gcc/config/arm/aout.h

   1 /* Definitions of target machine for GNU compiler, for ARM with a.out
   2    Copyright (C) 1995, 1996, 1997 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 #define ASM_FILE_START(STREAM)                                              \
  28 {                                                                           \
  29   fprintf (STREAM,"%srfp\t.req\t%sr9\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  30   fprintf (STREAM,"%ssl\t.req\t%sr10\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  31   fprintf (STREAM,"%sfp\t.req\t%sr11\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  32   fprintf (STREAM,"%sip\t.req\t%sr12\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  33   fprintf (STREAM,"%ssp\t.req\t%sr13\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  34   fprintf (STREAM,"%slr\t.req\t%sr14\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  35   fprintf (STREAM,"%spc\t.req\t%sr15\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  36 }
  37
  38 #define ASM_APP_ON  ""
  39 #define ASM_APP_OFF  ""
  40
  41 /* Switch to the text or data segment.  */
  42 #define TEXT_SECTION_ASM_OP  ".text"
  43 #define DATA_SECTION_ASM_OP  ".data"
  44 #define BSS_SECTION_ASM_OP   ".bss"
  45
  46 #define REGISTER_PREFIX ""
  47 #define USER_LABEL_PREFIX "_"
  48 #define LOCAL_LABEL_PREFIX ""
  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 }
  59 #endif
  60
  61 #ifndef ADDITIONAL_REGISTER_NAMES
  62 #define ADDITIONAL_REGISTER_NAMES               \
  63 {                                               \
  64   {"a1", 0},                                    \
  65   {"a2", 1},                                    \
  66   {"a3", 2},                                    \
  67   {"a4", 3},                                    \
  68   {"v1", 4},                                    \
  69   {"v2", 5},                                    \
  70   {"v3", 6},                                    \
  71   {"v4", 7},                                    \
  72   {"v5", 8},                                    \
  73   {"v6", 9},                                    \
  74   {"rfp", 9}, /* Gcc used to call it this */    \
  75   {"sb", 9},                                    \
  76   {"v7", 10},                                   \
  77   {"r10", 10},  /* sl */                        \
  78   {"r11", 11},  /* fp */                        \
  79   {"r12", 12},  /* ip */                        \
  80   {"r13", 13},  /* sp */                        \
  81   {"r14", 14},  /* lr */                        \
  82   {"r15", 15}   /* pc */                        \
  83 }
  84 #endif
  85
  86 /* Arm Assembler barfs on dollars */
  87 #define DOLLARS_IN_IDENTIFIERS 0
  88
  89 #define NO_DOLLAR_IN_LABEL
  90
  91 /* DBX register number for a given compiler register number */
  92 #define DBX_REGISTER_NUMBER(REGNO)  (REGNO)
  93
  94 /* Generate DBX debugging information.  riscix.h will undefine this because
  95    the native assembler does not support stabs. */
  96 #define DBX_DEBUGGING_INFO  1
  97
  98 /* Acorn dbx moans about continuation chars, so don't use any.  */
  99 #ifndef DBX_CONTIN_LENGTH
 100 #define DBX_CONTIN_LENGTH  0
 101 #endif
 102
 103 /* Output a source filename for the debugger. RISCiX dbx insists that the
 104    ``desc'' field is set to compiler version number >= 315 (sic).  */
 105 #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM,NAME)                    \
 106 do {                                                                    \
 107   fprintf (STREAM, ".stabs \"%s\",%d,0,315,%s\n", (NAME), N_SO,         \
 108            &ltext_label_name[1]);                                       \
 109   text_section ();                                                      \
 110   ASM_OUTPUT_INTERNAL_LABEL (STREAM, "Ltext", 0);                       \
 111 } while (0)
 112
 113 /* Output a function label definition.  */
 114 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) \
 115     ASM_OUTPUT_LABEL(STREAM, NAME)
 116
 117 #define ARM_OUTPUT_LABEL(STREAM,NAME)   \
 118 do {                                    \
 119   assemble_name (STREAM,NAME);          \
 120   fputs (":\n", STREAM);                \
 121 } while (0)
 122
 123 /* Output a globalising directive for a label.  */
 124 #define ASM_GLOBALIZE_LABEL(STREAM,NAME)  \
 125   (fprintf (STREAM, "\t.global\t"),       \
 126    assemble_name (STREAM, NAME),          \
 127    fputc ('\n',STREAM))                   \
 128
 129 /* Make an internal label into a string.  */
 130 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 131   sprintf (STRING, "*%s%s%d", LOCAL_LABEL_PREFIX, PREFIX, NUM)
 132
 133 /* Nothing special is done about jump tables */
 134 /* #define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE)   */
 135 /* #define ASM_OUTPUT_CASE_END(STREAM,NUM,TABLE)            */
 136
 137 /* Construct a private name.  */
 138 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR,NAME,NUMBER)  \
 139   ((OUTVAR) = (char *) alloca (strlen (NAME) + 10),  \
 140    sprintf ((OUTVAR), "%s.%d", (NAME), (NUMBER)))
 141
 142 /* Output an element of a dispatch table.  */
 143 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE)  \
 144    fprintf (STREAM, "\t.word\t%sL%d\n", LOCAL_LABEL_PREFIX, VALUE)
 145
 146 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,VALUE,REL)  \
