMAGE_FORMAT_ERROR;
 644 }
 645
 646 int image_open(image_t *image, char *url, char *type_string)
 647 {
 648         int retval = ERROR_OK;
 649
 650         if ((retval = identify_image_type(image, type_string, url)) != ERROR_OK)
 651         {
 652                 return retval;
 653         }
 654
 655         if (image->type == IMAGE_BINARY)
 656         {
 657                 image_binary_t *image_binary;
 658
 659                 image_binary = image->type_private = malloc(sizeof(image_binary_t));
 660
 661                 if ((retval = fileio_open(&image_binary->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
 662                 {
 663                         strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 664                         ERROR(image->error_str);
 665                         return retval;
 666                 }
 667
 668                 image->num_sections = 1;
 669                 image->sections = malloc(sizeof(image_section_t));
 670                 image->sections[0].base_address = 0x0;
 671                 image->sections[0].size = image_binary->fileio.size;
 672                 image->sections[0].flags = 0;
 673         }
 674         else if (image->type == IMAGE_IHEX)
 675         {
 676                 image_ihex_t *image_ihex;
 677
 678                 image_ihex = image->type_private = malloc(sizeof(image_ihex_t));
 679
 680                 if ((retval = fileio_open(&image_ihex->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
 681                 {
 682                         strncpy(image->error_str, image_ihex->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 683                         ERROR(image->error_str);
 684                         return retval;
 685                 }
 686
 687                 if ((retval = image_ihex_buffer_complete(image)) != ERROR_OK)
 688                 {
 689                         snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
 690                                 "failed buffering IHEX image, check daemon output for additional information");
 691                         ERROR(image->error_str);
 692                         fileio_close(&image_ihex->fileio);
 693                         return retval;
 694                 }
 695         }
 696         else if (image->type == IMAGE_ELF)
 697         {
 698                 image_elf_t *image_elf;
 699
 700                 image_elf = image->type_private = malloc(sizeof(image_elf_t));
 701
 702                 if ((retval = fileio_open(&image_elf->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
 703                 {
 704                         strncpy(image->error_str, image_elf->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 705                         ERROR(image->error_str);
 706                         return retval;
 707                 }
 708
 709                 if ((retval = image_elf_read_headers(image)) != ERROR_OK)
 710                 {
 711                         snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
 712                                 "failed to read ELF headers, check daemon output for additional information");
 713                         ERROR(image->error_str);
 714                         fileio_close(&image_elf->fileio);
 715                         return retval;
 716                 }
 717         }
 718         else if (image->type == IMAGE_MEMORY)
 719         {
 720                 image_memory_t *image_memory;
 721
 722                 image->num_sections = 1;
 723                 image->sections = malloc(sizeof(image_section_t));
 724                 image->sections[0].base_address = 0x0;
 725                 image->sections[0].size = 0xffffffff;
 726                 image->sections[0].flags = 0;
 727
 728                 image_memory = image->type_private = malloc(sizeof(image_memory_t));
 729
 730                 image_memory->target = get_target_by_num(strtoul(url, NULL, 0));;
 731                 image_memory->cache = NULL;
 732                 image_memory->cache_address = 0x0;
 733         }
 734         else if (image->type == IMAGE_SRECORD)
 735         {
 736                 image_mot_t *image_mot;
 737
 738                 image_mot = image->type_private = malloc(sizeof(image_mot_t));
 739
 740                 if ((retval = fileio_open(&image_mot->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
 741                 {
 742                         strncpy(image->error_str, image_mot->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 743                         ERROR(image->error_str);
 744                         return retval;
 745                 }
 746
 747                 if ((retval = image_mot_buffer_complete(image)) != ERROR_OK)
 748                 {
 749                         snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
 750                                 "failed buffering S19 image, check daemon output for additional information");
 751                         ERROR(image->error_str);
 752                         fileio_close(&image_mot->fileio);
 753                         return retval;
 754                 }
 755         }
 756         else if (image->type == IMAGE_BUILDER)
 757         {
 758                 image->num_sections = 0;
 759                 image->sections = NULL;
 760                 image->type_private = NULL;
 761         }
 762
 763         if (image->base_address_set)
 764         {
 765                 // relocate
 766                 int section;
 767                 for (section=0; section < image->num_sections; section++)
 768                 {
 769                         image->sections[section].base_address+=image->base_address;
 770                 }
 771                 // we're done relocating. The two statements below are mainly
 772                 // for documenation purposes: stop anyone from empirically
 773                 // thinking they should use these values henceforth.
