X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fimage.c;h=cf7e11ab1c45442ed9106d366e39dfd7d8a659f1;hp=1f65e3ffb2599105ac117a04ce0705c449fae272;hb=ca594adb5a71f2bf60c1380172b8e61b075d9479;hpb=7087b66f19a7d60025f7315baa26d682804f3640

diff --git a/src/target/image.c b/src/target/image.c
index 1f65e3ffb2..cf7e11ab1c 100644
--- a/src/target/image.c
+++ b/src/target/image.c
@@ -2,6 +2,15 @@
  *   Copyright (C) 2007 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
+ *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
+ *   oyvind.harboe@zylin.com                                               *
+ *                                                                         *
+ *   Copyright (C) 2008 by Spencer Oliver                                  *
+ *   spen@spen-soft.co.uk                                                  *
+ *                                                                         *
+ *   Copyright (C) 2009 by Franck Hereson                                  *
+ *   franck.hereson@secad.fr                                               *
+ *                                                                         *
  *   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     *
@@ -21,78 +30,164 @@
 #include "config.h"
 #endif
 
-#include <stdlib.h>
-#include <string.h>
-#include <elf.h>
-
 #include "image.h"
-
-#include "types.h"
-#include "replacements.h"
+#include "target.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)) 
+	((elf->endianness == ELFDATA2LSB)? \
+		le_to_h_u16((uint8_t*)&field):be_to_h_u16((uint8_t*)&field))
 
 #define field32(elf,field)\
-	((elf->endianness==ELFDATA2LSB)? \
-		le_to_h_u32((u8*)&field):be_to_h_u32((u8*)&field)) 
+	((elf->endianness == ELFDATA2LSB)? \
+		le_to_h_u32((uint8_t*)&field):be_to_h_u32((uint8_t*)&field))
 
-int image_ihex_buffer_complete(image_t *image)
+static int autodetect_image_type(image_t *image, const char *url)
+{
+	int retval;
+	fileio_t fileio;
+	uint32_t read_bytes;
+	uint8_t 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;
+}
+
+static int identify_image_type(image_t *image, const char *type_string, const 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;
+}
+
+static int image_ihex_buffer_complete(image_t *image)
 {
 	image_ihex_t *ihex = image->type_private;
 	fileio_t *fileio = &ihex->fileio;
-	u32 raw_bytes_read, raw_bytes;
-	int retval;
-	u32 full_address = 0x0;
-	char *buffer = malloc(fileio->size);
-	u32 cooked_bytes;
+	uint32_t full_address = 0x0;
+	uint32_t 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];
-	
-	if ((retval = fileio_read(fileio, fileio->size, (u8*)buffer, &raw_bytes_read)) != ERROR_OK)
-	{
-		free(buffer);
-		ERROR("failed buffering IHEX file, read failed");
-		return ERROR_FILEIO_OPERATION_FAILED;
-	}
-	
-	if (raw_bytes_read != fileio->size)
-	{
-		free(buffer);
-		ERROR("failed buffering complete IHEX file, only partially read");
-		return ERROR_FILEIO_OPERATION_FAILED;
-	}
 