 147    fprintf (STREAM, "\tb\t%sL%d\n", LOCAL_LABEL_PREFIX, (VALUE))
 148
 149 /* Output various types of constants.  For real numbers we output hex, with
 150    a comment containing the "human" value, this allows us to pass NaN's which
 151    the riscix assembler doesn't understand (it also makes cross-assembling
 152    less likely to fail). */
 153
 154 #define ASM_OUTPUT_LONG_DOUBLE(STREAM,VALUE)                            \
 155 do { char dstr[30];                                                     \
 156      long l[3];                                                         \
 157      REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l);                       \
 158      REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);                      \
 159      fprintf (STREAM, "\t.long 0x%lx,0x%lx,0x%lx\t%s long double %s\n", \
 160               l[0], l[1], l[2], ASM_COMMENT_START, dstr);               \
 161    } while (0)
 162
 163
 164 #define ASM_OUTPUT_DOUBLE(STREAM, VALUE)                                \
 165 do { char dstr[30];                                                     \
 166      long l[2];                                                         \
 167      REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l);                            \
 168      REAL_VALUE_TO_DECIMAL (VALUE, "%.14g", dstr);                      \
 169      fprintf (STREAM, "\t.long 0x%lx, 0x%lx\t%s double %s\n", l[0],     \
 170               l[1], ASM_COMMENT_START, dstr);                           \
 171    } while (0)
 172
 173 #define ASM_OUTPUT_FLOAT(STREAM, VALUE)                                 \
 174 do { char dstr[30];                                                     \
 175      long l;                                                            \
 176      REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);                            \
 177      REAL_VALUE_TO_DECIMAL (VALUE, "%.7g", dstr);                       \
 178      fprintf (STREAM, "\t.word 0x%lx\t%s float %s\n", l,                \
 179               ASM_COMMENT_START, dstr);                                 \
 180    } while (0);
 181
 182 #define ASM_OUTPUT_INT(STREAM, EXP)             \
 183   {                                             \
 184     fprintf (STREAM, "\t.word\t");              \
 185     OUTPUT_INT_ADDR_CONST (STREAM, (EXP));      \
 186     fputc ('\n', STREAM);                       \
 187   }
 188
 189 #define ASM_OUTPUT_SHORT(STREAM, EXP)  \
 190   (fprintf (STREAM, "\t.short\t"),     \
 191    output_addr_const (STREAM, (EXP)),  \
 192    fputc ('\n', STREAM))
 193
 194 #define ASM_OUTPUT_CHAR(STREAM, EXP)  \
 195   (fprintf (STREAM, "\t.byte\t"),      \
 196    output_addr_const (STREAM, (EXP)),  \
 197    fputc ('\n', STREAM))
 198
 199 #define ASM_OUTPUT_BYTE(STREAM, VALUE)  \
 200   fprintf (STREAM, "\t.byte\t%d\n", VALUE)
 201
 202 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 203   output_ascii_pseudo_op ((STREAM), (unsigned char *)(PTR), (LEN))
 204
 205 /* Output a gap.  In fact we fill it with nulls.  */
 206 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)  \
 207    fprintf (STREAM, "\t.space\t%d\n", NBYTES)
 208
 209 /* Align output to a power of two.  Horrible /bin/as.  */
 210 #define ASM_OUTPUT_ALIGN(STREAM, POWER)  \
 211   do                                                           \
 212     {                                                          \
 213       register int amount = 1 << (POWER);                      \
 214                                                                \
 215       if (amount == 2)                                         \
 216         fprintf (STREAM, "\t.even\n");                         \
 217       else if (amount != 1)                                    \
 218         fprintf (STREAM, "\t.align\t%d\n", amount - 4);        \
 219     } while (0)
 220
 221 /* Output a common block */
 222 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                  \
 223   (fprintf (STREAM, "\t.comm\t"),                                       \
 224    assemble_name ((STREAM), (NAME)),                                    \
 225    fprintf(STREAM, ", %d\t%s %d\n", ROUNDED, ASM_COMMENT_START, SIZE))
 226
 227 /* Output a local common block.  /bin/as can't do this, so hack a `.space' into
 228    the bss segment.  Note that this is *bad* practice.  */
 229 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM,NAME,SIZE,ALIGN)  \
 230   output_lcomm_directive (STREAM, NAME, SIZE, ALIGN)
 231
 232 /* Output a zero-initialized block.  */
 233 #define ASM_OUTPUT_ALIGNED_BSS(STREAM,DECL,NAME,SIZE,ALIGN) \
 234   asm_output_aligned_bss(STREAM, DECL, NAME, SIZE, ALIGN)
 235
 236 /* Output a source line for the debugger.  */
 237 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM,LINE) */
 238
 239 /* Output a #ident directive.  */
 240 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 241   fprintf (STREAM,"- - - ident %s\n",STRING)
 242
 243 /* The assembler's parentheses characters.  */
 244 #define ASM_OPEN_PAREN "("
 245 #define ASM_CLOSE_PAREN ")"
 246
 247 #ifndef ASM_COMMENT_START
 248 #define ASM_COMMENT_START "@"
 249 #endif
 250
 251 /* This works for GAS and some other assemblers.  */
 252 #define SET_ASM_OP      ".set"
 253
 254 #include "arm/arm.h"