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[x86/Linux] Port StubLinkerCPU::EmitSetup #8494

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Dec 7, 2016
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[x86/Linux] Port StubLinkerCPU::EmitSetup #8494

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9 changes: 4 additions & 5 deletions src/vm/i386/stublinkerx86.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2866,7 +2866,6 @@ VOID StubLinkerCPU::EmitSetup(CodeLabel *pForwardRef)
{
STANDARD_VM_CONTRACT;

#ifndef FEATURE_PAL
#ifdef FEATURE_IMPLICIT_TLS
DWORD idx = 0;
TLSACCESSMODE mode = TLSACCESS_GENERIC;
Expand All @@ -2889,13 +2888,17 @@ VOID StubLinkerCPU::EmitSetup(CodeLabel *pForwardRef)
switch (mode)
{
case TLSACCESS_WNT:
#ifndef FEATURE_PAL
{
unsigned __int32 tlsofs = offsetof(TEB, TlsSlots) + (idx * sizeof(void*));

static const BYTE code[] = {0x64,0x8b,0x1d}; // mov ebx, dword ptr fs:[IMM32]
EmitBytes(code, sizeof(code));
Emit32(tlsofs);
}
#else // !FEATURE_PAL
_ASSERTE("TLSACCESS_WNT mode is not supported");
#endif // !FEATURE_PAL
break;

case TLSACCESS_GENERIC:
Expand Down Expand Up @@ -2926,10 +2929,6 @@ VOID StubLinkerCPU::EmitSetup(CodeLabel *pForwardRef)
X86EmitDebugTrashReg(kECX);
X86EmitDebugTrashReg(kEDX);
#endif

#else // FEATURE_PAL
PORTABILITY_ASSERT("StubLinkerCPU::EmitSetup");
#endif // FEATURE_PAL
}

VOID StubLinkerCPU::EmitRareSetup(CodeLabel *pRejoinPoint, BOOL fThrow)
Expand Down