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libwine: Make the dlopen() wrapper functions obsolete. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2020-04-06 22:44:00 +02:00
parent 0f53fca321
commit b87256cd1d
4 changed files with 145 additions and 155 deletions
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3
include/wine/library.h
View File

@ -55,9 +55,6 @@ extern void wine_exec_wine_binary( const char *name, char **argv, const char *en
typedef void (*load_dll_callback_t)( void *, const char * );
extern void *wine_dlopen( const char *filename, int flag, char *error, size_t errorsize );
extern void *wine_dlsym( void *handle, const char *symbol, char *error, size_t errorsize );
extern int wine_dlclose( void *handle, char *error, size_t errorsize );
extern void wine_dll_set_callback( load_dll_callback_t load );
extern const char *wine_dll_enum_load_path( unsigned int index );

22
libs/port/stubs.c
View File

@ -56,26 +56,4 @@ const char *wine_dll_enum_load_path( unsigned int index )
return NULL;
}
void *wine_dlopen( const char *filename, int flag, char *error, size_t errorsize )
{
if (error)
{
static const char msg[] = "no dlopen support on Windows";
size_t len = min( errorsize, sizeof(msg) );
memcpy( error, msg, len );
error[len - 1] = 0;
}
return NULL;
}
void *wine_dlsym( void *handle, const char *symbol, char *error, size_t errorsize )
{
return NULL;
}
int wine_dlclose( void *handle, char *error, size_t errorsize )
{
return 0;
}
#endif /* _WIN32 */

