/[dynamips]/trunk/rom2c.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /trunk/rom2c.c

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Revision 12 - (show annotations)
Sat Oct 6 16:45:40 2007 UTC (11 years, 7 months ago) by dpavlin
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1 /*
2 * Cisco router simulation platform.
3 * Copyright (c) 2006 Christophe Fillot (cf@utc.fr)
4 */
5
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <unistd.h>
9 #include <string.h>
10 #include <sys/types.h>
11 #include <sys/stat.h>
12 #include <sys/mman.h>
13 #include <signal.h>
14 #include <fcntl.h>
15 #include <assert.h>
16 #include <libelf.h>
17
18 #include "utils.h"
19
20 /* Extract ROM code+data from an ELF file and convert it into a C array */
21 int main(int argc,char *argv[])
22 {
23 unsigned char buffer[8];
24 m_uint32_t vaddr,start;
25 Elf32_Ehdr *ehdr;
26 Elf32_Phdr *phdr;
27 Elf *img_elf;
28 size_t len,clen;
29 int i,j,fd;
30 FILE *bfd,*fd_out;
31
32 if (argc != 4) {
33 fprintf(stderr,"Usage: %s <input_file> <output_file> <addr>\n",argv[0]);
34 exit(EXIT_FAILURE);
35 }
36
37 start = strtoul(argv[3],NULL,0);
38
39 if ((fd = open(argv[1],O_RDONLY)) == -1)
40 return(-1);
41
42 if (elf_version(EV_CURRENT) == EV_NONE) {
43 fprintf(stderr,"load_elf_image: library out of date\n");
44 return(-1);
45 }
46
47 if (!(img_elf = elf_begin(fd,ELF_C_READ,NULL))) {
48 fprintf(stderr,"load_elf_image: elf_begin: %s\n",
49 elf_errmsg(elf_errno()));
50 return(-1);
51 }
52
53 if (!(phdr = elf32_getphdr(img_elf))) {
54 fprintf(stderr,"load_elf_image: elf32_getphdr: %s\n",
55 elf_errmsg(elf_errno()));
56 return(-1);
57 }
58
59 if (!(fd_out = fopen(argv[2],"w"))) {
60 fprintf(stderr,"Unable to create file \"%s\"\n",argv[2]);
61 exit(EXIT_FAILURE);
62 }
63
64 ehdr = elf32_getehdr(img_elf);
65 phdr = elf32_getphdr(img_elf);
66
67 printf("Extracting ROM from ELF file '%s'...\n",argv[1]);
68 bfd = fdopen(fd,"r");
69
70 if (!bfd) {
71 perror("load_elf_image: fdopen");
72 return(-1);
73 }
74
75 for(i=0;i<ehdr->e_phnum;i++,phdr++)
76 {
77 fseek(bfd,phdr->p_offset,SEEK_SET);
78
79 vaddr = (m_uint64_t)phdr->p_vaddr;
80 len = phdr->p_filesz;
81
82 if (vaddr != start)
83 continue;
84
85 while(len > 0)
86 {
87 clen = fread(buffer,1,sizeof(buffer),bfd);
88
89 if (clen == 0)
90 break;
91
92 fprintf(fd_out," ");
93
94 for(j=0;j<clen;j++)
95 fprintf(fd_out,"0x%2.2x, ",buffer[j]);
96
97 fprintf(fd_out,"\n");
98 len -= clen;
99 }
100 }
101
102 fclose(fd_out);
103 return(0);
104 }

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