Makefile (d729b554e17904e16498ab5c36122d70406f70ae) Makefile (68c76ad4a9571a2b603665c85cf8229bcf04982a)
1# SPDX-License-Identifier: GPL-2.0
2#
3# The stub may be linked into the kernel proper or into a separate boot binary,
4# but in either case, it executes before the kernel does (with MMU disabled) so
5# things like ftrace and stack-protector are likely to cause trouble if left
6# enabled, even if doing so doesn't break the build.
7#
1# SPDX-License-Identifier: GPL-2.0
2#
3# The stub may be linked into the kernel proper or into a separate boot binary,
4# but in either case, it executes before the kernel does (with MMU disabled) so
5# things like ftrace and stack-protector are likely to cause trouble if left
6# enabled, even if doing so doesn't break the build.
7#
8
9# non-x86 reuses KBUILD_CFLAGS, x86 does not
10cflags-y := $(KBUILD_CFLAGS)
11
12cflags-$(CONFIG_X86_32) := -march=i386
13cflags-$(CONFIG_X86_64) := -mcmodel=small
14cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \
15 -fPIC -fno-strict-aliasing -mno-red-zone \
16 -mno-mmx -mno-sse -fshort-wchar \
17 -Wno-pointer-sign \
18 $(call cc-disable-warning, address-of-packed-member) \
19 $(call cc-disable-warning, gnu) \
20 -fno-asynchronous-unwind-tables \
21 $(CLANG_FLAGS)
22
23# arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly
24# disable the stackleak plugin
8cflags-$(CONFIG_X86_32) := -march=i386
9cflags-$(CONFIG_X86_64) := -mcmodel=small
10cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \
11 -fPIC -fno-strict-aliasing -mno-red-zone \
12 -mno-mmx -mno-sse -fshort-wchar \
13 -Wno-pointer-sign \
14 $(call cc-disable-warning, address-of-packed-member) \
15 $(call cc-disable-warning, gnu) \
16 -fno-asynchronous-unwind-tables \
17 $(CLANG_FLAGS)
18
19# arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly
20# disable the stackleak plugin
25cflags-$(CONFIG_ARM64) += -fpie $(DISABLE_STACKLEAK_PLUGIN) \
21cflags-$(CONFIG_ARM64) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
22 -fpie $(DISABLE_STACKLEAK_PLUGIN) \
23 -fno-unwind-tables -fno-asynchronous-unwind-tables \
26 $(call cc-option,-mbranch-protection=none)
24 $(call cc-option,-mbranch-protection=none)
27cflags-$(CONFIG_ARM) += -DEFI_HAVE_STRLEN -DEFI_HAVE_STRNLEN \
28 -DEFI_HAVE_MEMCHR -DEFI_HAVE_STRRCHR \
29 -DEFI_HAVE_STRCMP -fno-builtin -fpic \
25cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
26 -fno-builtin -fpic \
30 $(call cc-option,-mno-single-pic-base)
27 $(call cc-option,-mno-single-pic-base)
31cflags-$(CONFIG_RISCV) += -fpic
32cflags-$(CONFIG_LOONGARCH) += -fpie
28cflags-$(CONFIG_RISCV) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
29 -fpic
30cflags-$(CONFIG_LOONGARCH) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
31 -fpie
33
34cflags-$(CONFIG_EFI_PARAMS_FROM_FDT) += -I$(srctree)/scripts/dtc/libfdt
35
32
33cflags-$(CONFIG_EFI_PARAMS_FROM_FDT) += -I$(srctree)/scripts/dtc/libfdt
34
36KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(cflags-y)) \
37 -Os -DDISABLE_BRANCH_PROFILING \
35KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
38 -include $(srctree)/include/linux/hidden.h \
39 -D__NO_FORTIFY \
40 -ffreestanding \
41 -fno-stack-protector \
42 $(call cc-option,-fno-addrsig) \
43 -D__DISABLE_EXPORTS
44
45#

--- 19 unchanged lines hidden (view full) ---

65OBJECT_FILES_NON_STANDARD := y
66
67# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
68KCOV_INSTRUMENT := n
69
70lib-y := efi-stub-helper.o gop.o secureboot.o tpm.o \
71 file.o mem.o random.o randomalloc.o pci.o \
72 skip_spaces.o lib-cmdline.o lib-ctype.o \
36 -include $(srctree)/include/linux/hidden.h \
37 -D__NO_FORTIFY \
38 -ffreestanding \
39 -fno-stack-protector \
40 $(call cc-option,-fno-addrsig) \
41 -D__DISABLE_EXPORTS
42
43#

