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