ref: 1470d22cdbebc9c0c18a590891f2d43d1646f4bd
dir: /sys/src/libthread/arm64.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 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; }