gcc/config/arm/aout.h

   1 /* Definitions of target machine for GNU compiler, for ARM with a.out
   2    Copyright (C) 1995 - 2000 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rearnsha@armltd.co.uk).
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef ARM_OS_NAME
  23 #define ARM_OS_NAME "(generic)"
  24 #endif
  25
  26 /* The text to go at the start of the assembler file */
  27 #ifndef ASM_FILE_START
  28 #define ASM_FILE_START(STREAM)              \
  29 {                                           \
  30   asm_fprintf (STREAM,"%Rrfp\t.req\t%Rr9\n"); \
  31   asm_fprintf (STREAM,"%Rsl\t.req\t%Rr10\n"); \
  32   asm_fprintf (STREAM,"%Rfp\t.req\t%Rr11\n"); \
  33   asm_fprintf (STREAM,"%Rip\t.req\t%Rr12\n"); \
  34   asm_fprintf (STREAM,"%Rsp\t.req\t%Rr13\n"); \
  35   asm_fprintf (STREAM,"%Rlr\t.req\t%Rr14\n"); \
  36   asm_fprintf (STREAM,"%Rpc\t.req\t%Rr15\n"); \
  37 }
  38 #endif
  39
  40 #ifndef ASM_APP_ON
  41 #define ASM_APP_ON              ""
  42 #endif
  43 #ifndef ASM_APP_OFF
  44 #define ASM_APP_OFF             ""
  45 #endif
  46
  47 /* Switch to the text or data segment.  */
  48 #define TEXT_SECTION_ASM_OP     "\t.text"
  49 #define DATA_SECTION_ASM_OP     "\t.data"
  50 #define BSS_SECTION_ASM_OP      "\t.bss"
  51
  52 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
  53    make sure that this change is reflected in the function
  54    coff_arm_is_local_label_name() in bfd/coff-arm.c  */
  55 #ifndef REGISTER_PREFIX
  56 #define REGISTER_PREFIX         ""
  57 #endif
  58
  59 #ifndef USER_LABEL_PREFIX
  60 #define USER_LABEL_PREFIX       "_"
  61 #endif
  62
  63 #ifndef LOCAL_LABEL_PREFIX
  64 #define LOCAL_LABEL_PREFIX      ""
  65 #endif
  66
  67
  68 /* The assembler's names for the registers.  */
  69 #ifndef REGISTER_NAMES
  70 #define REGISTER_NAMES                             \
  71 {                                                  \
  72   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",  \
  73   "r8", "r9", "sl", "fp", "ip", "sp", "lr", "pc",  \
  74   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",  \
  75   "cc", "sfp", "afp"                               \
  76 }
  77 #endif
  78
  79 #ifndef ADDITIONAL_REGISTER_NAMES
  80 #define ADDITIONAL_REGISTER_NAMES               \
  81 {                                               \
  82   {"a1", 0},                                    \
  83   {"a2", 1},                                    \
  84   {"a3", 2},                                    \
  85   {"a4", 3},                                    \
  86   {"v1", 4},                                    \
  87   {"v2", 5},                                    \
  88   {"v3", 6},                                    \
  89   {"v4", 7},                                    \
  90   {"v5", 8},                                    \
  91   {"v6", 9},                                    \
  92   {"rfp", 9}, /* Gcc used to call it this */    \
  93   {"sb", 9},                                    \
  94   {"v7", 10},                                   \
  95   {"r10", 10},  /* sl */                        \
  96   {"r11", 11},  /* fp */                        \
  97   {"r12", 12},  /* ip */                        \
  98   {"r13", 13},  /* sp */                        \
  99   {"r14", 14},  /* lr */                        \
 100   {"r15", 15}   /* pc */                        \
 101 }
 102 #endif
 103
 104 /* Arm Assembler barfs on dollars */
 105 #define DOLLARS_IN_IDENTIFIERS 0
 106
 107 #define NO_DOLLAR_IN_LABEL 1
 108
 109 /* DBX register number for a given compiler register number */
 110 #define DBX_REGISTER_NUMBER(REGNO)  (REGNO)
 111
 112 /* Generate DBX debugging information.  riscix.h will undefine this because
 113    the native assembler does not support stabs. */
 114 #ifndef DBX_DEBUGGING_INFO
 115 #define DBX_DEBUGGING_INFO  1
 116 #endif
 117
 118 /* Acorn dbx moans about continuation chars, so don't use any.  */
 119 #ifndef DBX_CONTIN_LENGTH
 120 #define DBX_CONTIN_LENGTH  0
 121 #endif
 122
 123 /* Output a source filename for the debugger. RISCiX dbx insists that the
 124    ``desc'' field is set to compiler version number >= 315 (sic).  */
 125 #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME)                   \
 126   do                                                                    \
 127     {                                                                   \
 128       fprintf (STREAM, ".stabs ");                                      \
 129       output_quoted_string (STREAM, NAME);                              \
 130       fprintf (STREAM, ",%d,0,315,%s\n", N_SO, &ltext_label_name[1]);   \
 131       text_section ();                                                  \
 132       ASM_OUTPUT_INTERNAL_LABEL (STREAM, "Ltext", 0);                   \
 133     }                                                                   \
