Commit 3d252454 authored Oct 30, 2019 by Sven Schnelle Committed by Helge Deller Oct 30, 2019

parisc: fix frame pointer in ftrace_regs_caller()



The current code in ftrace_regs_caller() doesn't assign
%r3 to contain the address of the current frame. This
is hidden if the kernel is compiled with FRAME_POINTER,
but without it just crashes because it tries to dereference
an arbitrary address. Fix this by always setting %r3 to the
current stack frame.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>

parent 320000e7

arch/parisc/kernel/entry.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -2125,7 +2125,7 @@ ftrace_regs_caller:
		copy %rp, %r26
		LDREG -FTRACE_FRAME_SIZE-PT_SZ_ALGN(%sp), %r25
		ldo -8(%r25), %r25
		copy %r3, %arg2
		ldo -FTRACE_FRAME_SIZE(%r1), %arg2
		b,l ftrace_function_trampoline, %rp
		copy %r1, %arg3 /* struct pt_regs */

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