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
   3    Free Software Foundation, Inc.
   4    Contributed by Richard Earnshaw (rearnsha@armltd.co.uk).
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef ARM_OS_NAME
  24 #define ARM_OS_NAME "(generic)"
  25 #endif
  26
  27 /* The text to go at the start of the assembler file */
  28 #ifndef ASM_FILE_START
  29 #define ASM_FILE_START(STREAM)              \
  30 {                                           \
  31   asm_fprintf (STREAM,"%Rrfp\t.req\t%Rr9\n"); \
  32   asm_fprintf (STREAM,"%Rsl\t.req\t%Rr10\n"); \
  33   asm_fprintf (STREAM,"%Rfp\t.req\t%Rr11\n"); \
  34   asm_fprintf (STREAM,"%Rip\t.req\t%Rr12\n"); \
  35   asm_fprintf (STREAM,"%Rsp\t.req\t%Rr13\n"); \
  36   asm_fprintf (STREAM,"%Rlr\t.req\t%Rr14\n"); \
  37   asm_fprintf (STREAM,"%Rpc\t.req\t%Rr15\n"); \
  38 }
  39 #endif
  40
  41 #ifndef ASM_APP_ON
  42 #define ASM_APP_ON              ""
  43 #endif
  44 #ifndef ASM_APP_OFF
  45 #define ASM_APP_OFF             ""
  46 #endif
  47
  48 /* Switch to the text or data segment.  */
  49 #define TEXT_SECTION_ASM_OP     "\t.text"
  50 #define DATA_SECTION_ASM_OP     "\t.data"
  51 #define BSS_SECTION_ASM_OP      "\t.bss"
  52
  53 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
  54    make sure that this change is reflected in the function
  55    coff_arm_is_local_label_name() in bfd/coff-arm.c  */
  56 #ifndef REGISTER_PREFIX
  57 #define REGISTER_PREFIX         ""
  58 #endif
  59
  60 #ifndef USER_LABEL_PREFIX
  61 #define USER_LABEL_PREFIX       "_"
  62 #endif
  63
  64 #ifndef LOCAL_LABEL_PREFIX
  65 #define LOCAL_LABEL_PREFIX      ""
  66 #endif
  67
  68
  69 /* The assembler's names for the registers.  */
  70 #ifndef REGISTER_NAMES
  71 #define REGISTER_NAMES                             \
  72 {                                                  \
  73   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",  \
  74   "r8", "r9", "sl", "fp", "ip", "sp", "lr", "pc",  \
  75   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",  \
  76   "cc", "sfp", "afp"                               \
  77 }
  78 #endif
  79
  80 #ifndef ADDITIONAL_REGISTER_NAMES
  81 #define ADDITIONAL_REGISTER_NAMES               \
  82 {                                               \
  83   {"a1", 0},                                    \
  84   {"a2", 1},                                    \
  85   {"a3", 2},                                    \
  86   {"a4", 3},                                    \
  87   {"v1", 4},                                    \
  88   {"v2", 5},                                    \
  89   {"v3", 6},                                    \
  90   {"v4", 7},                                    \
  91   {"v5", 8},                                    \
  92   {"v6", 9},                                    \
  93   {"rfp", 9}, /* Gcc used to call it this */    \
  94   {"sb", 9},                                    \
  95   {"v7", 10},                                   \
  96   {"r10", 10},  /* sl */                        \
  97   {"r11", 11},  /* fp */                        \
  98   {"r12", 12},  /* ip */                        \
  99   {"r13", 13},  /* sp */                        \
 100   {"r14", 14},  /* lr */                        \
 101   {"r15", 15}   /* pc */                        \
 102 }
 103 #endif
 104
 105 /* Arm Assembler barfs on dollars */
 106 #define DOLLARS_IN_IDENTIFIERS 0
 107
 108 #ifndef NO_DOLLAR_IN_LABEL
 109 #define NO_DOLLAR_IN_LABEL 1
 110 #endif
 111
 112 /* DBX register number for a given compiler register number */
 113 #define DBX_REGISTER_NUMBER(REGNO)  (REGNO)
 114
 115 /* Generate DBX debugging information.  riscix.h will undefine this because
 116    the native assembler does not support stabs. */
 117 #ifndef DBX_DEBUGGING_INFO
 118 #define DBX_DEBUGGING_INFO  1
 119 #endif
 120
 121 /* Acorn dbx moans about continuation chars, so don't use any.  */
 122 #ifndef DBX_CONTIN_LENGTH
 123 #define DBX_CONTIN_LENGTH  0
 124 #endif
 125
 126 /* Output a source filename for the debugger. RISCiX dbx insists that the
 127    ``desc'' field is set to compiler version number >= 315 (sic).  */
 128 #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME)                   \
 129   do                                                                    \
 130     {                                                                   \
 131       fprintf (STREAM, ".stabs ");                                      \
 132       output_quoted_string (STREAM, NAME);                              \
 133       fprintf (STREAM, ",%d,0,315,%s\n", N_SO, &ltext_label_name[1]);   \
 134       text_section ();                                                  \
 135       ASM_OUTPUT_INTERNAL_LABEL (STREAM, "Ltext", 0);                   \
 136     }                                                                   \
 137   while (0)
 138
 139 /* Output a function label definition.  */
 140 #ifndef ASM_DECLARE_FUNCTION_NAME
 141 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 142   do                                                    \
 143     {                                                   \
 144       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 145       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 146     }                                                   \
 147   while (0)
 148 #endif
 149
 150 #ifndef ASM_OUTPUT_LABEL
 151 #define ASM_OUTPUT_LABEL(STREAM, NAME)          \
 152   do                                            \
 153     {                                           \
 154       assemble_name (STREAM,NAME);              \
 155       fputs (":\n", STREAM);                    \
 156     }                                           \
 157   while (0)
 158 #endif
 159
 160 /* Output a globalising directive for a label.  */
 161 #ifndef ASM_GLOBALIZE_LABEL
 162 #define ASM_GLOBALIZE_LABEL(STREAM, NAME)       \
 163   do                                            \
