[zion] Migrate process syscalls to new format.

zion/syscall/process.cpp

@@ -0,0 +1,38 @@
+#include "syscall/process.h"
+
+#include "scheduler/process_manager.h"
+#include "scheduler/scheduler.h"
+#include "syscall/syscall.h"
+
+z_err_t ProcessExit(ZProcessExitReq* req) {
+  auto curr_thread = gScheduler->CurrentThread();
+  dbgln("Exit code: %x", req->code);
+  // FIXME: kill process here.
+  curr_thread->Exit();
+  panic("Returned from thread exit");
+  return Z_ERR_UNIMPLEMENTED;
+}
+
+z_err_t ProcessSpawn(ZProcessSpawnReq* req) {
+  auto& curr_proc = gScheduler->CurrentProcess();
+  auto cap = curr_proc.GetCapability(req->proc_cap);
+  RET_ERR(ValidateCap(cap, ZC_PROC_SPAWN_PROC));
+
+  RefPtr<Process> proc = Process::Create();
+  gProcMan->InsertProcess(proc);
+
+  *req->new_proc_cap = curr_proc.AddNewCapability(
+      proc, ZC_PROC_SPAWN_PROC | ZC_PROC_SPAWN_THREAD | ZC_WRITE);
+  *req->new_vmas_cap = curr_proc.AddNewCapability(proc->vmas(), ZC_WRITE);
+
+  if (req->bootstrap_cap != 0) {
+    auto cap = curr_proc.ReleaseCapability(req->bootstrap_cap);
+    if (!cap) {
+      return Z_ERR_CAP_NOT_FOUND;
+    }
+    // FIXME: Check permissions.
+    *req->new_bootstrap_cap = proc->AddExistingCapability(cap);
+  }
+
+  return Z_OK;
+}