syscall_emul: [PATCH 15/22] add clone/execve for threading and multiprocess simulations

Modifies the clone system call and adds execve system call. Requires allowing
processes to steal thread contexts from other processes in the same system
object and the ability to detach pieces of process state (such as MemState)
to allow dynamic sharing.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/cpu/thread_state.hh b/src/cpu/thread_state.hh
index 3a35d444a..5cbc3322b 100644
--- a/src/cpu/thread_state.hh
+++ b/src/cpu/thread_state.hh
@@ -107,6 +107,21 @@ struct ThreadState : public Serializable {
 
     Process *getProcessPtr() { return process; }
 
+    void setProcessPtr(Process *p)
+    {
+        process = p;
+        /**
+         * When the process pointer changes while operating in SE Mode,
+         * the se translating port proxy needs to be reinitialized since it
+         * holds a pointer to the process class.
+         */
+        if (proxy) {
+            delete proxy;
+            proxy = NULL;
+            initMemProxies(NULL);
+        }
+    }
+
     SETranslatingPortProxy &getMemProxy();
 
     /** Reads the number of instructions functionally executed and