gcc/config/mips/elf.h

   1 /* Definitions of target machine for GNU compiler.  MIPS R3000 version with
   2    GOFAST floating point library.
   3    Copyright (C) 1994, 1997, 1999, 2000, 2002, 2003, 2004
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC 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 GCC 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 GCC; 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 /* Biggest alignment supported by the object file format of this
  24    machine.  Use this macro to limit the alignment which can be
  25    specified using the `__attribute__ ((aligned (N)))' construct.  If
  26    not defined, the default value is `BIGGEST_ALIGNMENT'.  */
  27
  28 #undef  MAX_OFILE_ALIGNMENT
  29 #define MAX_OFILE_ALIGNMENT (32768*8)
  30
  31 /* Switch into a generic section.  */
  32 #undef  TARGET_ASM_NAMED_SECTION
  33 #define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section
  34
  35 /* The following macro defines the format used to output the second
  36    operand of the .type assembler directive.  Different svr4 assemblers
  37    expect various different forms for this operand.  The one given here
  38    is just a default.  You may need to override it in your machine-
  39    specific tm.h file (depending upon the particulars of your assembler).  */
  40
  41 #define TYPE_OPERAND_FMT        "@%s"
  42
  43 /* Define the strings used for the special svr4 .type and .size directives.
  44    These strings generally do not vary from one system running svr4 to
  45    another, but if a given system (e.g. m88k running svr) needs to use
  46    different pseudo-op names for these, they may be overridden in the
  47    file which includes this one.  */
  48
  49 #undef TYPE_ASM_OP
  50 #undef SIZE_ASM_OP
  51 #define TYPE_ASM_OP     "\t.type\t"
  52 #define SIZE_ASM_OP     "\t.size\t"
  53
  54 /* If defined, a C expression whose value is a string containing the
  55    assembler operation to identify the following data as
  56    uninitialized global data.  If not defined, and neither
  57    `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
  58    uninitialized global data will be output in the data section if
  59    `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
  60    used.  */
  61
  62 #ifndef BSS_SECTION_ASM_OP
  63 #define BSS_SECTION_ASM_OP      "\t.section\t.bss"
  64 #endif
  65
  66 #ifndef ASM_OUTPUT_ALIGNED_BSS
  67 #define ASM_OUTPUT_ALIGNED_BSS mips_output_aligned_bss
  68 #endif
  69
  70 #undef ASM_DECLARE_OBJECT_NAME
  71 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
  72
  73 #undef ASM_FINISH_DECLARE_OBJECT
  74 #define ASM_FINISH_DECLARE_OBJECT mips_finish_declare_object
  75
  76 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                            \
  77  do { fputc ( '\t', FILE);                                            \
  78       assemble_name (FILE, LABEL1);                                   \
  79       fputs ( " = ", FILE);                                           \
  80       assemble_name (FILE, LABEL2);                                   \
  81       fputc ( '\n', FILE);                                            \
  82  } while (0)
  83
  84 /* Note about .weak vs. .weakext
  85    The mips native assemblers support .weakext, but not .weak.
  86    mips-elf gas supports .weak, but not .weakext.
  87    mips-elf gas has been changed to support both .weak and .weakext,
  88    but until that support is generally available, the 'if' below
  89    should serve.  */
  90
  91 #undef  ASM_WEAKEN_LABEL
  92 #define ASM_WEAKEN_LABEL(FILE,NAME) ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,0)
  93 #define ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,VALUE)  \
  94  do {                                           \
  95   if (TARGET_GAS)                               \
  96       fputs ("\t.weak\t", FILE);                \
  97   else                                          \
  98       fputs ("\t.weakext\t", FILE);             \
  99   assemble_name (FILE, NAME);                   \
 100   if (VALUE)                                    \
 101     {                                           \
 102       fputc (' ', FILE);                        \
 103       assemble_name (FILE, VALUE);              \
 104     }                                           \
 105   fputc ('\n', FILE);                           \
 106  } while (0)
 107
 108 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 109
 110 /* On elf, we *do* have support for the .init and .fini sections, and we
 111    can put stuff in there to be executed before and after `main'.  We let
 112    crtstuff.c and other files know this by defining the following symbols.
 113    The definitions say how to change sections to the .init and .fini
 114    sections.  This is the same for all known elf assemblers.  */
 115
 116 #undef  INIT_SECTION_ASM_OP
 117 #define INIT_SECTION_ASM_OP     "\t.section\t.init"
 118 #undef  FINI_SECTION_ASM_OP
 119 #define FINI_SECTION_ASM_OP     "\t.section\t.fini"
 120
 121 /* Don't set the target flags, this is done by the linker script */
 122 #undef  LIB_SPEC
 123 #define LIB_SPEC ""
 124
 125 #undef  STARTFILE_SPEC
 126 #define STARTFILE_SPEC "crti%O%s crtbegin%O%s"
 127
 128 #undef  ENDFILE_SPEC
 129 #define ENDFILE_SPEC "crtend%O%s crtn%O%s"
 130
 131 /* We support #pragma.  */
 132 #define HANDLE_SYSV_PRAGMA 1