gcc/config/mips/elf64.h

   1 /* Definitions of target machine for GNU compiler.  MIPS R4000 version with
   2    GOFAST floating point library.
   3    Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2002
   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 #undef ASM_DECLARE_OBJECT_NAME
  55 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
  56
  57 #undef ASM_FINISH_DECLARE_OBJECT
  58 #define ASM_FINISH_DECLARE_OBJECT mips_finish_declare_object
  59
  60 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                            \
  61  do { fputc ( '\t', FILE);                                            \
  62       assemble_name (FILE, LABEL1);                                   \
  63       fputs ( " = ", FILE);                                           \
  64       assemble_name (FILE, LABEL2);                                   \
  65       fputc ( '\n', FILE);                                            \
  66  } while (0)
  67
  68 /* Note about .weak vs. .weakext
  69    The mips native assemblers support .weakext, but not .weak.
  70    mips-elf gas supports .weak, but not .weakext.
  71    mips-elf gas has been changed to support both .weak and .weakext,
  72    but until that support is generally available, the 'if' below
  73    should serve.  */
  74
  75 #undef ASM_WEAKEN_LABEL
  76 #define ASM_WEAKEN_LABEL(FILE,NAME) ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,0)
  77 #define ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,VALUE)  \
  78  do {                                           \
  79   if (TARGET_GAS)                               \
  80       fputs ("\t.weak\t", FILE);                \
  81   else                                          \
  82       fputs ("\t.weakext\t", FILE);             \
  83   assemble_name (FILE, NAME);                   \
  84   if (VALUE)                                    \
  85     {                                           \
  86       fputc (' ', FILE);                        \
  87       assemble_name (FILE, VALUE);              \
  88     }                                           \
  89   fputc ('\n', FILE);                           \
  90  } while (0)
  91
  92 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
  93
  94 /* On elf, we *do* have support for the .init and .fini sections, and we
  95    can put stuff in there to be executed before and after `main'.  We let
  96    crtstuff.c and other files know this by defining the following symbols.
  97    The definitions say how to change sections to the .init and .fini
  98    sections.  This is the same for all known elf assemblers.  */
  99
 100 #undef  INIT_SECTION_ASM_OP
 101 #define INIT_SECTION_ASM_OP     "\t.section\t.init"
 102 #undef  FINI_SECTION_ASM_OP
 103 #define FINI_SECTION_ASM_OP     "\t.section\t.fini"
 104
 105 /* Don't set the target flags, this is done by the linker script */
 106 #undef LIB_SPEC
 107 #define LIB_SPEC ""
 108
 109 #undef  STARTFILE_SPEC
 110 #define STARTFILE_SPEC "crti%O%s crtbegin%O%s"
 111
 112 #undef  ENDFILE_SPEC
 113 #define ENDFILE_SPEC "crtend%O%s crtn%O%s"
 114
 115 /* We support #pragma.  */
 116 #define HANDLE_SYSV_PRAGMA 1