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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2010-05-17 10:00:05 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-05-17 10:00:15 +0200 |
| commit | 86f2552bbd0e17b19bb5e9881042533eaea553c7 (patch) | |
| tree | f520909d953f5d8c7db3dd4c4f2582bd7f7473aa /arch/s390/kernel/entry.S | |
| parent | cd3b70f5d4d82f85d1e1d6e822f38ae098cf7c72 (diff) | |
| download | op-kernel-dev-86f2552bbd0e17b19bb5e9881042533eaea553c7.zip op-kernel-dev-86f2552bbd0e17b19bb5e9881042533eaea553c7.tar.gz | |
[S390] add breaking event address for user space
Copy the last breaking event address from the lowcore to a new
field in the thread_struct on each system entry. Add a new
ptrace request PTRACE_GET_LAST_BREAK and a new utrace regset
REGSET_LAST_BREAK to query the last breaking event.
This is useful for debugging wild branches in user space code.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/entry.S')
| -rw-r--r-- | arch/s390/kernel/entry.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 0e2b162..d5e3e60 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -180,9 +180,9 @@ STACK_SIZE = 1 << STACK_SHIFT s %r15,BASED(.Lc_spsize) # make room for registers & psw mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2 - icm %r12,3,__LC_SVC_ILC + icm %r12,12,__LC_SVC_ILC stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack - st %r12,SP_SVCNR(%r15) + st %r12,SP_ILC(%r15) mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack la %r12,0 st %r12,__SF_BACKCHAIN(%r15) # clear back chain |
