efi/libstub: Optimize for size instead of speed (bbf8e8b0) · Commits · 戴 / test

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>

drivers/firmware/efi/libstub/Makefile

+2 −2

Original line number	Diff line number	Diff line
		@@ -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) \

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