1 5093c3fa 2004-10-22 devnull #if defined(__linux__)
 2 c6687d45 2004-09-21 devnull #include "ucontext.c"
 3 5093c3fa 2004-10-22 devnull #else
 4 c6687d45 2004-09-21 devnull 
 5 76193d7c 2003-09-30 devnull #include "threadimpl.h"
 6 a3785ca2 2004-04-21 devnull /*
 7 a3785ca2 2004-04-21 devnull  * To use this you need some patches to Valgrind that
 8 a3785ca2 2004-04-21 devnull  * let it help out with detecting stack overflow. 
 9 a3785ca2 2004-04-21 devnull  */
10 a3785ca2 2004-04-21 devnull #ifdef USEVALGRIND
11 a3785ca2 2004-04-21 devnull #include <valgrind/memcheck.h>
12 a3785ca2 2004-04-21 devnull #endif
13 76193d7c 2003-09-30 devnull 
14 76193d7c 2003-09-30 devnull static void
15 76193d7c 2003-09-30 devnull launcher386(void (*f)(void *arg), void *arg)
16 76193d7c 2003-09-30 devnull {
17 a3785ca2 2004-04-21 devnull 	Proc *p;
18 a3785ca2 2004-04-21 devnull 	Thread *t;
19 a3785ca2 2004-04-21 devnull 
20 a3785ca2 2004-04-21 devnull 	p = _threadgetproc();
21 a3785ca2 2004-04-21 devnull 	t = p->thread;
22 c4097c29 2004-05-11 devnull 	_threadstacklimit(t->stk, t->stk+t->stksize);
23 a3785ca2 2004-04-21 devnull 
24 76193d7c 2003-09-30 devnull 	(*f)(arg);
25 76193d7c 2003-09-30 devnull 	threadexits(nil);
26 76193d7c 2003-09-30 devnull }
27 76193d7c 2003-09-30 devnull 
28 76193d7c 2003-09-30 devnull void
29 76193d7c 2003-09-30 devnull _threadinitstack(Thread *t, void (*f)(void*), void *arg)
30 76193d7c 2003-09-30 devnull {
31 76193d7c 2003-09-30 devnull 	ulong *tos;
32 76193d7c 2003-09-30 devnull 
33 76193d7c 2003-09-30 devnull 	tos = (ulong*)&t->stk[t->stksize&~7];
34 76193d7c 2003-09-30 devnull 	*--tos = (ulong)arg;
35 76193d7c 2003-09-30 devnull 	*--tos = (ulong)f;
36 76193d7c 2003-09-30 devnull 	t->sched.pc = (ulong)launcher386;
37 76193d7c 2003-09-30 devnull 	t->sched.sp = (ulong)tos - 8;		/* old PC and new PC */
38 76193d7c 2003-09-30 devnull }
39 76193d7c 2003-09-30 devnull 
40 a3785ca2 2004-04-21 devnull void
41 a3785ca2 2004-04-21 devnull _threadinswitch(int enter)
42 a3785ca2 2004-04-21 devnull {
43 a3785ca2 2004-04-21 devnull 	USED(enter);
44 a3785ca2 2004-04-21 devnull #ifdef USEVALGRIND
45 a3785ca2 2004-04-21 devnull 	if(enter)
46 a3785ca2 2004-04-21 devnull 		VALGRIND_SET_STACK_LIMIT(0, 0, 0);
47 c4097c29 2004-05-11 devnull 	else
48 c4097c29 2004-05-11 devnull 		VALGRIND_SET_STACK_LIMIT(0, 0, 1);
49 a3785ca2 2004-04-21 devnull #endif
50 a3785ca2 2004-04-21 devnull }
51 a3785ca2 2004-04-21 devnull 
52 a3785ca2 2004-04-21 devnull void
53 c4097c29 2004-05-11 devnull _threadstacklimit(void *bottom, void *top)
54 a3785ca2 2004-04-21 devnull {
55 c4097c29 2004-05-11 devnull 	USED(bottom);
56 c4097c29 2004-05-11 devnull 	USED(top);
57 a3785ca2 2004-04-21 devnull 
58 a3785ca2 2004-04-21 devnull #ifdef USEVALGRIND
59 c4097c29 2004-05-11 devnull 	VALGRIND_SET_STACK_LIMIT(1, bottom, top);
60 a3785ca2 2004-04-21 devnull #endif
61 a3785ca2 2004-04-21 devnull }
62 c6687d45 2004-09-21 devnull #endif