[J-u-boot.git] / tools / img2srec.c

/*************************************************************************
|  COPYRIGHT (c) 2000 BY ABATRON AG
|*************************************************************************
|
|  PROJECT NAME: Linux Image to S-record Conversion Utility
|  FILENAME    : img2srec.c
|
|  COMPILER    : GCC
|
|  TARGET OS   : LINUX / UNIX
|  TARGET HW   : -
|
|  PROGRAMMER  : Abatron / RD
|  CREATION    : 07.07.00
|
|*************************************************************************
|
|  DESCRIPTION :
|
|  Utility to convert a Linux Boot Image to S-record:
|  ==================================================
|
|  This command line utility can be used to convert a Linux boot image
|  (zimage.initrd) to S-Record format used for flash programming.
|  This conversion takes care of the special sections "IMAGE" and INITRD".
|
|  img2srec [-o offset] image > image.srec
|
|
|  Build the utility:
|  ==================
|
|  To build the utility use GCC as follows:
|
|  gcc img2srec.c -o img2srec
|
|
|*************************************************************************
|
|
|  UPDATES     :
|
|  DATE      NAME  CHANGES
|  -----------------------------------------------------------
|  Latest update
|
|  07.07.00  aba   Initial release
|
|*************************************************************************/

/*************************************************************************
|  INCLUDES
|*************************************************************************/

#include "os_support.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <elf.h>
#include <unistd.h>
#include <errno.h>

/*************************************************************************
|  FUNCTIONS
|*************************************************************************/

static char* ExtractHex (uint32_t* value,  char* getPtr)
{
  uint32_t num;
  uint32_t digit;
  uint8_t  c;

  while (*getPtr == ' ') getPtr++;
  num = 0;
  for (;;) {
    c = *getPtr;
    if      ((c >= '0') && (c <= '9')) digit = (uint32_t)(c - '0');
    else if ((c >= 'A') && (c <= 'F')) digit = (uint32_t)(c - 'A' + 10);
    else if ((c >= 'a') && (c <= 'f')) digit = (uint32_t)(c - 'a' + 10);
    else break;
    num <<= 4;
    num += digit;
    getPtr++;
  } /* for */
  *value = num;
  return getPtr;
} /* ExtractHex */

static char* ExtractDecimal (uint32_t* value,  char* getPtr)
{
  uint32_t num;
  uint32_t digit;
  uint8_t  c;

  while (*getPtr == ' ') getPtr++;
  num = 0;
  for (;;) {
    c = *getPtr;
    if      ((c >= '0') && (c <= '9')) digit = (uint32_t)(c - '0');
    else break;
    num *= 10;
    num += digit;
    getPtr++;
  } /* for */
  *value = num;
  return getPtr;
} /* ExtractDecimal */


static void ExtractNumber (uint32_t* value,  char* getPtr)
{
  bool  neg = false;

  while (*getPtr == ' ') getPtr++;
  if (*getPtr == '-') {
    neg = true;
    getPtr++;
  } /* if */
  if ((*getPtr == '0') && ((*(getPtr+1) == 'x') || (*(getPtr+1) == 'X'))) {
    getPtr +=2;
    (void)ExtractHex(value, getPtr);
  } /* if */
  else {
    (void)ExtractDecimal(value, getPtr);
  } /* else */
  if (neg) *value = -(*value);
} /* ExtractNumber */


static uint8_t* ExtractWord(uint16_t* value, uint8_t* buffer)
{
  uint16_t x;
  x = (uint16_t)*buffer++;
  x = (x<<8) + (uint16_t)*buffer++;
  *value = x;
  return buffer;
} /* ExtractWord */


static uint8_t* ExtractLong(uint32_t* value, uint8_t* buffer)
{
  uint32_t x;
  x = (uint32_t)*buffer++;
  x = (x<<8) + (uint32_t)*buffer++;
  x = (x<<8) + (uint32_t)*buffer++;
  x = (x<<8) + (uint32_t)*buffer++;
  *value = x;
  return buffer;
} /* ExtractLong */


static uint8_t* ExtractBlock(uint16_t count, uint8_t* data, uint8_t* buffer)
{
  while (count--) *data++ = *buffer++;
  return buffer;
} /* ExtractBlock */


static char* WriteHex(char* pa, uint8_t value, uint16_t* pCheckSum)
{
  uint16_t  temp;

  static  char ByteToHex[] = "0123456789ABCDEF";

