From a3fe4c06620439aa317f257d3bcdde34508d3d43 Mon Sep 17 00:00:00 2001
From: Michael Adler <Michael.Adler@intel.com>
Date: Mon, 20 Oct 2014 16:44:53 -0500
Subject: sim: implement getdents/getdents64 in user mode

Has been tested only for alpha.
Committed by: Nilay Vaish <nilay@cs.wisc.edu>
---
 src/sim/syscall_emul.cc | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'src/sim/syscall_emul.cc')

diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index d8df891dd..7eeacd319 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -31,6 +31,7 @@
 
 #include <fcntl.h>
 #include <unistd.h>
+#include <sys/syscall.h>
 
 #include <cstdio>
 #include <iostream>
@@ -867,6 +868,41 @@ cloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
     }
 }
 
+SyscallReturn
+getdentsFunc(SyscallDesc *desc, int num, LiveProcess *p,
+             ThreadContext *tc)
+{
+    int index = 0;
+    int fd = p->sim_fd(p->getSyscallArg(tc, index));
+    Addr bufPtr = p->getSyscallArg(tc, index);
+    int nbytes = p->getSyscallArg(tc, index);
+    BufferArg bufArg(bufPtr, nbytes);
+
+    int bytes_read = syscall(SYS_getdents, fd, bufArg.bufferPtr(), nbytes);
+
+    if (bytes_read != -1)
+        bufArg.copyOut(tc->getMemProxy());
+
+    return bytes_read;
+}
+
+SyscallReturn
+getdents64Func(SyscallDesc *desc, int num, LiveProcess *p,
+               ThreadContext *tc)
+{
+    int index = 0;
+    int fd = p->sim_fd(p->getSyscallArg(tc, index));
+    Addr bufPtr = p->getSyscallArg(tc, index);
+    int nbytes = p->getSyscallArg(tc, index);
+    BufferArg bufArg(bufPtr, nbytes);
+
+    int bytes_read = syscall(SYS_getdents64, fd, bufArg.bufferPtr(), nbytes);
+
+    if (bytes_read != -1)
+        bufArg.copyOut(tc->getMemProxy());
+
+    return bytes_read;
+}
 SyscallReturn
 accessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc,
         int index)
-- 
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