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[pf3gnuchains/gcc-fork.git] / gcc / config / sol2.h
1 /* Operating system specific defines to be used when targeting GCC for any
2    Solaris 2 system.
3    Copyright 2002, 2003, 2004, 2007, 2008, 2009, 2010
4    Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
12
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3.  If not see
20 <http://www.gnu.org/licenses/>.  */
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 SIG_ATOMIC_TYPE "int"
43
44 /* ??? This definition of int8_t follows the system header but does
45    not conform to C99.  Likewise int_fast8_t, int_least8_t.  */
46 #define INT8_TYPE "char"
47 #define INT16_TYPE "short int"
48 #define INT32_TYPE "int"
49 #define INT64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
50 #define UINT8_TYPE "unsigned char"
51 #define UINT16_TYPE "short unsigned int"
52 #define UINT32_TYPE "unsigned int"
53 #define UINT64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
54
55 #define INT_LEAST8_TYPE "char"
56 #define INT_LEAST16_TYPE "short int"
57 #define INT_LEAST32_TYPE "int"
58 #define INT_LEAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
59 #define UINT_LEAST8_TYPE "unsigned char"
60 #define UINT_LEAST16_TYPE "short unsigned int"
61 #define UINT_LEAST32_TYPE "unsigned int"
62 #define UINT_LEAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
63
64 #define INT_FAST8_TYPE "char"
65 #define INT_FAST16_TYPE "int"
66 #define INT_FAST32_TYPE "int"
67 #define INT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
68 #define UINT_FAST8_TYPE "unsigned char"
69 #define UINT_FAST16_TYPE "unsigned int"
70 #define UINT_FAST32_TYPE "unsigned int"
71 #define UINT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
72
73 #define INTPTR_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "int")
74 #define UINTPTR_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "unsigned int")
75
76 /* ??? Note: in order for -compat-bsd to work fully,
77    we must somehow arrange to fixincludes /usr/ucbinclude
78    and put the result in $(libsubdir)/ucbinclude.  */
79
80 #undef CPP_SUBTARGET_SPEC
81 #define CPP_SUBTARGET_SPEC "\
82 %{pthreads|pthread:-D_REENTRANT -D_PTHREADS} \
83 %{!pthreads:%{!pthread:%{threads:-D_REENTRANT -D_SOLARIS_THREADS}}} \
84 %{compat-bsd:-iwithprefixbefore ucbinclude -I/usr/ucbinclude} \
85 "
86
87 /* Names to predefine in the preprocessor for this target machine.  */
88 #define TARGET_SUB_OS_CPP_BUILTINS()
89 #define TARGET_OS_CPP_BUILTINS()                        \
90     do {                                                \
91         builtin_define_std ("unix");                    \
92         builtin_define_std ("sun");                     \
93         builtin_define ("__svr4__");                    \
94         builtin_define ("__SVR4");                      \
95         builtin_assert ("system=unix");                 \
96         builtin_assert ("system=svr4");                 \
97         /* For C++ we need to add some additional macro \
98            definitions required by the C++ standard     \
99            library.  */                                 \
100         if (c_dialect_cxx ())                           \
101           {                                             \
102             builtin_define ("_XOPEN_SOURCE=500");       \
103             builtin_define ("_LARGEFILE_SOURCE=1");     \
104             builtin_define ("_LARGEFILE64_SOURCE=1");   \
105             builtin_define ("__EXTENSIONS__");          \
106           }                                             \
107         TARGET_SUB_OS_CPP_BUILTINS();                   \
