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 Free Software Foundation, Inc.
   3    Contributed by Ron Guilmette (rfg@netcom.com).
   4    Additional changes by David V. Henkel-Wallace (gumby@cygnus.com).
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC 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 2, or (at your option)
  11 any later version.
  12
  13 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* Supposedly the same as vanilla sparc svr4, except for the stuff below: */
  24 #include "sparc/sysv4.h"
  25
  26 #undef CPP_PREDEFINES
  27 #define CPP_PREDEFINES \
  28 "-Dsparc -Dsun -Dunix -D__svr4__ -D__SVR4 \
  29 -Asystem(unix) -Asystem(svr4)"
  30
  31 #undef CPP_SUBTARGET_SPEC
  32 #define CPP_SUBTARGET_SPEC "\
  33 %{pthreads:-D_REENTRANT -D_PTHREADS} \
  34 %{!pthreads:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}} \
  35 %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
  36 "
  37
  38 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
  39    It's safe to pass -s always, even if -g is not used. */
  40 #undef ASM_SPEC
  41 #define ASM_SPEC "\
  42 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
  43 %{fpic:-K PIC} %{fPIC:-K PIC} \
  44 %(asm_cpu) \
  45 "
  46
  47 /* This is here rather than in sparc.h because it's not known what
  48    other assemblers will accept.  */
  49 #if TARGET_CPU_DEFAULT == TARGET_CPU_v9
  50 #undef ASM_CPU_DEFAULT_SPEC
  51 #define ASM_CPU_DEFAULT_SPEC "-xarch=v8plus"
  52 #endif
  53 #if TARGET_CPU_DEFAULT == TARGET_CPU_ultrasparc
  54 #undef ASM_CPU_DEFAULT_SPEC
  55 #define ASM_CPU_DEFAULT_SPEC "-xarch=v8plusa"
  56 #endif
  57 #undef ASM_CPU_SPEC
  58 #define ASM_CPU_SPEC "\
  59 %{mcpu=v8plus:-xarch=v8plus} \
  60 %{mcpu=ultrasparc:-xarch=v8plusa} \
  61 %{!mcpu*:%(asm_cpu_default)} \
  62 "
  63
  64 /* However it appears that Solaris 2.0 uses the same reg numbering as
  65    the old BSD-style system did. */
  66
  67 #undef DBX_REGISTER_NUMBER
  68 /* Same as sparc.h */
  69 #define DBX_REGISTER_NUMBER(REGNO) \
  70   (TARGET_FLAT && REGNO == FRAME_POINTER_REGNUM ? 31 : REGNO)
  71
  72 /* We use stabs-in-elf for debugging, because that is what the native
  73    toolchain uses.  */
  74 #undef PREFERRED_DEBUGGING_TYPE
  75 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  76
  77 /* The Solaris 2 assembler uses .skip, not .zero, so put this back. */
  78 #undef ASM_OUTPUT_SKIP
  79 #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  80   fprintf (FILE, "\t.skip %u\n", (SIZE))
  81
  82 /* Use .uahalf/.uaword so packed structure members don't generate
  83    assembler errors when using the native assembler.  */
  84 #undef ASM_SHORT
  85 #define ASM_SHORT ".uahalf"
  86 #undef ASM_LONG
  87 #define ASM_LONG ".uaword"
  88
  89 /* This is how to output a definition of an internal numbered label where
  90    PREFIX is the class of label and NUM is the number within the class.  */
  91
  92 #undef  ASM_OUTPUT_INTERNAL_LABEL
  93 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
  94   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
  95
  96 /* This is how to output a reference to an internal numbered label where
  97    PREFIX is the class of label and NUM is the number within the class.  */
  98
  99 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 100 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 101   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 102
 103 /* This is how to store into the string LABEL
 104    the symbol_ref name of an internal numbered label where
 105    PREFIX is the class of label and NUM is the number within the class.
 106    This is suitable for output with `assemble_name'.  */
 107
 108 #undef  ASM_GENERATE_INTERNAL_LABEL
 109 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 110   sprintf ((LABEL), "*.L%s%ld", (PREFIX), (long)(NUM))
 111
 112 \f
 113 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.
