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
   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 %{!pthreads:%{!pthread:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}}} \
  84 %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
  85 "
  86
  87 /* Names to predefine in the preprocessor for this target machine.  */
  88 #define TARGET_SUB_OS_CPP_BUILTINS()
  89 #define TARGET_OS_CPP_BUILTINS()                        \
  90     do {                                                \
  91         builtin_define_std ("unix");                    \
  92         builtin_define_std ("sun");                     \
  93         builtin_define ("__svr4__");                    \
  94         builtin_define ("__SVR4");                      \
  95         builtin_assert ("system=unix");                 \
  96         builtin_assert ("system=svr4");                 \
  97         /* For C++ we need to add some additional macro \
  98            definitions required by the C++ standard     \
  99            library.  */                                 \
 100         if (c_dialect_cxx ())                           \
 101           {                                             \
 102             builtin_define ("__STDC_VERSION__=199901L");\
 103             builtin_define ("_XOPEN_SOURCE=600");       \
 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,*} -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    %{!symbolic:\
 128      %{pthreads|pthread:" \
 129         LIB_THREAD_LDFLAGS_SPEC " -lpthread " LIB_TLS_SPEC "} \
 130      %{!pthreads:%{!pthread:%{threads:" \
 131         LIB_THREAD_LDFLAGS_SPEC " -lthread}}} \
 132      %{p|pg:-ldl} -lc}"
 133
 134 #undef  ENDFILE_SPEC
 135 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 136
 137 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
 138 #undef STARTFILE_SPEC
 139 #define STARTFILE_SPEC "%{!shared: \
 140                          %{!symbolic: \
 141                           %{p:mcrt1.o%s} \
 142                           %{!p: \
 143                             %{pg:gcrt1.o%s gmon.o%s} \
 144                             %{!pg:crt1.o%s}}}} \
 145                         crti.o%s %(startfile_arch) \
 146                         crtbegin.o%s"
 147
 148 #undef STARTFILE_ARCH32_SPEC
 149 #define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
 150                             %{!ansi:values-Xa.o%s}"
 151
 152 #undef STARTFILE_ARCH_SPEC
 153 #define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
 154
 155 #undef LINK_ARCH32_SPEC_BASE
 156 #define LINK_ARCH32_SPEC_BASE \
 157   "%{G:-G} \
 158    %{YP,*} \
 159    %{R*} \
 160    %{compat-bsd: \
 161      %{!YP,*:%{p|pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
 162              %{!p:%{!pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib:%R/usr/lib}}} \
 163              -R %R/usr/ucblib} \
 164    %{!compat-bsd: \
 165      %{!YP,*:%{p|pg:-Y P,%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
 166              %{!p:%{!pg:-Y P,%R/usr/ccs/lib:%R/usr/lib}}}}"
 167
 168 #undef LINK_ARCH32_SPEC
 169 #define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
 170
 171 #undef LINK_ARCH_SPEC
 172 #define LINK_ARCH_SPEC LINK_ARCH32_SPEC
 173
 174 /* This should be the same as in svr4.h, except with -R added.  */
 175 #undef  LINK_SPEC
 176 #define LINK_SPEC \
 177   "%{h*} %{v:-V} \
 178    %{!shared:%{!static:%{rdynamic: " RDYNAMIC_SPEC "}}} \
 179    %{static:-dn -Bstatic} \
 180    %{shared:-G -dy %{!mimpure-text:-z text}} \
 181    %{symbolic:-Bsymbolic -G -dy -z text} \
 182    %(link_arch) \
 183    %{Qy:} %{!Qn:-Qy}"
 184
 185 /* With Sun ld, -rdynamic is a no-op.  */
 186 #define RDYNAMIC_SPEC ""
 187
 188 /* The Solaris linker doesn't understand constructor priorities.  (The
 189    GNU linker does support constructor priorities, so GNU ld
 190    configuration files for Solaris override this setting.)  */
 191 #undef SUPPORTS_INIT_PRIORITY
 192 #define SUPPORTS_INIT_PRIORITY 0
 193
 194 /* collect2.c can only parse GNU nm -n output.  Solaris nm needs -png to
 195    produce the same format.  */
 196 #define NM_FLAGS "-png"
 197
 198 #define STDC_0_IN_SYSTEM_HEADERS 1
 199 \f
 200 /*
 201  * Attempt to turn on access permissions for the stack.
