gcc/config/sparc/sol2.h

   1 /* Definitions of target machine for GNU compiler, for SPARC running Solaris 2
   2    Copyright 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4    Contributed by Ron Guilmette (rfg@netcom.com).
   5    Additional changes by David V. Henkel-Wallace (gumby@cygnus.com).
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* Supposedly the same as vanilla sparc svr4, except for the stuff below: */
  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 32
  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 32
  40
  41 #define HANDLE_PRAGMA_REDEFINE_EXTNAME 1
  42
  43 #undef CPP_PREDEFINES
  44 #define CPP_PREDEFINES \
  45 "-Dsparc -Dsun -Dunix -D__svr4__ -D__SVR4 -D__PRAGMA_REDEFINE_EXTNAME \
  46 -Asystem=unix -Asystem=svr4"
  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 /* For C++ we need to add some additional macro definitions required
  56    by the C++ standard library.  */
  57 #define CPLUSPLUS_CPP_SPEC "\
  58 -D_XOPEN_SOURCE=500 -D_LARGEFILE_SOURCE=1 -D_LARGEFILE64_SOURCE=1 \
  59 -D__EXTENSIONS__ \
  60 %(cpp) \
  61 "
  62
  63 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
  64    It's safe to pass -s always, even if -g is not used.  */
  65 #undef ASM_SPEC
  66 #define ASM_SPEC "\
  67 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
  68 %{fpic:-K PIC} %{fPIC:-K PIC} \
  69 %(asm_cpu) \
  70 "
  71
  72 /* This is here rather than in sparc.h because it's not known what
  73    other assemblers will accept.  */
  74 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9
  75 #undef ASM_CPU_DEFAULT_SPEC
  76 #define ASM_CPU_DEFAULT_SPEC "-xarch=v8plus"
  77 #endif
  78 #if TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc
  79 #undef ASM_CPU_DEFAULT_SPEC
  80 #define ASM_CPU_DEFAULT_SPEC "-xarch=v8plusa"
  81 #endif
  82 #undef ASM_CPU_SPEC
  83 #define ASM_CPU_SPEC "\
  84 %{mcpu=v8plus:-xarch=v8plus} \
  85 %{mcpu=ultrasparc:-xarch=v8plusa} \
  86 %{!mcpu*:%(asm_cpu_default)} \
  87 "
  88
  89 /* However it appears that Solaris 2.0 uses the same reg numbering as
  90    the old BSD-style system did.  */
  91
  92 /* Same as sparc.h */
  93 #undef DBX_REGISTER_NUMBER
  94 #define DBX_REGISTER_NUMBER(REGNO) \
  95   (TARGET_FLAT && (REGNO) == HARD_FRAME_POINTER_REGNUM ? 31 : REGNO)
  96
  97 /* We use stabs-in-elf by default, because that is what the native
  98    toolchain uses.  */
  99 #undef PREFERRED_DEBUGGING_TYPE
 100 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 101
 102 /* The Solaris 2 assembler uses .skip, not .zero, so put this back.  */
 103 #undef ASM_OUTPUT_SKIP
 104 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
 105   fprintf (FILE, "\t.skip %u\n", (SIZE))
 106
 107 #undef  LOCAL_LABEL_PREFIX
 108 #define LOCAL_LABEL_PREFIX  "."
 109
 110 /* This is how to output a definition of an internal numbered label where
 111    PREFIX is the class of label and NUM is the number within the class.  */
 112
 113 #undef  ASM_OUTPUT_INTERNAL_LABEL
 114 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 115   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 116
 117 /* This is how to output a reference to an internal numbered label where
 118    PREFIX is the class of label and NUM is the number within the class.  */
 119
 120 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 121 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 122   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 123
 124 /* This is how to store into the string LABEL
 125    the symbol_ref name of an internal numbered label where
 126    PREFIX is the class of label and NUM is the number within the class.
 127    This is suitable for output with `assemble_name'.  */
 128
 129 #undef  ASM_GENERATE_INTERNAL_LABEL
 130 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 131   sprintf ((LABEL), "*.L%s%ld", (PREFIX), (long)(NUM))
 132
 133 \f
 134 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.
 135    We don't use the standard LIB_SPEC only because we don't yet support c++ */
 136
 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 \
 145                         %{ansi:values-Xc.o%s} \
 146                         %{!ansi:values-Xa.o%s} \
 147                         crtbegin.o%s"
 148
 149 /* ??? Note: in order for -compat-bsd to work fully,
 150    we must somehow arrange to fixincludes /usr/ucbinclude
 151    and put the result in $(libsubdir)/ucbinclude.  */
 152
 153 #undef LIB_SPEC
 154 #define LIB_SPEC \
 155   "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
 156    %{!shared:\
 157      %{!symbolic:\
 158        %{pthreads:-lpthread} \
 159        %{!pthreads:%{threads:-lthread}} \
 160        %{p|pg:-ldl} -lc}}"
 161
 162 #undef  ENDFILE_SPEC
 163 #define ENDFILE_SPEC \
 164   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
 165    crtend.o%s crtn.o%s"
 166
 167 /* This should be the same as in svr4.h, except with -R added.  */
 168 #undef LINK_SPEC
 169 #define LINK_SPEC \
 170   "%{h*} %{v:-V} \
 171    %{b} %{Wl,*:%*} \
 172    %{static:-dn -Bstatic} \
 173    %{shared:-G -dy %{!mimpure-text:-z text}} \
 174    %{symbolic:-Bsymbolic -G -dy -z text} \
 175    %{G:-G} \
 176    %{YP,*} \
 177    %{R*} \
 178    %{compat-bsd: \
 179      %{!YP,*:%{pg:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 180              %{!pg:%{p:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 181                    %{!p:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}}} \
 182              -R /usr/ucblib} \
 183    %{!compat-bsd: \
 184      %{!YP,*:%{pg:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 185              %{!pg:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 186                    %{!p:-Y P,/usr/ccs/lib:/usr/lib}}}} \
 187    %{Qy:} %{!Qn:-Qy}"
 188
 189 /* This defines which switch letters take arguments.
