gcc/config/ia64/aix.h

   1 /* Definitions of target machine GNU compiler.  IA-64/AIX version.
   2    Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by Timothy Wall (twall@cygnus.com)
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* AIX5 (aka Monterey): a mix of AIX and UnixWare.
  23    This file is loosely based on ia64/linux.h.  */
  24
  25 /* This macro is a C statement to print on `stderr' a string describing the
  26    particular machine description choice.  */
  27
  28 #define TARGET_VERSION fprintf (stderr, " (IA-64) AIX");
  29
  30 #undef ASM_APP_ON
  31 #define ASM_APP_ON "#APP\n"
  32
  33 #undef ASM_APP_OFF
  34 #define ASM_APP_OFF "#NO_APP\n"
  35
  36 #define SET_ASM_OP      "\t.set\t"
  37
  38 #undef MD_EXEC_PREFIX
  39 #undef MD_STARTFILE_PREFIX
  40 #define MD_STARTFILE_PREFIX "/usr/lib/ia64l64/"
  41
  42 /* Output at beginning of assembler file.  */
  43 /* The .file command should always begin the output.  */
  44 #undef ASM_FILE_START
  45 #define ASM_FILE_START(FILE)                                            \
  46   do {                                                                  \
  47         output_file_directive (FILE, main_input_filename);              \
  48         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
  49   } while (0)
  50
  51 /* Provide a STARTFILE_SPEC appropriate for AIX.  Here we add
  52    the crti C++ startup files file which provide part of the support
  53    for getting C++ file-scope static object constructed before entering
  54    `main'.  */
  55
  56 #undef  STARTFILE_SPEC
  57 #define STARTFILE_SPEC \
  58 "%{!shared: \
  59    %{pg:gcrt1_64.o%s} %{!pg:%{p:mcrt1_64.o%s} \
  60                         %{!p:%{profile:gcrt1_64.o%s} \
  61                           %{!profile:crt1_64.o%s}}}} \
  62  crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  63
  64 /* Provide a ENDFILE_SPEC appropriate for AIX.  Here we tack on
  65    the crtn file which provides termination of the support for getting C++
  66    file-scope static object constructed before entering `main'.  */
  67
  68 #undef  ENDFILE_SPEC
  69 #define ENDFILE_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  70
  71 /* Define this so we can compile MS code for use with WINE.  */
  72 #define HANDLE_PRAGMA_PACK_PUSH_POP
  73
  74 /* A C string constant that tells the GNU CC driver program options to pass to
  75    CPP.  It can also specify how to translate options you give to GNU CC into
  76    options for GNU CC to pass to the CPP.  */
  77
  78 /* If -ansi, we need to define _ANSI_C_SOURCE to get the right headers.  */
  79 #undef CPP_SPEC
  80 #define CPP_SPEC "\
  81 %{mcpu=itanium:-D__itanium__} %{mbig-endian:-D__BIG_ENDIAN__} \
  82 %{ansi:-D_ANSI_C_SOURCE} \
  83 %{posix:-D_POSIX_SOURCE} \
  84 %{cpp_cpu} \
  85 -D__LONG_MAX__=9223372036854775807L"
  86
  87 #undef CPP_PREDEFINES
  88 #define CPP_PREDEFINES "\
  89 -D__ia64 -D__ia64__ -D_AIX -D_AIX64 -D_LONGLONG -Dunix \
  90 -D__LP64__ -D__ELF__ -Asystem=unix -Asystem=aix -Acpu=ia64 -Amachine=ia64 \
  91 -D__64BIT__ -D_LONG_LONG -D_IA64 -D__int128=__size128_t"
  92
  93 /* The GNU C++ standard library requires that these macros be defined.  */
  94 #undef CPLUSPLUS_CPP_SPEC
  95 #define CPLUSPLUS_CPP_SPEC                      \
  96   "-D_XOPEN_SOURCE=500                          \
  97    -D_XOPEN_SOURCE_EXTENDED=1                   \
  98    -D_LARGE_FILE_API                            \
  99    -D_ALL_SOURCE                                \
 100    -D__LONG_MAX__=9223372036854775807L          \
 101    %{cpp_cpu}"
 102
 103 /* ia64-specific options for gas */
 104 #undef ASM_SPEC
 105 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic}"
 106
 107 /* Define this for shared library support.  */
 108
 109 #undef LINK_SPEC
 110 #define LINK_SPEC "\
 111 %{shared:-shared} \
 112 %{!shared: \
 113   %{!static: \
 114     %{rdynamic:-export-dynamic} \
 115     %{!dynamic-linker:-dynamic-linker /usr/lib/ia64l64/libc.so.1}} \
 116     %{static:-static}}"
 117
 118 #define DONT_USE_BUILTIN_SETJMP
 119 #define JMP_BUF_SIZE  85
 120
 121 /* Output any profiling code before the prologue.  */
 122
 123 #undef PROFILE_BEFORE_PROLOGUE
 124 #define PROFILE_BEFORE_PROLOGUE 1
 125
 126 /* A C statement or compound statement to output to FILE some assembler code to
 127    call the profiling subroutine `mcount'.
 128
 129    FIXME this is not supported until xlC supports it and can thus tell us
 130    how to do it.
