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authorHeiko Carstens <heiko.carstens@de.ibm.com>2006-09-20 15:59:22 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-09-20 15:59:22 +0200
commit9514e2311be97a01e8669c4de78e9fea37489f09 (patch)
tree74a256ce4ab6a94c904635f47862f8f3e3ec7974
parent6981e936aa156c747bb3e6aea414bba673457115 (diff)
[S390] Kernel stack overflow handling.
Substract the size of the initial stack frame from the correct register. Otherwise we will end up in a program check loop. Fix the offset into the save area as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/kernel/entry64.S4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 8b956d1538f..29bbfbab733 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -827,7 +827,7 @@ restart_go:
*/
stack_overflow:
lg %r15,__LC_PANIC_STACK # change to panic stack
- aghi %r1,-SP_SIZE
+ aghi %r15,-SP_SIZE
mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
la %r1,__LC_SAVE_AREA
@@ -835,7 +835,7 @@ stack_overflow:
je 0f
chi %r12,__LC_PGM_OLD_PSW
je 0f
- la %r1,__LC_SAVE_AREA+16
+ la %r1,__LC_SAVE_AREA+32
0: mvc SP_R12(32,%r15),0(%r1) # move %r12-%r15 to stack
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # clear back chain
la %r2,SP_PTREGS(%r15) # load pt_regs