1/* Base configuration file for all NetBSD targets.
2   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
3   Free Software Foundation, Inc.
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/* TARGET_OS_CPP_BUILTINS() common to all NetBSD targets.  */
23#define NETBSD_OS_CPP_BUILTINS_COMMON()		\
24  do						\
25    {						\
26      builtin_define ("__NetBSD__");		\
27      builtin_define ("__unix__");		\
28      builtin_assert ("system=bsd");		\
29      builtin_assert ("system=unix");		\
30      builtin_assert ("system=NetBSD");		\
31    }						\
32  while (0)
33
34/* CPP_SPEC parts common to all NetBSD targets.  */
35#define NETBSD_CPP_SPEC				\
36  "%{posix:-D_POSIX_SOURCE} \
37   %{pthread:-D_REENTRANT -D_PTHREADS}"
38
39/* NETBSD_NATIVE is defined when gcc is integrated into the NetBSD
40   source tree so it can be configured appropriately without using
41   the GNU configure/build mechanism.  */
42
43#ifdef NETBSD_NATIVE
44
45/* Look for the include files in the system-defined places.  */
46
47#undef GPLUSPLUS_INCLUDE_DIR
48#define GPLUSPLUS_INCLUDE_DIR "/usr/include/g++"
49
50#undef GCC_INCLUDE_DIR
51#define GCC_INCLUDE_DIR "/usr/include"
52
53#undef INCLUDE_DEFAULTS
54#define INCLUDE_DEFAULTS			\
55  {						\
56    { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 },	\
57    { GCC_INCLUDE_DIR, "GCC", 0, 0 },		\
58    { 0, 0, 0, 0 }				\
59  }
60
61/* Under NetBSD, the normal location of the compiler back ends is the
62   /usr/libexec directory.  */
63
64#undef STANDARD_EXEC_PREFIX
65#define STANDARD_EXEC_PREFIX		"/usr/libexec/"
66
67/* Under NetBSD, the normal location of the various *crt*.o files is the
68   /usr/lib directory.  */
69
70#undef STANDARD_STARTFILE_PREFIX
71#define STANDARD_STARTFILE_PREFIX	"/usr/lib/"
72
73#endif /* NETBSD_NATIVE */
74
75
76/* Provide a LIB_SPEC appropriate for NetBSD.  Here we:
77
78   1. Select the appropriate set of libs, depending on whether we're
79      profiling.
80
81   2. Include the pthread library if -pthread is specified (only
82      if threads are enabled).
83
84   3. Include the posix library if -posix is specified.
85
86   FIXME: Could eliminate the duplication here if we were allowed to
87   use string concatenation.  */
88
89#ifdef NETBSD_ENABLE_PTHREADS
90#define NETBSD_LIB_SPEC		\
91  "%{pthread:			\
92     %{!p:			\
93       %{!pg:-lpthread}}	\
94     %{p:-lpthread_p}		\
95     %{pg:-lpthread_p}}		\
96   %{posix:			\
97     %{!p:			\
98       %{!pg:-lposix}}		\
99     %{p:-lposix_p}		\
100     %{pg:-lposix_p}}		\
101   %{!shared:			\
102     %{!symbolic:		\
103       %{!p:			\
104	 %{!pg:-lc}}		\
105       %{p:-lc_p}		\
106       %{pg:-lc_p}}}"
107#else
108#define NETBSD_LIB_SPEC		\
109  "%{posix:			\
110     %{!p:			\
111       %{!pg:-lposix}}		\
112     %{p:-lposix_p}		\
113     %{pg:-lposix_p}}		\
114   %{!shared:			\
115     %{!symbolic:		\
116       %{!p:			\
117	 %{!pg:-lc}}		\
118       %{p:-lc_p}		\
119       %{pg:-lc_p}}}"
120#endif
121
122#undef LIB_SPEC
123#define LIB_SPEC NETBSD_LIB_SPEC
124
125/* Provide a LIBGCC_SPEC appropriate for NetBSD.  We also want to exclude
126   libgcc with -symbolic.  */
127
128#ifdef NETBSD_NATIVE
129#define NETBSD_LIBGCC_SPEC	\
130  "%{!symbolic:			\
