gcc/config/arm/aout.h

   1 /* Definitions of target machine for GNU compiler, for ARM with a.out
   2    Copyright (C) 1995-2014 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rearnsha@armltd.co.uk).
   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
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    Under Section 7 of GPL version 3, you are granted additional
  18    permissions described in the GCC Runtime Library Exception, version
  19    3.1, as published by the Free Software Foundation.
  20
  21    You should have received a copy of the GNU General Public License and
  22    a copy of the GCC Runtime Library Exception along with this program;
  23    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24    <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef ASM_APP_ON
  27 #define ASM_APP_ON              ""
  28 #endif
  29 #ifndef ASM_APP_OFF
  30 #define ASM_APP_OFF             ""
  31 #endif
  32
  33 /* Switch to the text or data segment.  */
  34 #define TEXT_SECTION_ASM_OP     "\t.text"
  35 #define DATA_SECTION_ASM_OP     "\t.data"
  36 #define BSS_SECTION_ASM_OP      "\t.bss"
  37
  38 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
  39    make sure that this change is reflected in the function
  40    coff_arm_is_local_label_name() in bfd/coff-arm.c.  */
  41 #ifndef REGISTER_PREFIX
  42 #define REGISTER_PREFIX         ""
  43 #endif
  44
  45 #ifndef USER_LABEL_PREFIX
  46 #define USER_LABEL_PREFIX       "_"
  47 #endif
  48
  49 #ifndef LOCAL_LABEL_PREFIX
  50 #define LOCAL_LABEL_PREFIX      ""
  51 #endif
  52
  53 /* The assembler's names for the registers.  Note that the ?xx registers are
  54    there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15
  55    (each of which is overlaid on two S registers), although there are no
  56    actual single-precision registers which correspond to D16-D31.  */
  57 #ifndef REGISTER_NAMES
  58 #define REGISTER_NAMES                                          \
  59 {                                                               \
  60   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",               \
  61   "r8", "r9", "r10", "fp", "ip", "sp", "lr", "pc",              \
  62   "s0",  "s1",  "s2",  "s3",  "s4",  "s5",  "s6",  "s7",        \
  63   "s8",  "s9",  "s10", "s11", "s12", "s13", "s14", "s15",       \
  64   "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23",       \
  65   "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",       \
  66   "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19",       \
  67   "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23",       \
  68   "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27",       \
  69   "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31",       \
  70   "wr0",   "wr1",   "wr2",   "wr3",                             \
  71   "wr4",   "wr5",   "wr6",   "wr7",                             \
  72   "wr8",   "wr9",   "wr10",  "wr11",                            \
  73   "wr12",  "wr13",  "wr14",  "wr15",                            \
  74   "wcgr0", "wcgr1", "wcgr2", "wcgr3",                           \
  75   "cc", "vfpcc", "sfp", "afp"                                   \
  76 }
  77 #endif
  78
  79 #ifndef ADDITIONAL_REGISTER_NAMES
  80 #define ADDITIONAL_REGISTER_NAMES               \
  81 {                                               \
  82   {"a1", 0},                                    \
  83   {"a2", 1},                                    \
  84   {"a3", 2},                                    \
  85   {"a4", 3},                                    \
  86   {"v1", 4},                                    \
  87   {"v2", 5},                                    \
  88   {"v3", 6},                                    \
  89   {"v4", 7},                                    \
  90   {"v5", 8},                                    \
  91   {"v6", 9},                                    \
  92   {"rfp", 9}, /* Historical.  */                \
  93   {"sb", 9}, /* Historical.  */                 \
  94   {"v7", 10},                                   \
  95   {"sl", 10},   /* Historical.  */              \
  96   {"r11", 11},  /* fp */                        \
  97   {"r12", 12},  /* ip */                        \
  98   {"r13", 13},  /* sp */                        \
  99   {"r14", 14},  /* lr */                        \
 100   {"r15", 15}   /* pc */                        \
 101 }
 102 #endif
 103
 104 #ifndef OVERLAPPING_REGISTER_NAMES
 105 #define OVERLAPPING_REGISTER_NAMES              \
 106 {                                               \
 107   {"d0",  FIRST_VFP_REGNUM + 0,  2},            \
 108   {"d1",  FIRST_VFP_REGNUM + 2,  2},            \
 109   {"d2",  FIRST_VFP_REGNUM + 4,  2},            \
 110   {"d3",  FIRST_VFP_REGNUM + 6,  2},            \
 111   {"d4",  FIRST_VFP_REGNUM + 8,  2},            \
 112   {"d5",  FIRST_VFP_REGNUM + 10, 2},            \
 113   {"d6",  FIRST_VFP_REGNUM + 12, 2},            \
 114   {"d7",  FIRST_VFP_REGNUM + 14, 2},            \
 115   {"d8",  FIRST_VFP_REGNUM + 16, 2},            \
 116   {"d9",  FIRST_VFP_REGNUM + 18, 2},            \
 117   {"d10", FIRST_VFP_REGNUM + 20, 2},            \
