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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2009-07-21 09:56:27 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-07-21 17:21:28 +0100
commit4bf1fa5a34aa2dd0d2cc58f0fc213a2e22d007a4 (patch)
tree5618012a57263bf81e3e2678b622be948e4171b0 /arch/arm/kernel/Makefile
parent6a00cded91532f3d58e07729ba56269339281d8e (diff)
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[ARM] 5613/1: implement CALLER_ADDRESSx
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> As __builtin_return_address(n) doesn't work for ARM with n > 0, the kernel needs its own implementation. This fixes many warnings saying: warning: unsupported argument to '__builtin_return_address' The new methods and walk_stackframe must not be instrumented because CALLER_ADDRESSx is used in the various tracers and tracing the tracer is a bad idea. What's currently missing is an implementation using unwind tables. This is not fatal though, it's just that the tracers don't get enough information to be really useful. Note that if both ARM_UNWIND and FRAME_POINTER are enabled, walk_stackframe uses unwind information. So in this case the same implementation is used as when FRAME_POINTER is disabled. Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/Makefile')
-rw-r--r--arch/arm/kernel/Makefile4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index ff89d0b3abc5..3213c9382b17 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -8,10 +8,12 @@ ifdef CONFIG_DYNAMIC_FTRACE
CFLAGS_REMOVE_ftrace.o = -pg
endif
+CFLAGS_REMOVE_return_address.o = -pg
+
# Object file lists.
obj-y := compat.o elf.o entry-armv.o entry-common.o irq.o \
- process.o ptrace.o setup.o signal.o \
+ process.o ptrace.o return_address.o setup.o signal.o \
sys_arm.o stacktrace.o time.o traps.o
obj-$(CONFIG_ISA_DMA_API) += dma.o