131     %{!shared:			\
132       %{!p:			\
133	 %{!pg: -lgcc}}}	\
134     %{shared: -lgcc_pic}	\
135     %{p: -lgcc_p}		\
136     %{pg: -lgcc_p}}"
137#else
138#define NETBSD_LIBGCC_SPEC "%{!shared:%{!symbolic: -lgcc}}"
139#endif
140
141#undef LIBGCC_SPEC
142#define LIBGCC_SPEC NETBSD_LIBGCC_SPEC
143
144/* When building shared libraries, the initialization and finalization
145   functions for the library are .init and .fini respectively.  */
146
147#define COLLECT_SHARED_INIT_FUNC(STREAM,FUNC)				\
148  do {									\
149    fprintf ((STREAM), "void __init() __asm__ (\".init\");");		\
150    fprintf ((STREAM), "void __init() {\n\t%s();\n}\n", (FUNC));	\
151  } while (0)
152
153#define COLLECT_SHARED_FINI_FUNC(STREAM,FUNC)				\
154  do {									\
155    fprintf ((STREAM), "void __fini() __asm__ (\".fini\");");		\
156    fprintf ((STREAM), "void __fini() {\n\t%s();\n}\n", (FUNC));	\
157  } while (0)
158
159#undef TARGET_POSIX_IO
160#define TARGET_POSIX_IO
161
162/* Handle #pragma weak and #pragma pack.  */
163
164#define HANDLE_SYSV_PRAGMA 1
165
166/* Don't assume anything about the header files.  */
167#undef  NO_IMPLICIT_EXTERN_C
168#define NO_IMPLICIT_EXTERN_C    1
169
170/* Define some types that are the same on all NetBSD platforms,
171   making them agree with <machine/ansi.h>.  */
172
173#undef WCHAR_TYPE
174#define WCHAR_TYPE "int"
175
176#undef WCHAR_TYPE_SIZE
177#define WCHAR_TYPE_SIZE 32
178
179#undef WINT_TYPE
180#define WINT_TYPE "int"
181
182
183/* Attempt to turn on execute permission for the stack.  This may be
184   used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
185   if the target machine can change execute permissions on a page).
186
187   There is no way to query the execute permission of the stack, so
188   we always issue the mprotect() call.
189
190   Note that we go out of our way to use namespace-non-invasive calls
191   here.  Unfortunately, there is no libc-internal name for mprotect().
192
193   Also note that no errors should be emitted by this code; it is considered
194   dangerous for library calls to send messages to stdout/stderr.  */
195
196#define NETBSD_ENABLE_EXECUTE_STACK					\
197extern void __enable_execute_stack (void *);				\
198void									\
199__enable_execute_stack (void *addr)					\
200{									\
201  extern int mprotect (void *, size_t, int);				\
202  extern int __sysctl (int *, unsigned int, void *, size_t *,		\
203		       void *, size_t);					\
204									\
205  static int size;							\
206  static long mask;							\
207									\
208  char *page, *end;							\
209									\
210  if (size == 0)							\
211    {									\
212      int mib[2];							\
213      size_t len;							\
214									\
215      mib[0] = 6; /* CTL_HW */						\
216      mib[1] = 7; /* HW_PAGESIZE */					\
217      len = sizeof (size);						\
218      (void) __sysctl (mib, 2, &size, &len, NULL, 0);			\
219      mask = ~((long) size - 1);					\
220    }									\
221									\
222  page = (char *) (((long) addr) & mask);				\
223  end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size);	\
224									\
225  /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */				\
226  (void) mprotect (page, end - page, 7);				\
227}
228