mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-11-01 09:05:06 +01:00
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
|
|
/* Code from postloader - thanks to stfour */
|
|
|
|
#include <gccore.h>
|
|
#include <ogc/machine/processor.h>
|
|
#include <string.h>
|
|
|
|
#include "gecko/gecko.hpp"
|
|
#include "memory/memory.h"
|
|
#include "identify.h"
|
|
|
|
static bool apply_patch(char *name, const u8 *old, u32 old_size, const u8 *patch, u32 patch_size, u32 patch_offset)
|
|
{
|
|
u8 *ptr = (u8*)0x93400000;
|
|
bool found = false;
|
|
u8 *location = NULL;
|
|
while((u32)ptr < (0x94000000 - patch_size))
|
|
{
|
|
if(memcmp(ptr, old, old_size) == 0)
|
|
{
|
|
found = true;
|
|
location = ptr + patch_offset;
|
|
u8 *start = location;
|
|
u32 i;
|
|
for(i = 0; i < patch_size; i++)
|
|
{
|
|
*location = patch[i];
|
|
location++;
|
|
}
|
|
DCFlushRange((u8 *)(((u32)start) >> 5 << 5), (patch_size >> 5 << 5) + 64);
|
|
break;
|
|
}
|
|
ptr++;
|
|
}
|
|
if(found)
|
|
gprintf("apply_patch '%s': found at %08x\n", name, ptr);
|
|
else
|
|
gprintf("apply_patch '%s': not found\n", name);
|
|
return found;
|
|
}
|
|
|
|
const u8 isfs_permissions_old[] = { 0x42, 0x8B, 0xD0, 0x01, 0x25, 0x66 };
|
|
const u8 isfs_permissions_patch[] = { 0x42, 0x8B, 0xE0, 0x01, 0x25, 0x66 };
|
|
static const u8 setuid_old[] = { 0xD1, 0x2A, 0x1C, 0x39 };
|
|
static const u8 setuid_patch[] = { 0x46, 0xC0 };
|
|
const u8 es_identify_old[] = { 0x28, 0x03, 0xD1, 0x23 };
|
|
const u8 es_identify_patch[] = { 0x00, 0x00 };
|
|
const u8 hash_old[] = { 0x20, 0x07, 0x23, 0xA2 };
|
|
const u8 hash_patch[] = { 0x00 };
|
|
const u8 new_hash_old[] = { 0x20, 0x07, 0x4B, 0x0B };
|
|
|
|
bool Patch_ISFS_Permission(bool enable)
|
|
{
|
|
/* Disable memory protection */
|
|
write16(MEM_PROT, 0);
|
|
/* Do Patches */
|
|
bool ret = false;
|
|
if(enable)
|
|
{
|
|
gprintf("Enabling ISFS Patches...\n");
|
|
ret = apply_patch("isfs_permissions", isfs_permissions_old, sizeof(isfs_permissions_old), isfs_permissions_patch, sizeof(isfs_permissions_patch), 0);
|
|
}
|
|
else /* Just revert it */
|
|
{
|
|
gprintf("Disabling ISFS Patches...\n");
|
|
ret = apply_patch("isfs_permissions", isfs_permissions_patch, sizeof(isfs_permissions_patch), isfs_permissions_old, sizeof(isfs_permissions_old), 0);
|
|
}
|
|
/* Enable memory protection */
|
|
write16(MEM_PROT, 1);
|
|
return ret;
|
|
}
|
|
|
|
void Patch_Channel_Boot(void)
|
|
{
|
|
/* Disable memory protection */
|
|
write16(MEM_PROT, 0);
|
|
/* Do Patching */
|
|
apply_patch("es_setuid", setuid_old, sizeof(setuid_old), setuid_patch, sizeof(setuid_patch), 0);
|
|
apply_patch("es_identify", es_identify_old, sizeof(es_identify_old), es_identify_patch, sizeof(es_identify_patch), 2);
|
|
apply_patch("hash_check", hash_old, sizeof(hash_old), hash_patch, sizeof(hash_patch), 1);
|
|
apply_patch("new_hash_check", new_hash_old, sizeof(new_hash_old), hash_patch, sizeof(hash_patch), 1);
|
|
/* Enable memory protection */
|
|
write16(MEM_PROT, 1);
|
|
}
|