  *pCheckSum += value;
  temp  = value / 16;
  *pa++ = ByteToHex[temp];
  temp  = value % 16;
  *pa++ = ByteToHex[temp];
  return pa;
}


static char* BuildSRecord(char* pa, uint16_t sType, uint32_t addr,
			  const uint8_t* data, int nCount)
{
  uint16_t  addrLen;
  uint16_t  sRLen;
  uint16_t  checkSum;
  uint16_t  i;

  switch (sType) {
  case 0:
  case 1:
  case 9:
    addrLen = 2;
    break;
  case 2:
  case 8:
    addrLen = 3;
    break;
  case 3:
  case 7:
    addrLen = 4;
    break;
  default:
    return pa;
  } /* switch */

  *pa++ = 'S';
  *pa++ = (char)(sType + '0');
  sRLen = addrLen + nCount + 1;
  checkSum = 0;
  pa = WriteHex(pa, (uint8_t)sRLen, &checkSum);

  /* Write address field */
  for (i = 1; i <= addrLen; i++) {
    pa = WriteHex(pa, (uint8_t)(addr >> (8 * (addrLen - i))), &checkSum);
  } /* for */

  /* Write code/data fields */
  for (i = 0; i < nCount; i++) {
    pa = WriteHex(pa, *data++, &checkSum);
  } /* for */

  /* Write checksum field */
  checkSum = ~checkSum;
  pa = WriteHex(pa, (uint8_t)checkSum, &checkSum);
  *pa++ = '\0';
  return pa;
}


static void ConvertELF(char* fileName, uint32_t loadOffset)
{
  FILE*         file;
  int           i;
  int           rxCount;
  uint8_t          rxBlock[1024];
  uint32_t         loadSize;
  uint32_t         firstAddr;
  uint32_t         loadAddr;
  uint32_t         loadDiff = 0;
  Elf32_Ehdr    elfHeader;
  Elf32_Shdr    sectHeader[32];
  uint8_t*         getPtr;
  char          srecLine[128];
  char		*hdr_name;


  /* open file */
  if ((file = fopen(fileName,"rb")) == NULL) {
    fprintf (stderr, "Can't open %s: %s\n", fileName, strerror(errno));
    return;
  } /* if */

  /* read ELF header */
  rxCount = fread(rxBlock, 1, sizeof elfHeader, file);
  getPtr = ExtractBlock(sizeof elfHeader.e_ident, elfHeader.e_ident, rxBlock);
  getPtr = ExtractWord(&elfHeader.e_type, getPtr);
  getPtr = ExtractWord(&elfHeader.e_machine, getPtr);
  getPtr = ExtractLong((uint32_t *)&elfHeader.e_version, getPtr);
  getPtr = ExtractLong((uint32_t *)&elfHeader.e_entry, getPtr);
  getPtr = ExtractLong((uint32_t *)&elfHeader.e_phoff, getPtr);
  getPtr = ExtractLong((uint32_t *)&elfHeader.e_shoff, getPtr);
  getPtr = ExtractLong((uint32_t *)&elfHeader.e_flags, getPtr);
  getPtr = ExtractWord(&elfHeader.e_ehsize, getPtr);
  getPtr = ExtractWord(&elfHeader.e_phentsize, getPtr);
  getPtr = ExtractWord(&elfHeader.e_phnum, getPtr);
  getPtr = ExtractWord(&elfHeader.e_shentsize, getPtr);
  getPtr = ExtractWord(&elfHeader.e_shnum, getPtr);
  getPtr = ExtractWord(&elfHeader.e_shstrndx, getPtr);
  if (    (rxCount              != sizeof elfHeader)
       || (elfHeader.e_ident[0] != ELFMAG0)
       || (elfHeader.e_ident[1] != ELFMAG1)
       || (elfHeader.e_ident[2] != ELFMAG2)
       || (elfHeader.e_ident[3] != ELFMAG3)
       || (elfHeader.e_type     != ET_EXEC)
     ) {
    fclose(file);
    fprintf (stderr, "*** illegal file format\n");
    return;
  } /* if */

  /* read all section headers */
  fseek(file, elfHeader.e_shoff, SEEK_SET);
  for (i = 0; i < elfHeader.e_shnum; i++) {
    rxCount = fread(rxBlock, 1, sizeof sectHeader[0], file);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_name, rxBlock);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_type, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_flags, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_addr, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_offset, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_size, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_link, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_info, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_addralign, getPtr);
    getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_entsize, getPtr);
    if (rxCount != sizeof sectHeader[0]) {
      fclose(file);
      fprintf (stderr, "*** illegal file format\n");
      return;
    } /* if */
  } /* for */

  if ((hdr_name = strrchr(fileName, '/')) == NULL) {
    hdr_name = fileName;
  } else {
    ++hdr_name;
  }
  /* write start record */
  (void)BuildSRecord(srecLine, 0, 0, (uint8_t *)hdr_name, strlen(hdr_name));
  printf("%s\r\n",srecLine);

