common-user/safe-syscall-error.c

   1 /*
   2  * safe-syscall-error.c: errno setting fragment
   3  * This is intended to be invoked by safe-syscall.S
   4  *
   5  * Written by Richard Henderson <rth@twiddle.net>
   6  * Copyright (C) 2021 Red Hat, Inc.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "user/safe-syscall.h"
  14
  15 /*
  16  * This is intended to be invoked via tail-call on the error path
  17  * from the assembly in host/arch/safe-syscall.inc.S.  This takes
  18  * care of the host specific addressing of errno.
  19  * Return -1 to finalize the return value for safe_syscall_base.
  20  */
  21 long safe_syscall_set_errno_tail(int value)
  22 {
  23     errno = value;
  24     return -1;
  25 }