sol2.h revision 302408 
1/* Operating system specific defines to be used when targeting GCC for any
2   Solaris 2 system.
3   Copyright 2002, 2003, 2004 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/* We use stabs-in-elf for debugging, because that is what the native
23   toolchain uses.  */
24#undef PREFERRED_DEBUGGING_TYPE
25#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
26
27/* Solaris 2 (at least as of 2.5.1) uses a 32-bit wchar_t.  */
28#undef WCHAR_TYPE
29#define WCHAR_TYPE "long int"
30
31#undef WCHAR_TYPE_SIZE
32#define WCHAR_TYPE_SIZE BITS_PER_WORD
33
34/* Solaris 2 uses a wint_t different from the default. This is required
35   by the SCD 2.4.1, p. 6-83, Figure 6-66.  */
36#undef	WINT_TYPE
37#define	WINT_TYPE "long int"
38
39#undef	WINT_TYPE_SIZE
40#define	WINT_TYPE_SIZE BITS_PER_WORD
41
42#define TARGET_HANDLE_PRAGMA_REDEFINE_EXTNAME 1
43
44/* ??? Note: in order for -compat-bsd to work fully,
45   we must somehow arrange to fixincludes /usr/ucbinclude
46   and put the result in $(libsubdir)/ucbinclude.  */
47
48#undef CPP_SUBTARGET_SPEC
49#define CPP_SUBTARGET_SPEC "\
50%{pthreads|pthread:-D_REENTRANT -D_PTHREADS} \
51%{!pthreads:%{!pthread:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}}} \
52%{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
53"
54
55/* Names to predefine in the preprocessor for this target machine.  */
56#define TARGET_SUB_OS_CPP_BUILTINS()
57#define TARGET_OS_CPP_BUILTINS()			\
58    do {						\
59	builtin_define_std ("unix");			\
60	builtin_define_std ("sun");			\
61	builtin_define ("__svr4__");			\
62	builtin_define ("__SVR4");			\
63	builtin_assert ("system=unix");			\
64	builtin_assert ("system=svr4");			\
65	/* For C++ we need to add some additional macro	\
66	   definitions required by the C++ standard	\
67	   library.  */					\
68	if (c_dialect_cxx ())				\
69	  {						\
70	    builtin_define ("_XOPEN_SOURCE=500");	\
71	    builtin_define ("_LARGEFILE_SOURCE=1");	\
72	    builtin_define ("_LARGEFILE64_SOURCE=1");	\
73	    builtin_define ("__EXTENSIONS__");		\
74	  }						\
75	TARGET_SUB_OS_CPP_BUILTINS();			\
76    } while (0)
77
78/* The system headers under Solaris 2 are C++-aware since 2.0.  */
79#define NO_IMPLICIT_EXTERN_C
80
81/* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
82   It's safe to pass -s always, even if -g is not used.  */
83#undef ASM_SPEC
84#define ASM_SPEC "\
85%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
86%{fpic|fpie|fPIC|fPIE:-K PIC} \
87%(asm_cpu) \
88"
89
90/* We don't use the standard LIB_SPEC only because we don't yet support c++.  */
91#undef LIB_SPEC
92#define LIB_SPEC \
93  "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
94   %{!shared:\
95     %{!symbolic:\
96       %{pthreads|pthread:-lpthread} \
97       %{!pthreads:%{!pthread:%{threads:-lthread}}} \
98       %{p|pg:-ldl} -lc}}"
99
100#undef  ENDFILE_SPEC
101#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
102
103/* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
104#undef STARTFILE_SPEC
105#define STARTFILE_SPEC "%{!shared: \
106			 %{!symbolic: \
107			  %{p:mcrt1.o%s} \
108                          %{!p: \
109	                    %{pg:gcrt1.o%s gmon.o%s} \
110                            %{!pg:crt1.o%s}}}} \
111			crti.o%s %(startfile_arch) \
112			crtbegin.o%s"
113
114#undef STARTFILE_ARCH32_SPEC
115#define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
116			    %{!ansi:values-Xa.o%s}"
117
118#undef STARTFILE_ARCH_SPEC
119#define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
120
121#undef LINK_ARCH32_SPEC_BASE
122#define LINK_ARCH32_SPEC_BASE \
123  "%{G:-G} \
124   %{YP,*} \
125   %{R*} \
126   %{compat-bsd: \
127     %{!YP,*:%{p|pg:-Y P,/usr/ucblib:/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
128             %{!p:%{!pg:-Y P,/usr/ucblib:/usr/ccs/lib:/usr/lib}}} \
129             -R /usr/ucblib} \
130   %{!compat-bsd: \
131     %{!YP,*:%{p|pg:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
132             %{!p:%{!pg:-Y P,/usr/ccs/lib:/usr/lib}}}}"
133
134#undef LINK_ARCH32_SPEC
135#define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
136
137#undef LINK_ARCH_SPEC
138#define LINK_ARCH_SPEC LINK_ARCH32_SPEC
139
140/* This should be the same as in svr4.h, except with -R added.  */
141#undef  LINK_SPEC
142#define LINK_SPEC \
143  "%{h*} %{v:-V} \
144   %{b} \
145   %{static:-dn -Bstatic} \
146   %{shared:-G -dy %{!mimpure-text:-z text}} \
147   %{symbolic:-Bsymbolic -G -dy -z text} \
148   %(link_arch) \
149   %{Qy:} %{!Qn:-Qy}"
150
151/* The Solaris linker doesn't understand constructor priorities.  (The
152   GNU linker does support constructor priorities, so GNU ld
153   configuration files for Solaris override this setting.)  */
154#undef SUPPORTS_INIT_PRIORITY
155#define SUPPORTS_INIT_PRIORITY 0
156
157/* This defines which switch letters take arguments.
