contrib/gcc/config/dbxelf.h

   1 /* Definitions needed when using stabs embedded in ELF sections.
   2    Copyright (C) 1999 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* This file may be included by any ELF target which wishes to
  22    support -gstabs generating stabs in sections, as produced by gas
  23    and understood by gdb.  */
  24
  25 #ifndef __DBX_ELF_H
  26 #define __DBX_ELF_H
  27
  28 /* Output DBX (stabs) debugging information if doing -gstabs.  */
  29
  30 #undef  DBX_DEBUGGING_INFO
  31 #define DBX_DEBUGGING_INFO
  32
  33 /* Make LBRAC and RBRAC addresses relative to the start of the
  34    function.  The native Solaris stabs debugging format works this
  35    way, gdb expects it, and it reduces the number of relocation
  36    entries...  */
  37
  38 #undef  DBX_BLOCKS_FUNCTION_RELATIVE
  39 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
  40
  41 /* ... but, to make this work, functions must appear prior to line info.  */
  42
  43 #undef  DBX_FUNCTION_FIRST
  44 #define DBX_FUNCTION_FIRST
  45
  46 /* When generating stabs debugging, use N_BINCL entries.  */
  47
  48 #undef  DBX_USE_BINCL
  49 #define DBX_USE_BINCL
  50
  51 /* There is no limit to the length of stabs strings.  */
  52
  53 #ifndef DBX_CONTIN_LENGTH
  54 #define DBX_CONTIN_LENGTH 0
  55 #endif
  56
  57 /* When using stabs, gcc2_compiled must be a stabs entry, not an
  58    ordinary symbol, or gdb won't see it.  Furthermore, since gdb reads
  59    the input piecemeal, starting with each N_SO, it's a lot easier if
  60    the gcc2 flag symbol is *after* the N_SO rather than before it.  So
  61    we emit an N_OPT stab there.  */
  62
  63 #define ASM_IDENTIFY_GCC(FILE)                                          \
  64 do                                                                      \
  65   {                                                                     \
  66     if (write_symbols != DBX_DEBUG)                                     \
  67       fputs ("gcc2_compiled.:\n", FILE);                                \
  68   }                                                                     \
  69 while (0)
  70
  71 #define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE)                             \
  72 do                                                                      \
  73   {                                                                     \
  74     if (write_symbols == DBX_DEBUG)                                     \
  75       fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE);    \
  76   }                                                                     \
  77 while (0)
  78
  79 /* Like block addresses, stabs line numbers are relative to the
  80    current function.  */
  81
  82 #undef  ASM_OUTPUT_SOURCE_LINE
  83 #define ASM_OUTPUT_SOURCE_LINE(FILE, LINE)                              \
  84 do                                                                      \
  85   {                                                                     \
  86     static int sym_lineno = 1;                                          \
  87     char temp[256];                                                     \
  88     ASM_GENERATE_INTERNAL_LABEL (temp, "LM", sym_lineno);               \
  89     fprintf (FILE, ".stabn 68,0,%d,", LINE);                            \
  90     assemble_name (FILE, temp);                                         \
  91     putc ('-', FILE);                                                   \
  92     assemble_name (FILE,                                                \
  93                    XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
  94     putc ('\n', FILE);                                                  \
  95     ASM_OUTPUT_INTERNAL_LABEL (FILE, "LM", sym_lineno);                 \
  96     sym_lineno += 1;                                                    \
  97   }                                                                     \
  98 while (0)
  99
 100 /* Generate a blank trailing N_SO to mark the end of the .o file, since
 101    we can't depend upon the linker to mark .o file boundaries with
 102    embedded stabs.  */
 103
 104 #undef  DBX_OUTPUT_MAIN_SOURCE_FILE_END
 105 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                 \
 106   asm_fprintf (FILE,                                                    \
 107                "\t.text\n\t.stabs \"\",%d,0,0,%LLetext\n%LLetext:\n", N_SO)
 108
 109 #endif /* __DBX_ELF_H */