gcc/defaults.h

   1 /* Definitions of various defaults for how to do assembler output
   2    (most of which are designed to be appropriate for GAS or for
   3    some BSD assembler).
   4    Copyright (C) 1992, 1996, 1997, 1998 Free Software Foundation, Inc.
   5    Contributed by Ron Guilmette (rfg@monkeys.com)
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* Store in OUTPUT a string (made with alloca) containing
  25    an assembler-name for a local static variable or function named NAME.
  26    LABELNO is an integer which is different for each call.  */
  27
  28 #ifndef ASM_FORMAT_PRIVATE_NAME
  29 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)                  \
  30   do {                                                                  \
  31     int len = strlen (NAME);                                            \
  32     char *temp = (char *) alloca (len + 3);                             \
  33     temp[0] = 'L';                                                      \
  34     strcpy (&temp[1], (NAME));                                          \
  35     temp[len + 1] = '.';                                                \
  36     temp[len + 2] = 0;                                                  \
  37     (OUTPUT) = (char *) alloca (strlen (NAME) + 11);                    \
  38     ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO);                \
  39   } while (0)
  40 #endif
  41
  42 #ifndef ASM_STABD_OP
  43 #define ASM_STABD_OP ".stabd"
  44 #endif
  45
  46 /* This is how to output an element of a case-vector that is absolute.
  47    Some targets don't use this, but we have to define it anyway.  */
  48
  49 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
  50 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
  51 do { fprintf (FILE, "\t%s\t", ASM_LONG);                                \
  52      ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE));                    \
  53      fputc ('\n', FILE);                                                \
  54    } while (0)
  55 #endif
  56
  57 /* choose a reasonable default for ASM_OUTPUT_ASCII.  */
  58
  59 #ifndef ASM_OUTPUT_ASCII
  60 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  61   do {                                                                        \
  62     FILE *_hide_asm_out_file = (MYFILE);                                      \
  63     unsigned char *_hide_p = (unsigned char *) (MYSTRING);                    \
  64     int _hide_thissize = (MYLENGTH);                                          \
  65     {                                                                         \
  66       FILE *asm_out_file = _hide_asm_out_file;                                \
  67       unsigned char *p = _hide_p;                                             \
  68       int thissize = _hide_thissize;                                          \
  69       int i;                                                                  \
  70       fprintf (asm_out_file, "\t.ascii \"");                                  \
  71                                                                               \
  72       for (i = 0; i < thissize; i++)                                          \
  73         {                                                                     \
  74           register int c = p[i];                                              \
  75           if (c == '\"' || c == '\\')                                         \
  76             putc ('\\', asm_out_file);                                        \
  77           if (c >= ' ' && c < 0177)                                           \
  78             putc (c, asm_out_file);                                           \
  79           else                                                                \
  80             {                                                                 \
  81               fprintf (asm_out_file, "\\%o", c);                              \
  82               /* After an octal-escape, if a digit follows,                   \
  83                  terminate one string constant and start another.             \
  84                  The Vax assembler fails to stop reading the escape           \
  85                  after three digits, so this is the only way we               \
  86                  can get it to parse the data properly.  */                   \
  87               if (i < thissize - 1                                            \
  88                   && p[i + 1] >= '0' && p[i + 1] <= '9')                      \
  89                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  90           }                                                                   \
  91         }                                                                     \
  92       fprintf (asm_out_file, "\"\n");                                         \
  93     }                                                                         \
  94   }                                                                           \
  95   while (0)
  96 #endif
  97
  98 #ifndef ASM_IDENTIFY_GCC
  99   /* Default the definition, only if ASM_IDENTIFY_GCC is not set,
 100      because if it is set, we might not want ASM_IDENTIFY_LANGUAGE
 101      outputting labels, if we do want it to, then it must be defined
 102      in the tm.h file.  */
 103 #ifndef ASM_IDENTIFY_LANGUAGE
 104 #define ASM_IDENTIFY_LANGUAGE(FILE) output_lang_identify (FILE);
 105 #endif
 106 #endif
 107
 108 /* This is how we tell the assembler to equate two values.  */
 109 #ifdef SET_ASM_OP
 110 #ifndef ASM_OUTPUT_DEF
 111 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 112  do {   fprintf ((FILE), "\t%s\t", SET_ASM_OP);                         \
 113         assemble_name (FILE, LABEL1);                                   \
 114         fprintf (FILE, ",");                                            \
 115         assemble_name (FILE, LABEL2);                                   \
 116         fprintf (FILE, "\n");                                           \
 117   } while (0)
 118 #endif
 119 #endif
 120
 121 /* This is how to output a reference to a user-level label named NAME.  */
 122
 123 #ifndef ASM_OUTPUT_LABELREF
 124 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 125 #endif
 126
 127 /* This determines whether or not we support weak symbols.  */
 128 #ifndef SUPPORTS_WEAK
 129 #ifdef ASM_WEAKEN_LABEL
 130 #define SUPPORTS_WEAK 1
 131 #else
 132 #define SUPPORTS_WEAK 0
 133 #endif
 134 #endif
 135
 136 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 137    provide a weak attribute.  Else define it to nothing.
 138
 139    This would normally belong in gansidecl.h, but SUPPORTS_WEAK is
 140    not available at that time.
 141
 142    Note, this is only for use by target files which we know are to be
 143    compiled by GCC.  */
 144 #ifndef TARGET_ATTRIBUTE_WEAK
 145 # if SUPPORTS_WEAK
 146 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 147 # else
 148 #  define TARGET_ATTRIBUTE_WEAK
 149 # endif
 150 #endif
 151
 152 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 153    the rest of the DWARF 2 frame unwind support is also provided.  */
 154 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 155 #define DWARF2_UNWIND_INFO 1
 156 #endif