108     } while (0)
109
110 /* The system headers under Solaris 2 are C++-aware since 2.0.  */
111 #define NO_IMPLICIT_EXTERN_C
112
113 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
114    It's safe to pass -s always, even if -g is not used.  */
115 #undef ASM_SPEC
116 #define ASM_SPEC "\
117 %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
118 %{fpic|fpie|fPIC|fPIE:-K PIC} \
119 %(asm_cpu) \
120 "
121
122 /* We don't use the standard LIB_SPEC only because we don't yet support c++.  */
123 #undef LIB_SPEC
124 #define LIB_SPEC \
125   "%{compat-bsd:-lucb -lsocket -lnsl -lelf -laio} \
126    %{!shared:\
127      %{!symbolic:\
128        %{pthreads|pthread:-lpthread} \
129        %{!pthreads:%{!pthread:%{threads:-lthread}}} \
130        %{p|pg:-ldl} -lc}}"
131
132 #undef  ENDFILE_SPEC
133 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
134
135 /* We don't use the standard svr4 STARTFILE_SPEC because it's wrong for us.  */
136 #undef STARTFILE_SPEC
137 #define STARTFILE_SPEC "%{!shared: \
138                          %{!symbolic: \
139                           %{p:mcrt1.o%s} \
140                           %{!p: \
141                             %{pg:gcrt1.o%s gmon.o%s} \
142                             %{!pg:crt1.o%s}}}} \
143                         crti.o%s %(startfile_arch) \
144                         crtbegin.o%s"
145
146 #undef STARTFILE_ARCH32_SPEC
147 #define STARTFILE_ARCH32_SPEC "%{ansi:values-Xc.o%s} \
148                             %{!ansi:values-Xa.o%s}"
149
150 #undef STARTFILE_ARCH_SPEC
151 #define STARTFILE_ARCH_SPEC STARTFILE_ARCH32_SPEC
152
153 #undef LINK_ARCH32_SPEC_BASE
154 #define LINK_ARCH32_SPEC_BASE \
155   "%{G:-G} \
156    %{YP,*} \
157    %{R*} \
158    %{compat-bsd: \
159      %{!YP,*:%{p|pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
160              %{!p:%{!pg:-Y P,%R/usr/ucblib:%R/usr/ccs/lib:%R/usr/lib}}} \
161              -R %R/usr/ucblib} \
162    %{!compat-bsd: \
163      %{!YP,*:%{p|pg:-Y P,%R/usr/ccs/lib/libp:%R/usr/lib/libp:%R/usr/ccs/lib:%R/usr/lib} \
164              %{!p:%{!pg:-Y P,%R/usr/ccs/lib:%R/usr/lib}}}}"
165
166 #undef LINK_ARCH32_SPEC
167 #define LINK_ARCH32_SPEC LINK_ARCH32_SPEC_BASE
168
169 #undef LINK_ARCH_SPEC
170 #define LINK_ARCH_SPEC LINK_ARCH32_SPEC
171
172 /* This should be the same as in svr4.h, except with -R added.  */
173 #undef  LINK_SPEC
174 #define LINK_SPEC \
175   "%{h*} %{v:-V} \
176    %{b} \
177    %{!shared:%{!static:%{rdynamic: " RDYNAMIC_SPEC "}}} \
178    %{static:-dn -Bstatic} \
179    %{shared:-G -dy %{!mimpure-text:-z text}} \
180    %{symbolic:-Bsymbolic -G -dy -z text} \
181    %(link_arch) \
182    %{Qy:} %{!Qn:-Qy}"
183
184 /* With Sun ld, -rdynamic is a no-op.  */
185 #define RDYNAMIC_SPEC ""
186
187 /* The Solaris linker doesn't understand constructor priorities.  (The
188    GNU linker does support constructor priorities, so GNU ld
189    configuration files for Solaris override this setting.)  */
190 #undef SUPPORTS_INIT_PRIORITY
191 #define SUPPORTS_INIT_PRIORITY 0
192
193 /* This defines which switch letters take arguments.
194    It is as in svr4.h but with -R added.  */
195 #undef SWITCH_TAKES_ARG
196 #define SWITCH_TAKES_ARG(CHAR) \
197   (DEFAULT_SWITCH_TAKES_ARG(CHAR) \
198    || (CHAR) == 'R' \
199    || (CHAR) == 'h' \
200    || (CHAR) == 'z')
201
202 #define STDC_0_IN_SYSTEM_HEADERS 1
203 \f
204 /*
205  * Attempt to turn on access permissions for the stack.
206  *
207  * _SC_STACK_PROT is only defined for post 2.6, but we want this code
208  * to run always.  2.6 can change the stack protection but has no way to
209  * query it.
