gcc/config/sol2.h

   1 /* Operating system specific defines to be used when targeting GCC for any
   2    Solaris 2 system.
   3    Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 GCC 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 GCC; 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 /* We use stabs-in-elf for debugging, because that is what the native
  23    toolchain uses.  */
  24 #undef PREFERRED_DEBUGGING_TYPE
  25 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  26
  27 /* Solaris 2 (at least as of 2.5.1) uses a 32-bit wchar_t.  */
  28 #undef WCHAR_TYPE
  29 #define WCHAR_TYPE "long int"
  30
  31 #undef WCHAR_TYPE_SIZE
  32 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  33
  34 /* Solaris 2 uses a wint_t different from the default. This is required
  35    by the SCD 2.4.1, p. 6-83, Figure 6-66.  */
  36 #undef  WINT_TYPE
  37 #define WINT_TYPE "long int"
  38
  39 #undef  WINT_TYPE_SIZE
  40 #define WINT_TYPE_SIZE BITS_PER_WORD
  41
  42 #define TARGET_HANDLE_PRAGMA_REDEFINE_EXTNAME 1
  43
  44 /* ??? Note: in order for -compat-bsd to work fully,
  45    we must somehow arrange to fixincludes /usr/ucbinclude
  46    and put the result in $(libsubdir)/ucbinclude.  */
  47
  48 #undef CPP_SUBTARGET_SPEC
  49 #define CPP_SUBTARGET_SPEC "\
  50 %{pthreads:-D_REENTRANT -D_PTHREADS} \
  51 %{!pthreads:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}} \
  52 %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
  53 "
  54
  55 /* Names to predefine in the preprocessor for this target machine.  */
  56 #define TARGET_SUB_OS_CPP_BUILTINS()
  57 #define TARGET_OS_CPP_BUILTINS()                        \
  58     do {                                                \
  59         builtin_define_std ("unix");                    \
  60         builtin_define_std ("sun");                     \
  61         builtin_define ("__svr4__");                    \
  62         builtin_define ("__SVR4");                      \
  63         builtin_assert ("system=unix");                 \
  64         builtin_assert ("system=svr4");                 \
  65         /* For C++ we need to add some additional macro \
  66            definitions required by the C++ standard     \
  67            library.  */                                 \
  68         if (c_dialect_cxx ())                           \
  69           {                                             \
  70             builtin_define ("_XOPEN_SOURCE=500");       \
  71             builtin_define ("_LARGEFILE_SOURCE=1");     \
  72             builtin_define ("_LARGEFILE64_SOURCE=1");   \
  73             builtin_define ("__EXTENSIONS__");          \
  74           }                                             \
  75         if (flag_pic)                                   \
  76           {                                             \
  77             builtin_define ("__PIC__");                 \
  78             builtin_define ("__pic__");                 \
  79           }                                             \
  80         TARGET_SUB_OS_CPP_BUILTINS();                   \
  81     } while (0)
  82
  83 /* The system headers under Solaris 2 are C++-aware since 2.0.  */
  84 #define NO_IMPLICIT_EXTERN_C
  85
  86 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
  87    It's safe to pass -s always, even if -g is not used.  */
  88 #undef ASM_SPEC
  89 #define ASM_SPEC "\
  90 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
  91 %{fpic|fpie|fPIC|fPIE:-K PIC} \
  92 %(asm_cpu) \
  93 "
  94
  95 /* We don't use the standard LIB_SPEC only because we don't yet support c++.  */
  96 #undef LIB_SPEC
  97 #define LIB_SPEC \
  98   "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
  99    %{!shared:\
 100      %{!symbolic:\
 101        %{pthreads:-lpthread} \
 102        %{!pthreads:%{threads:-lthread}} \
 103        %{p|pg:-ldl} -lc}}"
 104
 105 #undef  ENDFILE_SPEC
 106 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 107
 108 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
 109 #undef STARTFILE_SPEC
 110 #define STARTFILE_SPEC "%{!shared: \
 111                          %{!symbolic: \
 112                           %{p:mcrt1.o%s} \
 113                           %{!p: \
 114                             %{pg:gcrt1.o%s gmon.o%s} \
 115                             %{!pg:crt1.o%s}}}} \
 116                         crti.o%s %(startfile_arch) \
 117                         crtbegin.o%s"
 118
 119 #undef STARTFILE_ARCH32_SPEC
 120 #define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
 121                             %{!ansi:values-Xa.o%s}"
 122
 123 #undef STARTFILE_ARCH_SPEC
 124 #define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
 125
 126 #undef LINK_ARCH32_SPEC_BASE
 127 #define LINK_ARCH32_SPEC_BASE \
 128   "%{G:-G} \
 129    %{YP,*} \
 130    %{R*} \
 131    %{compat-bsd: \
 132      %{!YP,*:%{p|pg:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 133              %{!p:%{!pg:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}}} \
 134              -R /usr/ucblib} \
 135    %{!compat-bsd: \
 136      %{!YP,*:%{p|pg:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 137              %{!p:%{!pg:-Y P,/usr/ccs/lib:/usr/lib}}}}"
 138
 139 #undef LINK_ARCH32_SPEC
 140 #define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
 141
 142 #undef LINK_ARCH_SPEC
 143 #define LINK_ARCH_SPEC LINK_ARCH32_SPEC
 144
 145 /* This should be the same as in svr4.h, except with -R added.  */
 146 #undef  LINK_SPEC
 147 #define LINK_SPEC \
 148   "%{h*} %{v:-V} \
 149    %{b} %{Wl,*:%*} \
 150    %{static:-dn -Bstatic} \
 151    %{shared:-G -dy %{!mimpure-text:-z text}} \
 152    %{symbolic:-Bsymbolic -G -dy -z text} \
 153    %(link_arch) \
 154    %{Qy:} %{!Qn:-Qy}"
 155
 156 /* The Solaris linker doesn't understand constructor priorities.  (The
 157    GNU linker does support constructor priorities, so GNU ld
 158    configuration files for Solaris override this setting.)  */
 159 #undef SUPPORTS_INIT_PRIORITY
 160 #define SUPPORTS_INIT_PRIORITY 0
 161
 162 /* This defines which switch letters take arguments.
