mirror of
git://source.winehq.org/git/wine.git
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315 lines
7.8 KiB
C
315 lines
7.8 KiB
C
/*
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* Emulator initialisation code
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*
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* Copyright 2000 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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# include <sys/resource.h>
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#endif
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#ifdef HAVE_SYS_SYSCALL_H
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# include <sys/syscall.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include "wine/library.h"
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#include "main.h"
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extern char **environ;
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/* the preloader will set this variable */
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const struct wine_preload_info *wine_main_preload_info = NULL;
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/***********************************************************************
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* check_command_line
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*
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* Check if command line is one that needs to be handled specially.
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*/
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static void check_command_line( int argc, char *argv[] )
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{
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static const char usage[] =
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"Usage: wine PROGRAM [ARGUMENTS...] Run the specified program\n"
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" wine --help Display this help and exit\n"
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" wine --version Output version information and exit";
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if (argc <= 1)
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{
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fprintf( stderr, "%s\n", usage );
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exit(1);
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}
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if (!strcmp( argv[1], "--help" ))
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{
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printf( "%s\n", usage );
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exit(0);
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}
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if (!strcmp( argv[1], "--version" ))
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{
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printf( "%s\n", wine_get_build_id() );
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exit(0);
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}
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}
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#ifdef __ANDROID__
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static int pre_exec(void)
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{
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#if defined(__i386__) || defined(__x86_64__)
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return 1; /* we have a preloader */
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#else
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return 0; /* no exec needed */
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#endif
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}
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#elif defined(__linux__) && (defined(__i386__) || defined(__arm__))
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static void check_vmsplit( void *stack )
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{
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if (stack < (void *)0x80000000)
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{
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/* if the stack is below 0x80000000, assume we can safely try a munmap there */
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if (munmap( (void *)0x80000000, 1 ) == -1 && errno == EINVAL)
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fprintf( stderr,
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"Warning: memory above 0x80000000 doesn't seem to be accessible.\n"
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"Wine requires a 3G/1G user/kernel memory split to work properly.\n" );
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}
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}
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static void set_max_limit( int limit )
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{
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struct rlimit rlimit;
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if (!getrlimit( limit, &rlimit ))
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{
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rlimit.rlim_cur = rlimit.rlim_max;
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setrlimit( limit, &rlimit );
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}
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}
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static int pre_exec(void)
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{
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int temp;
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check_vmsplit( &temp );
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set_max_limit( RLIMIT_AS );
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#ifdef __i386__
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return 1; /* we have a preloader on x86 */
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#else
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return 0;
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#endif
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}
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#elif defined(__linux__) && (defined(__x86_64__) || defined(__aarch64__))
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static int pre_exec(void)
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{
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return 1; /* we have a preloader on x86-64/arm64 */
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}
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#elif defined(__APPLE__) && (defined(__i386__) || defined(__x86_64__))
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static int pre_exec(void)
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{
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return 1; /* we have a preloader */
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}
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#elif (defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__DragonFly__))
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static int pre_exec(void)
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{
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struct rlimit rl;
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rl.rlim_cur = 0x02000000;
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rl.rlim_max = 0x02000000;
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setrlimit( RLIMIT_DATA, &rl );
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return 1;
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}
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#else
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static int pre_exec(void)
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{
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return 0; /* no exec needed */
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}
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#endif
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/* canonicalize path and return its directory name */
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static char *realpath_dirname( const char *name )
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{
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char *p, *fullpath = realpath( name, NULL );
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if (fullpath)
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{
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p = strrchr( fullpath, '/' );
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if (p == fullpath) p++;
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if (p) *p = 0;
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}
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return fullpath;
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}
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/* if string ends with tail, remove it */
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static char *remove_tail( const char *str, const char *tail )
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{
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size_t len = strlen( str );
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size_t tail_len = strlen( tail );
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char *ret;
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if (len < tail_len) return NULL;
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if (strcmp( str + len - tail_len, tail )) return NULL;
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ret = malloc( len - tail_len + 1 );
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memcpy( ret, str, len - tail_len );
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ret[len - tail_len] = 0;
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return ret;
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}
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/* build a path from the specified dir and name */
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static char *build_path( const char *dir, const char *name )
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{
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size_t len = strlen( dir );
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char *ret = malloc( len + strlen( name ) + 2 );
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memcpy( ret, dir, len );
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if (len && ret[len - 1] != '/') ret[len++] = '/';
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strcpy( ret + len, name );
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return ret;
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}
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static const char *get_self_exe( char *argv0 )
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{
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#if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
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return "/proc/self/exe";
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#elif defined (__FreeBSD__) || defined(__DragonFly__)
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return "/proc/curproc/file";
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#else
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if (!strchr( argv0, '/' )) /* search in PATH */
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{
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char *p, *path = getenv( "PATH" );
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if (!path || !(path = strdup(path))) return NULL;
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for (p = strtok( path, ":" ); p; p = strtok( NULL, ":" ))
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{
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char *name = build_path( p, argv0 );
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int found = !access( name, X_OK );
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free( name );
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if (found) break;
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}
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if (p) p = strdup( p );
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free( path );
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return p;
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}
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return argv0;
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#endif
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}
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static void *try_dlopen( const char *dir, const char *name )
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{
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char *path = build_path( dir, name );
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void *handle = dlopen( path, RTLD_NOW );
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free( path );
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return handle;
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}
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static void *load_ntdll( char *argv0 )
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{
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const char *self = get_self_exe( argv0 );
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char *path, *p;
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void *handle = NULL;
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if (self && ((path = realpath_dirname( self ))))
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{
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if ((p = remove_tail( path, "/loader" )))
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{
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handle = try_dlopen( p, "dlls/ntdll/ntdll.so" );
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free( p );
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}
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else handle = try_dlopen( path, BIN_TO_DLLDIR "/ntdll.so" );
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free( path );
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}
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if (!handle && (path = getenv( "WINEDLLPATH" )))
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{
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path = strdup( path );
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for (p = strtok( path, ":" ); p; p = strtok( NULL, ":" ))
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{
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handle = try_dlopen( p, "ntdll.so" );
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if (handle) break;
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}
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free( path );
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}
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if (!handle && !self) handle = try_dlopen( DLLDIR, "ntdll.so" );
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return handle;
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}
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/**********************************************************************
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* main
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*/
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int main( int argc, char *argv[] )
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{
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char error[1024];
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int i;
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void *handle;
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if ((handle = load_ntdll( argv[0] )))
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{
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void (*init_func)(int, char **, char **) = dlsym( handle, "__wine_main" );
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if (init_func) init_func( argc, argv, environ );
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fprintf( stderr, "wine: __wine_main function not found in ntdll.so\n" );
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exit(1);
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}
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if (!getenv( "WINELOADERNOEXEC" )) /* first time around */
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{
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static char noexec[] = "WINELOADERNOEXEC=1";
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putenv( noexec );
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check_command_line( argc, argv );
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if (pre_exec())
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{
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wine_init_argv0_path( argv[0] );
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wine_exec_wine_binary( NULL, argv, getenv( "WINELOADER" ));
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fprintf( stderr, "wine: could not exec the wine loader\n" );
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exit(1);
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}
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}
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if (wine_main_preload_info)
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{
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for (i = 0; wine_main_preload_info[i].size; i++)
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wine_mmap_add_reserved_area( wine_main_preload_info[i].addr, wine_main_preload_info[i].size );
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}
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wine_init( argc, argv, error, sizeof(error) );
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fprintf( stderr, "wine: failed to initialize: %s\n", error );
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exit(1);
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}
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