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 elffd = open(av[1], O_RDONLY);
29 if (fstat(elffd, &sbuf) == -1) {
33 elfbase = mmap(0, sbuf.st_size, PROT_READ,MAP_PRIVATE, elffd, 0);
39 if (hdr->e_ident[EI_MAG0] != ELFMAG0
40 || hdr->e_ident[EI_MAG1] != ELFMAG1
41 || hdr->e_ident[EI_MAG2] != ELFMAG2
42 || hdr->e_ident[EI_MAG3] != ELFMAG3
47 /* only dynamic files will have an soname */
48 if (hdr->e_type != ET_DYN) {
52 switch (hdr->e_ident[EI_CLASS]) {
61 /* check endian ness */
62 switch (hdr->e_ident[EI_DATA]) {
63 case ELFDATA2LSB: break;
64 case ELFDATA2MSB: break;
69 /* find the section header table */
70 for (i = 0; i < hdr->e_shnum; i++) {
71 shdr = (Elf64_Shdr *)((char *)elfbase + hdr->e_shoff + i * hdr->e_shentsize);
72 if (shdr->sh_type == SHT_DYNAMIC) {
74 } else if (shdr->sh_type == SHT_STRTAB && i == hdr->e_shstrndx) {
85 name = (char *) elfbase + strtab->sh_offset;
86 for (i = 0; i < hdr->e_shnum; i++) {
87 shdr = (Elf64_Shdr *)((char *)elfbase + hdr->e_shoff + i * hdr->e_shentsize);
88 if (shdr->sh_type == SHT_STRTAB && !strcmp(".dynstr", name+shdr->sh_name)) {
96 dynname = (char *) elfbase + dyntab->sh_offset;
97 for (dent = (Elf64_Dyn *)((char *)elfbase + dynsect->sh_offset); dent->d_tag != DT_NULL; dent++) {
98 if (dent->d_tag == DT_SONAME) {
99 printf("%s\n", dynname + dent->d_un.d_val);