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 /* Generate DBX debugging information.  riscix.h will undefine this because
 113    the native assembler does not support stabs. */
 114 #define DBX_DEBUGGING_INFO 1
 115
 116 /* Acorn dbx moans about continuation chars, so don't use any.  */
 117 #ifndef DBX_CONTIN_LENGTH
 118 #define DBX_CONTIN_LENGTH  0
 119 #endif
 120
 121 /* Output a source filename for the debugger. RISCiX dbx insists that the
 122    ``desc'' field is set to compiler version number >= 315 (sic).  */
 123 #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME)                   \
 124   do                                                                    \
 125     {                                                                   \
 126       fprintf (STREAM, ".stabs ");                                      \
 127       output_quoted_string (STREAM, NAME);                              \
 128       fprintf (STREAM, ",%d,0,315,%s\n", N_SO, &ltext_label_name[1]);   \
 129       text_section ();                                                  \
 130       ASM_OUTPUT_INTERNAL_LABEL (STREAM, "Ltext", 0);                   \
 131     }                                                                   \
 132   while (0)
 133
 134 /* Output a function label definition.  */
 135 #ifndef ASM_DECLARE_FUNCTION_NAME
 136 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 137   do                                                    \
 138     {                                                   \
 139       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 140       ASM_OUTPUT_LABEL (STREAM, NAME);                  \
 141     }                                                   \
 142   while (0)
 143 #endif
 144
 145 /* Globalizing directive for a label.  */
 146 #define GLOBAL_ASM_OP "\t.global\t"
 147
 148 /* Make an internal label into a string.  */
 149 #ifndef ASM_GENERATE_INTERNAL_LABEL
 150 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 151   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 152 #endif
 153
 154 /* Construct a private name.  */
 155 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER)  \
 156   ((OUTVAR) = (char *) alloca (strlen (NAME) + 10),  \
 157    sprintf (OUTVAR, "%s.%d", NAME, NUMBER))
 158
 159 /* Output an element of a dispatch table.  */
 160 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)  \
 161   asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE)
 162
 163 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)              \
 164   do                                                                    \
 165     {                                                                   \
 166       if (TARGET_ARM)                                                   \
 167         asm_fprintf (STREAM, "\tb\t%LL%d\n", VALUE);                    \
 168       else                                                              \
 169         asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n", VALUE, REL);     \
 170     }                                                                   \
 171   while (0)
 172
 173
 174 #undef  ASM_OUTPUT_ASCII
 175 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 176   output_ascii_pseudo_op (STREAM, (const unsigned char *)(PTR), LEN)
 177
 178 /* Output a gap.  In fact we fill it with nulls.  */
 179 #undef  ASM_OUTPUT_SKIP
 180 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 181   fprintf (STREAM, "\t.space\t%d\n", NBYTES)
 182
 183 /* Align output to a power of two.  Horrible /bin/as.  */
 184 #ifndef ASM_OUTPUT_ALIGN
 185 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 186   do                                                    \
 187     {                                                   \
 188       register int amount = 1 << (POWER);               \
 189                                                         \
 190       if (amount == 2)                                  \
 191         fprintf (STREAM, "\t.even\n");                  \
 192       else if (amount != 1)                             \
 193         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 194     }                                                   \
 195   while (0)
 196 #endif
 197
 198 /* Output a common block */
 199 #ifndef ASM_OUTPUT_COMMON
 200 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 201   do                                                    \
 202     {                                                   \
 203       fprintf (STREAM, "\t.comm\t");                    \
 204       assemble_name (STREAM, NAME);                     \
 205       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 206                    ROUNDED, SIZE);                      \
 207     }                                                   \
 208   while (0)
 209 #endif
 210
 211 /* Output a local common block.  /bin/as can't do this, so hack a
 212    `.space' into the bss segment.  Note that this is *bad* practice,
 213    which is guaranteed NOT to work since it doesn't define STATIC
 214    COMMON space but merely STATIC BSS space.  */
 215 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 216 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 217   do                                                                    \
 218     {                                                                   \
 219       bss_section ();                                                   \
 220       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 221       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 222       fprintf (STREAM, "\t.space\t%d\n", SIZE);                         \
 223     }                                                                   \
 224   while (0)
 225 #endif
 226
 227 /* Output a zero-initialized block.  */
 228 #ifndef ASM_OUTPUT_ALIGNED_BSS
 229 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 230   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 231 #endif
 232
 233 /* Output a source line for the debugger.  */
 234 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM,LINE) */
 235
 236 /* Output a #ident directive.  */
 237 #ifndef ASM_OUTPUT_IDENT
 238 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 239   asm_fprintf (STREAM, "%@ - - - ident %s\n", STRING)
 240 #endif
 241
 242 #ifndef ASM_COMMENT_START
 243 #define ASM_COMMENT_START       "@"
 244 #endif
 245
 246 /* This works for GAS and some other assemblers.  */
 247 #define SET_ASM_OP              "\t.set\t"