|
- /***************************************************************************
- * Copyright (C) 2007 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include <stdlib.h>
- #include <string.h>
- #ifdef HAVE_ELF_H
- #include <elf.h>
- #endif
-
- #include "image.h"
-
- #include "types.h"
- #include "replacements.h"
- #include "log.h"
-
- #include "fileio.h"
- #include "target.h"
-
- /* convert ELF header field to host endianness */
- #define field16(elf,field)\
- ((elf->endianness==ELFDATA2LSB)? \
- le_to_h_u16((u8*)&field):be_to_h_u16((u8*)&field))
-
- #define field32(elf,field)\
- ((elf->endianness==ELFDATA2LSB)? \
- le_to_h_u32((u8*)&field):be_to_h_u32((u8*)&field))
-
- static int autodetect_image_type(image_t *image, char *url)
- {
- int retval;
- fileio_t fileio;
- u32 read_bytes;
- u8 buffer[9];
-
- /* read the first 4 bytes of image */
- if ((retval = fileio_open(&fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
- {
- return retval;
- }
- retval = fileio_read(&fileio, 9, buffer, &read_bytes);
-
- if (retval==ERROR_OK)
- {
- if (read_bytes != 9)
- {
- retval=ERROR_FILEIO_OPERATION_FAILED;
- }
- }
- fileio_close(&fileio);
-
- if (retval!=ERROR_OK)
- return retval;
-
- /* check header against known signatures */
- if (strncmp((char*)buffer,ELFMAG,SELFMAG)==0)
- {
- LOG_DEBUG("ELF image detected.");
- image->type = IMAGE_ELF;
- }
- else if ((buffer[0]==':') /* record start byte */
- &&(isxdigit(buffer[1]))
- &&(isxdigit(buffer[2]))
- &&(isxdigit(buffer[3]))
- &&(isxdigit(buffer[4]))
- &&(isxdigit(buffer[5]))
- &&(isxdigit(buffer[6]))
- &&(buffer[7]=='0') /* record type : 00 -> 05 */
- &&(buffer[8]>='0')&&(buffer[8]<'6'))
- {
- LOG_DEBUG("IHEX image detected.");
- image->type = IMAGE_IHEX;
- }
- else if ((buffer[0] == 'S') /* record start byte */
- &&(isxdigit(buffer[1]))
- &&(isxdigit(buffer[2]))
- &&(isxdigit(buffer[3]))
- &&(buffer[1] >= '0') && (buffer[1] < '9'))
- {
- LOG_DEBUG("S19 image detected.");
- image->type = IMAGE_SRECORD;
- }
- else
- {
- image->type = IMAGE_BINARY;
- }
-
- return ERROR_OK;
- }
-
- int identify_image_type(image_t *image, char *type_string, char *url)
- {
- if (type_string)
- {
- if (!strcmp(type_string, "bin"))
- {
- image->type = IMAGE_BINARY;
- }
- else if (!strcmp(type_string, "ihex"))
- {
- image->type = IMAGE_IHEX;
- }
- else if (!strcmp(type_string, "elf"))
- {
- image->type = IMAGE_ELF;
- }
- else if (!strcmp(type_string, "mem"))
- {
- image->type = IMAGE_MEMORY;
- }
- else if (!strcmp(type_string, "s19"))
- {
- image->type = IMAGE_SRECORD;
- }
- else if (!strcmp(type_string, "build"))
- {
- image->type = IMAGE_BUILDER;
- }
- else
- {
- return ERROR_IMAGE_TYPE_UNKNOWN;
- }
- }
- else
- {
- return autodetect_image_type(image, url);
- }
-
- return ERROR_OK;
- }
-
- int image_ihex_buffer_complete(image_t *image)
- {
- image_ihex_t *ihex = image->type_private;
- fileio_t *fileio = &ihex->fileio;
- u32 full_address = 0x0;
- u32 cooked_bytes;
- int i;
- char lpszLine[1023];
-
- /* we can't determine the number of sections that we'll have to create ahead of time,
- * so we locally hold them until parsing is finished */
- image_section_t section[IMAGE_MAX_SECTIONS];
-
- ihex->buffer = malloc(fileio->size >> 1);
- cooked_bytes = 0x0;
- image->num_sections = 0;
- section[image->num_sections].private = &ihex->buffer[cooked_bytes];
- section[image->num_sections].base_address = 0x0;
- section[image->num_sections].size = 0x0;
- section[image->num_sections].flags = 0;
-
- while (fileio_fgets(fileio, 1023, lpszLine) == ERROR_OK)
- {
- u32 count;
- u32 address;
- u32 record_type;
- u32 checksum;
- u8 cal_checksum = 0;
- u32 bytes_read = 0;
-
- if (sscanf(&lpszLine[bytes_read], ":%2x%4x%2x", &count, &address, &record_type) != 3)
