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Change OC_STRING_ASSIGN_N macro to function to fix a side effect.

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This commit is contained in:
jief666 2021-09-25 13:25:02 +03:00
parent 9d7d7b6059
commit e6c194d1b9
2 changed files with 39 additions and 18 deletions
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49
rEFIt_UEFI/include/OC.h
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@ -103,20 +103,41 @@ OcMain (
} // extern "C"
#endif
#define OC_STRING_ASSIGN_N(ocString, value, len) do { \
if( len >= sizeof(ocString.Value) ) { \
memset(ocString.Value, 0, sizeof(ocString.Value)); \
ocString.DynValue = (__typeof__(ocString.DynValue))malloc(len); \
memcpy(ocString.DynValue, value, len); \
ocString.MaxSize = (UINT32)len; \
ocString.Size = (UINT32)len; /* unsafe cast */ \
}else{ \
ocString.DynValue = NULL; \
memcpy(ocString.Value, value, len); \
ocString.MaxSize = sizeof(ocString.Value); \
ocString.Size = (UINT32)len; /* unsafe cast */ \
} \
} while (0)
// This was a macro.
// But there is a catch : if parameter value depends on ocString.DynValue, DynValue is wiped before value is evaluated.
// Solution could have been an intermediary variable.
inline void OC_DATA_ASSIGN_N(OC_DATA& ocString, const unsigned char* value, size_t len) {
if( len >= sizeof(ocString.Value) ) {
memset(ocString.Value, 0, sizeof(ocString.Value));
ocString.DynValue = (__typeof__(ocString.DynValue))malloc(len);
memcpy(ocString.DynValue, value, len);
ocString.MaxSize = (UINT32)len;
ocString.Size = (UINT32)len; /* unsafe cast */
}else{
ocString.DynValue = NULL;
memcpy(ocString.Value, value, len);
ocString.MaxSize = sizeof(ocString.Value);
ocString.Size = (UINT32)len; /* unsafe cast */
}
}
// This was a macro.
// But there is a catch : if parameter value depends on ocString.DynValue, DynValue is wiped before value is evaluated.
// Solution could have been an intermediary variable.
inline void OC_STRING_ASSIGN_N(OC_STRING& ocString, const char* value, size_t len) {
if( len >= sizeof(ocString.Value) ) {
memset(ocString.Value, 0, sizeof(ocString.Value));
ocString.DynValue = (__typeof__(ocString.DynValue))malloc(len);
memcpy(ocString.DynValue, value, len);
ocString.MaxSize = (UINT32)len;
ocString.Size = (UINT32)len; /* unsafe cast */
}else{
ocString.DynValue = NULL;
memcpy(ocString.Value, value, len);
ocString.MaxSize = sizeof(ocString.Value);
ocString.Size = (UINT32)len; /* unsafe cast */
}
}
#define OC_STRING_ASSIGN(ocString, value) OC_STRING_ASSIGN_N(ocString, value, strlen(value)+1)

8
rEFIt_UEFI/refit/main.cpp
View File

@ -739,14 +739,14 @@ void LOADER_ENTRY::DelegateKernelPatches()
mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Count = (UINT32)kextPatch.Count;
mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Enabled = 1;
OC_STRING_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Find, kextPatch.Find.data(), kextPatch.Find.size());
OC_DATA_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Find, kextPatch.Find.data(), kextPatch.Find.size());
OC_STRING_ASSIGN(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Identifier, kextPatch.getName().c_str());
mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Limit = (UINT32)kextPatch.SearchLen;
OC_STRING_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Mask, kextPatch.MaskFind.vdata(), kextPatch.MaskFind.size());
OC_DATA_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Mask, kextPatch.MaskFind.data(), kextPatch.MaskFind.size());
OC_STRING_ASSIGN(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->MaxKernel, ""); // it has been filtered, so we don't need to set Min and MaxKernel
OC_STRING_ASSIGN(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->MinKernel, "");
OC_STRING_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Replace, kextPatch.Replace.vdata(), kextPatch.Replace.size());
OC_STRING_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->ReplaceMask, kextPatch.MaskReplace.vdata(), kextPatch.MaskReplace.size());
OC_DATA_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Replace, kextPatch.Replace.data(), kextPatch.Replace.size());
OC_DATA_ASSIGN_N(mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->ReplaceMask, kextPatch.MaskReplace.data(), kextPatch.MaskReplace.size());
mOpenCoreConfiguration.Kernel.Patch.Values[kextPatchIdx]->Skip = (UINT32)kextPatch.Skip;
#ifdef JIEF_DEBUG
if ( kextPatch.Label == "algrey - cpuid_set_info - ryzen cores and logicals count - part 3 - 10.14"_XS8 ) {