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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-04-29 15:28:48 +0300 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-05-14 14:37:07 +0300 |
| commit | 62b672c4ba90e726cc39b5c3d6dffd1ca817e143 (patch) | |
| tree | 897868b63b1b6ae04a48a9f002bf25e830fb1056 /arch/s390/include | |
| parent | be72ea09c1a5273abf8c6c52ef53e36c701cbf6a (diff) | |
| download | linux-62b672c4ba90e726cc39b5c3d6dffd1ca817e143.tar.xz | |
s390/stackstrace: Detect vdso stack frames
Clear the backchain of the extra stack frame added by the vdso user wrapper
code. This allows the user stack walker to detect and skip the non-standard
stack frame. Without this an incorrect instruction pointer would be added
to stack traces, and stack frame walking would be continued with a more or
less random back chain.
Fixes: aa44433ac4ee ("s390: add USER_STACKTRACE support")
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index db9982f0e8cd..bbbdc5abe2b2 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -98,6 +98,7 @@ void cpu_detect_mhz_feature(void); extern const struct seq_operations cpuinfo_op; extern void execve_tail(void); +unsigned long vdso_text_size(void); unsigned long vdso_size(void); /* |