- {
- return ERROR_IMAGE_FORMAT_ERROR;
- }
- bytes_read += 9;
-
- cal_checksum += (u8)count;
- cal_checksum += (u8)(address >> 8);
- cal_checksum += (u8)address;
- cal_checksum += (u8)record_type;
-
- if (record_type == 0) /* Data Record */
- {
- if ((full_address & 0xffff) != address)
- {
- /* we encountered a nonconsecutive location, create a new section,
- * unless the current section has zero size, in which case this specifies
- * the current section's base address
- */
- if (section[image->num_sections].size != 0)
- {
- image->num_sections++;
- section[image->num_sections].size = 0x0;
- section[image->num_sections].flags = 0;
- section[image->num_sections].private = &ihex->buffer[cooked_bytes];
- }
- section[image->num_sections].base_address =
- (full_address & 0xffff0000) | address;
- full_address = (full_address & 0xffff0000) | address;
- }
-
- while (count-- > 0)
- {
- sscanf(&lpszLine[bytes_read], "%2x", (u32*)&ihex->buffer[cooked_bytes]);
- cal_checksum += (u8)ihex->buffer[cooked_bytes];
- bytes_read += 2;
- cooked_bytes += 1;
- section[image->num_sections].size += 1;
- full_address++;
- }
- }
- else if (record_type == 1) /* End of File Record */
- {
- /* finish the current section */
- image->num_sections++;
-
- /* copy section information */
- image->sections = malloc(sizeof(image_section_t) * image->num_sections);
- for (i = 0; i < image->num_sections; i++)
- {
- image->sections[i].private = section[i].private;
- image->sections[i].base_address = section[i].base_address;
- image->sections[i].size = section[i].size;
- image->sections[i].flags = section[i].flags;
- }
-
- return ERROR_OK;
- }
- else if (record_type == 2) /* Linear Address Record */
- {
- u16 upper_address;
-
- sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
- cal_checksum += (u8)(upper_address >> 8);
- cal_checksum += (u8)upper_address;
- bytes_read += 4;
-
- if ((full_address >> 4) != upper_address)
- {
- /* we encountered a nonconsecutive location, create a new section,
- * unless the current section has zero size, in which case this specifies
- * the current section's base address
- */
- if (section[image->num_sections].size != 0)
- {
- image->num_sections++;
- section[image->num_sections].size = 0x0;
- section[image->num_sections].flags = 0;
- section[image->num_sections].private = &ihex->buffer[cooked_bytes];
- }
- section[image->num_sections].base_address =
- (full_address & 0xffff) | (upper_address << 4);
- full_address = (full_address & 0xffff) | (upper_address << 4);
- }
- }
- else if (record_type == 3) /* Start Segment Address Record */
- {
- u32 dummy;
-
- /* "Start Segment Address Record" will not be supported */
- /* but we must consume it, and do not create an error. */
- while (count-- > 0)
- {
- sscanf(&lpszLine[bytes_read], "%2x", &dummy);
- cal_checksum += (u8)dummy;
- bytes_read += 2;
- }
- }
- else if (record_type == 4) /* Extended Linear Address Record */
- {
- u16 upper_address;
-
- sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
- cal_checksum += (u8)(upper_address >> 8);
- cal_checksum += (u8)upper_address;
- bytes_read += 4;
-
- if ((full_address >> 16) != upper_address)
- {
- /* we encountered a nonconsecutive location, create a new section,
- * unless the current section has zero size, in which case this specifies
- * the current section's base address
- */
- if (section[image->num_sections].size != 0)
- {
- image->num_sections++;
- section[image->num_sections].size = 0x0;
- section[image->num_sections].flags = 0;
- section[image->num_sections].private = &ihex->buffer[cooked_bytes];
- }
- section[image->num_sections].base_address =
- (full_address & 0xffff) | (upper_address << 16);
- full_address = (full_address & 0xffff) | (upper_address << 16);
