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373 lines
9.7 KiB
C
373 lines
9.7 KiB
C
/*************************************************************************
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| COPYRIGHT (c) 2000 BY ABATRON AG
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|*************************************************************************
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| PROJECT NAME: Linux Image to S-record Conversion Utility
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| FILENAME : img2srec.c
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| COMPILER : GCC
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| TARGET OS : LINUX / UNIX
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| TARGET HW : -
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| PROGRAMMER : Abatron / RD
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| CREATION : 07.07.00
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|*************************************************************************
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| DESCRIPTION :
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| Utility to convert a Linux Boot Image to S-record:
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| ==================================================
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| This command line utility can be used to convert a Linux boot image
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| (zimage.initrd) to S-Record format used for flash programming.
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| This conversion takes care of the special sections "IMAGE" and INITRD".
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| img2srec [-o offset] image > image.srec
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| Build the utility:
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| ==================
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| To build the utility use GCC as follows:
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| gcc img2srec.c -o img2srec
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|*************************************************************************
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| UPDATES :
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| DATE NAME CHANGES
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| -----------------------------------------------------------
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| Latest update
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| 07.07.00 aba Initial release
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|*************************************************************************/
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/*************************************************************************
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| INCLUDES
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|*************************************************************************/
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#include "os_support.h"
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <elf.h>
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#include <unistd.h>
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#include <errno.h>
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/*************************************************************************
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| FUNCTIONS
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|*************************************************************************/
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static char* ExtractHex (uint32_t* value, char* getPtr)
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{
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uint32_t num;
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uint32_t digit;
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uint8_t c;
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while (*getPtr == ' ') getPtr++;
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num = 0;
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for (;;) {
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c = *getPtr;
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if ((c >= '0') && (c <= '9')) digit = (uint32_t)(c - '0');
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else if ((c >= 'A') && (c <= 'F')) digit = (uint32_t)(c - 'A' + 10);
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else if ((c >= 'a') && (c <= 'f')) digit = (uint32_t)(c - 'a' + 10);
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else break;
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num <<= 4;
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num += digit;
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getPtr++;
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} /* for */
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*value = num;
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return getPtr;
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} /* ExtractHex */
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static char* ExtractDecimal (uint32_t* value, char* getPtr)
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{
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uint32_t num;
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uint32_t digit;
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uint8_t c;
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while (*getPtr == ' ') getPtr++;
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num = 0;
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for (;;) {
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c = *getPtr;
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if ((c >= '0') && (c <= '9')) digit = (uint32_t)(c - '0');
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else break;
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num *= 10;
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num += digit;
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getPtr++;
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} /* for */
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*value = num;
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return getPtr;
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} /* ExtractDecimal */
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static void ExtractNumber (uint32_t* value, char* getPtr)
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{
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bool neg = false;
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while (*getPtr == ' ') getPtr++;
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if (*getPtr == '-') {
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neg = true;
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getPtr++;
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} /* if */
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if ((*getPtr == '0') && ((*(getPtr+1) == 'x') || (*(getPtr+1) == 'X'))) {
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getPtr +=2;
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(void)ExtractHex(value, getPtr);
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} /* if */
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else {
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(void)ExtractDecimal(value, getPtr);
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} /* else */
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if (neg) *value = -(*value);
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} /* ExtractNumber */
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static uint8_t* ExtractWord(uint16_t* value, uint8_t* buffer)
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{
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uint16_t x;
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x = (uint16_t)*buffer++;
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x = (x<<8) + (uint16_t)*buffer++;
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*value = x;
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return buffer;
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} /* ExtractWord */
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static uint8_t* ExtractLong(uint32_t* value, uint8_t* buffer)
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{
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uint32_t x;
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x = (uint32_t)*buffer++;
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x = (x<<8) + (uint32_t)*buffer++;
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x = (x<<8) + (uint32_t)*buffer++;
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x = (x<<8) + (uint32_t)*buffer++;
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*value = x;
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return buffer;
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} /* ExtractLong */
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static uint8_t* ExtractBlock(uint16_t count, uint8_t* data, uint8_t* buffer)
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{
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while (count--) *data++ = *buffer++;
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return buffer;
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} /* ExtractBlock */
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static char* WriteHex(char* pa, uint8_t value, uint16_t* pCheckSum)
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{
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uint16_t temp;
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static char ByteToHex[] = "0123456789ABCDEF";
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*pCheckSum += value;
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temp = value / 16;
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*pa++ = ByteToHex[temp];
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temp = value % 16;
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*pa++ = ByteToHex[temp];
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return pa;
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}
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static char* BuildSRecord(char* pa, uint16_t sType, uint32_t addr,
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const uint8_t* data, int nCount)
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{
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uint16_t addrLen;
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uint16_t sRLen;
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uint16_t checkSum;
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uint16_t i;
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switch (sType) {
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case 0:
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case 1:
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case 9:
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addrLen = 2;
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break;
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case 2:
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case 8:
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addrLen = 3;
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break;
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case 3:
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case 7:
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addrLen = 4;
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break;
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default:
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return pa;
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} /* switch */
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*pa++ = 'S';
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*pa++ = (char)(sType + '0');