 774                 image->base_address=0;
 775                 image->base_address_set=0;
 776         }
 777
 778         return retval;
 779 };
 780
 781 int image_read_section(image_t *image, int section, u32 offset, u32 size, u8 *buffer, u32 *size_read)
 782 {
 783         int retval;
 784
 785         /* don't read past the end of a section */
 786         if (offset + size > image->sections[section].size)
 787         {
 788                 DEBUG("read past end of section: 0x%8.8x + 0x%8.8x > 0x%8.8x",
 789                                 offset, size, image->sections[section].size);
 790                 return ERROR_INVALID_ARGUMENTS;
 791         }
 792
 793         if (image->type == IMAGE_BINARY)
 794         {
 795                 image_binary_t *image_binary = image->type_private;
 796
 797                 /* only one section in a plain binary */
 798                 if (section != 0)
 799                         return ERROR_INVALID_ARGUMENTS;
 800
 801                 /* seek to offset */
 802                 if ((retval = fileio_seek(&image_binary->fileio, offset)) != ERROR_OK)
 803                 {
 804                         strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 805                         return retval;
 806                 }
 807
 808                 /* return requested bytes */
 809                 if ((retval = fileio_read(&image_binary->fileio, size, buffer, size_read)) != ERROR_OK)
 810                 {
 811                         strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 812                         return retval;
 813                 }
 814         }
 815         else if (image->type == IMAGE_IHEX)
 816         {
 817                 memcpy(buffer, (u8*)image->sections[section].private + offset, size);
 818                 *size_read = size;
 819                 image->error_str[0] = '\0';
 820
 821                 return ERROR_OK;
 822         }
 823         else if (image->type == IMAGE_ELF)
 824         {
 825                 return image_elf_read_section(image, section, offset, size, buffer, size_read);
 826         }
 827         else if (image->type == IMAGE_MEMORY)
 828         {
 829                 image_memory_t *image_memory = image->type_private;
 830                 u32 address = image->sections[section].base_address + offset;
 831
 832                 *size_read = 0;
 833
 834                 while ((size - *size_read) > 0)
 835                 {
 836                         u32 size_in_cache;
 837
 838                         if (!image_memory->cache
 839                                 || (address < image_memory->cache_address)
 840                                 || (address >= (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE)))
 841                         {
 842                                 if (!image_memory->cache)
 843                                         image_memory->cache = malloc(IMAGE_MEMORY_CACHE_SIZE);
 844
 845                                 if (target_read_buffer(image_memory->target, address & ~(IMAGE_MEMORY_CACHE_SIZE - 1),
 846                                         IMAGE_MEMORY_CACHE_SIZE, image_memory->cache) != ERROR_OK)
 847                                 {
 848                                         free(image_memory->cache);
 849                                         image_memory->cache = NULL;
 850                                         return ERROR_IMAGE_TEMPORARILY_UNAVAILABLE;
 851                                 }
 852                                 image_memory->cache_address = address & ~(IMAGE_MEMORY_CACHE_SIZE - 1);
 853                         }
 854
 855                         size_in_cache = (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE) - address;
 856
 857                         memcpy(buffer + *size_read,
 858                                 image_memory->cache + (address - image_memory->cache_address),
 859                                 (size_in_cache > size) ? size : size_in_cache
 860                                 );
 861
 862                         *size_read += (size_in_cache > size) ? size : size_in_cache;
 863                         address += (size_in_cache > size) ? size : size_in_cache;
 864                 }
 865         }
 866         else if (image->type == IMAGE_SRECORD)
 867         {
 868                 memcpy(buffer, (u8*)image->sections[section].private + offset, size);
 869                 *size_read = size;
 870                 image->error_str[0] = '\0';
 871
 872                 return ERROR_OK;
 873         }
 874         else if (image->type == IMAGE_BUILDER)
 875         {
 876                 memcpy(buffer, (u8*)image->sections[section].private + offset, size);
 877                 *size_read = size;
 878                 image->error_str[0] = '\0';
 879
 880                 return ERROR_OK;
 881         }
 882
 883         return ERROR_OK;
 884 }
 885
 886 int image_add_section(image_t *image, u32 base, u32 size, int flags, u8 *data)
 887 {
 888         image_section_t *section;
 889
 890         /* only image builder supports adding sections */
 891         if (image->type != IMAGE_BUILDER)
