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| author | Arvind Sankar <nivedita@alum.mit.edu> | 2020-05-18 22:06:57 +0300 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2020-05-19 11:30:52 +0300 |
| commit | bbf8e8b0fe0401e1952c77088692fd273a9635a1 (patch) | |
| tree | cbec01ae963346a9a6317beccae6fbfac5416a80 | |
| parent | 2c7d1e30e5884dc6f6727ecd9417491c9f321b59 (diff) | |
| download | linux-bbf8e8b0fe0401e1952c77088692fd273a9635a1.tar.xz | |
efi/libstub: Optimize for size instead of speed
Reclaim the bloat from the addition of printf by optimizing the stub for
size. With gcc 9, the text size of the stub is:
ARCH before +printf -Os
arm 35197 37889 34638
arm64 34883 38159 34479
i386 18571 21657 17025
x86_64 25677 29328 22144
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200518190716.751506-6-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
| -rw-r--r-- | drivers/firmware/efi/libstub/Makefile | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index fb34c9d14a3c..034d71663b1e 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -7,7 +7,7 @@ # cflags-$(CONFIG_X86_32) := -march=i386 cflags-$(CONFIG_X86_64) := -mcmodel=small -cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \ +cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \ -fPIC -fno-strict-aliasing -mno-red-zone \ -mno-mmx -mno-sse -fshort-wchar \ -Wno-pointer-sign \ @@ -25,7 +25,7 @@ cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \ cflags-$(CONFIG_EFI_GENERIC_STUB) += -I$(srctree)/scripts/dtc/libfdt -KBUILD_CFLAGS := $(cflags-y) -DDISABLE_BRANCH_PROFILING \ +KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \ -include $(srctree)/drivers/firmware/efi/libstub/hidden.h \ -D__NO_FORTIFY \ $(call cc-option,-ffreestanding) \ |