Spawn Processes using memory primitives rather than and elf loader.

This allows us to remove the temporary syscall for that style of process
spawn.

zion/usr/zcall_internal.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#include <stdint.h>
+
+struct ZProcessSpawnReq {
+  uint64_t proc_cap;
+};
+
+struct ZProcessSpawnResp {
+  uint64_t proc_cap;
+  uint64_t as_cap;
+};
+
+struct ZThreadCreateReq {
+  uint64_t proc_cap;
+};
+
+struct ZThreadCreateResp {
+  uint64_t thread_cap;
+};
+
+struct ZThreadStartReq {
+  uint64_t thread_cap;
+  uint64_t entry;
+  uint64_t arg1;
+  uint64_t arg2;
+};
+
+struct ZAddressSpaceMapReq {
+  uint64_t as_cap;
+  uint64_t offset;
+  uint64_t mem_cap;
+};
+
+struct ZAddressSpaceMapResp {
+  uint64_t vaddr;
+};
+
+struct ZMemoryObjectCreateReq {
+  uint64_t size;
+};
+
+struct ZMemoryObjectCreateResp {
+  uint64_t mem_cap;
+};