 134   while (0)
 135
 136 /* Output a function label definition.  */
 137 #ifndef ASM_DECLARE_FUNCTION_NAME
 138 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 139   do                                                    \
 140     {                                                   \
 141       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 142       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 143     }                                                   \
 144   while (0)
 145 #endif
 146
 147 #ifndef ASM_OUTPUT_LABEL
 148 #define ASM_OUTPUT_LABEL(STREAM, NAME)          \
 149   do                                            \
 150     {                                           \
 151       assemble_name (STREAM,NAME);              \
 152       fputs (":\n", STREAM);                    \
 153     }                                           \
 154   while (0)
 155 #endif
 156
 157 /* Output a globalising directive for a label.  */
 158 #ifndef ASM_GLOBALIZE_LABEL
 159 #define ASM_GLOBALIZE_LABEL(STREAM, NAME)       \
 160   do                                            \
 161     {                                           \
 162       fprintf (STREAM, "\t.global\t");          \
 163       assemble_name (STREAM, NAME);             \
 164       fputc ('\n',STREAM);                      \
 165     }                                           \
 166   while (0)
 167 #endif
 168
 169 /* Make an internal label into a string.  */
 170 #ifndef ASM_GENERATE_INTERNAL_LABEL
 171 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 172   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 173 #endif
 174
 175 /* Construct a private name.  */
 176 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER)  \
 177   ((OUTVAR) = (char *) alloca (strlen (NAME) + 10),  \
 178    sprintf (OUTVAR, "%s.%d", NAME, NUMBER))
 179
 180 /* Output an element of a dispatch table.  */
 181 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)  \
 182   asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE)
 183
 184 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)  \
 185   asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE)
 186
 187 /* Output various types of constants.  For real numbers we output hex, with
 188    a comment containing the "human" value, this allows us to pass NaN's which
 189    the riscix assembler doesn't understand (it also makes cross-assembling
 190    less likely to fail). */
 191
 192 #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE)                           \
 193   do                                                                    \
 194     {                                                                   \
 195       char dstr[30];                                                    \
 196       long l[3];                                                        \
 197       REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l);                      \
 198       REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);                     \
 199       asm_fprintf (STREAM,                                              \
 200                    "\t.long 0x%lx,0x%lx,0x%lx\t%@ long double %s\n",    \
 201                    l[0], l[1], l[2], dstr);                             \
 202     }                                                                   \
 203   while (0)
 204
 205 #define ASM_OUTPUT_DOUBLE(STREAM, VALUE)                                \
 206   do                                                                    \
 207     {                                                                   \
 208       char dstr[30];                                                    \
 209       long l[2];                                                        \
 210       REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l);                           \
 211       REAL_VALUE_TO_DECIMAL (VALUE, "%.14g", dstr);                     \
 212       asm_fprintf (STREAM, "\t.long 0x%lx, 0x%lx\t%@ double %s\n", l[0],\
 213                    l[1], dstr);                                         \
 214     }                                                                   \
 215   while (0)
 216
 217 #define ASM_OUTPUT_FLOAT(STREAM, VALUE)                         \
 218   do                                                            \
 219     {                                                           \
 220       char dstr[30];                                            \
 221       long l;                                                   \
 222       REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);                   \
 223       REAL_VALUE_TO_DECIMAL (VALUE, "%.7g", dstr);              \
 224       asm_fprintf (STREAM, "\t.word 0x%lx\t%@ float %s\n", l,   \
 225                    dstr);                                       \