  /* write data records */
  firstAddr = ~0;
  loadAddr  =  0;
  for (i = 0; i < elfHeader.e_shnum; i++) {
    if (    (sectHeader[i].sh_type == SHT_PROGBITS)
	 && (sectHeader[i].sh_size != 0)
	 ) {
      loadSize = sectHeader[i].sh_size;
      if (sectHeader[i].sh_flags != 0) {
	loadAddr = sectHeader[i].sh_addr;
	loadDiff = loadAddr - sectHeader[i].sh_offset;
      } /* if */
      else {
	loadAddr = sectHeader[i].sh_offset + loadDiff;
      } /* else */

      if (loadAddr < firstAddr)
	firstAddr = loadAddr;

      /* build s-records */
      loadSize = sectHeader[i].sh_size;
      fseek(file, sectHeader[i].sh_offset, SEEK_SET);
      while (loadSize) {
	rxCount = fread(rxBlock, 1, (loadSize > 32) ? 32 : loadSize, file);
	if (rxCount < 0) {
	  fclose(file);
	  fprintf (stderr, "*** illegal file format\n");
	return;
	} /* if */
	(void)BuildSRecord(srecLine, 3, loadAddr + loadOffset, rxBlock, rxCount);
	loadSize -= rxCount;
	loadAddr += rxCount;
	printf("%s\r\n",srecLine);
      } /* while */
    } /* if */
  } /* for */

  /* add end record */
  (void)BuildSRecord(srecLine, 7, firstAddr + loadOffset, 0, 0);
  printf("%s\r\n",srecLine);
  fclose(file);
} /* ConvertELF */


/*************************************************************************
|  MAIN
|*************************************************************************/

int main( int argc, char *argv[ ])
{
  uint32_t offset;

  if (argc == 2) {
    ConvertELF(argv[1], 0);
  } /* if */
  else if ((argc == 4) && (strcmp(argv[1], "-o") == 0)) {
    ExtractNumber(&offset, argv[2]);
    ConvertELF(argv[3], offset);
  } /* if */
  else {
    fprintf (stderr, "Usage: img2srec [-o offset] <image>\n");
  } /* if */

