gcc/config/arm/aout.h

   1 /* Definitions of target machine for GNU compiler, for ARM with a.out
   2    Copyright (C) 1995-2013 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    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 ASM_APP_ON
  22 #define ASM_APP_ON              ""
  23 #endif
  24 #ifndef ASM_APP_OFF
  25 #define ASM_APP_OFF             ""
  26 #endif
  27
  28 /* Switch to the text or data segment.  */
  29 #define TEXT_SECTION_ASM_OP     "\t.text"
  30 #define DATA_SECTION_ASM_OP     "\t.data"
  31 #define BSS_SECTION_ASM_OP      "\t.bss"
  32
  33 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
  34    make sure that this change is reflected in the function
  35    coff_arm_is_local_label_name() in bfd/coff-arm.c.  */
  36 #ifndef REGISTER_PREFIX
  37 #define REGISTER_PREFIX         ""
  38 #endif
  39
  40 #ifndef USER_LABEL_PREFIX
  41 #define USER_LABEL_PREFIX       "_"
  42 #endif
  43
  44 #ifndef LOCAL_LABEL_PREFIX
  45 #define LOCAL_LABEL_PREFIX      ""
  46 #endif
  47
  48 /* The assembler's names for the registers.  Note that the ?xx registers are
  49    there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15
  50    (each of which is overlaid on two S registers), although there are no
  51    actual single-precision registers which correspond to D16-D31.  */
  52 #ifndef REGISTER_NAMES
  53 #define REGISTER_NAMES                                          \
  54 {                                                               \
  55   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",               \
  56   "r8", "r9", "r10", "fp", "ip", "sp", "lr", "pc",              \
  57   "s0",  "s1",  "s2",  "s3",  "s4",  "s5",  "s6",  "s7",        \
  58   "s8",  "s9",  "s10", "s11", "s12", "s13", "s14", "s15",       \
  59   "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23",       \
  60   "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",       \
  61   "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19",       \
  62   "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23",       \
  63   "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27",       \
  64   "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31",       \
  65   "wr0",   "wr1",   "wr2",   "wr3",                             \
  66   "wr4",   "wr5",   "wr6",   "wr7",                             \
  67   "wr8",   "wr9",   "wr10",  "wr11",                            \
  68   "wr12",  "wr13",  "wr14",  "wr15",                            \
  69   "wcgr0", "wcgr1", "wcgr2", "wcgr3",                           \
  70   "cc", "vfpcc", "sfp", "afp"                                   \
  71 }
  72 #endif
  73
  74 #ifndef ADDITIONAL_REGISTER_NAMES
  75 #define ADDITIONAL_REGISTER_NAMES               \
  76 {                                               \
  77   {"a1", 0},                                    \
  78   {"a2", 1},                                    \
  79   {"a3", 2},                                    \
  80   {"a4", 3},                                    \
  81   {"v1", 4},                                    \
  82   {"v2", 5},                                    \
  83   {"v3", 6},                                    \
  84   {"v4", 7},                                    \
  85   {"v5", 8},                                    \
  86   {"v6", 9},                                    \
  87   {"rfp", 9}, /* Historical.  */                \
  88   {"sb", 9}, /* Historical.  */                 \
  89   {"v7", 10},                                   \
  90   {"sl", 10},   /* Historical.  */              \
  91   {"r11", 11},  /* fp */                        \
  92   {"r12", 12},  /* ip */                        \
  93   {"r13", 13},  /* sp */                        \
  94   {"r14", 14},  /* lr */                        \
  95   {"r15", 15}   /* pc */                        \
  96 }
  97 #endif
  98
  99 #ifndef OVERLAPPING_REGISTER_NAMES
 100 #define OVERLAPPING_REGISTER_NAMES              \
 101 {                                               \
 102   {"d0",  FIRST_VFP_REGNUM + 0,  2},            \
 103   {"d1",  FIRST_VFP_REGNUM + 2,  2},            \
 104   {"d2",  FIRST_VFP_REGNUM + 4,  2},            \
 105   {"d3",  FIRST_VFP_REGNUM + 6,  2},            \
 106   {"d4",  FIRST_VFP_REGNUM + 8,  2},            \
 107   {"d5",  FIRST_VFP_REGNUM + 10, 2},            \
 108   {"d6",  FIRST_VFP_REGNUM + 12, 2},            \
 109   {"d7",  FIRST_VFP_REGNUM + 14, 2},            \
 110   {"d8",  FIRST_VFP_REGNUM + 16, 2},            \
 111   {"d9",  FIRST_VFP_REGNUM + 18, 2},            \
 112   {"d10", FIRST_VFP_REGNUM + 20, 2},            \
 113   {"d11", FIRST_VFP_REGNUM + 22, 2},            \
 114   {"d12", FIRST_VFP_REGNUM + 24, 2},            \
 115   {"d13", FIRST_VFP_REGNUM + 26, 2},            \
 116   {"d14", FIRST_VFP_REGNUM + 28, 2},            \
 117   {"d15", FIRST_VFP_REGNUM + 30, 2},            \
 118   {"q0",  FIRST_VFP_REGNUM + 0,  4},            \
 119   {"q1",  FIRST_VFP_REGNUM + 4,  4},            \
