gcc/config/i386/cygwin32.h

   1 /* Operating system specific defines to be used when targeting GCC for
   2    hosting on Windows NT 3.x, using a Unix style C library and tools,
   3    as distinct from winnt.h, which is used to build GCC for use with a
   4    windows style library and tool set and uses the Microsoft tools.
   5    Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA. */
  23
  24
  25 #define YES_UNDERSCORES
  26
  27 #define DBX_DEBUGGING_INFO
  28 #define SDB_DEBUGGING_INFO
  29 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  30
  31 #include "i386/gas.h"
  32 #include "dbxcoff.h"
  33
  34 #ifdef CPP_PREDEFINES
  35 #undef CPP_PREDEFINES
  36 #endif
  37
  38 #define CPP_PREDEFINES "-Di386 -D_WIN32 \
  39   -DPOSIX -D__CYGWIN32__ -DWINNT  -D_X86_=1 -D__STDC__=1\
  40   -D__stdcall=__attribute__((__stdcall__)) \
  41   -D__cdecl=__attribute__((__cdecl__)) \
  42   -Asystem(winnt) -Acpu(i386) -Amachine(i386)"
  43
  44 /* We have to dynamic link to get to the system DLLs.  All of libc, libm and
  45    the Unix stuff is in cygwin.dll.  The import library is called
  46    'libcygwin.a'.  For Windows applications, include more libraries, but
  47    always include kernel32.  We'd like to specific subsystem windows to
  48    ld, but that doesn't work just yet.  */
  49
  50 #undef LIB_SPEC
  51 #define LIB_SPEC "-lcygwin %{mwindows:-luser32 -lgdi32 -lcomdlg32} -lkernel32"
  52
  53 #define LINK_SPEC "%{mwindows:--subsystem windows}"
  54
  55 /* Normally, -lgcc is not needed since everything in it is in the DLL, but we
  56    want to allow things to be added to it when installing new versions of
  57    GCC without making a new CYGWIN.DLL, so we leave it.  */
  58
  59 #undef STARTFILE_SPEC
  60 #define STARTFILE_SPEC "crt0%O%s"
  61
  62 #define SIZE_TYPE "unsigned int"
  63 #define PTRDIFF_TYPE "int"
  64 #define WCHAR_UNSIGNED 1
  65 #define WCHAR_TYPE_SIZE 16
  66 #define WCHAR_TYPE "short unsigned int"
  67 #define HAVE_ATEXIT 1
  68
  69 #undef EXTRA_SECTIONS
  70 #define EXTRA_SECTIONS in_ctor, in_dtor
  71
  72 #undef EXTRA_SECTION_FUNCTIONS
  73 #define EXTRA_SECTION_FUNCTIONS                                 \
  74   CTOR_SECTION_FUNCTION                                         \
  75   DTOR_SECTION_FUNCTION
  76
  77 #define CTOR_SECTION_FUNCTION                                   \
  78 void                                                            \
  79 ctor_section ()                                                 \
  80 {                                                               \
  81   if (in_section != in_ctor)                                    \
  82     {                                                           \
  83       fprintf (asm_out_file, "\t.section .ctor\n");             \
  84       in_section = in_ctor;                                     \
  85     }                                                           \
  86 }
  87
  88 #define DTOR_SECTION_FUNCTION                                   \
  89 void                                                            \
  90 dtor_section ()                                                 \
  91 {                                                               \
  92   if (in_section != in_dtor)                                    \
  93     {                                                           \
  94       fprintf (asm_out_file, "\t.section .dtor\n");             \
  95       in_section = in_dtor;                                     \
  96     }                                                           \
  97 }
  98
  99 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)       \
 100   do {                                          \
 101     ctor_section ();                            \
 102     fprintf (FILE, "%s\t", ASM_LONG);           \
 103     assemble_name (FILE, NAME);                 \
 104     fprintf (FILE, "\n");                       \
 105   } while (0)
 106
 107 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)        \
 108   do {                                          \
 109     dtor_section ();                            \
 110     fprintf (FILE, "%s\t", ASM_LONG);           \
 111     assemble_name (FILE, NAME);                 \
 112     fprintf (FILE, "\n");                       \
 113   } while (0)
 114
 115 /* Define this macro if references to a symbol must be treated
 116    differently depending on something about the variable or
 117    function named by the symbol (such as what section it is in).
