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 4 Free Software Foundation, Inc. 5 Contributed by Philip Blundell <philb@gnu.org> and 6 Catherine Moore <clm@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 2, 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 COPYING. If not, write to 22 the Free Software Foundation, 51 Franklin Street, Fifth Floor, 23 Boston, MA 02110-1301, USA. */ 24 25#ifndef OBJECT_FORMAT_ELF 26 #error elf.h included before elfos.h 27#endif 28 29#ifndef LOCAL_LABEL_PREFIX 30#define LOCAL_LABEL_PREFIX "." 31#endif 32 33#ifndef SUBTARGET_CPP_SPEC 34#define SUBTARGET_CPP_SPEC "-D__ELF__" 35#endif 36 37#ifndef SUBTARGET_EXTRA_SPECS 38#define SUBTARGET_EXTRA_SPECS \ 39 { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \ 40 { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, 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#ifndef ASM_SPEC 53#define ASM_SPEC "\ 54%{mbig-endian:-EB} \ 55%{mlittle-endian:-EL} \ 56%{mcpu=*:-mcpu=%*} \ 57%{march=*:-march=%*} \ 58%{mapcs-*:-mapcs-%*} \ 59%(subtarget_asm_float_spec) \ 60%{mthumb-interwork:-mthumb-interwork} \ 61%{msoft-float:-mfloat-abi=soft} %{mhard-float:-mfloat-abi=hard} \ 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 ARM_DECLARE_FUNCTION_SIZE (FILE, FNAME, DECL); \ 91 if (!flag_inhibit_size_directive) \ 92 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 93 } \ 94 while (0) 95 96/* Define this macro if jump tables (for `tablejump' insns) should be 97 output in the text section, along with the assembler instructions. 98 Otherwise, the readonly data section is used. */ 99/* We put ARM jump tables in the text section, because it makes the code 100 more efficient, but for Thumb it's better to put them out of band. */ 101#define JUMP_TABLES_IN_TEXT_SECTION (TARGET_ARM) 102 103#ifndef LINK_SPEC 104#define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" 105#endif 106 107/* Run-time Target Specification. */ 108#ifndef TARGET_VERSION 109#define TARGET_VERSION fputs (" (ARM/elf)", stderr) 110#endif 111 112#ifndef TARGET_DEFAULT 113#define TARGET_DEFAULT (MASK_APCS_FRAME) 114#endif 115 116#ifndef MULTILIB_DEFAULTS 117#define MULTILIB_DEFAULTS \ 118 { "marm", "mlittle-endian", "msoft-float", "mno-thumb-interwork", "fno-leading-underscore" } 119#endif 120 121#define TARGET_ASM_FILE_START_APP_OFF true 122#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 123 124 125/* Output an element in the static constructor array. */ 126#undef TARGET_ASM_CONSTRUCTOR 127#define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor 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/* Biggest alignment supported by the object file format of this 137 machine. Use this macro to limit the alignment which can be 138 specified using the `__attribute__ ((aligned (N)))' construct. If 139 not defined, the default value is `BIGGEST_ALIGNMENT'. */ 140#define MAX_OFILE_ALIGNMENT (32768 * 8) 141 142/* Align output to a power of two. Note ".align 0" is redundant, 143 and also GAS will treat it as ".align 2" which we do not want. */ 144#define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 145 do \ 146 { \ 147 if ((POWER) > 0) \ 148 fprintf (STREAM, "\t.align\t%d\n", POWER); \ 149 } \ 150 while (0) 151 152/* The EABI doesn't provide a way of implementing init_priority. */ 153#define SUPPORTS_INIT_PRIORITY (!TARGET_AAPCS_BASED) 154