bsd-user: Implement freebsd11_mknod, freebsd11_mknodat and mknodat

These implement both the old-pre INO64 mknod variations, as well as the
now current INO64 variant. Make direct syscall calls for these older
syscalls to avloid too many dependencies.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Michal Meloun <mmel@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

bsd-user/bsd-file.h

@@ -721,4 +721,51 @@ static abi_long do_bsd_fchmodat(abi_long arg1, abi_long arg2,
     return ret;
 }
 
+/* pre-ino64 mknod(2) */
+static abi_long do_bsd_freebsd11_mknod(abi_long arg1, abi_long arg2, abi_long arg3)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg1);
+    ret = get_errno(syscall(SYS_freebsd11_mknod, p, arg2, arg3));
+    UNLOCK_PATH(p, arg1);
+
+    return ret;
+}
+
+/* pre-ino64 mknodat(2) */
+static abi_long do_bsd_freebsd11_mknodat(abi_long arg1, abi_long arg2,
+        abi_long arg3, abi_long arg4)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg2);
+    ret = get_errno(syscall(SYS_freebsd11_mknodat, arg1, p, arg3, arg4));
+    UNLOCK_PATH(p, arg2);
+
+    return ret;
+}
+
+/* post-ino64 mknodat(2) */
+static abi_long do_bsd_mknodat(void *cpu_env, abi_long arg1,
+        abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5,
+        abi_long arg6)
+{
+    abi_long ret;
+    void *p;
+
+    LOCK_PATH(p, arg2);
+       /* 32-bit arch's use two 32 registers for 64 bit return value */
+    if (regpairs_aligned(cpu_env) != 0) {
+        ret = get_errno(mknodat(arg1, p, arg3, target_arg64(arg5, arg6)));
+    } else {
+        ret = get_errno(mknodat(arg1, p, arg3, target_arg64(arg4, arg5)));
+    }
+    UNLOCK_PATH(p, arg2);
+
+    return ret;
+}
+
 #endif /* BSD_FILE_H */

bsd-user/freebsd/os-syscall.c

@@ -32,6 +32,7 @@
 #include "qemu/cutils.h"
 #include "qemu/path.h"
 #include <sys/syscall.h>
+#include <sys/cdefs.h>
 #include <sys/param.h>
 #include <sys/mount.h>
 #include <sys/sysctl.h>
@@ -418,6 +419,18 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
         ret = do_bsd_fchmodat(arg1, arg2, arg3, arg4);
         break;
 
+    case TARGET_FREEBSD_NR_freebsd11_mknod: /* mknod(2) */
+        ret = do_bsd_freebsd11_mknod(arg1, arg2, arg3);
+        break;
+
+    case TARGET_FREEBSD_NR_freebsd11_mknodat: /* mknodat(2) */
+        ret = do_bsd_freebsd11_mknodat(arg1, arg2, arg3, arg4);
+        break;
+
+    case TARGET_FREEBSD_NR_mknodat: /* mknodat(2) */
+        ret = do_bsd_mknodat(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
+        break;
+
     default:
         qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num);
         ret = -TARGET_ENOSYS;