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, 2010, 2011
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  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 SIG_ATOMIC_TYPE "int"
  43
  44 /* ??? This definition of int8_t follows the system header but does
  45    not conform to C99.  Likewise int_fast8_t, int_least8_t.  */
  46 #define INT8_TYPE "char"
  47 #define INT16_TYPE "short int"
  48 #define INT32_TYPE "int"
  49 #define INT64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
  50 #define UINT8_TYPE "unsigned char"
  51 #define UINT16_TYPE "short unsigned int"
  52 #define UINT32_TYPE "unsigned int"
  53 #define UINT64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
  54
  55 #define INT_LEAST8_TYPE "char"
  56 #define INT_LEAST16_TYPE "short int"
  57 #define INT_LEAST32_TYPE "int"
  58 #define INT_LEAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
  59 #define UINT_LEAST8_TYPE "unsigned char"
  60 #define UINT_LEAST16_TYPE "short unsigned int"
  61 #define UINT_LEAST32_TYPE "unsigned int"
  62 #define UINT_LEAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
  63
  64 #define INT_FAST8_TYPE "char"
  65 #define INT_FAST16_TYPE "int"
  66 #define INT_FAST32_TYPE "int"
  67 #define INT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
  68 #define UINT_FAST8_TYPE "unsigned char"
  69 #define UINT_FAST16_TYPE "unsigned int"
  70 #define UINT_FAST32_TYPE "unsigned int"
  71 #define UINT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
  72
  73 #define INTPTR_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "int")
  74 #define UINTPTR_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "unsigned int")
  75
  76 /* ??? Note: in order for -compat-bsd to work fully,
  77    we must somehow arrange to fixincludes /usr/ucbinclude
  78    and put the result in $(libsubdir)/ucbinclude.  */
  79
  80 #undef CPP_SUBTARGET_SPEC
  81 #define CPP_SUBTARGET_SPEC "\
  82 %{pthreads|pthread:-D_REENTRANT -D_PTHREADS} \
  83 %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
  84 "
  85
  86 /* Names to predefine in the preprocessor for this target machine.  */
  87 #define TARGET_SUB_OS_CPP_BUILTINS()
  88 #define TARGET_OS_CPP_BUILTINS()                        \
  89     do {                                                \
  90         builtin_define_std ("unix");                    \
  91         builtin_define_std ("sun");                     \
  92         builtin_define ("__svr4__");                    \
  93         builtin_define ("__SVR4");                      \
  94         builtin_assert ("system=unix");                 \
  95         builtin_assert ("system=svr4");                 \
  96         /* For C++ we need to add some additional macro \
  97            definitions required by the C++ standard     \
  98            library.  */                                 \
  99         if (c_dialect_cxx ())                           \
 100           {                                             \
 101             builtin_define ("__STDC_VERSION__=199901L");\
 102             builtin_define ("_XOPEN_SOURCE=600");       \
 103             builtin_define ("_LARGEFILE_SOURCE=1");     \
 104             builtin_define ("_LARGEFILE64_SOURCE=1");   \
 105             builtin_define ("__EXTENSIONS__");          \
 106           }                                             \
 107         TARGET_SUB_OS_CPP_BUILTINS();                   \
 108     } while (0)
 109
 110 /* The system headers under Solaris 2 are C++-aware since 2.0.  */
 111 #define NO_IMPLICIT_EXTERN_C
 112
 113 /* It's safe to pass -s always, even if -g is not used.  */
 114 #undef ASM_SPEC
 115 #define ASM_SPEC "\
 116 %{v:-V} %{Qy:} %{!Qn:-Qy} %{Ym,*} -s \
 117 %{fpic|fpie|fPIC|fPIE:-K PIC} \
 118 %(asm_cpu) \
 119 "
 120
 121 #ifndef CROSS_DIRECTORY_STRUCTURE
 122 #undef MD_EXEC_PREFIX
 123 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
 124
 125 #undef MD_STARTFILE_PREFIX
 126 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
 127 #endif
 128
 129 /* We don't use the standard LIB_SPEC only because we don't yet support c++.  */
 130 #undef LIB_SPEC
 131 #define LIB_SPEC \
 132   "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
 133    %{!symbolic:\
 134      %{pthreads|pthread:" \
 135         LIB_THREAD_LDFLAGS_SPEC " -lpthread " LIB_TLS_SPEC "} \
 136      %{p|pg:-ldl} -lc}"
 137
 138 #undef  ENDFILE_SPEC
 139 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 140
 141 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
 142 #undef STARTFILE_SPEC
 143 #define STARTFILE_SPEC "%{!shared: \
 144                          %{!symbolic: \
 145                           %{p:mcrt1.o%s} \
 146                           %{!p: \
 147                             %{pg:gcrt1.o%s gmon.o%s} \
 148                             %{!pg:crt1.o%s}}}} \
 149                         crti.o%s %(startfile_arch) \
 150                         crtbegin.o%s"
 151
 152 #undef STARTFILE_ARCH32_SPEC
 153 #define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
 154                             %{!ansi:values-Xa.o%s}"
 155
 156 #undef STARTFILE_ARCH_SPEC
 157 #define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
 158
 159 #undef LINK_ARCH32_SPEC_BASE
 160 #define LINK_ARCH32_SPEC_BASE \
 161   "%{G:-G} \
 162    %{YP,*} \
 163    %{R*} \
 164    %{compat-bsd: \
 165      %{!YP,*:%{p|pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
 166              %{!p:%{!pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib:%R/usr/lib}}} \
 167              -R %R/usr/ucblib} \
 168    %{!compat-bsd: \
 169      %{!YP,*:%{p|pg:-Y P,%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
 170              %{!p:%{!pg:-Y P,%R/usr/ccs/lib:%R/usr/lib}}}}"
 171
 172 #undef LINK_ARCH32_SPEC
 173 #define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
 174
 175 #undef LINK_ARCH_SPEC
 176 #define LINK_ARCH_SPEC LINK_ARCH32_SPEC
 177
 178 #undef  LINK_SPEC
 179 #define LINK_SPEC \
 180   "%{h*} %{v:-V} \
 181    %{!shared:%{!static:%{rdynamic: " RDYNAMIC_SPEC "}}} \
 182    %{static:-dn -Bstatic} \
 183    %{shared:-G -dy %{!mimpure-text:-z text}} \
 184    %{symbolic:-Bsymbolic -G -dy -z text} \
 185    %(link_arch) \
 186    %{Qy:} %{!Qn:-Qy}"
 187
 188 /* With Sun ld, -rdynamic is a no-op.  */
 189 #define RDYNAMIC_SPEC ""
 190
 191 /* The Solaris linker doesn't understand constructor priorities.  (The
 192    GNU linker does support constructor priorities, so GNU ld
 193    configuration files for Solaris override this setting.)  */
 194 #undef SUPPORTS_INIT_PRIORITY
 195 #define SUPPORTS_INIT_PRIORITY 0
 196
 197 /* collect2.c can only parse GNU nm -n output.  Solaris nm needs -png to
 198    produce the same format.  */
 199 #define NM_FLAGS "-png"
 200
 201 #define STDC_0_IN_SYSTEM_HEADERS 1
 202 \f
 203 /*
 204  * Attempt to turn on access permissions for the stack.
