366 lines
12 KiB
C
366 lines
12 KiB
C
/****************************************************************************
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* *
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* GNAT COMPILER COMPONENTS *
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* *
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* I N I T I A L I Z E *
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* *
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* C Implementation File *
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* *
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* Copyright (C) 1992-2009, Free Software Foundation, Inc. *
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* *
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* GNAT is free software; you can redistribute it and/or modify it under *
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* terms of the GNU General Public License as published by the Free Soft- *
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* ware Foundation; either version 3, or (at your option) any later ver- *
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* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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* or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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* As a special exception under Section 7 of GPL version 3, you are granted *
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* additional permissions described in the GCC Runtime Library Exception, *
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* version 3.1, as published by the Free Software Foundation. *
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* *
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* You should have received a copy of the GNU General Public License and *
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* a copy of the GCC Runtime Library Exception along with this program; *
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* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
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* <http://www.gnu.org/licenses/>. *
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* *
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* GNAT was originally developed by the GNAT team at New York University. *
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* Extensive contributions were provided by Ada Core Technologies Inc. *
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* *
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****************************************************************************/
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/* This unit provides default implementation for __gnat_initialize ()
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which is called before the elaboration of the partition. It is provided
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in a separate file/object so that users can replace it easily.
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The default implementation should be null on most targets. */
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/* The following include is here to meet the published VxWorks requirement
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that the __vxworks header appear before any other include. */
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#ifdef __vxworks
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#include "vxWorks.h"
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#endif
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#ifdef IN_RTS
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#include "tconfig.h"
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#include "tsystem.h"
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/* We don't have libiberty, so use malloc. */
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#define xmalloc(S) malloc (S)
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#define xrealloc(V,S) realloc (V,S)
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#else
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#include "config.h"
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#include "system.h"
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#endif
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#include "raise.h"
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/******************************************/
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/* __gnat_initialize (NT-mingw32 Version) */
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/******************************************/
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#if defined (__MINGW32__)
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#include "mingw32.h"
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#include <windows.h>
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extern void __gnat_init_float (void);
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extern void __gnat_install_SEH_handler (void *);
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extern int gnat_argc;
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extern char **gnat_argv;
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#ifdef GNAT_UNICODE_SUPPORT
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#define EXPAND_ARGV_RATE 128
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static void
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append_arg (int *index, LPWSTR dir, LPWSTR value,
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char ***argv, int *last, int quoted)
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{
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int size;
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LPWSTR fullvalue;
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int vallen = _tcslen (value);
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int dirlen;
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if (dir == NULL)
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{
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/* no dir prefix */
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dirlen = 0;
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fullvalue = xmalloc ((vallen + 1) * sizeof(TCHAR));
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}
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else
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{
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/* Add dir first */
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dirlen = _tcslen (dir);
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fullvalue = xmalloc ((dirlen + vallen + 1) * sizeof(TCHAR));
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_tcscpy (fullvalue, dir);
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}
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/* Append value */
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if (quoted)
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{
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_tcsncpy (fullvalue + dirlen, value + 1, vallen - 1);
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fullvalue [dirlen + vallen - sizeof(TCHAR)] = _T('\0');
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}
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else
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_tcscpy (fullvalue + dirlen, value);
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if (*last <= *index)
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{
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*last += EXPAND_ARGV_RATE;
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*argv = (char **) xrealloc (*argv, (*last) * sizeof (char *));
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}
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size = WS2SC (NULL, fullvalue, 0);
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(*argv)[*index] = (char *) xmalloc (size + sizeof(TCHAR));
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WS2SC ((*argv)[*index], fullvalue, size);
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free (fullvalue);
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(*index)++;
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}
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#endif
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void
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__gnat_initialize (void *eh ATTRIBUTE_UNUSED)
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{
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/* Initialize floating-point coprocessor. This call is needed because
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the MS libraries default to 64-bit precision instead of 80-bit
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precision, and we require the full precision for proper operation,
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given that we have set Max_Digits etc with this in mind */
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__gnat_init_float ();
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#ifdef GNAT_UNICODE_SUPPORT
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/* Set current code page for filenames handling. */
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{
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char *codepage = getenv ("GNAT_CODE_PAGE");
