diff options
| author | Helge Deller <deller@gmx.de> | 2024-01-03 20:35:18 +0100 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2024-01-17 10:32:47 +0300 |
| commit | 27cdd0ce471a6d49dd898d2c619f5f13b498daff (patch) | |
| tree | f0f58dfc1b4f7109c2eb244d8a03eb870901addf /target | |
| parent | 0f5fb24fd760bf0e693d32c6d5d7b22f035a771d (diff) | |
target/hppa: Avoid accessing %gr0 when raising exception
The value of unwind_breg may reference register %r0, but we need to avoid
accessing gr0 directly and use the value 0 instead.
At runtime I've seen unwind_breg being zero with the Linux kernel when
rfi is used to jump to smp_callin().
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Bruno Haible <bruno@clisp.org>
(cherry picked from commit 5915b67013eb8c3a84e3ef05e6ba4eae55ccd173)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Diffstat (limited to 'target')
| -rw-r--r-- | target/hppa/mem_helper.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target/hppa/mem_helper.c b/target/hppa/mem_helper.c index 4c28c58ee9..1387f4a64b 100644 --- a/target/hppa/mem_helper.c +++ b/target/hppa/mem_helper.c @@ -341,7 +341,7 @@ raise_exception_with_ior(CPUHPPAState *env, int excp, uintptr_t retaddr, cpu_restore_state(cs, retaddr); - b = env->gr[env->unwind_breg]; + b = env->unwind_breg ? env->gr[env->unwind_breg] : 0; b >>= (env->psw & PSW_W ? 62 : 30); env->cr[CR_IOR] |= b << 62; |