summaryrefslogtreecommitdiff
path: root/arch/sh/kernel/entry-common.S
diff options
context:
space:
mode:
authorPaul Mundt <lethal@linux-sh.org>2008-07-30 19:55:30 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-08-02 04:39:33 +0900
commitab99c733ae73cce31f2a2434f7099564e5a73d95 (patch)
treec9eb381f05688b8b4e79d2ffe495b4d4b302f2d4 /arch/sh/kernel/entry-common.S
parentc459dbf294b4a3d70490a468a7ca3907fb2c2f57 (diff)
sh: Make syscall tracer use tracehook notifiers, add TIF_NOTIFY_RESUME.
This follows the changes in commits: 7d6d637dac2050f30a1b57b0a3dc5de4a10616ba 4f72c4279eab1e5f3ed1ac4e55d4527617582392 on powerpc. Adding in TIF_NOTIFY_RESUME, and cleaning up the syscall tracing to be more generic. This is an incremental step to turning on tracehook, as well as unifying more of the ptrace and signal code across the 32/64 split. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/entry-common.S')
-rw-r--r--arch/sh/kernel/entry-common.S12
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index a34417c8ee0a..0bc17def55a7 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -211,10 +211,8 @@ syscall_exit_work:
nop
#endif
sti
- ! XXX setup arguments...
mov r15, r4
- mov #1, r5
- mov.l 4f, r0 ! do_syscall_trace
+ mov.l 8f, r0 ! do_syscall_trace_leave
jsr @r0
nop
bra resume_userspace
@@ -223,12 +221,11 @@ syscall_exit_work:
.align 2
syscall_trace_entry:
! Yes it is traced.
- ! XXX setup arguments...
mov r15, r4
- mov #0, r5
- mov.l 4f, r11 ! Call do_syscall_trace which notifies
+ 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
@@ -389,8 +386,9 @@ syscall_exit:
#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