- }
- }
- else if (record_type == 5) /* Start Linear Address Record */
- {
- u32 start_address;
-
- sscanf(&lpszLine[bytes_read], "%8x", &start_address);
- cal_checksum += (u8)(start_address >> 24);
- cal_checksum += (u8)(start_address >> 16);
- cal_checksum += (u8)(start_address >> 8);
- cal_checksum += (u8)start_address;
- bytes_read += 8;
-
- image->start_address_set = 1;
- image->start_address = be_to_h_u32((u8*)&start_address);
- }
- else
- {
- LOG_ERROR("unhandled IHEX record type: %i", record_type);
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
- sscanf(&lpszLine[bytes_read], "%2x", &checksum);
- bytes_read += 2;
-
- if ((u8)checksum != (u8)(~cal_checksum + 1))
- {
- /* checksum failed */
- LOG_ERROR("incorrect record checksum found in IHEX file");
- return ERROR_IMAGE_CHECKSUM;
- }
- }
-
- LOG_ERROR("premature end of IHEX file, no end-of-file record found");
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
- int image_elf_read_headers(image_t *image)
- {
- image_elf_t *elf = image->type_private;
- u32 read_bytes;
- u32 i,j;
- int retval;
-
- elf->header = malloc(sizeof(Elf32_Ehdr));
-
- if ((retval = fileio_read(&elf->fileio, sizeof(Elf32_Ehdr), (u8*)elf->header, &read_bytes)) != ERROR_OK)
- {
- LOG_ERROR("cannot read ELF file header, read failed");
- return ERROR_FILEIO_OPERATION_FAILED;
- }
- if (read_bytes != sizeof(Elf32_Ehdr))
- {
- LOG_ERROR("cannot read ELF file header, only partially read");
- return ERROR_FILEIO_OPERATION_FAILED;
- }
-
- if (strncmp((char*)elf->header->e_ident,ELFMAG,SELFMAG)!=0)
- {
- LOG_ERROR("invalid ELF file, bad magic number");
- return ERROR_IMAGE_FORMAT_ERROR;
- }
- if (elf->header->e_ident[EI_CLASS]!=ELFCLASS32)
- {
- LOG_ERROR("invalid ELF file, only 32bits files are supported");
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
-
- elf->endianness = elf->header->e_ident[EI_DATA];
- if ((elf->endianness!=ELFDATA2LSB)
- &&(elf->endianness!=ELFDATA2MSB))
- {
- LOG_ERROR("invalid ELF file, unknown endianess setting");
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
- elf->segment_count = field16(elf,elf->header->e_phnum);
- if (elf->segment_count==0)
- {
- LOG_ERROR("invalid ELF file, no program headers");
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
- if ((retval = fileio_seek(&elf->fileio, field32(elf,elf->header->e_phoff))) != ERROR_OK)
- {
- LOG_ERROR("cannot seek to ELF program header table, read failed");
- return retval;
- }
-
- elf->segments = malloc(elf->segment_count*sizeof(Elf32_Phdr));
-
- if ((retval = fileio_read(&elf->fileio, elf->segment_count*sizeof(Elf32_Phdr), (u8*)elf->segments, &read_bytes)) != ERROR_OK)
- {
- LOG_ERROR("cannot read ELF segment headers, read failed");
- return retval;
- }
- if (read_bytes != elf->segment_count*sizeof(Elf32_Phdr))
- {
- LOG_ERROR("cannot read ELF segment headers, only partially read");
- return ERROR_FILEIO_OPERATION_FAILED;
- }
-
- /* count useful segments (loadable), ignore BSS section */
- image->num_sections = 0;
- for (i=0;i<elf->segment_count;i++)
- if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_filesz) != 0))
- image->num_sections++;
- /* alloc and fill sections array with loadable segments */
- image->sections = malloc(image->num_sections * sizeof(image_section_t));
- for (i=0,j=0;i<elf->segment_count;i++)
- {
- if ((field32(elf, elf->segments[i].p_type) == PT_LOAD) && (field32(elf, elf->segments[i].p_filesz) != 0))
- {
- image->sections[j].size = field32(elf,elf->segments[i].p_filesz);
- image->sections[j].base_address = field32(elf,elf->segments[i].p_paddr);
- image->sections[j].private = &elf->segments[i];
- image->sections[j].flags = field32(elf,elf->segments[i].p_flags);
