freebsd.h revision 174482 
1/* Definitions for Sun SPARC64 running FreeBSD using the ELF format
2   Copyright (C) 2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
3   Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to
19the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22/* $FreeBSD: head/contrib/gcc/config/sparc/freebsd.h 174482 2007-12-09 17:41:47Z marius $ */
23
24#undef  SUBTARGET_EXTRA_SPECS
25#define SUBTARGET_EXTRA_SPECS \
26  { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
27
28/* FreeBSD needs the platform name (sparc64) defined.
29   Emacs needs to know if the arch is 64 or 32-bits.
30   This also selects which targets are available via -mcpu.  */
31
32#undef  FBSD_TARGET_CPU_CPP_BUILTINS
33#define FBSD_TARGET_CPU_CPP_BUILTINS()		\
34  do						\
35    {						\
36      builtin_define ("__LP64__");		\
37      builtin_define ("__sparc64__");		\
38      builtin_define ("__sparc_v9__");		\
39      builtin_define ("__sparcv9");		\
40      builtin_define ("__sparc__");		\
41      builtin_define ("__arch64__");		\
42    }						\
43  while (0)
44
45#define LINK_SPEC "%(link_arch)						\
46  %{!mno-relax:%{!r:-relax}}						\
47  %{p:%nconsider using `-pg' instead of `-p' with gprof(1)}		\
48  %{assert*} %{R*} %{rpath*} %{defsym*}					\
49  %{shared:-Bshareable %{h*} %{soname*}}				\
50  %{symbolic:-Bsymbolic}						\
51  %{!shared:								\
52    %{!static:								\
53      %{rdynamic:-export-dynamic}					\
54      %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }}	\
55    %{static:-Bstatic}}"
56
57
58/************************[  Target stuff  ]***********************************/
59
60/* Define the actual types of some ANSI-mandated types.
61   Needs to agree with <machine/ansi.h>.  GCC defaults come from c-decl.c,
62   c-common.c, and config/<arch>/<arch>.h.  */
63
64/* Earlier headers may get this wrong for FreeBSD.
65   We use the GCC defaults instead.  */
66#undef WCHAR_TYPE
67
68#undef  WCHAR_TYPE_SIZE
69#define WCHAR_TYPE_SIZE 32
70
71/* Define for support of TFmode long double.
72   SPARC ABI says that long double is 4 words.  */
73#undef  LONG_DOUBLE_TYPE_SIZE
74#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
75
76/* Define this to set long double type size to use in libgcc2.c, which can
77   not depend on target_flags.  */
78#if defined(__arch64__) || defined(__LONG_DOUBLE_128__)
79#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
80#else
81#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
82#endif
83
84/* Definitions for 64-bit SPARC running systems with ELF. */
85
86#undef  TARGET_VERSION
87#define TARGET_VERSION fprintf (stderr, " (FreeBSD/sparc64 ELF)");
88
89#define TARGET_ELF		1
90
91/* XXX */
92/* A 64 bit v9 compiler with stack-bias,
93   in a Medium/mid code model environment.  */
94
95#undef  TARGET_DEFAULT
96#define TARGET_DEFAULT \
97  (MASK_V9 + MASK_64BIT + MASK_PTR64 /* + MASK_FASTER_STRUCTS */ \
98   + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU \
99   + MASK_LONG_DOUBLE_128 /* + MASK_HARD_QUAD */)
100
101/* The default code model.  */
102#undef  SPARC_DEFAULT_CMODEL
103#define SPARC_DEFAULT_CMODEL	CM_MEDLOW
104
105#define ENABLE_EXECUTE_STACK						\
106  static int need_enable_exec_stack;					\
107  static void check_enabling(void) __attribute__ ((constructor));	\
108  static void check_enabling(void)					\
109  {									\
110    extern int sysctlbyname(const char *, void *, size_t *, void *, size_t);\
111    int prot = 0;							\
112    size_t len = sizeof(prot);						\
113									\
114    sysctlbyname ("kern.stackprot", &prot, &len, NULL, 0);		\
115    if (prot != 7)							\
116      need_enable_exec_stack = 1;					\
117  }									\
118  extern void __enable_execute_stack (void *);				\
119  void __enable_execute_stack (void *addr)				\
120  {									\
121    if (!need_enable_exec_stack)					\
122      return;								\
123    else {								\
124      /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ 			\
125      if (mprotect (addr, TRAMPOLINE_SIZE, 7) < 0)			\
126        perror ("mprotect of trampoline code");				\
127    }									\
128  }
129
130
131/************************[  Assembler stuff  ]********************************/
132
133#undef	LOCAL_LABEL_PREFIX
134#define LOCAL_LABEL_PREFIX  "."
135
136/* XXX2 */
137/* This is how to store into the string LABEL
138   the symbol_ref name of an internal numbered label where
139   PREFIX is the class of label and NUM is the number within the class.
140   This is suitable for output with `assemble_name'.  */
141
142#undef  ASM_GENERATE_INTERNAL_LABEL
143#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)			\
144  sprintf (LABEL, "*.L%s%lu", PREFIX, (unsigned long)(NUM))
145
146
147/************************[  Debugger stuff  ]*********************************/
148
149/* This is the char to use for continuation (in case we need to turn
150   continuation back on).  */
151
152#undef  DBX_CONTIN_CHAR
153#define DBX_CONTIN_CHAR	'?'
154
155/* DWARF bits.  */
156
157/* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
158   Obviously the Dwarf2 folks havn't tried to actually build systems
159   with their spec.  On a 64-bit system, only 64-bit relocs become
160   RELATIVE relocations.  */
161
162/* #define DWARF_OFFSET_SIZE PTR_SIZE */
163
164#undef ENDFILE_SPEC
165#define ENDFILE_SPEC						\
166  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} "	\
167  FBSD_ENDFILE_SPEC
168
169/* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
170#undef CTORS_SECTION_ASM_OP
171#undef DTORS_SECTION_ASM_OP
172