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https://github.com/FEX-Emu/FEX.git
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Ryan Houdek
543a435b9f
Showcases the bug that #5192 fixed. This would have failed prior to that PR's change.
39 lines
833 B
NASM
39 lines
833 B
NASM
%ifdef CONFIG
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{
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"RegData": {
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"RAX": "0x0000000000011000",
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"RCX": "0x0000000051529654",
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"RDX": "0x0000000061626303"
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},
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"Mode": "32BIT"
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}
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%endif
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; FEX-Emu had a bug with its `TelemetrySetValue` IR operation where it would corrupt host flags at an inopportune time.
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; The IR operation does `cmp+cset`, but even with `ImplicitFlagClobber` set, this happened at a invalid time for flag handling.
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; To test this:
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; - btr -> Sets CF
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; - adc with `ss:` -> Adds to register with carry, but `ss:` causes `TelemetrySetValue`.
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; - Host flags are corrupted after the `TelemetrySetValue`, before the `adc` was able to operate.
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mov ecx, 0x51525354
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mov edx, 0x61626303
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lea eax, [.data]
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lea esp, [.data_flags]
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popf
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and word [eax], dx
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btr cx, dx
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adc cx, ss:[eax]
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hlt
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align 4096
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.data:
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dd 0x41424344
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.data_flags:
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dd 0xfeff
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