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Be pedantic about stack overflow on Linux and OS X.

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Add some magic to the fault handler to handle stack overflow due to BLR
optimization, and disable the optimization if fastmem is not enabled.
This commit is contained in:
comex
2014-09-15 23:03:07 -04:00
parent 755bd2c445
commit 7ad9027593
9 changed files with 174 additions and 23 deletions
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19
Source/Core/Common/MemoryUtil.cpp
View File

@ -158,6 +158,25 @@ void FreeAlignedMemory(void* ptr)
}
}
void ReadProtectMemory(void* ptr, size_t size)
{
bool error_occurred = false;
#ifdef _WIN32
DWORD oldValue;
if (!VirtualProtect(ptr, size, PAGE_NOACCESS, &oldValue))
error_occurred = true;
#else
int retval = mprotect(ptr, size, PROT_NONE);
if (retval != 0)
error_occurred = true;
#endif
if (error_occurred)
PanicAlert("ReadProtectMemory failed!\n%s", GetLastErrorMsg());
}
void WriteProtectMemory(void* ptr, size_t size, bool allowExecute)
{
bool error_occurred = false;

4
Source/Core/Common/MemoryUtil.h
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@ -12,8 +12,12 @@ void* AllocateMemoryPages(size_t size);
void FreeMemoryPages(void* ptr, size_t size);
void* AllocateAlignedMemory(size_t size,size_t alignment);
void FreeAlignedMemory(void* ptr);
void ReadProtectMemory(void* ptr, size_t size);
void WriteProtectMemory(void* ptr, size_t size, bool executable = false);
void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute = false);
std::string MemUsage();
void GuardMemoryMake(void* ptr, size_t size);
void GuardMemoryUnmake(void* ptr, size_t size);
inline int GetPageSize() { return 4096; }

2
Source/Core/Common/x64Emitter.cpp
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@ -1766,6 +1766,8 @@ void XEmitter::ANDN(int bits, X64Reg regOp1, X64Reg regOp2, OpArg arg) {WriteBMI
void XEmitter::LOCK() { Write8(0xF0); }
void XEmitter::REP() { Write8(0xF3); }
void XEmitter::REPNE() { Write8(0xF2); }
void XEmitter::FSOverride() { Write8(0x64); }
void XEmitter::GSOverride() { Write8(0x65); }
void XEmitter::FWAIT()
{

2
Source/Core/Common/x64Emitter.h
View File

@ -467,6 +467,8 @@ public:
void LOCK();
void REP();
void REPNE();
void FSOverride();
void GSOverride();
// x87
enum x87StatusWordBits {