gcc/config/mips/netbsd.h

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