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boot2 patch cleanup

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only patch boot2 when necessary.
if it is, lets not patch random crap.
This commit is contained in:
dhewg 2010-07-05 18:19:26 +02:00
parent 87c0f33221
commit f432ae5661
1 changed files with 33 additions and 21 deletions
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54
boot2.c
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@ -261,27 +261,15 @@ static u32 match[] = {
static u32 patch[] = {
0xBC024708,
0x10001,
0x4a4f4449,
0, // tid hi
0, // tid low
};
u32 boot2_run(u32 tid_hi, u32 tid_lo) {
u8 *ptr;
u32 i, num_matches=0;
ioshdr *hdr;
patch[1] = tid_hi;
patch[2] = tid_lo;
static u32 boot2_patch(ioshdr *hdr) {
u32 i, num_matches = 0;
u8 *ptr = (u8 *) hdr + hdr->hdrsize + hdr->loadersize;
gecko_printf("booting boot2 with title %08x-%08x\n", tid_hi, tid_lo);
mem_protect(1, (void *)0x11000000, (void *)0x13FFFFFF);
aes_reset();
aes_set_iv(boot2_iv);
aes_set_key(boot2_key);
aes_decrypt(boot2_content, (void *)0x11000000, boot2_content_size / 16, 0);
hdr = (ioshdr *)0x11000000;
ptr = (u8 *)0x11000000 + hdr->hdrsize + hdr->loadersize;
for (i = 0; i < sizeof(boot2); i += 1) {
for (i = 0; i < hdr->elfsize; i += 1) {
if (memcmp(ptr+i, match, sizeof(match)) == 0) {
num_matches++;
memcpy(ptr+i, patch, sizeof(patch));
@ -289,9 +277,33 @@ u32 boot2_run(u32 tid_hi, u32 tid_lo) {
}
}
if (num_matches != 1) {
gecko_printf("Wrong number of patches (matched %d times, expected 1), panicking\n", num_matches);
panic2(0, PANIC_PATCHFAIL);
return num_matches;
}
u32 boot2_run(u32 tid_hi, u32 tid_lo) {
u32 num_matches;
ioshdr *hdr;
gecko_printf("booting boot2 with title %08x-%08x\n", tid_hi, tid_lo);
mem_protect(1, (void *)0x11000000, (void *)0x13FFFFFF);
aes_reset();
aes_set_iv(boot2_iv);
aes_set_key(boot2_key);
aes_decrypt(boot2_content, (void *)0x11000000, boot2_content_size / 16, 0);
hdr = (ioshdr *) 0x11000000;
if ((tid_hi != match[1]) || (tid_lo != match[2])) {
patch[1] = tid_hi;
patch[2] = tid_lo;
num_matches = boot2_patch(hdr);
if (num_matches != 1) {
gecko_printf("Wrong number of patches (matched %d times, expected 1), panicking\n", num_matches);
panic2(0, PANIC_PATCHFAIL);
}
}
hdr->argument = 0x42;