 892                 return ERROR_INVALID_ARGUMENTS;
 893
 894         /* see if there's a previous section */
 895         if (image->num_sections)
 896         {
 897                 section = &image->sections[image->num_sections - 1];
 898
 899                 /* see if it's enough to extend the last section,
 900                  * adding data to previous sections or merging is not supported */
 901                 if (((section->base_address + section->size) == base) && (section->flags == flags))
 902                 {
 903                         section->private = realloc(section->private, section->size + size);
 904                         memcpy((u8*)section->private + section->size, data, size);
 905                         section->size += size;
 906                         return ERROR_OK;
 907                 }
 908         }
 909
 910         /* allocate new section */
 911         image->num_sections++;
 912         image->sections = realloc(image->sections, sizeof(image_section_t) * image->num_sections);
 913         section = &image->sections[image->num_sections - 1];
 914         section->base_address = base;
 915         section->size = size;
 916         section->flags = flags;
 917         section->private = malloc(sizeof(u8) * size);
 918         memcpy((u8*)section->private, data, size);
 919
 920         return ERROR_OK;
 921 }
 922
 923 int image_close(image_t *image)
 924 {
 925         if (image->type == IMAGE_BINARY)
 926         {
 927                 image_binary_t *image_binary = image->type_private;
 928
 929                 fileio_close(&image_binary->fileio);
 930         }
 931         else if (image->type == IMAGE_IHEX)
 932         {
 933                 image_ihex_t *image_ihex = image->type_private;
 934
 935                 fileio_close(&image_ihex->fileio);
 936
 937                 if (image_ihex->buffer)
 938                 {
 939                         free(image_ihex->buffer);
 940                         image_ihex->buffer = NULL;
 941                 }
 942         }
 943         else if (image->type == IMAGE_ELF)
 944         {
 945                 image_elf_t *image_elf = image->type_private;
 946
 947                 fileio_close(&image_elf->fileio);
 948
 949                 if (image_elf->header)
 950                 {
 951                         free(image_elf->header);
 952                         image_elf->header = NULL;
 953                 }
 954
 955                 if (image_elf->segments)
 956                 {
 957                         free(image_elf->segments);
 958                         image_elf->segments = NULL;
 959                 }
 960         }
 961         else if (image->type == IMAGE_MEMORY)
 962         {
 963                 image_memory_t *image_memory = image->type_private;
 964
 965                 if (image_memory->cache)
 966                 {
 967                         free(image_memory->cache);
 968                         image_memory->cache = NULL;
 969                 }
 970         }
 971         else if (image->type == IMAGE_SRECORD)
 972         {
 973                 image_mot_t *image_mot = image->type_private;
 974
 975                 fileio_close(&image_mot->fileio);
 976
 977                 if (image_mot->buffer)
 978                 {
 979                         free(image_mot->buffer);
 980                         image_mot->buffer = NULL;
 981                 }
 982         }
 983         else if (image->type == IMAGE_BUILDER)
 984         {
 985                 int i;
 986
 987                 for (i = 0; i < image->num_sections; i++)
 988                 {
 989                         free(image->sections[i].private);
 990                         image->sections[i].private = NULL;
 991                 }
 992         }
 993
 994         if (image->type_private)
 995         {
 996                 free(image->type_private);
 997                 image->type_private = NULL;
 998         }
 999
1000         if (image->sections)
1001         {
1002                 free(image->sections);
1003                 image->sections = NULL;
1004         }
1005
1006         return ERROR_OK;
1007 }
1008
1009 static u32 crc32_table[256] = {0, 0};
1010
1011 int image_calculate_checksum(u8* buffer, u32 nbytes, u32* checksum)
1012 {
1013         u32 crc = 0xffffffff;
1014
1015         if (!crc32_table[1])
1016         {
1017                 /* Initialize the CRC table and the decoding table.  */
1018                 int i, j;
1019                 unsigned int c;
1020                 for (i = 0; i < 256; i++)
1021                 {
1022                         /* as per gdb */
1023                         for (c = i << 24, j = 8; j > 0; --j)
1024                                 c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
1025                         crc32_table[i] = c;
1026                 }
1027         }
1028
1029         while (nbytes--)
1030         {
1031                 /* as per gdb */
1032                 crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buffer++) & 255];
1033         }
1034
1035         *checksum = crc;
1036         return ERROR_OK;
1037 }
1038
1039