arm: Add unlinkat syscall implementation

added ARM aarch64 unlinkat syscall support, modeled on other <xxx>at syscalls.
This gets all of the cpu2006 int workloads passing in SE mode on aarch64.

Committed by: Nilay Vaish <nilay@cs.wisc.edu>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index 37d0121c5..bf7efe210 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -400,9 +400,15 @@ readlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc,
 SyscallReturn
 unlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
+    return unlinkHelper(desc, num, p, tc, 0);
+}
+
+SyscallReturn
+unlinkHelper(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc,
+           int index)
+{
     string path;
 
-    int index = 0;
     if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index)))
         return -EFAULT;