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