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 #define NO_DOLLAR_IN_LABEL 1
 109
 110 /* DBX register number for a given compiler register number */
 111 #define DBX_REGISTER_NUMBER(REGNO)  (REGNO)
 112
 113 /* Generate DBX debugging information.  riscix.h will undefine this because
 114    the native assembler does not support stabs. */
 115 #ifndef DBX_DEBUGGING_INFO
 116 #define DBX_DEBUGGING_INFO  1
 117 #endif
 118
 119 /* Acorn dbx moans about continuation chars, so don't use any.  */
 120 #ifndef DBX_CONTIN_LENGTH
 121 #define DBX_CONTIN_LENGTH  0
 122 #endif
 123
 124 /* Output a source filename for the debugger. RISCiX dbx insists that the
 125    ``desc'' field is set to compiler version number >= 315 (sic).  */
 126 #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME)                   \
 127   do                                                                    \
 128     {                                                                   \
 129       fprintf (STREAM, ".stabs ");                                      \
 130       output_quoted_string (STREAM, NAME);                              \
 131       fprintf (STREAM, ",%d,0,315,%s\n", N_SO, &ltext_label_name[1]);   \
 132       text_section ();                                                  \
 133       ASM_OUTPUT_INTERNAL_LABEL (STREAM, "Ltext", 0);                   \
 134     }                                                                   \
 135   while (0)
 136
 137 /* Output a function label definition.  */
 138 #ifndef ASM_DECLARE_FUNCTION_NAME
 139 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 140   do                                                    \
 141     {                                                   \
 142       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 143       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 144     }                                                   \
 145   while (0)
 146 #endif
 147
 148 #ifndef ASM_OUTPUT_LABEL
 149 #define ASM_OUTPUT_LABEL(STREAM, NAME)          \
 150   do                                            \
 151     {                                           \
 152       assemble_name (STREAM,NAME);              \
 153       fputs (":\n", STREAM);                    \
 154     }                                           \
 155   while (0)
 156 #endif
 157
 158 /* Output a globalising directive for a label.  */
 159 #ifndef ASM_GLOBALIZE_LABEL
 160 #define ASM_GLOBALIZE_LABEL(STREAM, NAME)       \
 161   do                                            \
 162     {                                           \
 163       fprintf (STREAM, "\t.global\t");          \
 164       assemble_name (STREAM, NAME);             \
 165       fputc ('\n',STREAM);                      \
 166     }                                           \
 167   while (0)
 168 #endif
 169
 170 /* Make an internal label into a string.  */
 171 #ifndef ASM_GENERATE_INTERNAL_LABEL
 172 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 173   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 174 #endif
 175
 176 /* Construct a private name.  */
 177 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER)  \
 178   ((OUTVAR) = (char *) alloca (strlen (NAME) + 10),  \
 179    sprintf (OUTVAR, "%s.%d", NAME, NUMBER))
 180
 181 /* Output an element of a dispatch table.  */
 182 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)  \
 183   asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE)
 184
 185 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)  \
 186   asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE)
 187
 188 /* Output various types of constants.  For real numbers we output hex, with
 189    a comment containing the "human" value, this allows us to pass NaN's which
 190    the riscix assembler doesn't understand (it also makes cross-assembling
 191    less likely to fail). */
 192
 193 #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE)                           \
 194   do                                                                    \
 195     {                                                                   \
 196       char dstr[30];                                                    \
 197       long l[3];                                                        \
 198       REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l);                      \
 199       REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);                     \
 200       asm_fprintf (STREAM,                                              \
 201                    "\t.long 0x%lx,0x%lx,0x%lx\t%@ long double %s\n",    \
 202                    l[0], l[1], l[2], dstr);                             \
 203     }                                                                   \
 204   while (0)
 205
 206 #define ASM_OUTPUT_DOUBLE(STREAM, VALUE)                                \
 207   do                                                                    \
 208     {                                                                   \
 209       char dstr[30];                                                    \
 210       long l[2];                                                        \
 211       REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l);                           \
 212       REAL_VALUE_TO_DECIMAL (VALUE, "%.14g", dstr);                     \
 213       asm_fprintf (STREAM, "\t.long 0x%lx, 0x%lx\t%@ double %s\n", l[0],\
 214                    l[1], dstr);                                         \