 	ihex->buffer = malloc(fileio->size >> 1);
-	raw_bytes = 0x0;
 	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 (raw_bytes < raw_bytes_read)
+
+	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)
+		uint32_t count;
+		uint32_t address;
+		uint32_t record_type;
+		uint32_t checksum;
+		uint8_t cal_checksum = 0;
+		uint32_t bytes_read = 0;
+
+		if (sscanf(&lpszLine[bytes_read], ":%2" SCNx32 "%4" SCNx32 "%2" SCNx32 , &count, &address, &record_type) != 3)
 		{
 			return ERROR_IMAGE_FORMAT_ERROR;
 		}
-		raw_bytes += 9;
-		
+		bytes_read += 9;
+
+		cal_checksum += (uint8_t)count;
+		cal_checksum += (uint8_t)(address >> 8);
+		cal_checksum += (uint8_t)address;
+		cal_checksum += (uint8_t)record_type;
+
 		if (record_type == 0) /* Data Record */
 		{
 			if ((full_address & 0xffff) != address)
@@ -104,6 +199,12 @@ int image_ihex_buffer_complete(image_t *image)
 				if (section[image->num_sections].size != 0)
 				{
 					image->num_sections++;
+					if (image->num_sections >= IMAGE_MAX_SECTIONS)
+					{
+						/* too many sections */
+						LOG_ERROR("Too many sections found in IHEX file");
+						return ERROR_IMAGE_FORMAT_ERROR;
+					}
 					section[image->num_sections].size = 0x0;
 					section[image->num_sections].flags = 0;
 					section[image->num_sections].private = &ihex->buffer[cooked_bytes];
@@ -112,11 +213,14 @@ int image_ihex_buffer_complete(image_t *image)
 					(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;
+				unsigned value;
+				sscanf(&lpszLine[bytes_read], "%2x", &value);
+				ihex->buffer[cooked_bytes] = (uint8_t)value;
+				cal_checksum += (uint8_t)ihex->buffer[cooked_bytes];
+				bytes_read += 2;
 				cooked_bytes += 1;
 				section[image->num_sections].size += 1;
 				full_address++;
@@ -126,28 +230,74 @@ int image_ihex_buffer_complete(image_t *image)
 		{
 			/* 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->base_address_set) ? image->base_address : 0);
+				image->sections[i].base_address = section[i].base_address;
 				image->sections[i].size = section[i].size;
 				image->sections[i].flags = section[i].flags;
 			}
-			
-			free(buffer);
+
 			return ERROR_OK;
 		}
+		else if (record_type == 2) /* Linear Address Record */
+		{
+			uint16_t upper_address;
+
+			sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
+			cal_checksum += (uint8_t)(upper_address >> 8);
+			cal_checksum += (uint8_t)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++;
+					if (image->num_sections >= IMAGE_MAX_SECTIONS)
+					{
+						/* too many sections */
+						LOG_ERROR("Too many sections found in IHEX file");
+						return ERROR_IMAGE_FORMAT_ERROR;
+					}
+					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 */
+		{
+			uint32_t 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], "%2" SCNx32 , &dummy);
+				cal_checksum += (uint8_t)dummy;
+				bytes_read += 2;
+			}
+		}
 		else if (record_type == 4) /* Extended Linear Address Record */
 		{
-			u16 upper_address;
-			
-			sscanf(&buffer[raw_bytes], "%4hx", &upper_address);
-			raw_bytes += 4;
-			
+			uint16_t upper_address;
+
+			sscanf(&lpszLine[bytes_read], "%4hx", &upper_address);
+			cal_checksum += (uint8_t)(upper_address >> 8);
+			cal_checksum += (uint8_t)upper_address;
+			bytes_read += 4;
+
 			if ((full_address >> 16) != upper_address)
 			{
 				/* we encountered a nonconsecutive location, create a new section,
@@ -157,160 +307,184 @@ int image_ihex_buffer_complete(image_t *image)
 				if (section[image->num_sections].size != 0)
 				{
 					image->num_sections++;
+					if (image->num_sections >= IMAGE_MAX_SECTIONS)
+					{
+						/* too many sections */
+						LOG_ERROR("Too many sections found in IHEX file");
+						return ERROR_IMAGE_FORMAT_ERROR;
+					}
 					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 = 
+				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(&buffer[raw_bytes], "%8x", &start_address);
-			raw_bytes += 8;
-			
+			uint32_t start_address;
+
+			sscanf(&lpszLine[bytes_read], "%8" SCNx32, &start_address);
+			cal_checksum += (uint8_t)(start_address >> 24);
+			cal_checksum += (uint8_t)(start_address >> 16);
+			cal_checksum += (uint8_t)(start_address >> 8);
+			cal_checksum += (uint8_t)start_address;
+			bytes_read += 8;
+
 			image->start_address_set = 1;
-			image->start_address = be_to_h_u32((u8*)&start_address);
+			image->start_address = be_to_h_u32((uint8_t*)&start_address);
 		}
 		else
 		{
-			free(buffer);
-			ERROR("unhandled IHEX record type: %i", record_type);
+		  LOG_ERROR("unhandled IHEX record type: %i", (int)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], "%2" SCNx32 , &checksum);
+		bytes_read += 2;
+
+		if ((uint8_t)checksum != (uint8_t)(~cal_checksum + 1))
+		{
+			/* checksum failed */
+			LOG_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");
+	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)
+static int image_elf_read_headers(image_t *image)
 {
 	image_elf_t *elf = image->type_private;
-	u32 read_bytes;
-	u32 i,j;
+	uint32_t read_bytes;
+	uint32_t 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)
+	if (elf->header == NULL)
 	{
-		ERROR("cannot read ELF file header, read failed");
+		LOG_ERROR("insufficient memory to perform operation ");
+		return ERROR_FILEIO_OPERATION_FAILED;
+	}
+
+	if ((retval = fileio_read(&elf->fileio, sizeof(Elf32_Ehdr), (uint8_t*)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))
 	{
-		ERROR("cannot read ELF file header, only partially read");
+		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)
+	if (strncmp((char*)elf->header->e_ident,ELFMAG,SELFMAG) != 0)
 	{
-		ERROR("invalid ELF file, bad magic number");
+		LOG_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");
+		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==ELFDATANONE)
-		 ||(elf->endianness>=ELFDATANUM))
+	if ((elf->endianness != ELFDATA2LSB)
+		 &&(elf->endianness != ELFDATA2MSB))
 	{
-		ERROR("invalid ELF file, unknown endianess setting");
+		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)
+	if (elf->segment_count == 0)
 	{
-		ERROR("invalid ELF file, no program headers");
+		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 (elf->segments == NULL)
+	{
+		LOG_ERROR("insufficient memory to perform operation ");
+		return ERROR_FILEIO_OPERATION_FAILED;
+	}
 
