linux-user: fadvise64 implementation

good enough to pass all LTP fadvise64 tests

Signed-off-by: Ulrich Hecht <uli@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index a7de1547038e5e9ed3e75fa309a254de2f5359fb..7eb09fa8d71b74752f35bfec7d7947e2d04ed972 100644 (file)
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6567,12 +6567,23 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
                arg4 = temp;
        }
 #endif
-#if defined(TARGET_NR_fadvise64_64) || defined(TARGET_NR_arm_fadvise64_64)
+#if defined(TARGET_NR_fadvise64_64) || defined(TARGET_NR_arm_fadvise64_64) || defined(TARGET_NR_fadvise64)
 #ifdef TARGET_NR_fadvise64_64
     case TARGET_NR_fadvise64_64:
 #endif
-        /* This is a hint, so ignoring and returning success is ok.  */
-       ret = get_errno(0);
+#ifdef TARGET_NR_fadvise64
+    case TARGET_NR_fadvise64:
+#endif
+#ifdef TARGET_S390X
+        switch (arg4) {
+        case 4: arg4 = POSIX_FADV_NOREUSE + 1; break; /* make sure it's an invalid value */
+        case 5: arg4 = POSIX_FADV_NOREUSE + 2; break; /* ditto */
+        case 6: arg4 = POSIX_FADV_DONTNEED; break;
+        case 7: arg4 = POSIX_FADV_NOREUSE; break;
+        default: break;
+        }
+#endif
+        ret = -posix_fadvise(arg1, arg2, arg3, arg4);
        break;
 #endif
 #ifdef TARGET_NR_madvise