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 # Sanitizer, etc. runtimes are unavailable and cannot be linked here.
  19 GCOV_PROFILE    := n
  20 KASAN_SANITIZE  := n
  21 UBSAN_SANITIZE  := n
  22 KCOV_INSTRUMENT := n
  23
  24 # These are adjustments to the compiler flags used for objects that
  25 # make up the standalone purgatory.ro
  26
  27 PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
  28 PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss -g0
  29 PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
  30
  31 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
  32 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
  33 # sure how to relocate those.
  34 ifdef CONFIG_FUNCTION_TRACER
  35 PURGATORY_CFLAGS_REMOVE         += $(CC_FLAGS_FTRACE)
  36 endif
  37
  38 ifdef CONFIG_STACKPROTECTOR
  39 PURGATORY_CFLAGS_REMOVE         += -fstack-protector
  40 endif
  41
  42 ifdef CONFIG_STACKPROTECTOR_STRONG
  43 PURGATORY_CFLAGS_REMOVE         += -fstack-protector-strong
  44 endif
  45
  46 ifdef CONFIG_RETPOLINE
  47 PURGATORY_CFLAGS_REMOVE         += $(RETPOLINE_CFLAGS)
  48 endif
  49
  50 CFLAGS_REMOVE_purgatory.o       += $(PURGATORY_CFLAGS_REMOVE)
  51 CFLAGS_purgatory.o              += $(PURGATORY_CFLAGS)
  52
  53 CFLAGS_REMOVE_sha256.o          += $(PURGATORY_CFLAGS_REMOVE)
  54 CFLAGS_sha256.o                 += $(PURGATORY_CFLAGS)
  55
  56 CFLAGS_REMOVE_string.o          += $(PURGATORY_CFLAGS_REMOVE)
  57 CFLAGS_string.o                 += $(PURGATORY_CFLAGS)
  58
  59 AFLAGS_REMOVE_setup-x86_$(BITS).o       += -g -Wa,-gdwarf-2
  60 AFLAGS_REMOVE_entry64.o                 += -g -Wa,-gdwarf-2
  61
  62 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
  63                 $(call if_changed,ld)
  64
  65 targets += kexec-purgatory.c
  66
  67 quiet_cmd_bin2c = BIN2C   $@
  68       cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
  69
  70 $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
  71         $(call if_changed,bin2c)
  72
  73 obj-$(CONFIG_KEXEC_FILE)        += kexec-purgatory.o