2 * Extract the loadable program segment from an elf file.
4 * Copyright 1996 Paul Mackerras.
14 rd(void *buf, int len)
18 nr = fread(buf, 1, len, fi);
22 fprintf(stderr, "%s: read error\n", ni);
24 fprintf(stderr, "%s: short file\n", ni);
29 main(int ac, char **av)
34 unsigned long phoffset, phsize, prevaddr;
36 if (ac > 3 || (ac > 1 && av[1][0] == '-')) {
37 fprintf(stderr, "Usage: %s [elf-file [image-file]]\n", av[0]);
56 if (eh.e_ident[EI_MAG0] != ELFMAG0
57 || eh.e_ident[EI_MAG1] != ELFMAG1
58 || eh.e_ident[EI_MAG2] != ELFMAG2
59 || eh.e_ident[EI_MAG3] != ELFMAG3) {
60 fprintf(stderr, "%s: not an ELF file\n", ni);
64 fseek(fi, eh.e_phoff, 0);
66 for (i = 0; i < eh.e_phnum; ++i) {
68 if (ph.p_type != PT_LOAD)
70 if (phsize == 0 || prevaddr == 0) {
71 phoffset = ph.p_offset;
74 phsize = ph.p_offset + ph.p_filesz - phoffset;
75 prevaddr = ph.p_vaddr;
78 fprintf(stderr, "%s: doesn't have a loadable segment\n", ni);
91 fseek(fi, phoffset, 0);
92 for (len = phsize; len != 0; len -= nb) {
97 if (fwrite(buf, 1, nb, fo) != nb) {
98 fprintf(stderr, "%s: write error\n", no);