--- 19 unchanged lines hidden (view full) ---

63OBJECT_FILES_NON_STANDARD := y
64
65# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
66KCOV_INSTRUMENT := n
67
68lib-y := efi-stub-helper.o gop.o secureboot.o tpm.o \
69 file.o mem.o random.o randomalloc.o pci.o \
70 skip_spaces.o lib-cmdline.o lib-ctype.o \
73 alignedmem.o relocate.o printk.o vsprintf.o
71 alignedmem.o relocate.o vsprintf.o
74
75# include the stub's libfdt dependencies from lib/ when needed
76libfdt-deps := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c \
77 fdt_empty_tree.c fdt_sw.c
78
79lib-$(CONFIG_EFI_PARAMS_FROM_FDT) += fdt.o \
80 $(patsubst %.c,lib-%.o,$(libfdt-deps))
81
82$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
83 $(call if_changed_rule,cc_o_c)
84
72
73# include the stub's libfdt dependencies from lib/ when needed
74libfdt-deps := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c \
75 fdt_empty_tree.c fdt_sw.c
76
77lib-$(CONFIG_EFI_PARAMS_FROM_FDT) += fdt.o \
78 $(patsubst %.c,lib-%.o,$(libfdt-deps))
79
80$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
81 $(call if_changed_rule,cc_o_c)
82
85lib-$(CONFIG_EFI_GENERIC_STUB) += efi-stub.o string.o intrinsics.o systable.o \
86 screen_info.o efi-stub-entry.o
83lib-$(CONFIG_EFI_GENERIC_STUB) += efi-stub.o string.o intrinsics.o systable.o
87
88lib-$(CONFIG_ARM) += arm32-stub.o
84
85lib-$(CONFIG_ARM) += arm32-stub.o
89lib-$(CONFIG_ARM64) += arm64.o arm64-stub.o arm64-entry.o
86lib-$(CONFIG_ARM64) += arm64-stub.o
90lib-$(CONFIG_X86) += x86-stub.o
87lib-$(CONFIG_X86) += x86-stub.o
91lib-$(CONFIG_RISCV) += riscv.o riscv-stub.o
92lib-$(CONFIG_LOONGARCH) += loongarch.o loongarch-stub.o
88lib-$(CONFIG_RISCV) += riscv-stub.o
89lib-$(CONFIG_LOONGARCH) += loongarch-stub.o
93
94CFLAGS_arm32-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
95
96zboot-obj-$(CONFIG_RISCV) := lib-clz_ctz.o lib-ashldi3.o
97lib-$(CONFIG_EFI_ZBOOT) += zboot.o $(zboot-obj-y)
98
99extra-y := $(lib-y)
100lib-y := $(patsubst %.o,%.stub.o,$(lib-y))

--- 34 unchanged lines hidden (view full) ---

135# not rely on any absolute symbol references, considering that the virtual
136# kernel mapping that the linker uses is not active yet when the stub is
137# executing. So build all C dependencies of the EFI stub into libstub, and do
138# a verification pass to see if any absolute relocations exist in any of the
139# object files.
140#
141STUBCOPY_FLAGS-$(CONFIG_ARM64) += --prefix-alloc-sections=.init \
142 --prefix-symbols=__efistub_
90
91CFLAGS_arm32-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
92
93zboot-obj-$(CONFIG_RISCV) := lib-clz_ctz.o lib-ashldi3.o
94lib-$(CONFIG_EFI_ZBOOT) += zboot.o $(zboot-obj-y)
95
96extra-y := $(lib-y)
97lib-y := $(patsubst %.o,%.stub.o,$(lib-y))

--- 34 unchanged lines hidden (view full) ---

132# not rely on any absolute symbol references, considering that the virtual
133# kernel mapping that the linker uses is not active yet when the stub is
134# executing. So build all C dependencies of the EFI stub into libstub, and do
135# a verification pass to see if any absolute relocations exist in any of the
136# object files.
137#
138STUBCOPY_FLAGS-$(CONFIG_ARM64) += --prefix-alloc-sections=.init \
139 --prefix-symbols=__efistub_
143STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS64
140STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS
144
145# For RISC-V, we don't need anything special other than arm64. Keep all the
146# symbols in .init section and make sure that no absolute symbols references
147# doesn't exist.
148STUBCOPY_FLAGS-$(CONFIG_RISCV) += --prefix-alloc-sections=.init \
149 --prefix-symbols=__efistub_
150STUBCOPY_RELOC-$(CONFIG_RISCV) := R_RISCV_HI20
151

--- 23 unchanged lines hidden --- 		141
142# For RISC-V, we don't need anything special other than arm64. Keep all the
143# symbols in .init section and make sure that no absolute symbols references
144# doesn't exist.
145STUBCOPY_FLAGS-$(CONFIG_RISCV) += --prefix-alloc-sections=.init \
146 --prefix-symbols=__efistub_
147STUBCOPY_RELOC-$(CONFIG_RISCV) := R_RISCV_HI20
148

--- 23 unchanged lines hidden ---