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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-09-27 15:24:38 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-09-30 13:04:40 +0200 |
| commit | dbbfe487e5f3fc00c9fe5207d63309859704d12f (patch) | |
| tree | afa7a57191434a8838f450986ca5a22b255990d7 /arch/s390/kernel/entry.S | |
| parent | 4d3b0664a0d0c0dc7501cfbd067f74226aeca510 (diff) | |
s390: fix system call restart after inferior call
Git commit 616498813b11ffef "s390: system call path micro optimization"
introduced a regression in regard to system call restarting and inferior
function calls via the ptrace interface. The pointer to the system call
table needs to be loaded in sysc_sigpending if do_signal returns with
TIF_SYSCALl set after it restored a system call context.
Cc: stable@vger.kernel.org # 3.10+
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 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index cc30d1fb000..0dc2b6d0a1e 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -266,6 +266,7 @@ sysc_sigpending: tm __TI_flags+3(%r12),_TIF_SYSCALL jno sysc_return lm %r2,%r7,__PT_R2(%r11) # load svc arguments + l %r10,__TI_sysc_table(%r12) # 31 bit system call table xr %r8,%r8 # svc 0 returns -ENOSYS clc __PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2) jnl sysc_nr_ok # invalid svc number -> do svc 0 |