  return 0;
} /* main */
Commit	Line	Data
89752b9b WD	1	/*************************************************************************
	2	\| COPYRIGHT (c) 2000 BY ABATRON AG
	3	\|*************************************************************************
	4	\|
	5	\| PROJECT NAME: Linux Image to S-record Conversion Utility
	6	\| FILENAME : img2srec.c
	7	\|
	8	\| COMPILER : GCC
	9	\|
	10	\| TARGET OS : LINUX / UNIX
	11	\| TARGET HW : -
	12	\|
	13	\| PROGRAMMER : Abatron / RD
	14	\| CREATION : 07.07.00
	15	\|
	16	\|*************************************************************************
	17	\|
	18	\| DESCRIPTION :
	19	\|
	20	\| Utility to convert a Linux Boot Image to S-record:
	21	\| ==================================================
	22	\|
	23	\| This command line utility can be used to convert a Linux boot image
	24	\| (zimage.initrd) to S-Record format used for flash programming.
	25	\| This conversion takes care of the special sections "IMAGE" and INITRD".
	26	\|
	27	\| img2srec [-o offset] image > image.srec
	28	\|
	29	\|
	30	\| Build the utility:
	31	\| ==================
	32	\|
	33	\| To build the utility use GCC as follows:
	34	\|
	35	\| gcc img2srec.c -o img2srec
	36	\|
	37	\|
	38	\|*************************************************************************
	39	\|
	40	\|
	41	\| UPDATES :
	42	\|
	43	\| DATE NAME CHANGES
	44	\| -----------------------------------------------------------
	45	\| Latest update
	46	\|
	47	\| 07.07.00 aba Initial release
	48	\|
	49	\|*************************************************************************/
	50
	51	/*************************************************************************
	52	\| INCLUDES
	53	\|*************************************************************************/
	54
37566090	55	#include "os_support.h"
fd66066e	56	#include <stdbool.h>
89752b9b WD	57	#include <stddef.h>
	58	#include <stdio.h>
	59	#include <stdlib.h>
	60	#include <ctype.h>
	61	#include <string.h>
	62	#include <elf.h>
	63	#include <unistd.h>
	64	#include <errno.h>
	65
89752b9b WD	66	/*************************************************************************
	67	\| FUNCTIONS
	68	\|*************************************************************************/
	69
fd66066e	70	static char* ExtractHex (uint32_t* value, char* getPtr)
89752b9b	71	{
fd66066e MF	72	uint32_t num;
	73	uint32_t digit;
	74	uint8_t c;
89752b9b WD	75
	76	while (*getPtr == ' ') getPtr++;
	77	num = 0;
	78	for (;;) {
	79	c = *getPtr;
fd66066e MF	80	if ((c >= '0') && (c <= '9')) digit = (uint32_t)(c - '0');
	81	else if ((c >= 'A') && (c <= 'F')) digit = (uint32_t)(c - 'A' + 10);
	82	else if ((c >= 'a') && (c <= 'f')) digit = (uint32_t)(c - 'a' + 10);
89752b9b WD	83	else break;
	84	num <<= 4;
	85	num += digit;
	86	getPtr++;
	87	} /* for */
	88	*value = num;
	89	return getPtr;
	90	} /* ExtractHex */
	91
fd66066e	92	static char* ExtractDecimal (uint32_t* value, char* getPtr)
89752b9b	93	{
fd66066e MF	94	uint32_t num;
	95	uint32_t digit;
	96	uint8_t c;
89752b9b WD	97
	98	while (*getPtr == ' ') getPtr++;
	99	num = 0;
	100	for (;;) {
	101	c = *getPtr;
fd66066e	102	if ((c >= '0') && (c <= '9')) digit = (uint32_t)(c - '0');
89752b9b WD	103	else break;
	104	num *= 10;
	105	num += digit;
	106	getPtr++;
	107	} /* for */
	108	*value = num;
	109	return getPtr;
	110	} /* ExtractDecimal */
	111
	112
fd66066e	113	static void ExtractNumber (uint32_t* value, char* getPtr)
89752b9b	114	{
51855e89	115	bool neg = false;
89752b9b WD	116
	117	while (*getPtr == ' ') getPtr++;
	118	if (*getPtr == '-') {
fd66066e	119	neg = true;
89752b9b WD	120	getPtr++;
	121	} /* if */
	122	if ((getPtr == '0') && (((getPtr+1) == 'x') \|\| (*(getPtr+1) == 'X'))) {
	123	getPtr +=2;
	124	(void)ExtractHex(value, getPtr);
	125	} /* if */
	126	else {
	127	(void)ExtractDecimal(value, getPtr);
	128	} /* else */
	129	if (neg) value = -(value);
	130	} /* ExtractNumber */
	131
	132
