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, 2008, 2009 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 SIG_ATOMIC_TYPE "int"
  42
  43 /* ??? This definition of int8_t follows the system header but does
  44    not conform to C99.  Likewise int_fast8_t, int_least8_t.  */
  45 #define INT8_TYPE "char"
  46 #define INT16_TYPE "short int"
  47 #define INT32_TYPE "int"
  48 #define INT64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
  49 #define UINT8_TYPE "unsigned char"
  50 #define UINT16_TYPE "short unsigned int"
  51 #define UINT32_TYPE "unsigned int"
  52 #define UINT64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
  53
  54 #define INT_LEAST8_TYPE "char"
  55 #define INT_LEAST16_TYPE "short int"
  56 #define INT_LEAST32_TYPE "int"
  57 #define INT_LEAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
  58 #define UINT_LEAST8_TYPE "unsigned char"
  59 #define UINT_LEAST16_TYPE "short unsigned int"
  60 #define UINT_LEAST32_TYPE "unsigned int"
  61 #define UINT_LEAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
  62
  63 #define INT_FAST8_TYPE "char"
  64 #define INT_FAST16_TYPE "int"
  65 #define INT_FAST32_TYPE "int"
  66 #define INT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
  67 #define UINT_FAST8_TYPE "unsigned char"
  68 #define UINT_FAST16_TYPE "unsigned int"
  69 #define UINT_FAST32_TYPE "unsigned int"
  70 #define UINT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
  71
  72 #define INTPTR_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "int")
  73 #define UINTPTR_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "unsigned int")
  74
  75 #define TARGET_HANDLE_PRAGMA_REDEFINE_EXTNAME 1
  76
  77 /* ??? Note: in order for -compat-bsd to work fully,
  78    we must somehow arrange to fixincludes /usr/ucbinclude
  79    and put the result in $(libsubdir)/ucbinclude.  */
  80
  81 #undef CPP_SUBTARGET_SPEC
  82 #define CPP_SUBTARGET_SPEC "\
  83 %{pthreads|pthread:-D_REENTRANT -D_PTHREADS} \
  84 %{!pthreads:%{!pthread:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}}} \
  85 %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
  86 "
  87
  88 /* Names to predefine in the preprocessor for this target machine.  */
  89 #define TARGET_SUB_OS_CPP_BUILTINS()
  90 #define TARGET_OS_CPP_BUILTINS()                        \
  91     do {                                                \
  92         builtin_define_std ("unix");                    \
  93         builtin_define_std ("sun");                     \
  94         builtin_define ("__svr4__");                    \
  95         builtin_define ("__SVR4");                      \
  96         builtin_assert ("system=unix");                 \
  97         builtin_assert ("system=svr4");                 \
  98         /* For C++ we need to add some additional macro \
  99            definitions required by the C++ standard     \
 100            library.  */                                 \
 101         if (c_dialect_cxx ())                           \
 102           {                                             \
 103             builtin_define ("_XOPEN_SOURCE=500");       \
 104             builtin_define ("_LARGEFILE_SOURCE=1");     \
 105             builtin_define ("_LARGEFILE64_SOURCE=1");   \
 106             builtin_define ("__EXTENSIONS__");          \
 107           }                                             \
 108         TARGET_SUB_OS_CPP_BUILTINS();                   \
 109     } while (0)
 110
 111 /* The system headers under Solaris 2 are C++-aware since 2.0.  */
 112 #define NO_IMPLICIT_EXTERN_C
 113
 114 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 115    It's safe to pass -s always, even if -g is not used.  */
 116 #undef ASM_SPEC
 117 #define ASM_SPEC "\
 118 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 119 %{fpic|fpie|fPIC|fPIE:-K PIC} \
 120 %(asm_cpu) \
 121 "
 122
 123 /* We don't use the standard LIB_SPEC only because we don't yet support c++.  */
 124 #undef LIB_SPEC
 125 #define LIB_SPEC \
 126   "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
 127    %{!shared:\
 128      %{!symbolic:\
 129        %{pthreads|pthread:-lpthread} \
 130        %{!pthreads:%{!pthread:%{threads:-lthread}}} \
 131        %{p|pg:-ldl} -lc}}"
 132
 133 #undef  ENDFILE_SPEC
 134 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 135
 136 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
 137 #undef STARTFILE_SPEC
 138 #define STARTFILE_SPEC "%{!shared: \
 139                          %{!symbolic: \
 140                           %{p:mcrt1.o%s} \
 141                           %{!p: \
 142                             %{pg:gcrt1.o%s gmon.o%s} \
 143                             %{!pg:crt1.o%s}}}} \
 144                         crti.o%s %(startfile_arch) \
 145                         crtbegin.o%s"
 146
 147 #undef STARTFILE_ARCH32_SPEC
 148 #define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
 149                             %{!ansi:values-Xa.o%s}"
 150
 151 #undef STARTFILE_ARCH_SPEC
 152 #define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
 153
 154 #undef LINK_ARCH32_SPEC_BASE
 155 #define LINK_ARCH32_SPEC_BASE \
 156   "%{G:-G} \
 157    %{YP,*} \
 158    %{R*} \
 159    %{compat-bsd: \
 160      %{!YP,*:%{p|pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
 161              %{!p:%{!pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib:%R/usr/lib}}} \
 162              -R %R/usr/ucblib} \
 163    %{!compat-bsd: \
 164      %{!YP,*:%{p|pg:-Y P,%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
