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Commit 604bf5a2 authored by Jan Beulich's avatar Jan Beulich Committed by Linus Torvalds
Browse files

[PATCH] CONFIG_UNWIND_INFO 



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: default avatarJan 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: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent ab7efcc9

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