Commit d51959d7 authored Mar 10, 2014 by Anton Blanchard

powerpc/tracing: TRACE_WITH_FRAME_BUFFER creates invalid stack frames



TRACE_WITH_FRAME_BUFFER creates 32 byte stack frames. On ppc64
ABIv1 this is too small and a callee could corrupt the stack by
writing to the parameter save area (starting at offset 48).

Signed-off-by: Anton Blanchard <anton@samba.org>

parent 6403105b

arch/powerpc/include/asm/irqflags.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -20,9 +20,9 @@
		*/
		#define TRACE_WITH_FRAME_BUFFER(func) \
		mflr r0; \
		stdu r1, -32(r1); \
		stdu r1, -STACK_FRAME_OVERHEAD(r1); \
		std r0, 16(r1); \
		stdu r1, -32(r1); \
		stdu r1, -STACK_FRAME_OVERHEAD(r1); \
		bl func; \
		ld r1, 0(r1); \
		ld r1, 0(r1);