f8b9b299a2
On Linux the valid range of priorities for the SCHED_FIFO and SCHED_RR scheduling policies is [1,99]. For SCHED_OTHER the single valid priority is 0. On FreeBSD it is [0,31] for all policies. Programs are supposed to query the valid range using sched_get_priority_(min|max), but of course some programs assume the Linux values are valid. This commit adds a tunable compat.linux.map_sched_prio. When enabled sched_get_priority_(min|max) return the Linux values and sched_setscheduler and sched_(get|set)param translate between FreeBSD and Linux values. Because there are more Linux levels than FreeBSD levels, multiple Linux levels map to a single FreeBSD level, which means pre-emption might not happen as it does on Linux, so the tunable allows to disable this behaviour. It is enabled by default because I think it is unlikely that anyone runs real-time software under Linux emulation on FreeBSD that critically relies on correct pre-emption. This fixes FMOD, a commercial sound library used by several games. PR: 240043 Tested by: Alex S <iwtcex@gmail.com> Reviewed by: dchagin MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D23790
166 lines
5.3 KiB
C
166 lines
5.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2006 Roman Divacky
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _LINUX_MISC_H_
|
|
#define _LINUX_MISC_H_
|
|
|
|
#include <sys/sysctl.h>
|
|
|
|
/* bits per mask */
|
|
#define LINUX_NFDBITS sizeof(l_fd_mask) * 8
|
|
|
|
/*
|
|
* Miscellaneous
|
|
*/
|
|
#define LINUX_NAME_MAX 255
|
|
#define LINUX_MAX_UTSNAME 65
|
|
|
|
#define LINUX_CTL_MAXNAME 10
|
|
|
|
/* defines for prctl */
|
|
#define LINUX_PR_SET_PDEATHSIG 1 /* Second arg is a signal. */
|
|
#define LINUX_PR_GET_PDEATHSIG 2 /*
|
|
* Second arg is a ptr to return the
|
|
* signal.
|
|
*/
|
|
#define LINUX_PR_GET_KEEPCAPS 7 /* Get drop capabilities on setuid */
|
|
#define LINUX_PR_SET_KEEPCAPS 8 /* Set drop capabilities on setuid */
|
|
#define LINUX_PR_SET_NAME 15 /* Set process name. */
|
|
#define LINUX_PR_GET_NAME 16 /* Get process name. */
|
|
|
|
#define LINUX_MAX_COMM_LEN 16 /* Maximum length of the process name. */
|
|
|
|
#define LINUX_MREMAP_MAYMOVE 1
|
|
#define LINUX_MREMAP_FIXED 2
|
|
|
|
#define LINUX_PATH_MAX 4096
|
|
|
|
extern const char *linux_kplatform;
|
|
|
|
/*
|
|
* Non-standard aux entry types used in Linux ELF binaries.
|
|
*/
|
|
|
|
#define LINUX_AT_PLATFORM 15 /* String identifying CPU */
|
|
#define LINUX_AT_HWCAP 16 /* CPU capabilities */
|
|
#define LINUX_AT_CLKTCK 17 /* frequency at which times() increments */
|
|
#define LINUX_AT_SECURE 23 /* secure mode boolean */
|
|
#define LINUX_AT_BASE_PLATFORM 24 /* string identifying real platform, may
|
|
* differ from AT_PLATFORM.
