ntoskrnl.exe: Implement NtBuildNumber.
[wine.git] / loader / main.c
blobf197cf802e5f43fa87024f8087a900cf9057b762
1 /*
2 * Emulator initialisation code
4 * Copyright 2000 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 #include "config.h"
22 #include "wine/port.h"
24 #include <errno.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #ifdef HAVE_SYS_MMAN_H
28 # include <sys/mman.h>
29 #endif
30 #ifdef HAVE_SYS_RESOURCE_H
31 # include <sys/resource.h>
32 #endif
33 #ifdef HAVE_SYS_SYSCALL_H
34 # include <sys/syscall.h>
35 #endif
36 #ifdef HAVE_UNISTD_H
37 # include <unistd.h>
38 #endif
39 #include <pthread.h>
41 #include "wine/library.h"
42 #include "main.h"
44 /* the preloader will set this variable */
45 const struct wine_preload_info *wine_main_preload_info = NULL;
47 /***********************************************************************
48 * check_command_line
50 * Check if command line is one that needs to be handled specially.
52 static void check_command_line( int argc, char *argv[] )
54 static const char usage[] =
55 "Usage: wine PROGRAM [ARGUMENTS...] Run the specified program\n"
56 " wine --help Display this help and exit\n"
57 " wine --version Output version information and exit";
59 if (argc <= 1)
61 fprintf( stderr, "%s\n", usage );
62 exit(1);
64 if (!strcmp( argv[1], "--help" ))
66 printf( "%s\n", usage );
67 exit(0);
69 if (!strcmp( argv[1], "--version" ))
71 printf( "%s\n", wine_get_build_id() );
72 exit(0);
77 #ifdef __ANDROID__
79 static int pre_exec(void)
81 #if defined(__i386__) || defined(__x86_64__)
82 return 1; /* we have a preloader */
83 #else
84 return 0; /* no exec needed */
85 #endif
88 #elif defined(__linux__) && (defined(__i386__) || defined(__arm__))
90 #ifdef __i386__
91 /* separate thread to check for NPTL and TLS features */
92 static void *needs_pthread( void *arg )
94 pid_t tid = syscall( 224 /* SYS_gettid */ );
95 /* check for NPTL */
96 if (tid != -1 && tid != getpid()) return (void *)1;
97 /* check for TLS glibc */
98 if (wine_get_gs() != 0) return (void *)1;
99 /* check for exported epoll_create to detect new glibc versions without TLS */
100 if (wine_dlsym( RTLD_DEFAULT, "epoll_create", NULL, 0 ))
101 fprintf( stderr,
102 "wine: glibc >= 2.3 without NPTL or TLS is not a supported combination.\n"
103 " Please upgrade to a glibc with NPTL support.\n" );
104 else
105 fprintf( stderr,
106 "wine: Your C library is too old. You need at least glibc 2.3 with NPTL support.\n" );
107 return 0;
110 /* check if we support the glibc threading model */
111 static void check_threading(void)
113 pthread_t id;
114 void *ret;
116 pthread_create( &id, NULL, needs_pthread, NULL );
117 pthread_join( id, &ret );
118 if (!ret) exit(1);
120 #else
121 static void check_threading(void)
124 #endif
126 static void check_vmsplit( void *stack )
128 if (stack < (void *)0x80000000)
130 /* if the stack is below 0x80000000, assume we can safely try a munmap there */
131 if (munmap( (void *)0x80000000, 1 ) == -1 && errno == EINVAL)
132 fprintf( stderr,
133 "Warning: memory above 0x80000000 doesn't seem to be accessible.\n"
134 "Wine requires a 3G/1G user/kernel memory split to work properly.\n" );
138 static void set_max_limit( int limit )
140 struct rlimit rlimit;
142 if (!getrlimit( limit, &rlimit ))
144 rlimit.rlim_cur = rlimit.rlim_max;
145 setrlimit( limit, &rlimit );
149 static int pre_exec(void)
151 int temp;
153 check_threading();
154 check_vmsplit( &temp );
155 set_max_limit( RLIMIT_AS );
156 #ifdef __i386__
157 return 1; /* we have a preloader on x86 */
158 #else
159 return 0;
160 #endif
163 #elif defined(__linux__) && (defined(__x86_64__) || defined(__aarch64__))
165 static int pre_exec(void)
167 return 1; /* we have a preloader on x86-64/arm64 */
170 #elif defined(__APPLE__) && (defined(__i386__) || defined(__x86_64__))
172 static int pre_exec(void)
174 return 1; /* we have a preloader */
177 #elif (defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__DragonFly__))
179 static int pre_exec(void)
181 struct rlimit rl;
183 rl.rlim_cur = 0x02000000;
184 rl.rlim_max = 0x02000000;
185 setrlimit( RLIMIT_DATA, &rl );
186 return 1;
189 #else
191 static int pre_exec(void)
193 return 0; /* no exec needed */
196 #endif
199 /**********************************************************************
200 * main
202 int main( int argc, char *argv[] )
204 char error[1024];
205 int i;
207 if (!getenv( "WINELOADERNOEXEC" )) /* first time around */
209 static char noexec[] = "WINELOADERNOEXEC=1";
211 putenv( noexec );
212 check_command_line( argc, argv );
213 if (pre_exec())
215 wine_init_argv0_path( argv[0] );
216 wine_exec_wine_binary( NULL, argv, getenv( "WINELOADER" ));
217 fprintf( stderr, "wine: could not exec the wine loader\n" );
218 exit(1);
222 if (wine_main_preload_info)
224 for (i = 0; wine_main_preload_info[i].size; i++)
225 wine_mmap_add_reserved_area( wine_main_preload_info[i].addr, wine_main_preload_info[i].size );
228 wine_init( argc, argv, error, sizeof(error) );
229 fprintf( stderr, "wine: failed to initialize: %s\n", error );
230 exit(1);