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Diffstat (limited to 'drivers/firmware/efi/libstub/Makefile')
-rw-r--r--drivers/firmware/efi/libstub/Makefile114
1 files changed, 71 insertions, 43 deletions
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index d0537573501e..7d15a85d579f 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -5,31 +5,38 @@
# things like ftrace and stack-protector are likely to cause trouble if left
# enabled, even if doing so doesn't break the build.
#
+
+# non-x86 reuses KBUILD_CFLAGS, x86 does not
+cflags-y := $(KBUILD_CFLAGS)
+
cflags-$(CONFIG_X86_32) := -march=i386
cflags-$(CONFIG_X86_64) := -mcmodel=small
-cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \
+cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -std=gnu11 -fms-extensions \
-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) \
+ $(if $(CONFIG_CC_IS_CLANG),-Wno-gnu -Wno-microsoft-anon-tag) \
-fno-asynchronous-unwind-tables \
$(CLANG_FLAGS)
# arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly
# disable the stackleak plugin
-cflags-$(CONFIG_ARM64) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
- -fpie $(DISABLE_STACKLEAK_PLUGIN) \
- $(call cc-option,-mbranch-protection=none)
-cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
- -fno-builtin -fpic \
- $(call cc-option,-mno-single-pic-base)
-cflags-$(CONFIG_RISCV) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
- -fpic
-
-cflags-$(CONFIG_EFI_GENERIC_STUB) += -I$(srctree)/scripts/dtc/libfdt
-
-KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
+cflags-$(CONFIG_ARM64) += -fpie $(DISABLE_KSTACK_ERASE) \
+ -fno-unwind-tables -fno-asynchronous-unwind-tables
+cflags-$(CONFIG_ARM) += -DEFI_HAVE_STRLEN -DEFI_HAVE_STRNLEN \
+ -DEFI_HAVE_MEMCHR -DEFI_HAVE_STRRCHR \
+ -DEFI_HAVE_STRCMP -fno-builtin -fpic \
+ $(call cc-option,-mno-single-pic-base) \
+ $(DISABLE_KSTACK_ERASE)
+cflags-$(CONFIG_RISCV) += -fpic -DNO_ALTERNATIVE -mno-relax \
+ $(DISABLE_KSTACK_ERASE)
+cflags-$(CONFIG_LOONGARCH) += -fpie $(DISABLE_KSTACK_ERASE)
+
+cflags-$(CONFIG_EFI_PARAMS_FROM_FDT) += -I$(srctree)/scripts/dtc/libfdt
+
+KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(cflags-y)) \
+ -Os -DDISABLE_BRANCH_PROFILING \
-include $(srctree)/include/linux/hidden.h \
-D__NO_FORTIFY \
-ffreestanding \
@@ -37,54 +44,72 @@ KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
$(call cc-option,-fno-addrsig) \
-D__DISABLE_EXPORTS
+#
+# struct randomization only makes sense for Linux internal types, which the EFI
+# stub code never touches, so let's turn off struct randomization for the stub
+# altogether
+#
+KBUILD_CFLAGS := $(filter-out $(RANDSTRUCT_CFLAGS), $(KBUILD_CFLAGS))
+
# remove SCS flags from all objects in this directory
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
+# disable CFI
+KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_CFI), $(KBUILD_CFLAGS))
# disable LTO
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
-GCOV_PROFILE := n
-# Sanitizer runtimes are unavailable and cannot be linked here.