 205  *
 206  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 207  * to run always.  2.6 can change the stack protection but has no way to
 208  * query it.
 209  *
 210  */
 211
 212 /* sys/mman.h is not present on some non-Solaris configurations
 213    that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
 214    number instead of the appropriate PROT_* flags.  */
 215
 216 #define ENABLE_EXECUTE_STACK                                    \
 217                                                                         \
 218 /* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */       \
 219                                                                         \
 220 static int need_enable_exec_stack;                                      \
 221                                                                         \
 222 static void check_enabling(void) __attribute__ ((constructor));         \
 223 static void check_enabling(void)                                        \
 224 {                                                                       \
 225   extern long sysconf(int);                                             \
 226                                                                         \
 227   int prot = (int) sysconf(515 /* _SC_STACK_PROT */);                   \
 228   if (prot != 7 /* STACK_PROT_RWX */)                                   \
 229     need_enable_exec_stack = 1;                                         \
 230 }                                                                       \
 231                                                                         \
 232 extern void __enable_execute_stack (void *);                            \
 233 void                                                                    \
 234 __enable_execute_stack (void *addr)                                     \
 235 {                                                                       \
 236   extern int mprotect(void *, size_t, int);                             \
 237   if (!need_enable_exec_stack)                                          \
 238     return;                                                             \
 239   else {                                                                \
 240     long size = getpagesize ();                                         \
 241     long mask = ~(size-1);                                              \
 242     char *page = (char *) (((long) addr) & mask);                       \
 243     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
 244                                                                         \
 245     if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)        \
 246       perror ("mprotect of trampoline code");                           \
 247   }                                                                     \
 248 }
 249
 250 /* Support Solaris-specific format checking for cmn_err.  */
 251 #define TARGET_N_FORMAT_TYPES 1
 252 #define TARGET_FORMAT_TYPES solaris_format_types
 253
 254 /* #pragma init and #pragma fini are implemented on top of init and
 255    fini attributes.  */
 256 #define SOLARIS_ATTRIBUTE_TABLE                                         \
 257   { "init",      0, 0, true,  false,  false, NULL, false },             \
 258   { "fini",      0, 0, true,  false,  false, NULL, false }
 259
 260 /* Solaris/x86 as and gas support the common ELF .section/.pushsection
 261    syntax.  */
 262 #define PUSHSECTION_FORMAT      "\t.pushsection\t%s\n"
 263
 264 /* This is how to declare the size of a function.  For Solaris, we output
 265    any .init or .fini entries here.  */
 266 #undef ASM_DECLARE_FUNCTION_SIZE
 267 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 268   do                                                            \
 269     {                                                           \
 270       if (!flag_inhibit_size_directive)                         \
 271         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 272       solaris_output_init_fini (FILE, DECL);                    \
 273     }                                                           \
 274   while (0)
 275
 276 /* Solaris 'as' has a bug: a .common directive in .tbss or .tdata section
 277    behaves as .tls_common rather than normal non-TLS .common.  */
 278 #undef  ASM_OUTPUT_ALIGNED_COMMON
 279 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 280   do                                                                    \
 281     {                                                                   \
 282       if (TARGET_SUN_TLS                                                \
 283           && in_section                                                 \
 284           && ((in_section->common.flags & SECTION_TLS) == SECTION_TLS)) \
 285         switch_to_section (bss_section);                                \
 286       fprintf ((FILE), "%s", COMMON_ASM_OP);                            \
 287       assemble_name ((FILE), (NAME));                                   \
 288       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 289                (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
 290     }                                                                   \
 291   while (0)
 292
 293 #ifndef USE_GAS
 294 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 295 #define TARGET_ASM_ASSEMBLE_VISIBILITY solaris_assemble_visibility
 296
 297 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
 298
 299 #endif
 300
 301 extern GTY(()) tree solaris_pending_aligns;
 302 extern GTY(()) tree solaris_pending_inits;
 303 extern GTY(()) tree solaris_pending_finis;
 304
 305 /* Allow macro expansion in #pragma pack.  */
 306 #define HANDLE_PRAGMA_PACK_WITH_EXPANSION
 307
 308 #define TARGET_POSIX_IO