-	if ((retval = fileio_read(&elf->fileio, elf->segment_count*sizeof(Elf32_Phdr), (u8*)elf->segments, &read_bytes)) != ERROR_OK)
+	if ((retval = fileio_read(&elf->fileio, elf->segment_count*sizeof(Elf32_Phdr), (uint8_t*)elf->segments, &read_bytes)) != ERROR_OK)
 	{
-		ERROR("cannot read ELF segment headers, read failed");
+		LOG_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");
+		LOG_ERROR("cannot read ELF segment headers, only partially read");
 		return ERROR_FILEIO_OPERATION_FAILED;
 	}
 
-	/* count useful segments (loadable) */
+	/* 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)
+	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++)
+	for (i = 0,j = 0;i < elf->segment_count;i++)
 	{
-		if (field32(elf,elf->segments[i].p_type) == PT_LOAD)
+		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_vaddr);
+			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)
+static int image_elf_read_section(image_t *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, uint32_t *size_read)
 {
 	image_elf_t *elf = image->type_private;
 	Elf32_Phdr *segment = (Elf32_Phdr *)image->sections[section].private;
-	u32 read_size,really_read;
+	uint32_t read_size,really_read;
 	int retval;
 
 	*size_read = 0;
-	
-	DEBUG("load segment %d at 0x%x (sz=0x%x)",section,offset,size);
+
+	LOG_DEBUG("load segment %d at 0x%" PRIx32 " (sz = 0x%" PRIx32 ")",section,offset,size);
 
