gcc/config/mips/openbsd.h

   1 /* Configuration for  a Mips ABI32 OpenBSD target.
   2    Copyright (C) 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 /* Definitions needed for OpenBSD, to avoid picking mips 'defaults'.  */
  22
  23 /* GAS must know this.  */
  24 #define SUBTARGET_ASM_SPEC "%{fPIC:-KPIC}"
  25
  26 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
  27
  28 /* CPP specific OpenBSD specs.  */
  29 #define SUBTARGET_CPP_SPEC OBSD_CPP_SPEC
  30
  31 /* Needed for ELF (inspired by netbsd-elf).  */
  32 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  33 #define LOCAL_LABEL_PREFIX      "."
  34
  35 /* The profiling lib spec here is not really correct but we leave
  36    it as it is until we have some kind of profiling working.  */
  37 #define LIB_SPEC OBSD_LIB_SPEC
  38
  39 /* By default, OpenBSD mips is little endian.  This is important to set
  40    here as mips/mips.h defaults to big endian.  */
  41 #ifndef TARGET_ENDIAN_DEFAULT
  42 #define TARGET_ENDIAN_DEFAULT 0
  43 #endif
  44
  45 #include <mips/mips.h>
  46
  47 /* Get generic OpenBSD definitions.  */
  48 #define OBSD_HAS_DECLARE_FUNCTION_NAME
  49 #define OBSD_HAS_DECLARE_OBJECT
  50 #define OBSD_HAS_CORRECT_SPECS
  51 #include <openbsd.h>
  52
  53 /* mips assembler uses .set for arcane purposes.  __attribute__((alias))
  54    and friends won't work until we get recent binutils with .weakext
  55         support.  */
  56 #undef SET_ASM_OP
  57
  58 #define TARGET_OS_CPP_BUILTINS()                        \
  59     do {                                                \
  60         builtin_define ("__unix__");                    \
  61         builtin_define ("__SYSTYPE_BSD__");             \
  62         builtin_define ("__NO_LEADING_UNDERSCORES__");  \
  63         builtin_define ("__GP_SUPPORT__");              \
  64         builtin_define ("__OpenBSD__");                 \
  65         builtin_assert ("system=unix");                 \
  66         builtin_assert ("system=OpenBSD");              \
  67         builtin_assert ("machine=mips");                        \
  68 } while (0)
  69
  70 /* Layout of source language data types.  */
  71
  72 /* This must agree with <machine/ansi.h>.  */
  73 #undef SIZE_TYPE
  74 #define SIZE_TYPE "unsigned int"
  75
  76 #undef PTRDIFF_TYPE
  77 #define PTRDIFF_TYPE "int"
  78
  79 #undef WCHAR_TYPE
  80 #define WCHAR_TYPE "int"
  81
  82 #undef WCHAR_TYPE_SIZE
  83 #define WCHAR_TYPE_SIZE 32
  84
  85 /* Controlling the compilation driver.  */
  86
  87 /* LINK_SPEC appropriate for OpenBSD:  support for GCC options
  88    -static, -assert, and -nostdlib. Dynamic loader control.  */
  89 #undef LINK_SPEC
  90 #define LINK_SPEC \
  91   "%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} \
  92    %{bestGnum} %{shared} %{non_shared} \
  93    %{call_shared} %{no_archive} %{exact_version} \
  94    %{!shared: %{!non_shared: %{!call_shared: -non_shared}}} \
  95    %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so} \
  96    %{!nostdlib:%{!r*:%{!e*:-e __start}}} -dc -dp \
  97    %{static:-Bstatic} %{!static:-Bdynamic} %{assert*}"
  98
  99 /* -G is incompatible with -KPIC which is the default, so only allow objects
 100    in the small data section if the user explicitly asks for it.  */
 101 #undef MIPS_DEFAULT_GVALUE
 102 #define MIPS_DEFAULT_GVALUE 0
 103
 104
 105 /* Since gas and gld are standard on OpenBSD, we don't need these.  */
 106 #undef ASM_FINAL_SPEC
 107 #undef STARTFILE_SPEC
 108
 109 /* Switch into a generic section.  */
 110 #undef TARGET_ASM_NAMED_SECTION
 111 #define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section
 112
 113 /* Not having TARGET_GAS here seems a mistake.  If we actually need to
 114    be prepared for file switching, then we need a custom
 115    TARGET_ASM_NAMED_SECTION too.  */
 116
 117 #undef TEXT_SECTION
 118 #define TEXT_SECTION()                          \
 119 do {                                            \
 120   if (TARGET_FILE_SWITCHING)                    \
 121     abort ();                                   \
 122   fputs (TEXT_SECTION_ASM_OP, asm_out_file);    \
 123   fputc ('\n', asm_out_file);                   \
 124 } while (0)
 125
 126 /* collect2 support (Macros for initialization).  */
 127
 128 /* Mips default configuration is COFF-only, and confuses collect2.  */
 129 #undef OBJECT_FORMAT_COFF
 130 #undef EXTENDED_COFF