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 */ 33