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 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, 59 Temple Place - Suite 330, 23 Boston, MA 02111-1307, USA. */ 24 25 #ifndef OBJECT_FORMAT_ELF 26 #error elf.h included before elfos.h 27 #endif btoc32(int c)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} %{msoft-float:-mfpu=softfpa}" 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 %(subtarget_extra_asm_spec)" 62 #endif 63 64 /* The ARM uses @ are a comment character so we need to redefine 65 TYPE_OPERAND_FMT. */ 66 #undef TYPE_OPERAND_FMT 67 #define TYPE_OPERAND_FMT "%%%s" 68 69 /* We might need a ARM specific header to function declarations. */ 70 #undef ASM_DECLARE_FUNCTION_NAME 71 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 72 do \ 73 { \ 74 ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \ 75 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ 76 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ 77 ASM_OUTPUT_LABEL(FILE, NAME); \ 78 } \ 79 while (0) 80 81 /* We might need an ARM specific trailer for function declarations. */ 82 #undef ASM_DECLARE_FUNCTION_SIZE 83 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 84 do \ 85 { \ 86 ARM_DECLARE_FUNCTION_SIZE (FILE, FNAME, DECL); \ 87 if (!flag_inhibit_size_directive) \ 88 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 89 } \ 90 while (0) 91 92 /* Define this macro if jump tables (for `tablejump' insns) should be 93 output in the text section, along with the assembler instructions. 94 Otherwise, the readonly data section is used. */ 95 /* We put ARM jump tables in the text section, because it makes the code 96 more efficient, but for Thumb it's better to put them out of band. */ 97 #define JUMP_TABLES_IN_TEXT_SECTION (TARGET_ARM) 98 99 #ifndef LINK_SPEC 100 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" 101 #endif 102 103 /* Run-time Target Specification. */ 104 #ifndef TARGET_VERSION 105 #define TARGET_VERSION fputs (" (ARM/elf)", stderr) 106 #endif 107 108 #ifndef TARGET_DEFAULT 109 #define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME | ARM_FLAG_MMU_TRAPS) 110 #endif 111 112 #ifndef MULTILIB_DEFAULTS 113 #define MULTILIB_DEFAULTS \ 114 { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" } 115 #endif 116 117 #define TARGET_ASM_FILE_START_APP_OFF true 118 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 119 120 #undef TARGET_ASM_NAMED_SECTION 121 #define TARGET_ASM_NAMED_SECTION arm_elf_asm_named_section 122 123 124 /* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */ 125 #define NEED_PLT_RELOC flag_pic 126 #define NEED_GOT_RELOC flag_pic 127 128 /* The ELF assembler handles GOT addressing differently to NetBSD. */ 129 #define GOT_PCREL 0 130 131 /* Biggest alignment supported by the object file format of this 132 machine. Use this macro to limit the alignment which can be 133 specified using the `__attribute__ ((aligned (N)))' construct. If 134 not defined, the default value is `BIGGEST_ALIGNMENT'. */ 135 #define MAX_OFILE_ALIGNMENT (32768 * 8) 136 137 /* Align output to a power of two. Note ".align 0" is redundant, 138 and also GAS will treat it as ".align 2" which we do not want. */ 139 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 140 do \ 141 { \ 142 if ((POWER) > 0) \ 143 fprintf (STREAM, "\t.align\t%d\n", POWER); \ 144 } \ 145 while (0) 146 147 #define SUPPORTS_INIT_PRIORITY 1 148