From 151941a800fd9598d38f8b5a73de0471afe66507 Mon Sep 17 00:00:00 2001 From: Matt Waddel <Matt.Waddel@freescale.com> Date: Tue, 23 Oct 2007 14:37:54 +1000 Subject: [PATCH] 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> --- arch/m68knommu/platform/5307/entry.S | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/m68knommu/platform/5307/entry.S b/arch/m68knommu/platform/5307/entry.S index a8cd867805cae..b333731b875a8 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 -- GitLab