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/* |
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* Cisco router simulation platform. |
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* Copyright (c) 2006 Christophe Fillot (cf@utc.fr) |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/mman.h> |
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#include <signal.h> |
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#include <fcntl.h> |
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#include <assert.h> |
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#include <libelf.h> |
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#include "utils.h" |
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/* Extract ROM code+data from an ELF file and convert it into a C array */ |
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int main(int argc,char *argv[]) |
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{ |
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unsigned char buffer[8]; |
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m_uint32_t vaddr,start; |
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Elf32_Ehdr *ehdr; |
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Elf32_Phdr *phdr; |
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Elf *img_elf; |
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size_t len,clen; |
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int i,j,fd; |
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FILE *bfd,*fd_out; |
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if (argc != 4) { |
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fprintf(stderr,"Usage: %s <input_file> <output_file> <addr>\n",argv[0]); |
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exit(EXIT_FAILURE); |
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} |
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start = strtoul(argv[3],NULL,0); |
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if ((fd = open(argv[1],O_RDONLY)) == -1) |
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return(-1); |
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if (elf_version(EV_CURRENT) == EV_NONE) { |
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fprintf(stderr,"load_elf_image: library out of date\n"); |
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return(-1); |
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} |
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if (!(img_elf = elf_begin(fd,ELF_C_READ,NULL))) { |
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fprintf(stderr,"load_elf_image: elf_begin: %s\n", |
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elf_errmsg(elf_errno())); |
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return(-1); |
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} |
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if (!(phdr = elf32_getphdr(img_elf))) { |
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fprintf(stderr,"load_elf_image: elf32_getphdr: %s\n", |
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elf_errmsg(elf_errno())); |
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return(-1); |
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} |
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if (!(fd_out = fopen(argv[2],"w"))) { |
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fprintf(stderr,"Unable to create file \"%s\"\n",argv[2]); |
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exit(EXIT_FAILURE); |
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} |
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ehdr = elf32_getehdr(img_elf); |
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phdr = elf32_getphdr(img_elf); |
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printf("Extracting ROM from ELF file '%s'...\n",argv[1]); |
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bfd = fdopen(fd,"r"); |
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if (!bfd) { |
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perror("load_elf_image: fdopen"); |
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return(-1); |
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} |
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for(i=0;i<ehdr->e_phnum;i++,phdr++) |
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{ |
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fseek(bfd,phdr->p_offset,SEEK_SET); |
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vaddr = (m_uint64_t)phdr->p_vaddr; |
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len = phdr->p_filesz; |
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if (vaddr != start) |
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continue; |
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while(len > 0) |
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{ |
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clen = fread(buffer,1,sizeof(buffer),bfd); |
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if (clen == 0) |
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break; |
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fprintf(fd_out," "); |
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for(j=0;j<clen;j++) |
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fprintf(fd_out,"0x%2.2x, ",buffer[j]); |
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fprintf(fd_out,"\n"); |
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len -= clen; |
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} |
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} |
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fclose(fd_out); |
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return(0); |
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} |