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Linux/arch/s390/purgatory/Makefile

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  1 # SPDX-License-Identifier: GPL-2.0
  2 
  3 purgatory-y := head.o purgatory.o string.o sha256.o mem.o
  4 
  5 targets += $(purgatory-y) purgatory.lds purgatory purgatory.chk purgatory.ro
  6 PURGATORY_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 
 11 CFLAGS_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 
 16 KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes
 17 KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
 18 KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
 19 KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common
 20 KBUILD_CFLAGS += -fno-stack-protector
 21 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
 22 KBUILD_CFLAGS += $(CLANG_FLAGS)
 23 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
 24 KBUILD_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.
 28 PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib
 29 LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T
 30 LDFLAGS_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 
 37 OBJCOPYFLAGS_purgatory.ro := -O elf64-s390
 38 OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*'
 39 OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment'
 40 OBJCOPYFLAGS_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 
 46 obj-y += kexec-purgatory.o

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