diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2024-01-02 10:06:17 +1100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-01-18 10:43:14 +0100 |
| commit | a58506b748b8988a95f4fa1a2420ac5c17038b30 (patch) | |
| tree | 4daced2875bac1086aa2050dc2e87e3d566de520 /hw/core/cpu-common.c | |
| parent | 3cbc17ee92479ff56d0d6afecc0def6f7ec01153 (diff) | |
| download | focaccia-qemu-a58506b748b8988a95f4fa1a2420ac5c17038b30.tar.gz focaccia-qemu-a58506b748b8988a95f4fa1a2420ac5c17038b30.zip | |
target/i386: Do not re-compute new pc with CF_PCREL
With PCREL, we have a page-relative view of EIP, and an
approximation of PC = EIP+CSBASE that is good enough to
detect page crossings. If we try to recompute PC after
masking EIP, we will mess up that approximation and write
a corrupt value to EIP.
We already handled masking properly for PCREL, so the
fix in b5e0d5d2 was only needed for the !PCREL path.
Cc: qemu-stable@nongnu.org
Fixes: b5e0d5d22fbf ("target/i386: Fix 32-bit wrapping of pc/eip computation")
Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240101230617.129349-1-richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/core/cpu-common.c')
0 files changed, 0 insertions, 0 deletions