2 * System-dependent scheduler support
4 * Copyright 1998 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
29 #ifdef HAVE_SYS_TIME_H
30 # include <sys/time.h>
32 #ifdef HAVE_SYS_SYSCALL_H
33 # include <sys/syscall.h>
38 #ifdef HAVE_UCONTEXT_H
39 # include <ucontext.h>
41 #ifdef HAVE_SYS_MMAN_H
49 #include "wine/server.h"
51 #include "wine/winbase16.h"
52 #include "wine/exception.h"
53 #include "wine/library.h"
54 #include "wine/debug.h"
56 WINE_DEFAULT_DEBUG_CHANNEL(thread);
58 struct thread_cleanup_info
65 /* temporary stacks used on thread exit */
66 #define TEMP_STACK_SIZE 1024
67 #define NB_TEMP_STACKS 8
68 static char temp_stacks[NB_TEMP_STACKS][TEMP_STACK_SIZE];
69 static LONG next_temp_stack; /* next temp stack to use */
71 /***********************************************************************
72 * SYSDEPS_SetCurThread
74 * Make 'thread' the current thread.
76 void SYSDEPS_SetCurThread( TEB *teb )
79 /* On the i386, the current thread is in the %fs register */
82 wine_ldt_set_base( &fs_entry, teb );
83 wine_ldt_set_limit( &fs_entry, 0xfff );
84 wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
85 wine_ldt_init_fs( teb->teb_sel, &fs_entry );
86 teb->gs_sel = wine_get_gs();
87 #elif defined(__powerpc__)
88 /* On PowerPC, the current TEB is in the gpr13 register */
89 __asm__ __volatile__("mr 2, %0" : : "r" (teb));
90 #elif defined(HAVE__LWP_CREATE)
91 /* On non-i386 Solaris, we use the LWP private pointer */
92 _lwp_setprivate( teb );
97 /***********************************************************************
98 * call_on_thread_stack
100 * Call a function once we switched to the thread stack.
102 static void call_on_thread_stack( void *func )
106 void (*funcptr)(void) = func;
109 __EXCEPT(UnhandledExceptionFilter)
111 TerminateThread( GetCurrentThread(), GetExceptionCode() );
114 SYSDEPS_ExitThread(0); /* should never get here */
118 /***********************************************************************
121 * Get a temporary stack address to run the thread exit code on.
123 inline static char *get_temp_stack(void)
125 unsigned int next = InterlockedExchangeAdd( &next_temp_stack, 1 );
126 return temp_stacks[next % NB_TEMP_STACKS];
130 /***********************************************************************
133 * Cleanup the remains of a thread. Runs on a temporary stack.
135 static void cleanup_thread( void *ptr )
137 /* copy the info structure since it is on the stack we will free */
138 struct thread_cleanup_info info = *(struct thread_cleanup_info *)ptr;
139 munmap( info.stack_base, info.stack_size );
140 wine_ldt_free_fs( wine_get_fs() );
141 #ifdef HAVE__LWP_CREATE
144 _exit( info.status );
148 /***********************************************************************
149 * SYSDEPS_StartThread
151 * Startup routine for a new thread.
153 static void SYSDEPS_StartThread( TEB *teb )
155 SYSDEPS_SetCurThread( teb );
162 __EXCEPT(UnhandledExceptionFilter)
164 TerminateThread( GetCurrentThread(), GetExceptionCode() );
167 SYSDEPS_ExitThread(0); /* should never get here */
171 /***********************************************************************
172 * SYSDEPS_SpawnThread
174 * Start running a new thread.
175 * Return -1 on error, 0 if OK.
