mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-11-30 15:14:18 +01:00
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
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/* Code from postloader - thanks to stfour */
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#include <gccore.h>
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#include <ogc/machine/processor.h>
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#include <string.h>
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#include "gecko/gecko.hpp"
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#include "memory/memory.h"
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#include "identify.h"
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static bool apply_patch(char *name, const u8 *old, u32 old_size, const u8 *patch, u32 patch_size, u32 patch_offset)
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{
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u8 *ptr = (u8*)0x93400000;
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bool found = false;
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u8 *location = NULL;
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while((u32)ptr < (0x94000000 - patch_size))
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{
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if(memcmp(ptr, old, old_size) == 0)
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{
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found = true;
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location = ptr + patch_offset;
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u32 i;
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for(i = 0; i < patch_size; i++)
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location[i] = patch[i];
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DCFlushRange(location, patch_size);
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break;
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}
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ptr++;
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}
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if(found)
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gprintf("apply_patch '%s': found at %08x\n", name, ptr);
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else
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gprintf("apply_patch '%s': not found\n", name);
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return found;
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}
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const u8 isfs_permissions_old[] = { 0x42, 0x8B, 0xD0, 0x01, 0x25, 0x66 };
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const u8 isfs_permissions_patch[] = { 0x42, 0x8B, 0xE0, 0x01, 0x25, 0x66 };
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static const u8 setuid_old[] = { 0xD1, 0x2A, 0x1C, 0x39 };
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static const u8 setuid_patch[] = { 0x46, 0xC0 };
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const u8 es_identify_old[] = { 0x28, 0x03, 0xD1, 0x23 };
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const u8 es_identify_patch[] = { 0x00, 0x00 };
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const u8 hash_old[] = { 0x20, 0x07, 0x23, 0xA2 };
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const u8 hash_patch[] = { 0x00 };
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const u8 new_hash_old[] = { 0x20, 0x07, 0x4B, 0x0B };
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bool Patch_ISFS_Permission(bool enable)
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{
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/* Disable memory protection */
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write16(MEM_PROT, 0);
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/* Do Patches */
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bool ret = false;
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if(enable)
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{
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gprintf("Enabling ISFS Patches...\n");
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ret = apply_patch("isfs_permissions", isfs_permissions_old, sizeof(isfs_permissions_old), isfs_permissions_patch, sizeof(isfs_permissions_patch), 0);
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}
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else /* Just revert it */
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{
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gprintf("Disabling ISFS Patches...\n");
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ret = apply_patch("isfs_permissions", isfs_permissions_patch, sizeof(isfs_permissions_patch), isfs_permissions_old, sizeof(isfs_permissions_old), 0);
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}
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/* Enable memory protection */
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write16(MEM_PROT, 1);
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return ret;
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}
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void Patch_Channel_Boot(void)
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{
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/* Disable memory protection */
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write16(MEM_PROT, 0);
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/* Do Patching */
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apply_patch("es_setuid", setuid_old, sizeof(setuid_old), setuid_patch, sizeof(setuid_patch), 0);
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apply_patch("es_identify", es_identify_old, sizeof(es_identify_old), es_identify_patch, sizeof(es_identify_patch), 2);
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apply_patch("hash_check", hash_old, sizeof(hash_old), hash_patch, sizeof(hash_patch), 1);
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apply_patch("new_hash_check", new_hash_old, sizeof(new_hash_old), hash_patch, sizeof(hash_patch), 1);
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/* Enable memory protection */
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write16(MEM_PROT, 1);
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}
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