gcc/config/mips/netbsd.h

   1 /* Definitions for DECstation running BSD as target machine for GNU compiler.
   2    Copyright (C) 1993, 1995, 1996, 1997 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 #define DECSTATION
  22
  23 /* Look for the include files in the system-defined places.  */
  24
  25 #ifndef CROSS_COMPILE
  26 #undef GPLUSPLUS_INCLUDE_DIR
  27 #define GPLUSPLUS_INCLUDE_DIR "/usr/include/g++"
  28
  29 #undef GCC_INCLUDE_DIR
  30 #define GCC_INCLUDE_DIR "/usr/include"
  31
  32 #undef INCLUDE_DEFAULTS
  33 #define INCLUDE_DEFAULTS                        \
  34   {                                             \
  35     { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 },     \
  36     { GCC_INCLUDE_DIR, "GCC", 0, 0 },           \
  37     { 0, 0, 0, 0 }                              \
  38   }
  39
  40 /* Under NetBSD, the normal location of the various *crt*.o files is the
  41    /usr/lib directory.  */
  42
  43 #undef STANDARD_STARTFILE_PREFIX
  44 #define STANDARD_STARTFILE_PREFIX "/usr/lib/"
  45 #endif
  46
  47 /* Provide a LINK_SPEC appropriate for NetBSD.  Here we provide support
  48    for the special GCC options -static, -assert, and -nostdlib.  */
  49
  50 #undef LINK_SPEC
  51 #define LINK_SPEC \
  52   "%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} \
  53    %{!nostartfiles:%{!r*:%{!e*:-e __start}}} -dc -dp %{static:-Bstatic} %{assert*}"
  54
  55 /* We have atexit(3).  */
  56
  57 #define HAVE_ATEXIT
  58
  59 /* Implicit library calls should use memcpy, not bcopy, etc.  */
  60
  61 #define TARGET_MEM_FUNCTIONS
  62
  63 /* Define mips-specific netbsd predefines... */
  64 #ifndef CPP_PREDEFINES
  65 #define CPP_PREDEFINES "-D__ANSI_COMPAT \
  66 -DMIPSEL -DR3000 -DSYSTYPE_BSD -D_SYSTYPE_BSD -D__NetBSD__ -Dmips \
  67 -D__NO_LEADING_UNDERSCORES__ -D__GP_SUPPORT__ \
  68 -Dunix -D_R3000 \
  69 -Asystem(unix) -Asystem(NetBSD) -Amachine(mips)"
  70 #endif
  71
  72 #ifndef SUBTARGET_CPP_SPEC
  73 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
  74 #endif
  75
  76 #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"
  77 #define STARTFILE_SPEC ""
  78
  79 #ifndef MACHINE_TYPE
  80 #define MACHINE_TYPE "NetBSD/pmax"
  81 #endif
  82
  83 #define TARGET_DEFAULT MASK_GAS
  84 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  85
  86 #include "mips/mips.h"
  87
  88 /*
  89  * Some imports from svr4.h in support of shared libraries.
  90  * Currently, we need the DECLARE_OBJECT_SIZE stuff.
  91  */
  92
  93 /* Define the strings used for the special svr4 .type and .size directives.
  94    These strings generally do not vary from one system running svr4 to
  95    another, but if a given system (e.g. m88k running svr) needs to use
  96    different pseudo-op names for these, they may be overridden in the
  97    file which includes this one.  */
  98
  99 #undef TYPE_ASM_OP
 100 #undef SIZE_ASM_OP
 101 #undef WEAK_ASM_OP
 102 #define TYPE_ASM_OP     ".type"
 103 #define SIZE_ASM_OP     ".size"
 104 #define WEAK_ASM_OP     ".weak"
 105
 106 /* The following macro defines the format used to output the second
 107    operand of the .type assembler directive.  Different svr4 assemblers
 108    expect various different forms for this operand.  The one given here
 109    is just a default.  You may need to override it in your machine-
 110    specific tm.h file (depending upon the particulars of your assembler).  */
 111
 112 #undef TYPE_OPERAND_FMT
 113 #define TYPE_OPERAND_FMT        "@%s"
 114
 115 /* Write the extra assembler code needed to declare a function's result.