 114    We don't use the standard LIB_SPEC only because we don't yet support c++ */
 115
 116 #undef STARTFILE_SPEC
 117 #define STARTFILE_SPEC "%{!shared: \
 118                          %{!symbolic: \
 119                           %{p:mcrt1.o%s} \
 120                           %{!p: \
 121                             %{pg:gcrt1.o%s gmon.o%s} \
 122                             %{!pg:crt1.o%s}}}} \
 123                         crti.o%s \
 124                         %{ansi:values-Xc.o%s} \
 125                         %{!ansi: \
 126                          %{traditional:values-Xt.o%s} \
 127                          %{!traditional:values-Xa.o%s}} \
 128                         crtbegin.o%s"
 129
 130 /* ??? Note: in order for -compat-bsd to work fully,
 131    we must somehow arrange to fixincludes /usr/ucbinclude
 132    and put the result in $(libsubdir)/ucbinclude.  */
 133
 134 #undef LIB_SPEC
 135 #define LIB_SPEC \
 136   "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
 137    %{!shared:\
 138      %{!symbolic:\
 139        %{pthreads:-lpthread} \
 140        %{!pthreads:%{threads:-lthread}} \
 141        %{p|pg:-ldl} -lc}}"
 142
 143 #undef  ENDFILE_SPEC
 144 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 145
 146 /* This should be the same as in svr4.h, except with -R added.  */
 147 #undef LINK_SPEC
 148 #define LINK_SPEC \
 149   "%{h*} %{v:-V} \
 150    %{b} %{Wl,*:%*} \
 151    %{static:-dn -Bstatic} \
 152    %{shared:-G -dy %{!mimpure-text:-z text}} \
 153    %{symbolic:-Bsymbolic -G -dy -z text} \
 154    %{G:-G} \
 155    %{YP,*} \
 156    %{R*} \
 157    %{compat-bsd: \
 158      %{!YP,*:%{pg:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 159              %{!pg:%{p:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 160                    %{!p:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}}} \
 161              -R /usr/ucblib} \
 162    %{!compat-bsd: \
 163      %{!YP,*:%{pg:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 164              %{!pg:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 165                    %{!p:-Y P,/usr/ccs/lib:/usr/lib}}}} \
 166    %{Qy:} %{!Qn:-Qy}"
 167
 168 /* This defines which switch letters take arguments.
 169    It is as in svr4.h but with -R added.  */
 170
 171 #undef SWITCH_TAKES_ARG
 172 #define SWITCH_TAKES_ARG(CHAR) \
 173   (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
 174    || (CHAR) == 'R' \
 175    || (CHAR) == 'h' \
 176    || (CHAR) == 'x' \
 177    || (CHAR) == 'z')
 178 \f
 179 /* ??? This does not work in SunOS 4.x, so it is not enabled in sparc.h.
 180    Instead, it is enabled here, because it does work under Solaris.  */
 181 /* Define for support of TFmode long double and REAL_ARITHMETIC.
