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 $(call if_changed_rule,cc_o_c) 10 11CFLAGS_sha256.o := -D__DISABLE_EXPORTS -D__NO_FORTIFY 12 13$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE 14 $(call if_changed_rule,as_o_S) 15 16KBUILD_CFLAGS := -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 += $(CLANG_FLAGS) 23KBUILD_CFLAGS += $(call cc-option,-fno-PIE) 24KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) 25 26# Since we link purgatory with -r unresolved symbols are not checked, so we 27# also link a purgatory.chk binary without -r to check for unresolved symbols. 28PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib 29LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T 30LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS) 31$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE 32 $(call if_changed,ld) 33 34$(obj)/purgatory.chk: $(obj)/purgatory FORCE 35 $(call if_changed,ld) 36 37OBJCOPYFLAGS_purgatory.ro := -O elf64-s390 38OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*' 39OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment' 40OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*' 41$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE 42 $(call if_changed,objcopy) 43 44$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro 45 46obj-y += kexec-purgatory.o 47