Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/drivers/firmware/efi/libstub/Makefile
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# SPDX-License-Identifier: GPL-2.0 # # The stub may be linked into the kernel proper or into a separate boot binary, # but in either case, it executes before the kernel does (with MMU disabled) so # things like ftrace and stack-protector are likely to cause trouble if left # enabled, even if doing so doesn't break the build. # cflags-$(CONFIG_X86_32) := -march=i386 cflags-$(CONFIG_X86_64) := -mcmodel=small cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \ -fPIC -fno-strict-aliasing -mno-red-zone \ -mno-mmx -mno-sse -fshort-wchar \ -Wno-pointer-sign \ $(call cc-disable-warning, address-of-packed-member) \ $(call cc-disable-warning, gnu) # arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly # disable the stackleak plugin cflags-$(CONFIG_ARM64) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \ -fpie $(DISABLE_STACKLEAK_PLUGIN) cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \ -fno-builtin -fpic \ $(call cc-option,-mno-single-pic-base) cflags-$(CONFIG_EFI_ARMSTUB) += -I$(srctree)/scripts/dtc/libfdt KBUILD_CFLAGS := $(cflags-y) -DDISABLE_BRANCH_PROFILING \ -D__NO_FORTIFY \ $(call cc-option,-ffreestanding) \ $(call cc-option,-fno-stack-protector) \ $(call cc-option,-fno-addrsig) \ -D__DISABLE_EXPORTS GCOV_PROFILE := n KASAN_SANITIZE := n UBSAN_SANITIZE := n OBJECT_FILES_NON_STANDARD := y # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. KCOV_INSTRUMENT := n lib-y := efi-stub-helper.o gop.o secureboot.o tpm.o # include the stub's generic dependencies from lib/ when building for ARM/arm64 arm-deps-y := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c fdt_empty_tree.c fdt_sw.c arm-deps-$(CONFIG_ARM64) += sort.c $(obj)/lib-%.o: $(srctree)/lib/%.c FORCE $(call if_changed_rule,cc_o_c) lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o string.o random.o \ $(patsubst %.c,lib-%.o,$(arm-deps-y)) lib-$(CONFIG_ARM) += arm32-stub.o lib-$(CONFIG_ARM64) += arm64-stub.o CFLAGS_arm32-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) CFLAGS_arm64-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) # # arm64 puts the stub in the kernel proper, which will unnecessarily retain all # code indefinitely unless it is annotated as __init/__initdata/__initconst etc. # So let's apply the __init annotations at the section level, by prefixing # the section names directly. This will ensure that even all the inline string # literals are covered. # The fact that the stub and the kernel proper are essentially the same binary # also means that we need to be extra careful to make sure that the stub does # not rely on any absolute symbol references, considering that the virtual # kernel mapping that the linker uses is not active yet when the stub is # executing. So build all C dependencies of the EFI stub into libstub, and do # a verification pass to see if any absolute relocations exist in any of the # object files. # extra-$(CONFIG_EFI_ARMSTUB) := $(lib-y) lib-$(CONFIG_EFI_ARMSTUB) := $(patsubst %.o,%.stub.o,$(lib-y)) STUBCOPY_FLAGS-$(CONFIG_ARM64) += --prefix-alloc-sections=.init \ --prefix-symbols=__efistub_ STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS $(obj)/%.stub.o: $(obj)/%.o FORCE $(call if_changed,stubcopy) # # Strip debug sections and some other sections that may legally contain # absolute relocations, so that we can inspect the remaining sections for # such relocations. If none are found, regenerate the output object, but # this time, use objcopy and leave all sections in place. # quiet_cmd_stubcopy = STUBCPY $@ cmd_stubcopy = \ $(STRIP) --strip-debug -o $@ $<; \ if $(OBJDUMP) -r $@ | grep $(STUBCOPY_RELOC-y); then \ echo "$@: absolute symbol references not allowed in the EFI stub" >&2; \ /bin/false; \ fi; \ $(OBJCOPY) $(STUBCOPY_FLAGS-y) $< $@ # # ARM discards the .data section because it disallows r/w data in the # decompressor. So move our .data to .data.efistub, which is preserved # explicitly by the decompressor linker script. # STUBCOPY_FLAGS-$(CONFIG_ARM) += --rename-section .data=.data.efistub STUBCOPY_RELOC-$(CONFIG_ARM) := R_ARM_ABS
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