int parse_lc(t_sym **sym_lst, t_sect **sect_lst, char *ptr, uint8_t mask)
{
int i;
int ncmds;
struct load_command *lc;
struct mach_header *header;
header = (struct mach_header *)ptr;
ncmds = IS_BE(mask) ? swap_uint32(header->ncmds) : header->ncmds;
swap_load_command(lc = ((void *)ptr +
(IS_ARCH_64(mask) ? sizeof(struct mach_header_64)
: sizeof(struct mach_header))), IS_BE(mask));
ncmds = IS_BE(mask) ? swap_uint32(header->ncmds) : header->ncmds;
i = 0;
while (i < ncmds)
{
if (lc->cmd == LC_SEGMENT_64 || lc->cmd == LC_SEGMENT)
add_sect_lst(lc, sect_lst, mask);
else if (lc->cmd == LC_SYMTAB)
if (add_symtab_lst((struct symtab_command *)lc,
ptr, sym_lst, mask) == -1)
return (EXIT_FAILURE);
swap_load_command(lc = (void *)lc + lc->cmdsize, IS_BE(mask));
i++;
}
return (0);
}
void dump_segment_commands(FILE *obj_file, int offset, int is_swap, uint32_t ncmds) {
int actual_offset = offset;
for (int i = 0; i < ncmds; i++) {
struct load_command *cmd = load_bytes(obj_file, actual_offset, sizeof(struct load_command));
if (is_swap) {
swap_load_command(cmd, 0);
}
if (cmd->cmd == LC_SEGMENT_64) {
struct segment_command_64 *segment = load_bytes(obj_file, actual_offset, sizeof(struct segment_command_64));
if (is_swap) {
swap_segment_command_64(segment, 0);
}
printf("segname: %s\n", segment->segname);
free(segment);
} else if (cmd->cmd == LC_SEGMENT) {
struct segment_command *segment = load_bytes(obj_file, actual_offset, sizeof(struct segment_command));
if (is_swap) {
swap_segment_command(segment, 0);
}
printf("segname: %s\n", segment->segname);
free(segment);
}
actual_offset += cmd->cmdsize;
free(cmd);
}
}
boolean_t macho_unswap_32(
u_char * file)
{
boolean_t result = FALSE;
enum NXByteOrder order = 0;
struct mach_header *hdr = (struct mach_header *) file;
struct load_command *lc = (struct load_command *) &hdr[1];
struct segment_command *seg = NULL;
u_long offset = 0;
u_int i = 0;
if (NXHostByteOrder() == NX_LittleEndian) {
order = NX_BigEndian;
} else {
order = NX_LittleEndian;
}
if (!hdr || hdr->magic != MH_MAGIC) goto finish;
offset = sizeof(*hdr);
for (i = 0; i < hdr->ncmds; ++i) {
lc = (struct load_command *) (file + offset);
offset += lc->cmdsize;
if (lc->cmd == LC_SEGMENT) {
seg = (struct segment_command *) lc;
swap_segment_command(seg, order);
} else {
swap_load_command(lc, order);
}
}
swap_mach_header(hdr, order);
result = TRUE;
finish:
return result;
}
boolean_t macho_swap_64(
u_char * file)
{
boolean_t result = FALSE;
struct mach_header_64 *hdr = (struct mach_header_64 *) file;
struct load_command *lc = (struct load_command *) &hdr[1];
struct segment_command_64 *seg = NULL;
u_long offset = 0;
u_int cmd = 0;
u_int cmdsize = 0;
u_int i = 0;
if (!hdr || hdr->magic != MH_CIGAM_64) goto finish;
swap_mach_header_64(hdr, NXHostByteOrder());
offset = sizeof(*hdr);
for (i = 0; i < hdr->ncmds; ++i) {
lc = (struct load_command *) (file + offset);
cmd = OSSwapInt32(lc->cmd);
cmdsize = OSSwapInt32(lc->cmdsize);
offset += cmdsize;
if (cmd == LC_SEGMENT_64) {
seg = (struct segment_command_64 *) lc;
swap_segment_command_64(seg, NXHostByteOrder());
} else {
swap_load_command(lc, NXHostByteOrder());
}
}
result = TRUE;
finish:
return result;
}
