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 value, char ***argv, int *last)
87 *last += EXPAND_ARGV_RATE;
88 *argv = (char **) xrealloc (*argv, (*last) * sizeof (char *));
91 size = WS2SC (NULL, value, 0);
92 (*argv)[*index] = (char *) xmalloc (size + 1);
93 WS2SC ((*argv)[*index], value, size);
100 __gnat_initialize (void *eh)
102 /* Initialize floating-point coprocessor. This call is needed because
103 the MS libraries default to 64-bit precision instead of 80-bit
104 precision, and we require the full precision for proper operation,
105 given that we have set Max_Digits etc with this in mind */
106 __gnat_init_float ();
108 #ifdef GNAT_UNICODE_SUPPORT
109 /* Set current code page for filenames handling. */
111 char *codepage = getenv ("GNAT_CODE_PAGE");
113 /* Default code page is UTF-8. */
114 CurrentCodePage = CP_UTF8;
116 if (codepage != NULL)
117 if (strcmp (codepage, "CP_ACP") == 0)
118 CurrentCodePage = CP_ACP;
119 else if (strcmp (codepage, "CP_UTF8") == 0)
120 CurrentCodePage = CP_UTF8;
123 /* Adjust gnat_argv to support Unicode characters. */
129 int argc_expanded = 0;
130 TCHAR result [MAX_PATH];
132 wargv = CommandLineToArgvW (GetCommandLineW(), &wargc);
136 /* Set gnat_argv with arguments encoded in UTF-8. */
138 gnat_argv = (char **) xmalloc ((last) * sizeof (char *));
140 /* argv[0] is the executable full path-name. */
142 SearchPath (NULL, wargv[0], _T(".exe"), MAX_PATH, result, NULL);
143 append_arg (&argc_expanded, result, &gnat_argv, &last);
145 for (k=1; k<wargc; k++)
147 /* Check for wildcard expansion. */
148 if (_tcsstr (wargv[k], _T("?")) != 0 ||
149 _tcsstr (wargv[k], _T("*")) != 0)
151 /* Wilcards are present, append all corresponding matches. */
152 WIN32_FIND_DATA FileData;
153 HANDLE hDir = FindFirstFile (wargv[k], &FileData);
155 if (hDir == INVALID_HANDLE_VALUE)
157 /* No match, append arg as-is. */
158 append_arg (&argc_expanded, wargv[k], &gnat_argv, &last);
162 /* Append first match and all remaining ones. */
165 append_arg (&argc_expanded,
166 FileData.cFileName, &gnat_argv, &last);
167 } while (FindNextFile (hDir, &FileData));
174 /* No wildcard. Store parameter as-is. */
175 append_arg (&argc_expanded, wargv[k], &gnat_argv, &last);
180 gnat_argc = argc_expanded;
181 gnat_argv = (char **) xrealloc
182 (gnat_argv, argc_expanded * sizeof (char *));
187 /* Note that we do not activate this for the compiler itself to avoid a
188 bootstrap path problem. Older version of gnatbind will generate a call
189 to __gnat_initialize() without argument. Therefore we cannot use eh in
190 this case. It will be possible to remove the following #ifdef at some
193 /* Install the Structured Exception handler. */
195 __gnat_install_SEH_handler (eh);
199 /******************************************/
200 /* __gnat_initialize (init_float version) */
201 /******************************************/
203 #elif defined (__Lynx__) || defined (__FreeBSD__) || defined(__NetBSD__) \
204 || defined (__OpenBSD__)
206 extern void __gnat_init_float (void);
209 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
211 __gnat_init_float ();
214 /***************************************/
215 /* __gnat_initialize (VxWorks Version) */
216 /***************************************/
218 #elif defined(__vxworks)
220 extern void __gnat_init_float (void);
223 __gnat_initialize (void *eh)
225 __gnat_init_float ();
227 /* On targets where we use the ZCX scheme, we need to register the frame
228 tables at load/startup time.
230 For applications loaded as a set of "modules", the crtstuff objects
231 linked in (crtbegin.o/end.o) are tailored to provide this service
232 automatically, a-la C++ constructor fashion, triggered by the VxWorks
233 loader thanks to a special variable declaration in crtbegin.o (_ctors).
235 Automatic de-registration is handled symmetrically, a-la C++ destructor
236 fashion (with a _dtors variable also in crtbegin.o) triggered by the
239 Note that since the tables shall be registered against a common
240 data structure, libgcc should be one of the modules (vs being partially
241 linked against all the others at build time) and shall be loaded first.
243 For applications linked with the kernel, the scheme above would lead to
244 duplicated symbols because the VxWorks kernel build "munches" by default,
245 so we link against crtbeginT.o instead of crtbegin.o, which doesn't
246 include the special variables. We know which set of crt objects is used
247 thanks to a boolean indicator present in both sets (__module_has_ctors),
248 and directly call the appropriate function here in the not-automatic
249 case. We'll never unload that, so there is no de-registration to worry
252 For whole applications loaded as a single module, we may use one scheme
253 or the other, except for the mixed Ada/C++ case in which the first scheme
254 would fail for the same reason as in the linked-with-kernel situation.
256 Selecting the crt set with the ctors/dtors capabilities (first scheme
257 above) is triggered by adding "-dynamic" to the gcc *link* command line
258 options. Selecting the other set is achieved by using "-static" instead.
260 This is a first approach, tightly synchronized with a number of GCC
261 configuration and crtstuff changes. We need to ensure that those changes
262 are there to activate this circuitry. */
264 #if (__GNUC__ >= 3) && (defined (_ARCH_PPC) || defined (__ppc))
266 /* The scheme described above is only useful for the actual ZCX case, and
267 we don't want any reference to the crt provided symbols otherwise. We
268 may not link with any of the crt objects in the non-ZCX case, e.g. from
269 documented procedures instructing the use of -nostdlib, and references
270 to the ctors symbols here would just remain unsatisfied.
272 We have no way to avoid those references in the right conditions in this
273 C module, because we have nothing like a IN_ZCX_RTS macro. This aspect
274 is then deferred to an Ada routine, which can do that based on a test
275 against a constant System flag value. */
277 extern void __gnat_vxw_setup_for_eh (void);
278 __gnat_vxw_setup_for_eh ();
283 #elif defined(_T_HPUX10) || (!defined(IN_RTS) && defined(_X_HPUX10))
285 /************************************************/
286 /* __gnat_initialize (PA-RISC HP-UX 10 Version) */
287 /************************************************/
289 extern void __main (void);
292 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)
299 /* For all other versions of GNAT, the initialize routine and handler
300 installation do nothing */
302 /***************************************/
303 /* __gnat_initialize (Default Version) */
304 /***************************************/
307 __gnat_initialize (void *eh ATTRIBUTE_UNUSED)