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 -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 += $(call cc-option,-fno-PIE) 25KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) 26KBUILD_AFLAGS += -D__DISABLE_EXPORTS 27 28# Since we link purgatory with -r unresolved symbols are not checked, so we 29# also link a purgatory.chk binary without -r to check for unresolved symbols. 30PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib 31LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T 32LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS) 33$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE 34 $(call if_changed,ld) 35 36$(obj)/purgatory.chk: $(obj)/purgatory FORCE 37 $(call if_changed,ld) 38 39OBJCOPYFLAGS_purgatory.ro := -O elf64-s390 40OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*' 41OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment' 42OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*' 43$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE 44 $(call if_changed,objcopy) 45 46$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro 47 48obj-y += kexec-purgatory.o 49