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authorBin Meng <bin.meng@windriver.com>2020-11-13 17:56:18 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2020-12-10 12:15:00 -0500
commitc2ba0515f2df58a661fcb5d6485139877d92ab1b (patch)
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parentc1bb5418e32ec70c72af332354b5963eab7a5579 (diff)
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target/i386: seg_helper: Correct segment selector nullification in the RET/IRET helper
Per the SDM, when returning to outer privilege level, for segment registers (ES, FS, GS, and DS) if the check fails, the segment selector becomes null, but QEMU clears the base/limit/flags as well as nullifying the segment selector, which should be a spec violation. Real hardware seems to be compliant with the spec, at least on one Coffee Lake board I tested. Signed-off-by: Bin Meng <bin.meng@windriver.com> Message-Id: <1605261378-77971-1-git-send-email-bmeng.cn@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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