?? img2srec.c
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/*************************************************************************| 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 <stddef.h>#include <stdio.h>#include <stdlib.h>#include <ctype.h>#include <string.h>#include <elf.h>#include <unistd.h>#include <errno.h>#if defined(__BEOS__) || defined(__NetBSD__)#include <inttypes.h>#endifextern int errno;/*************************************************************************| DEFINES|*************************************************************************/#define FALSE 0#define TRUE 1/*************************************************************************| MACROS|*************************************************************************//*************************************************************************| TYPEDEFS|*************************************************************************/typedef uint8_t CHAR;typedef uint8_t BYTE;typedef uint16_t WORD;typedef uint32_t DWORD;typedef int BOOL;/*************************************************************************| LOCALS|*************************************************************************//*************************************************************************| PROTOTYPES|*************************************************************************/static char *ExtractHex(DWORD *value, char *getPtr);static char *ExtractDecimal(DWORD *value, char *getPtr);static void ExtractNumber(DWORD *value, char *getPtr);static BYTE *ExtractWord(WORD *value, BYTE *buffer);static BYTE *ExtractLong(DWORD *value, BYTE *buffer);static BYTE *ExtractBlock(WORD count, BYTE *data, BYTE *buffer);static char *WriteHex(char *pa, BYTE value, WORD *pCheckSum);static char *BuildSRecord(char *pa, WORD sType, DWORD addr, const BYTE *data, int nCount);static void ConvertELF(char *fileName, DWORD loadOffset);int main(int argc, char *argv[]);/*************************************************************************| FUNCTIONS|*************************************************************************/static char* ExtractHex (DWORD* value, char* getPtr){ DWORD num; DWORD digit; BYTE c; while (*getPtr == ' ') getPtr++; num = 0; for (;;) { c = *getPtr; if ((c >= '0') && (c <= '9')) digit = (DWORD)(c - '0'); else if ((c >= 'A') && (c <= 'F')) digit = (DWORD)(c - 'A' + 10); else if ((c >= 'a') && (c <= 'f')) digit = (DWORD)(c - 'a' + 10); else break; num <<= 4; num += digit; getPtr++; } /* for */ *value = num; return getPtr;} /* ExtractHex */static char* ExtractDecimal (DWORD* value, char* getPtr){ DWORD num; DWORD digit; BYTE c; while (*getPtr == ' ') getPtr++; num = 0; for (;;) { c = *getPtr; if ((c >= '0') && (c <= '9')) digit = (DWORD)(c - '0'); else break; num *= 10; num += digit; getPtr++; } /* for */ *value = num; return getPtr;} /* ExtractDecimal */static void ExtractNumber (DWORD* 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 BYTE* ExtractWord(WORD* value, BYTE* buffer){ WORD x; x = (WORD)*buffer++; x = (x<<8) + (WORD)*buffer++; *value = x; return buffer;} /* ExtractWord */static BYTE* ExtractLong(DWORD* value, BYTE* buffer){ DWORD x; x = (DWORD)*buffer++; x = (x<<8) + (DWORD)*buffer++; x = (x<<8) + (DWORD)*buffer++; x = (x<<8) + (DWORD)*buffer++; *value = x; return buffer;} /* ExtractLong */static BYTE* ExtractBlock(WORD count, BYTE* data, BYTE* buffer){ while (count--) *data++ = *buffer++; return buffer;} /* ExtractBlock */static char* WriteHex(char* pa, BYTE value, WORD* pCheckSum){ WORD 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, WORD sType, DWORD addr, const BYTE* data, int nCount){ WORD addrLen; WORD sRLen; WORD checkSum; WORD 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, (BYTE)sRLen, &checkSum); /* Write address field */ for (i = 1; i <= addrLen; i++) { pa = WriteHex(pa, (BYTE)(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, (BYTE)checkSum, &checkSum); *pa++ = '\0'; return pa;}static void ConvertELF(char* fileName, DWORD loadOffset){ FILE* file; int i; int rxCount; BYTE rxBlock[1024]; DWORD loadSize; DWORD firstAddr; DWORD loadAddr; DWORD loadDiff = 0; Elf32_Ehdr elfHeader; Elf32_Shdr sectHeader[32]; BYTE* 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((DWORD *)&elfHeader.e_version, getPtr); getPtr = ExtractLong((DWORD *)&elfHeader.e_entry, getPtr); getPtr = ExtractLong((DWORD *)&elfHeader.e_phoff, getPtr); getPtr = ExtractLong((DWORD *)&elfHeader.e_shoff, getPtr); getPtr = ExtractLong((DWORD *)&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((DWORD *)§Header[i].sh_name, rxBlock); getPtr = ExtractLong((DWORD *)§Header[i].sh_type, getPtr); getPtr = ExtractLong((DWORD *)§Header[i].sh_flags, getPtr); getPtr = ExtractLong((DWORD *)§Header[i].sh_addr, getPtr); getPtr = ExtractLong((DWORD *)§Header[i].sh_offset, getPtr); getPtr = ExtractLong((DWORD *)§Header[i].sh_size, getPtr); getPtr = ExtractLong((DWORD *)§Header[i].sh_link, getPtr); getPtr = ExtractLong((DWORD *)§Header[i].sh_info, getPtr); getPtr = ExtractLong((DWORD *)§Header[i].sh_addralign, getPtr); getPtr = ExtractLong((DWORD *)§Header[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, (BYTE *)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[ ]){ DWORD 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 */?? 快捷鍵說明
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