arch/x86/purgatory/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 OBJECT_FILES_NON_STANDARD := y
   3
   4 purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o
   5
   6 targets += $(purgatory-y)
   7 PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
   8
   9 $(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE
  10         $(call if_changed_rule,cc_o_c)
  11
  12 $(obj)/sha256.o: $(srctree)/lib/sha256.c FORCE
  13         $(call if_changed_rule,cc_o_c)
  14
  15 LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
  16 targets += purgatory.ro
  17
  18 KASAN_SANITIZE  := n
  19 KCOV_INSTRUMENT := n
  20
  21 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
  22 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
  23 # sure how to relocate those. Like kexec-tools, use custom flags.
  24
  25 KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -Os -mcmodel=large
  26 KBUILD_CFLAGS += -m$(BITS)
  27 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
  28
  29 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
  30                 $(call if_changed,ld)
  31
  32 targets += kexec-purgatory.c
  33
  34 quiet_cmd_bin2c = BIN2C   $@
  35       cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
  36
  37 $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
  38         $(call if_changed,bin2c)
  39
  40 obj-$(CONFIG_KEXEC_FILE)        += kexec-purgatory.o