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#include "threadimpl.h"
static void
launchersparc(uint o0, uint o1, uint o2, uint o3,
uint o4, uint o5, uint o6, uint o7,
void (*f)(void *arg), void *arg)
{
if(0) print("ls %x %x %x %x %x %x %x %x %x %x at %x\n",
o0, o1, o2, o3, o4, o5, o6, o7, f, arg, &o0);
(*f)(arg);
threadexits(nil);
}
void
_threadinitstack(Thread *t, void (*f)(void*), void *arg)
{
ulong *tos, *stk;
/*
* This is a bit more complicated than it should be,
* because we need to set things up so that gotolabel
* (which executes a return) gets us into launchersparc.
* So all the registers are going to be renamed before
* we get there. The input registers here become the
* output registers there, which is useless.
* The input registers there are inaccessible, so we
* have to give launchersparc enough arguments that
* everything ends up in the stack.
*/
tos = (ulong*)&t->stk[t->stksize&~7];
stk = tos;
--stk;
*--stk = (ulong)arg;
*--stk = (ulong)f;
stk -= 25; /* would love to understand this */
t->sched.link = (ulong)launchersparc - 8;
t->sched.input[6] = 0;
t->sched.sp = (ulong)stk;
if(0) print("tis %x %x at %x\n", f, arg, t->sched.sp);
}
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