177 int SYSDEPS_SpawnThread( TEB *teb )
180 if (clone( (int (*)(void *))SYSDEPS_StartThread, teb->stack_top,
181 CLONE_VM | CLONE_FS | CLONE_FILES, teb ) < 0)
184 #elif defined(HAVE_RFORK)
185 void **sp = (void **)teb->stack_top;
188 *--sp = SYSDEPS_StartThread;
189 __asm__ __volatile__(
190 "pushl %2;\n\t" /* flags */
191 "pushl $0;\n\t" /* 0 ? */
192 "movl %1,%%eax;\n\t" /* SYS_rfork */
193 ".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
194 "cmpl $0, %%edx;\n\t"
196 "movl %0,%%esp;\n\t" /* child -> new thread */
198 "1:\n\t" /* parent -> caller thread */
200 : "r" (sp), "g" (SYS_rfork), "g" (RFPROC | RFMEM)
203 #elif defined(HAVE__LWP_CREATE)
205 _lwp_makecontext( &context, (void(*)(void *))SYSDEPS_StartThread, teb,
206 NULL, teb->stack_base, (char *)teb->stack_top - (char *)teb->stack_base );
207 if ( _lwp_create( &context, 0, NULL ) )
212 FIXME("CreateThread: stub\n" );
217 /***********************************************************************
218 * SYSDEPS_CallOnStack
220 void DECLSPEC_NORETURN SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg );
223 __ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
224 "movl 4(%esp),%ecx\n\t" /* func */
225 "movl 8(%esp),%edx\n\t" /* arg */
226 ".byte 0x64\n\tmovl 0x04,%esp\n\t" /* teb->stack_top */
230 "int $3" /* we never return here */ );
231 # elif defined(_MSC_VER)
232 __declspec(naked) void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
234 __asm mov ecx, 4[esp];
235 __asm mov edx, 8[esp];
236 __asm mov fs:[0x04], esp;
242 # endif /* defined(__GNUC__) || defined(_MSC_VER) */
243 #elif defined(__sparc__) && defined(__GNUC__)
244 __ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
245 "mov %o0, %l0\n\t" /* store first argument */
246 "call " __ASM_NAME("NtCurrentTeb") ", 0\n\t"
247 "mov %o1, %l1\n\t" /* delay slot: store second argument */
248 "ld [%o0+4], %sp\n\t" /* teb->stack_top */
249 "call %l0, 0\n\t" /* call func */
250 "mov %l1, %o0\n\t" /* delay slot: arg for func */
251 "ta 0x01\n\t"); /* breakpoint - we never get here */
252 #else /* !sparc, !i386 */
253 void SYSDEPS_CallOnStack( void (*func)(LPVOID), LPVOID arg )
256 while(1); /* avoid warning */
258 #endif /* !defined(__i386__) && !defined(__sparc__) */
261 /***********************************************************************
262 * SYSDEPS_SwitchToThreadStack
264 void SYSDEPS_SwitchToThreadStack( void (*func)(void) )
266 SYSDEPS_CallOnStack( call_on_thread_stack, func );
270 /***********************************************************************
273 * Exit a running thread; must not return.
275 void SYSDEPS_ExitThread( int status )
277 TEB *teb = NtCurrentTeb();
278 struct thread_cleanup_info info;
279 MEMORY_BASIC_INFORMATION meminfo;
281 wine_ldt_free_entries( teb->stack_sel, 1 );
282 VirtualQuery( teb->stack_top, &meminfo, sizeof(meminfo) );
283 info.stack_base = meminfo.AllocationBase;
284 info.stack_size = meminfo.RegionSize + ((char *)teb->stack_top - (char *)meminfo.AllocationBase);
285 info.status = status;
290 VirtualFree( teb->stack_base, 0, MEM_RELEASE | MEM_SYSTEM );
291 close( teb->wait_fd[0] );
292 close( teb->wait_fd[1] );
293 close( teb->reply_fd );
294 close( teb->request_fd );
295 teb->stack_low = get_temp_stack();
296 teb->stack_top = (char *) teb->stack_low + TEMP_STACK_SIZE;
297 SYSDEPS_CallOnStack( cleanup_thread, &info );
301 /***********************************************************************
302 * SYSDEPS_AbortThread
304 * Same as SYSDEPS_ExitThread, but must not do anything that requires a server call.
306 void SYSDEPS_AbortThread( int status )
310 close( NtCurrentTeb()->wait_fd[0] );
311 close( NtCurrentTeb()->wait_fd[1] );
312 close( NtCurrentTeb()->reply_fd );
313 close( NtCurrentTeb()->request_fd );
314 #ifdef HAVE__LWP_CREATE
317 for (;;) /* avoid warning */
322 /**********************************************************************
323 * NtCurrentTeb (NTDLL.@)
325 * This will crash and burn if called before threading is initialized
327 #if defined(__i386__) && defined(__GNUC__)
328 __ASM_GLOBAL_FUNC( NtCurrentTeb, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" );
329 #elif defined(__i386__) && defined(_MSC_VER)
330 /* Nothing needs to be done. MS C "magically" exports the inline version from winnt.h */
331 #elif defined(HAVE__LWP_CREATE)
332 /***********************************************************************
333 * NtCurrentTeb (NTDLL.@)
335 struct _TEB * WINAPI NtCurrentTeb(void)
337 extern void *_lwp_getprivate(void);
338 return (struct _TEB *)_lwp_getprivate();
340 #elif defined(__powerpc__)
341 __ASM_GLOBAL_FUNC( NtCurrentTeb, "\n\tmr 3,2\n\tblr" );
343 # error NtCurrentTeb not defined for this architecture
344 #endif /* __i386__ */