 	/* read initialized data in current segment if any */
-	if (offset<field32(elf,segment->p_filesz))
+	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);
+		LOG_DEBUG("read elf: size = 0x%" PRIx32 " at 0x%" PRIx32 "",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)
+		if ((retval = fileio_seek(&elf->fileio, field32(elf,segment->p_offset) + offset)) != ERROR_OK)
 		{
-			ERROR("cannot find ELF segment content, seek failed");
+			LOG_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");
+			LOG_ERROR("cannot read ELF segment content, read failed");
 			return retval;
 		}
 		buffer += read_size;
@@ -321,75 +495,220 @@ int image_elf_read_section(image_t *image, int section, u32 offset, u32 size, u8
 		if (!size)
 			return ERROR_OK;
 	}
-	/* if there is remaining zeroed area in current segment */
-	if (offset<field32(elf,segment->p_memsz))
+
+	return ERROR_OK;
+}
+
+static int image_mot_buffer_complete(image_t *image)
+{
+	image_mot_t *mot = image->type_private;
+	fileio_t *fileio = &mot->fileio;
+	uint32_t full_address = 0x0;
+	uint32_t 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)
 	{
-		/* fill zeroed part (BSS) of the segment */
-		read_size = MIN(size, field32(elf,segment->p_memsz)-offset);
-		DEBUG("zero fill: size = 0x%x",read_size);
-		memset(buffer,0,read_size);
-		*size_read += read_size;
+		uint32_t count;
+		uint32_t address;
+		uint32_t record_type;
+		uint32_t checksum;
+		uint8_t cal_checksum = 0;
+		uint32_t bytes_read = 0;
+
+		/* get record type and record length */
+		if (sscanf(&lpszLine[bytes_read], "S%1" SCNx32 "%2" SCNx32 , &record_type, &count) != 2)
+		{
+			return ERROR_IMAGE_FORMAT_ERROR;
+		}
+
+		bytes_read += 4;
+		cal_checksum += (uint8_t)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 += (uint8_t)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], "%4" SCNx32, &address);
+					cal_checksum += (uint8_t)(address >> 8);
+					cal_checksum += (uint8_t)address;
+					bytes_read += 4;
+					count -=2;
+					break;
+
+				case 2:
+					/* S2 - 24 bit address data record */
+					sscanf(&lpszLine[bytes_read], "%6" SCNx32 , &address);
+					cal_checksum += (uint8_t)(address >> 16);
+					cal_checksum += (uint8_t)(address >> 8);
+					cal_checksum += (uint8_t)address;
+					bytes_read += 6;
+					count -=3;
+					break;
+
+				case 3:
+					/* S3 - 32 bit address data record */
+					sscanf(&lpszLine[bytes_read], "%8" SCNx32 , &address);
+					cal_checksum += (uint8_t)(address >> 24);
+					cal_checksum += (uint8_t)(address >> 16);
+					cal_checksum += (uint8_t)(address >> 8);
+					cal_checksum += (uint8_t)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)
+			{
+				unsigned value;
+				sscanf(&lpszLine[bytes_read], "%2x", &value);
+				mot->buffer[cooked_bytes] = (uint8_t)value;
+				cal_checksum += (uint8_t)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 */
+			uint32_t dummy;
+
+			while (count-- > 0)
+			{
+				sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &dummy);
+				cal_checksum += (uint8_t)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", (int)(record_type));
+			return ERROR_IMAGE_FORMAT_ERROR;
+		}
+
+		/* account for checksum, will always be 0xFF */
+		sscanf(&lpszLine[bytes_read], "%2" SCNx32 , &checksum);
+		cal_checksum += (uint8_t)checksum;
+		bytes_read += 2;
+
+		if (cal_checksum != 0xFF)
+		{
+			/* checksum failed */
+			LOG_ERROR("incorrect record checksum found in S19 file");
+			return ERROR_IMAGE_CHECKSUM;
+		}
 	}
-	
-	return ERROR_OK;
+
+	LOG_ERROR("premature end of S19 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_open(image_t *image, const char *url, const 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); 
-			ERROR(image->error_str);
 			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;
-		
-		if (image->base_address_set == 1)
-			image->sections[0].base_address = image->base_address;
-		
-		return ERROR_OK;
 	}
 	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); 
-			ERROR(image->error_str);
 			return retval;
 		}
-		
+
 		if ((retval = image_ihex_buffer_complete(image)) != ERROR_OK)
 		{
-			snprintf(image->error_str, IMAGE_MAX_ERROR_STRING,
-				"failed buffering IHEX image, check daemon output for additional information");
-			ERROR(image->error_str);
+			LOG_ERROR("failed buffering IHEX image, check daemon output for additional information");
 			fileio_close(&image_ihex->fileio);
 			return retval;
 		}
@@ -397,74 +716,124 @@ int image_open(image_t *image, void *source, enum fileio_access access)
 	else if (image->type == IMAGE_ELF)
 	{
 		image_elf_t *image_elf;
-		char *url = source;
-		
+
 		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)
 	{
+		target_t *target = get_target(url);
+
+		if (target == NULL)
+		{
+			LOG_ERROR("target '%s' not defined", url);
+			return ERROR_FAIL;
+		}
+
 		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->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 image_read_section(image_t *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, uint32_t *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%8.8" PRIx32 " + 0x%8.8" PRIx32 " > 0x%8.8" PRIx32 "",
+				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;
-			
-		if ((offset > image->sections[0].size) || (offset + size > image->sections[0].size))
-			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);
 			return retval;
 		}
 	}
 	else if (image->type == IMAGE_IHEX)
 	{
-		memcpy(buffer, (u8*)image->sections[section].private + offset, size);
+		memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
 		*size_read = size;
-		image->error_str[0] = '\0';
-		
+
 		return ERROR_OK;
 	}
 	else if (image->type == IMAGE_ELF)
@@ -473,83 +842,218 @@ int image_read_section(image_t *image, int section, u32 offset, u32 size, u8 *bu
 	}
 	else if (image->type == IMAGE_MEMORY)
 	{
-		/* TODO: handle target memory pseudo image */
+		image_memory_t *image_memory = image->type_private;
+		uint32_t address = image->sections[section].base_address + offset;
+
+		*size_read = 0;
+
+		while ((size - *size_read) > 0)
+		{
+			uint32_t 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, (uint8_t*)image->sections[section].private + offset, size);
+		*size_read = size;
+
+		return ERROR_OK;
+	}
+	else if (image->type == IMAGE_BUILDER)
+	{
+		memcpy(buffer, (uint8_t*)image->sections[section].private + offset, size);
+		*size_read = size;
+
+		return ERROR_OK;
+	}
+
+	return ERROR_OK;
+}
+
+int image_add_section(image_t *image, uint32_t base, uint32_t size, int flags, uint8_t *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((uint8_t*)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(uint8_t) * size);
+	memcpy((uint8_t*)section->private, data, size);
+
 	return ERROR_OK;
 }
 
