linux-user: Implement *listxattr syscalls

Implement listxattr, flistxattr and llistxattr syscalls.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 762115b..ee8899e 100644 (file)
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7798,9 +7798,43 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
 #ifdef TARGET_NR_setxattr
     case TARGET_NR_listxattr:
     case TARGET_NR_llistxattr:
+    {
+        void *p, *b = 0;
+        if (arg2) {
+            b = lock_user(VERIFY_WRITE, arg2, arg3, 0);
+            if (!b) {
+                ret = -TARGET_EFAULT;
+                break;
+            }
+        }
+        p = lock_user_string(arg1);
+        if (p) {
+            if (num == TARGET_NR_listxattr) {
+                ret = get_errno(listxattr(p, b, arg3));
+            } else {
+                ret = get_errno(llistxattr(p, b, arg3));
+            }
+        } else {
+            ret = -TARGET_EFAULT;
+        }
+        unlock_user(p, arg1, 0);
+        unlock_user(b, arg2, arg3);
+        break;
+    }
     case TARGET_NR_flistxattr:
-        ret = -TARGET_EOPNOTSUPP;
+    {
+        void *b = 0;
+        if (arg2) {
+            b = lock_user(VERIFY_WRITE, arg2, arg3, 0);
+            if (!b) {
+                ret = -TARGET_EFAULT;
+                break;
+            }
+        }
+        ret = get_errno(flistxattr(arg1, b, arg3));
+        unlock_user(b, arg2, arg3);
         break;
+    }
     case TARGET_NR_setxattr:
     case TARGET_NR_lsetxattr:
         {