Wine Cross Reference
wine/loader/main.c

   /*
    * Emulator initialisation code
    *
    * Copyright 2000 Alexandre Julliard
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  #include "config.h"
  #include "wine/port.h"
  
  #include <errno.h>
  #include <stdio.h>
  #include <stdlib.h>
  #ifdef HAVE_SYS_MMAN_H
  # include <sys/mman.h>
  #endif
  #ifdef HAVE_SYS_RESOURCE_H
  # include <sys/resource.h>
  #endif
  #ifdef HAVE_SYS_SYSCALL_H
  # include <sys/syscall.h>
  #endif
  #ifdef HAVE_UNISTD_H
  # include <unistd.h>
  #endif
  #include <pthread.h>
  
  #include "wine/library.h"
  #include "main.h"
  
  #ifdef __APPLE__
  
  __asm__(".zerofill WINE_DOS, WINE_DOS, ___wine_dos, 0x40000000");
  __asm__(".zerofill WINE_SHAREDHEAP, WINE_SHAREDHEAP, ___wine_shared_heap, 0x03000000");
  extern char __wine_dos[0x40000000], __wine_shared_heap[0x03000000];
  
  static const struct wine_preload_info wine_main_preload_info[] =
  {
      { __wine_dos,         sizeof(__wine_dos) },          /* DOS area + PE exe */
      { __wine_shared_heap, sizeof(__wine_shared_heap) },  /* shared user data + shared heap */
      { 0, 0 }  /* end of list */
  };
  
  static inline void reserve_area( void *addr, size_t size )
  {
      wine_anon_mmap( addr, size, PROT_NONE, MAP_FIXED | MAP_NORESERVE );
      wine_mmap_add_reserved_area( addr, size );
  }
  
  #else  /* __APPLE__ */
  
  /* the preloader will set this variable */
  const struct wine_preload_info *wine_main_preload_info = NULL;
  
  static inline void reserve_area( void *addr, size_t size )
  {
      wine_mmap_add_reserved_area( addr, size );
  }
  
  #endif  /* __APPLE__ */
  
  /***********************************************************************
   *           check_command_line
   *
   * Check if command line is one that needs to be handled specially.
   */
  static void check_command_line( int argc, char *argv[] )
  {
      static const char usage[] =
          "Usage: wine PROGRAM [ARGUMENTS...]   Run the specified program\n"
          "       wine --help                   Display this help and exit\n"
          "       wine --version                Output version information and exit";
  
      if (argc <= 1)
      {
          fprintf( stderr, "%s\n", usage );
          exit(1);
      }
      if (!strcmp( argv[1], "--help" ))
      {
          printf( "%s\n", usage );
          exit(0);
      }
      if (!strcmp( argv[1], "--version" ))
      {
          printf( "%s\n", wine_get_build_id() );
         exit(0);
     }
 }
 
 
 #if defined(__linux__) && defined(__i386__)
 
 /* separate thread to check for NPTL and TLS features */
 static void *needs_pthread( void *arg )
 {
     pid_t tid = syscall( SYS_gettid );
     /* check for NPTL */
     if (tid != -1 && tid != getpid()) return (void *)1;
     /* check for TLS glibc */
     if (wine_get_gs() != 0) return (void *)1;
     /* check for exported epoll_create to detect new glibc versions without TLS */
     if (wine_dlsym( RTLD_DEFAULT, "epoll_create", NULL, 0 ))
         fprintf( stderr,
                  "wine: glibc >= 2.3 without NPTL or TLS is not a supported combination.\n"
                  "      Please upgrade to a glibc with NPTL support.\n" );
     else
         fprintf( stderr,
                  "wine: Your C library is too old. You need at least glibc 2.3 with NPTL support.\n" );
     return 0;
 }
 
 /* check if we support the glibc threading model */
 static void check_threading(void)
 {
     pthread_t id;
     void *ret;
 
     pthread_create( &id, NULL, needs_pthread, NULL );
     pthread_join( id, &ret );
     if (!ret) exit(1);
 }
 
 static void check_vmsplit( void *stack )
 {
     if (stack < (void *)0x80000000)
     {
         /* if the stack is below 0x80000000, assume we can safely try a munmap there */
         if (munmap( (void *)0x80000000, 1 ) == -1 && errno == EINVAL)
             fprintf( stderr,
                      "Warning: memory above 0x80000000 doesn't seem to be accessible.\n"
                      "Wine requires a 3G/1G user/kernel memory split to work properly.\n" );
     }
 }
 
 static void set_max_limit( int limit )
 {
     struct rlimit rlimit;
 
     if (!getrlimit( limit, &rlimit ))
     {
         rlimit.rlim_cur = rlimit.rlim_max;
         setrlimit( limit, &rlimit );
     }
 }
 
 static int pre_exec(void)
 {
     int temp;
 
     check_threading();
     check_vmsplit( &temp );
     set_max_limit( RLIMIT_AS );
     return 1;
 }
 
 #elif defined(__linux__) && defined(__x86_64__)
 
 static int pre_exec(void)
 {
     return 1;  /* we have a preloader on x86-64 */
 }
 
 #elif (defined(__FreeBSD__) || defined (__FreeBSD_kernel__)) && defined(__i386__)
 
 static int pre_exec(void)
 {
     struct rlimit rl;
 
     rl.rlim_cur = 0x02000000;
     rl.rlim_max = 0x02000000;
     setrlimit( RLIMIT_DATA, &rl );
     return 1;
 }
 
 #else
 
 static int pre_exec(void)
 {
     return 0;  /* no exec needed */
 }
 
 #endif
 
 
 /**********************************************************************
  *           main
  */
 int main( int argc, char *argv[] )
 {
     char error[1024];
     int i;
 
     if (!getenv( "WINELOADERNOEXEC" ))  /* first time around */
     {
         static char noexec[] = "WINELOADERNOEXEC=1";
 
         putenv( noexec );
         check_command_line( argc, argv );
         if (pre_exec())
         {
             wine_init_argv0_path( argv[0] );
             wine_exec_wine_binary( NULL, argv, getenv( "WINELOADER" ));
             fprintf( stderr, "wine: could not exec the wine loader\n" );
             exit(1);
         }
     }
 
     if (wine_main_preload_info)
     {
         for (i = 0; wine_main_preload_info[i].size; i++)
             reserve_area( wine_main_preload_info[i].addr, wine_main_preload_info[i].size );
     }
 
     wine_init( argc, argv, error, sizeof(error) );
     fprintf( stderr, "wine: failed to initialize: %s\n", error );
     exit(1);
 }