-int image_close(image_t *image)
+void 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->section_pointer)
-			free(image_ihex->section_pointer);
-		
+
 		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;
+
+		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);
-	
-	return ERROR_OK;
+		image->sections = NULL;
+	}
 }
 
-int identify_image_type(image_type_t *type, char *type_string)
+int image_calculate_checksum(uint8_t* buffer, uint32_t nbytes, uint32_t* checksum)
 {
-	if (type_string)
+	uint32_t crc = 0xffffffff;
+	LOG_DEBUG("Calculating checksum");
+
+	uint32_t crc32_table[256];
+
+	/* Initialize the CRC table and the decoding table.  */
+	int i, j;
+	unsigned int c;
+	for (i = 0; i < 256; i++)
 	{
-		if (!strcmp(type_string, "bin"))
-		{
-			*type = IMAGE_BINARY;
-		}
-		else if (!strcmp(type_string, "ihex"))
-		{
-			*type = IMAGE_IHEX;
-		}
-		else if (!strcmp(type_string, "elf"))
+		/* 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 > 0)
+	{
+		int run = nbytes;
+		if (run > 32768)
 		{
-			*type = IMAGE_ELF;
+			run = 32768;
 		}
-		else
+		nbytes -= run;
+		while (run--)
 		{
-			return ERROR_IMAGE_TYPE_UNKNOWN;
+			/* as per gdb */
+			crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buffer++) & 255];
 		}
+		keep_alive();
 	}
-	else
-	{
-		*type = IMAGE_BINARY;
-	}
-	
+
+	LOG_DEBUG("Calculating checksum done");
+
+	*checksum = crc;
 	return ERROR_OK;
 }