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Added extra check to see if Sdk5DsiSdCardRedirectPatch can be applied

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This ensures an error is given in roms such as wrfu
This commit is contained in:
Gericom
2025-12-05 19:19:58 +01:00
parent e9a8c09a35
commit d12036e6a7
1 changed files with 9 additions and 2 deletions
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11
arm9/source/patches/arm7/sdk5/Sdk5DsiSdCardRedirectPatch.cpp
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@@ -6,6 +6,8 @@
static const u32 sAttachFunctionPattern[] = { 0xE92D4018u, 0xE24DDF5Du, 0xE24DDB01u, 0xE59FE050u };
static const u32 sAttachFunctionPatternThumb[] = { 0xB0FFB518u, 0xB0DFB0FFu, 0x4A0E490Du, 0x64CA4469u };
#define BL_TO_GET_DRIVE_STRUCT_OFFSET (-0x20)
bool Sdk5DsiSdCardRedirectPatch::FindPatchTarget(PatchContext& patchContext)
{
_attachFunction = patchContext.FindPattern32Twl(sAttachFunctionPattern, sizeof(sAttachFunctionPattern));
@@ -20,6 +22,11 @@ bool Sdk5DsiSdCardRedirectPatch::FindPatchTarget(PatchContext& patchContext)
if (_attachFunction)
{
LOG_DEBUG("Found FATFSi_sdmcRtfsAttach at %p\n", _attachFunction);
if (!_thumb && (*(u32*)((u8*)_attachFunction + BL_TO_GET_DRIVE_STRUCT_OFFSET) >> 24) != 0xEB)
{
LOG_WARNING("Unsupported arm7 version for SD redirection patches\n");
_attachFunction = nullptr;
}
}
else
{
@@ -50,11 +57,11 @@ void Sdk5DsiSdCardRedirectPatch::ApplyPatch(PatchContext& patchContext)
u32 getDriveStructAddress;
if (_thumb)
{
getDriveStructAddress = getThumbBlAddress((u32*)((u8*)_attachFunction - 0x20));
getDriveStructAddress = getThumbBlAddress((u32*)((u8*)_attachFunction + BL_TO_GET_DRIVE_STRUCT_OFFSET));
}
else
{
getDriveStructAddress = getArmBlAddress((u32*)((u8*)_attachFunction - 0x20));
getDriveStructAddress = getArmBlAddress((u32*)((u8*)_attachFunction + BL_TO_GET_DRIVE_STRUCT_OFFSET));
}
auto sdRead = patchContext.GetLoaderPlatform()->CreateSdReadPatchCode(