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 2, 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 COPYING.  If not, write to
  20    the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 #ifndef ASM_APP_ON
  24 #define ASM_APP_ON              ""
  25 #endif
  26 #ifndef ASM_APP_OFF
  27 #define ASM_APP_OFF             ""
  28 #endif
  29
  30 /* Switch to the text or data segment.  */
  31 #define TEXT_SECTION_ASM_OP     "\t.text"
  32 #define DATA_SECTION_ASM_OP     "\t.data"
  33 #define BSS_SECTION_ASM_OP      "\t.bss"
  34
  35 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
  36    make sure that this change is reflected in the function
  37    coff_arm_is_local_label_name() in bfd/coff-arm.c.  */
  38 #ifndef REGISTER_PREFIX
  39 #define REGISTER_PREFIX         ""
  40 #endif
  41
  42 #ifndef USER_LABEL_PREFIX
  43 #define USER_LABEL_PREFIX       "_"
  44 #endif
  45
  46 #ifndef LOCAL_LABEL_PREFIX
  47 #define LOCAL_LABEL_PREFIX      ""
  48 #endif
  49
  50 /* The assembler's names for the registers.  Note that the ?xx registers are
  51    there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15
  52    (each of which is overlaid on two S registers), although there are no
  53    actual single-precision registers which correspond to D16-D31.  */
  54 #ifndef REGISTER_NAMES
  55 #define REGISTER_NAMES                             \
  56 {                                                  \
  57   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",  \
  58   "r8", "r9", "sl", "fp", "ip", "sp", "lr", "pc",  \
  59   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",  \
  60   "cc", "sfp", "afp",                              \
  61   "mv0",   "mv1",   "mv2",   "mv3",                \
  62   "mv4",   "mv5",   "mv6",   "mv7",                \
  63   "mv8",   "mv9",   "mv10",  "mv11",               \
  64   "mv12",  "mv13",  "mv14",  "mv15",               \
  65   "wcgr0", "wcgr1", "wcgr2", "wcgr3",              \
  66   "wr0",   "wr1",   "wr2",   "wr3",                \
  67   "wr4",   "wr5",   "wr6",   "wr7",                \
  68   "wr8",   "wr9",   "wr10",  "wr11",               \
  69   "wr12",  "wr13",  "wr14",  "wr15",               \
  70   "s0",  "s1",  "s2",  "s3",  "s4",  "s5",  "s6",  "s7",  \
  71   "s8",  "s9",  "s10", "s11", "s12", "s13", "s14", "s15", \
  72   "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23", \
  73   "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31", \
  74   "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19", \
  75   "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23", \
  76   "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27", \
  77   "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31", \
  78   "vfpcc"                                          \
  79 }
  80 #endif
  81
  82 #ifndef ADDITIONAL_REGISTER_NAMES
  83 #define ADDITIONAL_REGISTER_NAMES               \
  84 {                                               \
  85   {"a1", 0},                                    \
  86   {"a2", 1},                                    \
  87   {"a3", 2},                                    \
  88   {"a4", 3},                                    \
  89   {"v1", 4},                                    \
  90   {"v2", 5},                                    \
  91   {"v3", 6},                                    \
  92   {"v4", 7},                                    \
  93   {"v5", 8},                                    \
  94   {"v6", 9},                                    \
  95   {"rfp", 9}, /* Gcc used to call it this */    \
  96   {"sb", 9},                                    \
  97   {"v7", 10},                                   \
  98   {"r10", 10},  /* sl */                        \
  99   {"r11", 11},  /* fp */                        \
 100   {"r12", 12},  /* ip */                        \
 101   {"r13", 13},  /* sp */                        \
 102   {"r14", 14},  /* lr */                        \
 103   {"r15", 15},  /* pc */                        \
 104   {"mvf0", 27},                                 \
 105   {"mvf1", 28},                                 \
 106   {"mvf2", 29},                                 \
 107   {"mvf3", 30},                                 \
 108   {"mvf4", 31},                                 \
 109   {"mvf5", 32},                                 \
 110   {"mvf6", 33},                                 \
 111   {"mvf7", 34},                                 \
 112   {"mvf8", 35},                                 \
 113   {"mvf9", 36},                                 \
 114   {"mvf10", 37},                                \
 115   {"mvf11", 38},                                \
 116   {"mvf12", 39},                                \
 117   {"mvf13", 40},                                \
 118   {"mvf14", 41},                                \
 119   {"mvf15", 42},                                \
 120   {"mvd0", 27},                                 \
 121   {"mvd1", 28},                                 \
 122   {"mvd2", 29},                                 \
 123   {"mvd3", 30},                                 \
 124   {"mvd4", 31},                                 \
 125   {"mvd5", 32},                                 \
 126   {"mvd6", 33},                                 \
 127   {"mvd7", 34},                                 \
 128   {"mvd8", 35},                                 \