- j++;
- }
- }
-
- image->start_address_set = 1;
- image->start_address = field32(elf,elf->header->e_entry);
-
- return ERROR_OK;
- }
-
- int image_elf_read_section(image_t *image, int section, u32 offset, u32 size, u8 *buffer, u32 *size_read)
- {
- image_elf_t *elf = image->type_private;
- Elf32_Phdr *segment = (Elf32_Phdr *)image->sections[section].private;
- u32 read_size,really_read;
- int retval;
-
- *size_read = 0;
-
- LOG_DEBUG("load segment %d at 0x%x (sz=0x%x)",section,offset,size);
-
- /* read initialized data in current segment if any */
- if (offset<field32(elf,segment->p_filesz))
- {
- /* maximal size present in file for the current segment */
- read_size = MIN(size, field32(elf,segment->p_filesz)-offset);
- LOG_DEBUG("read elf: size = 0x%x at 0x%x",read_size,
- field32(elf,segment->p_offset)+offset);
- /* read initialized area of the segment */
- if ((retval = fileio_seek(&elf->fileio, field32(elf,segment->p_offset)+offset)) != ERROR_OK)
- {
- LOG_ERROR("cannot find ELF segment content, seek failed");
- return retval;
- }
- if ((retval = fileio_read(&elf->fileio, read_size, buffer, &really_read)) != ERROR_OK)
- {
- LOG_ERROR("cannot read ELF segment content, read failed");
- return retval;
- }
- buffer += read_size;
- size -= read_size;
- offset += read_size;
- *size_read += read_size;
- /* need more data ? */
- if (!size)
- return ERROR_OK;
- }
-
- return ERROR_OK;
- }
-
- int image_mot_buffer_complete(image_t *image)
- {
- image_mot_t *mot = image->type_private;
- fileio_t *fileio = &mot->fileio;
- u32 full_address = 0x0;
- u32 cooked_bytes;
- int i;
- char lpszLine[1023];
-
- /* we can't determine the number of sections that we'll have to create ahead of time,
- * so we locally hold them until parsing is finished */
- image_section_t section[IMAGE_MAX_SECTIONS];
-
- mot->buffer = malloc(fileio->size >> 1);
- cooked_bytes = 0x0;
- image->num_sections = 0;
- section[image->num_sections].private = &mot->buffer[cooked_bytes];
- section[image->num_sections].base_address = 0x0;
- section[image->num_sections].size = 0x0;
- section[image->num_sections].flags = 0;
-
- while (fileio_fgets(fileio, 1023, lpszLine) == ERROR_OK)
- {
- u32 count;
- u32 address;
- u32 record_type;
- u32 checksum;
- u8 cal_checksum = 0;
- u32 bytes_read = 0;
-
- /* get record type and record length */
- if (sscanf(&lpszLine[bytes_read], "S%1x%2x", &record_type, &count) != 2)
- {
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
- bytes_read += 4;
- cal_checksum += (u8)count;
-
- /* skip checksum byte */
- count -=1;
-
- if (record_type == 0)
- {
- /* S0 - starting record (optional) */
- int iValue;
-
- while (count-- > 0) {
- sscanf(&lpszLine[bytes_read], "%2x", &iValue);
- cal_checksum += (u8)iValue;
- bytes_read += 2;
- }
- }
- else if (record_type >= 1 && record_type <= 3)
- {
- switch( record_type )
- {
- case 1:
- /* S1 - 16 bit address data record */
- sscanf(&lpszLine[bytes_read], "%4x", &address);
- cal_checksum += (u8)(address >> 8);
- cal_checksum += (u8)address;
- bytes_read += 4;
- count -=2;
- break;
-
- case 2:
- /* S2 - 24 bit address data record */
- sscanf(&lpszLine[bytes_read], "%6x", &address);
- cal_checksum += (u8)(address >> 16);
- cal_checksum += (u8)(address >> 8);
- cal_checksum += (u8)address;
- bytes_read += 6;
- count -=3;
- break;
-
- case 3:
- /* S3 - 32 bit address data record */
- sscanf(&lpszLine[bytes_read], "%8x", &address);
- cal_checksum += (u8)(address >> 24);
- cal_checksum += (u8)(address >> 16);
- cal_checksum += (u8)(address >> 8);
- cal_checksum += (u8)address;
- bytes_read += 8;
- count -=4;
- break;
-
- }
-
- if (full_address != address)
- {
- /* we encountered a nonconsecutive location, create a new section,
