X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fimage.c;h=624f319e058b3f2c7f455ba12f88bd7eca687223;hp=3cc9cc5b1d928e4449b6ba7621e7ff43786f3f56;hb=db3d66f951428dfea526303850eb27b1dc092a55;hpb=cbefac0be0b1b633b8d34cf75839de67064e90e2

diff --git a/src/target/image.c b/src/target/image.c
index 3cc9cc5b1d..624f319e05 100644
--- a/src/target/image.c
+++ b/src/target/image.c
@@ -23,6 +23,9 @@
 
 #include <stdlib.h>
 #include <string.h>
+#ifdef HAVE_ELF_H
+#include <elf.h>
+#endif
 
 #include "image.h"
 
@@ -33,168 +36,644 @@
 #include "fileio.h"
 #include "target.h"
 
-int image_ihex_buffer_complete(image_t *image)
+/* 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)
 {
-	image_ihex_t *ihex = image->type_private;
-	fileio_t *fileio = &ihex->fileio;
-	u32 raw_bytes_read, raw_bytes;
 	int retval;
-	u32 full_address = image->base_address;
-	char *buffer = malloc(ihex->raw_size);
-	u32 cooked_bytes = 0x0;
-	
-	ihex->raw_size = fileio->size;
-	ihex->buffer = malloc(ihex->raw_size >> 1);
-	
-	if ((retval = fileio_read(fileio, ihex->raw_size, (u8*)buffer, &raw_bytes_read)) != ERROR_OK)
-	{
-		free(buffer);
-		ERROR("failed buffering IHEX file, read failed");
+	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)
+	{
+		snprintf(image->error_str, IMAGE_MAX_ERROR_STRING, "cannot open image: %s", fileio.error_str);
+		ERROR(image->error_str);
+		return retval;
+	}
+	if ((retval = fileio_read(&fileio, 9, buffer, &read_bytes)) != ERROR_OK)
+	{
+		snprintf(image->error_str, IMAGE_MAX_ERROR_STRING, "cannot read image header: %s", fileio.error_str);
+		ERROR(image->error_str);
 		return ERROR_FILEIO_OPERATION_FAILED;
 	}
-	
-	if (raw_bytes_read != ihex->raw_size)
+	if (read_bytes != 9)
 	{
-		free(buffer);
-		ERROR("failed buffering complete IHEX file, only partially read");
+		snprintf(image->error_str, IMAGE_MAX_ERROR_STRING, "cannot read image, only partially read");
+		ERROR(image->error_str);
 		return ERROR_FILEIO_OPERATION_FAILED;
 	}
-	
-	image->size = 0x0;
-	raw_bytes = 0x0;
-	while (raw_bytes < raw_bytes_read)
+	fileio_close(&fileio);
+
+	/* check header against known signatures */
+	if (strncmp((char*)buffer,ELFMAG,SELFMAG)==0)
+	{
+		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'))
+	{
+		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'))
+	{
+		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;
-		
-		if (sscanf(&buffer[raw_bytes], ":%2x%4x%2x", &count, &address, &record_type) != 3)
+		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;
 		}
-		raw_bytes += 9;
-		
-		if (record_type == 0)
+		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)
 			{
-				free(buffer);
-				ERROR("can't handle non-linear IHEX file");
-				return ERROR_IMAGE_FORMAT_ERROR;
+				/* 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(&buffer[raw_bytes], "%2hhx", &ihex->buffer[cooked_bytes]);
-				raw_bytes += 2;
+				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)
+		else if (record_type == 1) /* End of File Record */
 		{
-			free(buffer);
-			image->size = cooked_bytes;
+			/* 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 == 4)
+		else if (record_type == 2) /* Linear Address Record */
 		{
 			u16 upper_address;
-			
-			sscanf(&buffer[raw_bytes], "%4hx", &upper_address);
-			raw_bytes += 4;
-			
+
+			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)
 			{
-				free(buffer);
-				ERROR("can't handle non-linear IHEX file");
-				return ERROR_IMAGE_FORMAT_ERROR;
+				/* 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)
+		else if (record_type == 5) /* Start Linear Address Record */
 		{
 			u32 start_address;
-			
-			sscanf(&buffer[raw_bytes], "%8x", &start_address);
-			raw_bytes += 8;
-			
+
+			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
 		{
-			free(buffer);
 			ERROR("unhandled IHEX record type: %i", record_type);
 			return ERROR_IMAGE_FORMAT_ERROR;
 		}
-		
-		sscanf(&buffer[raw_bytes], "%2x", &checksum);
-		raw_bytes += 2;
-		
-		/* consume new-line character(s) */
-		if ((buffer[raw_bytes] == '\n') || (buffer[raw_bytes] == '\r'))
-			raw_bytes++;
 
