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-rw-r--r--arch/sh/kernel/entry-common.S59
1 files changed, 31 insertions, 28 deletions
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index 9bac5bbb67f3..ad963104d22d 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -178,34 +178,6 @@ syscall_exit_work:
bra resume_userspace
nop
- .align 2
-syscall_trace_entry:
- ! Yes it is traced.
- 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
- ! reloaded from the kernel stack by syscall_call
- ! below, so don't need to be reloaded here.)
- ! This allows the parent to rewrite system calls
- ! and args on the fly.
- mov.l @(OFF_R4,r15), r4 ! arg0
- mov.l @(OFF_R5,r15), r5
- mov.l @(OFF_R6,r15), r6
- mov.l @(OFF_R7,r15), r7 ! arg3
- mov.l @(OFF_R3,r15), r3 ! syscall_nr
- !
- mov.l 6f, r10 ! Number of syscalls
- cmp/hs r10, r3
- bf syscall_call
- mov #-ENOSYS, r0
- bra syscall_exit
- mov.l r0, @(OFF_R0,r15) ! Return value
-
__restore_all:
mov #OFF_SR, r0
mov.l @(r0,r15), r0 ! get status register
@@ -388,6 +360,37 @@ syscall_exit:
bf syscall_exit_work
bra __restore_all
nop
+
+ .align 2
+syscall_trace_entry:
+ ! Yes it is traced.
+ mov r15, r4
+ mov.l 7f, r11 ! Call do_syscall_trace_enter which notifies
+ jsr @r11 ! superior (will chomp R[0-7])
+ nop
+ cmp/eq #-1, r0
+ bt syscall_exit
+ 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
+ ! reloaded from the kernel stack by syscall_call
+ ! below, so don't need to be reloaded here.)
+ ! This allows the parent to rewrite system calls
+ ! and args on the fly.
+ mov.l @(OFF_R4,r15), r4 ! arg0
+ mov.l @(OFF_R5,r15), r5
+ mov.l @(OFF_R6,r15), r6
+ mov.l @(OFF_R7,r15), r7 ! arg3
+ mov.l @(OFF_R3,r15), r3 ! syscall_nr
+ !
+ mov.l 6f, r10 ! Number of syscalls
+ cmp/hs r10, r3
+ bf syscall_call
+ mov #-ENOSYS, r0
+ bra syscall_exit
+ mov.l r0, @(OFF_R0,r15) ! Return value
+
.align 2
#if !defined(CONFIG_CPU_SH2)
1: .long TRA