Merge tag 'sched-urgent-2020-12-27' of git://git.kernel.org/pub/scm/linux/kernel...
[linux/fpc-iii.git] / arch / x86 / purgatory / Makefile
blob95ea17a9d20cb723ea06b65104b2a9110dace921
1 # SPDX-License-Identifier: GPL-2.0
2 OBJECT_FILES_NON_STANDARD := y
4 purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o
6 targets += $(purgatory-y)
7 PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
9 $(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE
10 $(call if_changed_rule,cc_o_c)
12 $(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
13 $(call if_changed_rule,cc_o_c)
15 CFLAGS_sha256.o := -D__DISABLE_EXPORTS
17 # When linking purgatory.ro with -r unresolved symbols are not checked,
18 # also link a purgatory.chk binary without -r to check for unresolved symbols.
19 PURGATORY_LDFLAGS := -e purgatory_start -nostdlib -z nodefaultlib
20 LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS)
21 LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS)
22 targets += purgatory.ro purgatory.chk
24 # Sanitizer, etc. runtimes are unavailable and cannot be linked here.
25 GCOV_PROFILE := n
26 KASAN_SANITIZE := n
27 UBSAN_SANITIZE := n
28 KCSAN_SANITIZE := n
29 KCOV_INSTRUMENT := n
31 # These are adjustments to the compiler flags used for objects that
32 # make up the standalone purgatory.ro
34 PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
35 PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss -g0
36 PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
37 PURGATORY_CFLAGS += -fno-stack-protector
39 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
40 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
41 # sure how to relocate those.
42 ifdef CONFIG_FUNCTION_TRACER
43 PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE)
44 endif
46 ifdef CONFIG_STACKPROTECTOR
47 PURGATORY_CFLAGS_REMOVE += -fstack-protector
48 endif
50 ifdef CONFIG_STACKPROTECTOR_STRONG
51 PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong
52 endif
54 ifdef CONFIG_RETPOLINE
55 PURGATORY_CFLAGS_REMOVE += $(RETPOLINE_CFLAGS)
56 endif
58 CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE)
59 CFLAGS_purgatory.o += $(PURGATORY_CFLAGS)
61 CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE)
62 CFLAGS_sha256.o += $(PURGATORY_CFLAGS)
64 CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE)
65 CFLAGS_string.o += $(PURGATORY_CFLAGS)
67 AFLAGS_REMOVE_setup-x86_$(BITS).o += -Wa,-gdwarf-2
68 AFLAGS_REMOVE_entry64.o += -Wa,-gdwarf-2
70 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
71 $(call if_changed,ld)
73 $(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE
74 $(call if_changed,ld)
76 targets += kexec-purgatory.c
78 quiet_cmd_bin2c = BIN2C $@
79 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
81 $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro $(obj)/purgatory.chk FORCE
82 $(call if_changed,bin2c)
84 obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o