mirror of
https://github.com/fail0verflow/hbc.git
synced 2024-11-16 22:59:23 +01:00
110 lines
2.1 KiB
C
110 lines
2.1 KiB
C
#include "common.h"
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#include "string.h"
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#include "elf.h"
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#include "LzmaDec.h"
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extern const u8 __self_start[], __self_end[];
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extern const u8 __payload[];
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extern void _plunge(u32 entry);
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typedef struct {
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u8 * const data;
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const u32 len_in;
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const u32 len_out;
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const u8 props[LZMA_PROPS_SIZE];
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} __attribute__((packed)) _payload;
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const _payload * const payload = (void *) __payload;
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u8 * const code_buffer = (u8 *) 0x90100000;
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static void *lz_malloc(void *p, size_t size) {
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(void) p;
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(void) size;
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printf("lz_malloc %u\n", size);
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return (void *) 0x90081000;
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}
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static void lz_free(void *p, void *address) {
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(void) p;
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(void) address;
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printf("lz_free %p\n", address);
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}
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static const ISzAlloc lz_alloc = { lz_malloc, lz_free };
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static inline __attribute__((always_inline)) int decode(void) {
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SizeT len_in;
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SizeT len_out;
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ELzmaStatus status;
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SRes res;
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len_in = payload->len_in;
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len_out = payload->len_out;
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printf("in: %d out: %d\n", len_in, len_out);
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res = LzmaDecode(code_buffer, &len_out, payload->data, &len_in,
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payload->props, LZMA_PROPS_SIZE, LZMA_FINISH_END,
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&status, (ISzAlloc*)&lz_alloc);
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if (res != SZ_OK) {
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printf("decoding error %d (%u)\n", res, status);
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return res;
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}
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return 0;
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}
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void stubmain(void) {
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#ifndef NDEBUG
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exception_init();
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#endif
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// clear interrupt mask
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write32(0x0c003004, 0);
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#ifndef NDEBUG
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#ifndef DKPPC
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udelay(500 * 1000); // wait for mini - avoid EXI battle
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#endif
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gecko_init();
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#endif
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printf("hello world\n");
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printf("payload @%p blob @%p\n", payload, payload->data);
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if (decode() == 0 && valid_elf_image(code_buffer)) {
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printf("Valid ELF image detected.\n");
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u32 entry = load_elf_image(code_buffer);
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if (entry) {
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// Disable all IRQs; ack all pending IRQs.
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write32(0x0c003004, 0);
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write32(0x0c003000, 0xffffffff);
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printf("Branching to 0x%08x\n", entry);
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#ifndef DKPPC
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// detect failkit apps packed with the mini stub
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if (entry & 0xc0000000) {
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void (*ep)() = (void (*)()) entry;
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ep();
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} else {
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_plunge(entry);
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}
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#else
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void (*ep)() = (void (*)()) entry;
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ep();
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#endif
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}
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}
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error:
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blink();
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udelay(500000);
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goto error;
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}
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