Function parse_elf

util/cbfstool/elfheaders.c:486–552

}

int parse_elf(const struct buffer *pinput, struct parsed_elf *pelf, int flags)
{
	struct xdr *xdr = &xdr_le;
	int bit64 = 0;
	struct buffer input;
	Elf64_Ehdr *ehdr;

	/* Zero out the parsed elf structure. */
	memset(pelf, 0, sizeof(*pelf));

	if (buffer_size(pinput) < sizeof(*ehdr)) {
		DEBUG("The stage file is too short!\n");
		return -1;
	}

	if (!iself(buffer_get(pinput))) {
		DEBUG("The stage file is not in ELF format!\n");
		return -1;
	}

	buffer_clone(&input, pinput);
	ehdr = &pelf->ehdr;
	elf_eident(&input, ehdr);
	bit64 = ehdr->e_ident[EI_CLASS] == ELFCLASS64;
	/* Assume LE unless we are sure otherwise.
	 * We're not going to take on the task of
	 * fully validating the ELF file. That way
	 * lies madness.
	 */
	if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB)
		xdr = &xdr_be;

	elf_ehdr(&input, ehdr, xdr, bit64);

	/* Relocation processing requires section header parsing. */
	if (flags & ELF_PARSE_RELOC)
		flags |= ELF_PARSE_SHDR;

	/* String table processing requires section header parsing. */
	if (flags & ELF_PARSE_STRTAB)
		flags |= ELF_PARSE_SHDR;

	/* Symbole table processing requires section header parsing. */
	if (flags & ELF_PARSE_SYMTAB)
		flags |= ELF_PARSE_SHDR;

	if ((flags & ELF_PARSE_PHDR) && phdr_read(pinput, pelf, xdr, bit64))
		goto fail;

	if ((flags & ELF_PARSE_SHDR) && shdr_read(pinput, pelf, xdr, bit64))
		goto fail;

	if ((flags & ELF_PARSE_RELOC) && reloc_read(pinput, pelf, xdr, bit64))
		goto fail;

	if ((flags & ELF_PARSE_STRTAB) && strtab_read(pinput, pelf))
		goto fail;