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)/sha256.o: $(srctree)/lib/sha256.c FORCE
  10         $(call if_changed_rule,cc_o_c)
  11
  12 LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
  13 targets += purgatory.ro
  14
  15 KASAN_SANITIZE  := n
  16 KCOV_INSTRUMENT := n
  17
  18 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
  19 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
  20 # sure how to relocate those. Like kexec-tools, use custom flags.
  21
  22 KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -Os -mcmodel=large
  23 KBUILD_CFLAGS += -m$(BITS)
  24 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
  25
  26 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
  27                 $(call if_changed,ld)
  28
  29 targets += kexec-purgatory.c
  30
  31 CMD_BIN2C = $(objtree)/scripts/basic/bin2c
  32 quiet_cmd_bin2c = BIN2C   $@
  33       cmd_bin2c = $(CMD_BIN2C) kexec_purgatory < $< > $@
  34
  35 $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
  36         $(call if_changed,bin2c)
  37
  38 obj-$(CONFIG_KEXEC_FILE)        += kexec-purgatory.o