s390/kprobes: add support for compare and branch instructions

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The compare and branch instructions (not relative) all need special
handling when kprobed:
- if a branch was taken, the instruction pointer should be left alone
- if a branch was not taken, the instruction pointer must be adjusted

The compare and branch instructions family was introduced with the general
instruction extension facility (z10).

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Heiko Carstens 2013-08-01 10:16:27 +02:00 • committed by Martin Schwidefsky

parent bee5c2863e

commit 6b169ac9b4

1 changed files with 19 additions and 2 deletions

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arch/s390/kernel/kprobes.c

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