 129   {"mvd9", 36},                                 \
 130   {"mvd10", 37},                                \
 131   {"mvd11", 38},                                \
 132   {"mvd12", 39},                                \
 133   {"mvd13", 40},                                \
 134   {"mvd14", 41},                                \
 135   {"mvd15", 42},                                \
 136   {"mvfx0", 27},                                \
 137   {"mvfx1", 28},                                \
 138   {"mvfx2", 29},                                \
 139   {"mvfx3", 30},                                \
 140   {"mvfx4", 31},                                \
 141   {"mvfx5", 32},                                \
 142   {"mvfx6", 33},                                \
 143   {"mvfx7", 34},                                \
 144   {"mvfx8", 35},                                \
 145   {"mvfx9", 36},                                \
 146   {"mvfx10", 37},                               \
 147   {"mvfx11", 38},                               \
 148   {"mvfx12", 39},                               \
 149   {"mvfx13", 40},                               \
 150   {"mvfx14", 41},                               \
 151   {"mvfx15", 42},                               \
 152   {"mvdx0", 27},                                \
 153   {"mvdx1", 28},                                \
 154   {"mvdx2", 29},                                \
 155   {"mvdx3", 30},                                \
 156   {"mvdx4", 31},                                \
 157   {"mvdx5", 32},                                \
 158   {"mvdx6", 33},                                \
 159   {"mvdx7", 34},                                \
 160   {"mvdx8", 35},                                \
 161   {"mvdx9", 36},                                \
 162   {"mvdx10", 37},                               \
 163   {"mvdx11", 38},                               \
 164   {"mvdx12", 39},                               \
 165   {"mvdx13", 40},                               \
 166   {"mvdx14", 41},                               \
 167   {"mvdx15", 42},                               \
 168   {"d0", 63},                                   \
 169   {"d1", 65},                                   \
 170   {"d2", 67},                                   \
 171   {"d3", 69},                                   \
 172   {"d4", 71},                                   \
 173   {"d5", 73},                                   \
 174   {"d6", 75},                                   \
 175   {"d7", 77},                                   \
 176   {"d8", 79},                                   \
 177   {"d9", 81},                                   \
 178   {"d10", 83},                                  \
 179   {"d11", 85},                                  \
 180   {"d12", 87},                                  \
 181   {"d13", 89},                                  \
 182   {"d14", 91},                                  \
 183   {"d15", 93},                                  \
 184 }
 185 #endif
 186
 187 /* Arm Assembler barfs on dollars.  */
 188 #define DOLLARS_IN_IDENTIFIERS 0
 189
 190 #ifndef NO_DOLLAR_IN_LABEL
 191 #define NO_DOLLAR_IN_LABEL 1
 192 #endif
 193
 194 /* Generate DBX debugging information.  riscix.h will undefine this because
 195    the native assembler does not support stabs.  */
 196 #define DBX_DEBUGGING_INFO 1
 197
 198 /* Acorn dbx moans about continuation chars, so don't use any.  */
 199 #ifndef DBX_CONTIN_LENGTH
 200 #define DBX_CONTIN_LENGTH  0
 201 #endif
 202
 203 /* Output a function label definition.  */
 204 #ifndef ASM_DECLARE_FUNCTION_NAME
 205 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 206   do                                                    \
 207     {                                                   \
 208       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 209       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 210     }                                                   \
 211   while (0)
 212 #endif
 213
 214 /* Globalizing directive for a label.  */
 215 #define GLOBAL_ASM_OP "\t.global\t"
 216
 217 /* Make an internal label into a string.  */
 218 #ifndef ASM_GENERATE_INTERNAL_LABEL
 219 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 220   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 221 #endif
 222
 223 /* Output an element of a dispatch table.  */
 224 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)                  \
 225   do                                                            \
 226     {                                                           \
 227       gcc_assert (!TARGET_THUMB2);                              \
 228       asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE);          \
 229     }                                                           \
 230   while (0)
 231
 232
 233 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions
 234    can be used.  For non-pic code where the offsets do not suitable for
 235    TBB/TBH the elements are output as absolute labels.  */
 236 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)              \
 237   do                                                                    \
 238     {                                                                   \
 239       if (TARGET_ARM)                                                   \