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sRLen = addrLen + nCount + 1;
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checkSum = 0;
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pa = WriteHex(pa, (uint8_t)sRLen, &checkSum);
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/* Write address field */
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for (i = 1; i <= addrLen; i++) {
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pa = WriteHex(pa, (uint8_t)(addr >> (8 * (addrLen - i))), &checkSum);
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} /* for */
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/* Write code/data fields */
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for (i = 0; i < nCount; i++) {
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pa = WriteHex(pa, *data++, &checkSum);
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} /* for */
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/* Write checksum field */
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checkSum = ~checkSum;
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pa = WriteHex(pa, (uint8_t)checkSum, &checkSum);
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*pa++ = '\0';
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return pa;
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}
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static void ConvertELF(char* fileName, uint32_t loadOffset)
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{
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FILE* file;
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int i;
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int rxCount;
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uint8_t rxBlock[1024];
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uint32_t loadSize;
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uint32_t firstAddr;
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uint32_t loadAddr;
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uint32_t loadDiff = 0;
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Elf32_Ehdr elfHeader;
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Elf32_Shdr sectHeader[32];
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uint8_t* getPtr;
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char srecLine[128];
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char *hdr_name;
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/* open file */
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if ((file = fopen(fileName,"rb")) == NULL) {
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fprintf (stderr, "Can't open %s: %s\n", fileName, strerror(errno));
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return;
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} /* if */
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/* read ELF header */
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rxCount = fread(rxBlock, 1, sizeof elfHeader, file);
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getPtr = ExtractBlock(sizeof elfHeader.e_ident, elfHeader.e_ident, rxBlock);
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getPtr = ExtractWord(&elfHeader.e_type, getPtr);
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getPtr = ExtractWord(&elfHeader.e_machine, getPtr);
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getPtr = ExtractLong((uint32_t *)&elfHeader.e_version, getPtr);
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getPtr = ExtractLong((uint32_t *)&elfHeader.e_entry, getPtr);
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getPtr = ExtractLong((uint32_t *)&elfHeader.e_phoff, getPtr);
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getPtr = ExtractLong((uint32_t *)&elfHeader.e_shoff, getPtr);
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getPtr = ExtractLong((uint32_t *)&elfHeader.e_flags, getPtr);
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getPtr = ExtractWord(&elfHeader.e_ehsize, getPtr);
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getPtr = ExtractWord(&elfHeader.e_phentsize, getPtr);
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getPtr = ExtractWord(&elfHeader.e_phnum, getPtr);
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getPtr = ExtractWord(&elfHeader.e_shentsize, getPtr);
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getPtr = ExtractWord(&elfHeader.e_shnum, getPtr);
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getPtr = ExtractWord(&elfHeader.e_shstrndx, getPtr);
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if ( (rxCount != sizeof elfHeader)
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|| (elfHeader.e_ident[0] != ELFMAG0)
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|| (elfHeader.e_ident[1] != ELFMAG1)
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|| (elfHeader.e_ident[2] != ELFMAG2)
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|| (elfHeader.e_ident[3] != ELFMAG3)
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|| (elfHeader.e_type != ET_EXEC)
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) {
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fclose(file);
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fprintf (stderr, "*** illegal file format\n");
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return;
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} /* if */
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/* read all section headers */
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fseek(file, elfHeader.e_shoff, SEEK_SET);
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for (i = 0; i < elfHeader.e_shnum; i++) {
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rxCount = fread(rxBlock, 1, sizeof sectHeader[0], file);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_name, rxBlock);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_type, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_flags, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_addr, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_offset, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_size, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_link, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_info, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_addralign, getPtr);
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getPtr = ExtractLong((uint32_t *)§Header[i].sh_entsize, getPtr);
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if (rxCount != sizeof sectHeader[0]) {
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fclose(file);
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fprintf (stderr, "*** illegal file format\n");
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return;
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} /* if */
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} /* for */
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if ((hdr_name = strrchr(fileName, '/')) == NULL) {
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hdr_name = fileName;
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} else {
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++hdr_name;
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}
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/* write start record */
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(void)BuildSRecord(srecLine, 0, 0, (uint8_t *)hdr_name, strlen(hdr_name));
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printf("%s\r\n",srecLine);
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/* write data records */
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firstAddr = ~0;
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loadAddr = 0;
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for (i = 0; i < elfHeader.e_shnum; i++) {
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if ( (sectHeader[i].sh_type == SHT_PROGBITS)
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&& (sectHeader[i].sh_size != 0)
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) {
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loadSize = sectHeader[i].sh_size;
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if (sectHeader[i].sh_flags != 0) {
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loadAddr = sectHeader[i].sh_addr;
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loadDiff = loadAddr - sectHeader[i].sh_offset;
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} /* if */
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else {
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loadAddr = sectHeader[i].sh_offset + loadDiff;
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} /* else */
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if (loadAddr < firstAddr)
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firstAddr = loadAddr;
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/* build s-records */
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loadSize = sectHeader[i].sh_size;
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fseek(file, sectHeader[i].sh_offset, SEEK_SET);
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while (loadSize) {
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rxCount = fread(rxBlock, 1, (loadSize > 32) ? 32 : loadSize, file);
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if (rxCount < 0) {
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fclose(file);
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fprintf (stderr, "*** illegal file format\n");
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return;
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} /* if */
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(void)BuildSRecord(srecLine, 3, loadAddr + loadOffset, rxBlock, rxCount);
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loadSize -= rxCount;
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loadAddr += rxCount;
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printf("%s\r\n",srecLine);
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} /* while */
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} /* if */
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} /* for */
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/* add end record */
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(void)BuildSRecord(srecLine, 7, firstAddr + loadOffset, 0, 0);
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printf("%s\r\n",srecLine);
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fclose(file);
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} /* ConvertELF */
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/*************************************************************************
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| MAIN
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|*************************************************************************/
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int main( int argc, char *argv[ ])
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{
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uint32_t offset;
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if (argc == 2) {
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ConvertELF(argv[1], 0);
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} /* if */
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else if ((argc == 4) && (strcmp(argv[1], "-o") == 0)) {
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ExtractNumber(&offset, argv[2]);
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ConvertELF(argv[3], offset);
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} /* if */
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else {
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fprintf (stderr, "Usage: img2srec [-o offset] <image>\n");
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} /* if */
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return 0;
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} /* main */
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