 116    Most svr4 assemblers don't require any special declaration of the
 117    result value, but there are exceptions.  */
 118
 119 #ifndef ASM_DECLARE_RESULT
 120 #define ASM_DECLARE_RESULT(FILE, RESULT)
 121 #endif
 122
 123 /* These macros generate the special .type and .size directives which
 124    are used to set the corresponding fields of the linker symbol table
 125    entries in an ELF object file under SVR4.  These macros also output
 126    the starting labels for the relevant functions/objects.  */
 127
 128 /* Write the extra assembler code needed to declare a function properly.
 129    Some svr4 assemblers need to also have something extra said about the
 130    function's return value.  We allow for that here.  */
 131
 132 #undef ASM_DECLARE_FUNCTION_NAME
 133 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 134   do {                                                                  \
 135     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);                             \
 136     assemble_name (FILE, NAME);                                         \
 137     putc (',', FILE);                                                   \
 138     fprintf (FILE, TYPE_OPERAND_FMT, "function");                       \
 139     putc ('\n', FILE);                                                  \
 140     ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                      \
 141   } while (0)
 142
 143 /* Write the extra assembler code needed to declare an object properly.  */
 144
 145 #undef ASM_DECLARE_OBJECT_NAME
 146 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 147   do {                                                                  \
 148     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);                             \
 149     assemble_name (FILE, NAME);                                         \
 150     putc (',', FILE);                                                   \
 151     fprintf (FILE, TYPE_OPERAND_FMT, "object");                         \
 152     putc ('\n', FILE);                                                  \
 153     size_directive_output = 0;                                          \
 154     if (!flag_inhibit_size_directive && DECL_SIZE (DECL))               \
 155       {                                                                 \
 156         size_directive_output = 1;                                      \
 157         fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
 158         assemble_name (FILE, NAME);                                     \
 159         fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL))); \
 160       }                                                                 \
 161     ASM_OUTPUT_LABEL(FILE, NAME);                                       \
 162   } while (0)
 163
 164 /* Output the size directive for a decl in rest_of_decl_compilation
 165    in the case where we did not do so before the initializer.
 166    Once we find the error_mark_node, we know that the value of
 167    size_directive_output was set
 168    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
 169
 170 #undef ASM_FINISH_DECLARE_OBJECT
 171 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 172 do {                                                                     \
 173      char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);                   \
 174      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 175          && ! AT_END && TOP_LEVEL                                        \
 176          && DECL_INITIAL (DECL) == error_mark_node                       \
 177          && !size_directive_output)                                      \
 178        {                                                                 \
 179          size_directive_output = 1;                                      \
 180          fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
 181          assemble_name (FILE, name);                                     \
 182          fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL))); \
 183        }                                                                 \
 184    } while (0)
 185
 186 /* This is how to declare the size of a function.  */
 187
 188 #undef ASM_DECLARE_FUNCTION_SIZE
 189 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 190   do {                                                                  \
 191     if (!flag_inhibit_size_directive)                                   \
 192       {                                                                 \
 193         char label[256];                                                \
 194         static int labelno;                                             \
 195         labelno++;                                                      \
 196         ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno);            \
 197         ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno);               \
 198         fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
 199         assemble_name (FILE, (FNAME));                                  \
 200         fprintf (FILE, ",");                                            \
 201         assemble_name (FILE, label);                                    \
 202         fprintf (FILE, "-");                                            \
 203         assemble_name (FILE, (FNAME));                                  \
 204         putc ('\n', FILE);                                              \
 205       }                                                                 \
 206   } while (0)
 207
 208 /*
 209  A C statement to output something to the assembler file to switch to section
 210  NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
 211  NULL_TREE.  Some target formats do not support arbitrary sections.  Do not
 212  define this macro in such cases.
 213 */
 214 #define ASM_OUTPUT_SECTION_NAME(F, DECL, NAME, RELOC)                        \
 215 do {                                                                         \
 216   extern FILE *asm_out_text_file;                                            \
 217   if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL)                           \
 218     fprintf (asm_out_text_file, "\t.section %s,\"ax\",@progbits\n", (NAME)); \
 219   else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC))                    \
 220     fprintf (F, "\t.section %s,\"a\",@progbits\n", (NAME));                  \
 221   else                                                                       \
 222     fprintf (F, "\t.section %s,\"aw\",@progbits\n", (NAME));                 \
 223 } while (0)
 224
 225 /* Since gas and gld are standard on NetBSD, we don't need these */
 226 #undef ASM_FINAL_SPEC
 227 #undef STARTFILE_SPEC