 131 */
 132
 133 #undef FUNCTION_PROFILER
 134 #define FUNCTION_PROFILER(FILE, LABELNO)                \
 135 do {                                                    \
 136 } while (0)
 137
 138 /* Tell the linker where to find the crt*.o files.  */
 139
 140 #ifndef CROSS_COMPILE
 141 #undef STANDARD_STARTFILE_PREFIX
 142 #define STANDARD_STARTFILE_PREFIX "/usr/lib/ia64l64/"
 143 #endif
 144
 145 /* Override SELECT_SECTION and SELECT_RTX_SECTION from config/ia64/sysv4.h;
 146    these definitions ignore flag_pic as if it were always set;
 147    it is illegal to have relocations in shared segments on AIX.  */
 148
 149 /* A C statement or statements to switch to the appropriate
 150    section for output of DECL.  DECL is either a `VAR_DECL' node
 151    or a constant of some sort.  RELOC indicates whether forming
 152    the initial value of DECL requires link-time relocations.  */
 153
 154 #undef SELECT_SECTION
 155 #define SELECT_SECTION(DECL,RELOC,ALIGN)                                \
 156 {                                                                       \
 157   if (TREE_CODE (DECL) == STRING_CST)                                   \
 158     {                                                                   \
 159       if (! flag_writable_strings)                                      \
 160         const_section ();                                               \
 161       else                                                              \
 162         data_section ();                                                \
 163     }                                                                   \
 164   else if (TREE_CODE (DECL) == VAR_DECL)                                \
 165     {                                                                   \
 166       if (XSTR (XEXP (DECL_RTL (DECL), 0), 0)[0]                        \
 167           == SDATA_NAME_FLAG_CHAR)                                      \
 168         sdata_section ();                                               \
 169       /* ??? We need the extra ! RELOC check, because the default is to \
 170          only check RELOC if flag_pic is set, and we don't set flag_pic \
 171          (yet?).  */                                                    \
 172       else if (DECL_READONLY_SECTION (DECL, RELOC) && ! (RELOC))        \
 173         const_section ();                                               \
 174       else                                                              \
 175         data_section ();                                                \
 176     }                                                                   \
 177   /* This could be a CONSTRUCTOR containing ADDR_EXPR of a VAR_DECL,    \
 178      in which case we can't put it in a shared library rodata.  */      \
 179   else if (RELOC)                                                       \
 180     data_section ();                                                    \
 181   else                                                                  \
 182     const_section ();                                                   \
 183 }
 184
 185 /* Similarly for constant pool data.  */
 186
 187 extern unsigned int ia64_section_threshold;
 188 #undef SELECT_RTX_SECTION
 189 #define SELECT_RTX_SECTION(MODE, RTX, ALIGN)                            \
 190 {                                                                       \
 191   if (GET_MODE_SIZE (MODE) > 0                                          \
 192       && GET_MODE_SIZE (MODE) <= ia64_section_threshold)                \
 193     sdata_section ();                                                   \
 194   else if (symbolic_operand ((RTX), (MODE)))                            \
 195     data_section ();                                                    \
 196   else                                                                  \
 197     const_section ();                                                   \
 198 }
 199
 200 #undef UNIQUE_SECTION
 201 #define UNIQUE_SECTION(DECL, RELOC)                             \
 202   do                                                            \
 203     {                                                           \
 204       int len;                                                  \
 205       int sec;                                                  \
 206       const char *name;                                         \
 207       char *string;                                             \
 208       const char *prefix;                                       \
 209       static const char *const prefixes[/*4*/3][2] =            \
 210       {                                                         \
 211         { ".text.",   ".gnu.linkonce.t." },                     \
 212         { ".rodata.", ".gnu.linkonce.r." },                     \
 213         { ".data.",   ".gnu.linkonce.d." }                      \
 214         /* Do not generate unique sections for uninitialised    \
 215            data since we do not have support for this in the    \
 216            linker scripts yet...                                \
 217         ,{ ".bss.",    ".gnu.linkonce.b." }  */                 \
 218       };                                                        \
 219                                                                 \
 220       if (TREE_CODE (DECL) == FUNCTION_DECL)                    \
 221         sec = 0;                                                \
 222   /*  else if (DECL_INITIAL (DECL) == 0                         \
 223                || DECL_INITIAL (DECL) == error_mark_node)       \
 224         sec =  3; */                                            \
 225       else if (DECL_READONLY_SECTION (DECL, RELOC) && ! (RELOC))\
 226         sec = 1;                                                \
 227       else                                                      \
 228         sec = 2;                                                \
 229                                                                 \
 230       name   = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
 231       /* Strip off any encoding in name.  */                    \
 232       STRIP_NAME_ENCODING (name, name);                         \
 233       prefix = prefixes[sec][DECL_ONE_ONLY(DECL)];              \
 234       len    = strlen (name) + strlen (prefix);                 \
 235       string = alloca (len + 1);                                \
 236                                                                 \
 237       sprintf (string, "%s%s", prefix, name);                   \
 238                                                                 \
 239       DECL_SECTION_NAME (DECL) = build_string (len, string);    \
 240     }                                                           \
 241   while (0)
 242
 243 /* Override ia64/sysv4.h setting with that used by AIX5.  */
 244 #undef WCHAR_TYPE
 245 #ifdef __64BIT__
 246 #define WCHAR_TYPE "unsigned int"
 247 #else
 248 #define WCHAR_TYPE "unsigned short"
 249 #endif
 250
 251 /* Define the `__builtin_va_list' type for AIX.  Use char* b/c that's what the
 252    system headers expect.  */
 253 #define BUILD_VA_LIST_TYPE(VALIST) \
 254   (VALIST) = build_pointer_type(char_type_node)
 255
 256 /* End of aix.h */