ref: 57741d473f9d5165d142b165bd837984f6428c66
dir: /sys/src/libthread/amd64.c/
#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 launcheramd64(int, void (*f)(void *arg), void *arg) { (*f)(arg); threadexits(nil); } void _threadinitstack(Thread *t, void (*f)(void*), void *arg) { uvlong *tos; tos = (uvlong*)&t->stk[t->stksize&~7]; *--tos = (uvlong)arg; *--tos = (uvlong)f; *--tos = 0; /* first arg to launcheramd64 */ t->sched[JMPBUFPC] = (uvlong)launcheramd64+JMPBUFDPC; t->sched[JMPBUFSP] = (uvlong)tos - 2*8; /* old PC and new PC */ }