ref: dfd915892a662216fa1f422ea56b89c8b34e3175
parent: a3b9243f715e772329e7829c6778168e7e443a86
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Fri May 3 17:03:12 EDT 2019
libthread: initial support for arm64
--- /dev/null
+++ b/sys/src/libthread/arm64.c
@@ -1,0 +1,28 @@
+#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;
+}
+