 120   {"q2",  FIRST_VFP_REGNUM + 8,  4},            \
 121   {"q3",  FIRST_VFP_REGNUM + 12, 4},            \
 122   {"q4",  FIRST_VFP_REGNUM + 16, 4},            \
 123   {"q5",  FIRST_VFP_REGNUM + 20, 4},            \
 124   {"q6",  FIRST_VFP_REGNUM + 24, 4},            \
 125   {"q7",  FIRST_VFP_REGNUM + 28, 4},            \
 126   {"q8",  FIRST_VFP_REGNUM + 32, 4},            \
 127   {"q9",  FIRST_VFP_REGNUM + 36, 4},            \
 128   {"q10", FIRST_VFP_REGNUM + 40, 4},            \
 129   {"q11", FIRST_VFP_REGNUM + 44, 4},            \
 130   {"q12", FIRST_VFP_REGNUM + 48, 4},            \
 131   {"q13", FIRST_VFP_REGNUM + 52, 4},            \
 132   {"q14", FIRST_VFP_REGNUM + 56, 4},            \
 133   {"q15", FIRST_VFP_REGNUM + 60, 4}             \
 134 }
 135 #endif
 136
 137 #ifndef NO_DOLLAR_IN_LABEL
 138 #define NO_DOLLAR_IN_LABEL 1
 139 #endif
 140
 141 /* Generate DBX debugging information.  riscix.h will undefine this because
 142    the native assembler does not support stabs.  */
 143 #define DBX_DEBUGGING_INFO 1
 144
 145 /* Acorn dbx moans about continuation chars, so don't use any.  */
 146 #ifndef DBX_CONTIN_LENGTH
 147 #define DBX_CONTIN_LENGTH  0
 148 #endif
 149
 150 /* Output a function label definition.  */
 151 #ifndef ASM_DECLARE_FUNCTION_NAME
 152 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 153   do                                                    \
 154     {                                                   \
 155       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 156       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 157     }                                                   \
 158   while (0)
 159 #endif
 160
 161 /* Globalizing directive for a label.  */
 162 #define GLOBAL_ASM_OP "\t.global\t"
 163
 164 /* Make an internal label into a string.  */
 165 #ifndef ASM_GENERATE_INTERNAL_LABEL
 166 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 167   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 168 #endif
 169
 170 /* Output an element of a dispatch table.  */
 171 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)                  \
 172   do                                                            \
 173     {                                                           \
 174       gcc_assert (!TARGET_THUMB2);                              \
 175       asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE);          \
 176     }                                                           \
 177   while (0)
 178
 179
 180 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions
 181    can be used.  For non-pic code where the offsets do not suitable for
 182    TBB/TBH the elements are output as absolute labels.  */
 183 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)              \
 184   do                                                                    \
 185     {                                                                   \
 186       if (TARGET_ARM)                                                   \
 187         asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE);                    \
 188       else if (TARGET_THUMB1)                                           \
 189         {                                                               \
 190           if (flag_pic || optimize_size)                                \
 191             {                                                           \
 192               switch (GET_MODE(body))                                   \
 193                 {                                                       \
 194                 case QImode:                                            \
 195                   asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",    \
 196                                VALUE, REL);                             \
 197                   break;                                                \
 198                 case HImode: /* TBH */                                  \
 199                   asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",   \
 200                                VALUE, REL);                             \
 201                   break;                                                \
 202                 case SImode:                                            \
 203                   asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n",        \
 204                                VALUE, REL);                             \
 205                   break;                                                \
 206                 default:                                                \
 207                   gcc_unreachable();                                    \
 208                 }                                                       \
 209             }                                                           \
 210           else                                                          \
 211             asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);          \
