[linux-block.git] / arch / riscv / purgatory / Makefile

# SPDX-License-Identifier: GPL-2.0

purgatory-y := purgatory.o sha256.o entry.o string.o ctype.o memcpy.o memset.o
purgatory-y += strcmp.o strlen.o strncmp.o

targets += $(purgatory-y)
PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))

$(obj)/string.o: $(srctree)/lib/string.c FORCE
	$(call if_changed_rule,cc_o_c)

$(obj)/ctype.o: $(srctree)/lib/ctype.c FORCE
	$(call if_changed_rule,cc_o_c)

$(obj)/memcpy.o: $(srctree)/arch/riscv/lib/memcpy.S FORCE
	$(call if_changed_rule,as_o_S)

$(obj)/memset.o: $(srctree)/arch/riscv/lib/memset.S FORCE
	$(call if_changed_rule,as_o_S)

$(obj)/strcmp.o: $(srctree)/arch/riscv/lib/strcmp.S FORCE
	$(call if_changed_rule,as_o_S)

$(obj)/strlen.o: $(srctree)/arch/riscv/lib/strlen.S FORCE
	$(call if_changed_rule,as_o_S)

$(obj)/strncmp.o: $(srctree)/arch/riscv/lib/strncmp.S FORCE
	$(call if_changed_rule,as_o_S)

$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
	$(call if_changed_rule,cc_o_c)

CFLAGS_sha256.o := -D__DISABLE_EXPORTS -D__NO_FORTIFY
CFLAGS_string.o := -D__DISABLE_EXPORTS
CFLAGS_ctype.o := -D__DISABLE_EXPORTS

# When profile-guided optimization is enabled, llvm emits two different
# overlapping text sections, which is not supported by kexec. Remove profile
# optimization flags.
KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS))

# When linking purgatory.ro with -r unresolved symbols are not checked,
# also link a purgatory.chk binary without -r to check for unresolved symbols.
PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib
LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS)
LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS)
targets += purgatory.ro purgatory.chk

# These are adjustments to the compiler flags used for objects that
# make up the standalone purgatory.ro

PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
PURGATORY_CFLAGS := -mcmodel=medany -ffreestanding -fno-zero-initialized-in-bss
PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
PURGATORY_CFLAGS += -fno-stack-protector -g0

# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
# in turn leaves some undefined symbols like __fentry__ in purgatory and not
# sure how to relocate those.
ifdef CONFIG_FUNCTION_TRACER
PURGATORY_CFLAGS_REMOVE		+= $(CC_FLAGS_FTRACE)
endif

ifdef CONFIG_STACKPROTECTOR
PURGATORY_CFLAGS_REMOVE		+= -fstack-protector
endif

ifdef CONFIG_STACKPROTECTOR_STRONG
PURGATORY_CFLAGS_REMOVE		+= -fstack-protector-strong
endif

ifdef CONFIG_CFI_CLANG
PURGATORY_CFLAGS_REMOVE		+= $(CC_FLAGS_CFI)
endif

ifdef CONFIG_RELOCATABLE
PURGATORY_CFLAGS_REMOVE		+= -fPIE
endif

ifdef CONFIG_SHADOW_CALL_STACK
PURGATORY_CFLAGS_REMOVE		+= $(CC_FLAGS_SCS)
endif

CFLAGS_REMOVE_purgatory.o	+= $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_purgatory.o		+= $(PURGATORY_CFLAGS)

CFLAGS_REMOVE_sha256.o		+= $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_sha256.o			+= $(PURGATORY_CFLAGS)

CFLAGS_REMOVE_string.o		+= $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_string.o			+= $(PURGATORY_CFLAGS)

CFLAGS_REMOVE_ctype.o		+= $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_ctype.o			+= $(PURGATORY_CFLAGS)

asflags-remove-y		+= $(foreach x, -g -gdwarf-4 -gdwarf-5, $(x) -Wa,$(x))

$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
		$(call if_changed,ld)

$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE
		$(call if_changed,ld)