- * unless the current section has zero size, in which case this specifies
- * the current section's base address
- */
- if (section[image->num_sections].size != 0)
- {
- image->num_sections++;
- section[image->num_sections].size = 0x0;
- section[image->num_sections].flags = 0;
- section[image->num_sections].private = &mot->buffer[cooked_bytes];
- }
- section[image->num_sections].base_address = address;
- full_address = address;
- }
-
- while (count-- > 0)
- {
- sscanf(&lpszLine[bytes_read], "%2x", (u32*)&mot->buffer[cooked_bytes]);
- cal_checksum += (u8)mot->buffer[cooked_bytes];
- bytes_read += 2;
- cooked_bytes += 1;
- section[image->num_sections].size += 1;
- full_address++;
- }
- }
- else if (record_type == 5)
- {
- /* S5 is the data count record, we ignore it */
- u32 dummy;
-
- while (count-- > 0)
- {
- sscanf(&lpszLine[bytes_read], "%2x", &dummy);
- cal_checksum += (u8)dummy;
- bytes_read += 2;
- }
- }
- else if (record_type >= 7 && record_type <= 9)
- {
- /* S7, S8, S9 - ending records for 32, 24 and 16bit */
- image->num_sections++;
-
- /* copy section information */
- image->sections = malloc(sizeof(image_section_t) * image->num_sections);
- for (i = 0; i < image->num_sections; i++)
- {
- image->sections[i].private = section[i].private;
- image->sections[i].base_address = section[i].base_address;
- image->sections[i].size = section[i].size;
- image->sections[i].flags = section[i].flags;
- }
-
- return ERROR_OK;
- }
- else
- {
- LOG_ERROR("unhandled S19 record type: %i", record_type);
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
- /* account for checksum, will always be 0xFF */
- sscanf(&lpszLine[bytes_read], "%2x", &checksum);
- cal_checksum += (u8)checksum;
- bytes_read += 2;
-
- if( cal_checksum != 0xFF )
- {
- /* checksum failed */
- LOG_ERROR("incorrect record checksum found in S19 file");
- return ERROR_IMAGE_CHECKSUM;
- }
- }
-
- LOG_ERROR("premature end of S19 file, no end-of-file record found");
- return ERROR_IMAGE_FORMAT_ERROR;
- }
-
- int image_open(image_t *image, char *url, char *type_string)
- {
- int retval = ERROR_OK;
-
- if ((retval = identify_image_type(image, type_string, url)) != ERROR_OK)
- {
- return retval;
- }
-
- if (image->type == IMAGE_BINARY)
- {
- image_binary_t *image_binary;
-
- image_binary = image->type_private = malloc(sizeof(image_binary_t));
-
- if ((retval = fileio_open(&image_binary->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
- {
- return retval;
- }
-
- image->num_sections = 1;
- image->sections = malloc(sizeof(image_section_t));
- image->sections[0].base_address = 0x0;
- image->sections[0].size = image_binary->fileio.size;
- image->sections[0].flags = 0;
- }
- else if (image->type == IMAGE_IHEX)
- {
- image_ihex_t *image_ihex;
-
- image_ihex = image->type_private = malloc(sizeof(image_ihex_t));
-
- if ((retval = fileio_open(&image_ihex->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
- {
- return retval;
- }
-
- if ((retval = image_ihex_buffer_complete(image)) != ERROR_OK)
- {
- LOG_ERROR("failed buffering IHEX image, check daemon output for additional information");
- fileio_close(&image_ihex->fileio);
- return retval;
- }
- }
- else if (image->type == IMAGE_ELF)
- {
- image_elf_t *image_elf;
-
- image_elf = image->type_private = malloc(sizeof(image_elf_t));
-
- if ((retval = fileio_open(&image_elf->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
- {
- return retval;
- }
-
- if ((retval = image_elf_read_headers(image)) != ERROR_OK)
- {
- fileio_close(&image_elf->fileio);
- return retval;
- }
- }
- else if (image->type == IMAGE_MEMORY)
- {
- image_memory_t *image_memory;
-
- image->num_sections = 1;
- image->sections = malloc(sizeof(image_section_t));
