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4d672e7ac7
linux_dsm_epyc7002/arch/mips/kernel/scall64-64.S
Davide Libenzi 4d672e7ac7 timerfd: new timerfd API 
This is the new timerfd API as it is implemented by the following patch:

int timerfd_create(int clockid, int flags);
int timerfd_settime(int ufd, int flags,
		    const struct itimerspec *utmr,
		    struct itimerspec *otmr);
int timerfd_gettime(int ufd, struct itimerspec *otmr);

The timerfd_create() API creates an un-programmed timerfd fd.  The "clockid"
parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME.

The timerfd_settime() API give new settings by the timerfd fd, by optionally
retrieving the previous expiration time (in case the "otmr" parameter is not
NULL).

The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit
is set in the "flags" parameter.  Otherwise it's a relative time.

The timerfd_gettime() API returns the next expiration time of the timer, or
{0, 0} if the timerfd has not been set yet.

Like the previous timerfd API implementation, read(2) and poll(2) are
supported (with the same interface).  Here's a simple test program I used to
exercise the new timerfd APIs:

http://www.xmailserver.org/timerfd-test2.c

[akpm@linux-foundation.org: coding-style cleanups]
[akpm@linux-foundation.org: fix ia64 build]
[akpm@linux-foundation.org: fix m68k build]
[akpm@linux-foundation.org: fix mips build]
[akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds]
[heiko.carstens@de.ibm.com: fix s390]
[akpm@linux-foundation.org: fix powerpc build]
[akpm@linux-foundation.org: fix sparc64 more]
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:07 -08:00