fd66066e	133	static uint8_t* ExtractWord(uint16_t* value, uint8_t* buffer)
89752b9b	134	{
fd66066e MF	135	uint16_t x;
	136	x = (uint16_t)*buffer++;
	137	x = (x<<8) + (uint16_t)*buffer++;
89752b9b WD	138	*value = x;
	139	return buffer;
	140	} /* ExtractWord */
	141
	142
fd66066e	143	static uint8_t* ExtractLong(uint32_t* value, uint8_t* buffer)
89752b9b	144	{
fd66066e MF	145	uint32_t x;
	146	x = (uint32_t)*buffer++;
	147	x = (x<<8) + (uint32_t)*buffer++;
	148	x = (x<<8) + (uint32_t)*buffer++;
	149	x = (x<<8) + (uint32_t)*buffer++;
89752b9b WD	150	*value = x;
	151	return buffer;
	152	} /* ExtractLong */
	153
	154
fd66066e	155	static uint8_t* ExtractBlock(uint16_t count, uint8_t* data, uint8_t* buffer)
89752b9b WD	156	{
	157	while (count--) data++ = buffer++;
	158	return buffer;
	159	} /* ExtractBlock */
	160
	161
fd66066e	162	static char* WriteHex(char* pa, uint8_t value, uint16_t* pCheckSum)
89752b9b	163	{
fd66066e	164	uint16_t temp;
89752b9b WD	165
	166	static char ByteToHex[] = "0123456789ABCDEF";
	167
	168	*pCheckSum += value;
	169	temp = value / 16;
	170	*pa++ = ByteToHex[temp];
	171	temp = value % 16;
	172	*pa++ = ByteToHex[temp];
	173	return pa;
	174	}
	175
	176
fd66066e MF	177	static char* BuildSRecord(char* pa, uint16_t sType, uint32_t addr,
fd66066e MF	178	const uint8_t* data, int nCount)
89752b9b	179	{
fd66066e MF	180	uint16_t addrLen;
	181	uint16_t sRLen;
	182	uint16_t checkSum;
	183	uint16_t i;
89752b9b WD	184
	185	switch (sType) {
	186	case 0:
	187	case 1:
	188	case 9:
	189	addrLen = 2;
	190	break;
	191	case 2:
	192	case 8:
	193	addrLen = 3;
	194	break;
	195	case 3:
	196	case 7:
	197	addrLen = 4;
	198	break;
	199	default:
	200	return pa;
	201	} /* switch */
	202
	203	*pa++ = 'S';
	204	*pa++ = (char)(sType + '0');
	205	sRLen = addrLen + nCount + 1;
	206	checkSum = 0;
fd66066e	207	pa = WriteHex(pa, (uint8_t)sRLen, &checkSum);
89752b9b WD	208
	209	/* Write address field */
	210	for (i = 1; i <= addrLen; i++) {
fd66066e	211	pa = WriteHex(pa, (uint8_t)(addr >> (8 * (addrLen - i))), &checkSum);
89752b9b WD	212	} /* for */
	213
	214	/* Write code/data fields */
	215	for (i = 0; i < nCount; i++) {
	216	pa = WriteHex(pa, *data++, &checkSum);
	217	} /* for */
	218
	219	/* Write checksum field */
	220	checkSum = ~checkSum;
fd66066e	221	pa = WriteHex(pa, (uint8_t)checkSum, &checkSum);
89752b9b WD	222	*pa++ = '\0';
	223	return pa;
	224	}
	225
	226
fd66066e	227	static void ConvertELF(char* fileName, uint32_t loadOffset)
89752b9b WD	228	{
	229	FILE* file;
	230	int i;
	231	int rxCount;
fd66066e MF	232	uint8_t rxBlock[1024];
	233	uint32_t loadSize;
	234	uint32_t firstAddr;
	235	uint32_t loadAddr;
	236	uint32_t loadDiff = 0;
89752b9b WD	237	Elf32_Ehdr elfHeader;
89752b9b WD	238	Elf32_Shdr sectHeader[32];
fd66066e	239	uint8_t* getPtr;
89752b9b WD	240	char srecLine[128];
	241	char *hdr_name;
	242
	243
	244	/* open file */
	245	if ((file = fopen(fileName,"rb")) == NULL) {
	246	fprintf (stderr, "Can't open %s: %s\n", fileName, strerror(errno));
	247	return;
	248	} /* if */
	249
	250	/* read ELF header */
	251	rxCount = fread(rxBlock, 1, sizeof elfHeader, file);
	252	getPtr = ExtractBlock(sizeof elfHeader.e_ident, elfHeader.e_ident, rxBlock);
	253	getPtr = ExtractWord(&elfHeader.e_type, getPtr);
	254	getPtr = ExtractWord(&elfHeader.e_machine, getPtr);
fd66066e MF	255	getPtr = ExtractLong((uint32_t *)&elfHeader.e_version, getPtr);
	256	getPtr = ExtractLong((uint32_t *)&elfHeader.e_entry, getPtr);
	257	getPtr = ExtractLong((uint32_t *)&elfHeader.e_phoff, getPtr);
	258	getPtr = ExtractLong((uint32_t *)&elfHeader.e_shoff, getPtr);
	259	getPtr = ExtractLong((uint32_t *)&elfHeader.e_flags, getPtr);
89752b9b WD	260	getPtr = ExtractWord(&elfHeader.e_ehsize, getPtr);
	261	getPtr = ExtractWord(&elfHeader.e_phentsize, getPtr);
	262	getPtr = ExtractWord(&elfHeader.e_phnum, getPtr);
	263	getPtr = ExtractWord(&elfHeader.e_shentsize, getPtr);
	264	getPtr = ExtractWord(&elfHeader.e_shnum, getPtr);