158   It is as in svr4.h but with -R added.  */
159#undef SWITCH_TAKES_ARG
160#define SWITCH_TAKES_ARG(CHAR) \
161  (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
162   || (CHAR) == 'R' \
163   || (CHAR) == 'h' \
164   || (CHAR) == 'z')
165
166#define STDC_0_IN_SYSTEM_HEADERS 1
167
168/*
169 * Attempt to turn on access permissions for the stack.
170 *
171 * _SC_STACK_PROT is only defined for post 2.6, but we want this code
172 * to run always.  2.6 can change the stack protection but has no way to
173 * query it.
174 *
175 */
176
177/* sys/mman.h is not present on some non-Solaris configurations
178   that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
179   number instead of the appropriate PROT_* flags.  */
180
181#define ENABLE_EXECUTE_STACK					\
182									\
183/* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */	\
184									\
185static int need_enable_exec_stack;					\
186									\
187static void check_enabling(void) __attribute__ ((constructor));		\
188static void check_enabling(void)					\
189{									\
190  extern long sysconf(int);						\
191									\
192  int prot = (int) sysconf(515 /* _SC_STACK_PROT */);			\
193  if (prot != 7 /* STACK_PROT_RWX */)					\
194    need_enable_exec_stack = 1;						\
195}									\
196									\
197extern void __enable_execute_stack (void *);				\
198void									\
199__enable_execute_stack (void *addr)					\
200{									\
201  extern int mprotect(void *, size_t, int);				\
202  if (!need_enable_exec_stack)						\
203    return;								\
204  else {								\
205    long size = getpagesize ();						\
206    long mask = ~(size-1);						\
207    char *page = (char *) (((long) addr) & mask); 			\
208    char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
209									\
210    if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)	\
211      perror ("mprotect of trampoline code");				\
212  }									\
213}
214
215/* Support Solaris-specific format checking for cmn_err.  */
216#define TARGET_N_FORMAT_TYPES 1
217#define TARGET_FORMAT_TYPES solaris_format_types
218
219/* #pragma init and #pragma fini are implemented on top of init and
220   fini attributes.  */
221#define SOLARIS_ATTRIBUTE_TABLE						\
222  { "init",      0, 0, true,  false,  false, NULL },			\
223  { "fini",      0, 0, true,  false,  false, NULL }
224
225/* This is how to declare the size of a function.  For Solaris, we output
226   any .init or .fini entries here.  */
227#undef ASM_DECLARE_FUNCTION_SIZE
228#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)		\
229  do								\
230    {								\
231      if (!flag_inhibit_size_directive)				\
232	ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);			\
233      solaris_output_init_fini (FILE, DECL);			\
234    }								\
235  while (0)
236
237/* Register the Solaris-specific #pragma directives.  */
238#define REGISTER_TARGET_PRAGMAS() solaris_register_pragmas ()
239
240extern GTY(()) tree solaris_pending_aligns;
241extern GTY(()) tree solaris_pending_inits;
242extern GTY(()) tree solaris_pending_finis;
243
244/* Allow macro expansion in #pragma pack.  */
245#define HANDLE_PRAGMA_PACK_WITH_EXPANSION
246