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#include <u.h>
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#include <libc.h>
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#include <thread.h>
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#include "threadimpl.h"
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/* first argument goes in a register; simplest just to ignore it */
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static void
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launcheramd64(int, void (*f)(void *arg), void *arg)
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{
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	(*f)(arg);
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	threadexits(nil);
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}
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void
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_threadinitstack(Thread *t, void (*f)(void*), void *arg)
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{
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	uvlong *tos;
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	tos = (uvlong*)&t->stk[t->stksize&~7];
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	*--tos = (uvlong)arg;
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	*--tos = (uvlong)f;
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	*--tos = 0;	/* first arg to launcheramd64 */
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	t->sched[JMPBUFPC] = (uvlong)launcheramd64+JMPBUFDPC;
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	t->sched[JMPBUFSP] = (uvlong)tos - 2*8;		/* old PC and new PC */
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}
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