 163    It is as in svr4.h but with -R added.  */
 164 #undef SWITCH_TAKES_ARG
 165 #define SWITCH_TAKES_ARG(CHAR) \
 166   (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
 167    || (CHAR) == 'R' \
 168    || (CHAR) == 'h' \
 169    || (CHAR) == 'z')
 170
 171 #define STDC_0_IN_SYSTEM_HEADERS 1
 172 \f
 173 /*
 174  * Attempt to turn on access permissions for the stack.
 175  *
 176  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 177  * to run always.  2.6 can change the stack protection but has no way to
 178  * query it.
 179  *
 180  */
 181
 182 /* sys/mman.h is not present on some non-Solaris configurations
 183    that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
 184    number instead of the appropriate PROT_* flags.  */
 185
 186 #define ENABLE_EXECUTE_STACK                                    \
 187                                                                         \
 188 /* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */       \
 189                                                                         \
 190 static int need_enable_exec_stack;                                      \
 191                                                                         \
 192 static void check_enabling(void) __attribute__ ((constructor));         \
 193 static void check_enabling(void)                                        \
 194 {                                                                       \
 195   extern long sysconf(int);                                             \
 196                                                                         \
 197   int prot = (int) sysconf(515 /* _SC_STACK_PROT */);                   \
 198   if (prot != 7 /* STACK_PROT_RWX */)                                   \
 199     need_enable_exec_stack = 1;                                         \
 200 }                                                                       \
 201                                                                         \
 202 extern void __enable_execute_stack (void *);                            \
 203 void                                                                    \
 204 __enable_execute_stack (void *addr)                                     \
 205 {                                                                       \
 206   extern int mprotect(void *, size_t, int);                             \
 207   if (!need_enable_exec_stack)                                          \
 208     return;                                                             \
 209   else {                                                                \
 210     long size = getpagesize ();                                         \
 211     long mask = ~(size-1);                                              \
 212     char *page = (char *) (((long) addr) & mask);                       \
 213     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
 214                                                                         \
 215     if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)        \
 216       perror ("mprotect of trampoline code");                           \
 217   }                                                                     \
 218 }
 219
 220 /* Support Solaris-specific format checking for cmn_err.  */
 221 #define TARGET_N_FORMAT_TYPES 1
 222 #define TARGET_FORMAT_TYPES solaris_format_types
 223
 224 /* #pragma init and #pragma fini are implemented on top of init and
 225    fini attributes.  */
 226 #define SOLARIS_ATTRIBUTE_TABLE                                         \
 227   { "init",      0, 0, true,  false,  false, NULL },                    \
 228   { "fini",      0, 0, true,  false,  false, NULL }
 229
 230 /* This is how to declare the size of a function.  For Solaris, we output
 231    any .init or .fini entries here.  */
 232 #undef ASM_DECLARE_FUNCTION_SIZE
 233 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 234   do                                                            \
 235     {                                                           \
 236       if (!flag_inhibit_size_directive)                         \
 237         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 238       solaris_output_init_fini (FILE, DECL);                    \
 239     }                                                           \
 240   while (0)
 241
 242 /* Register the Solaris-specific #pragma directives.  */
 243 #define REGISTER_TARGET_PRAGMAS() solaris_register_pragmas ()
 244
 245 extern GTY(()) tree solaris_pending_aligns;
 246 extern GTY(()) tree solaris_pending_inits;
 247 extern GTY(()) tree solaris_pending_finis;
 248
 249 /* Allow macro expansion in #pragma pack.  */
 250 #define HANDLE_PRAGMA_PACK_WITH_EXPANSION