diff options
| author |   Matt Waddel <Matt.Waddel@freescale.com> | 2007-10-23 14:37:54 +1000 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-23 08:32:07 -0700 |
| commit | 151941a800fd9598d38f8b5a73de0471afe66507 (patch) | |
| tree | d9b7a1ace0545cca9e5514532acfaa26198cf3ea /arch | |
| parent | m68knommu: improve code formating FEC driver (diff) | |
| download | linux-dev-151941a800fd9598d38f8b5a73de0471afe66507.tar.xz linux-dev-151941a800fd9598d38f8b5a73de0471afe66507.zip | |
m68knommu: fix syscall tracing
Fix the system call code for handling syscall tracing, so strace
and gdbserver work properly.
This fix originally developed by Philippe De Muyter and Stuart Hughes.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68knommu/platform/5307/entry.S | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/m68knommu/platform/5307/entry.S b/arch/m68knommu/platform/5307/entry.S index a8cd867805ca..b333731b875a 100644 --- a/arch/m68knommu/platform/5307/entry.S +++ b/arch/m68knommu/platform/5307/entry.S @@ -74,7 +74,8 @@ ENTRY(system_call) movel %sp,%d2 /* get thread_info pointer */ andl #-THREAD_SIZE,%d2 /* at start of kernel stack */ movel %d2,%a0 - movel %sp,%a0@(THREAD_ESP0) /* save top of frame */ + movel %a0@,%a1 /* save top of frame */ + movel %sp,%a1@(TASK_THREAD+THREAD_ESP0) btst #(TIF_SYSCALL_TRACE%8),%a0@(TI_FLAGS+(31-TIF_SYSCALL_TRACE)/8) bnes 1f @@ -83,6 +84,8 @@ ENTRY(system_call) movel %d0,%sp@(PT_D0) /* save the return value */ jra ret_from_exception 1: + movel #-ENOSYS,%d2 /* strace needs -ENOSYS in PT_D0 */ + movel %d2,PT_D0(%sp) /* on syscall entry */ subql #4,%sp SAVE_SWITCH_STACK jbsr syscall_trace |