-/* $Id: entry.S,v 1.37 2004/06/11 13:02:46 doyu Exp $
- *
- * linux/arch/sh/entry.S
- *
+/*
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
- * Copyright (C) 2003 Paul Mundt
+ * Copyright (C) 2003 - 2008 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* 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
.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
.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
bra resume_userspace
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
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 1f, r0
- mov.l r0, @(TI_PRE_COUNT,r8)
-
-#ifdef CONFIG_TRACE_IRQFLAGS
mov.l 3f, r0
- jsr @r0
- nop
-#endif
- sti
- mov.l 2f, r0
- jsr @r0
- nop
- mov #0, r0
- mov.l r0, @(TI_PRE_COUNT,r8)
- cli
-#ifdef CONFIG_TRACE_IRQFLAGS
- mov.l 4f, r0
- jsr @r0
+ jsr @r0 ! call preempt_schedule_irq
nop
-#endif
-
bra need_resched
nop
.align 2
1: .long PREEMPT_ACTIVE
2: .long schedule
-#ifdef CONFIG_TRACE_IRQFLAGS
-3: .long trace_hardirqs_on
-4: .long trace_hardirqs_off
-#endif
+3: .long preempt_schedule_irq
#endif
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
jmp @r1
lds r0, pr
work_resched:
-#ifndef CONFIG_PREEMPT
- ! gUSA handling
- mov.l @(OFF_SP,r15), r0 ! get user space stack pointer
- mov r0, r1
- shll r0
- bf/s 1f
- shll r0
- bf/s 1f
- mov #OFF_PC, r0
- ! SP >= 0xc0000000 : gUSA mark
- mov.l @(r0,r15), r2 ! get user space PC (program counter)
- mov.l @(OFF_R0,r15), r3 ! end point
- cmp/hs r3, r2 ! r2 >= r3?
- bt 1f
- add r3, r1 ! rewind point #2
- mov.l r1, @(r0,r15) ! reset PC to rewind point #2
- !
-1:
-#endif
mov.l 1f, r1
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
.align 2
1: .long schedule
2: .long do_notify_resume
-3: .long restore_all
-#ifdef CONFIG_TRACE_IRQFLAGS
-4: .long trace_hardirqs_on
-5: .long trace_hardirqs_off
-#endif
+3: .long resume_userspace
.align 2
syscall_exit_work:
! r0: current_thread_info->flags
! r8: current_thread_info
- tst #_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP, 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
- ! XXX setup arguments...
- mov.l 4f, r0 ! do_syscall_trace
+ mov r15, r4
+ mov.l 8f, r0 ! do_syscall_trace_leave
jsr @r0
nop
bra resume_userspace
.align 2
syscall_trace_entry:
! Yes it is traced.
- ! XXX setup arguments...
- mov.l 4f, r11 ! Call do_syscall_trace which notifies
+ mov r15, r4
+ mov.l 7f, r11 ! Call do_syscall_trace_enter which notifies
jsr @r11 ! superior (will chomp R[0-7])
nop
+ mov.l r0, @(OFF_R0,r15) ! Save return value
! Reload R0-R4 from kernel stack, where the
! parent may have modified them using
! ptrace(POKEUSR). (Note that R0-R2 are
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
+ get_current_thread_info r8, r0
mov #-ENOSYS, r0
bra resume_userspace
mov.l r0, @(OFF_R0,r15) ! Return value
mov.l 1f, r8
add r0, r8
mov.l @r8, r8
- jmp @r8
+ jsr @r8
+ nop
+ bra __restore_all
nop
+ CFI_ENDPROC
.align 2
1: .long debug_trap_table
* 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
#endif
+
+ mov #OFF_TRA, r10
+ add r15, r10
+ mov.l r8, @r10 ! set TRA value to tra
+
/*
* Check the trap type
*/
mov #((0x20 << 2) - 1), r9
cmp/hi r9, r8
bt/s debug_trap ! it's a debug trap..
- mov #OFF_TRA, r9
- add r15, r9
- mov.l r8, @r9 ! set TRA value to tra
-#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_SYSCALL_TRACE, 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
!
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
#endif
2: .long NR_syscalls
3: .long sys_call_table
-4: .long do_syscall_trace
-#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
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff