1# SPDX-License-Identifier: GPL-2.0 2 3CONTEXT_ANALYSIS := y 4 5purgatory-y := head.o purgatory.o string.o sha256.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__NO_FORTIFY 14 15CC_FLAGS_MARCH_MINIMUM := -march=z10 16 17KBUILD_CFLAGS := $(CC_FLAGS_DIALECT) -fno-strict-aliasing -Wall -Wstrict-prototypes 18KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare 19KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding 20KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common 21KBUILD_CFLAGS += -fno-stack-protector 22KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 23KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS 24KBUILD_CFLAGS += $(CLANG_FLAGS) 25KBUILD_CFLAGS += $(call cc-option,-fno-PIE) 26KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe) 27KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) 28KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS 29 30# Since we link purgatory with -r unresolved symbols are not checked, so we 31# also link a purgatory.chk binary without -r to check for unresolved symbols. 32PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib 33LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T 34LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS) 35$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE 36 $(call if_changed,ld) 37 38$(obj)/purgatory.chk: $(obj)/purgatory FORCE 39 $(call if_changed,ld) 40 41OBJCOPYFLAGS_purgatory.ro := -O elf64-s390 42OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*' 43OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment' 44OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*' 45$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE 46 $(call if_changed,objcopy) 47 48$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro 49 50obj-y += kexec-purgatory.o 51