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[Stable-8.2.1 34/38] target/hppa: Avoid accessing %gr0 when raising exce
From: |
Michael Tokarev |
Subject: |
[Stable-8.2.1 34/38] target/hppa: Avoid accessing %gr0 when raising exception |
Date: |
Thu, 18 Jan 2024 10:53:01 +0300 |
From: Helge Deller <deller@gmx.de>
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>
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;
--
2.39.2
- [Stable-8.2.1 24/38] tests/acpi: disallow tests/data/acpi/virt/SSDT.memhp changes, (continued)
- [Stable-8.2.1 24/38] tests/acpi: disallow tests/data/acpi/virt/SSDT.memhp changes, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 26/38] target/s390x: Fix LAE setting a wrong access register, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 25/38] tests/qtest/virtio-ccw: Fix device presence checking, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 27/38] .gitlab-ci.d/buildtest.yml: Work around htags bug when environment is large, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 28/38] readthodocs: fully specify a build environment, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 29/38] hw/hppa/machine: Allow up to 3840 MB total memory, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 30/38] hw/hppa/machine: Disable default devices with --nodefaults option, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 32/38] target/hppa: Fix PDC address translation on PA2.0 with PSW.W=0, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 31/38] hw/pci-host/astro: Add missing astro & elroy registers for NetBSD, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 33/38] hw/hppa: Move software power button address back into PDC, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 34/38] target/hppa: Avoid accessing %gr0 when raising exception,
Michael Tokarev <=
- [Stable-8.2.1 36/38] target/hppa: Fix IOR and ISR on unaligned access trap, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 35/38] target/hppa: Export function hppa_set_ior_and_isr(), Michael Tokarev, 2024/01/18
- [Stable-8.2.1 37/38] target/hppa: Fix IOR and ISR on error in probe, Michael Tokarev, 2024/01/18
- [Stable-8.2.1 38/38] target/hppa: Update SeaBIOS-hppa to version 15, Michael Tokarev, 2024/01/18