diff options
Diffstat (limited to 'arch/s390/kernel/entry.S')
| -rw-r--r-- | arch/s390/kernel/entry.S | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 708cf9cf9a3..ed500ef799b 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -49,9 +49,9 @@ SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE -_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ +_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP ) -_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ +_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \ _TIF_MCCK_PENDING) STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER @@ -318,6 +318,8 @@ sysc_work: bo BASED(sysc_reschedule) tm __TI_flags+3(%r9),_TIF_SIGPENDING bnz BASED(sysc_sigpending) + tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME + bnz BASED(sysc_notify_resume) tm __TI_flags+3(%r9),_TIF_RESTART_SVC bo BASED(sysc_restart) tm __TI_flags+3(%r9),_TIF_SINGLE_STEP @@ -356,6 +358,16 @@ sysc_sigpending: b BASED(sysc_work_loop) # +# _TIF_NOTIFY_RESUME is set, call do_notify_resume +# +sysc_notify_resume: + la %r2,SP_PTREGS(%r15) # load pt_regs + l %r1,BASED(.Ldo_notify_resume) + la %r14,BASED(sysc_work_loop) + br %r1 # call do_notify_resume + + +# # _TIF_RESTART_SVC is set, set up registers and restart svc # sysc_restart: @@ -378,20 +390,21 @@ sysc_singlestep: br %r1 # branch to do_single_step # -# call trace before and after sys_call +# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before +# and after the system call # sysc_tracesys: - l %r1,BASED(.Ltrace) + l %r1,BASED(.Ltrace_entry) la %r2,SP_PTREGS(%r15) # load pt_regs la %r3,0 srl %r7,2 st %r7,SP_R2(%r15) basr %r14,%r1 - clc SP_R2(4,%r15),BASED(.Lnr_syscalls) + cl %r2,BASED(.Lnr_syscalls) bnl BASED(sysc_tracenogo) l %r8,BASED(.Lsysc_table) - l %r7,SP_R2(%r15) # strace might have changed the - sll %r7,2 # system call + lr %r7,%r2 + sll %r7,2 # *4 l %r8,0(%r7,%r8) sysc_tracego: lm %r3,%r6,SP_R3(%r15) @@ -401,9 +414,8 @@ sysc_tracego: sysc_tracenogo: tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT) bz BASED(sysc_return) - l %r1,BASED(.Ltrace) + l %r1,BASED(.Ltrace_exit) la %r2,SP_PTREGS(%r15) # load pt_regs - la %r3,1 la %r14,BASED(sysc_return) br %r1 @@ -666,6 +678,8 @@ io_work_loop: bo BASED(io_reschedule) tm __TI_flags+3(%r9),_TIF_SIGPENDING bnz BASED(io_sigpending) + tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME + bnz BASED(io_notify_resume) b BASED(io_restore) io_work_done: @@ -704,6 +718,19 @@ io_sigpending: TRACE_IRQS_OFF b BASED(io_work_loop) +# +# _TIF_SIGPENDING is set, call do_signal +# +io_notify_resume: + TRACE_IRQS_ON + stosm __SF_EMPTY(%r15),0x03 # reenable interrupts + la %r2,SP_PTREGS(%r15) # load pt_regs + l %r1,BASED(.Ldo_notify_resume) + basr %r14,%r1 # call do_signal + stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts + TRACE_IRQS_OFF + b BASED(io_work_loop) + /* * External interrupt handler routine */ @@ -1070,6 +1097,8 @@ cleanup_io_leave_insn: .Ldo_IRQ: .long do_IRQ .Ldo_extint: .long do_extint .Ldo_signal: .long do_signal +.Ldo_notify_resume: + .long do_notify_resume .Lhandle_per: .long do_single_step .Ldo_execve: .long do_execve .Lexecve_tail: .long execve_tail @@ -1079,7 +1108,8 @@ cleanup_io_leave_insn: .Lpreempt_schedule_irq: .long preempt_schedule_irq #endif -.Ltrace: .long syscall_trace +.Ltrace_entry: .long do_syscall_trace_enter +.Ltrace_exit: .long do_syscall_trace_exit .Lschedtail: .long schedule_tail .Lsysc_table: .long sys_call_table #ifdef CONFIG_TRACE_IRQFLAGS |