-		if ((buffer[raw_bytes] == '\n') || (buffer[raw_bytes] == '\r'))
-			raw_bytes++;
+		sscanf(&lpszLine[bytes_read], "%2x", &checksum);
+		bytes_read += 2;
+
+		if ((u8)checksum != (u8)(~cal_checksum + 1))
+		{
+			/* checksum failed */
+			ERROR("incorrect record checksum found in IHEX file");
+			return ERROR_IMAGE_CHECKSUM;
+		}
 	}
 
-	free(buffer);
 	ERROR("premature end of IHEX file, no end-of-file record found");
 	return ERROR_IMAGE_FORMAT_ERROR;
 }
 
-int image_open(image_t *image, void *source, enum fileio_access access)
+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)
+	{
+		ERROR("cannot read ELF file header, read failed");
+		return ERROR_FILEIO_OPERATION_FAILED;
+	}
+	if (read_bytes != sizeof(Elf32_Ehdr))
+	{
+		ERROR("cannot read ELF file header, only partially read");
+		return ERROR_FILEIO_OPERATION_FAILED;
+	}
+
+	if (strncmp((char*)elf->header->e_ident,ELFMAG,SELFMAG) != 0)
+	{
+		ERROR("invalid ELF file, bad magic number");
+		return ERROR_IMAGE_FORMAT_ERROR;
+	}
+	if (elf->header->e_ident[EI_CLASS] != ELFCLASS32)
+	{
+		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))
+	{
+		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)
+	{
+		ERROR("invalid ELF file, no program headers");
+		return ERROR_IMAGE_FORMAT_ERROR;
+	}
+
+	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)
+	{
+		ERROR("cannot read ELF segment headers, read failed");
+		return retval;
+	}
+	if (read_bytes != elf->segment_count * sizeof(Elf32_Phdr))
+	{
+		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_memsz);
+			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;
+
+	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);
+		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)
+		{
+			ERROR("cannot find ELF segment content, seek failed");
+			return retval;
+		}
+		if ((retval = fileio_read(&elf->fileio, read_size, buffer, &really_read)) != ERROR_OK)
+		{
+			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
+		{
+			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 */
+			ERROR("incorrect record checksum found in S19 file");
+			return ERROR_IMAGE_CHECKSUM;
+		}
+	}
+
+	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;
-		char *url = source;
-		
+
 		image_binary = image->type_private = malloc(sizeof(image_binary_t));
-		
-		if ((retval = fileio_open(&image_binary->fileio, url, access, FILEIO_BINARY)) != ERROR_OK)
+
+		if ((retval = fileio_open(&image_binary->fileio, url, FILEIO_READ, FILEIO_BINARY)) != ERROR_OK)
 		{
-			strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING); 
+			strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 			ERROR(image->error_str);
 			return retval;
 		}
-		
-		if (access == FILEIO_WRITE)
-			image->size = 0;
-		else
-			image->size = image_binary->fileio.size;
-		
-		return ERROR_OK;
+
+		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;
-		char *url = source;
-		
-		if (access != FILEIO_READ)
-		{
-			snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
-				"can't open IHEX file for writing");
-			ERROR(image->error_str);
-			return ERROR_FILEIO_ACCESS_NOT_SUPPORTED;
-		}
-		
+
 		image_ihex = image->type_private = malloc(sizeof(image_ihex_t));
-		
+
 		if ((retval = fileio_open(&image_ihex->fileio, url, FILEIO_READ, FILEIO_TEXT)) != ERROR_OK)
 		{
-			strncpy(image->error_str, image_ihex->fileio.error_str, IMAGE_MAX_ERROR_STRING); 
+			strncpy(image->error_str, image_ihex->fileio.error_str, IMAGE_MAX_ERROR_STRING);
 			ERROR(image->error_str);
 			return retval;
 		}
-		
-		image_ihex->position = 0;
-		image_ihex->raw_size = image_ihex->fileio.size;
-		
+
 		if ((retval = image_ihex_buffer_complete(image)) != ERROR_OK)
 		{
 			snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
@@ -204,27 +683,119 @@ int image_open(image_t *image, void *source, enum fileio_access access)
 			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)
+		{
+			strncpy(image->error_str, image_elf->fileio.error_str, IMAGE_MAX_ERROR_STRING);
+			ERROR(image->error_str);
+			return retval;
+		}
+
+		if ((retval = image_elf_read_headers(image)) != ERROR_OK)
+		{
+			snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
+				"failed to read ELF headers, check daemon output for additional information");
+			ERROR(image->error_str);
+			fileio_close(&image_elf->fileio);
+			return retval;
+		}
+	}
 	else if (image->type == IMAGE_MEMORY)
 	{
 		image_memory_t *image_memory;
-		target_t *target = source;
-		
+
+		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 = target;
+
+		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)
+		{
+			strncpy(image->error_str, image_mot->fileio.error_str, IMAGE_MAX_ERROR_STRING);
+			ERROR(image->error_str);
+			return retval;
+		}
+
+		if ((retval = image_mot_buffer_complete(image)) != ERROR_OK)
+		{
+			snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
+				"failed buffering S19 image, check daemon output for additional information");
+			ERROR(image->error_str);
+			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(image_t *image, u32 size, u8 *buffer, u32 *size_read)
+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)
+	{
+		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)
+		{
+			strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING);
+			return retval;
+		}
+
+		/* return requested bytes */
 		if ((retval = fileio_read(&image_binary->fileio, size, buffer, size_read)) != ERROR_OK)
 		{
 			strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING);
@@ -233,57 +804,109 @@ int image_read(image_t *image, u32 size, u8 *buffer, u32 *size_read)
 	}
 	else if (image->type == IMAGE_IHEX)
 	{
-		image_ihex_t *image_ihex = image->type_private;
-	
-		if ((image_ihex->position + size) > image->size)
+		memcpy(buffer, (u8*)image->sections[section].private + offset, size);
+		*size_read = size;
+		image->error_str[0] = '\0';
+
+		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)
 		{
-			/* don't read past the end of the file */
-			size = (image->size - image_ihex->position);
+			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;
 		}
-	
-		memcpy(buffer, image_ihex->buffer + image_ihex->position, size);
-		image_ihex->position += size;
+	}
+	else if (image->type == IMAGE_SRECORD)
+	{
+		memcpy(buffer, (u8*)image->sections[section].private + offset, size);
 		*size_read = size;
 		image->error_str[0] = '\0';
-		
+
 		return ERROR_OK;
 	}
-	else if (image->type == IMAGE_MEMORY)
+	else if (image->type == IMAGE_BUILDER)
 	{
-		/* TODO: handle target memory pseudo image */
+		memcpy(buffer, (u8*)image->sections[section].private + offset, size);
+		*size_read = size;
+		image->error_str[0] = '\0';
+
+		return ERROR_OK;
 	}
-	
+
 	return ERROR_OK;
 }
 
