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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2010-05-17 10:00:05 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-05-17 10:00:15 +0200
commit86f2552bbd0e17b19bb5e9881042533eaea553c7 (patch)
treef520909d953f5d8c7db3dd4c4f2582bd7f7473aa /arch/s390/kernel/entry.S
parentcd3b70f5d4d82f85d1e1d6e822f38ae098cf7c72 (diff)
downloadop-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.S4
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
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