1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
# SPDX-License-Identifier: GPL-2.0
KBUILD_AFLAGS += -D__DISABLE_EXPORTS
KBUILD_CFLAGS += -D__DISABLE_EXPORTS -mcmodel=small -fPIC \
-Os -DDISABLE_BRANCH_PROFILING \
$(DISABLE_STACKLEAK_PLUGIN) \
$(DISABLE_LATENT_ENTROPY_PLUGIN) \
-fno-stack-protector -D__NO_FORTIFY \
-fno-jump-tables \
-include $(srctree)/include/linux/hidden.h
# disable ftrace hooks and LTO
KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS))
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO),$(KBUILD_CFLAGS))
KASAN_SANITIZE := n
KCSAN_SANITIZE := n
KMSAN_SANITIZE := n
UBSAN_SANITIZE := n
KCOV_INSTRUMENT := n
obj-$(CONFIG_X86_64) += gdt_idt.o map_kernel.o
obj-$(CONFIG_AMD_MEM_ENCRYPT) += sme.o sev-startup.o
pi-objs := $(patsubst %.o,$(obj)/%.o,$(obj-y))
lib-$(CONFIG_X86_64) += la57toggle.o
lib-$(CONFIG_EFI_MIXED) += efi-mixed.o
#
# Disable objtool validation for all library code, which is intended
# to be linked into the decompressor or the EFI stub but not vmlinux
#
$(patsubst %.o,$(obj)/%.o,$(lib-y)): OBJECT_FILES_NON_STANDARD := y
#
# Invoke objtool for each object individually to check for absolute
# relocations, even if other objtool actions are being deferred.
#
$(pi-objs): objtool-enabled = 1
$(pi-objs): objtool-args = $(if $(delay-objtool),--dry-run,$(objtool-args-y)) --noabs
#
# Confine the startup code by prefixing all symbols with __pi_ (for position
# independent). This ensures that startup code can only call other startup
# code, or code that has explicitly been made accessible to it via a symbol
# alias.
#
$(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_
$(obj)/%.pi.o: $(obj)/%.o FORCE
$(call if_changed,objcopy)
targets += $(obj-y)
obj-y := $(patsubst %.o,%.pi.o,$(obj-y))
|
