1 /* Definitions of target machine for GNU compiler. 2 For ARM with ELF obj format. 3 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2004, 2005, 2007, 4 2008 Free Software Foundation, Inc. 5 Contributed by Philip Blundell <philb (at) gnu.org> and 6 Catherine Moore <clm (at) cygnus.com> 7 8 This file is part of GCC. 9 10 GCC is free software; you can redistribute it and/or modify it 11 under the terms of the GNU General Public License as published 12 by the Free Software Foundation; either version 3, or (at your 13 option) any later version. 14 15 GCC is distributed in the hope that it will be useful, but WITHOUT 16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 17 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 18 License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with GCC; see the file COPYING3. If not see 22 <http://www.gnu.org/licenses/>. */ 23 24 #ifndef OBJECT_FORMAT_ELF 25 #error elf.h included before elfos.h 26 #endif 27 28 #ifndef LOCAL_LABEL_PREFIX 29 #define LOCAL_LABEL_PREFIX "." 30 #endif 31 32 #ifndef SUBTARGET_CPP_SPEC 33 #define SUBTARGET_CPP_SPEC "-D__ELF__" 34 #endif 35 36 #ifndef SUBTARGET_EXTRA_SPECS 37 #define SUBTARGET_EXTRA_SPECS \ 38 { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \ 39 { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \ 40 SUBSUBTARGET_EXTRA_SPECS 41 #endif 42 43 #ifndef SUBTARGET_EXTRA_ASM_SPEC 44 #define SUBTARGET_EXTRA_ASM_SPEC "" 45 #endif 46 47 #ifndef SUBTARGET_ASM_FLOAT_SPEC 48 #define SUBTARGET_ASM_FLOAT_SPEC "\ 49 %{mapcs-float:-mfloat}" 50 #endif 51 52 #undef SUBSUBTARGET_EXTRA_SPECS 53 #define SUBSUBTARGET_EXTRA_SPECS 54 55 #ifndef ASM_SPEC 56 #define ASM_SPEC "\ 57 %{mbig-endian:-EB} \ 58 %{mlittle-endian:-EL} \ 59 %{mcpu=*:-mcpu=%*} \ 60 %{march=*:-march=%*} \ 61 %{mapcs-*:-mapcs-%*} \ 62 %(subtarget_asm_float_spec) \ 63 %{mthumb-interwork:-mthumb-interwork} \ 64 %{msoft-float:-mfloat-abi=soft} %{mhard-float:-mfloat-abi=hard} \ 65 %{mfloat-abi=*} %{mfpu=*} \ 66 %(subtarget_extra_asm_spec)" 67 #endif 68 69 /* The ARM uses @ are a comment character so we need to redefine 70 TYPE_OPERAND_FMT. */ 71 #undef TYPE_OPERAND_FMT 72 #define TYPE_OPERAND_FMT "%%%s" 73 74 /* We might need a ARM specific header to function declarations. */ 75 #undef ASM_DECLARE_FUNCTION_NAME 76 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 77 do \ 78 { \ 79 ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \ 80 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ 81 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ 82 ASM_OUTPUT_LABEL(FILE, NAME); \ 83 ARM_OUTPUT_FN_UNWIND (FILE, TRUE); \ 84 } \ 85 while (0) 86 87 /* We might need an ARM specific trailer for function declarations. */ 88 #undef ASM_DECLARE_FUNCTION_SIZE 89 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 90 do \ 91 { \ 92 ARM_OUTPUT_FN_UNWIND (FILE, FALSE); \ 93 if (!flag_inhibit_size_directive) \ 94 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 95 } \ 96 while (0) 97 98 /* Define this macro if jump tables (for `tablejump' insns) should be 99 output in the text section, along with the assembler instructions. 100 Otherwise, the readonly data section is used. */ 101 /* We put ARM and Thumb-2 jump tables in the text section, because it makes 102 the code more efficient, but for Thumb-1 it's better to put them out of 103 band. */ 104 #define JUMP_TABLES_IN_TEXT_SECTION (TARGET_32BIT) 105 106 #ifndef LINK_SPEC 107 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" 108 #endif 109 110 /* Run-time Target Specification. */ 111 #ifndef TARGET_VERSION 112 #define TARGET_VERSION fputs (" (ARM/elf)", stderr) 113 #endif 114 115 #ifndef TARGET_DEFAULT 116 #define TARGET_DEFAULT (MASK_APCS_FRAME) 117 #endif 118 119 #ifndef MULTILIB_DEFAULTS 120 #define MULTILIB_DEFAULTS \ 121 { "marm", "mlittle-endian", "msoft-float", "mno-thumb-interwork", "fno-leading-underscore" } 122 #endif 123 124 #define TARGET_ASM_FILE_START_APP_OFF true 126 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 127 128 130 /* Output an element in the static constructor array. */ 131 #undef TARGET_ASM_CONSTRUCTOR 132 #define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor 133 134 #undef TARGET_ASM_DESTRUCTOR 135 #define TARGET_ASM_DESTRUCTOR arm_elf_asm_destructor 136 137 /* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */ 138 #define NEED_PLT_RELOC flag_pic 139 #define NEED_GOT_RELOC flag_pic 140 141 /* The ELF assembler handles GOT addressing differently to NetBSD. */ 142 #define GOT_PCREL 0 143 144 /* Align output to a power of two. Note ".align 0" is redundant, 145 and also GAS will treat it as ".align 2" which we do not want. */ 146 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 147 do \ 148 { \ 149 if ((POWER) > 0) \ 150 fprintf (STREAM, "\t.align\t%d\n", POWER); \ 151 } \ 152 while (0) 153 154 /* Horrible hack: We want to prevent some libgcc routines being included 155 for some multilibs. */ 156 #ifndef __ARM_ARCH_6M__ 157 #undef L_fixdfsi 158 #undef L_fixunsdfsi 159 #undef L_truncdfsf2 160 #undef L_fixsfsi 161 #undef L_fixunssfsi 162 #undef L_floatdidf 163 #undef L_floatdisf 164 #undef L_floatundidf 165 #undef L_floatundisf 166 #endif 167 168
