1 /* Definitions of target machine for GNU compiler. 2 For ARM with ELF obj format. 3 Copyright (C) 1995-2013 Free Software Foundation, Inc. 4 Contributed by Philip Blundell <philb@gnu.org> and 5 Catherine Moore <clm@cygnus.com> 6 7 This file is part of GCC. 8 9 GCC is free software; you can redistribute it and/or modify it 10 under the terms of the GNU General Public License as published 11 by the Free Software Foundation; either version 3, or (at your 12 option) any later version. 13 14 GCC is distributed in the hope that it will be useful, but WITHOUT 15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 17 License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GCC; see the file COPYING3. If not see 21 <http://www.gnu.org/licenses/>. */ 22 23 #ifndef OBJECT_FORMAT_ELF 24 #error elf.h included before elfos.h 25 #endif 26 27 #ifndef LOCAL_LABEL_PREFIX 28 #define LOCAL_LABEL_PREFIX "." 29 #endif 30 31 #ifndef SUBTARGET_CPP_SPEC 32 #define SUBTARGET_CPP_SPEC "-D__ELF__" 33 #endif 34 35 #ifndef SUBTARGET_EXTRA_SPECS 36 #define SUBTARGET_EXTRA_SPECS \ 37 { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \ 38 { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \ 39 SUBSUBTARGET_EXTRA_SPECS 40 #endif 41 42 #ifndef SUBTARGET_EXTRA_ASM_SPEC 43 #define SUBTARGET_EXTRA_ASM_SPEC "" 44 #endif 45 46 #ifndef SUBTARGET_ASM_FLOAT_SPEC 47 #define SUBTARGET_ASM_FLOAT_SPEC "\ 48 %{mapcs-float:-mfloat}" 49 #endif 50 51 #undef SUBSUBTARGET_EXTRA_SPECS 52 #define SUBSUBTARGET_EXTRA_SPECS 53 54 #ifndef ASM_SPEC 55 #define ASM_SPEC "\ 56 %{mbig-endian:-EB} \ 57 %{mlittle-endian:-EL} \ 58 %(asm_cpu_spec) \ 59 %{mapcs-*:-mapcs-%*} \ 60 %(subtarget_asm_float_spec) \ 61 %{mthumb-interwork:-mthumb-interwork} \ 62 %{mfloat-abi=*} %{mfpu=*} \ 63 %(subtarget_extra_asm_spec)" 64 #endif 65 66 /* The ARM uses @ are a comment character so we need to redefine 67 TYPE_OPERAND_FMT. */ 68 #undef TYPE_OPERAND_FMT 69 #define TYPE_OPERAND_FMT "%%%s" 70 71 /* We might need a ARM specific header to function declarations. */ 72 #undef ASM_DECLARE_FUNCTION_NAME 73 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 74 do \ 75 { \ 76 ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \ 77 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ 78 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ 79 ASM_OUTPUT_LABEL(FILE, NAME); \ 80 ARM_OUTPUT_FN_UNWIND (FILE, TRUE); \ 81 } \ 82 while (0) 83 84 /* We might need an ARM specific trailer for function declarations. */ 85 #undef ASM_DECLARE_FUNCTION_SIZE 86 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 87 do \ 88 { \ 89 ARM_OUTPUT_FN_UNWIND (FILE, FALSE); \ 90 if (!flag_inhibit_size_directive) \ 91 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 92 } \ 93 while (0) 94 95 /* Define this macro if jump tables (for `tablejump' insns) should be 96 output in the text section, along with the assembler instructions. 97 Otherwise, the readonly data section is used. */ 98 /* We put ARM and Thumb-2 jump tables in the text section, because it makes 99 the code more efficient, but for Thumb-1 it's better to put them out of 100 band unless we are generating compressed tables. */ 101 #define JUMP_TABLES_IN_TEXT_SECTION \ 102 (TARGET_32BIT || (TARGET_THUMB && (optimize_size || flag_pic))) 103 104 #ifndef LINK_SPEC 105 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" 106 #endif 107 108 /* Run-time Target Specification. */ 109 #ifndef TARGET_DEFAULT 110 #define TARGET_DEFAULT (MASK_APCS_FRAME) 111 #endif 112 113 #ifndef MULTILIB_DEFAULTS 114 #define MULTILIB_DEFAULTS \ 115 { "marm", "mlittle-endian", "mfloat-abi=soft", "mno-thumb-interwork", "fno-leading-underscore" } 116 #endif 117 118 #define TARGET_ASM_FILE_START_APP_OFF true 119 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 120 121 122 /* Output an element in the static constructor array. */ 123 #undef TARGET_ASM_CONSTRUCTOR 124 #define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor 125 126 #undef TARGET_ASM_DESTRUCTOR 127 #define TARGET_ASM_DESTRUCTOR arm_elf_asm_destructor 128 129 /* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */ 130 #define NEED_PLT_RELOC flag_pic 131 #define NEED_GOT_RELOC flag_pic 132 133 /* The ELF assembler handles GOT addressing differently to NetBSD. */ 134 #define GOT_PCREL 0 135 136 /* Align output to a power of two. Note ".align 0" is redundant, 137 and also GAS will treat it as ".align 2" which we do not want. */ 138 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 139 do \ 140 { \ 141 if ((POWER) > 0) \ 142 fprintf (STREAM, "\t.align\t%d\n", POWER); \ 143 } \ 144 while (0) 145 146 /* Horrible hack: We want to prevent some libgcc routines being included 147 for some multilibs. */ 148 #ifndef __ARM_ARCH_6M__ 149 #undef L_fixdfsi 150 #undef L_fixunsdfsi 151 #undef L_truncdfsf2 152 #undef L_fixsfsi 153 #undef L_fixunssfsi 154 #undef L_floatdidf 155 #undef L_floatdisf 156 #undef L_floatundidf 157 /* XXXMRG: don't take this out, we need it! */ 158 # ifndef __NetBSD__ 159 #undef L_floatundisf 160 # endif 161 #endif 162