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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2010-10-25 16:10:35 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-10-25 16:10:19 +0200
commit36bf96801e3a2c4efae0bb8c1897a530fc9ca13e (patch)
treef509ae4845807edf2bf3c784ca5d26be1a12ca9b /arch/s390/mm
parent585b954e1f2fa325d425b0786e4525ac7c9ae575 (diff)
downloadlinux-linaro-android-36bf96801e3a2c4efae0bb8c1897a530fc9ca13e.tar.gz
[S390] fix SIGBUS handling
Raise SIGBUS with a siginfo structure. Deliver BUS_ADRERR as si_code and the address of the fault in the si_addr field. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
-rw-r--r--arch/s390/mm/fault.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index b49d12073f1..bae2c282221 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -212,14 +212,21 @@ static noinline void do_sigbus(struct pt_regs *regs, long int_code,
unsigned long trans_exc_code)
{
struct task_struct *tsk = current;
+ unsigned long address;
+ struct siginfo si;
/*
* Send a sigbus, regardless of whether we were in kernel
* or user mode.
*/
- tsk->thread.prot_addr = trans_exc_code & __FAIL_ADDR_MASK;
+ address = trans_exc_code & __FAIL_ADDR_MASK;
+ tsk->thread.prot_addr = address;
tsk->thread.trap_no = int_code;
- force_sig(SIGBUS, tsk);
+ si.si_signo = SIGBUS;
+ si.si_errno = 0;
+ si.si_code = BUS_ADRERR;
+ si.si_addr = (void __user *) address;
+ force_sig_info(SIGBUS, &si, tsk);
}
#ifdef CONFIG_S390_EXEC_PROTECT
@@ -279,10 +286,11 @@ static noinline void do_fault_error(struct pt_regs *regs, long int_code,
if (fault & VM_FAULT_OOM)
pagefault_out_of_memory();
else if (fault & VM_FAULT_SIGBUS) {
- do_sigbus(regs, int_code, trans_exc_code);
/* Kernel mode? Handle exceptions or die */
if (!(regs->psw.mask & PSW_MASK_PSTATE))
do_no_context(regs, int_code, trans_exc_code);
+ else
+ do_sigbus(regs, int_code, trans_exc_code);
} else
BUG();
break;