Subversion Repositories openrisc_2011-10-31

/****************************************************************************

 *                                                                          *

 *                         GNAT COMPILER COMPONENTS                         *

 *                                                                          *

 *                           I N I T I A L I Z E                            *

 *                                                                          *

 *                          C Implementation File                           *

 *                                                                          *

 *          Copyright (C) 1992-2009, Free Software Foundation, Inc.         *

 *                                                                          *

 * GNAT is free software;  you can  redistribute it  and/or modify it under *

 * terms of the  GNU General Public License as published  by the Free Soft- *

 * ware  Foundation;  either version 3,  or (at your option) any later ver- *

 * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *

 * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *

 * or FITNESS FOR A PARTICULAR PURPOSE.                                     *

 *                                                                          *

 * As a special exception under Section 7 of GPL version 3, you are granted *

 * additional permissions described in the GCC Runtime Library Exception,   *

 * version 3.1, as published by the Free Software Foundation.               *

 *                                                                          *

 * You should have received a copy of the GNU General Public License and    *

 * a copy of the GCC Runtime Library Exception along with this program;     *

 * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    *

 * <http://www.gnu.org/licenses/>.                                          *

 *                                                                          *

 * GNAT was originally developed  by the GNAT team at  New York University. *

 * Extensive contributions were provided by Ada Core Technologies Inc.      *

 *                                                                          *

 ****************************************************************************/

/*  This unit provides default implementation for __gnat_initialize ()

    which is called before the elaboration of the partition. It is provided

    in a separate file/object so that users can replace it easily.

    The default implementation should be null on most targets. */

/* The following include is here to meet the published VxWorks requirement

   that the __vxworks header appear before any other include. */

#ifdef __vxworks

#include "vxWorks.h"

#endif

#ifdef IN_RTS

#include "tconfig.h"

#include "tsystem.h"

/* We don't have libiberty, so use malloc.  */

#define xmalloc(S) malloc (S)

#define xrealloc(V,S) realloc (V,S)

#else

#include "config.h"

#include "system.h"

#endif

#include "raise.h"

/******************************************/

/* __gnat_initialize (NT-mingw32 Version) */

/******************************************/

#if defined (__MINGW32__)

#include "mingw32.h"

#include <windows.h>

extern void __gnat_init_float (void);

extern void __gnat_install_SEH_handler (void *);

extern int gnat_argc;

extern char **gnat_argv;

#ifdef GNAT_UNICODE_SUPPORT

#define EXPAND_ARGV_RATE 128

static void

append_arg (int *index, LPWSTR dir, LPWSTR value,

            char ***argv, int *last, int quoted)

{

  int size;

  LPWSTR fullvalue;

  int vallen = _tcslen (value);

  int dirlen;

  if (dir == NULL)

    {

      /* no dir prefix */

      dirlen = 0;

      fullvalue = xmalloc ((vallen + 1) * sizeof(TCHAR));

    }

  else

    {

      /* Add dir first */

      dirlen = _tcslen (dir);

      fullvalue = xmalloc ((dirlen + vallen + 1) * sizeof(TCHAR));

      _tcscpy (fullvalue, dir);

    }

  /* Append value */

  if (quoted)

    {

      _tcsncpy (fullvalue + dirlen, value + 1, vallen - 1);

      fullvalue [dirlen + vallen - sizeof(TCHAR)] = _T('\0');

    }

  else

    _tcscpy (fullvalue + dirlen, value);

  if (*last <= *index)

    {

      *last += EXPAND_ARGV_RATE;

      *argv = (char **) xrealloc (*argv, (*last) * sizeof (char *));

    }

  size = WS2SC (NULL, fullvalue, 0);

  (*argv)[*index] = (char *) xmalloc (size + sizeof(TCHAR));

  WS2SC ((*argv)[*index], fullvalue, size);

  free (fullvalue);

  (*index)++;

