[PATCH] CONFIG_UNWIND_INFO (604bf5a2) · Commits · 戴 / test

As a foundation for reliable stack unwinding, this adds a config option (available to all architectures except IA64 and those where the module loader might have problems with the resulting relocations) to enable the generation of frame unwind information. Signed-off-by:

Jan Beulich <jbeulich@novell.com> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Paul Mundt <lethal@linux-sh.org>, Cc: Andi Kleen <ak@muc.de> Signed-off-by:

Andrew Morton <akpm@osdl.org> Signed-off-by:

Linus Torvalds <torvalds@osdl.org>

Makefile

+4 −0

Original line number	Diff line number	Diff line
		@@ -517,6 +517,10 @@ else
		CFLAGS += -fomit-frame-pointer
		endif

		ifdef CONFIG_UNWIND_INFO
		CFLAGS += -fasynchronous-unwind-tables
		endif

		ifdef CONFIG_DEBUG_INFO
		CFLAGS += -g
		endif

lib/Kconfig.debug

+11 −0

Original line number	Diff line number	Diff line
		@@ -195,6 +195,17 @@ config FRAME_POINTER
		some architectures or if you use external debuggers.
		If you don't debug the kernel, you can say N.

		config UNWIND_INFO
		bool "Compile the kernel with frame unwind information"
		depends on !IA64
		depends on !MODULES \|\| !(MIPS \|\| PARISC \|\| PPC \|\| SUPERH \|\| SPARC64 \|\| V850)
		default DEBUG_KERNEL
		help
		If you say Y here the resulting kernel image will be slightly larger
		but not slower, and it will give very useful debugging information.
		If you don't debug the kernel, you can say N, but we may not be able
		to solve problems without frame unwind information or frame pointers.

		config FORCED_INLINING
		bool "Force gcc to inline functions marked 'inline'"
		depends on DEBUG_KERNEL

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