$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk

obj-y += kexec-purgatory.o
Commit	Line	Data
736e30af	1	# SPDX-License-Identifier: GPL-2.0
736e30af LZ	2
736e30af LZ	3	purgatory-y := purgatory.o sha256.o entry.o string.o ctype.o memcpy.o memset.o
56e0790c	4	purgatory-y += strcmp.o strlen.o strncmp.o
736e30af LZ	5
	6	targets += $(purgatory-y)
	7	PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
	8
	9	$(obj)/string.o: $(srctree)/lib/string.c FORCE
	10	$(call if_changed_rule,cc_o_c)
	11
	12	$(obj)/ctype.o: $(srctree)/lib/ctype.c FORCE
	13	$(call if_changed_rule,cc_o_c)
	14
	15	$(obj)/memcpy.o: $(srctree)/arch/riscv/lib/memcpy.S FORCE
	16	$(call if_changed_rule,as_o_S)
	17
	18	$(obj)/memset.o: $(srctree)/arch/riscv/lib/memset.S FORCE
	19	$(call if_changed_rule,as_o_S)
	20
56e0790c HS	21	$(obj)/strcmp.o: $(srctree)/arch/riscv/lib/strcmp.S FORCE
	22	$(call if_changed_rule,as_o_S)
	23
	24	$(obj)/strlen.o: $(srctree)/arch/riscv/lib/strlen.S FORCE
	25	$(call if_changed_rule,as_o_S)
	26
	27	$(obj)/strncmp.o: $(srctree)/arch/riscv/lib/strncmp.S FORCE
	28	$(call if_changed_rule,as_o_S)
	29
736e30af LZ	30	$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
	31	$(call if_changed_rule,cc_o_c)
	32
8762606a	33	CFLAGS_sha256.o := -D__DISABLE_EXPORTS -D__NO_FORTIFY
736e30af LZ	34	CFLAGS_string.o := -D__DISABLE_EXPORTS
	35	CFLAGS_ctype.o := -D__DISABLE_EXPORTS
	36
88ac3bbc RR	37	# When profile-guided optimization is enabled, llvm emits two different
	38	# overlapping text sections, which is not supported by kexec. Remove profile
	39	# optimization flags.
	40	KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS))
	41
736e30af LZ	42	# When linking purgatory.ro with -r unresolved symbols are not checked,
	43	# also link a purgatory.chk binary without -r to check for unresolved symbols.
	44	PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib
	45	LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS)
	46	LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS)
	47	targets += purgatory.ro purgatory.chk
	48
736e30af LZ	49	# These are adjustments to the compiler flags used for objects that
	50	# make up the standalone purgatory.ro
	51
	52	PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
	53	PURGATORY_CFLAGS := -mcmodel=medany -ffreestanding -fno-zero-initialized-in-bss
	54	PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
	55	PURGATORY_CFLAGS += -fno-stack-protector -g0
	56
	57	# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
	58	# in turn leaves some undefined symbols like __fentry__ in purgatory and not
	59	# sure how to relocate those.
	60	ifdef CONFIG_FUNCTION_TRACER
	61	PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE)
	62	endif
	63
	64	ifdef CONFIG_STACKPROTECTOR
	65	PURGATORY_CFLAGS_REMOVE += -fstack-protector
	66	endif
	67
	68	ifdef CONFIG_STACKPROTECTOR_STRONG
	69	PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong
	70	endif
	71
a72ab036 ST	72	ifdef CONFIG_CFI_CLANG
	73	PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_CFI)
	74	endif
	75
0f5f46a8 SS	76	ifdef CONFIG_RELOCATABLE
	77	PURGATORY_CFLAGS_REMOVE += -fPIE
	78	endif
	79
d1584d79 ST	80	ifdef CONFIG_SHADOW_CALL_STACK
	81	PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_SCS)
	82	endif
	83
736e30af LZ	84	CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE)
	85	CFLAGS_purgatory.o += $(PURGATORY_CFLAGS)
	86
	87	CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE)
	88	CFLAGS_sha256.o += $(PURGATORY_CFLAGS)
	89
	90	CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE)
	91	CFLAGS_string.o += $(PURGATORY_CFLAGS)
	92
	93	CFLAGS_REMOVE_ctype.o += $(PURGATORY_CFLAGS_REMOVE)
	94	CFLAGS_ctype.o += $(PURGATORY_CFLAGS)
	95
d83806c4	96	asflags-remove-y += $(foreach x, -g -gdwarf-4 -gdwarf-5, $(x) -Wa,$(x))
736e30af LZ	97
	98	$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
	99	$(call if_changed,ld)
	100
	101	$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE
	102	$(call if_changed,ld)
	103
d8357e3b	104	$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk
736e30af	105
788177e7	106	obj-y += kexec-purgatory.o