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/* Default code page is UTF-8. */
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CurrentCodePage = CP_UTF8;
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if (codepage != NULL)
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{
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if (strcmp (codepage, "CP_ACP") == 0)
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CurrentCodePage = CP_ACP;
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else if (strcmp (codepage, "CP_UTF8") == 0)
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CurrentCodePage = CP_UTF8;
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}
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}
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/* Adjust gnat_argv to support Unicode characters. */
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{
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LPWSTR *wargv;
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int wargc;
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int k;
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int last;
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int argc_expanded = 0;
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TCHAR result [MAX_PATH];
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int quoted;
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wargv = CommandLineToArgvW (GetCommandLineW(), &wargc);
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if (wargv != NULL)
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{
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/* Set gnat_argv with arguments encoded in UTF-8. */
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last = wargc + 1;
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gnat_argv = (char **) xmalloc ((last) * sizeof (char *));
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/* argv[0] is the executable full path-name. */
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SearchPath (NULL, wargv[0], _T(".exe"), MAX_PATH, result, NULL);
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append_arg (&argc_expanded, NULL, result, &gnat_argv, &last, 0);
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for (k=1; k<wargc; k++)
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{
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quoted = (wargv[k][0] == _T('\''));
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/* Check for wildcard expansion if the argument is not quoted. */
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if (!quoted
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&& (_tcsstr (wargv[k], _T("?")) != 0 ||
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_tcsstr (wargv[k], _T("*")) != 0))
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{
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/* Wilcards are present, append all corresponding matches. */
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WIN32_FIND_DATA FileData;
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HANDLE hDir = FindFirstFile (wargv[k], &FileData);
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LPWSTR dir = NULL;
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LPWSTR ldir = _tcsrchr (wargv[k], _T('\\'));
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if (ldir == NULL)
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ldir = _tcsrchr (wargv[k], _T('/'));
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if (hDir == INVALID_HANDLE_VALUE)
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{
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/* No match, append arg as-is. */
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append_arg (&argc_expanded, NULL, wargv[k],
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&gnat_argv, &last, quoted);
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}
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else
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{
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if (ldir != NULL)
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{
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int n = ldir - wargv[k] + 1;
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dir = xmalloc ((n + 1) * sizeof (TCHAR));
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_tcsncpy (dir, wargv[k], n);
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dir[n] = _T('\0');
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}
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/* Append first match and all remaining ones. */
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do {
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/* Do not add . and .. special entries */
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if (_tcscmp (FileData.cFileName, _T(".")) != 0
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&& _tcscmp (FileData.cFileName, _T("..")) != 0)
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append_arg (&argc_expanded, dir, FileData.cFileName,
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&gnat_argv, &last, 0);
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} while (FindNextFile (hDir, &FileData));
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FindClose (hDir);
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if (dir != NULL)
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free (dir);
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}
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}
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else
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{
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/* No wildcard. Store parameter as-is. Remove quote if
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needed. */
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append_arg (&argc_expanded, NULL, wargv[k],
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&gnat_argv, &last, quoted);
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}
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}
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LocalFree (wargv);
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gnat_argc = argc_expanded;
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gnat_argv = (char **) xrealloc
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(gnat_argv, argc_expanded * sizeof (char *));
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}
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}
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#endif
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/* Note that we do not activate this for the compiler itself to avoid a
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bootstrap path problem. Older version of gnatbind will generate a call
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to __gnat_initialize() without argument. Therefore we cannot use eh in
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this case. It will be possible to remove the following #ifdef at some
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point. */
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#ifdef IN_RTS
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/* Install the Structured Exception handler. */
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if (eh)
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__gnat_install_SEH_handler (eh);
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#endif
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}
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/******************************************/
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/* __gnat_initialize (init_float version) */
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/******************************************/
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#elif defined (__Lynx__) || defined (__FreeBSD__) || defined(__NetBSD__) \
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|| defined (__OpenBSD__)
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extern void __gnat_init_float (void);
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void
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__gnat_initialize (void *eh ATTRIBUTE_UNUSED)
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{
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__gnat_init_float ();
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}
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/***************************************/
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/* __gnat_initialize (VxWorks Version) */
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/***************************************/
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#elif defined(__vxworks)
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extern void __gnat_init_float (void);
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void
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__gnat_initialize (void *eh)
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{
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__gnat_init_float ();
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/* On targets where we use the ZCX scheme, we need to register the frame
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tables at load/startup time.
