gcc/config/sparc/freebsd.h

   1 /* Definitions for Sun SPARC64 running FreeBSD using the ELF format
   2    Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   3    Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #undef  SUBTARGET_EXTRA_SPECS
  22 #define SUBTARGET_EXTRA_SPECS \
  23   { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
  24
  25 /* FreeBSD needs the platform name (sparc64) defined.
  26    Emacs needs to know if the arch is 64 or 32-bits.  */
  27
  28 #undef  CPP_CPU64_DEFAULT_SPEC
  29 #define CPP_CPU64_DEFAULT_SPEC \
  30   "-D__sparc64__ -D__sparc_v9__ -D__sparcv9 -D__arch64__"
  31
  32 #define LINK_SPEC "%(link_arch)                                         \
  33   %{!mno-relax:%{!r:-relax}}                                            \
  34   %{p:%nconsider using `-pg' instead of `-p' with gprof(1)}             \
  35   %{assert*} %{R*} %{rpath*} %{defsym*}                                 \
  36   %{shared:-Bshareable %{h*} %{soname*}}                                \
  37   %{symbolic:-Bsymbolic}                                                \
  38   %{!shared:                                                            \
  39     %{!static:                                                          \
  40       %{rdynamic:-export-dynamic}                                       \
  41       %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }}       \
  42     %{static:-Bstatic}}"
  43
  44
  45 /************************[  Target stuff  ]***********************************/
  46
  47 /* Define the actual types of some ANSI-mandated types.
  48    Needs to agree with <machine/ansi.h>.  GCC defaults come from c-decl.c,
  49    c-common.c, and config/<arch>/<arch>.h.  */
  50
  51 /* Earlier headers may get this wrong for FreeBSD.
  52    We use the GCC defaults instead.  */
  53 #undef WCHAR_TYPE
  54
  55 #undef  WCHAR_TYPE_SIZE
  56 #define WCHAR_TYPE_SIZE 32
  57
  58 /* Define for support of TFmode long double.
  59    SPARC ABI says that long double is 4 words.  */
  60 #undef  LONG_DOUBLE_TYPE_SIZE
  61 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
  62
  63 /* Define this to set long double type size to use in libgcc2.c, which can
  64    not depend on target_flags.  */
  65 #if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
  66 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
  67 #else
  68 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
  69 #endif
  70
  71 /* Definitions for 64-bit SPARC running systems with ELF. */
  72
  73 #undef  TARGET_VERSION
  74 #define TARGET_VERSION fprintf (stderr, " (FreeBSD/sparc64 ELF)");
  75
  76 #define TARGET_ELF              1
  77
  78 /* XXX */
  79 /* A 64 bit v9 compiler with stack-bias,
  80    in a Medium/mid code model environment.  */
  81
  82 #undef  TARGET_DEFAULT
  83 #define TARGET_DEFAULT \
  84   (MASK_V9 + MASK_64BIT + MASK_PTR64 /* + MASK_FASTER_STRUCTS */ \
  85    + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU \
  86    + MASK_LONG_DOUBLE_128 /* + MASK_HARD_QUAD */)
  87
  88 /* The default code model.  */
  89 #undef  SPARC_DEFAULT_CMODEL
  90 #define SPARC_DEFAULT_CMODEL    CM_MEDLOW
  91
  92 #define ENABLE_EXECUTE_STACK                                            \
  93   static int need_enable_exec_stack;                                    \
  94   static void check_enabling(void) __attribute__ ((constructor));       \
  95   static void check_enabling(void)                                      \
  96   {                                                                     \
  97     extern int sysctlbyname(const char *, void *, size_t *, void *, size_t);\
  98     int prot = 0;                                                       \
  99     size_t len = sizeof(prot);                                          \
 100                                                                         \
 101     sysctlbyname ("kern.stackprot", &prot, &len, NULL, 0);              \
 102     if (prot != 7)                                                      \
 103       need_enable_exec_stack = 1;                                       \
 104   }                                                                     \
 105   extern void __enable_execute_stack (void *);                          \
 106   void __enable_execute_stack (void *addr)                              \
 107   {                                                                     \
 108     if (!need_enable_exec_stack)                                        \
 109       return;                                                           \
 110     else {                                                              \
 111       /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */                     \
 112       if (mprotect (addr, TRAMPOLINE_SIZE, 7) < 0)                      \
 113         perror ("mprotect of trampoline code");                         \
 114     }                                                                   \
 115   }
 116
 117
 118 /************************[  Assembler stuff  ]********************************/
 119
 120 #undef  LOCAL_LABEL_PREFIX
 121 #define LOCAL_LABEL_PREFIX  "."
 122
 123 /* XXX2 */
 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%lu", PREFIX, (unsigned long)(NUM))
 132
 133
 134 /************************[  Debugger stuff  ]*********************************/
 135
 136 /* This is the char to use for continuation (in case we need to turn
 137    continuation back on).  */
 138
 139 #undef  DBX_CONTIN_CHAR
 140 #define DBX_CONTIN_CHAR '?'
 141
 142 /* DWARF bits.  */
 143
 144 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 145    Obviously the Dwarf2 folks havn't tried to actually build systems
 146    with their spec.  On a 64-bit system, only 64-bit relocs become
 147    RELATIVE relocations.  */
 148
 149 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 150
 151 #undef ENDFILE_SPEC
 152 #define ENDFILE_SPEC                                            \
 153   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "   \
 154   FBSD_ENDFILE_SPEC
 155
 156 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 157 #undef CTORS_SECTION_ASM_OP
 158 #undef DTORS_SECTION_ASM_OP