Commit 7be7ee2d authored Jul 07, 2011 by Jon Medhurst Committed by Tixy Jul 13, 2011

ARM: kprobes: Add BLX macro



This is for use by inline assembler which will be added to kprobes-arm.c
It saves memory when used on newer ARM architectures and also provides
correct interworking should ARM probes be required on Thumb kernels in
the future.

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>

parent df4fa1f8

arch/arm/kernel/kprobes-arm.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -67,6 +67,13 @@

		#define branch_displacement(insn) sign_extend(((insn) & 0xffffff) << 2, 25)

		#if __LINUX_ARM_ARCH__ >= 6
		#define BLX(reg) "blx "reg" \n\t"
		#else
		#define BLX(reg) "mov lr, pc \n\t" \
		"mov pc, "reg" \n\t"
		#endif

		#define is_r15(insn, bitpos) (((insn) & (0xf << bitpos)) == (0xf << bitpos))

		#define PSR_fs (PSR_f\|PSR_s)