1 /* Definitions of target machine for GNU compiler. 2 For ARM with ELF obj format. 3 Copyright (C) 1995-2018 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=auto: %{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 arm_asm_declare_function_name 79 80 /* We might need an ARM specific trailer for function declarations. */ 81 #undef ASM_DECLARE_FUNCTION_SIZE 82 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 83 do \ 84 { \ 85 ARM_OUTPUT_FN_UNWIND (FILE, FALSE); \ 86 if (!flag_inhibit_size_directive) \ 87 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 88 } \ 89 while (0) 90 91 /* Define this macro if jump tables (for `tablejump' insns) should be 92 output in the text section, along with the assembler instructions. 93 Otherwise, the readonly data section is used. */ 94 /* We put ARM and Thumb-2 jump tables in the text section, because it makes 95 the code more efficient, but for Thumb-1 it's better to put them out of 96 band unless we are generating compressed tables. */ 97 #define JUMP_TABLES_IN_TEXT_SECTION \ 98 ((TARGET_32BIT || (TARGET_THUMB && (optimize_size || flag_pic))) \ 99 && !target_pure_code) 100 101 #ifndef LINK_SPEC 102 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X" 103 #endif 104 105 /* Run-time Target Specification. */ 106 #ifndef TARGET_DEFAULT 107 #define TARGET_DEFAULT (MASK_APCS_FRAME) 108 #endif 109 110 111 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 112 113 114 /* Output an element in the static constructor array. */ 115 #undef TARGET_ASM_CONSTRUCTOR 116 #define TARGET_ASM_CONSTRUCTOR arm_elf_asm_constructor 117 118 #undef TARGET_ASM_DESTRUCTOR 119 #define TARGET_ASM_DESTRUCTOR arm_elf_asm_destructor 120 121 /* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */ 122 #define NEED_PLT_RELOC flag_pic 123 #define NEED_GOT_RELOC flag_pic 124 125 /* The ELF assembler handles GOT addressing differently to NetBSD. */ 126 #define GOT_PCREL 0 127 128 /* Align output to a power of two. Note ".align 0" is redundant, 129 and also GAS will treat it as ".align 2" which we do not want. */ 130 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 131 do \ 132 { \ 133 if ((POWER) > 0) \ 134 fprintf (STREAM, "\t.align\t%d\n", POWER); \ 135 } \ 136 while (0) 137 138 /* Horrible hack: We want to prevent some libgcc routines being included 139 for some multilibs. The condition should match the one in 140 libgcc/config/arm/lib1funcs.S. */ 141 #if __ARM_ARCH_ISA_ARM || __ARM_ARCH_ISA_THUMB != 1 142 #undef L_fixdfsi 143 #undef L_fixunsdfsi 144 #undef L_truncdfsf2 145 #undef L_fixsfsi 146 #undef L_fixunssfsi 147 #undef L_floatdidf 148 #undef L_floatdisf 149 #undef L_floatundidf 150 #undef L_floatundisf 151 #endif 152 153