xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[S390] fix kprobes single stepping

Browse Source 
Fix kprobes after git commit 1e54622e04
broke it. The kprobe_handler is now called with interrupts in the state
at the time of the breakpoint. The single step of the replaced instruction
is done with interrupts off which makes it necessary to enable and disable
the interupts in the kprobes code.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2010-10-29 16:50:45 +02:00
committed by Martin Schwidefsky
parent f2166bb117
commit 9ec2708053
3 changed files with 10 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/s390/kernel/entry.S
View File

@@ -557,6 +557,7 @@ pgm_svcper:
# per was called from kernel, must be kprobes
#
kernel_per:
REENABLE_IRQS
mvi SP_SVCNR(%r15),0xff # set trap indication to pgm check
mvi SP_SVCNR+1(%r15),0xff
la %r2,SP_PTREGS(%r15) # address of register-save area