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| author | Pingfan Liu <kernelfans@gmail.com> | 2020-08-03 13:49:48 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-07 01:32:00 +0200 |
| commit | 52416ffcf823ee11aa19792715664ab94757f111 (patch) | |
| tree | 3c66b1d806bf27a7415a841e65813c6f56131814 /arch/x86 | |
| parent | 7d98585860d845e36ee612832a5ff021f201dbaf (diff) | |
| download | linux-stable-52416ffcf823ee11aa19792715664ab94757f111.tar.gz linux-stable-52416ffcf823ee11aa19792715664ab94757f111.tar.bz2 linux-stable-52416ffcf823ee11aa19792715664ab94757f111.zip | |
x86/purgatory: Don't generate debug info for purgatory.ro
Purgatory.ro is a standalone binary that is not linked against the rest of
the kernel. Its image is copied into an array that is linked to the
kernel, and from there kexec relocates it wherever it desires.
Unlike the debug info for vmlinux, which can be used for analyzing crash
such info is useless in purgatory.ro. And discarding them can save about
200K space.
Original:
259080 kexec-purgatory.o
Stripped debug info:
29152 kexec-purgatory.o
Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Steve Wahl <steve.wahl@hpe.com>
Acked-by: Dave Young <dyoung@redhat.com>
Link: https://lore.kernel.org/r/1596433788-3784-1-git-send-email-kernelfans@gmail.com
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/purgatory/Makefile | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile index 088bd764e0b7..d24b43a4451a 100644 --- a/arch/x86/purgatory/Makefile +++ b/arch/x86/purgatory/Makefile @@ -32,7 +32,7 @@ KCOV_INSTRUMENT := n # make up the standalone purgatory.ro PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel -PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss +PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss -g0 PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING PURGATORY_CFLAGS += $(call cc-option,-fno-stack-protector) @@ -64,6 +64,9 @@ CFLAGS_sha256.o += $(PURGATORY_CFLAGS) CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) CFLAGS_string.o += $(PURGATORY_CFLAGS) +AFLAGS_REMOVE_setup-x86_$(BITS).o += -Wa,-gdwarf-2 +AFLAGS_REMOVE_entry64.o += -Wa,-gdwarf-2 + $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE $(call if_changed,ld) |