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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:48 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:43 +0100
commitccf45cafb0805978e6f13a672caca0e536e87cad (patch)
treef4abcadaf691ee952527ad434db3ab91b6e46e7f /arch/s390/mm
parent20b40a794baf3b4b0320c0a77ce944d5d1a01f25 (diff)
downloadlinux-linaro-stable-ccf45cafb0805978e6f13a672caca0e536e87cad.tar.gz
[S390] addressing mode limits and psw address wrapping
An instruction with an address right below the adress limit for the current addressing mode will wrap. The instruction restart logic in the protection fault handler and the signal code need to follow the wrapping rules to find the correct instruction address. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
-rw-r--r--arch/s390/mm/fault.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 9564fc779b27..a90fd91a9c72 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -393,7 +393,7 @@ void __kprobes do_protection_exception(struct pt_regs *regs, long pgm_int_code,
int fault;
/* Protection exception is suppressing, decrement psw address. */
- regs->psw.addr -= (pgm_int_code >> 16);
+ regs->psw.addr = __rewind_psw(regs->psw, pgm_int_code >> 16);
/*
* Check for low-address protection. This needs to be treated
* as a special case because the translation exception code