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Diffstat (limited to 'arch/sh/kernel/entry-common.S')
-rw-r--r--arch/sh/kernel/entry-common.S103
1 files changed, 47 insertions, 56 deletions
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index d62359cfbbe2..68d9223b145e 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -43,9 +43,10 @@
* syscall #
*
*/
+#include <asm/dwarf.h>
#if defined(CONFIG_PREEMPT)
-# define preempt_stop() cli
+# define preempt_stop() cli ; TRACE_IRQS_OFF
#else
# define preempt_stop()
# define resume_kernel __restore_all
@@ -55,11 +56,7 @@
.align 2
ENTRY(exception_error)
!
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 2f, r0
- jsr @r0
- nop
-#endif
+ TRACE_IRQS_ON
sti
mov.l 1f, r0
jmp @r0
@@ -67,18 +64,15 @@ ENTRY(exception_error)
.align 2
1: .long do_exception_error
-#ifdef CONFIG_TRACE_IRQFLAGS
-2: .long trace_hardirqs_on
-#endif
.align 2
ret_from_exception:
+ CFI_STARTPROC simple
+ CFI_DEF_CFA r14, 0
+ CFI_REL_OFFSET 17, 64
+ CFI_REL_OFFSET 15, 0
+ CFI_REL_OFFSET 14, 56
preempt_stop()
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 4f, r0
- jsr @r0
- nop
-#endif
ENTRY(ret_from_irq)
!
mov #OFF_SR, r0
@@ -93,6 +87,7 @@ ENTRY(ret_from_irq)
nop
ENTRY(resume_kernel)
cli
+ TRACE_IRQS_OFF
mov.l @(TI_PRE_COUNT,r8), r0 ! current_thread_info->preempt_count
tst r0, r0
bf noresched
@@ -103,8 +98,9 @@ need_resched:
mov #OFF_SR, r0
mov.l @(r0,r15), r0 ! get status register
- and #0xf0, r0 ! interrupts off (exception path)?
- cmp/eq #0xf0, r0
+ shlr r0
+ and #(0xf0>>1), r0 ! interrupts off (exception path)?
+ cmp/eq #(0xf0>>1), r0
bt noresched
mov.l 3f, r0
jsr @r0 ! call preempt_schedule_irq
@@ -125,13 +121,9 @@ noresched:
ENTRY(resume_userspace)
! r8: current_thread_info
cli
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 5f, r0
- jsr @r0
- nop
-#endif
+ TRACE_IRQS_OfF
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
- tst #_TIF_WORK_MASK, r0
+ tst #(_TIF_WORK_MASK & 0xff), r0
bt/s __restore_all
tst #_TIF_NEED_RESCHED, r0
@@ -156,14 +148,10 @@ work_resched:
jsr @r1 ! schedule
nop
cli
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 5f, r0
- jsr @r0
- nop
-#endif
+ TRACE_IRQS_OFF
!
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
- tst #_TIF_WORK_MASK, r0
+ tst #(_TIF_WORK_MASK & 0xff), r0
bt __restore_all
bra work_pending
tst #_TIF_NEED_RESCHED, r0
@@ -172,23 +160,15 @@ work_resched:
1: .long schedule
2: .long do_notify_resume
3: .long resume_userspace
-#ifdef CONFIG_TRACE_IRQFLAGS
-4: .long trace_hardirqs_on
-5: .long trace_hardirqs_off
-#endif
.align 2
syscall_exit_work:
! r0: current_thread_info->flags
! r8: current_thread_info
- tst #_TIF_WORK_SYSCALL_MASK, r0
+ tst #(_TIF_WORK_SYSCALL_MASK & 0xff), r0
bt/s work_pending
tst #_TIF_NEED_RESCHED, r0
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 5f, r0
- jsr @r0
- nop
-#endif
+ TRACE_IRQS_ON
sti
mov r15, r4
mov.l 8f, r0 ! do_syscall_trace_leave
@@ -226,12 +206,25 @@ syscall_trace_entry:
mov.l r0, @(OFF_R0,r15) ! Return value
__restore_all:
- mov.l 1f, r0
+ mov #OFF_SR, r0
+ mov.l @(r0,r15), r0 ! get status register
+
+ shlr2 r0
+ and #0x3c, r0
+ cmp/eq #0x3c, r0
+ bt 1f
+ TRACE_IRQS_ON
+ bra 2f
+ nop
+1:
+ TRACE_IRQS_OFF
+2:
+ mov.l 3f, r0
jmp @r0
nop
.align 2
-1: .long restore_all
+3: .long restore_all
.align 2
syscall_badsys: ! Bad syscall number
@@ -259,6 +252,7 @@ debug_trap:
nop
bra __restore_all
nop
+ CFI_ENDPROC
.align 2
1: .long debug_trap_table
@@ -304,6 +298,7 @@ ret_from_fork:
* system calls and debug traps through their respective jump tables.
*/
ENTRY(system_call)
+ setup_frame_reg
#if !defined(CONFIG_CPU_SH2)
mov.l 1f, r9
mov.l @r9, r8 ! Read from TRA (Trap Address) Register
@@ -321,18 +316,18 @@ ENTRY(system_call)
bt/s debug_trap ! it's a debug trap..
nop
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 5f, r10
- jsr @r10
- nop
-#endif
+ TRACE_IRQS_ON
sti
!
get_current_thread_info r8, r10
mov.l @(TI_FLAGS,r8), r8
- mov #_TIF_WORK_SYSCALL_MASK, r10
+ mov #(_TIF_WORK_SYSCALL_MASK & 0xff), r10
+ mov #(_TIF_WORK_SYSCALL_MASK >> 8), r9
tst r10, r8
+ shll8 r9
+ bf syscall_trace_entry
+ tst r9, r8
bf syscall_trace_entry
!
mov.l 2f, r8 ! Number of syscalls
@@ -351,15 +346,15 @@ syscall_call:
!
syscall_exit:
cli
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 6f, r0
- jsr @r0
- nop
-#endif
+ TRACE_IRQS_OFF
!
get_current_thread_info r8, r0
mov.l @(TI_FLAGS,r8), r0 ! current_thread_info->flags
- tst #_TIF_ALLWORK_MASK, r0
+ tst #(_TIF_ALLWORK_MASK & 0xff), r0
+ mov #(_TIF_ALLWORK_MASK >> 8), r1
+ bf syscall_exit_work
+ shlr8 r0
+ tst r0, r1
bf syscall_exit_work
bra __restore_all
nop
@@ -369,9 +364,5 @@ syscall_exit:
#endif
2: .long NR_syscalls
3: .long sys_call_table
-#ifdef CONFIG_TRACE_IRQFLAGS
-5: .long trace_hardirqs_on
-6: .long trace_hardirqs_off
-#endif
7: .long do_syscall_trace_enter
8: .long do_syscall_trace_leave