 118
 119    On i386, if using PIC, mark a SYMBOL_REF for a non-global symbol
 120    so that we may access it directly in the GOT.
 121
 122    On i386 running Windows NT, modify the assembler name with a suffix
 123    consisting of an atsign (@) followed by string of digits that represents
 124    the number of bytes of arguments passed to the function, if it has the
 125    attribute STDCALL. */
 126
 127 #ifdef ENCODE_SECTION_INFO
 128 #undef ENCODE_SECTION_INFO
 129 #define ENCODE_SECTION_INFO(DECL)                                       \
 130 do                                                                      \
 131   {                                                                     \
 132     if (flag_pic)                                                       \
 133       {                                                                 \
 134         rtx rtl = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd'            \
 135                    ? TREE_CST_RTL (DECL) : DECL_RTL (DECL));            \
 136         SYMBOL_REF_FLAG (XEXP (rtl, 0))                                 \
 137           = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd'                  \
 138              || ! TREE_PUBLIC (DECL));                                  \
 139       }                                                                 \
 140     if (TREE_CODE (DECL) == FUNCTION_DECL)                              \
 141       if (lookup_attribute ("stdcall",                                  \
 142                             TYPE_ATTRIBUTES (TREE_TYPE (DECL))))        \
 143         XEXP (DECL_RTL (DECL), 0) =                                     \
 144           gen_rtx (SYMBOL_REF, Pmode, gen_stdcall_suffix (DECL));       \
 145   }                                                                     \
 146 while (0)
 147 #endif
 148
 149 /* Emit code to check the stack when allocating more that 4000
 150    bytes in one go. */
 151
 152 #define CHECK_STACK_LIMIT 4000
 153
 154 /* By default, target has a 80387, uses IEEE compatible arithmetic,
 155    and returns float values in the 387 and needs stack probes */
 156 #undef TARGET_DEFAULT
 157
 158 #define TARGET_DEFAULT \
 159    (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE)
 160
 161 /* This is how to output an assembler line
 162    that says to advance the location counter
 163    to a multiple of 2**LOG bytes.  */
 164
 165 #undef ASM_OUTPUT_ALIGN
 166 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 167     if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
 168
 169 /* For objects going into their own sections, a C expression of name of the
 170    section, expressed as a STRING_CST node, to put DECL into.  The
 171    STRING_CST node must be allocated in the saveable obstack.  Function
 172    build_string can be used to do this.  Define this macro if the name of a
 173    symbol cannot be used as its section name.  */
 174 extern union tree_node *i386_pe_unique_section ();
 175 #define UNIQUE_SECTION(DECL) i386_pe_unique_section (DECL)
 176
 177 #define MAKE_DECL_ONE_ONLY(DECL)                        \
 178   DECL_SECTION_NAME (DECL) = UNIQUE_SECTION (DECL)
 179
 180 /* A C statement to output something to the assembler file to switch to section
 181    NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
 182    NULL_TREE.  Some target formats do not support arbitrary sections.  Do not
 183    define this macro in such cases.  */
 184 #undef ASM_OUTPUT_SECTION_NAME
 185 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME) \
 186 do {                                                            \
 187   if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL)              \
 188     fprintf (STREAM, "\t.section %s,\"x\"\n", (NAME));          \
 189   else if ((DECL) && TREE_READONLY (DECL))                      \
 190     fprintf (STREAM, "\t.section %s,\"\"\n", (NAME));           \
 191   else                                                          \
 192     fprintf (STREAM, "\t.section %s,\"w\"\n", (NAME));          \
 193   /* Functions may have been compiled at various levels of      \
 194      optimization so we can't use `same_size' here.  Instead,   \
 195      have the linker pick one.  */                              \
 196   if ((DECL) && DECL_ONE_ONLY (DECL))                           \
 197     fprintf (STREAM, "\t.linkonce %s\n",                        \
 198              TREE_CODE (DECL) == FUNCTION_DECL                  \
 199              ? "discard" : "same_size");                        \
 200 } while (0)