}

#endif

void

__gnat_initialize (void *eh ATTRIBUTE_UNUSED)

{

   /* Initialize floating-point coprocessor. This call is needed because

      the MS libraries default to 64-bit precision instead of 80-bit

      precision, and we require the full precision for proper operation,

      given that we have set Max_Digits etc with this in mind */

   __gnat_init_float ();

#ifdef GNAT_UNICODE_SUPPORT

   /* Set current code page for filenames handling. */

   {

     char *codepage = getenv ("GNAT_CODE_PAGE");

     /* Default code page is UTF-8.  */

     CurrentCodePage = CP_UTF8;

     if (codepage != NULL)

       {

         if (strcmp (codepage, "CP_ACP") == 0)

           CurrentCodePage = CP_ACP;

         else if (strcmp (codepage, "CP_UTF8") == 0)

           CurrentCodePage = CP_UTF8;

       }

   }

   /* Adjust gnat_argv to support Unicode characters. */

   {

     LPWSTR *wargv;

     int wargc;

     int k;

     int last;

     int argc_expanded = 0;

     TCHAR result [MAX_PATH];

     int quoted;

     wargv = CommandLineToArgvW (GetCommandLineW(), &wargc);

     if (wargv != NULL)

       {

         /* Set gnat_argv with arguments encoded in UTF-8. */

         last = wargc + 1;

         gnat_argv = (char **) xmalloc ((last) * sizeof (char *));

         /* argv[0] is the executable full path-name. */

         SearchPath (NULL, wargv[0], _T(".exe"), MAX_PATH, result, NULL);

         append_arg (&argc_expanded, NULL, result, &gnat_argv, &last, 0);

         for (k=1; k<wargc; k++)

           {

             quoted = (wargv[k][0] == _T('\''));

             /* Check for wildcard expansion if the argument is not quoted. */

             if (!quoted

                 && (_tcsstr (wargv[k], _T("?")) != 0 ||

                     _tcsstr (wargv[k], _T("*")) != 0))

               {

                 /* Wilcards are present, append all corresponding matches. */

                 WIN32_FIND_DATA FileData;

                 HANDLE hDir = FindFirstFile (wargv[k], &FileData);

                 LPWSTR dir = NULL;

                 LPWSTR ldir = _tcsrchr (wargv[k], _T('\\'));

                 if (ldir == NULL)

                   ldir = _tcsrchr (wargv[k], _T('/'));

                 if (hDir == INVALID_HANDLE_VALUE)

                   {

                     /* No match, append arg as-is. */

                     append_arg (&argc_expanded, NULL, wargv[k],

                                 &gnat_argv, &last, quoted);

                   }

                 else

                   {

                     if (ldir != NULL)

                       {

                         int n = ldir - wargv[k] + 1;

                         dir = xmalloc ((n + 1) * sizeof (TCHAR));

                         _tcsncpy (dir, wargv[k], n);

                         dir[n] = _T('\0');

                       }

                     /* Append first match and all remaining ones.  */

                     do {

                       /* Do not add . and .. special entries */

                       if (_tcscmp (FileData.cFileName, _T(".")) != 0

                           && _tcscmp (FileData.cFileName, _T("..")) != 0)

                         append_arg (&argc_expanded, dir, FileData.cFileName,

                                     &gnat_argv, &last, 0);

                     } while (FindNextFile (hDir, &FileData));

                     FindClose (hDir);

                     if (dir != NULL)

                       free (dir);

                   }

               }

             else

               {

                 /*  No wildcard. Store parameter as-is. Remove quote if

                     needed. */

                 append_arg (&argc_expanded, NULL, wargv[k],

                             &gnat_argv, &last, quoted);

               }

           }

         LocalFree (wargv);

         gnat_argc = argc_expanded;

         gnat_argv = (char **) xrealloc

           (gnat_argv, argc_expanded * sizeof (char *));