	265	getPtr = ExtractWord(&elfHeader.e_shstrndx, getPtr);
	266	if ( (rxCount != sizeof elfHeader)
	267	\|\| (elfHeader.e_ident[0] != ELFMAG0)
	268	\|\| (elfHeader.e_ident[1] != ELFMAG1)
	269	\|\| (elfHeader.e_ident[2] != ELFMAG2)
	270	\|\| (elfHeader.e_ident[3] != ELFMAG3)
	271	\|\| (elfHeader.e_type != ET_EXEC)
	272	) {
	273	fclose(file);
	274	fprintf (stderr, "*** illegal file format\n");
	275	return;
	276	} /* if */
	277
	278	/* read all section headers */
	279	fseek(file, elfHeader.e_shoff, SEEK_SET);
	280	for (i = 0; i < elfHeader.e_shnum; i++) {
	281	rxCount = fread(rxBlock, 1, sizeof sectHeader[0], file);
fd66066e MF	282	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_name, rxBlock);
	283	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_type, getPtr);
	284	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_flags, getPtr);
	285	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_addr, getPtr);
	286	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_offset, getPtr);
	287	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_size, getPtr);
	288	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_link, getPtr);
	289	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_info, getPtr);
	290	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_addralign, getPtr);
	291	getPtr = ExtractLong((uint32_t *)&sectHeader[i].sh_entsize, getPtr);
89752b9b WD	292	if (rxCount != sizeof sectHeader[0]) {
	293	fclose(file);
	294	fprintf (stderr, "*** illegal file format\n");
	295	return;
	296	} /* if */
	297	} /* for */
	298
	299	if ((hdr_name = strrchr(fileName, '/')) == NULL) {
	300	hdr_name = fileName;
	301	} else {
	302	++hdr_name;
	303	}
	304	/* write start record */
fd66066e	305	(void)BuildSRecord(srecLine, 0, 0, (uint8_t *)hdr_name, strlen(hdr_name));
89752b9b WD	306	printf("%s\r\n",srecLine);
	307
	308	/* write data records */
	309	firstAddr = ~0;
	310	loadAddr = 0;
	311	for (i = 0; i < elfHeader.e_shnum; i++) {
	312	if ( (sectHeader[i].sh_type == SHT_PROGBITS)
8bde7f77 WD	313	&& (sectHeader[i].sh_size != 0)
8bde7f77 WD	314	) {
89752b9b WD	315	loadSize = sectHeader[i].sh_size;
89752b9b WD	316	if (sectHeader[i].sh_flags != 0) {
8bde7f77 WD	317	loadAddr = sectHeader[i].sh_addr;
8bde7f77 WD	318	loadDiff = loadAddr - sectHeader[i].sh_offset;
89752b9b WD	319	} /* if */
89752b9b WD	320	else {
8bde7f77	321	loadAddr = sectHeader[i].sh_offset + loadDiff;
89752b9b WD	322	} /* else */
	323
	324	if (loadAddr < firstAddr)
8bde7f77	325	firstAddr = loadAddr;
89752b9b WD	326
	327	/* build s-records */
	328	loadSize = sectHeader[i].sh_size;
	329	fseek(file, sectHeader[i].sh_offset, SEEK_SET);
	330	while (loadSize) {
8bde7f77 WD	331	rxCount = fread(rxBlock, 1, (loadSize > 32) ? 32 : loadSize, file);
	332	if (rxCount < 0) {
	333	fclose(file);
	334	fprintf (stderr, "*** illegal file format\n");
	335	return;
	336	} /* if */
	337	(void)BuildSRecord(srecLine, 3, loadAddr + loadOffset, rxBlock, rxCount);
	338	loadSize -= rxCount;
	339	loadAddr += rxCount;
	340	printf("%s\r\n",srecLine);
89752b9b WD	341	} /* while */
	342	} /* if */
	343	} /* for */
	344
	345	/* add end record */
	346	(void)BuildSRecord(srecLine, 7, firstAddr + loadOffset, 0, 0);
	347	printf("%s\r\n",srecLine);
	348	fclose(file);
	349	} /* ConvertELF */
	350
	351
	352	/*************************************************************************
	353	\| MAIN
	354	\|*************************************************************************/
	355
	356	int main( int argc, char *argv[ ])
	357	{
fd66066e	358	uint32_t offset;
89752b9b WD	359
	360	if (argc == 2) {
	361	ConvertELF(argv[1], 0);
	362	} /* if */
	363	else if ((argc == 4) && (strcmp(argv[1], "-o") == 0)) {
	364	ExtractNumber(&offset, argv[2]);
	365	ConvertELF(argv[3], offset);
	366	} /* if */
	367	else {
	368	fprintf (stderr, "Usage: img2srec [-o offset] <image>\n");
	369	} /* if */
	370
	371	return 0;
	372	} /* main */