arm64: Add support for system calls (SVC)

src/device/arm64/arm64.go

@@ -0,0 +1,36 @@
+package arm64
+
+// Run the given assembly code. The code will be marked as having side effects,
+// as it doesn't produce output and thus would normally be eliminated by the
+// optimizer.
+func Asm(asm string)
+
+// Run the given inline assembly. The code will be marked as having side
+// effects, as it would otherwise be optimized away. The inline assembly string
+// recognizes template values in the form {name}, like so:
+//
+//     arm.AsmFull(
+//         "str {value}, {result}",
+//         map[string]interface{}{
+//             "value":  1
+//             "result": &dest,
+//         })
+//
+// You can use {} in the asm string (which expands to a register) to set the
+// return value.
+func AsmFull(asm string, regs map[string]interface{}) uintptr
+
+// Run the following system call (SVCall) with 0 arguments.
+func SVCall0(num uintptr) uintptr
+
+// Run the following system call (SVCall) with 1 argument.
+func SVCall1(num uintptr, a1 interface{}) uintptr
+
+// Run the following system call (SVCall) with 2 arguments.
+func SVCall2(num uintptr, a1, a2 interface{}) uintptr
+
+// Run the following system call (SVCall) with 3 arguments.
+func SVCall3(num uintptr, a1, a2, a3 interface{}) uintptr
+
+// Run the following system call (SVCall) with 4 arguments.
+func SVCall4(num uintptr, a1, a2, a3, a4 interface{}) uintptr