1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
5 * I N I T I A L I Z E *
7 * C Implementation File *
9 * Copyright (C) 1992-2009, Free Software Foundation, Inc. *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 3, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. *
18 * As a special exception under Section 7 of GPL version 3, you are granted *
19 * additional permissions described in the GCC Runtime Library Exception, *
20 * version 3.1, as published by the Free Software Foundation. *
22 * You should have received a copy of the GNU General Public License and *
23 * a copy of the GCC Runtime Library Exception along with this program; *
24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
25 * <http://www.gnu.org/licenses/>. *
27 * GNAT was originally developed by the GNAT team at New York University. *
28 * Extensive contributions were provided by Ada Core Technologies Inc. *
30 ****************************************************************************/
32 /* This unit provides default implementation for __gnat_initialize ()
33 which is called before the elaboration of the partition. It is provided
34 in a separate file/object so that users can replace it easily.
35 The default implementation should be null on most targets. */
37 /* The following include is here to meet the published VxWorks requirement
38 that the __vxworks header appear before any other include. */
46 /* We don't have libiberty, so use malloc. */
47 #define xmalloc(S) malloc (S)
48 #define xrealloc(V,S) realloc (V,S)
56 /******************************************/
57 /* __gnat_initialize (NT-mingw32 Version) */
58 /******************************************/
60 #if defined (__MINGW32__)
64 extern void __gnat_init_float (void);
65 extern void __gnat_install_SEH_handler (void *);
68 extern char **gnat_argv
;
70 #ifdef GNAT_UNICODE_SUPPORT
72 #define EXPAND_ARGV_RATE 128
75 append_arg (int *index
, LPWSTR dir
, LPWSTR value
,
76 char ***argv
, int *last
, int quoted
)
80 int vallen
= _tcslen (value
);
87 fullvalue
= xmalloc ((vallen
+ 1) * sizeof(TCHAR
));
92 dirlen
= _tcslen (dir
);
94 fullvalue
= xmalloc ((dirlen
+ vallen
+ 1) * sizeof(TCHAR
));
95 _tcscpy (fullvalue
, dir
);
102 _tcsncpy (fullvalue
+ dirlen
, value
+ 1, vallen
- 1);
103 fullvalue
[dirlen
+ vallen
- sizeof(TCHAR
)] = _T('\0');
106 _tcscpy (fullvalue
+ dirlen
, value
);
110 *last
+= EXPAND_ARGV_RATE
;
111 *argv
= (char **) xrealloc (*argv
, (*last
) * sizeof (char *));
114 size
= WS2SC (NULL
, fullvalue
, 0);
115 (*argv
)[*index
] = (char *) xmalloc (size
+ sizeof(TCHAR
));
116 WS2SC ((*argv
)[*index
], fullvalue
, size
);
125 __gnat_initialize (void *eh ATTRIBUTE_UNUSED
)
127 /* Initialize floating-point coprocessor. This call is needed because
128 the MS libraries default to 64-bit precision instead of 80-bit
129 precision, and we require the full precision for proper operation,
130 given that we have set Max_Digits etc with this in mind */
131 __gnat_init_float ();
133 #ifdef GNAT_UNICODE_SUPPORT
134 /* Set current code page for filenames handling. */
136 char *codepage
= getenv ("GNAT_CODE_PAGE");
138 /* Default code page is UTF-8. */
139 CurrentCodePage
= CP_UTF8
;
141 if (codepage
!= NULL
)
143 if (strcmp (codepage
, "CP_ACP") == 0)
144 CurrentCodePage
= CP_ACP
;
145 else if (strcmp (codepage
, "CP_UTF8") == 0)
146 CurrentCodePage
= CP_UTF8
;
150 /* Adjust gnat_argv to support Unicode characters. */
156 int argc_expanded
= 0;
157 TCHAR result
[MAX_PATH
];
160 wargv
= CommandLineToArgvW (GetCommandLineW(), &wargc
);
164 /* Set gnat_argv with arguments encoded in UTF-8. */
166 gnat_argv
= (char **) xmalloc ((last
) * sizeof (char *));
168 /* argv[0] is the executable full path-name. */
170 SearchPath (NULL
, wargv
[0], _T(".exe"), MAX_PATH
, result
, NULL
);
171 append_arg (&argc_expanded
, NULL
, result
, &gnat_argv
, &last
, 0);
173 for (k
=1; k
<wargc
; k
++)
175 quoted
= (wargv
[k
][0] == _T('\''));
177 /* Check for wildcard expansion if the argument is not quoted. */
179 && (_tcsstr (wargv
[k
], _T("?")) != 0 ||
180 _tcsstr (wargv
[k
], _T("*")) != 0))
182 /* Wilcards are present, append all corresponding matches. */
183 WIN32_FIND_DATA FileData
;
184 HANDLE hDir
= FindFirstFile (wargv
[k
], &FileData
);
186 LPWSTR ldir
= _tcsrchr (wargv
[k
], _T('\\'));
189 ldir
= _tcsrchr (wargv
[k
], _T('/'));
191 if (hDir
== INVALID_HANDLE_VALUE
)
193 /* No match, append arg as-is. */
194 append_arg (&argc_expanded
, NULL
, wargv
[k
],
195 &gnat_argv
, &last
, quoted
);
201 int n
= ldir
- wargv
[k
] + 1;
202 dir
= xmalloc ((n
+ 1) * sizeof (TCHAR
));
203 _tcsncpy (dir
, wargv
[k
], n
);
207 /* Append first match and all remaining ones. */
210 /* Do not add . and .. special entries */
212 if (_tcscmp (FileData
