mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
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48 lines
1.3 KiB
C
48 lines
1.3 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 "identify.h"
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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 bool apply_patch(const u8 *old, u32 old_size, const u8 *patch, u32 patch_size)
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{
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u8 *ptr = (u8*)0x93A00000;
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bool found = false;
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u8 *location = NULL;
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while((u32)ptr < 0x93B00000)
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{
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if(!memcmp(ptr, old, old_size))
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{
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found = true;
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location = ptr;
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u8 *start = location;
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u32 i;
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for(i = 0; i < patch_size; i++)
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{
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*location = patch[i];
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location++;
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}
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DCFlushRange((u8 *)(((u32)start) >> 5 << 5), (patch_size >> 5 << 5) + 64);
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break;
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}
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ptr++;
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}
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return found;
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}
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bool Patch_ISFS_Permission(bool enable)
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{
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if(enable)
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return apply_patch(isfs_permissions_old, sizeof(isfs_permissions_old),
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isfs_permissions_patch, sizeof(isfs_permissions_patch));
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else /* Just revert it */
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return apply_patch(isfs_permissions_patch, sizeof(isfs_permissions_patch),
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isfs_permissions_old, sizeof(isfs_permissions_old));
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}
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