 202  *
 203  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 204  * to run always.  2.6 can change the stack protection but has no way to
 205  * query it.
 206  *
 207  */
 208
 209 /* sys/mman.h is not present on some non-Solaris configurations
 210    that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
 211    number instead of the appropriate PROT_* flags.  */
 212
 213 #define ENABLE_EXECUTE_STACK                                    \
 214                                                                         \
 215 /* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */       \
 216                                                                         \
 217 static int need_enable_exec_stack;                                      \
 218                                                                         \
 219 static void check_enabling(void) __attribute__ ((constructor));         \
 220 static void check_enabling(void)                                        \
 221 {                                                                       \
 222   extern long sysconf(int);                                             \
 223                                                                         \
 224   int prot = (int) sysconf(515 /* _SC_STACK_PROT */);                   \
 225   if (prot != 7 /* STACK_PROT_RWX */)                                   \
 226     need_enable_exec_stack = 1;                                         \
 227 }                                                                       \
 228                                                                         \
 229 extern void __enable_execute_stack (void *);                            \
 230 void                                                                    \
 231 __enable_execute_stack (void *addr)                                     \
 232 {                                                                       \
 233   extern int mprotect(void *, size_t, int);                             \
 234   if (!need_enable_exec_stack)                                          \
 235     return;                                                             \
 236   else {                                                                \
 237     long size = getpagesize ();                                         \
 238     long mask = ~(size-1);                                              \
 239     char *page = (char *) (((long) addr) & mask);                       \
 240     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
 241                                                                         \
 242     if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)        \
 243       perror ("mprotect of trampoline code");                           \
 244   }                                                                     \
 245 }
 246
 247 /* Support Solaris-specific format checking for cmn_err.  */
 248 #define TARGET_N_FORMAT_TYPES 1
 249 #define TARGET_FORMAT_TYPES solaris_format_types
 250
 251 /* #pragma init and #pragma fini are implemented on top of init and
 252    fini attributes.  */
 253 #define SOLARIS_ATTRIBUTE_TABLE                                         \
 254   { "init",      0, 0, true,  false,  false, NULL },                    \
 255   { "fini",      0, 0, true,  false,  false, NULL }
 256
 257 /* Solaris/x86 as and gas support the common ELF .section/.pushsection
 258    syntax.  */
 259 #define PUSHSECTION_FORMAT      "\t.pushsection\t%s\n"
 260
 261 /* This is how to declare the size of a function.  For Solaris, we output
 262    any .init or .fini entries here.  */
 263 #undef ASM_DECLARE_FUNCTION_SIZE
 264 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 265   do                                                            \
 266     {                                                           \
 267       if (!flag_inhibit_size_directive)                         \
 268         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 269       solaris_output_init_fini (FILE, DECL);                    \
 270     }                                                           \
 271   while (0)
 272
 273 /* Solaris 'as' has a bug: a .common directive in .tbss section
 274    behaves as .tls_common rather than normal non-TLS .common.  */
 275 #undef  ASM_OUTPUT_ALIGNED_COMMON
 276 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 277   do                                                                    \
 278     {                                                                   \
 279       if (TARGET_SUN_TLS                                                \
 280           && in_section                                                 \
 281           && ((in_section->common.flags & (SECTION_TLS | SECTION_BSS))  \
 282               == (SECTION_TLS | SECTION_BSS)))                          \
 283         switch_to_section (bss_section);                                \
 284       fprintf ((FILE), "%s", COMMON_ASM_OP);                            \
 285       assemble_name ((FILE), (NAME));                                   \
 286       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 287                (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
 288     }                                                                   \
 289   while (0)
 290
 291 #ifndef USE_GAS
 292 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 293 #define TARGET_ASM_ASSEMBLE_VISIBILITY solaris_assemble_visibility
 294 #endif
 295
 296 extern GTY(()) tree solaris_pending_aligns;
 297 extern GTY(()) tree solaris_pending_inits;
 298 extern GTY(()) tree solaris_pending_finis;
 299
 300 /* Allow macro expansion in #pragma pack.  */
 301 #define HANDLE_PRAGMA_PACK_WITH_EXPANSION