1 #define _POSIX_C_SOURCE 200112L
14 int main(int ac, char **av) {
20 Elf64_Shdr *dynsect = 0;
21 Elf64_Shdr *strtab = 0, *dyntab = 0;
25 if (lstat(av[1], &sbuf) == -1) {
28 if (!S_ISREG(sbuf.st_mode)) {
32 elffd = open(av[1], O_RDONLY);
36 if (fstat(elffd, &sbuf) == -1) {
39 if (!S_ISREG(sbuf.st_mode)) {
43 elfbase = mmap(0, sbuf.st_size, PROT_READ,MAP_PRIVATE, elffd, 0);
49 if (hdr->e_ident[EI_MAG0] != ELFMAG0
50 || hdr->e_ident[EI_MAG1] != ELFMAG1
51 || hdr->e_ident[EI_MAG2] != ELFMAG2
52 || hdr->e_ident[EI_MAG3] != ELFMAG3
57 /* only dynamic files will have an soname */
58 if (hdr->e_type != ET_DYN) {
62 switch (hdr->e_ident[EI_CLASS]) {
71 /* check endian ness */
72 switch (hdr->e_ident[EI_DATA]) {
73 case ELFDATA2LSB: break;
74 case ELFDATA2MSB: break;
79 /* find the section header table */
80 for (i = 0; i < hdr->e_shnum; i++) {
81 shdr = (Elf64_Shdr *)((char *)elfbase + hdr->e_shoff + i * hdr->e_shentsize);
82 if (shdr->sh_type == SHT_DYNAMIC) {
84 } else if (shdr->sh_type == SHT_STRTAB && i == hdr->e_shstrndx) {
95 name = (char *) elfbase + strtab->sh_offset;
96 for (i = 0; i < hdr->e_shnum; i++) {
97 shdr = (Elf64_Shdr *)((char *)elfbase + hdr->e_shoff + i * hdr->e_shentsize);
98 if (shdr->sh_type == SHT_STRTAB && !strcmp(".dynstr", name+shdr->sh_name)) {
106 dynname = (char *) elfbase + dyntab->sh_offset;
107 for (dent = (Elf64_Dyn *)((char *)elfbase + dynsect->sh_offset); dent->d_tag != DT_NULL; dent++) {
108 if (dent->d_tag == DT_SONAME) {
109 printf("%s\n", dynname + dent->d_un.d_val);