Joshua Wise's Git repositories - netwatch.git/blame_incremental

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Commit	Line	Data
	1	#include <elf.h>
	2	#include <output.h>
	3	#include <minilib.h>
	4
	5	static const unsigned char elf_ident[4] = { 0x7F, 'E', 'L', 'F' };
	6
	7	int load_elf (char * buf, int size) {
	8
	9	Elf32_Ehdr * elf_hdr = (Elf32_Ehdr *) buf;
	10	Elf32_Shdr * elf_sec_hdrs = (Elf32_Shdr *) (buf + elf_hdr->e_shoff);
	11
	12	/* Sanity check on ELF file */
	13	if (memcmp((void )elf_hdr->e_ident, (void )elf_ident, sizeof(elf_ident))) return -1;
	14	if (elf_hdr->e_type != ET_EXEC) return -1;
	15	if (elf_hdr->e_machine != EM_386) return -1;
	16	if (elf_hdr->e_version != EV_CURRENT) return -1;
	17	if (size < sizeof(Elf32_Ehdr)) return -1;
	18	if (((char *)&elf_sec_hdrs[elf_hdr->e_shnum]) > (buf + size)) return -1;
	19
	20	char * string_table = buf + elf_sec_hdrs[elf_hdr->e_shstrndx].sh_offset;
	21
	22	if (string_table > (buf + size)) return -1;
	23
	24	int i;
	25	for (i = 0; i < elf_hdr->e_shnum; i++) {
	26
	27	if (elf_sec_hdrs[i].sh_name == SHN_UNDEF) {
	28	continue;
	29	}
	30
	31	char * section_name = string_table + elf_sec_hdrs[i].sh_name;
	32
	33	if ((elf_sec_hdrs[i].sh_type != SHT_PROGBITS) \|\| !(elf_sec_hdrs[i].sh_flags & SHF_ALLOC)) {
	34	outputf("Skipping %s", section_name);
	35	continue;
	36	}
	37
	38	outputf("Loading %s at %08x", section_name, elf_sec_hdrs[i].sh_addr);
	39
	40	memcpy((void *)elf_sec_hdrs[i].sh_addr,
	41	buf + elf_sec_hdrs[i].sh_offset,
	42	elf_sec_hdrs[i].sh_size);
	43	}
	44
	45	return 0;
	46	}