summaryrefslogtreecommitdiffstats
path: root/arch/parisc/kernel
diff options
context:
space:
mode:
authorHelge Deller <deller@gmx.de>2022-07-01 09:00:41 +0200
committerHelge Deller <deller@gmx.de>2022-07-02 18:36:58 +0200
commitaa78fa905b4431c432071a878da99c2b37fc0e79 (patch)
tree9affce84175326091726f1545a52b3342de4e342 /arch/parisc/kernel
parent96b80fcd2705fc50ebe1f7f3ce204e861b3099ab (diff)
downloadlinux-aa78fa905b4431c432071a878da99c2b37fc0e79.tar.bz2
parisc: Fix vDSO signal breakage on 32-bit kernel
Addition of vDSO support for parisc in kernel v5.18 suddenly broke glibc signal testcases on a 32-bit kernel. The trampoline code (sigtramp.S) which is mapped into userspace includes an offset to the context data on the stack, which is used by gdb and glibc to get access to registers. In a 32-bit kernel we used by mistake the offset into the compat context (which is valid on a 64-bit kernel only) instead of the offset into the "native" 32-bit context. Reported-by: John David Anglin <dave.anglin@bell.net> Tested-by: John David Anglin <dave.anglin@bell.net> Fixes: df24e1783e6e ("parisc: Add vDSO support") CC: stable@vger.kernel.org # 5.18 Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/kernel')
-rw-r--r--arch/parisc/kernel/asm-offsets.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/parisc/kernel/asm-offsets.c b/arch/parisc/kernel/asm-offsets.c
index 2673d57eeb00..94652e13c260 100644
--- a/arch/parisc/kernel/asm-offsets.c
+++ b/arch/parisc/kernel/asm-offsets.c
@@ -224,8 +224,13 @@ int main(void)
BLANK();
DEFINE(ASM_SIGFRAME_SIZE, PARISC_RT_SIGFRAME_SIZE);
DEFINE(SIGFRAME_CONTEXT_REGS, offsetof(struct rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE);
+#ifdef CONFIG_64BIT
DEFINE(ASM_SIGFRAME_SIZE32, PARISC_RT_SIGFRAME_SIZE32);
DEFINE(SIGFRAME_CONTEXT_REGS32, offsetof(struct compat_rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE32);
+#else
+ DEFINE(ASM_SIGFRAME_SIZE32, PARISC_RT_SIGFRAME_SIZE);
+ DEFINE(SIGFRAME_CONTEXT_REGS32, offsetof(struct rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE);
+#endif
BLANK();
DEFINE(ICACHE_BASE, offsetof(struct pdc_cache_info, ic_base));
DEFINE(ICACHE_STRIDE, offsetof(struct pdc_cache_info, ic_stride));