-int image_write(image_t *image, u32 size, u8 *buffer, u32 *size_written)
+int image_add_section(image_t *image, u32 base, u32 size, int flags, u8 *data)
 {
-	int retval = ERROR_FILEIO_OPERATION_NOT_SUPPORTED;
-	
-	if (image->type == IMAGE_BINARY)
+	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)
 	{
-		image_binary_t *image_binary = image->type_private;
-		
-		if ((retval = fileio_write(&image_binary->fileio, size, buffer, size_written)) != ERROR_OK)
+		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))
 		{
-			strncpy(image->error_str, image_binary->fileio.error_str, IMAGE_MAX_ERROR_STRING);
-			return retval;
+			section->private = realloc(section->private, section->size + size);
+			memcpy((u8*)section->private + section->size, data, size);
+			section->size += size;
+			return ERROR_OK;
 		}
 	}
-	else if (image->type == IMAGE_IHEX)
-	{
-		return ERROR_FILEIO_OPERATION_NOT_SUPPORTED;
-	}
-	else if (image->type == IMAGE_MEMORY)
-	{
-		/* TODO: handle target memory pseudo image */
-	}
-	
-	if (retval != ERROR_OK)
-		return retval;
-		
-	image->size += size;
-	
+
+	/* 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;
 }
 
@@ -292,49 +915,115 @@ 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)
 	{
-		/* do nothing for now */
+		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;
 
-	free(image->type_private);
-	
-	return ERROR_OK;
-}
+		fileio_close(&image_mot->fileio);
 
-int identify_image_type(image_type_t *type, char *type_string)
-{
-	if (type_string)
-	{
-		if (!strcmp(type_string, "bin"))
+		if (image_mot->buffer)
 		{
-			*type = IMAGE_BINARY;
+			free(image_mot->buffer);
+			image_mot->buffer = NULL;
 		}
-		else if (!strcmp(type_string, "ihex"))
+	}
+	else if (image->type == IMAGE_BUILDER)
+	{
+		int i;
+
+		for (i = 0; i < image->num_sections; i++)
 		{
-			*type = IMAGE_IHEX;
+			free(image->sections[i].private);
+			image->sections[i].private = NULL;
 		}
-		else
+	}
+
+	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++)
 		{
-			return ERROR_IMAGE_TYPE_UNKNOWN;
+			/* as per gdb */
+			for (c = i << 24, j = 8; j > 0; --j)
+				c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+			crc32_table[i] = c;
 		}
 	}
-	else
+
+	while (nbytes--)
 	{
-		*type = IMAGE_BINARY;
+		/* as per gdb */
+		crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buffer++) & 255];
 	}
-	
+
+	*checksum = crc;
 	return ERROR_OK;
 }
+
+