269
libs/wine/loader.c
View File

@ -508,6 +508,128 @@ const char *wine_dll_enum_load_path( unsigned int index )
#ifdef __ASM_OBSOLETE
/*
* These functions provide wrappers around dlopen() and associated
* functions. They work around a bug in glibc 2.1.x where calling
* a dl*() function after a previous dl*() function has failed
* without a dlerror() call between the two will cause a crash.
* They all take a pointer to a buffer that
* will receive the error description (from dlerror()). This
* parameter may be NULL if the error description is not required.
*/
#ifndef RTLD_FIRST
#define RTLD_FIRST 0
#endif
/***********************************************************************
* wine_dlopen
*/
void *wine_dlopen_obsolete( const char *filename, int flag, char *error, size_t errorsize )
{
void *ret;
const char *s;
#ifdef __APPLE__
/* the Mac OS loader pretends to be able to load PE files, so avoid them here */
unsigned char magic[2];
int fd = open( filename, O_RDONLY );
if (fd != -1)
{
if (pread( fd, magic, 2, 0 ) == 2 && magic[0] == 'M' && magic[1] == 'Z')
{
if (error && errorsize)
{
static const char msg[] = "MZ format";
size_t len = min( errorsize, sizeof(msg) );
memcpy( error, msg, len );
error[len - 1] = 0;
}
close( fd );
return NULL;
}
close( fd );
}
#endif
dlerror(); dlerror();
#ifdef __sun
if (strchr( filename, ':' ))
{
char path[PATH_MAX];
/* Solaris' brain damaged dlopen() treats ':' as a path separator */
realpath( filename, path );
ret = dlopen( path, flag | RTLD_FIRST );
}
else
#endif
ret = dlopen( filename, flag | RTLD_FIRST );
s = dlerror();
if (error && errorsize)
{
if (s)
{
size_t len = strlen(s);
if (len >= errorsize) len = errorsize - 1;
memcpy( error, s, len );
error[len] = 0;
}
else error[0] = 0;
}
dlerror();
return ret;
}
/***********************************************************************
* wine_dlsym
*/
void *wine_dlsym_obsolete( void *handle, const char *symbol, char *error, size_t errorsize )
{
void *ret;
const char *s;
dlerror(); dlerror();
ret = dlsym( handle, symbol );
s = dlerror();
if (error && errorsize)
{
if (s)
{
size_t len = strlen(s);
if (len >= errorsize) len = errorsize - 1;
memcpy( error, s, len );
error[len] = 0;
}
else error[0] = 0;
}
dlerror();
return ret;
}
/***********************************************************************
* wine_dlclose
*/
int wine_dlclose_obsolete( void *handle, char *error, size_t errorsize )
{
int ret;
const char *s;
dlerror(); dlerror();
ret = dlclose( handle );
s = dlerror();
if (error && errorsize)
{
if (s)
{
size_t len = strlen(s);
if (len >= errorsize) len = errorsize - 1;
memcpy( error, s, len );
error[len] = 0;
}
else error[0] = 0;
}
dlerror();
return ret;
}
/* check if the library is the correct architecture */
/* only returns false for a valid library of the wrong arch */
static int check_library_arch( int fd )
@ -570,7 +692,7 @@ static void *dlopen_dll( const char *name, char *error, int errorsize,
*exists = 0;
for (path = first_dll_path( name, 0, &context ); path; path = next_dll_path( &context ))
{
if (!test_only && (ret = wine_dlopen( path, RTLD_NOW, error, errorsize ))) break;
if (!test_only && (ret = wine_dlopen_obsolete( path, RTLD_NOW, error, errorsize ))) break;
if ((*exists = file_exists( path ))) break; /* exists but cannot be loaded, return the error */
}
free_dll_path( &context );
@ -616,7 +738,7 @@ void *wine_dll_load_obsolete( const char *filename, char *error, int errorsize,
void wine_dll_unload_obsolete( void *handle )
{
if (handle != (void *)1)
wine_dlclose( handle, NULL, 0 );
wine_dlclose_obsolete( handle, NULL, 0 );
}
@ -664,6 +786,9 @@ int wine_dll_get_owner_obsolete( const char *name, char *buffer, int size, int *
return ret;
}
__ASM_OBSOLETE(wine_dlopen);
__ASM_OBSOLETE(wine_dlsym);
__ASM_OBSOLETE(wine_dlclose);
__ASM_OBSOLETE(wine_dll_get_owner);
__ASM_OBSOLETE(wine_dll_load);
__ASM_OBSOLETE(wine_dll_load_main_exe);
@ -983,7 +1108,7 @@ void wine_init( int argc, char *argv[], char *error, int error_size )
for (path = first_dll_path( "ntdll.dll", 0, &context ); path; path = next_dll_path( &context ))
{
if ((ntdll = wine_dlopen( path, RTLD_NOW, error, error_size )))
if ((ntdll = dlopen( path, RTLD_NOW )))
{
/* if we didn't use the default dll dir, remove it from the search path */
if (default_dlldir[0] && context.index < nb_dll_paths + 2) nb_dll_paths--;
@ -992,133 +1117,23 @@ void wine_init( int argc, char *argv[], char *error, int error_size )
}
free_dll_path( &context );
if (!ntdll) return;
if (!(init_func = wine_dlsym( ntdll, "__wine_process_init", error, error_size ))) return;
if (!ntdll || !(init_func = dlsym( ntdll, "__wine_process_init" )))
{
if (error && error_size)
{
const char *s = dlerror();
if (s)
{
size_t len = min( strlen(s), error_size - 1 );
memcpy( error, s, len );
error[len] = 0;
}
else error[0] = 0;
}
}
#ifdef __APPLE__
apple_main_thread( init_func );
#else
init_func();
#endif
}
/*
* These functions provide wrappers around dlopen() and associated
* functions. They work around a bug in glibc 2.1.x where calling
* a dl*() function after a previous dl*() function has failed
* without a dlerror() call between the two will cause a crash.
* They all take a pointer to a buffer that
* will receive the error description (from dlerror()). This
* parameter may be NULL if the error description is not required.
*/
#ifndef RTLD_FIRST
#define RTLD_FIRST 0
#endif
/***********************************************************************
* wine_dlopen
*/
void *wine_dlopen( const char *filename, int flag, char *error, size_t errorsize )
{
void *ret;
const char *s;
#ifdef __APPLE__
/* the Mac OS loader pretends to be able to load PE files, so avoid them here */
unsigned char magic[2];
int fd = open( filename, O_RDONLY );
if (fd != -1)
{
if (pread( fd, magic, 2, 0 ) == 2 && magic[0] == 'M' && magic[1] == 'Z')
{
if (error && errorsize)
{
static const char msg[] = "MZ format";
size_t len = min( errorsize, sizeof(msg) );
memcpy( error, msg, len );
error[len - 1] = 0;
}
close( fd );
return NULL;
}
close( fd );
}
#endif
dlerror(); dlerror();
#ifdef __sun
if (strchr( filename, ':' ))
{
char path[PATH_MAX];
/* Solaris' brain damaged dlopen() treats ':' as a path separator */
realpath( filename, path );
ret = dlopen( path, flag | RTLD_FIRST );
}
else
#endif
ret = dlopen( filename, flag | RTLD_FIRST );
s = dlerror();
if (error && errorsize)
{
if (s)
{
size_t len = strlen(s);
if (len >= errorsize) len = errorsize - 1;
memcpy( error, s, len );
error[len] = 0;
}
else error[0] = 0;
}
dlerror();
return ret;
}
/***********************************************************************
* wine_dlsym
*/
void *wine_dlsym( void *handle, const char *symbol, char *error, size_t errorsize )
{
void *ret;
const char *s;
dlerror(); dlerror();
ret = dlsym( handle, symbol );
s = dlerror();
if (error && errorsize)
{
if (s)
{
size_t len = strlen(s);
if (len >= errorsize) len = errorsize - 1;
memcpy( error, s, len );
error[len] = 0;
}
else error[0] = 0;
}
dlerror();
return ret;
}
/***********************************************************************
* wine_dlclose
*/
int wine_dlclose( void *handle, char *error, size_t errorsize )
{
int ret;
const char *s;
dlerror(); dlerror();
ret = dlclose( handle );
s = dlerror();
if (error && errorsize)
{
if (s)
{
size_t len = strlen(s);
if (len >= errorsize) len = errorsize - 1;
memcpy( error, s, len );
error[len] = 0;
}
else error[0] = 0;
}
dlerror();
return ret;
}

6
libs/wine/wine.map
View File

@ -9,11 +9,8 @@ WINE_1.0
wine_anon_mmap;
wine_casemap_lower;
wine_casemap_upper;
wine_dlclose;
wine_dll_enum_load_path;
wine_dll_set_callback;
wine_dlopen;
wine_dlsym;
wine_exec_wine_binary;
wine_get_build_dir;
wine_get_build_id;
@ -88,10 +85,13 @@ WINE_1.0
wine_dbg_sprintf;
wine_dbgstr_an;
wine_dbgstr_wn;
wine_dlclose;
wine_dll_get_owner;
wine_dll_load;
wine_dll_load_main_exe;
wine_dll_unload;
wine_dlopen;
wine_dlsym;
wine_fold_string;
wine_get_cs;
wine_get_ds;