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, 2007 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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* We use stabs-in-elf for debugging, because that is what the native
  22    toolchain uses.  */
  23 #undef PREFERRED_DEBUGGING_TYPE
  24 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  25
  26 /* Solaris 2 (at least as of 2.5.1) uses a 32-bit wchar_t.  */
  27 #undef WCHAR_TYPE
  28 #define WCHAR_TYPE "long int"
  29
  30 #undef WCHAR_TYPE_SIZE
  31 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  32
  33 /* Solaris 2 uses a wint_t different from the default. This is required
  34    by the SCD 2.4.1, p. 6-83, Figure 6-66.  */
  35 #undef  WINT_TYPE
  36 #define WINT_TYPE "long int"
  37
  38 #undef  WINT_TYPE_SIZE
  39 #define WINT_TYPE_SIZE BITS_PER_WORD
  40
  41 #define TARGET_HANDLE_PRAGMA_REDEFINE_EXTNAME 1
  42
  43 /* ??? Note: in order for -compat-bsd to work fully,
  44    we must somehow arrange to fixincludes /usr/ucbinclude
  45    and put the result in $(libsubdir)/ucbinclude.  */
  46
  47 #undef CPP_SUBTARGET_SPEC
  48 #define CPP_SUBTARGET_SPEC "\
  49 %{pthreads|pthread:-D_REENTRANT -D_PTHREADS} \
  50 %{!pthreads:%{!pthread:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}}} \
  51 %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
  52 "
  53
  54 /* Names to predefine in the preprocessor for this target machine.  */
  55 #define TARGET_SUB_OS_CPP_BUILTINS()
  56 #define TARGET_OS_CPP_BUILTINS()                        \
  57     do {                                                \
  58         builtin_define_std ("unix");                    \
  59         builtin_define_std ("sun");                     \
  60         builtin_define ("__svr4__");                    \
  61         builtin_define ("__SVR4");                      \
  62         builtin_assert ("system=unix");                 \
  63         builtin_assert ("system=svr4");                 \
  64         /* For C++ we need to add some additional macro \
  65            definitions required by the C++ standard     \
  66            library.  */                                 \
  67         if (c_dialect_cxx ())                           \
  68           {                                             \
  69             builtin_define ("_XOPEN_SOURCE=500");       \
  70             builtin_define ("_LARGEFILE_SOURCE=1");     \
  71             builtin_define ("_LARGEFILE64_SOURCE=1");   \
  72             builtin_define ("__EXTENSIONS__");          \
  73           }                                             \
  74         TARGET_SUB_OS_CPP_BUILTINS();                   \
  75     } while (0)
  76
  77 /* The system headers under Solaris 2 are C++-aware since 2.0.  */
  78 #define NO_IMPLICIT_EXTERN_C
  79
  80 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
  81    It's safe to pass -s always, even if -g is not used.  */
  82 #undef ASM_SPEC
  83 #define ASM_SPEC "\
  84 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
  85 %{fpic|fpie|fPIC|fPIE:-K PIC} \
  86 %(asm_cpu) \
  87 "
  88
  89 /* We don't use the standard LIB_SPEC only because we don't yet support c++.  */
  90 #undef LIB_SPEC
  91 #define LIB_SPEC \
  92   "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
  93    %{!shared:\
  94      %{!symbolic:\
  95        %{pthreads|pthread:-lpthread} \
  96        %{!pthreads:%{!pthread:%{threads:-lthread}}} \
  97        %{p|pg:-ldl} -lc}}"
  98
  99 #undef  ENDFILE_SPEC
 100 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 101
 102 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
 103 #undef STARTFILE_SPEC
 104 #define STARTFILE_SPEC "%{!shared: \
 105                          %{!symbolic: \
 106                           %{p:mcrt1.o%s} \
 107                           %{!p: \
 108                             %{pg:gcrt1.o%s gmon.o%s} \
 109                             %{!pg:crt1.o%s}}}} \
 110                         crti.o%s %(startfile_arch) \
 111                         crtbegin.o%s"
 112
 113 #undef STARTFILE_ARCH32_SPEC
 114 #define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
 115                             %{!ansi:values-Xa.o%s}"
 116
 117 #undef STARTFILE_ARCH_SPEC
 118 #define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
 119
 120 #undef LINK_ARCH32_SPEC_BASE
 121 #define LINK_ARCH32_SPEC_BASE \
 122   "%{G:-G} \
 123    %{YP,*} \
 124    %{R*} \
 125    %{compat-bsd: \
 126      %{!YP,*:%{p|pg:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 127              %{!p:%{!pg:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}}} \
 128              -R /usr/ucblib} \
 129    %{!compat-bsd: \
 130      %{!YP,*:%{p|pg:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 131              %{!p:%{!pg:-Y P,/usr/ccs/lib:/usr/lib}}}}"
 132
 133 #undef LINK_ARCH32_SPEC
 134 #define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
 135
 136 #undef LINK_ARCH_SPEC
 137 #define LINK_ARCH_SPEC LINK_ARCH32_SPEC
 138
 139 /* This should be the same as in svr4.h, except with -R added.  */
 140 #undef  LINK_SPEC
 141 #define LINK_SPEC \
 142   "%{h*} %{v:-V} \
 143    %{b} \
 144    %{static:-dn -Bstatic} \
 145    %{shared:-G -dy %{!mimpure-text:-z text}} \
 146    %{symbolic:-Bsymbolic -G -dy -z text} \
 147    %(link_arch) \
 148    %{Qy:} %{!Qn:-Qy}"
 149
 150 /* The Solaris linker doesn't understand constructor priorities.  (The
 151    GNU linker does support constructor priorities, so GNU ld
 152    configuration files for Solaris override this setting.)  */
 153 #undef SUPPORTS_INIT_PRIORITY
 154 #define SUPPORTS_INIT_PRIORITY 0
 155
 156 /* This defines which switch letters take arguments.
