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64-bit nonsense

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rsc 2005-01-18 05:57:35 +00:00
parent ded42a6ea9
commit 8650250482
1 changed files with 19 additions and 3 deletions
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22
src/libthread/thread.c
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@ -77,11 +77,16 @@ procalloc(void)
} }
static void static void
threadstart(void *v) threadstart(uint y, uint x)
{ {
_Thread *t; _Thread *t;
ulong z;
z = x<<16; /* hide undefined 32-bit shift from 32-bit compilers */
z <<= 16;
z |= y;
t = (_Thread*)z;
t = v;
//print("threadstart %p\n", v); //print("threadstart %p\n", v);
t->startfn(t->startarg); t->startfn(t->startarg);
//print("threadexits %p\n", v); //print("threadexits %p\n", v);
@ -94,6 +99,8 @@ threadalloc(void (*fn)(void*), void *arg, uint stack)
{ {
_Thread *t; _Thread *t;
sigset_t zero; sigset_t zero;
uint x, y;
ulong z;
/* allocate the task and stack together */ /* allocate the task and stack together */
t = malloc(sizeof *t+stack); t = malloc(sizeof *t+stack);
@ -125,7 +132,16 @@ threadalloc(void (*fn)(void*), void *arg, uint stack)
(char*)t->context.uc.uc_stack.ss_sp (char*)t->context.uc.uc_stack.ss_sp
+t->context.uc.uc_stack.ss_size; +t->context.uc.uc_stack.ss_size;
#endif #endif
makecontext(&t->context.uc, (void(*)())threadstart, 1, t); /*
* All this magic is because you have to pass makecontext a
* function that takes some number of word-sized variables,
* and on 64-bit machines pointers are bigger than words.
*/
z = (ulong)t;
y = z;
z >>= 16; /* hide undefined 32-bit shift from 32-bit compilers */
x = z>>16;
makecontext(&t->context.uc, (void(*)())threadstart, 2, y, x);
return t; return t;
} }