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#include <u.h>
#include <libc.h>
#include <thread.h>
#include "threadimpl.h"
/* first argument goes in a register; simplest just to ignore it */
static void
launcherarm64(int, void (*f)(void *arg), void *arg)
{
(*f)(arg);
threadexits(nil);
}
void
_threadinitstack(Thread *t, void (*f)(void*), void *arg)
{
uintptr *tos;
tos = (uintptr*)&t->stk[t->stksize&~15];
*--tos = (uintptr)arg;
*--tos = (uintptr)f;
*--tos = 0; /* first arg to launcherarm64 */
*--tos = 0; /* place to store return PC */
t->sched[JMPBUFPC] = (uintptr)launcherarm64+JMPBUFDPC;
t->sched[JMPBUFSP] = (uintptr)tos;
}
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