mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-12-25 19:31:58 +01:00
63 lines
1.9 KiB
C
63 lines
1.9 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 <unistd.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 inline bool apply_patch(char *name, const u8 *old, const u8 *patch, u32 size)
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{
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u8 i;
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u32 found = 0;
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u8 *ptr = (u8*)IOS_Patch_Start;
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u32 level = IRQ_Disable();
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while((u32)ptr < (u32)IOS_Patch_End)
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{
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if(memcmp(ptr, old, size) == 0)
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{
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for(i = 0; i < size; ++i)
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*(vu8*)(ptr+i) = *(vu8*)(patch+i);
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found++;
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}
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ptr++;
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}
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IRQ_Restore(level);
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gprintf("patched %s %u times.\n", name, found);
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return (found > 0);
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}
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static const u8 isfs_perm_old[] = { 0x42, 0x8B, 0xD0, 0x01, 0x25, 0x66 };
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static const u8 isfs_perm_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, 0x1C, 0x39 };
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static const u8 es_identify_old[] = { 0x28, 0x03, 0xD1, 0x23 };
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static const u8 es_identify_patch[] = { 0x28, 0x03, 0x00, 0x00 };
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static const u8 hash_old[] = { 0x20, 0x07, 0x23, 0xA2 };
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static const u8 hash_patch[] = { 0x20, 0x00, 0x23, 0xA2 };
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static const u8 new_hash_old[] = { 0x20, 0x07, 0x4B, 0x0B };
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static const u8 new_hash_patch[] = { 0x20, 0x00, 0x4B, 0x0B };
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void PatchIOS(bool patch_all)
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{
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__ES_Close();
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write16(MEM_PROT, 0);
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/* Do Patching */
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apply_patch("isfs_permissions", isfs_perm_old, isfs_perm_patch, sizeof(isfs_perm_patch));
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if(patch_all)
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{
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apply_patch("es_setuid", setuid_old, setuid_patch, sizeof(setuid_patch));
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apply_patch("es_identify", es_identify_old, es_identify_patch, sizeof(es_identify_patch));
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apply_patch("hash_check", hash_old, hash_patch, sizeof(hash_patch));
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apply_patch("new_hash_check", new_hash_old, new_hash_patch, sizeof(new_hash_patch));
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}
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/* Reinit */
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write16(MEM_PROT, 1);
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__ES_Init();
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}
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