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