- image->sections[0].base_address = 0x0;
- image->sections[0].size = 0xffffffff;
- image->sections[0].flags = 0;
-
- image_memory = image->type_private = malloc(sizeof(image_memory_t));
-
- image_memory->target = get_target_by_num(strtoul(url, NULL, 0));;
- image_memory->cache = NULL;
- image_memory->cache_address = 0x0;
- }
- else if (image->type == IMAGE_SRECORD)
- {
- image_mot_t *image_mot;
-
- image_mot = image->type_private = malloc(sizeof(image_mot_t));
-
- if ((retval = fileio_open(&image_mot->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
- {
- return retval;
- }
-
- if ((retval = image_mot_buffer_complete(image)) != ERROR_OK)
- {
- LOG_ERROR("failed buffering S19 image, check daemon output for additional information");
- fileio_close(&image_mot->fileio);
- return retval;
- }
- }
- else if (image->type == IMAGE_BUILDER)
- {
- image->num_sections = 0;
- image->sections = NULL;
- image->type_private = NULL;
- }
-
- if (image->base_address_set)
- {
- /* relocate */
- int section;
- for (section=0; section < image->num_sections; section++)
- {
- image->sections[section].base_address+=image->base_address;
- }
- /* we're done relocating. The two statements below are mainly
- * for documenation purposes: stop anyone from empirically
- * thinking they should use these values henceforth. */
- image->base_address=0;
- image->base_address_set=0;
- }
-
- return retval;
- };
-
- int image_read_section(image_t *image, int section, u32 offset, u32 size, u8 *buffer, u32 *size_read)
- {
- int retval;
-
- /* don't read past the end of a section */
- if (offset + size > image->sections[section].size)
- {
- LOG_DEBUG("read past end of section: 0x%8.8x + 0x%8.8x > 0x%8.8x",
- offset, size, image->sections[section].size);
- return ERROR_INVALID_ARGUMENTS;
- }
-
- if (image->type == IMAGE_BINARY)
- {
- image_binary_t *image_binary = image->type_private;
-
- /* only one section in a plain binary */
- if (section != 0)
- return ERROR_INVALID_ARGUMENTS;
-
- /* seek to offset */
- if ((retval = fileio_seek(&image_binary->fileio, offset)) != ERROR_OK)
- {
- return retval;
- }
-
- /* return requested bytes */
- if ((retval = fileio_read(&image_binary->fileio, size, buffer, size_read)) != ERROR_OK)
- {
- return retval;
- }
- }
- else if (image->type == IMAGE_IHEX)
- {
- memcpy(buffer, (u8*)image->sections[section].private + offset, size);
- *size_read = size;
-
- return ERROR_OK;
- }
- else if (image->type == IMAGE_ELF)
- {
- return image_elf_read_section(image, section, offset, size, buffer, size_read);
- }
- else if (image->type == IMAGE_MEMORY)
- {
- image_memory_t *image_memory = image->type_private;
- u32 address = image->sections[section].base_address + offset;
-
- *size_read = 0;
-
- while ((size - *size_read) > 0)
- {
- u32 size_in_cache;
-
- if (!image_memory->cache
- || (address < image_memory->cache_address)
- || (address >= (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE)))
- {
- if (!image_memory->cache)
- image_memory->cache = malloc(IMAGE_MEMORY_CACHE_SIZE);
-
- if (target_read_buffer(image_memory->target, address & ~(IMAGE_MEMORY_CACHE_SIZE - 1),
- IMAGE_MEMORY_CACHE_SIZE, image_memory->cache) != ERROR_OK)
- {
- free(image_memory->cache);
- image_memory->cache = NULL;
- return ERROR_IMAGE_TEMPORARILY_UNAVAILABLE;
- }
- image_memory->cache_address = address & ~(IMAGE_MEMORY_CACHE_SIZE - 1);
- }
-
- size_in_cache = (image_memory->cache_address + IMAGE_MEMORY_CACHE_SIZE) - address;
-
- memcpy(buffer + *size_read,
- image_memory->cache + (address - image_memory->cache_address),
- (size_in_cache > size) ? size : size_in_cache
- );
-
- *size_read += (size_in_cache > size) ? size : size_in_cache;
- address += (size_in_cache > size) ? size : size_in_cache;
- }
