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Commit 151941a8 authored by Matt Waddel's avatar Matt Waddel Committed by Linus Torvalds
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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: default avatarGreg Ungerer <gerg@uclinux.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f909b1ef

arch/m68knommu/platform/5307/entry.S

+4 −1
Original line number Diff line number Diff line
@@ -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