 157    It is as in svr4.h but with -R added.  */
 158 #undef SWITCH_TAKES_ARG
 159 #define SWITCH_TAKES_ARG(CHAR) \
 160   (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
 161    || (CHAR) == 'R' \
 162    || (CHAR) == 'h' \
 163    || (CHAR) == 'z')
 164
 165 #define STDC_0_IN_SYSTEM_HEADERS 1
 166 \f
 167 /*
 168  * Attempt to turn on access permissions for the stack.
 169  *
 170  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 171  * to run always.  2.6 can change the stack protection but has no way to
 172  * query it.
 173  *
 174  */
 175
 176 /* sys/mman.h is not present on some non-Solaris configurations
 177    that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
 178    number instead of the appropriate PROT_* flags.  */
 179
 180 #define ENABLE_EXECUTE_STACK                                    \
 181                                                                         \
 182 /* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */       \
 183                                                                         \
 184 static int need_enable_exec_stack;                                      \
 185                                                                         \
 186 static void check_enabling(void) __attribute__ ((constructor));         \
 187 static void check_enabling(void)                                        \
 188 {                                                                       \
 189   extern long sysconf(int);                                             \
 190                                                                         \
 191   int prot = (int) sysconf(515 /* _SC_STACK_PROT */);                   \
 192   if (prot != 7 /* STACK_PROT_RWX */)                                   \
 193     need_enable_exec_stack = 1;                                         \
 194 }                                                                       \
 195                                                                         \
 196 extern void __enable_execute_stack (void *);                            \
 197 void                                                                    \
 198 __enable_execute_stack (void *addr)                                     \
 199 {                                                                       \
 200   extern int mprotect(void *, size_t, int);                             \
 201   if (!need_enable_exec_stack)                                          \
 202     return;                                                             \
 203   else {                                                                \
 204     long size = getpagesize ();                                         \
 205     long mask = ~(size-1);                                              \
 206     char *page = (char *) (((long) addr) & mask);                       \
 207     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
 208                                                                         \
 209     if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)        \
 210       perror ("mprotect of trampoline code");                           \
 211   }                                                                     \
 212 }
 213
 214 /* Support Solaris-specific format checking for cmn_err.  */
 215 #define TARGET_N_FORMAT_TYPES 1
 216 #define TARGET_FORMAT_TYPES solaris_format_types
 217
 218 /* #pragma init and #pragma fini are implemented on top of init and
 219    fini attributes.  */
 220 #define SOLARIS_ATTRIBUTE_TABLE                                         \
 221   { "init",      0, 0, true,  false,  false, NULL },                    \
 222   { "fini",      0, 0, true,  false,  false, NULL }
 223
 224 /* This is how to declare the size of a function.  For Solaris, we output
 225    any .init or .fini entries here.  */
 226 #undef ASM_DECLARE_FUNCTION_SIZE
 227 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 228   do                                                            \
 229     {                                                           \
 230       if (!flag_inhibit_size_directive)                         \
 231         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 232       solaris_output_init_fini (FILE, DECL);                    \
 233     }                                                           \
 234   while (0)
 235
 236 /* Register the Solaris-specific #pragma directives.  */
 237 #define REGISTER_TARGET_PRAGMAS() solaris_register_pragmas ()
 238
 239 extern GTY(()) tree solaris_pending_aligns;
 240 extern GTY(()) tree solaris_pending_inits;
 241 extern GTY(()) tree solaris_pending_finis;
 242
 243 /* Allow macro expansion in #pragma pack.  */
 244 #define HANDLE_PRAGMA_PACK_WITH_EXPANSION