 118   {"d11", FIRST_VFP_REGNUM + 22, 2},            \
 119   {"d12", FIRST_VFP_REGNUM + 24, 2},            \
 120   {"d13", FIRST_VFP_REGNUM + 26, 2},            \
 121   {"d14", FIRST_VFP_REGNUM + 28, 2},            \
 122   {"d15", FIRST_VFP_REGNUM + 30, 2},            \
 123   {"q0",  FIRST_VFP_REGNUM + 0,  4},            \
 124   {"q1",  FIRST_VFP_REGNUM + 4,  4},            \
 125   {"q2",  FIRST_VFP_REGNUM + 8,  4},            \
 126   {"q3",  FIRST_VFP_REGNUM + 12, 4},            \
 127   {"q4",  FIRST_VFP_REGNUM + 16, 4},            \
 128   {"q5",  FIRST_VFP_REGNUM + 20, 4},            \
 129   {"q6",  FIRST_VFP_REGNUM + 24, 4},            \
 130   {"q7",  FIRST_VFP_REGNUM + 28, 4},            \
 131   {"q8",  FIRST_VFP_REGNUM + 32, 4},            \
 132   {"q9",  FIRST_VFP_REGNUM + 36, 4},            \
 133   {"q10", FIRST_VFP_REGNUM + 40, 4},            \
 134   {"q11", FIRST_VFP_REGNUM + 44, 4},            \
 135   {"q12", FIRST_VFP_REGNUM + 48, 4},            \
 136   {"q13", FIRST_VFP_REGNUM + 52, 4},            \
 137   {"q14", FIRST_VFP_REGNUM + 56, 4},            \
 138   {"q15", FIRST_VFP_REGNUM + 60, 4}             \
 139 }
 140 #endif
 141
 142 #ifndef NO_DOLLAR_IN_LABEL
 143 #define NO_DOLLAR_IN_LABEL 1
 144 #endif
 145
 146 /* Generate DBX debugging information.  riscix.h will undefine this because
 147    the native assembler does not support stabs.  */
 148 #define DBX_DEBUGGING_INFO 1
 149
 150 /* Acorn dbx moans about continuation chars, so don't use any.  */
 151 #ifndef DBX_CONTIN_LENGTH
 152 #define DBX_CONTIN_LENGTH  0
 153 #endif
 154
 155 /* Output a function label definition.  */
 156 #ifndef ASM_DECLARE_FUNCTION_NAME
 157 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 158   do                                                    \
 159     {                                                   \
 160       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 161       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 162     }                                                   \
 163   while (0)
 164 #endif
 165
 166 /* Globalizing directive for a label.  */
 167 #define GLOBAL_ASM_OP "\t.global\t"
 168
 169 /* Make an internal label into a string.  */
 170 #ifndef ASM_GENERATE_INTERNAL_LABEL
 171 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 172   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 173 #endif
 174
 175 /* Output an element of a dispatch table.  */
 176 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)                  \
 177   do                                                            \
 178     {                                                           \
 179       gcc_assert (!TARGET_THUMB2);                              \
 180       asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE);          \
 181     }                                                           \
 182   while (0)
 183
 184
 185 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions
 186    can be used.  For non-pic code where the offsets do not suitable for
 187    TBB/TBH the elements are output as absolute labels.  */
 188 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)              \
 189   do                                                                    \
 190     {                                                                   \
 191       if (TARGET_ARM)                                                   \
 192         asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE);                    \
 193       else if (TARGET_THUMB1)                                           \
 194         {                                                               \
 195           if (flag_pic || optimize_size)                                \
 196             {                                                           \
 197               switch (GET_MODE(body))                                   \
 198                 {                                                       \
 199                 case QImode:                                            \
 200                   asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",    \
 201                                VALUE, REL);                             \
 202                   break;                                                \
 203                 case HImode: /* TBH */                                  \
 204                   asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",   \
 205                                VALUE, REL);                             \
 206                   break;                                                \
 207                 case SImode:                                            \
 208                   asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n",        \
 209                                VALUE, REL);                             \
 210                   break;                                                \
 211                 default:                                                \
 212                   gcc_unreachable();                                    \
 213                 }                                                       \
