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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-04-29 15:28:47 +0300 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-05-14 14:37:07 +0300 |
| commit | be72ea09c1a5273abf8c6c52ef53e36c701cbf6a (patch) | |
| tree | 91b96d1e0662af8fdff21cffeaf8d8ab11d6291e /arch/s390/kernel/asm-offsets.c | |
| parent | cd58109283944ea8bdcd0a8211a86cbd2450716a (diff) | |
| download | linux-be72ea09c1a5273abf8c6c52ef53e36c701cbf6a.tar.xz | |
s390/vdso: Introduce and use struct stack_frame_vdso_wrapper
Introduce and use struct stack_frame_vdso_wrapper within vdso user wrapper
code. With this structure it is possible to automatically generate an
asm-offset define which can be used to save and restore the return address
of the calling function.
Also use STACK_FRAME_USER_OVERHEAD instead of STACK_FRAME_OVERHEAD to
document that the code works with user space stack frames with the standard
stack frame layout.
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/kernel/asm-offsets.c')
| -rw-r--r-- | arch/s390/kernel/asm-offsets.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index fa5f6885c74a..28017c418442 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -66,6 +66,10 @@ int main(void) OFFSET(__SF_SIE_CONTROL_PHYS, stack_frame, sie_control_block_phys); DEFINE(STACK_FRAME_OVERHEAD, sizeof(struct stack_frame)); BLANK(); + DEFINE(STACK_FRAME_USER_OVERHEAD, sizeof(struct stack_frame_user)); + OFFSET(__SFVDSO_RETURN_ADDRESS, stack_frame_vdso_wrapper, return_address); + DEFINE(STACK_FRAME_VDSO_OVERHEAD, sizeof(struct stack_frame_vdso_wrapper)); + BLANK(); /* idle data offsets */ OFFSET(__CLOCK_IDLE_ENTER, s390_idle_data, clock_idle_enter); OFFSET(__TIMER_IDLE_ENTER, s390_idle_data, timer_idle_enter); |