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wineandroid: Wrap Java calls to preserve %gs on x86_64.

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Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2018-11-26 14:42:18 +01:00
parent 996f7a192d
commit 2b8d787b17
1 changed files with 30 additions and 10 deletions
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40
dlls/wineandroid.drv/device.c
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@ -240,13 +240,39 @@ static inline BOOL is_client_in_process(void)
return current_client_id() == GetCurrentProcessId();
}
#ifdef __i386__ /* the Java VM uses %fs for its own purposes, so we need to wrap the calls */
#ifdef __i386__ /* the Java VM uses %fs/%gs for its own purposes, so we need to wrap the calls */
static WORD orig_fs, java_fs;
static inline void wrap_java_call(void) { wine_set_fs( java_fs ); }
static inline void unwrap_java_call(void) { wine_set_fs( orig_fs ); }
static inline void init_java_thread( JavaVM *java_vm )
{
orig_fs = wine_get_fs();
(*java_vm)->AttachCurrentThread( java_vm, &jni_env, 0 );
java_fs = wine_get_fs();
wine_set_fs( orig_fs );
}
#elif defined(__x86_64__)
#include <asm/prctl.h>
#include <asm/unistd.h>
static void *orig_teb, *java_teb;
static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, ptr ); }
static inline void wrap_java_call(void) { arch_prctl( ARCH_SET_GS, java_teb ); }
static inline void unwrap_java_call(void) { arch_prctl( ARCH_SET_GS, orig_teb ); }
static inline void init_java_thread( JavaVM *java_vm )
{
arch_prctl( ARCH_GET_GS, &orig_teb );
(*java_vm)->AttachCurrentThread( java_vm, &jni_env, 0 );
arch_prctl( ARCH_GET_GS, &java_teb );
arch_prctl( ARCH_SET_GS, orig_teb );
}
#else
static inline void wrap_java_call(void) { }
static inline void unwrap_java_call(void) { }
static inline void init_java_thread( JavaVM *java_vm ) { (*java_vm)->AttachCurrentThread( java_vm, &jni_env, 0 ); }
#endif /* __i386__ */
static struct native_win_data *data_map[65536];
@ -1092,15 +1118,7 @@ static DWORD CALLBACK device_thread( void *arg )
if (!(java_vm = wine_get_java_vm())) return 0; /* not running under Java */
#ifdef __i386__
orig_fs = wine_get_fs();
(*java_vm)->AttachCurrentThread( java_vm, &jni_env, 0 );
java_fs = wine_get_fs();
wine_set_fs( orig_fs );
if (java_fs != orig_fs) TRACE( "%%fs changed from %04x to %04x by Java VM\n", orig_fs, java_fs );
#else
(*java_vm)->AttachCurrentThread( java_vm, &jni_env, 0 );
#endif
init_java_thread( java_vm );
create_desktop_window( GetDesktopWindow() );
@ -1116,7 +1134,9 @@ static DWORD CALLBACK device_thread( void *arg )
ret = wine_ntoskrnl_main_loop( stop_event );
wrap_java_call();
(*java_vm)->DetachCurrentThread( java_vm );
unwrap_java_call();
return ret;
}