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a64_emit_x64: Fix stack misalignment on Windows for 128-bit exclusive writes

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Discovered by @Subv.
Includes a test to ensure this codepath is exercised on Windows.
This commit is contained in:
MerryMage 2018-07-22 15:05:53 +01:00
parent 04b4c8b0cf
commit edd795e991
2 changed files with 41 additions and 2 deletions
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4
src/backend_x64/a64_emit_x64.cpp
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@ -896,7 +896,7 @@ void A64EmitX64::EmitExclusiveWrite(A64EmitContext& ctx, IR::Inst* inst, size_t
));
break;
case 128:
code.sub(rsp, 8 + 16 + ABI_SHADOW_SPACE);
code.sub(rsp, 16 + ABI_SHADOW_SPACE);
code.lea(code.ABI_PARAM3, ptr[rsp + ABI_SHADOW_SPACE]);
code.movaps(xword[code.ABI_PARAM3], xmm0);
code.CallFunction(static_cast<u32(*)(A64::UserConfig&, u64, A64::Vector&)>(
@ -906,7 +906,7 @@ void A64EmitX64::EmitExclusiveWrite(A64EmitContext& ctx, IR::Inst* inst, size_t
}) ? 0 : 1;
}
));
code.add(rsp, 8 + 16 + ABI_SHADOW_SPACE);
code.add(rsp, 16 + ABI_SHADOW_SPACE);
break;
default:
UNREACHABLE();