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;
71 /* Do not define for RTX since it is only used for creating child processes
72 which is not supported in RTX. */
73 extern void __gnat_plist_init (void);
76 #ifdef GNAT_UNICODE_SUPPORT
78 #define EXPAND_ARGV_RATE 128
81 append_arg (int *index, LPWSTR dir, LPWSTR value,
82 char ***argv, int *last, int quoted)
86 int vallen = _tcslen (value);
93 fullvalue = xmalloc ((vallen + 1) * sizeof(TCHAR));
98 dirlen = _tcslen (dir);
100 fullvalue = xmalloc ((dirlen + vallen + 1) * sizeof(TCHAR));
101 _tcscpy (fullvalue, dir);
108 _tcsncpy (fullvalue + dirlen, value + 1, vallen - 1);
109 fullvalue [dirlen + vallen - sizeof(TCHAR)] = _T('\0');
112 _tcscpy (fullvalue + dirlen, value);
116 *last += EXPAND_ARGV_RATE;
117 *argv = (char **) xrealloc (*argv, (*last) * sizeof (char *));
120 size = WS2SC (NULL, fullvalue, 0);
121 (*argv)[*index] = (char *) xmalloc (size + sizeof(TCHAR));
122 WS2SC ((*argv)[*index], fullvalue, size);
131 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
133 /* Initialize floating-point coprocessor. This call is needed because
134 the MS libraries default to 64-bit precision instead of 80-bit
135 precision, and we require the full precision for proper operation,
136 given that we have set Max_Digits etc with this in mind */
137 __gnat_init_float ();
139 #ifdef GNAT_UNICODE_SUPPORT
140 /* Set current code page for filenames handling. */
142 char *codepage = getenv ("GNAT_CODE_PAGE");
144 /* Default code page is UTF-8. */
145 CurrentCodePage = CP_UTF8;
147 if (codepage != NULL)
149 if (strcmp (codepage, "CP_ACP") == 0)
150 CurrentCodePage = CP_ACP;
151 else if (strcmp (codepage, "CP_UTF8") == 0)
152 CurrentCodePage = CP_UTF8;
156 /* Adjust gnat_argv to support Unicode characters. */
162 int argc_expanded = 0;
163 TCHAR result [MAX_PATH];
166 wargv = CommandLineToArgvW (GetCommandLineW(), &wargc);
170 /* Set gnat_argv with arguments encoded in UTF-8. */
172 gnat_argv = (char **) xmalloc ((last) * sizeof (char *));
174 /* argv[0] is the executable full path-name. */
176 SearchPath (NULL, wargv[0], _T(".exe"), MAX_PATH, result, NULL);
177 append_arg (&argc_expanded, NULL, result, &gnat_argv, &last, 0);
179 for (k=1; k<wargc; k++)
181 quoted = (wargv[k][0] == _T('\''));
183 /* Check for wildcard expansion if the argument is not quoted. */
185 && (_tcsstr (wargv[k], _T("?")) != 0 ||
186 _tcsstr (wargv[k], _T("*")) != 0))
188 /* Wilcards are present, append all corresponding matches. */
189 WIN32_FIND_DATA FileData;
190 HANDLE hDir = FindFirstFile (wargv[k], &FileData);
192 LPWSTR ldir = _tcsrchr (wargv[k], _T('\\'));
195 ldir = _tcsrchr (wargv[k], _T('/'));
197 if (hDir == INVALID_HANDLE_VALUE)
199 /* No match, append arg as-is. */
200 append_arg (&argc_expanded, NULL, wargv[k],
201 &gnat_argv, &last, quoted);
207 int n = ldir - wargv[k] + 1;
208 dir = xmalloc ((n + 1) * sizeof (TCHAR));
209 _tcsncpy (dir, wargv[k], n);
213 /* Append first match and all remaining ones. */
216 /* Do not add . and .. special entries */
218 if (_tcscmp (FileData.cFileName, _T(".")) != 0
219 && _tcscmp (FileData.cFileName, _T("..")) != 0)
220 append_arg (&argc_expanded, dir, FileData.cFileName,
221 &gnat_argv, &last, 0);
222 } while (FindNextFile (hDir, &FileData));
232 /* No wildcard. Store parameter as-is. Remove quote if
234 append_arg (&argc_expanded, NULL, wargv[k],
235 &gnat_argv, &last, quoted);
240 gnat_argc = argc_expanded;
241 gnat_argv = (char **) xrealloc
242 (gnat_argv, argc_expanded * sizeof (char *));
247 /* Note that we do not activate this for the compiler itself to avoid a
248 bootstrap path problem. Older version of gnatbind will generate a call
249 to __gnat_initialize() without argument. Therefore we cannot use eh in
250 this case. It will be possible to remove the following #ifdef at some
253 /* Install the Structured Exception handler. */
255 __gnat_install_SEH_handler (eh);
259 /******************************************/
