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 $(call if_changed_rule,cc_o_c) 12 13CFLAGS_sha256.o := -D__DISABLE_EXPORTS -D__NO_FORTIFY 14 15$(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 22KCSAN_SANITIZE := n 23 24KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes 25KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare 26KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding 27KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common 28KBUILD_CFLAGS += -fno-stack-protector 29KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 30KBUILD_CFLAGS += $(CLANG_FLAGS) 31KBUILD_CFLAGS += $(call cc-option,-fno-PIE) 32KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) 33 34# Since we link purgatory with -r unresolved symbols are not checked, so we 35# also link a purgatory.chk binary without -r to check for unresolved symbols. 36PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib 37LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T 38LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS) 39$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE 40 $(call if_changed,ld) 41 42$(obj)/purgatory.chk: $(obj)/purgatory FORCE 43 $(call if_changed,ld) 44 45OBJCOPYFLAGS_purgatory.ro := -O elf64-s390 46OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*' 47OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment' 48OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*' 49$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE 50 $(call if_changed,objcopy) 51 52$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro 53 54obj-y += kexec-purgatory.o 55