arch/x86/config.mk

   1 # SPDX-License-Identifier: GPL-2.0+
   2 #
   3 # (C) Copyright 2000-2002
   4 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5
   6 PLATFORM_CPPFLAGS += -fomit-frame-pointer
   7 PF_CPPFLAGS_X86   := $(call cc-option, -fno-toplevel-reorder, \
   8                      $(call cc-option, -fno-unit-at-a-time))
   9
  10 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
  11 PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
  12
  13 ifdef CONFIG_SPL_BUILD
  14 IS_32BIT := y
  15 else
  16 ifndef CONFIG_X86_64
  17 IS_32BIT := y
  18 endif
  19 endif
  20
  21 EFI_IS_32BIT := $(IS_32BIT)
  22 ifdef CONFIG_EFI_STUB_64BIT
  23 EFI_IS_32BIT :=
  24 endif
  25
  26 ifeq ($(IS_32BIT),y)
  27 PLATFORM_CPPFLAGS += -march=i386 -m32
  28 else
  29 PLATFORM_CPPFLAGS += $(if $(CONFIG_SPL_BUILD),,-fpic) -fno-common -march=core2 -m64
  30
  31 ifndef CONFIG_X86_HARDFP
  32 PLATFORM_CPPFLAGS += -mno-mmx -mno-sse
  33 endif
  34
  35 endif # IS_32BIT
  36
  37 PLATFORM_RELFLAGS += -fdata-sections -ffunction-sections -fvisibility=hidden
  38
  39 KBUILD_LDFLAGS += -Bsymbolic -Bsymbolic-functions
  40 KBUILD_LDFLAGS += -m $(if $(IS_32BIT),elf_i386,elf_x86_64)
  41
  42 # This is used in the top-level Makefile which does not include
  43 # KBUILD_LDFLAGS
  44 LDFLAGS_EFI_PAYLOAD := -Bsymbolic -Bsymbolic-functions -shared --no-undefined \
  45                        -s -zexecstack
  46
  47 OBJCOPYFLAGS_EFI := -j .text -j .sdata -j .data -j .dynamic -j .dynsym \
  48         -j .rel -j .rela -j .reloc --strip-all
  49
  50 # Compiler flags to be added when building UEFI applications
  51 CFLAGS_EFI := -fpic -fshort-wchar
  52 # Compiler flags to be removed when building UEFI applications
  53 CFLAGS_NON_EFI := -mregparm=3 -fstack-protector-strong
  54
  55 ifeq ($(IS_32BIT),y)
  56 EFIPAYLOAD_BFDARCH = i386
  57 else
  58 CFLAGS_EFI += $(call cc-option, -mno-red-zone)
  59 EFIPAYLOAD_BFDARCH = x86_64
  60 endif
  61
  62 ifeq ($(EFI_IS_32BIT),y)
  63 EFIARCH = ia32
  64 EFIPAYLOAD_BFDTARGET = elf32-i386
  65 else
  66 EFIARCH = x86_64
  67 EFIPAYLOAD_BFDTARGET = elf64-x86-64
  68 endif
  69
  70 LDSCRIPT_EFI := $(srctree)/arch/x86/lib/elf_$(EFIARCH)_efi.lds
  71 EFISTUB := crt0_$(EFIARCH)_efi.o reloc_$(EFIARCH)_efi.o
  72 OBJCOPYFLAGS_EFI += --target=efi-app-$(EFIARCH)
  73
  74 CPPFLAGS_REMOVE_crt0-efi-$(EFIARCH).o += $(CFLAGS_NON_EFI)
  75 CPPFLAGS_crt0-efi-$(EFIARCH).o += $(CFLAGS_EFI)
  76
  77 ifeq ($(CONFIG_EFI_APP),y)
  78
  79 PLATFORM_CPPFLAGS += $(CFLAGS_EFI)
  80 LDFLAGS_FINAL += -znocombreloc -shared
  81 LDSCRIPT := $(LDSCRIPT_EFI)
  82
  83 else
  84
  85 ifeq ($(IS_32BIT),y)
  86 PLATFORM_CPPFLAGS += -mregparm=3
  87 endif
  88 KBUILD_LDFLAGS += --emit-relocs
  89 LDFLAGS_FINAL += --gc-sections $(if $(CONFIG_SPL_BUILD),,-pie)
  90
  91 endif
  92
  93 ifdef CONFIG_X86_64
  94 ifndef CONFIG_SPL_BUILD
  95 PLATFORM_CPPFLAGS += -D__x86_64__
  96 else
  97 PLATFORM_CPPFLAGS += -D__I386__
  98 endif
  99 else
 100 PLATFORM_CPPFLAGS += -D__I386__
 101 endif
 102
 103 ifdef CONFIG_EFI_STUB
 104
 105 ifdef CONFIG_EFI_STUB_64BIT
 106 EFI_LDS := elf_x86_64_efi.lds
 107 EFI_CRT0 := crt0_x86_64_efi.o
 108 EFI_RELOC := reloc_x86_64_efi.o
 109 else
 110 EFI_LDS := elf_ia32_efi.lds
 111 EFI_CRT0 := crt0_ia32_efi.o
 112 EFI_RELOC := reloc_ia32_efi.o
 113 endif
 114
 115 else
 116
 117 ifdef CONFIG_X86_64
 118 EFI_LDS := elf_x86_64_efi.lds
 119 EFI_CRT0 := crt0_x86_64_efi.o
 120 EFI_RELOC := reloc_x86_64_efi.o
 121 else
 122 EFI_LDS := elf_ia32_efi.lds
 123 EFI_CRT0 := crt0_ia32_efi.o
 124 EFI_RELOC := reloc_ia32_efi.o
 125 endif
 126
 127 endif
 128
 129 ifdef CONFIG_X86_64
 130 EFI_TARGET := --target=efi-app-x86_64
 131 else
 132 EFI_TARGET := --target=efi-app-ia32
 133 endif