gcc/config/arm/aout.h

   1 /* Definitions of target machine for GNU compiler, for ARM with a.out
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2004, 2007
   3    Free Software Foundation, Inc.
   4    Contributed by Richard Earnshaw (rearnsha@armltd.co.uk).
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING3.  If not see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef ASM_APP_ON
  23 #define ASM_APP_ON              ""
  24 #endif
  25 #ifndef ASM_APP_OFF
  26 #define ASM_APP_OFF             ""
  27 #endif
  28
  29 /* Switch to the text or data segment.  */
  30 #define TEXT_SECTION_ASM_OP     "\t.text"
  31 #define DATA_SECTION_ASM_OP     "\t.data"
  32 #define BSS_SECTION_ASM_OP      "\t.bss"
  33
  34 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
  35    make sure that this change is reflected in the function
  36    coff_arm_is_local_label_name() in bfd/coff-arm.c.  */
  37 #ifndef REGISTER_PREFIX
  38 #define REGISTER_PREFIX         ""
  39 #endif
  40
  41 #ifndef USER_LABEL_PREFIX
  42 #define USER_LABEL_PREFIX       "_"
  43 #endif
  44
  45 #ifndef LOCAL_LABEL_PREFIX
  46 #define LOCAL_LABEL_PREFIX      ""
  47 #endif
  48
  49 /* The assembler's names for the registers.  Note that the ?xx registers are
  50    there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15
  51    (each of which is overlaid on two S registers), although there are no
  52    actual single-precision registers which correspond to D16-D31.  */
  53 #ifndef REGISTER_NAMES
  54 #define REGISTER_NAMES                             \
  55 {                                                  \
  56   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",  \
  57   "r8", "r9", "sl", "fp", "ip", "sp", "lr", "pc",  \
  58   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",  \
  59   "cc", "sfp", "afp",                              \
  60   "mv0",   "mv1",   "mv2",   "mv3",                \
  61   "mv4",   "mv5",   "mv6",   "mv7",                \
  62   "mv8",   "mv9",   "mv10",  "mv11",               \
  63   "mv12",  "mv13",  "mv14",  "mv15",               \
  64   "wcgr0", "wcgr1", "wcgr2", "wcgr3",              \
  65   "wr0",   "wr1",   "wr2",   "wr3",                \
  66   "wr4",   "wr5",   "wr6",   "wr7",                \
  67   "wr8",   "wr9",   "wr10",  "wr11",               \
  68   "wr12",  "wr13",  "wr14",  "wr15",               \
  69   "s0",  "s1",  "s2",  "s3",  "s4",  "s5",  "s6",  "s7",  \
  70   "s8",  "s9",  "s10", "s11", "s12", "s13", "s14", "s15", \
  71   "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23", \
  72   "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31", \
  73   "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19", \
  74   "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23", \
  75   "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27", \
  76   "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31", \
  77   "vfpcc"                                          \
  78 }
  79 #endif
  80
  81 #ifndef ADDITIONAL_REGISTER_NAMES
  82 #define ADDITIONAL_REGISTER_NAMES               \
  83 {                                               \
  84   {"a1", 0},                                    \
  85   {"a2", 1},                                    \
  86   {"a3", 2},                                    \
  87   {"a4", 3},                                    \
  88   {"v1", 4},                                    \
  89   {"v2", 5},                                    \
  90   {"v3", 6},                                    \
  91   {"v4", 7},                                    \
  92   {"v5", 8},                                    \
  93   {"v6", 9},                                    \
  94   {"rfp", 9}, /* Gcc used to call it this */    \
  95   {"sb", 9},                                    \
  96   {"v7", 10},                                   \
  97   {"r10", 10},  /* sl */                        \
  98   {"r11", 11},  /* fp */                        \
  99   {"r12", 12},  /* ip */                        \
 100   {"r13", 13},  /* sp */                        \
 101   {"r14", 14},  /* lr */                        \
 102   {"r15", 15},  /* pc */                        \
 103   {"mvf0", 27},                                 \
 104   {"mvf1", 28},                                 \
 105   {"mvf2", 29},                                 \
 106   {"mvf3", 30},                                 \
 107   {"mvf4", 31},                                 \
 108   {"mvf5", 32},                                 \
 109   {"mvf6", 33},                                 \
 110   {"mvf7", 34},                                 \
 111   {"mvf8", 35},                                 \
 112   {"mvf9", 36},                                 \
 113   {"mvf10", 37},                                \
 114   {"mvf11", 38},                                \
 115   {"mvf12", 39},                                \
 116   {"mvf13", 40},                                \
 117   {"mvf14", 41},                                \
 118   {"mvf15", 42},                                \
 119   {"mvd0", 27},                                 \
 120   {"mvd1", 28},                                 \
 121   {"mvd2", 29},                                 \
 122   {"mvd3", 30},                                 \
 123   {"mvd4", 31},                                 \
 124   {"mvd5", 32},                                 \
 125   {"mvd6", 33},                                 \
 126   {"mvd7", 34},                                 \
 127   {"mvd8", 35},                                 \
 128   {"mvd9", 36},                                 \