 214             }                                                           \
 215           else                                                          \
 216             asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);          \
 217         }                                                               \
 218       else /* Thumb-2 */                                                \
 219         {                                                               \
 220           switch (GET_MODE(body))                                       \
 221             {                                                           \
 222             case QImode: /* TBB */                                      \
 223               asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",        \
 224                            VALUE, REL);                                 \
 225               break;                                                    \
 226             case HImode: /* TBH */                                      \
 227               asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",       \
 228                            VALUE, REL);                                 \
 229               break;                                                    \
 230             case SImode:                                                \
 231               if (flag_pic)                                             \
 232                 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \
 233               else                                                      \
 234                 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);      \
 235               break;                                                    \
 236             default:                                                    \
 237               gcc_unreachable();                                        \
 238             }                                                           \
 239         }                                                               \
 240     }                                                                   \
 241   while (0)
 242
 243
 244 #undef  ASM_OUTPUT_ASCII
 245 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 246   output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN)
 247
 248 /* Output a gap.  In fact we fill it with nulls.  */
 249 #undef  ASM_OUTPUT_SKIP
 250 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 251   fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES))
 252
 253 /* Align output to a power of two.  Horrible /bin/as.  */
 254 #ifndef ASM_OUTPUT_ALIGN
 255 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 256   do                                                    \
 257     {                                                   \
 258       register int amount = 1 << (POWER);               \
 259                                                         \
 260       if (amount == 2)                                  \
 261         fprintf (STREAM, "\t.even\n");                  \
 262       else if (amount != 1)                             \
 263         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 264     }                                                   \
 265   while (0)
 266 #endif
 267
 268 /* Output a common block.  */
 269 #ifndef ASM_OUTPUT_COMMON
 270 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 271   do                                                    \
 272     {                                                   \
 273       fprintf (STREAM, "\t.comm\t");                    \
 274       assemble_name (STREAM, NAME);                     \
 275       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 276                    (int)(ROUNDED), (int)(SIZE));        \
 277     }                                                   \
 278   while (0)
 279 #endif
 280
 281 /* Output a local common block.  /bin/as can't do this, so hack a
 282    `.space' into the bss segment.  Note that this is *bad* practice,
 283    which is guaranteed NOT to work since it doesn't define STATIC
 284    COMMON space but merely STATIC BSS space.  */
 285 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 286 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 287   do                                                                    \
 288     {                                                                   \
 289       switch_to_section (bss_section);                                  \
 290       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 291       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 292       fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE));                  \
 293     }                                                                   \
 294   while (0)
 295 #endif
 296
 297 /* Output a zero-initialized block.  */
 298 #ifndef ASM_OUTPUT_ALIGNED_BSS
 299 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 300   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 301 #endif
 302
 303 #ifndef ASM_COMMENT_START
 304 #define ASM_COMMENT_START       "@"
 305 #endif
 306
 307 /* This works for GAS and some other assemblers.  */
 308 #define SET_ASM_OP              "\t.set\t"