 190    It is as in svr4.h but with -R added.  */
 191
 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) == 'x' \
 198    || (CHAR) == 'z')
 199
 200 /* Select a format to encode pointers in exception handling data.  CODE
 201    is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
 202    true if the symbol may be affected by dynamic relocations.
 203
 204    Some Solaris dynamic linkers don't handle unaligned section relative
 205    relocs properly, so force them to be aligned.  */
 206 #ifndef HAVE_AS_SPARC_UA_PCREL
 207 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)               \
 208   ((flag_pic || GLOBAL) ? DW_EH_PE_aligned : DW_EH_PE_absptr)
 209 #endif
 210 \f
 211 /* ??? This does not work in SunOS 4.x, so it is not enabled in sparc.h.
 212    Instead, it is enabled here, because it does work under Solaris.  */
 213 /* Define for support of TFmode long double.
 214    Sparc ABI says that long double is 4 words.  */
 215 #define LONG_DOUBLE_TYPE_SIZE 128
 216
 217 /* But indicate that it isn't supported by the hardware.  */
 218 #define WIDEST_HARDWARE_FP_SIZE 64
 219
 220 #define STDC_0_IN_SYSTEM_HEADERS 1
 221
 222 #define MULDI3_LIBCALL "__mul64"
 223 #define DIVDI3_LIBCALL "__div64"
 224 #define UDIVDI3_LIBCALL "__udiv64"
 225 #define MODDI3_LIBCALL "__rem64"
 226 #define UMODDI3_LIBCALL "__urem64"
 227
 228 /* Solaris's _Qp_* library routine implementation clobbers the output
 229    memory before the inputs are fully consumed.  */
 230
 231 #undef TARGET_BUGGY_QP_LIB
 232 #define TARGET_BUGGY_QP_LIB     1
 233
 234 #undef INIT_SUBTARGET_OPTABS
 235 #define INIT_SUBTARGET_OPTABS                                           \
 236   fixsfdi_libfunc                                                       \
 237     = init_one_libfunc (TARGET_ARCH64 ? "__ftol" : "__ftoll");          \
 238   fixunssfdi_libfunc                                                    \
 239     = init_one_libfunc (TARGET_ARCH64 ? "__ftoul" : "__ftoull");        \
 240   fixdfdi_libfunc                                                       \
 241     = init_one_libfunc (TARGET_ARCH64 ? "__dtol" : "__dtoll");          \
 242   fixunsdfdi_libfunc                                                    \
 243     = init_one_libfunc (TARGET_ARCH64 ? "__dtoul" : "__dtoull")
 244
 245 /* Solaris allows 64 bit out and global registers in 32 bit mode.
 246    sparc_override_options will disable V8+ if not generating V9 code.  */
 247 #undef TARGET_DEFAULT
 248 #define TARGET_DEFAULT (MASK_FPU + MASK_V8PLUS + MASK_LONG_DOUBLE_128)
 249 \f
 250 /*
 251  * Attempt to turn on access permissions for the stack.
 252  *
 253  * This code must be defined when compiling gcc but not when compiling
 254  * libgcc2.a, unless we're generating code for 64 bits SPARC
 255  *
 256  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 257  * to run always.  2.6 can change the stack protection but has no way to
 258  * query it.
 259  *
 260  */
 261
 262 /* This declares mprotect (used in TRANSFER_FROM_TRAMPOLINE) for
 263    libgcc2.c.  */
 264 /* We don't want to include this because sys/mman.h is not present on
 265    some non-Solaris configurations that use sol2.h.  */
 266 #if 0 /* def L_trampoline */
 267 #include <sys/mman.h>
 268 #endif
 269
 270 #define TRANSFER_FROM_TRAMPOLINE                                        \
 271 static int need_enable_exec_stack;                                      \
 272                                                                         \
 273 static void check_enabling(void) __attribute__ ((constructor));         \
 274 static void check_enabling(void)                                        \
 275 {                                                                       \
 276   extern long sysconf(int);                                             \
 277                                                                         \
 278   int prot = (int) sysconf(515 /*_SC_STACK_PROT */);                    \
 279   if (prot != 7)                                                        \
 280     need_enable_exec_stack = 1;                                         \
 281 }                                                                       \
 282                                                                         \
 283 extern void __enable_execute_stack (void *);                            \
 284 void                                                                    \
 285 __enable_execute_stack (addr)                                           \
 286      void *addr;                                                        \
 287 {                                                                       \
 288   if (!need_enable_exec_stack)                                          \
 289     return;                                                             \
 290   else {                                                                \
 291     long size = getpagesize ();                                         \
 292     long mask = ~(size-1);                                              \
 293     char *page = (char *) (((long) addr) & mask);                       \
 294     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
 295                                                                         \
 296     /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */                       \
 297     if (mprotect (page, end - page, 7) < 0)                             \
 298       perror ("mprotect of trampoline code");                           \
 299   }                                                                     \
 300 }