|
|
*/
|
|
#define LINUX_AT_RANDOM 25 /* address of random bytes */
|
|
#define LINUX_AT_EXECFN 31 /* filename of program */
|
|
#define LINUX_AT_SYSINFO 32 /* vsyscall */
|
|
#define LINUX_AT_SYSINFO_EHDR 33 /* vdso header */
|
|
|
|
#define LINUX_AT_RANDOM_LEN 16 /* size of random bytes */
|
|
|
|
/* Linux sets the i387 to extended precision. */
|
|
#if defined(__i386__) || defined(__amd64__)
|
|
#define __LINUX_NPXCW__ 0x37f
|
|
#endif
|
|
|
|
#define LINUX_CLONE_VM 0x00000100
|
|
#define LINUX_CLONE_FS 0x00000200
|
|
#define LINUX_CLONE_FILES 0x00000400
|
|
#define LINUX_CLONE_SIGHAND 0x00000800
|
|
#define LINUX_CLONE_PID 0x00001000 /* No longer exist in Linux */
|
|
#define LINUX_CLONE_VFORK 0x00004000
|
|
#define LINUX_CLONE_PARENT 0x00008000
|
|
#define LINUX_CLONE_THREAD 0x00010000
|
|
#define LINUX_CLONE_SETTLS 0x00080000
|
|
#define LINUX_CLONE_PARENT_SETTID 0x00100000
|
|
#define LINUX_CLONE_CHILD_CLEARTID 0x00200000
|
|
#define LINUX_CLONE_CHILD_SETTID 0x01000000
|
|
|
|
/* Scheduling policies */
|
|
#define LINUX_SCHED_OTHER 0
|
|
#define LINUX_SCHED_FIFO 1
|
|
#define LINUX_SCHED_RR 2
|
|
|
|
#define LINUX_MAX_RT_PRIO 100
|
|
|
|
struct l_new_utsname {
|
|
char sysname[LINUX_MAX_UTSNAME];
|
|
char nodename[LINUX_MAX_UTSNAME];
|
|
char release[LINUX_MAX_UTSNAME];
|
|
char version[LINUX_MAX_UTSNAME];
|
|
char machine[LINUX_MAX_UTSNAME];
|
|
char domainname[LINUX_MAX_UTSNAME];
|
|
};
|
|
|
|
#define LINUX_UTIME_NOW 0x3FFFFFFF
|
|
#define LINUX_UTIME_OMIT 0x3FFFFFFE
|
|
|
|
extern int stclohz;
|
|
|
|
#define LINUX_WNOHANG 0x00000001
|
|
#define LINUX_WUNTRACED 0x00000002
|
|
#define LINUX_WSTOPPED LINUX_WUNTRACED
|
|
#define LINUX_WEXITED 0x00000004
|
|
#define LINUX_WCONTINUED 0x00000008
|
|
#define LINUX_WNOWAIT 0x01000000
|
|
|
|
|
|
#define __WNOTHREAD 0x20000000
|
|
#define __WALL 0x40000000
|
|
#define __WCLONE 0x80000000
|
|
|
|
/* Linux waitid idtype */
|
|
#define LINUX_P_ALL 0
|
|
#define LINUX_P_PID 1
|
|
#define LINUX_P_PGID 2
|
|
|
|
#define LINUX_RLIMIT_LOCKS RLIM_NLIMITS + 1
|
|
#define LINUX_RLIMIT_SIGPENDING RLIM_NLIMITS + 2
|
|
#define LINUX_RLIMIT_MSGQUEUE RLIM_NLIMITS + 3
|
|
#define LINUX_RLIMIT_NICE RLIM_NLIMITS + 4
|
|
#define LINUX_RLIMIT_RTPRIO RLIM_NLIMITS + 5
|
|
#define LINUX_RLIMIT_RTTIME RLIM_NLIMITS + 6
|
|
|
|
#define LINUX_RLIM_INFINITY (~0UL)
|
|
|
|
/* Linux getrandom flags */
|
|
#define LINUX_GRND_NONBLOCK 0x0001
|
|
#define LINUX_GRND_RANDOM 0x0002
|
|
|
|
/* Linux syslog flags */
|
|
#define LINUX_SYSLOG_ACTION_READ_ALL 3
|
|
|
|
#if defined(__amd64__) && !defined(COMPAT_LINUX32)
|
|
int linux_ptrace_status(struct thread *td, int pid, int status);
|
|
#endif
|
|
void linux_to_bsd_waitopts(int options, int *bsdopts);
|
|
int linux_set_upcall_kse(struct thread *td, register_t stack);
|
|
int linux_set_cloned_tls(struct thread *td, void *desc);
|
|
struct thread *linux_tdfind(struct thread *, lwpid_t, pid_t);
|
|
|
|
#endif /* _LINUX_MISC_H_ */
|