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 /* CPP specific OpenBSD specs.  */
  27 #define SUBTARGET_CPP_SPEC OBSD_CPP_SPEC
  28
  29 /* Needed for ELF (inspired by netbsd-elf).  */
  30 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  31 #define LOCAL_LABEL_PREFIX      "."
  32
  33 /* The profiling lib spec here is not really correct but we leave
  34    it as it is until we have some kind of profiling working.  */
  35 #define LIB_SPEC OBSD_LIB_SPEC
  36
  37 /* By default, OpenBSD mips is little endian.  This is important to set
  38    here as mips/mips.h defaults to big endian unless DECSTATION.  */
  39 #ifndef TARGET_ENDIAN_DEFAULT
  40 #define TARGET_ENDIAN_DEFAULT 0
  41 #endif
  42
  43 #include <mips/mips.h>
  44
  45 /* Get generic OpenBSD definitions.  */
  46 #define OBSD_HAS_DECLARE_FUNCTION_NAME
  47 #define OBSD_HAS_DECLARE_OBJECT
  48 #define OBSD_HAS_CORRECT_SPECS
  49 #include <openbsd.h>
  50
  51 /* mips assembler uses .set for arcane purposes.  __attribute__((alias))
  52    and friends won't work until we get recent binutils with .weakext
  53         support.  */
  54 #undef SET_ASM_OP
  55
  56 /* Run-time target specifications.  */
  57 #if TARGET_ENDIAN_DEFAULT != 0
  58 #define CPP_PREDEFINES "-D__SYSTYPE_BSD__ -D__NO_LEADING_UNDERSCORES__ \
  59 -D__GP_SUPPORT__ -D__MIPSEB__ -D__unix__  -D__OpenBSD__ -D__mips__ \
  60 -Asystem=unix -Asystem=OpenBSD -Acpu=mips -Amachine=mips -Aendian=big"
  61 #else
  62 #define CPP_PREDEFINES "-D__SYSTYPE_BSD__ -D__NO_LEADING_UNDERSCORES__ \
  63 -D__GP_SUPPORT__ -D__MIPSEL__ -D__unix__  -D__OpenBSD__ -D__mips__ \
  64 -Asystem=unix -Asystem=OpenBSD -Acpu=mips -Amachine=mips -Aendian=little"
  65 #endif
  66
  67 /* Layout of source language data types.  */
  68
  69 /* This must agree with <machine/ansi.h>.  */
  70 #undef SIZE_TYPE
  71 #define SIZE_TYPE "unsigned int"
  72
  73 #undef PTRDIFF_TYPE
  74 #define PTRDIFF_TYPE "int"
  75
  76 #undef WCHAR_TYPE
  77 #define WCHAR_TYPE "int"
  78
  79 #undef WCHAR_TYPE_SIZE
  80 #define WCHAR_TYPE_SIZE 32
  81
  82 /* Controlling the compilation driver.  */
  83
  84 /* LINK_SPEC appropriate for OpenBSD:  support for GCC options
  85    -static, -assert, and -nostdlib. Dynamic loader control.  */
  86 #undef LINK_SPEC
  87 #define LINK_SPEC \
  88   "%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} \
  89    %{bestGnum} %{shared} %{non_shared} \
  90    %{call_shared} %{no_archive} %{exact_version} \
  91    %{!shared: %{!non_shared: %{!call_shared: -non_shared}}} \
  92    %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so} \
  93    %{!nostdlib:%{!r*:%{!e*:-e __start}}} -dc -dp \
  94    %{static:-Bstatic} %{!static:-Bdynamic} %{assert*}"
  95
  96 /* -G is incompatible with -KPIC which is the default, so only allow objects
  97    in the small data section if the user explicitly asks for it.  */
  98 #undef MIPS_DEFAULT_GVALUE
  99 #define MIPS_DEFAULT_GVALUE 0
 100
 101
 102 /* Since gas and gld are standard on OpenBSD, we don't need these.  */
 103 #undef ASM_FINAL_SPEC
 104 #undef STARTFILE_SPEC
 105
 106 /* A C statement to output something to the assembler file to switch to
 107    section NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL
 108    or NULL_TREE.  Some target formats do not support arbitrary sections.
 109    Do not define this macro in such cases. mips.h doesn't define this,
 110    do it here.  */
 111 #define ASM_OUTPUT_SECTION_NAME(F, DECL, NAME, RELOC)                        \
 112 do {                                                                         \
 113   extern FILE *asm_out_text_file;                                            \
 114   if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL)                           \
 115     fprintf (asm_out_text_file, "\t.section %s,\"ax\",@progbits\n", (NAME)); \
 116   else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC))                    \
 117     fprintf (F, "\t.section %s,\"a\",@progbits\n", (NAME));                  \
 118   else if (! strcmp (NAME, ".bss"))                                          \
 119     fprintf (F, "\t.section %s,\"aw\",@nobits\n", (NAME));                   \
 120   else                                                                       \
 121     fprintf (F, "\t.section %s,\"aw\",@progbits\n", (NAME));                 \
 122 } while (0)
 123
 124 /* collect2 support (Macros for initialization).  */
 125
 126 /* Mips default configuration is COFF-only, and confuses collect2.  */
 127 #undef OBJECT_FORMAT_COFF
 128 #undef EXTENDED_COFF