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bsd-user: ioctl: add common definitions

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Modeled on sys/ioccom.h.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
This commit is contained in:
Stacey Son
2026-04-30 20:36:46 -06:00
committed by Warner Losh
parent af1520207b
commit 844a31daa2
1 changed files with 43 additions and 0 deletions
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43
bsd-user/freebsd/os-ioctl-ioccom.h Normal file
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/*
* FreeBSD ioccom definitions for ioctl(2) emulation
*
* Copyright (c) 2013 Stacey D. Son
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef BSD_USER_FREEBSD_OS_IOCTL_IOCCOM_H
#define BSD_USER_FREEBSD_OS_IOCTL_IOCCOM_H
/*
* Ioctl's have the command encoded in the lower word, and the size of
* any in or out parameters in the upper word. The high 3 bits of the
* upper word are used to encode the in/out status of the parameter.
*/
/* number of bits for ioctl size */
#define TARGET_IOCPARM_SHIFT 13
/* parameter length mask */
#define TARGET_IOCPARM_MASK ((1 << TARGET_IOCPARM_SHIFT) - 1)
#define TARGET_IOCPARM_LEN(x) (((x) >> 16) & TARGET_IOCPARM_MASK)
#define TARGET_IOCBASECMD(x) ((x) & ~(TARGET_IOCPARM_MASK << 16))
#define TARGET_IOCGROUP(x) (((x) >> 8) & 0xff)
#define TARGET_IOCPARM_MAX (1 << TARGET_IOCPARM_SHIFT) /* max size of ioctl */
#define TARGET_IOC_VOID 0x20000000 /* no parameters */
#define TARGET_IOC_OUT 0x40000000 /* copy out parameters */
#define TARGET_IOC_IN 0x80000000 /* copy in parameters */
#define TARGET_IOC_INOUT (TARGET_IOC_IN | TARGET_IOC_OUT)
#define TARGET_IOC_DIRMASK (TARGET_IOC_VOID | TARGET_IOC_OUT | TARGET_IOC_IN)
#define TARGET_IOC(inout, group, num, len) ((abi_ulong) \
((inout) | (((len) & TARGET_IOCPARM_MASK) << 16) | ((group) << 8) \
| (num)))
#define TARGET_IO(g, n) TARGET_IOC(TARGET_IOC_VOID, (g), (n), 0)
#define TARGET_IOWINT(g, n) TARGET_IOC(TARGET_IOC_VOID, (g), (n), sizeof(int))
#define TARGET_IOR(g, n, t) TARGET_IOC(TARGET_IOC_OUT, (g), (n), sizeof(t))
#define TARGET_IOW(g, n, t) TARGET_IOC(TARGET_IOC_IN, (g), (n), sizeof(t))
/* this should be _IORW, but stdio got there first */
#define TARGET_IOWR(g, n, t) TARGET_IOC(TARGET_IOC_INOUT, (g), (n), sizeof(t))
#endif /* BSD_USER_FREEBSD_OS_IOCTL_IOCCOM_H */