 182    Sparc ABI says that long double is 4 words.  */
 183 #define LONG_DOUBLE_TYPE_SIZE 128
 184
 185 /* But indicate that it isn't supported by the hardware.  */
 186 #define WIDEST_HARDWARE_FP_SIZE 64
 187
 188 #define STDC_0_IN_SYSTEM_HEADERS
 189
 190 #define MULDI3_LIBCALL "__mul64"
 191 #define DIVDI3_LIBCALL "__div64"
 192 #define UDIVDI3_LIBCALL "__udiv64"
 193 #define MODDI3_LIBCALL "__rem64"
 194 #define UMODDI3_LIBCALL "__urem64"
 195
 196 #undef INIT_SUBTARGET_OPTABS
 197 #define INIT_SUBTARGET_OPTABS                                           \
 198   fixsfdi_libfunc                                                       \
 199     = init_one_libfunc (TARGET_ARCH64 ? "__ftol" : "__ftoll");          \
 200   fixunssfdi_libfunc                                                    \
 201     = init_one_libfunc (TARGET_ARCH64 ? "__ftoul" : "__ftoull");        \
 202   fixdfdi_libfunc                                                       \
 203     = init_one_libfunc (TARGET_ARCH64 ? "__dtol" : "__dtoll");          \
 204   fixunsdfdi_libfunc                                                    \
 205     = init_one_libfunc (TARGET_ARCH64 ? "__dtoul" : "__dtoull")
 206
 207 /* No weird SPARC variants on Solaris */
 208 #undef TARGET_LIVE_G0
 209 #define TARGET_LIVE_G0  0
 210 #undef TARGET_BROKEN_SAVERESTORE
 211 #define TARGET_BROKEN_SAVERESTORE 0
 212
 213 /* Solaris allows 64 bit out and global registers in 32 bit mode.
 214    sparc_override_options will disable V8+ if not generating V9 code.  */
 215 #undef TARGET_DEFAULT
 216 #define TARGET_DEFAULT (MASK_EPILOGUE + MASK_FPU + MASK_V8PLUS)
 217 \f
 218 #if TARGET_ARCH32
 219 /* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
 220    traps available which can get and set the condition codes
 221    reliably.  */
 222 #undef MACHINE_STATE_SAVE
 223 #define MACHINE_STATE_SAVE(ID)                          \
 224   unsigned long int ms_flags, ms_saveret;               \
 225   asm volatile("ta      0x20\n\t"                       \
 226                "mov     %%g1, %0\n\t"                   \
 227                "mov     %%g2, %1\n\t"                   \
 228                : "=r" (ms_flags), "=r" (ms_saveret));
 229
 230 #undef MACHINE_STATE_RESTORE
 231 #define MACHINE_STATE_RESTORE(ID)                       \
 232   asm volatile("mov     %0, %%g1\n\t"                   \
 233                "mov     %1, %%g2\n\t"                   \
 234                "ta      0x21\n\t"                       \
 235                : /* no outputs */                       \
 236                : "r" (ms_flags), "r" (ms_saveret));
 237 #endif /* sparc32 */
 238 \f
 239 /*
 240  * Attempt to turn on access permissions for the stack.
 241  *
 242  * This code must be defined when compiling gcc but not when compiling
 243  * libgcc2.a, unless we're generating code for 64 bits SPARC
 244  *
 245  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
 246  * to run always.  2.6 can change the stack protection but has no way to
 247  * query it.
 248  *
 249  */
 250
 251 #define TRANSFER_FROM_TRAMPOLINE                                        \
 252 static int need_enable_exec_stack;                                      \
 253                                                                         \
 254 static void check_enabling(void) __attribute__ ((constructor));         \
 255 static void check_enabling(void)                                        \
 256 {                                                                       \
 257   extern long sysconf(int);                                             \
 258                                                                         \
 259   int prot = (int) sysconf(515 /*_SC_STACK_PROT */);                    \
 260   if (prot != 7)                                                        \
 261     need_enable_exec_stack = 1;                                         \
 262 }                                                                       \
 263                                                                         \
 264 void                                                                    \
 265 __enable_execute_stack (addr)                                           \
 266      void *addr;                                                        \
 267 {                                                                       \
 268   if (!need_enable_exec_stack)                                          \
 269     return;                                                             \
 270   else {                                                                \
 271     long size = getpagesize ();                                         \
 272     long mask = ~(size-1);                                              \
 273     char *page = (char *) (((long) addr) & mask);                       \
 274     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
 275                                                                         \
 276     /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */                       \
 277     if (mprotect (page, end - page, 7) < 0)                             \
 278       perror ("mprotect of trampoline code");                           \
 279   }                                                                     \
 280 }