 215     }                                                                   \
 216   while (0)
 217
 218 #define ASM_OUTPUT_FLOAT(STREAM, VALUE)                         \
 219   do                                                            \
 220     {                                                           \
 221       char dstr[30];                                            \
 222       long l;                                                   \
 223       REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);                   \
 224       REAL_VALUE_TO_DECIMAL (VALUE, "%.7g", dstr);              \
 225       asm_fprintf (STREAM, "\t.word 0x%lx\t%@ float %s\n", l,   \
 226                    dstr);                                       \
 227     }                                                           \
 228   while (0)
 229
 230 #define ASM_OUTPUT_INT(STREAM, EXP)             \
 231   do                                            \
 232     {                                           \
 233       fprintf (STREAM, "\t.word\t");            \
 234       OUTPUT_INT_ADDR_CONST (STREAM, EXP);      \
 235       fputc ('\n', STREAM);                     \
 236     }                                           \
 237   while (0)
 238
 239 #define ASM_OUTPUT_SHORT(STREAM, EXP)           \
 240   do                                            \
 241     {                                           \
 242       fprintf (STREAM, "\t.short\t");           \
 243       output_addr_const (STREAM, EXP);          \
 244       fputc ('\n', STREAM);                     \
 245     }                                           \
 246   while (0)
 247
 248 #define ASM_OUTPUT_CHAR(STREAM, EXP)            \
 249   do                                            \
 250     {                                           \
 251       fprintf (STREAM, "\t.byte\t");            \
 252       output_addr_const (STREAM, EXP);          \
 253       fputc ('\n', STREAM);                     \
 254     }                                           \
 255   while (0)
 256
 257 #define ASM_OUTPUT_BYTE(STREAM, VALUE)          \
 258   fprintf (STREAM, "\t.byte\t%d\n", VALUE)
 259
 260 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 261   output_ascii_pseudo_op (STREAM, (const unsigned char *)(PTR), LEN)
 262
 263 /* Output a gap.  In fact we fill it with nulls.  */
 264 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 265   fprintf (STREAM, "\t.space\t%d\n", NBYTES)
 266
 267 /* Align output to a power of two.  Horrible /bin/as.  */
 268 #ifndef ASM_OUTPUT_ALIGN
 269 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 270   do                                                    \
 271     {                                                   \
 272       register int amount = 1 << (POWER);               \
 273                                                         \
 274       if (amount == 2)                                  \
 275         fprintf (STREAM, "\t.even\n");                  \
 276       else if (amount != 1)                             \
 277         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 278     }                                                   \
 279   while (0)
 280 #endif
 281
 282 /* Output a common block */
 283 #ifndef ASM_OUTPUT_COMMON
 284 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 285   do                                                    \
 286     {                                                   \
 287       fprintf (STREAM, "\t.comm\t");                    \
 288       assemble_name (STREAM, NAME);                     \
 289       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 290                    ROUNDED, SIZE);                      \
 291     }                                                   \
 292   while (0)
 293 #endif
 294
 295 /* Output a local common block.  /bin/as can't do this, so hack a
 296    `.space' into the bss segment.  Note that this is *bad* practice,
 297    which is guaranteed NOT to work since it doesn't define STATIC
 298    COMMON space but merely STATIC BSS space.  */
 299 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 300 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 301   do                                                                    \
 302     {                                                                   \
 303       bss_section ();                                                   \
 304       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 305       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 306       fprintf (STREAM, "\t.space\t%d\n", SIZE);                         \
 307     }                                                                   \
 308   while (0)
 309 #endif
 310
 311 /* Output a zero-initialized block.  */
 312 #ifndef ASM_OUTPUT_ALIGNED_BSS
 313 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 314   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 315 #endif
 316
 317 /* Output a source line for the debugger.  */
 318 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM,LINE) */
 319
 320 /* Output a #ident directive.  */
 321 #ifndef ASM_OUTPUT_IDENT
 322 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 323   asm_fprintf (STREAM, "%@ - - - ident %s\n", STRING)
 324 #endif
 325
 326 /* The assembler's parentheses characters.  */
 327 #define ASM_OPEN_PAREN          "("
 328 #define ASM_CLOSE_PAREN         ")"
 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"
 336
 337 #include "arm.h"