.cFileName
, _T(".")) != 0
213 && _tcscmp (FileData
.cFileName
, _T("..")) != 0)
214 append_arg (&argc_expanded
, dir
, FileData
.cFileName
,
215 &gnat_argv
, &last
, 0);
216 } while (FindNextFile (hDir
, &FileData
));
226 /* No wildcard. Store parameter as-is. Remove quote if
228 append_arg (&argc_expanded
, NULL
, wargv
[k
],
229 &gnat_argv
, &last
, quoted
);
234 gnat_argc
= argc_expanded
;
235 gnat_argv
= (char **) xrealloc
236 (gnat_argv
, argc_expanded
* sizeof (char *));
241 /* Note that we do not activate this for the compiler itself to avoid a
242 bootstrap path problem. Older version of gnatbind will generate a call
243 to __gnat_initialize() without argument. Therefore we cannot use eh in
244 this case. It will be possible to remove the following #ifdef at some
247 /* Install the Structured Exception handler. */
249 __gnat_install_SEH_handler (eh
);
253 /******************************************/
254 /* __gnat_initialize (init_float version) */
255 /******************************************/
257 #elif defined (__Lynx__) || defined (__FreeBSD__) || defined(__NetBSD__) \
258 || defined (__OpenBSD__)
260 extern void __gnat_init_float (void);
263 __gnat_initialize (void *eh ATTRIBUTE_UNUSED
)
265 __gnat_init_float ();
268 /***************************************/
269 /* __gnat_initialize (VxWorks Version) */
270 /***************************************/
272 #elif defined(__vxworks)
274 extern void __gnat_init_float (void);
277 __gnat_initialize (void *eh
)
279 __gnat_init_float ();
281 /* On targets where we use the ZCX scheme, we need to register the frame
282 tables at load/startup time.
284 For applications loaded as a set of "modules", the crtstuff objects
285 linked in (crtbegin.o/end.o) are tailored to provide this service
286 automatically, a-la C++ constructor fashion, triggered by the VxWorks
287 loader thanks to a special variable declaration in crtbegin.o (_ctors).
289 Automatic de-registration is handled symmetrically, a-la C++ destructor
290 fashion (with a _dtors variable also in crtbegin.o) triggered by the
293 Note that since the tables shall be registered against a common
294 data structure, libgcc should be one of the modules (vs being partially
295 linked against all the others at build time) and shall be loaded first.
297 For applications linked with the kernel, the scheme above would lead to
298 duplicated symbols because the VxWorks kernel build "munches" by default,
299 so we link against crtbeginT.o instead of crtbegin.o, which doesn't
300 include the special variables. We know which set of crt objects is used
301 thanks to a boolean indicator present in both sets (__module_has_ctors),
302 and directly call the appropriate function here in the not-automatic
303 case. We'll never unload that, so there is no de-registration to worry
306 For whole applications loaded as a single module, we may use one scheme
307 or the other, except for the mixed Ada/C++ case in which the first scheme
308 would fail for the same reason as in the linked-with-kernel situation.
310 The crt set selection is controlled by command line options via GCC's
311 STARTFILE_SPEC in rs6000/vxworks.h. This is tightly synchronized with a
312 number of other GCC configuration and crtstuff changes, and we need to
313 ensure that those changes are there to activate this circuitry. */
315 #if (__GNUC__ >= 3) && (defined (_ARCH_PPC) || defined (__ppc))
317 /* The scheme described above is only useful for the actual ZCX case, and
318 we don't want any reference to the crt provided symbols otherwise. We
319 may not link with any of the crt objects in the non-ZCX case, e.g. from
320 documented procedures instructing the use of -nostdlib, and references
321 to the ctors symbols here would just remain unsatisfied.
323 We have no way to avoid those references in the right conditions in this
324 C module, because we have nothing like a IN_ZCX_RTS macro. This aspect
325 is then deferred to an Ada routine, which can do that based on a test
326 against a constant System flag value. */
328 extern void __gnat_vxw_setup_for_eh (void);
329 __gnat_vxw_setup_for_eh ();
334 #elif defined(_T_HPUX10) || (!defined(IN_RTS) && defined(_X_HPUX10))
336 /************************************************/
337 /* __gnat_initialize (PA-RISC HP-UX 10 Version) */
338 /************************************************/
340 extern void __main (void);
343 __gnat_initialize (void *eh ATTRIBUTE_UNUSED
)
350 /* For all other versions of GNAT, the initialize routine and handler
351 installation do nothing */
353 /***************************************/
354 /* __gnat_initialize (Default Version) */
355 /***************************************/
358 __gnat_initialize (void *eh ATTRIBUTE_UNUSED
)