1/* Definitions of target machine for GNU compiler. 2 For ARM with ELF obj format. 3 Copyright (C) 1995-2015 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 Under Section 7 of GPL version 3, you are granted additional 20 permissions described in the GCC Runtime Library Exception, version 21 3.1, as published by the Free Software Foundation. 22 23 You should have received a copy of the GNU General Public License and 24 a copy of the GCC Runtime Library Exception along with this program; 25 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 26 <http://www.gnu.org/licenses/>. */ 27 28#ifndef OBJECT_FORMAT_ELF 29 #error elf.h included before elfos.h 30#endif 31 32#ifndef LOCAL_LABEL_PREFIX 33#define LOCAL_LABEL_PREFIX "." 34#endif 35 36#ifndef SUBTARGET_CPP_SPEC 37#define SUBTARGET_CPP_SPEC "-D__ELF__" 38#endif 39 40#ifndef SUBTARGET_EXTRA_SPECS 41#define SUBTARGET_EXTRA_SPECS \ 42 { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \ 43 { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \ 44 SUBSUBTARGET_EXTRA_SPECS 45#endif 46 47#ifndef SUBTARGET_EXTRA_ASM_SPEC 48#define SUBTARGET_EXTRA_ASM_SPEC "" 49#endif 50 51#ifndef SUBTARGET_ASM_FLOAT_SPEC 52#define SUBTARGET_ASM_FLOAT_SPEC "\ 53%{mapcs-float:-mfloat}" 54#endif 55 56#undef SUBSUBTARGET_EXTRA_SPECS 57#define SUBSUBTARGET_EXTRA_SPECS 58 59#ifndef ASM_SPEC 60#define ASM_SPEC "\ 61%{mbig-endian:-EB} \ 62%{mlittle-endian:-EL} \ 63%(asm_cpu_spec) \ 64%{mapcs-*:-mapcs-%*} \ 65%(subtarget_asm_float_spec) \ 66%{mthumb-interwork:-mthumb-interwork} \ 67%{mfloat-abi=*} %{mfpu=*} \ 68%(subtarget_extra_asm_spec)" 69#endif 70 71/* The ARM uses @ are a comment character so we need to redefine 72 TYPE_OPERAND_FMT. */ 73#undef TYPE_OPERAND_FMT 74#define TYPE_OPERAND_FMT "%%%s" 75 76/* We might need a ARM specific header to function declarations. */ 77#undef ASM_DECLARE_FUNCTION_NAME 78#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 79 do \ 80 { \ 81 ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \ 82 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ 83 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ 84 ASM_OUTPUT_LABEL(FILE, NAME); \ 85 ARM_OUTPUT_FN_UNWIND (FILE, TRUE); \ 86 } \ 87 while (0) 88 89/* We might need an ARM specific trailer for function declarations. */ 90#undef ASM_DECLARE_FUNCTION_SIZE 91#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 92 do \ 93 { \ 94 ARM_OUTPUT_FN_UNWIND (FILE, FALSE); \ 95 if (!flag_inhibit_size_directive) \ 96 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 97 } \ 98 while (0) 99 100/* Define this macro if jump tables (for `tablejump' insns) should be 101 output in the text section, along with the assembler instructions. 102 Otherwise, the readonly data section is used. */ 103/* We put ARM and Thumb-2 jump tables in the text section, because it makes 104 the code more efficient, but for Thumb-1 it's better to put them out of 105 band unless we are generating compressed tables. */ 106#define JUMP_TABLES_IN_TEXT_SECTION \ 107 (TARGET_32BIT || (TARGET_THUMB && (optimize_size || flag_pic))) 108 109#ifndef LINK_SPEC 110#define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" 111#endif 112 113/* Run-time Target Specification. */ 114#ifndef TARGET_DEFAULT 115#define TARGET_DEFAULT (MASK_APCS_FRAME) 116#endif 117 118#ifndef MULTILIB_DEFAULTS 119#define MULTILIB_DEFAULTS \ 120 { "marm", "mlittle-endian", "mfloat-abi=soft", "mno-thumb-interwork", "fno-leading-underscore" } 121#endif 122 123#define TARGET_ASM_FILE_START_APP_OFF true 124#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 125 126 127/* Output an element in the static constructor array. */ 128#undef TARGET_ASM_CONSTRUCTOR 129#define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor 130 131#undef TARGET_ASM_DESTRUCTOR 132#define TARGET_ASM_DESTRUCTOR arm_elf_asm_destructor 133 134/* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */ 135#define NEED_PLT_RELOC flag_pic 136#define NEED_GOT_RELOC flag_pic 137 138/* The ELF assembler handles GOT addressing differently to NetBSD. */ 139#define GOT_PCREL 0 140 141/* Align output to a power of two. Note ".align 0" is redundant, 142 and also GAS will treat it as ".align 2" which we do not want. */ 143#define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 144 do \ 145 { \ 146 if ((POWER) > 0) \ 147 fprintf (STREAM, "\t.align\t%d\n", POWER); \ 148 } \ 149 while (0) 150 151/* Horrible hack: We want to prevent some libgcc routines being included 152 for some multilibs. */ 153#ifndef __ARM_ARCH_6M__ 154#undef L_fixdfsi 155#undef L_fixunsdfsi 156#undef L_truncdfsf2 157#undef L_fixsfsi 158#undef L_fixunssfsi 159#undef L_floatdidf 160#undef L_floatdisf 161#undef L_floatundidf 162#undef L_floatundisf 163#endif 164 165