2 * System-dependent scheduler support
4 * Copyright 1998 Alexandre Julliard
13 #include <sys/resource.h>
14 #ifdef HAVE_SYS_SYSCALL_H
15 # include <sys/syscall.h>
20 #ifdef HAVE_UCONTEXT_H
21 # include <ucontext.h>
23 #include "wine/port.h"
27 #include "wine/exception.h"
28 #include "debugtools.h"
30 DEFAULT_DEBUG_CHANNEL(thread);
37 # define CLONE_VM 0x00000100
38 # define CLONE_FS 0x00000200
39 # define CLONE_FILES 0x00000400
40 # define CLONE_SIGHAND 0x00000800
41 # define CLONE_PID 0x00001000
42 # endif /* CLONE_VM */
45 /***********************************************************************
46 * SYSDEPS_SetCurThread
48 * Make 'thread' the current thread.
50 void SYSDEPS_SetCurThread( TEB *teb )
53 /* On the i386, the current thread is in the %fs register */
54 __set_fs( teb->teb_sel );
55 #elif defined(HAVE__LWP_CREATE)
56 /* On non-i386 Solaris, we use the LWP private pointer */
57 _lwp_setprivate( teb );
61 /***********************************************************************
64 * Startup routine for a new thread.
66 static void SYSDEPS_StartThread( TEB *teb )
68 SYSDEPS_SetCurThread( teb );
75 __EXCEPT(UnhandledExceptionFilter)
77 TerminateThread( GetCurrentThread(), GetExceptionCode() );
80 SYSDEPS_ExitThread(0); /* should never get here */
84 /***********************************************************************
87 * Start running a new thread.
88 * Return -1 on error, 0 if OK.
90 int SYSDEPS_SpawnThread( TEB *teb )
95 const int flags = CLONE_VM | CLONE_FS | CLONE_FILES | SIGCHLD;
96 if (clone( (int (*)(void *))SYSDEPS_StartThread, teb->stack_top, flags, teb ) < 0)
98 if (!(flags & CLONE_FILES)) close( teb->request_fd ); /* close the child socket in the parent */
103 const int flags = RFPROC | RFMEM; /*|RFFDG*/
104 void **sp = (void **)teb->stack_top;
107 *--sp = SYSDEPS_StartThread;
108 __asm__ __volatile__(
109 "pushl %2;\n\t" /* flags */
110 "pushl $0;\n\t" /* 0 ? */
111 "movl %1,%%eax;\n\t" /* SYS_rfork */
112 ".byte 0x9a; .long 0; .word 7;\n\t" /* lcall 7:0... FreeBSD syscall */
113 "cmpl $0, %%edx;\n\t"
115 "movl %0,%%esp;\n\t" /* child -> new thread */
117 "1:\n\t" /* parent -> caller thread */
119 : "r" (sp), "g" (SYS_rfork), "g" (flags)
121 if (flags & RFFDG) close( teb->request_fd ); /* close the child socket in the parent */
125 #ifdef HAVE__LWP_CREATE
127 _lwp_makecontext( &context, (void(*)(void *))SYSDEPS_StartThread, teb,
128 NULL, teb->stack_base, (char *)teb->stack_top - (char *)teb->stack_base );
129 if ( _lwp_create( &context, 0, NULL ) )
134 #endif /* ERRNO_LOCATION */
136 FIXME("CreateThread: stub\n" );
142 /***********************************************************************
145 * Exit a running thread; must not return.
147 void SYSDEPS_ExitThread( int status )
149 int fd = NtCurrentTeb()->request_fd;
150 NtCurrentTeb()->request_fd = -1;
152 #ifdef HAVE__LWP_CREATE
157 * It is of course impossible to come here,
158 * but it eliminates a compiler warning.
164 /***********************************************************************
165 * SYSDEPS_CallOnStack
167 int SYSDEPS_DoCallOnStack( int (*func)(LPVOID), LPVOID arg )
175 __EXCEPT(UnhandledExceptionFilter)
177 TerminateThread( GetCurrentThread(), GetExceptionCode() );
186 int SYSDEPS_CallOnStack( LPVOID stackTop, LPVOID stackLow,
187 int (*func)(LPVOID), LPVOID arg );
188 __ASM_GLOBAL_FUNC( SYSDEPS_CallOnStack,
190 "movl %esp, %ebp\n\t"
191 ".byte 0x64; pushl 0x04\n\t"
192 ".byte 0x64; pushl 0x08\n\t"
193 "movl 8(%ebp), %esp\n\t"
194 "movl 12(%ebp), %eax\n\t"
195 ".byte 0x64; movl %esp, 0x04\n\t"
196 ".byte 0x64; movl %eax, 0x08\n\t"
199 "call " __ASM_NAME("SYSDEPS_DoCallOnStack") "\n\t"
200 "leal -8(%ebp), %esp\n\t"
201 ".byte 0x64; popl 0x08\n\t"
202 ".byte 0x64; popl 0x04\n\t"
206 int SYSDEPS_CallOnStack( LPVOID stackTop, LPVOID stackLow,
207 int (*func)(LPVOID), LPVOID arg )
209 return SYSDEPS_DoCallOnStack( func, arg );
213 /***********************************************************************
214 * SYSDEPS_SwitchToThreadStack
216 void SYSDEPS_SwitchToThreadStack( void (*func)(void) )
218 DWORD page_size = getpagesize();
219 DWORD cur_stack = (((DWORD)&func) + (page_size-1)) & ~(page_size-1);
221 TEB *teb = NtCurrentTeb();
222 LPVOID stackTop = teb->stack_top;
223 LPVOID stackLow = teb->stack_low;
227 if ( getrlimit(RLIMIT_STACK, &rl) < 0 )
229 WARN("Can't get rlimit\n");
230 rl.rlim_cur = 8*1024*1024;
233 teb->stack_top = (LPVOID) cur_stack;
234 teb->stack_low = (LPVOID)(cur_stack - rl.rlim_cur);
236 SYSDEPS_CallOnStack( stackTop, stackLow,
237 (int (*)(void *))func, NULL );
240 /**********************************************************************
241 * NtCurrentTeb (NTDLL.@)
243 * This will crash and burn if called before threading is initialized
246 __ASM_GLOBAL_FUNC( NtCurrentTeb, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" );
247 #elif defined(HAVE__LWP_CREATE)
248 struct _TEB * WINAPI NtCurrentTeb(void)
250 extern void *_lwp_getprivate(void);
251 return (struct _TEB *)_lwp_getprivate();
254 # error NtCurrentTeb not defined for this architecture
255 #endif /* __i386__ */