gcc/config/aarch64/aarch64-elf.h

   1 /* Machine description for AArch64 architecture.
   2    Copyright (C) 2009-2015 Free Software Foundation, Inc.
   3    Contributed by ARM Ltd.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_AARCH64_ELF_H
  22 #define GCC_AARCH64_ELF_H
  23
  24
  25 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
  26   aarch64_asm_output_labelref (FILE, NAME)
  27
  28 #define ASM_OUTPUT_DEF(FILE, NAME1, NAME2)      \
  29   do                                            \
  30     {                                           \
  31       assemble_name (FILE, NAME1);              \
  32       fputs (" = ", FILE);                      \
  33       assemble_name (FILE, NAME2);              \
  34       fputc ('\n', FILE);                       \
  35     } while (0)
  36
  37 #define TEXT_SECTION_ASM_OP     "\t.text"
  38 #define DATA_SECTION_ASM_OP     "\t.data"
  39 #define BSS_SECTION_ASM_OP      "\t.bss"
  40
  41 #define CTORS_SECTION_ASM_OP "\t.section\t.init_array,\"aw\",%init_array"
  42 #define DTORS_SECTION_ASM_OP "\t.section\t.fini_array,\"aw\",%fini_array"
  43
  44 #undef INIT_SECTION_ASM_OP
  45 #undef FINI_SECTION_ASM_OP
  46 #define INIT_ARRAY_SECTION_ASM_OP CTORS_SECTION_ASM_OP
  47 #define FINI_ARRAY_SECTION_ASM_OP DTORS_SECTION_ASM_OP
  48
  49 /* Since we use .init_array/.fini_array we don't need the markers at
  50    the start and end of the ctors/dtors arrays.  */
  51 #define CTOR_LIST_BEGIN asm (CTORS_SECTION_ASM_OP)
  52 #define CTOR_LIST_END           /* empty */
  53 #define DTOR_LIST_BEGIN asm (DTORS_SECTION_ASM_OP)
  54 #define DTOR_LIST_END           /* empty */
  55
  56 #undef TARGET_ASM_CONSTRUCTOR
  57 #define TARGET_ASM_CONSTRUCTOR aarch64_elf_asm_constructor
  58
  59 #undef TARGET_ASM_DESTRUCTOR
  60 #define TARGET_ASM_DESTRUCTOR aarch64_elf_asm_destructor
  61
  62 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  63 /* Support for -falign-* switches.  Use .p2align to ensure that code
  64    sections are padded with NOP instructions, rather than zeros.  */
  65 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)          \
  66   do                                                            \
  67     {                                                           \
  68       if ((LOG) != 0)                                           \
  69         {                                                       \
  70           if ((MAX_SKIP) == 0)                                  \
  71             fprintf ((FILE), "\t.p2align %d\n", (int) (LOG));   \
  72           else                                                  \
  73             fprintf ((FILE), "\t.p2align %d,,%d\n",             \
  74                      (int) (LOG), (int) (MAX_SKIP));            \
  75         }                                                       \
  76     } while (0)
  77
  78 #endif /* HAVE_GAS_MAX_SKIP_P2ALIGN */
  79
  80 #define JUMP_TABLES_IN_TEXT_SECTION 0
  81
  82 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)              \
  83   do {                                                                  \
  84     switch (GET_MODE (BODY))                                            \
  85       {                                                                 \
  86       case QImode:                                                      \
  87         asm_fprintf (STREAM, "\t.byte\t(%LL%d - %LLrtx%d) / 4\n",       \
  88                      VALUE, REL);                                       \
  89         break;                                                          \
  90       case HImode:                                                      \
  91         asm_fprintf (STREAM, "\t.2byte\t(%LL%d - %LLrtx%d) / 4\n",      \
  92                      VALUE, REL);                                       \
  93         break;                                                          \
  94       case SImode:                                                      \
  95       case DImode: /* See comment in aarch64_output_casesi.  */         \
  96         asm_fprintf (STREAM, "\t.word\t(%LL%d - %LLrtx%d) / 4\n",       \
  97                      VALUE, REL);                                       \
  98         break;                                                          \
  99       default:                                                          \
 100         gcc_unreachable ();                                             \
 101       }                                                                 \
 102   } while (0)
 103
 104 #define ASM_OUTPUT_ALIGN(STREAM, POWER)         \
 105   fprintf(STREAM, "\t.align\t%d\n", (int)POWER)
 106
 107 #define ASM_COMMENT_START "//"
 108
 109 #define LOCAL_LABEL_PREFIX      "."
 110 #define USER_LABEL_PREFIX       ""
 111
 112 #define GLOBAL_ASM_OP "\t.global\t"
 113
 114 #ifdef TARGET_BIG_ENDIAN_DEFAULT
 115 #define ENDIAN_SPEC "-mbig-endian"
 116 #else
 117 #define ENDIAN_SPEC "-mlittle-endian"
 118 #endif
 119
 120 #if TARGET_DATA_MODEL == 1
 121 #define ABI_SPEC  "-mabi=lp64"
 122 #define MULTILIB_DEFAULTS { "mabi=lp64" }
 123 #elif TARGET_DATA_MODEL == 2
 124 #define ABI_SPEC  "-mabi=ilp32"
 125 #define MULTILIB_DEFAULTS { "mabi=ilp32" }
 126 #else
 127 #error "Unknown or undefined TARGET_DATA_MODEL!"
 128 #endif
 129
 130 /* Force the default endianness and ABI flags onto the command line
 131    in order to make the other specs easier to write.  */
 132 #undef DRIVER_SELF_SPECS
 133 #define DRIVER_SELF_SPECS \
 134   " %{!mbig-endian:%{!mlittle-endian:" ENDIAN_SPEC "}}" \
 135   " %{!mabi=*:" ABI_SPEC "}" \
 136   MCPU_MTUNE_NATIVE_SPECS
 137
 138 #ifdef HAVE_AS_MABI_OPTION
 139 #define ASM_MABI_SPEC   "%{mabi=*:-mabi=%*}"
 140 #else
 141 #define ASM_MABI_SPEC   "%{mabi=lp64:}"
 142 #endif
 143
 144 #ifndef ASM_SPEC
 145 #define ASM_SPEC "\
 146 %{mbig-endian:-EB} \
 147 %{mlittle-endian:-EL} \
 148 %{march=*:-march=%*} \
 149 %(asm_cpu_spec)" \
 150 ASM_MABI_SPEC
 151 #endif
 152
 153 #undef TYPE_OPERAND_FMT
 154 #define TYPE_OPERAND_FMT        "%%%s"
 155
 156 #undef TARGET_ASM_NAMED_SECTION
 157 #define TARGET_ASM_NAMED_SECTION  aarch64_elf_asm_named_section
 158
 159 /* Stabs debug not required.  */
 160 #undef DBX_DEBUGGING_INFO
 161
 162 #endif /* GCC_AARCH64_ELF_H */