 129   {"mvd10", 37},                                \
 130   {"mvd11", 38},                                \
 131   {"mvd12", 39},                                \
 132   {"mvd13", 40},                                \
 133   {"mvd14", 41},                                \
 134   {"mvd15", 42},                                \
 135   {"mvfx0", 27},                                \
 136   {"mvfx1", 28},                                \
 137   {"mvfx2", 29},                                \
 138   {"mvfx3", 30},                                \
 139   {"mvfx4", 31},                                \
 140   {"mvfx5", 32},                                \
 141   {"mvfx6", 33},                                \
 142   {"mvfx7", 34},                                \
 143   {"mvfx8", 35},                                \
 144   {"mvfx9", 36},                                \
 145   {"mvfx10", 37},                               \
 146   {"mvfx11", 38},                               \
 147   {"mvfx12", 39},                               \
 148   {"mvfx13", 40},                               \
 149   {"mvfx14", 41},                               \
 150   {"mvfx15", 42},                               \
 151   {"mvdx0", 27},                                \
 152   {"mvdx1", 28},                                \
 153   {"mvdx2", 29},                                \
 154   {"mvdx3", 30},                                \
 155   {"mvdx4", 31},                                \
 156   {"mvdx5", 32},                                \
 157   {"mvdx6", 33},                                \
 158   {"mvdx7", 34},                                \
 159   {"mvdx8", 35},                                \
 160   {"mvdx9", 36},                                \
 161   {"mvdx10", 37},                               \
 162   {"mvdx11", 38},                               \
 163   {"mvdx12", 39},                               \
 164   {"mvdx13", 40},                               \
 165   {"mvdx14", 41},                               \
 166   {"mvdx15", 42},                               \
 167   {"d0", 63}, {"q0", 63},                       \
 168   {"d1", 65},                                   \
 169   {"d2", 67}, {"q1", 67},                       \
 170   {"d3", 69},                                   \
 171   {"d4", 71}, {"q2", 71},                       \
 172   {"d5", 73},                                   \
 173   {"d6", 75}, {"q3", 75},                       \
 174   {"d7", 77},                                   \
 175   {"d8", 79}, {"q4", 79},                       \
 176   {"d9", 81},                                   \
 177   {"d10", 83}, {"q5", 83},                      \
 178   {"d11", 85},                                  \
 179   {"d12", 87}, {"q6", 87},                      \
 180   {"d13", 89},                                  \
 181   {"d14", 91}, {"q7", 91},                      \
 182   {"d15", 93},                                  \
 183   {"q8", 95},                                   \
 184   {"q9", 99},                                   \
 185   {"q10", 103},                                 \
 186   {"q11", 107},                                 \
 187   {"q12", 111},                                 \
 188   {"q13", 115},                                 \
 189   {"q14", 119},                                 \
 190   {"q15", 123}                                  \
 191 }
 192 #endif
 193
 194 /* Arm Assembler barfs on dollars.  */
 195 #define DOLLARS_IN_IDENTIFIERS 0
 196
 197 #ifndef NO_DOLLAR_IN_LABEL
 198 #define NO_DOLLAR_IN_LABEL 1
 199 #endif
 200
 201 /* Generate DBX debugging information.  riscix.h will undefine this because
 202    the native assembler does not support stabs.  */
 203 #define DBX_DEBUGGING_INFO 1
 204
 205 /* Acorn dbx moans about continuation chars, so don't use any.  */
 206 #ifndef DBX_CONTIN_LENGTH
 207 #define DBX_CONTIN_LENGTH  0
 208 #endif
 209
 210 /* Output a function label definition.  */
 211 #ifndef ASM_DECLARE_FUNCTION_NAME
 212 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 213   do                                                    \
 214     {                                                   \
 215       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 216       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 217     }                                                   \
 218   while (0)
 219 #endif
 220
 221 /* Globalizing directive for a label.  */
 222 #define GLOBAL_ASM_OP "\t.global\t"
 223
 224 /* Make an internal label into a string.  */
 225 #ifndef ASM_GENERATE_INTERNAL_LABEL
 226 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 227   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 228 #endif
 229
 230 /* Output an element of a dispatch table.  */
 231 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)                  \
 232   do                                                            \
 233     {                                                           \
 234       gcc_assert (!TARGET_THUMB2);                              \
 235       asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE);          \
 236     }                                                           \
 237   while (0)
 238
 239
 240 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions
 241    can be used.  For non-pic code where the offsets do not suitable for
 242    TBB/TBH the elements are output as absolute labels.  */
 243 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)              \
 244   do                                                                    \
