/**
* macho_file_map
*
* Copy all of the mach-o segments to the proper addresses.
*/
loader_return_t macho_file_map(loader_context_t * ctx, uint32_t loadaddr)
{
mach_header_t *mh = (mach_header_t *) ctx->source;
struct load_command *lc = (struct load_command *)((mach_header_t *) mh + 1);
uint32_t vmsize_count = 0;
uint32_t vm_bias = ctx->vm_bias;
for_each_lc(lc, mh) {
/* Only segments for mapping */
if (lc->cmd == kLoadCommandSegment) {
struct segment_command *sc = (struct segment_command *)lc;
uint32_t our_vmaddr;
/* Add up the vm size */
vmsize_count += sc->vmsize;
/* Get the load address */
our_vmaddr = sc->vmaddr - vm_bias;
/* Map the binary now */
if (sc->filesize) {
bcopy((void *)
add_ptr2(ctx->source, sc->fileoff),
(void *)add_ptr2(loadaddr, our_vmaddr), sc->filesize);
}
} else if (lc->cmd == kLoadCommandUnixThread) {
/* UnixThread has the entrypoint. */
thread_command_t *tc = (thread_command_t *) lc;
ctx->entry = tc->state.pc;
}
}
return kLoadSuccess;
}
static void *image3_reserve_data(uint32_t tag, uint32_t length)
{
uint32_t size, len;
Image3Header* header;
/* Make it even */
len = (uint32_t)round_up(length + sizeof(Image3Header), 2);
size = (uint32_t)round_up(image3core.rootHeader->header.size + len, 16);
/* Padding */
len += ((uint32_t)round_up(image3core.rootHeader->header.size + len, 16) -
(uint32_t)round_up(image3core.rootHeader->header.size + len, 2));
assert((image3core.rootHeader = realloc(image3core.rootHeader, size)));
header = (Image3Header*)add_ptr2(image3core.rootHeader, image3core.rootHeader->header.size);
bzero((void*)(header), len);
header->dataSize = length;
header->size = len;
header->magic = tag;
image3core.rootHeader->header.size = size;
image3core.rootHeader->header.dataSize += len;
return (void*)(header + 1);
}
/* This is to make sure the DATA is always at 0x40. */
static void *image3_reserve_type(uint32_t tag, uint32_t length)
{
uint32_t size, len;
Image3Header* header;
len = length + 28;
size = image3core.rootHeader->header.size + len;
assert((image3core.rootHeader = realloc(image3core.rootHeader, size)));
header = (Image3Header*)add_ptr2(image3core.rootHeader, image3core.rootHeader->header.size);
header->dataSize = length;
header->size = len;
header->magic = tag;
image3core.rootHeader->header.size = size;
image3core.rootHeader->header.dataSize += len;
return (void*)(header + 1);
}
