int build_elf_exec_info(const char *buf, off_t len, struct mem_ehdr *ehdr,
uint32_t flags)
{
struct mem_phdr *phdr, *end_phdr;
int result;
result = build_elf_info(buf, len, ehdr, flags);
if (result < 0) {
return result;
}
if ((ehdr->e_type != ET_EXEC) && (ehdr->e_type != ET_DYN)) {
/* not an ELF executable */
if (probe_debug) {
fprintf(stderr, "Not ELF type ET_EXEC or ET_DYN\n");
}
return -1;
}
if (!ehdr->e_phdr) {
/* No program header */
fprintf(stderr, "No ELF program header\n");
return -1;
}
end_phdr = &ehdr->e_phdr[ehdr->e_phnum];
for(phdr = ehdr->e_phdr; phdr != end_phdr; phdr++) {
/* Kexec does not support loading interpreters.
* In addition this check keeps us from attempting
* to kexec ordinay executables.
*/
if (phdr->p_type == PT_INTERP) {
fprintf(stderr, "Requires an ELF interpreter\n");
return -1;
}
}
return 0;
}
int build_elf_rel_info(const char *buf, off_t len, struct mem_ehdr *ehdr,
uint32_t flags)
{
int result;
result = build_elf_info(buf, len, ehdr, flags);
if (result < 0) {
return result;
}
if (ehdr->e_type != ET_REL) {
/* not an ELF relocate object */
if (probe_debug) {
fprintf(stderr, "Not ELF type ET_REL\n");
fprintf(stderr, "ELF Type: %x\n", ehdr->e_type);
}
return -1;
}
if (!ehdr->e_shdr) {
/* No section headers */
if (probe_debug) {
fprintf(stderr, "No ELF section headers\n");
}
return -1;
}
if (!machine_verify_elf_rel(ehdr)) {
/* It does not meant the native architecture constraints */
if (probe_debug) {
fprintf(stderr, "ELF architecture constraint failure\n");
}
return -1;
}
return 0;
}