 240         asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE);                    \
 241       else if (TARGET_THUMB1)                                           \
 242         asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n", VALUE, REL);     \
 243       else /* Thumb-2 */                                                \
 244         {                                                               \
 245           switch (GET_MODE(body))                                       \
 246             {                                                           \
 247             case QImode: /* TBB */                                      \
 248               asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",        \
 249                            VALUE, REL);                                 \
 250               break;                                                    \
 251             case HImode: /* TBH */                                      \
 252               asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",       \
 253                            VALUE, REL);                                 \
 254               break;                                                    \
 255             case SImode:                                                \
 256               if (flag_pic)                                             \
 257                 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \
 258               else                                                      \
 259                 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);      \
 260               break;                                                    \
 261             default:                                                    \
 262               gcc_unreachable();                                        \
 263             }                                                           \
 264         }                                                               \
 265     }                                                                   \
 266   while (0)
 267
 268
 269 #undef  ASM_OUTPUT_ASCII
 270 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 271   output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN)
 272
 273 /* Output a gap.  In fact we fill it with nulls.  */
 274 #undef  ASM_OUTPUT_SKIP
 275 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 276   fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES))
 277
 278 /* Align output to a power of two.  Horrible /bin/as.  */
 279 #ifndef ASM_OUTPUT_ALIGN
 280 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 281   do                                                    \
 282     {                                                   \
 283       register int amount = 1 << (POWER);               \
 284                                                         \
 285       if (amount == 2)                                  \
 286         fprintf (STREAM, "\t.even\n");                  \
 287       else if (amount != 1)                             \
 288         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 289     }                                                   \
 290   while (0)
 291 #endif
 292
 293 /* Output a common block.  */
 294 #ifndef ASM_OUTPUT_COMMON
 295 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 296   do                                                    \
 297     {                                                   \
 298       fprintf (STREAM, "\t.comm\t");                    \
 299       assemble_name (STREAM, NAME);                     \
 300       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 301                    (int)(ROUNDED), (int)(SIZE));        \
 302     }                                                   \
 303   while (0)
 304 #endif
 305
 306 /* Output a local common block.  /bin/as can't do this, so hack a
 307    `.space' into the bss segment.  Note that this is *bad* practice,
 308    which is guaranteed NOT to work since it doesn't define STATIC
 309    COMMON space but merely STATIC BSS space.  */
 310 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 311 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 312   do                                                                    \
 313     {                                                                   \
 314       switch_to_section (bss_section);                                  \
 315       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 316       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 317       fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE));                  \
 318     }                                                                   \
 319   while (0)
 320 #endif
 321
 322 /* Output a zero-initialized block.  */
 323 #ifndef ASM_OUTPUT_ALIGNED_BSS
 324 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 325   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 326 #endif
 327
 328 /* Output a #ident directive.  */
 329 #ifndef ASM_OUTPUT_IDENT
 330 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 331   asm_fprintf (STREAM, "%@ - - - ident %s\n", STRING)
 332 #endif
 333
 334 #ifndef ASM_COMMENT_START
 335 #define ASM_COMMENT_START       "@"
 336 #endif
 337
 338 /* This works for GAS and some other assemblers.  */
 339 #define SET_ASM_OP              "\t.set\t"