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[PATCH v5 0/4] accel/tcg: Make sure that tb->size != 0 after translation
From: |
Ilya Leoshkevich |
Subject: |
[PATCH v5 0/4] accel/tcg: Make sure that tb->size != 0 after translation |
Date: |
Fri, 16 Apr 2021 17:49:35 +0200 |
If arch-specific code generates a translation block of size 0,
tb_gen_code() may generate a spurious exception.
Fix s390x (patch 1), ARM (patch 2) and xtensa (patch 3) and add an
assertion in order to catch such situations earlier (patch 4).
v1: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02037.html
v1 -> v2: Fix target/s390x instead of trying to tolerate tb->size == 0
in tb_gen_code().
v2: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02101.html
v2 -> v3: Split the common code change into a separate patch, add the
ARM patch in order to fix
https://gitlab.com/cohuck/qemu/-/jobs/1178409450
v3: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02332.html
v3 -> v4: Add the xtensa patch in order to fix
https://gitlab.com/cohuck/qemu/-/jobs/1178409540
v4: https://lists.nongnu.org/archive/html/qemu-devel/2021-04/msg02592.html
v4 -> v5: Handle thumb: the following C code triggers the assertion:
typedef void (*funcptr)(void);
int main() { funcptr f = (funcptr)0xffff0001; f(); }
Ilya Leoshkevich (4):
target/s390x: Fix translation exception on illegal instruction
target/arm: Make sure that commpage's tb->size != 0
target/xtensa: Make sure that tb->size != 0
accel/tcg: Assert that tb->size != 0 after translation
accel/tcg/translate-all.c | 1 +
target/arm/translate.c | 2 ++
target/s390x/translate.c | 16 +++++++++++-----
target/xtensa/translate.c | 3 +++
4 files changed, 17 insertions(+), 5 deletions(-)
--
2.29.2
- [PATCH v5 0/4] accel/tcg: Make sure that tb->size != 0 after translation,
Ilya Leoshkevich <=
- [PATCH v5 3/4] target/xtensa: Make sure that tb->size != 0, Ilya Leoshkevich, 2021/04/16
- [PATCH v5 2/4] target/arm: Make sure that commpage's tb->size != 0, Ilya Leoshkevich, 2021/04/16
- [PATCH v5 1/4] target/s390x: Fix translation exception on illegal instruction, Ilya Leoshkevich, 2021/04/16
- [PATCH v5 4/4] accel/tcg: Assert that tb->size != 0 after translation, Ilya Leoshkevich, 2021/04/16
- Re: [PATCH v5 0/4] accel/tcg: Make sure that tb->size != 0 after translation, Cornelia Huck, 2021/04/23
- Re: [PATCH v5 0/4] accel/tcg: Make sure that tb->size != 0 after translation, Cornelia Huck, 2021/04/26