 164     {                                           \
 165       fprintf (STREAM, "\t.global\t");          \
 166       assemble_name (STREAM, NAME);             \
 167       fputc ('\n',STREAM);                      \
 168     }                                           \
 169   while (0)
 170 #endif
 171
 172 /* Make an internal label into a string.  */
 173 #ifndef ASM_GENERATE_INTERNAL_LABEL
 174 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 175   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 176 #endif
 177
 178 /* Construct a private name.  */
 179 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER)  \
 180   ((OUTVAR) = (char *) alloca (strlen (NAME) + 10),  \
 181    sprintf (OUTVAR, "%s.%d", NAME, NUMBER))
 182
 183 /* Output an element of a dispatch table.  */
 184 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)  \
 185   asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE)
 186
 187 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)  \
 188   asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE)
 189
 190 /* Output various types of constants.  For real numbers we output hex, with
 191    a comment containing the "human" value, this allows us to pass NaN's which
 192    the riscix assembler doesn't understand (it also makes cross-assembling
 193    less likely to fail). */
 194
 195 #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE)                           \
 196   do                                                                    \
 197     {                                                                   \
 198       char dstr[30];                                                    \
 199       long l[3];                                                        \
 200       REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l);                      \
 201       REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);                     \
 202       asm_fprintf (STREAM,                                              \
 203                    "\t.long 0x%lx,0x%lx,0x%lx\t%@ long double %s\n",    \
 204                    l[0], l[1], l[2], dstr);                             \
 205     }                                                                   \
 206   while (0)
 207
 208 #define ASM_OUTPUT_DOUBLE(STREAM, VALUE)                                \
 209   do                                                                    \
 210     {                                                                   \
 211       char dstr[30];                                                    \
 212       long l[2];                                                        \
 213       REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l);                           \
 214       REAL_VALUE_TO_DECIMAL (VALUE, "%.14g", dstr);                     \
 215       asm_fprintf (STREAM, "\t.long 0x%lx, 0x%lx\t%@ double %s\n", l[0],\
 216                    l[1], dstr);                                         \
 217     }                                                                   \
 218   while (0)
 219
 220 #define ASM_OUTPUT_FLOAT(STREAM, VALUE)                         \
 221   do                                                            \
 222     {                                                           \
 223       char dstr[30];                                            \
 224       long l;                                                   \
 225       REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);                   \
 226       REAL_VALUE_TO_DECIMAL (VALUE, "%.7g", dstr);              \
 227       asm_fprintf (STREAM, "\t.word 0x%lx\t%@ float %s\n", l,   \
 228                    dstr);                                       \
 229     }                                                           \
 230   while (0)
 231
 232 #define ASM_OUTPUT_INT(STREAM, EXP)             \
 233   do                                            \
 234     {                                           \
 235       fprintf (STREAM, "\t.word\t");            \
 236       OUTPUT_INT_ADDR_CONST (STREAM, EXP);      \
 237       fputc ('\n', STREAM);                     \
 238     }                                           \
 239   while (0)
 240
 241 #define ASM_OUTPUT_SHORT(STREAM, EXP)           \
 242   do                                            \
 243     {                                           \
 244       fprintf (STREAM, "\t.short\t");           \
 245       output_addr_const (STREAM, EXP);          \
 246       fputc ('\n', STREAM);                     \
 247     }                                           \
 248   while (0)
 249
 250 #define ASM_OUTPUT_CHAR(STREAM, EXP)            \
 251   do                                            \
 252     {                                           \
 253       fprintf (STREAM, "\t.byte\t");            \
 254       output_addr_const (STREAM, EXP);          \
 255       fputc ('\n', STREAM);                     \
 256     }                                           \
 257   while (0)
 258
 259 #define ASM_OUTPUT_BYTE(STREAM, VALUE)          \
 260   fprintf (STREAM, "\t.byte\t%d\n", VALUE)
 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", 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                    ROUNDED, 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       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", 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 source line for the debugger.  */
 322 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM,LINE) */
 323
 324 /* Output a #ident directive.  */
 325 #ifndef ASM_OUTPUT_IDENT
 326 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 327   asm_fprintf (STREAM, "%@ - - - ident %s\n", STRING)
 328 #endif
 329
 330 #ifndef ASM_COMMENT_START
 331 #define ASM_COMMENT_START       "@"
 332 #endif
 333
 334 /* This works for GAS and some other assemblers.  */
 335 #define SET_ASM_OP              "\t.set\t"