calmsacibis995
99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
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#include <stdio.h>
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#include <libelf.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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char *namelist[] = {
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"addrs",
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0,
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};
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static void elf64_scan(char *, Elf *);
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extern Elf64_Sym * elf64_findsym(char *, char *, Elf *);
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extern void elf64_read_program_data(char *, Elf *, Elf64_Sym *);
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static void elf32_scan(char *, Elf *);
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extern Elf32_Sym * elf32_findsym(char *, char *, Elf *);
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extern void elf32_read_program_data(char *, Elf *, Elf32_Sym *);
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main(int argc, char **argv)
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{
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char *fname;
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Elf *elf;
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Elf_Cmd cmd;
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int fd;
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if (argc != 2) {
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fprintf(stderr, "Usage: read_offsets <filename>\n");
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exit(1);
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}
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fname = argv[1];
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if (elf_version(EV_CURRENT) == EV_NONE) {
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fprintf(stderr,
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"out of date with respect to current ELF version\n");
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exit(1);
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}
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if ((fd = open(fname, O_RDONLY)) == -1) {
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fprintf(stderr, "could not open %s\n", fname);
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exit(1);
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}
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cmd = ELF_C_READ;
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elf = elf_begin(fd, cmd, (Elf *)NULL);
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if (elf != NULL) {
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if (elf32_getehdr(elf) != NULL)
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elf32_scan(fname, elf);
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else if (elf64_getehdr(elf) != NULL)
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elf64_scan(fname, elf);
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}
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elf_end(elf);
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exit(0);
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/* NOTREACHED */
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}
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static void
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elf64_scan(char *fname, Elf *elf)
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{
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Elf64_Sym *sym;
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int list;
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char *cursearch;
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for (list = 0; list < sizeof(namelist) / sizeof(namelist[0]); list++) {
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cursearch = namelist[list];
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if (cursearch == NULL)
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break;
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if ((sym = elf64_findsym(fname, cursearch, elf)) == NULL) {
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fprintf(stderr, "Cannot find symbol %s in %s\n",
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cursearch, fname);
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exit(1);
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}
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elf64_read_program_data(fname, elf, sym);
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}
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}
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static void
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elf32_scan(char *fname, Elf *elf)
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{
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Elf32_Sym *sym;
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int list;
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char *cursearch;
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for (list = 0; list < sizeof(namelist) / sizeof(namelist[0]); list++) {
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cursearch = namelist[list];
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if (cursearch == NULL)
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break;
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if ((sym = elf32_findsym(fname, cursearch, elf)) == NULL) {
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fprintf(stderr, "Cannot find symbol %s in %s\n",
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cursearch, fname);
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exit(1);
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}
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elf32_read_program_data(fname, elf, sym);
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}
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}
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