 245     {                                                                   \
 246       if (TARGET_ARM)                                                   \
 247         asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE);                    \
 248       else if (TARGET_THUMB1)                                           \
 249         asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n", VALUE, REL);     \
 250       else /* Thumb-2 */                                                \
 251         {                                                               \
 252           switch (GET_MODE(body))                                       \
 253             {                                                           \
 254             case QImode: /* TBB */                                      \
 255               asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",        \
 256                            VALUE, REL);                                 \
 257               break;                                                    \
 258             case HImode: /* TBH */                                      \
 259               asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",       \
 260                            VALUE, REL);                                 \
 261               break;                                                    \
 262             case SImode:                                                \
 263               if (flag_pic)                                             \
 264                 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \
 265               else                                                      \
 266                 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);      \
 267               break;                                                    \
 268             default:                                                    \
 269               gcc_unreachable();                                        \
 270             }                                                           \
 271         }                                                               \
 272     }                                                                   \
 273   while (0)
 274
 275
 276 #undef  ASM_OUTPUT_ASCII
 277 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 278   output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN)
 279
 280 /* Output a gap.  In fact we fill it with nulls.  */
 281 #undef  ASM_OUTPUT_SKIP
 282 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 283   fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES))
 284
 285 /* Align output to a power of two.  Horrible /bin/as.  */
 286 #ifndef ASM_OUTPUT_ALIGN
 287 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 288   do                                                    \
 289     {                                                   \
 290       register int amount = 1 << (POWER);               \
 291                                                         \
 292       if (amount == 2)                                  \
 293         fprintf (STREAM, "\t.even\n");                  \
 294       else if (amount != 1)                             \
 295         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 296     }                                                   \
 297   while (0)
 298 #endif
 299
 300 /* Output a common block.  */
 301 #ifndef ASM_OUTPUT_COMMON
 302 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 303   do                                                    \
 304     {                                                   \
 305       fprintf (STREAM, "\t.comm\t");                    \
 306       assemble_name (STREAM, NAME);                     \
 307       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 308                    (int)(ROUNDED), (int)(SIZE));        \
 309     }                                                   \
 310   while (0)
 311 #endif
 312
 313 /* Output a local common block.  /bin/as can't do this, so hack a
 314    `.space' into the bss segment.  Note that this is *bad* practice,
 315    which is guaranteed NOT to work since it doesn't define STATIC
 316    COMMON space but merely STATIC BSS space.  */
 317 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 318 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 319   do                                                                    \
 320     {                                                                   \
 321       switch_to_section (bss_section);                                  \
 322       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 323       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 324       fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE));                  \
 325     }                                                                   \
 326   while (0)
 327 #endif
 328
 329 /* Output a zero-initialized block.  */
 330 #ifndef ASM_OUTPUT_ALIGNED_BSS
 331 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 332   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 333 #endif
 334
 335 /* Output a #ident directive.  */
 336 #ifndef ASM_OUTPUT_IDENT
 337 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 338   asm_fprintf (STREAM, "%@ - - - ident %s\n", STRING)
 339 #endif
 340
 341 #ifndef ASM_COMMENT_START
 342 #define ASM_COMMENT_START       "@"
 343 #endif
 344
 345 /* This works for GAS and some other assemblers.  */
 346 #define SET_ASM_OP              "\t.set\t"