Messages in this thread Patch in this message | | | From | David Howells <> | Subject | [PATCH 1/3] Make it possible for the linker to discard local symbols from vmlinux | Date | Tue, 17 Feb 2009 16:55:53 +0000 |
| |
Make it possible for the linker to discard local symbols from vmlinux as they cause vmlinux to balloon when CONFIG_KALLSYMS=y and they cause dump_stack() and get_wchan() to produce useless information under some circumstances.
With this we add a config option (CONFIG_STRIP_ASM_SYMS) that will cause the build to supply -X to the linker to tell it to strip temporary local symbols.
This doesn't seem to cause gdb any problems.
Signed-off-by: David Howells <dhowells@redhat.com> ---
Makefile | 4 ++++ init/Kconfig | 8 ++++++++ 2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile index 22d7584..359470f 100644 --- a/Makefile +++ b/Makefile @@ -589,6 +589,10 @@ LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) +ifeq ($(CONFIG_STRIP_ASM_SYMS),y) +LDFLAGS_vmlinux += -X +endif + # Default kernel image to build when no specific target is given. # KBUILD_IMAGE may be overruled on the command line or # set in the environment diff --git a/init/Kconfig b/init/Kconfig index f068071..50c267a 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -737,6 +737,14 @@ config KALLSYMS_EXTRA_PASS you wait for kallsyms to be fixed. +config STRIP_ASM_SYMS + bool "Strip assembler-generated symbols during link" + default n + help + Strip internal assembler-generated symbols during a link (symbols + that look like '.Lxxx') so they don't pollute the output of + get_wchan() and suchlike. + config HOTPLUG bool "Support for hot-pluggable devices" if EMBEDDED default y
| |