Commit | Line | Data |
---|---|---|
f4f75ad5 AB |
1 | # |
2 | # The stub may be linked into the kernel proper or into a separate boot binary, | |
3 | # but in either case, it executes before the kernel does (with MMU disabled) so | |
4 | # things like ftrace and stack-protector are likely to cause trouble if left | |
5 | # enabled, even if doing so doesn't break the build. | |
6 | # | |
7 | cflags-$(CONFIG_X86_32) := -march=i386 | |
8 | cflags-$(CONFIG_X86_64) := -mcmodel=small | |
9 | cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2 \ | |
10 | -fPIC -fno-strict-aliasing -mno-red-zone \ | |
11 | -mno-mmx -mno-sse -DDISABLE_BRANCH_PROFILING | |
12 | ||
13 | cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS)) | |
14 | cflags-$(CONFIG_ARM) := $(subst -pg,,$(KBUILD_CFLAGS)) \ | |
15 | -fno-builtin -fpic -mno-single-pic-base | |
16 | ||
17 | KBUILD_CFLAGS := $(cflags-y) \ | |
18 | $(call cc-option,-ffreestanding) \ | |
19 | $(call cc-option,-fno-stack-protector) | |
20 | ||
21 | GCOV_PROFILE := n | |
0b24becc | 22 | KASAN_SANITIZE := n |
f4f75ad5 AB |
23 | |
24 | lib-y := efi-stub-helper.o | |
25 | lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o | |
26 | ||
ddeeefe2 AB |
27 | # |
28 | # arm64 puts the stub in the kernel proper, which will unnecessarily retain all | |
29 | # code indefinitely unless it is annotated as __init/__initdata/__initconst etc. | |
30 | # So let's apply the __init annotations at the section level, by prefixing | |
31 | # the section names directly. This will ensure that even all the inline string | |
32 | # literals are covered. | |
33 | # | |
34 | extra-$(CONFIG_ARM64) := $(lib-y) | |
35 | lib-$(CONFIG_ARM64) := $(patsubst %.o,%.init.o,$(lib-y)) | |
36 | ||
37 | OBJCOPYFLAGS := --prefix-alloc-sections=.init | |
38 | $(obj)/%.init.o: $(obj)/%.o FORCE | |
39 | $(call if_changed,objcopy) |