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/crypto/sha256.c FORCE
  13         $(call if_changed_rule,cc_o_c)
  14
  15 CFLAGS_sha256.o := -D__DISABLE_EXPORTS
  16
  17 LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
  18 targets += purgatory.ro
  19
  20 KASAN_SANITIZE  := n
  21 KCOV_INSTRUMENT := n
  22
  23 # These are adjustments to the compiler flags used for objects that
  24 # make up the standalone purgatory.ro
  25
  26 PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
  27 PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss
  28 PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN)
  29
  30 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
  31 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
  32 # sure how to relocate those.
  33 ifdef CONFIG_FUNCTION_TRACER
  34 PURGATORY_CFLAGS_REMOVE         += $(CC_FLAGS_FTRACE)
  35 endif
  36
  37 ifdef CONFIG_STACKPROTECTOR
  38 PURGATORY_CFLAGS_REMOVE         += -fstack-protector
  39 endif
  40
  41 ifdef CONFIG_STACKPROTECTOR_STRONG
  42 PURGATORY_CFLAGS_REMOVE         += -fstack-protector-strong
  43 endif
  44
  45 ifdef CONFIG_RETPOLINE
  46 PURGATORY_CFLAGS_REMOVE         += $(RETPOLINE_CFLAGS)
  47 endif
  48
  49 CFLAGS_REMOVE_purgatory.o       += $(PURGATORY_CFLAGS_REMOVE)
  50 CFLAGS_purgatory.o              += $(PURGATORY_CFLAGS)
  51
  52 CFLAGS_REMOVE_sha256.o          += $(PURGATORY_CFLAGS_REMOVE)
  53 CFLAGS_sha256.o                 += $(PURGATORY_CFLAGS)
  54
  55 CFLAGS_REMOVE_string.o          += $(PURGATORY_CFLAGS_REMOVE)
  56 CFLAGS_string.o                 += $(PURGATORY_CFLAGS)
  57
  58 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
  59                 $(call if_changed,ld)
  60
  61 targets += kexec-purgatory.c
  62
  63 quiet_cmd_bin2c = BIN2C   $@
  64       cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
  65
  66 $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
  67         $(call if_changed,bin2c)
  68
  69 obj-$(CONFIG_KEXEC_FILE)        += kexec-purgatory.o