 226     }                                                           \
 227   while (0)
 228
 229 #define ASM_OUTPUT_INT(STREAM, EXP)             \
 230   do                                            \
 231     {                                           \
 232       fprintf (STREAM, "\t.word\t");            \
 233       OUTPUT_INT_ADDR_CONST (STREAM, EXP);      \
 234       fputc ('\n', STREAM);                     \
 235     }                                           \
 236   while (0)
 237
 238 #define ASM_OUTPUT_SHORT(STREAM, EXP)           \
 239   do                                            \
 240     {                                           \
 241       fprintf (STREAM, "\t.short\t");           \
 242       output_addr_const (STREAM, EXP);          \
 243       fputc ('\n', STREAM);                     \
 244     }                                           \
 245   while (0)
 246
 247 #define ASM_OUTPUT_CHAR(STREAM, EXP)            \
 248   do                                            \
 249     {                                           \
 250       fprintf (STREAM, "\t.byte\t");            \
 251       output_addr_const (STREAM, EXP);          \
 252       fputc ('\n', STREAM);                     \
 253     }                                           \
 254   while (0)
 255
 256 #define ASM_OUTPUT_BYTE(STREAM, VALUE)          \
 257   fprintf (STREAM, "\t.byte\t%d\n", VALUE)
 258
 259 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 260   output_ascii_pseudo_op (STREAM, (const unsigned char *)(PTR), LEN)
 261
 262 /* Output a gap.  In fact we fill it with nulls.  */
 263 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 264   fprintf (STREAM, "\t.space\t%d\n", NBYTES)
 265
 266 /* Align output to a power of two.  Horrible /bin/as.  */
 267 #ifndef ASM_OUTPUT_ALIGN
 268 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 269   do                                                    \
 270     {                                                   \
 271       register int amount = 1 << (POWER);               \
 272                                                         \
 273       if (amount == 2)                                  \
 274         fprintf (STREAM, "\t.even\n");                  \
 275       else if (amount != 1)                             \
 276         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 277     }                                                   \
 278   while (0)
 279 #endif
 280
 281 /* Output a common block */
 282 #ifndef ASM_OUTPUT_COMMON
 283 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 284   do                                                    \
 285     {                                                   \
 286       fprintf (STREAM, "\t.comm\t");                    \
 287       assemble_name (STREAM, NAME);                     \
 288       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 289                    ROUNDED, SIZE);                      \
 290     }                                                   \
 291   while (0)
 292 #endif
 293
 294 /* Output a local common block.  /bin/as can't do this, so hack a
 295    `.space' into the bss segment.  Note that this is *bad* practice,
 296    which is guaranteed NOT to work since it doesn't define STATIC
 297    COMMON space but merely STATIC BSS space.  */
 298 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 299 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 300   do                                                                    \
 301     {                                                                   \
 302       bss_section ();                                                   \
 303       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 304       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 305       fprintf (STREAM, "\t.space\t%d\n", SIZE);                         \
 306     }                                                                   \
 307   while (0)
 308 #endif
 309
 310 /* Output a zero-initialized block.  */
 311 #ifndef ASM_OUTPUT_ALIGNED_BSS
 312 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 313   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 314 #endif
 315
 316 /* Output a source line for the debugger.  */
 317 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM,LINE) */
 318
 319 /* Output a #ident directive.  */
 320 #ifndef ASM_OUTPUT_IDENT
 321 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 322   asm_fprintf (STREAM, "%@ - - - ident %s\n", STRING)
 323 #endif
 324
 325 /* The assembler's parentheses characters.  */
 326 #define ASM_OPEN_PAREN          "("
 327 #define ASM_CLOSE_PAREN         ")"
 328
 329 #ifndef ASM_COMMENT_START
 330 #define ASM_COMMENT_START       "@"
 331 #endif
 332
 333 /* This works for GAS and some other assemblers.  */
 334 #define SET_ASM_OP              "\t.set\t"
 335
 336 #include "arm.h"