arch/riscv/purgatory/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 OBJECT_FILES_NON_STANDARD := y
   3
   4 purgatory-y := purgatory.o sha256.o entry.o string.o ctype.o rvstring.o memset.o
   5
   6 targets += $(purgatory-y)
   7 PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
   8
   9 $(obj)/string.o: $(srctree)/lib/string.c FORCE
  10         $(call if_changed_rule,cc_o_c)
  11
  12 $(obj)/ctype.o: $(srctree)/lib/ctype.c FORCE
  13         $(call if_changed_rule,cc_o_c)
  14
  15 $(obj)/rvstring.o: $(srctree)/arch/riscv/lib/string.c FORCE
  16         $(call if_changed_rule,cc_o_c)
  17
  18 $(obj)/memset.o: $(srctree)/arch/riscv/lib/memset.S FORCE
  19         $(call if_changed_rule,as_o_S)
  20
  21 $(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
  22         $(call if_changed_rule,cc_o_c)
  23
  24 CFLAGS_sha256.o := -D__DISABLE_EXPORTS
  25 CFLAGS_string.o := -D__DISABLE_EXPORTS
  26 CFLAGS_ctype.o := -D__DISABLE_EXPORTS
  27
  28 # When linking purgatory.ro with -r unresolved symbols are not checked,
  29 # also link a purgatory.chk binary without -r to check for unresolved symbols.
  30 PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib
  31 LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS)
  32 LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS)
  33 targets += purgatory.ro purgatory.chk
  34
  35 # Sanitizer, etc. runtimes are unavailable and cannot be linked here.
  36 GCOV_PROFILE    := n
  37 KASAN_SANITIZE  := n
  38 UBSAN_SANITIZE  := n
  39 KCSAN_SANITIZE  := n
  40 KCOV_INSTRUMENT := n
  41
  42 # These are adjustments to the compiler flags used for objects that
  43 # make up the standalone purgatory.ro
  44
  45 PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
  46 PURGATORY_CFLAGS := -mcmodel=medany -ffreestanding -fno-zero-initialized-in-bss
  47 PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
  48 PURGATORY_CFLAGS += -fno-stack-protector -g0
  49
  50 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
  51 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
  52 # sure how to relocate those.
  53 ifdef CONFIG_FUNCTION_TRACER
  54 PURGATORY_CFLAGS_REMOVE         += $(CC_FLAGS_FTRACE)
  55 endif
  56
  57 ifdef CONFIG_STACKPROTECTOR
  58 PURGATORY_CFLAGS_REMOVE         += -fstack-protector
  59 endif
  60
  61 ifdef CONFIG_STACKPROTECTOR_STRONG
  62 PURGATORY_CFLAGS_REMOVE         += -fstack-protector-strong
  63 endif
  64
  65 CFLAGS_REMOVE_purgatory.o       += $(PURGATORY_CFLAGS_REMOVE)
  66 CFLAGS_purgatory.o              += $(PURGATORY_CFLAGS)
  67
  68 CFLAGS_REMOVE_sha256.o          += $(PURGATORY_CFLAGS_REMOVE)
  69 CFLAGS_sha256.o                 += $(PURGATORY_CFLAGS)
  70
  71 CFLAGS_REMOVE_string.o          += $(PURGATORY_CFLAGS_REMOVE)
  72 CFLAGS_string.o                 += $(PURGATORY_CFLAGS)
  73
  74 CFLAGS_REMOVE_ctype.o           += $(PURGATORY_CFLAGS_REMOVE)
  75 CFLAGS_ctype.o                  += $(PURGATORY_CFLAGS)
  76
  77 AFLAGS_REMOVE_entry.o           += -Wa,-gdwarf-2
  78 AFLAGS_REMOVE_memcpy.o          += -Wa,-gdwarf-2
  79 AFLAGS_REMOVE_memset.o          += -Wa,-gdwarf-2
  80
  81 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
  82                 $(call if_changed,ld)
  83
  84 $(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE
  85                 $(call if_changed,ld)
  86
  87 $(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk
  88
  89 obj-y += kexec-purgatory.o