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 18KCOV_INSTRUMENT := n 19GCOV_PROFILE := n 20UBSAN_SANITIZE := n 21KASAN_SANITIZE := n 22 23KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes 24KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare 25KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding 26KBUILD_CFLAGS += -c -MD -Os -m64 -msoft-float -fno-common 27KBUILD_CFLAGS += $(CLANG_FLAGS) 28KBUILD_CFLAGS += $(call cc-option,-fno-PIE) 29KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) 30 31# Since we link purgatory with -r unresolved symbols are not checked, so we 32# also link a purgatory.chk binary without -r to check for unresolved symbols. 33PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib 34LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T 35LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS) 36$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE 37 $(call if_changed,ld) 38 39$(obj)/purgatory.chk: $(obj)/purgatory FORCE 40 $(call if_changed,ld) 41 42OBJCOPYFLAGS_purgatory.ro := -O elf64-s390 43OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*' 44OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment' 45OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*' 46$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE 47 $(call if_changed,objcopy) 48 49$(obj)/kexec-purgatory.o: $(obj)/kexec-purgatory.S $(obj)/purgatory.ro FORCE 50 $(call if_changed_rule,as_o_S) 51 52obj-$(CONFIG_ARCH_HAS_KEXEC_PURGATORY) += kexec-purgatory.o 53