linux-user/include/special-errno.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * QEMU internal errno values for implementing user-only POSIX.
   4  *
   5  *  Copyright (c) 2003 Fabrice Bellard
   6  *  Copyright (c) 2021 Linaro, Ltd.
   7  */
   8
   9 #ifndef SPECIAL_ERRNO_H
  10 #define SPECIAL_ERRNO_H
  11
  12 /*
  13  * All of these are QEMU internal, not visible to the guest.
  14  * They should be chosen so as to not overlap with any host
  15  * or guest errno.
  16  */
  17
  18 /*
  19  * This is returned when a system call should be restarted, to tell the
  20  * main loop that it should wind the guest PC backwards so it will
  21  * re-execute the syscall after handling any pending signals.
  22  */
  23 #define QEMU_ERESTARTSYS  512
  24
  25 /*
  26  * This is returned after a successful sigreturn syscall, to indicate
  27  * that it has correctly set the guest registers and so the main loop
  28  * should not touch them.
  29  */
  30 #define QEMU_ESIGRETURN   513
  31
  32 #endif /* SPECIAL_ERRNO_H */