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For applications loaded as a set of "modules", the crtstuff objects
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linked in (crtbegin.o/end.o) are tailored to provide this service
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automatically, a-la C++ constructor fashion, triggered by the VxWorks
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loader thanks to a special variable declaration in crtbegin.o (_ctors).
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Automatic de-registration is handled symmetrically, a-la C++ destructor
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fashion (with a _dtors variable also in crtbegin.o) triggered by the
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dynamic unloader.
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Note that since the tables shall be registered against a common
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data structure, libgcc should be one of the modules (vs being partially
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linked against all the others at build time) and shall be loaded first.
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For applications linked with the kernel, the scheme above would lead to
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duplicated symbols because the VxWorks kernel build "munches" by default,
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so we link against crtbeginT.o instead of crtbegin.o, which doesn't
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include the special variables. We know which set of crt objects is used
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thanks to a boolean indicator present in both sets (__module_has_ctors),
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and directly call the appropriate function here in the not-automatic
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case. We'll never unload that, so there is no de-registration to worry
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about.
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For whole applications loaded as a single module, we may use one scheme
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or the other, except for the mixed Ada/C++ case in which the first scheme
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would fail for the same reason as in the linked-with-kernel situation.
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Selecting the crt set with the ctors/dtors capabilities (first scheme
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above) is triggered by adding "-dynamic" to the gcc *link* command line
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options. Selecting the other set is achieved by using "-static" instead.
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This is a first approach, tightly synchronized with a number of GCC
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configuration and crtstuff changes. We need to ensure that those changes
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are there to activate this circuitry. */
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#if (__GNUC__ >= 3) && (defined (_ARCH_PPC) || defined (__ppc))
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{
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/* The scheme described above is only useful for the actual ZCX case, and
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we don't want any reference to the crt provided symbols otherwise. We
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may not link with any of the crt objects in the non-ZCX case, e.g. from
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documented procedures instructing the use of -nostdlib, and references
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to the ctors symbols here would just remain unsatisfied.
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We have no way to avoid those references in the right conditions in this
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C module, because we have nothing like a IN_ZCX_RTS macro. This aspect
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is then deferred to an Ada routine, which can do that based on a test
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against a constant System flag value. */
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extern void __gnat_vxw_setup_for_eh (void);
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__gnat_vxw_setup_for_eh ();
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}
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#endif
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}
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#elif defined(_T_HPUX10) || (!defined(IN_RTS) && defined(_X_HPUX10))
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/************************************************/
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/* __gnat_initialize (PA-RISC HP-UX 10 Version) */
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/************************************************/
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extern void __main (void);
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void
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__gnat_initialize (void *eh ATTRIBUTE_UNUSED)
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{
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__main ();
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}
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#else
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/* For all other versions of GNAT, the initialize routine and handler
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installation do nothing */
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/***************************************/
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/* __gnat_initialize (Default Version) */
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/***************************************/
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void
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__gnat_initialize (void *eh ATTRIBUTE_UNUSED)
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{
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}
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#endif
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