Subversion Repositories openrisc_2011-10-31

/* Definitions for Sun SPARC64 running FreeBSD using the ELF format

   Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.

   Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3, or (at your option)

any later version.

GCC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

#undef  SUBTARGET_EXTRA_SPECS

#define SUBTARGET_EXTRA_SPECS \

  { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }

/* FreeBSD needs the platform name (sparc64) defined.

   Emacs needs to know if the arch is 64 or 32-bits.  */

#undef  CPP_CPU64_DEFAULT_SPEC

#define CPP_CPU64_DEFAULT_SPEC \

  "-D__sparc64__ -D__sparc_v9__ -D__sparcv9 -D__arch64__"

#define LINK_SPEC "%(link_arch)                                         \

  %{!mno-relax:%{!r:-relax}}                                            \

  %{p:%nconsider using `-pg' instead of `-p' with gprof(1)}             \

  %{assert*} %{R*} %{rpath*} %{defsym*}                                 \

  %{shared:-Bshareable %{h*} %{soname*}}                                \

  %{symbolic:-Bsymbolic}                                                \

  %{!shared:                                                            \

    %{!static:                                                          \

      %{rdynamic:-export-dynamic}                                       \

      %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }}       \

    %{static:-Bstatic}}"

/************************[  Target stuff  ]***********************************/

/* Define the actual types of some ANSI-mandated types.

   Needs to agree with <machine/ansi.h>.  GCC defaults come from c-decl.c,

   c-common.c, and config/<arch>/<arch>.h.  */

/* Earlier headers may get this wrong for FreeBSD.

   We use the GCC defaults instead.  */

#undef WCHAR_TYPE

#undef  WCHAR_TYPE_SIZE

#define WCHAR_TYPE_SIZE 32

/* Define for support of TFmode long double.

   SPARC ABI says that long double is 4 words.  */

#undef  LONG_DOUBLE_TYPE_SIZE

#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)

/* Define this to set long double type size to use in libgcc2.c, which can

   not depend on target_flags.  */

#if defined(__arch64__) || defined(__LONG_DOUBLE_128__)

#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128

#else

#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64

#endif

/* Definitions for 64-bit SPARC running systems with ELF. */

#undef  TARGET_VERSION

#define TARGET_VERSION fprintf (stderr, " (FreeBSD/sparc64 ELF)");

#define TARGET_ELF              1

/* XXX */

/* A 64 bit v9 compiler with stack-bias,

   in a Medium/mid code model environment.  */

#undef  TARGET_DEFAULT

#define TARGET_DEFAULT \

  (MASK_V9 + MASK_64BIT + MASK_PTR64 /* + MASK_FASTER_STRUCTS */ \

   + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU \

   + MASK_LONG_DOUBLE_128 /* + MASK_HARD_QUAD */)

/* The default code model.  */

#undef  SPARC_DEFAULT_CMODEL

#define SPARC_DEFAULT_CMODEL    CM_MEDLOW

#define ENABLE_EXECUTE_STACK                                            \

  static int need_enable_exec_stack;                                    \

  static void check_enabling(void) __attribute__ ((constructor));       \

  static void check_enabling(void)                                      \

  {                                                                     \

    extern int sysctlbyname(const char *, void *, size_t *, void *, size_t);\

    int prot = 0;                                                       \

    size_t len = sizeof(prot);                                          \

                                                                        \

    sysctlbyname ("kern.stackprot", &prot, &len, NULL, 0);              \

    if (prot != 7)                                                      \

      need_enable_exec_stack = 1;                                       \

  }                                                                     \

  extern void __enable_execute_stack (void *);                          \

  void __enable_execute_stack (void *addr)                              \

  {                                                                     \

    if (!need_enable_exec_stack)                                        \

      return;                                                           \

    else {                                                              \

      /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */                     \

      if (mprotect (addr, TRAMPOLINE_SIZE, 7) < 0)                      \

        perror ("mprotect of trampoline code");                         \

    }                                                                   \

  }

/************************[  Assembler stuff  ]********************************/

#undef  LOCAL_LABEL_PREFIX

#define LOCAL_LABEL_PREFIX  "."

/* XXX2 */

/* This is how to store into the string LABEL

   the symbol_ref name of an internal numbered label where

   PREFIX is the class of label and NUM is the number within the class.

   This is suitable for output with `assemble_name'.  */

#undef  ASM_GENERATE_INTERNAL_LABEL

#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)                   \

  sprintf (LABEL, "*.L%s%lu", PREFIX, (unsigned long)(NUM))

/************************[  Debugger stuff  ]*********************************/

/* This is the char to use for continuation (in case we need to turn

   continuation back on).  */

#undef  DBX_CONTIN_CHAR

#define DBX_CONTIN_CHAR '?'

/* DWARF bits.  */

/* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.

   Obviously the Dwarf2 folks havn't tried to actually build systems

   with their spec.  On a 64-bit system, only 64-bit relocs become

   RELATIVE relocations.  */

/* #define DWARF_OFFSET_SIZE PTR_SIZE */

#undef ENDFILE_SPEC

#define ENDFILE_SPEC                                            \

  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "   \

  FBSD_ENDFILE_SPEC

/* We use GNU ld so undefine this so that attribute((init_priority)) works.  */

#undef CTORS_SECTION_ASM_OP

#undef DTORS_SECTION_ASM_OP