xref: /linux/arch/s390/purgatory/Makefile (revision 6f7e6393d1ce636bb7ec77a7fe7b77458fddf701)
1# SPDX-License-Identifier: GPL-2.0
2
3purgatory-y := head.o purgatory.o string.o sha256.o mem.o
4
5targets += $(purgatory-y) purgatory.lds purgatory purgatory.chk purgatory.ro
6PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
7
8$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
9	$(call if_changed_rule,cc_o_c)
10
11CFLAGS_sha256.o := -D__NO_FORTIFY
12
13$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE
14	$(call if_changed_rule,as_o_S)
15
16KBUILD_CFLAGS := -std=gnu11 -fms-extensions -fno-strict-aliasing -Wall -Wstrict-prototypes
17KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
18KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
19KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common
20KBUILD_CFLAGS += -fno-stack-protector
21KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
22KBUILD_CFLAGS += -D__DISABLE_EXPORTS
23KBUILD_CFLAGS += $(CLANG_FLAGS)
24KBUILD_CFLAGS += $(if $(CONFIG_CC_IS_CLANG),-Wno-microsoft-anon-tag)
25KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
26KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe)
27KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS))
28KBUILD_AFLAGS += -D__DISABLE_EXPORTS
29
30# Since we link purgatory with -r unresolved symbols are not checked, so we
31# also link a purgatory.chk binary without -r to check for unresolved symbols.
32PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib
33LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T
34LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS)
35$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE
36		$(call if_changed,ld)
37
38$(obj)/purgatory.chk: $(obj)/purgatory FORCE
39		$(call if_changed,ld)
40
41OBJCOPYFLAGS_purgatory.ro := -O elf64-s390
42OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*'
43OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment'
44OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*'
45$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE
46		$(call if_changed,objcopy)
47
48$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro
49
50obj-y += kexec-purgatory.o
51