210  *
211  */
212
213 /* sys/mman.h is not present on some non-Solaris configurations
214    that use sol2.h, so ENABLE_EXECUTE_STACK must use a magic
215    number instead of the appropriate PROT_* flags.  */
216
217 #define ENABLE_EXECUTE_STACK                                    \
218                                                                         \
219 /* #define STACK_PROT_RWX (PROT_READ | PROT_WRITE | PROT_EXEC) */       \
220                                                                         \
221 static int need_enable_exec_stack;                                      \
222                                                                         \
223 static void check_enabling(void) __attribute__ ((constructor));         \
224 static void check_enabling(void)                                        \
225 {                                                                       \
226   extern long sysconf(int);                                             \
227                                                                         \
228   int prot = (int) sysconf(515 /* _SC_STACK_PROT */);                   \
229   if (prot != 7 /* STACK_PROT_RWX */)                                   \
230     need_enable_exec_stack = 1;                                         \
231 }                                                                       \
232                                                                         \
233 extern void __enable_execute_stack (void *);                            \
234 void                                                                    \
235 __enable_execute_stack (void *addr)                                     \
236 {                                                                       \
237   extern int mprotect(void *, size_t, int);                             \
238   if (!need_enable_exec_stack)                                          \
239     return;                                                             \
240   else {                                                                \
241     long size = getpagesize ();                                         \
242     long mask = ~(size-1);                                              \
243     char *page = (char *) (((long) addr) & mask);                       \
244     char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
245                                                                         \
246     if (mprotect (page, end - page, 7 /* STACK_PROT_RWX */) < 0)        \
247       perror ("mprotect of trampoline code");                           \
248   }                                                                     \
249 }
250
251 /* Support Solaris-specific format checking for cmn_err.  */
252 #define TARGET_N_FORMAT_TYPES 1
253 #define TARGET_FORMAT_TYPES solaris_format_types
254
255 /* #pragma init and #pragma fini are implemented on top of init and
256    fini attributes.  */
257 #define SOLARIS_ATTRIBUTE_TABLE                                         \
258   { "init",      0, 0, true,  false,  false, NULL },                    \
259   { "fini",      0, 0, true,  false,  false, NULL }
260
261 /* Solaris/x86 as and gas support the common ELF .section/.pushsection
262    syntax.  */
263 #define PUSHSECTION_FORMAT      "\t.pushsection\t%s\n"
264
265 /* This is how to declare the size of a function.  For Solaris, we output
266    any .init or .fini entries here.  */
267 #undef ASM_DECLARE_FUNCTION_SIZE
268 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
269   do                                                            \
270     {                                                           \
271       if (!flag_inhibit_size_directive)                         \
272         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
273       solaris_output_init_fini (FILE, DECL);                    \
274     }                                                           \
275   while (0)
276
277 /* Solaris 'as' has a bug: a .common directive in .tbss section
278    behaves as .tls_common rather than normal non-TLS .common.  */
279 #undef  ASM_OUTPUT_ALIGNED_COMMON
280 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
281   do                                                                    \
282     {                                                                   \
283       if (TARGET_SUN_TLS                                                \
284           && in_section                                                 \
285           && ((in_section->common.flags & (SECTION_TLS | SECTION_BSS))  \
286               == (SECTION_TLS | SECTION_BSS)))                          \
287         switch_to_section (bss_section);                                \
288       fprintf ((FILE), "%s", COMMON_ASM_OP);                            \
289       assemble_name ((FILE), (NAME));                                   \
290       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
291                (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
292     }                                                                   \
293   while (0)
294
295 #ifndef USE_GAS
296 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
297 #define TARGET_ASM_ASSEMBLE_VISIBILITY solaris_assemble_visibility
298 #endif
299
300 extern GTY(()) tree solaris_pending_aligns;
301 extern GTY(()) tree solaris_pending_inits;
302 extern GTY(()) tree solaris_pending_finis;
303
304 /* Allow macro expansion in #pragma pack.  */
305 #define HANDLE_PRAGMA_PACK_WITH_EXPANSION