syscall_emul: adding symlink system call

Change-Id: Iebda05c130b4d2ee8434cad1e703933bfda486c8
Reviewed-on: https://gem5-review.googlesource.com/11490
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index c56963acf..dd2323eaa 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -540,6 +540,26 @@ linkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc)
 }
 
 SyscallReturn
+symlinkFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc)
+{
+    string path;
+    string new_path;
+
+    int index = 0;
+    auto &virt_mem = tc->getMemProxy();
+    if (!virt_mem.tryReadString(path, p->getSyscallArg(tc, index)))
+        return -EFAULT;
+    if (!virt_mem.tryReadString(new_path, p->getSyscallArg(tc, index)))
+        return -EFAULT;
+
+    path = p->fullPath(path);
+    new_path = p->fullPath(new_path);
+
+    int result = symlink(path.c_str(), new_path.c_str());
+    return (result == -1) ? -errno : result;
+}
+
+SyscallReturn
 mkdirFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc)
 {
     string path;