gcc/config/i386/netbsd-elf.h

   1 /* Definitions of target machine for GCC,
   2    for i386/ELF NetBSD systems.
   3    Copyright (C) 2001, 2002, 2004 Free Software Foundation, Inc.
   4    Contributed by matthew green <mrg@eterna.com.au>
   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 #define TARGET_OS_CPP_BUILTINS()                \
  24   do                                            \
  25     {                                           \
  26       NETBSD_OS_CPP_BUILTINS_ELF();             \
  27     }                                           \
  28   while (0)
  29
  30
  31 /* Extra specs needed for NetBSD/i386 ELF.  */
  32
  33 #undef SUBTARGET_EXTRA_SPECS
  34 #define SUBTARGET_EXTRA_SPECS                   \
  35   { "netbsd_cpp_spec", NETBSD_CPP_SPEC },       \
  36   { "netbsd_entry_point", NETBSD_ENTRY_POINT },
  37
  38
  39 /* Provide a LINK_SPEC appropriate for a NetBSD/i386 ELF target.  */
  40
  41 #undef LINK_SPEC
  42 #define LINK_SPEC NETBSD_LINK_SPEC_ELF
  43
  44 #define NETBSD_ENTRY_POINT "__start"
  45
  46
  47 /* Provide a CPP_SPEC appropriate for NetBSD.  */
  48
  49 #undef CPP_SPEC
  50 #define CPP_SPEC "%(netbsd_cpp_spec)"
  51
  52
  53 /* Make gcc agree with <machine/ansi.h> */
  54
  55 #undef SIZE_TYPE
  56 #define SIZE_TYPE "unsigned int"
  57
  58 #undef PTRDIFF_TYPE
  59 #define PTRDIFF_TYPE "int"
  60
  61 #undef ASM_APP_ON
  62 #define ASM_APP_ON "#APP\n"
  63
  64 #undef ASM_APP_OFF
  65 #define ASM_APP_OFF "#NO_APP\n"
  66
  67 #undef ASM_COMMENT_START
  68 #define ASM_COMMENT_START "#"
  69
  70 #undef DBX_REGISTER_NUMBER
  71 #define DBX_REGISTER_NUMBER(n)  svr4_dbx_register_map[n]
  72
  73
  74 /* Output assembler code to FILE to call the profiler.  */
  75
  76 #undef NO_PROFILE_COUNTERS
  77 #define NO_PROFILE_COUNTERS     1
  78
  79 #undef FUNCTION_PROFILER
  80 #define FUNCTION_PROFILER(FILE, LABELNO)                                \
  81 {                                                                       \
  82   if (flag_pic)                                                         \
  83     fprintf (FILE, "\tcall __mcount@PLT\n");                            \
  84   else                                                                  \
  85     fprintf (FILE, "\tcall __mcount\n");                                \
  86 }
  87
  88
  89 #undef HAS_INIT_SECTION
  90
  91 /* This is how we tell the assembler that two symbols have the same value.  */
  92
  93 #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
  94   do { assemble_name(FILE, NAME1);       \
  95        fputs(" = ", FILE);               \
  96        assemble_name(FILE, NAME2);       \
  97        fputc('\n', FILE); } while (0)
  98
  99 /* A C statement to output to the stdio stream FILE an assembler
 100    command to advance the location counter to a multiple of 1<<LOG
 101    bytes if it is within MAX_SKIP bytes.
 102
 103    This is used to align code labels according to Intel recommendations.  */
 104
 105 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
 106 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)                  \
 107   if ((LOG) != 0) {                                                     \
 108     if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));    \
 109     else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));    \
 110   }
 111 #endif
 112
 113 /* We always use gas here, so we don't worry about ECOFF assembler
 114    problems.  */
 115 #undef TARGET_GAS
 116 #define TARGET_GAS      1
 117
 118 /* Default to pcc-struct-return, because this is the ELF abi and
 119    we don't care about compatibility with older gcc versions.  */
 120 #define DEFAULT_PCC_STRUCT_RETURN 1
 121
 122 /* Attempt to enable execute permissions on the stack.  */
 123 #define ENABLE_EXECUTE_STACK NETBSD_ENABLE_EXECUTE_STACK
 124
 125 #define TARGET_VERSION fprintf (stderr, " (NetBSD/i386 ELF)");