| commit | db17d2cdb1a10e6fa8aa02de167546c17c893c3c | |
| author | Ilya Leoshkevich <iii@linux.ibm.com> | |
| Tue, 3 Aug 2021 22:16:06 +0000 (4 00:16 +0200) | ||
| committer | Richard Henderson <richard.henderson@linaro.org> | |
| Tue, 14 Sep 2021 19:00:21 +0000 (14 12:00 -0700) | ||
| tree | 44f4083e1a27650814c359fd07506363338399b4 | treesnapshot (tar.gz zip) |
| parent | 76d0042bb2a7601e7a343fd2ff02902658f8a97a | commitdiff |
accel/tcg/user-exec: Fix read-modify-write of code on s390 hosts
x86_64 dotnet/runtime uses cmpxchg for code patching. When running it
under s390x qemu-linux user, cpu_signal_handler() does not recognize
this as a write and does not restore PAGE_WRITE cleared by
tb_page_add(), incorrectly forwarding the signal to the guest code.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210803221606.150103-1-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
x86_64 dotnet/runtime uses cmpxchg for code patching. When running it
under s390x qemu-linux user, cpu_signal_handler() does not recognize
this as a write and does not restore PAGE_WRITE cleared by
tb_page_add(), incorrectly forwarding the signal to the guest code.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210803221606.150103-1-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| accel/tcg/user-exec.c | diffblobblamehistory |