260 /* __gnat_initialize (init_float version) */
261 /******************************************/
263 #elif defined (__Lynx__) || defined (__FreeBSD__) || defined(__NetBSD__) \
264 || defined (__OpenBSD__)
266 extern void __gnat_init_float (void);
269 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
271 __gnat_init_float ();
274 /***************************************/
275 /* __gnat_initialize (VxWorks Version) */
276 /***************************************/
278 #elif defined(__vxworks)
280 extern void __gnat_init_float (void);
283 __gnat_initialize (void *eh)
285 __gnat_init_float ();
287 /* On targets where we use the ZCX scheme, we need to register the frame
288 tables at load/startup time.
290 For applications loaded as a set of "modules", the crtstuff objects
291 linked in (crtbegin.o/end.o) are tailored to provide this service
292 automatically, a-la C++ constructor fashion, triggered by the VxWorks
293 loader thanks to a special variable declaration in crtbegin.o (_ctors).
295 Automatic de-registration is handled symmetrically, a-la C++ destructor
296 fashion (with a _dtors variable also in crtbegin.o) triggered by the
299 Note that since the tables shall be registered against a common
300 data structure, libgcc should be one of the modules (vs being partially
301 linked against all the others at build time) and shall be loaded first.
303 For applications linked with the kernel, the scheme above would lead to
304 duplicated symbols because the VxWorks kernel build "munches" by default,
305 so we link against crtbeginT.o instead of crtbegin.o, which doesn't
306 include the special variables. We know which set of crt objects is used
307 thanks to a boolean indicator present in both sets (__module_has_ctors),
308 and directly call the appropriate function here in the not-automatic
309 case. We'll never unload that, so there is no de-registration to worry
312 For whole applications loaded as a single module, we may use one scheme
313 or the other, except for the mixed Ada/C++ case in which the first scheme
314 would fail for the same reason as in the linked-with-kernel situation.
316 Selecting the crt set with the ctors/dtors capabilities (first scheme
317 above) is triggered by adding "-dynamic" to the gcc *link* command line
318 options. Selecting the other set is achieved by using "-static" instead.
320 This is a first approach, tightly synchronized with a number of GCC
321 configuration and crtstuff changes. We need to ensure that those changes
322 are there to activate this circuitry. */
324 #if (__GNUC__ >= 3) && (defined (_ARCH_PPC) || defined (__ppc))
326 /* The scheme described above is only useful for the actual ZCX case, and
327 we don't want any reference to the crt provided symbols otherwise. We
328 may not link with any of the crt objects in the non-ZCX case, e.g. from
329 documented procedures instructing the use of -nostdlib, and references
330 to the ctors symbols here would just remain unsatisfied.
332 We have no way to avoid those references in the right conditions in this
333 C module, because we have nothing like a IN_ZCX_RTS macro. This aspect
334 is then deferred to an Ada routine, which can do that based on a test
335 against a constant System flag value. */
337 extern void __gnat_vxw_setup_for_eh (void);
338 __gnat_vxw_setup_for_eh ();
343 #elif defined(_T_HPUX10) || (!defined(IN_RTS) && defined(_X_HPUX10))
345 /************************************************/
346 /* __gnat_initialize (PA-RISC HP-UX 10 Version) */
347 /************************************************/
349 extern void __main (void);
352 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
359 /* For all other versions of GNAT, the initialize routine and handler
360 installation do nothing */
362 /***************************************/
363 /* __gnat_initialize (Default Version) */
364 /***************************************/
367 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)