-KASAN_SANITIZE := n
-KCSAN_SANITIZE := n
-UBSAN_SANITIZE := n
-OBJECT_FILES_NON_STANDARD := y
+# The .data section would be renamed to .data.efistub, therefore, remove
+# `-fdata-sections` flag from KBUILD_CFLAGS_KERNEL
+KBUILD_CFLAGS_KERNEL := $(filter-out -fdata-sections, $(KBUILD_CFLAGS_KERNEL))
-# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
-KCOV_INSTRUMENT := n
+KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
lib-y := efi-stub-helper.o gop.o secureboot.o tpm.o \
file.o mem.o random.o randomalloc.o pci.o \
skip_spaces.o lib-cmdline.o lib-ctype.o \
- alignedmem.o relocate.o vsprintf.o
+ alignedmem.o relocate.o printk.o vsprintf.o
-# include the stub's generic dependencies from lib/ when building for ARM/arm64
-efi-deps-y := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c fdt_empty_tree.c fdt_sw.c
+# include the stub's libfdt dependencies from lib/ when needed
+libfdt-deps := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c \
+ fdt_empty_tree.c fdt_sw.c
+
+lib-$(CONFIG_EFI_PARAMS_FROM_FDT) += fdt.o \
+ $(patsubst %.c,lib-%.o,$(libfdt-deps))
$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
$(call if_changed_rule,cc_o_c)
-lib-$(CONFIG_EFI_GENERIC_STUB) += efi-stub.o fdt.o string.o \
- $(patsubst %.c,lib-%.o,$(efi-deps-y))
+lib-$(CONFIG_EFI_GENERIC_STUB) += efi-stub.o string.o intrinsics.o systable.o \
+ screen_info.o efi-stub-entry.o
lib-$(CONFIG_ARM) += arm32-stub.o
-lib-$(CONFIG_ARM64) += arm64-stub.o
-lib-$(CONFIG_X86) += x86-stub.o
-lib-$(CONFIG_RISCV) += riscv-stub.o
+lib-$(CONFIG_ARM64) += kaslr.o arm64.o arm64-stub.o smbios.o
+lib-$(CONFIG_X86) += x86-stub.o smbios.o
+lib-$(CONFIG_X86_64) += x86-5lvl.o
+lib-$(CONFIG_RISCV) += kaslr.o riscv.o riscv-stub.o
+lib-$(CONFIG_LOONGARCH) += loongarch.o loongarch-stub.o
+
CFLAGS_arm32-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
+zboot-obj-y := zboot-decompress-gzip.o
+CFLAGS_zboot-decompress-gzip.o += -I$(srctree)/lib/zlib_inflate
+zboot-obj-$(CONFIG_KERNEL_ZSTD) := zboot-decompress-zstd.o lib-xxhash.o
+CFLAGS_zboot-decompress-zstd.o += -I$(srctree)/lib/zstd
+
+zboot-obj-$(CONFIG_RISCV) += lib-clz_ctz.o lib-ashldi3.o
+lib-$(CONFIG_EFI_ZBOOT) += zboot.o $(zboot-obj-y)
+
+lib-$(CONFIG_UNACCEPTED_MEMORY) += unaccepted_memory.o bitmap.o find.o
+
+targets := $(lib-y)
+lib-y := $(patsubst %.o,%.stub.o,$(lib-y))
+
# Even when -mbranch-protection=none is set, Clang will generate a
# .note.gnu.property for code-less object files (like lib/ctype.c),
# so work around this by explicitly removing the unwanted section.
-# https://bugs.llvm.org/show_bug.cgi?id=46480
+# https://llvm.org/pr46480
STUBCOPY_FLAGS-y += --remove-section=.note.gnu.property
-#
-# For x86, bootloaders like systemd-boot or grub-efi do not zero-initialize the
-# .bss section, so the .bss section of the EFI stub needs to be included in the
-# .data section of the compressed kernel to ensure initialization. Rename the
-# .bss section here so it's easy to pick out in the linker script.
-#
-STUBCOPY_FLAGS-$(CONFIG_X86) += --rename-section .bss=.bss.efistub,load,alloc
STUBCOPY_RELOC-$(CONFIG_X86_32) := R_386_32
STUBCOPY_RELOC-$(CONFIG_X86_64) := R_X86_64_64
@@ -111,19 +136,22 @@ STUBCOPY_RELOC-$(CONFIG_ARM) := R_ARM_ABS
# a verification pass to see if any absolute relocations exist in any of the
# object files.
#
-extra-y := $(lib-y)
-lib-y := $(patsubst %.o,%.stub.o,$(lib-y))
-
STUBCOPY_FLAGS-$(CONFIG_ARM64) += --prefix-alloc-sections=.init \
--prefix-symbols=__efistub_
STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS
# For RISC-V, we don't need anything special other than arm64. Keep all the
# symbols in .init section and make sure that no absolute symbols references
-# doesn't exist.
+# exist.
STUBCOPY_FLAGS-$(CONFIG_RISCV) += --prefix-alloc-sections=.init \
--prefix-symbols=__efistub_
-STUBCOPY_RELOC-$(CONFIG_RISCV) := R_RISCV_HI20
+STUBCOPY_RELOC-$(CONFIG_RISCV) := -E R_RISCV_HI20\|R_RISCV_$(BITS)\|R_RISCV_RELAX
+
+# For LoongArch, keep all the symbols in .init section and make sure that no
+# absolute symbols references exist.
+STUBCOPY_FLAGS-$(CONFIG_LOONGARCH) += --prefix-alloc-sections=.init \
+ --prefix-symbols=__efistub_
+STUBCOPY_RELOC-$(CONFIG_LOONGARCH) := R_LARCH_MARK_LA
$(obj)/%.stub.o: $(obj)/%.o FORCE
$(call if_changed,stubcopy)
generated by cgit (git 2.34.1) at 2025-12-28 04:14:42 +0000