- }
- else if (image->type == IMAGE_SRECORD)
- {
- memcpy(buffer, (u8*)image->sections[section].private + offset, size);
- *size_read = size;
-
- return ERROR_OK;
- }
- else if (image->type == IMAGE_BUILDER)
- {
- memcpy(buffer, (u8*)image->sections[section].private + offset, size);
- *size_read = size;
-
- return ERROR_OK;
- }
-
- return ERROR_OK;
- }
-
- int image_add_section(image_t *image, u32 base, u32 size, int flags, u8 *data)
- {
- image_section_t *section;
-
- /* only image builder supports adding sections */
- if (image->type != IMAGE_BUILDER)
- return ERROR_INVALID_ARGUMENTS;
-
- /* see if there's a previous section */
- if (image->num_sections)
- {
- section = &image->sections[image->num_sections - 1];
-
- /* see if it's enough to extend the last section,
- * adding data to previous sections or merging is not supported */
- if (((section->base_address + section->size) == base) && (section->flags == flags))
- {
- section->private = realloc(section->private, section->size + size);
- memcpy((u8*)section->private + section->size, data, size);
- section->size += size;
- return ERROR_OK;
- }
- }
-
- /* allocate new section */
- image->num_sections++;
- image->sections = realloc(image->sections, sizeof(image_section_t) * image->num_sections);
- section = &image->sections[image->num_sections - 1];
- section->base_address = base;
- section->size = size;
- section->flags = flags;
- section->private = malloc(sizeof(u8) * size);
- memcpy((u8*)section->private, data, size);
-
- return ERROR_OK;
- }
-
- int image_close(image_t *image)
- {
- if (image->type == IMAGE_BINARY)
- {
- image_binary_t *image_binary = image->type_private;
-
- fileio_close(&image_binary->fileio);
- }
- else if (image->type == IMAGE_IHEX)
- {
- image_ihex_t *image_ihex = image->type_private;
-
- fileio_close(&image_ihex->fileio);
-
- if (image_ihex->buffer)
- {
- free(image_ihex->buffer);
- image_ihex->buffer = NULL;
- }
- }
- else if (image->type == IMAGE_ELF)
- {
- image_elf_t *image_elf = image->type_private;
-
- fileio_close(&image_elf->fileio);
-
- if (image_elf->header)
- {
- free(image_elf->header);
- image_elf->header = NULL;
- }
-
- if (image_elf->segments)
- {
- free(image_elf->segments);
- image_elf->segments = NULL;
- }
- }
- else if (image->type == IMAGE_MEMORY)
- {
- image_memory_t *image_memory = image->type_private;
-
- if (image_memory->cache)
- {
- free(image_memory->cache);
- image_memory->cache = NULL;
- }
- }
- else if (image->type == IMAGE_SRECORD)
- {
- image_mot_t *image_mot = image->type_private;
-
- fileio_close(&image_mot->fileio);
-
- if (image_mot->buffer)
- {
- free(image_mot->buffer);
- image_mot->buffer = NULL;
- }
- }
- else if (image->type == IMAGE_BUILDER)
- {
- int i;
-
- for (i = 0; i < image->num_sections; i++)
- {
- free(image->sections[i].private);
- image->sections[i].private = NULL;
- }
- }
-
- if (image->type_private)
- {
- free(image->type_private);
- image->type_private = NULL;
- }
-
- if (image->sections)
- {
- free(image->sections);
- image->sections = NULL;
- }
-
- return ERROR_OK;
- }
-
- static u32 crc32_table[256] = {0, 0};
-
- int image_calculate_checksum(u8* buffer, u32 nbytes, u32* checksum)
- {
- u32 crc = 0xffffffff;
-
- if (!crc32_table[1])
- {
- /* Initialize the CRC table and the decoding table. */
- int i, j;
- unsigned int c;
- for (i = 0; i < 256; i++)
- {
- /* as per gdb */
- for (c = i << 24, j = 8; j > 0; --j)
- c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
- crc32_table[i] = c;
- }
- }
-
- while (nbytes--)
- {
- /* as per gdb */
- crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buffer++) & 255];
- }
-
- *checksum = crc;
- return ERROR_OK;
- }
-
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