 165              %{!p:%{!pg:-Y P,%R/usr/ccs/lib:%R/usr/lib}}}}"
 166
 167 #undef LINK_ARCH32_SPEC
 168 #define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
 169
 170 #undef LINK_ARCH_SPEC
 171 #define LINK_ARCH_SPEC LINK_ARCH32_SPEC
 172
 173 /* This should be the same as in svr4.h, except with -R added.  */
 174 #undef  LINK_SPEC
 175 #define LINK_SPEC \
 176   "%{h*} %{v:-V} \
 177    %{b} \
 178    %{static:-dn -Bstatic} \
 179    %{shared:-G -dy %{!mimpure-text:-z text}} \
 180    %{symbolic:-Bsymbolic -G -dy -z text} \
 181    %(link_arch) \
 182    %{Qy:} %{!Qn:-Qy}"
 183
 184 /* The Solaris linker doesn't understand constructor priorities.  (The
 185    GNU linker does support constructor priorities, so GNU ld
 186    configuration files for Solaris override this setting.)  */
 187 #undef SUPPORTS_INIT_PRIORITY
 188 #define SUPPORTS_INIT_PRIORITY 0
 189
 190 /* This defines which switch letters take arguments.
 191    It is as in svr4.h but with -R added.  */
 192 #undef SWITCH_TAKES_ARG
 193 #define SWITCH_TAKES_ARG(CHAR) \
 194   (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
 195    || (CHAR) == 'R' \
 196    || (CHAR) == 'h' \
 197    || (CHAR) == 'z')
 198
 199 #define STDC_0_IN_SYSTEM_HEADERS 1
 200 \f
 201 /*
 202  * Attempt to turn on access permissions for the stack.
 203  *
 204  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 205  * to run always.  2.6 can change the stack protection but has no way to
 206  * query it.
 207  *
 208  */
 209
 210 /* sys/mman.h is not present on some non-Solaris configurations
 211    that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
 212    number instead of the appropriate PROT_* flags.  */
 213
 214 #define ENABLE_EXECUTE_STACK                                    \
 215                                                                         \
 216 /* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */       \
 217                                                                         \
 218 static int need_enable_exec_stack;                                      \
 219                                                                         \
 220 static void check_enabling(void) __attribute__ ((constructor));         \
 221 static void check_enabling(void)                                        \
 222 {                                                                       \
 223   extern long sysconf(int);                                             \
 224                                                                         \
 225   int prot = (int) sysconf(515 /* _SC_STACK_PROT */);                   \
 226   if (prot != 7 /* STACK_PROT_RWX */)                                   \
 227     need_enable_exec_stack = 1;                                         \
 228 }                                                                       \
 229                                                                         \
 230 extern void __enable_execute_stack (void *);                            \
 231 void                                                                    \
 232 __enable_execute_stack (void *addr)                                     \
 233 {                                                                       \
 234   extern int mprotect(void *, size_t, int);                             \
 235   if (!need_enable_exec_stack)                                          \
 236     return;                                                             \
 237   else {                                                                \
 238     long size = getpagesize ();                                         \
 239     long mask = ~(size-1);                                              \
 240     char *page = (char *) (((long) addr) & mask);                       \
 241     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
 242                                                                         \
 243     if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)        \
 244       perror ("mprotect of trampoline code");                           \
 245   }                                                                     \
 246 }
 247
 248 /* Support Solaris-specific format checking for cmn_err.  */
 249 #define TARGET_N_FORMAT_TYPES 1
 250 #define TARGET_FORMAT_TYPES solaris_format_types
 251
 252 /* #pragma init and #pragma fini are implemented on top of init and
 253    fini attributes.  */
 254 #define SOLARIS_ATTRIBUTE_TABLE                                         \
 255   { "init",      0, 0, true,  false,  false, NULL },                    \
 256   { "fini",      0, 0, true,  false,  false, NULL }
 257
 258 /* This is how to declare the size of a function.  For Solaris, we output
 259    any .init or .fini entries here.  */
 260 #undef ASM_DECLARE_FUNCTION_SIZE
 261 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 262   do                                                            \
 263     {                                                           \
 264       if (!flag_inhibit_size_directive)                         \
 265         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 266       solaris_output_init_fini (FILE, DECL);                    \
 267     }                                                           \
 268   while (0)
 269
 270 extern GTY(()) tree solaris_pending_aligns;
 271 extern GTY(()) tree solaris_pending_inits;
 272 extern GTY(()) tree solaris_pending_finis;
 273
 274 /* Allow macro expansion in #pragma pack.  */
 275 #define HANDLE_PRAGMA_PACK_WITH_EXPANSION