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

[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
......@@ -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
......
......@@ -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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