 212         }                                                               \
 213       else /* Thumb-2 */                                                \
 214         {                                                               \
 215           switch (GET_MODE(body))                                       \
 216             {                                                           \
 217             case QImode: /* TBB */                                      \
 218               asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",        \
 219                            VALUE, REL);                                 \
 220               break;                                                    \
 221             case HImode: /* TBH */                                      \
 222               asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",       \
 223                            VALUE, REL);                                 \
 224               break;                                                    \
 225             case SImode:                                                \
 226               if (flag_pic)                                             \
 227                 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \
 228               else                                                      \
 229                 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);      \
 230               break;                                                    \
 231             default:                                                    \
 232               gcc_unreachable();                                        \
 233             }                                                           \
 234         }                                                               \
 235     }                                                                   \
 236   while (0)
 237
 238
 239 #undef  ASM_OUTPUT_ASCII
 240 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 241   output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN)
 242
 243 /* Output a gap.  In fact we fill it with nulls.  */
 244 #undef  ASM_OUTPUT_SKIP
 245 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 246   fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES))
 247
 248 /* Align output to a power of two.  Horrible /bin/as.  */
 249 #ifndef ASM_OUTPUT_ALIGN
 250 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 251   do                                                    \
 252     {                                                   \
 253       register int amount = 1 << (POWER);               \
 254                                                         \
 255       if (amount == 2)                                  \
 256         fprintf (STREAM, "\t.even\n");                  \
 257       else if (amount != 1)                             \
 258         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 259     }                                                   \
 260   while (0)
 261 #endif
 262
 263 /* Output a common block.  */
 264 #ifndef ASM_OUTPUT_COMMON
 265 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 266   do                                                    \
 267     {                                                   \
 268       fprintf (STREAM, "\t.comm\t");                    \
 269       assemble_name (STREAM, NAME);                     \
 270       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 271                    (int)(ROUNDED), (int)(SIZE));        \
 272     }                                                   \
 273   while (0)
 274 #endif
 275
 276 /* Output a local common block.  /bin/as can't do this, so hack a
 277    `.space' into the bss segment.  Note that this is *bad* practice,
 278    which is guaranteed NOT to work since it doesn't define STATIC
 279    COMMON space but merely STATIC BSS space.  */
 280 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 281 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 282   do                                                                    \
 283     {                                                                   \
 284       switch_to_section (bss_section);                                  \
 285       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 286       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 287       fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE));                  \
 288     }                                                                   \
 289   while (0)
 290 #endif
 291
 292 /* Output a zero-initialized block.  */
 293 #ifndef ASM_OUTPUT_ALIGNED_BSS
 294 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 295   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 296 #endif
 297
 298 #ifndef ASM_COMMENT_START
 299 #define ASM_COMMENT_START       "@"
 300 #endif
 301
 302 /* This works for GAS and some other assemblers.  */
 303 #define SET_ASM_OP              "\t.set\t"