[mirror_qemu.git] / linux-user / special-errno.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * QEMU internal errno values for implementing user-only POSIX.
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *  Copyright (c) 2021 Linaro, Ltd.
 */

#ifndef SPECIAL_ERRNO_H
#define SPECIAL_ERRNO_H

/*
 * All of these are QEMU internal, not visible to the guest.
 * They should be chosen so as to not overlap with any host
 * or guest errno.
 */

/*
 * This is returned when a system call should be restarted, to tell the
 * main loop that it should wind the guest PC backwards so it will
 * re-execute the syscall after handling any pending signals.
 */
#define QEMU_ERESTARTSYS  512

/*
 * This is returned after a successful sigreturn syscall, to indicate
 * that it has correctly set the guest registers and so the main loop
 * should not touch them.
 */
#define QEMU_ESIGRETURN   513

#endif /* SPECIAL_ERRNO_H */
Commit	Line	Data
5da4063f RH	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 */