       }

   }

#endif

   /* Note that we do not activate this for the compiler itself to avoid a

      bootstrap path problem.  Older version of gnatbind will generate a call

      to __gnat_initialize() without argument. Therefore we cannot use eh in

      this case.  It will be possible to remove the following #ifdef at some

      point.  */

#ifdef IN_RTS

   /* Install the Structured Exception handler.  */

   if (eh)

     __gnat_install_SEH_handler (eh);

#endif

}

/******************************************/

/* __gnat_initialize (init_float version) */

/******************************************/

#elif defined (__Lynx__) || defined (__FreeBSD__) || defined(__NetBSD__) \

  || defined (__OpenBSD__)

extern void __gnat_init_float (void);

void

__gnat_initialize (void *eh ATTRIBUTE_UNUSED)

{

   __gnat_init_float ();

}

/***************************************/

/* __gnat_initialize (VxWorks Version) */

/***************************************/

#elif defined(__vxworks)

extern void __gnat_init_float (void);

void

__gnat_initialize (void *eh)

{

  __gnat_init_float ();

  /* On targets where we use the ZCX scheme, we need to register the frame

     tables at load/startup time.

     For applications loaded as a set of "modules", the crtstuff objects

     linked in (crtbegin.o/end.o) are tailored to provide this service

     automatically, a-la C++ constructor fashion, triggered by the VxWorks

     loader thanks to a special variable declaration in crtbegin.o (_ctors).

     Automatic de-registration is handled symmetrically, a-la C++ destructor

     fashion (with a _dtors variable also in crtbegin.o) triggered by the

     dynamic unloader.

     Note that since the tables shall be registered against a common

     data structure, libgcc should be one of the modules (vs being partially

     linked against all the others at build time) and shall be loaded first.

     For applications linked with the kernel, the scheme above would lead to

     duplicated symbols because the VxWorks kernel build "munches" by default,

     so we link against crtbeginT.o instead of crtbegin.o, which doesn't

     include the special variables. We know which set of crt objects is used

     thanks to a boolean indicator present in both sets (__module_has_ctors),

     and directly call the appropriate function here in the not-automatic

     case. We'll never unload that, so there is no de-registration to worry

     about.

     For whole applications loaded as a single module, we may use one scheme

     or the other, except for the mixed Ada/C++ case in which the first scheme

     would fail for the same reason as in the linked-with-kernel situation.

     Selecting the crt set with the ctors/dtors capabilities (first scheme

     above) is triggered by adding "-dynamic" to the gcc *link* command line

     options. Selecting the other set is achieved by using "-static" instead.

     This is a first approach, tightly synchronized with a number of GCC

     configuration and crtstuff changes. We need to ensure that those changes

     are there to activate this circuitry.  */

#if (__GNUC__ >= 3) && (defined (_ARCH_PPC) || defined (__ppc))

 {

   /* The scheme described above is only useful for the actual ZCX case, and

      we don't want any reference to the crt provided symbols otherwise.  We

      may not link with any of the crt objects in the non-ZCX case, e.g. from

      documented procedures instructing the use of -nostdlib, and references

      to the ctors symbols here would just remain unsatisfied.

      We have no way to avoid those references in the right conditions in this

      C module, because we have nothing like a IN_ZCX_RTS macro.  This aspect

      is then deferred to an Ada routine, which can do that based on a test

      against a constant System flag value.  */

   extern void __gnat_vxw_setup_for_eh (void);

   __gnat_vxw_setup_for_eh ();

 }

#endif

}

#elif defined(_T_HPUX10) || (!defined(IN_RTS) && defined(_X_HPUX10))

/************************************************/

/* __gnat_initialize (PA-RISC HP-UX 10 Version) */

/************************************************/

extern void __main (void);

void

__gnat_initialize (void *eh ATTRIBUTE_UNUSED)

{

  __main ();

}

#else

/* For all other versions of GNAT, the initialize routine and handler

   installation do nothing */

/***************************************/

/* __gnat_initialize (Default Version) */

/***************************************/

void

__gnat_initialize (void *eh ATTRIBUTE_UNUSED)

{

}

#endif