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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
*/
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/asm-offsets.h>
#include <asm/sysmips.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>
#include <asm/war.h>
#ifndef CONFIG_BINFMT_ELF32
/* Neither O32 nor N32, so define handle_sys here */
#define handle_sys64 handle_sys
#endif
.align 5
NESTED(handle_sys64, PT_SIZE, sp)
#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
/*
* When 32-bit compatibility is configured scall_o32.S
* already did this.
*/
.set noat
SAVE_SOME
TRACE_IRQS_ON_RELOAD
STI
.set at
#endif
dsubu t0, v0, __NR_64_Linux # check syscall number
sltiu t0, t0, __NR_64_Linux_syscalls + 1
#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
ld t1, PT_EPC(sp) # skip syscall on return
daddiu t1, 4 # skip to next instruction
sd t1, PT_EPC(sp)
#endif
beqz t0, illegal_syscall
dsll t0, v0, 3 # offset into table
ld t2, (sys_call_table - (__NR_64_Linux * 8))(t0)
# syscall routine
sd a3, PT_R26(sp) # save a3 for syscall restarting
li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
and t0, t1, t0
bnez t0, syscall_trace_entry
jalr t2 # Do The Real Thing (TM)
li t0, -EMAXERRNO - 1 # error?
sltu t0, t0, v0
sd t0, PT_R7(sp) # set error flag
beqz t0, 1f
dnegu v0 # error
sd v0, PT_R0(sp) # set flag for syscall
# restarting
1: sd v0, PT_R2(sp) # result
n64_syscall_exit:
local_irq_disable # make sure need_resched and
# signals dont change between
# sampling and return
LONG_L a2, TI_FLAGS($28) # current->work
li t0, _TIF_ALLWORK_MASK
and t0, a2, t0
bnez t0, n64_syscall_exit_work
j restore_partial
n64_syscall_exit_work:
j syscall_exit_work_partial
/* ------------------------------------------------------------------------ */
syscall_trace_entry:
SAVE_STATIC
move s0, t2
move a0, sp
li a1, 0
jal do_syscall_trace
move t0, s0
RESTORE_STATIC
ld a0, PT_R4(sp) # Restore argument registers
ld a1, PT_R5(sp)
ld a2, PT_R6(sp)
ld a3, PT_R7(sp)
ld a4, PT_R8(sp)
ld a5, PT_R9(sp)
jalr t0
li t0, -EMAXERRNO - 1 # error?
sltu t0, t0, v0
sd t0, PT_R7(sp) # set error flag
beqz t0, 1f
dnegu v0 # error
sd v0, PT_R0(sp) # set flag for syscall restarting
1: sd v0, PT_R2(sp) # result
j syscall_exit
illegal_syscall:
/* This also isn't a 64-bit syscall, throw an error. */
li v0, -ENOSYS # error
sd v0, PT_R2(sp)
li t0, 1 # set error flag
sd t0, PT_R7(sp)
j n64_syscall_exit
END(handle_sys64)
LEAF(mips_atomic_set)
andi v0, a1, 3 # must be word aligned
bnez v0, bad_alignment
LONG_L v1, TI_ADDR_LIMIT($28) # in legal address range?
LONG_ADDIU a0, a1, 4
or a0, a0, a1
and a0, a0, v1
bltz a0, bad_address
#ifdef CONFIG_CPU_HAS_LLSC
/* Ok, this is the ll/sc case. World is sane :-) */
1: ll v0, (a1)
move a0, a2
2: sc a0, (a1)
#if R10000_LLSC_WAR
beqzl a0, 1b
#else
beqz a0, 1b
#endif
.section __ex_table,"a"
PTR 1b, bad_stack
PTR 2b, bad_stack
.previous
#else
sw a1, 16(sp)
sw a2, 20(sp)
move a0, sp
move a2, a1
li a1, 1
jal do_page_fault
lw a1, 16(sp)
lw a2, 20(sp)
/*
* At this point the page should be readable and writable unless
* there was no more memory available.
*/
1: lw v0, (a1)
2: sw a2, (a1)
.section __ex_table,"a"
PTR 1b, no_mem
PTR 2b, no_mem
.previous
#endif
sd zero, PT_R7(sp) # success
sd v0, PT_R2(sp) # result
j n64_syscall_exit # continue like a normal syscall
no_mem: li v0, -ENOMEM
jr ra
bad_address:
li v0, -EFAULT
jr ra
bad_alignment:
li v0, -EINVAL
jr ra
END(mips_atomic_set)
LEAF(sys_sysmips)
beq a0, MIPS_ATOMIC_SET, mips_atomic_set
j _sys_sysmips
END(sys_sysmips)
.align 3
sys_call_table:
PTR sys_read /* 5000 */
PTR sys_write
PTR sys_open
PTR sys_close
PTR sys_newstat
PTR sys_newfstat /* 5005 */
PTR sys_newlstat
PTR sys_poll
PTR sys_lseek
PTR old_mmap
PTR sys_mprotect /* 5010 */
PTR sys_munmap
PTR sys_brk
PTR sys_rt_sigaction
PTR sys_rt_sigprocmask
PTR sys_ioctl /* 5015 */
PTR sys_pread64
PTR sys_pwrite64
PTR sys_readv
PTR sys_writev
PTR sys_access /* 5020 */
PTR sys_pipe
PTR sys_select
PTR sys_sched_yield
PTR sys_mremap
PTR sys_msync /* 5025 */
PTR sys_mincore
PTR sys_madvise
PTR sys_shmget
PTR sys_shmat
PTR sys_shmctl /* 5030 */
PTR sys_dup
PTR sys_dup2
PTR sys_pause
PTR sys_nanosleep
PTR sys_getitimer /* 5035 */
PTR sys_setitimer
PTR sys_alarm
PTR sys_getpid
PTR sys_sendfile64
PTR sys_socket /* 5040 */
PTR sys_connect
PTR sys_accept
PTR sys_sendto
PTR sys_recvfrom
PTR sys_sendmsg /* 5045 */
PTR sys_recvmsg
PTR sys_shutdown
PTR sys_bind
PTR sys_listen
PTR sys_getsockname /* 5050 */
PTR sys_getpeername
PTR sys_socketpair
PTR sys_setsockopt
PTR sys_getsockopt
PTR sys_clone /* 5055 */
PTR sys_fork
PTR sys_execve
PTR sys_exit
PTR sys_wait4
PTR sys_kill /* 5060 */
PTR sys_newuname
PTR sys_semget
PTR sys_semop
PTR sys_semctl
PTR sys_shmdt /* 5065 */
PTR sys_msgget
PTR sys_msgsnd
PTR sys_msgrcv
PTR sys_msgctl
PTR sys_fcntl /* 5070 */
PTR sys_flock
PTR sys_fsync
PTR sys_fdatasync
PTR sys_truncate
PTR sys_ftruncate /* 5075 */
PTR sys_getdents
PTR sys_getcwd
PTR sys_chdir
PTR sys_fchdir
PTR sys_rename /* 5080 */
PTR sys_mkdir
PTR sys_rmdir
PTR sys_creat
PTR sys_link
PTR sys_unlink /* 5085 */
PTR sys_symlink
PTR sys_readlink
PTR sys_chmod
PTR sys_fchmod
PTR sys_chown /* 5090 */
PTR sys_fchown
PTR sys_lchown
PTR sys_umask
PTR sys_gettimeofday
PTR sys_getrlimit /* 5095 */
PTR sys_getrusage
PTR sys_sysinfo
PTR sys_times
PTR sys_ptrace
PTR sys_getuid /* 5100 */
PTR sys_syslog
PTR sys_getgid
PTR sys_setuid
PTR sys_setgid
PTR sys_geteuid /* 5105 */
PTR sys_getegid
PTR sys_setpgid
PTR sys_getppid
PTR sys_getpgrp
PTR sys_setsid /* 5110 */
PTR sys_setreuid
PTR sys_setregid
PTR sys_getgroups
PTR sys_setgroups
PTR sys_setresuid /* 5115 */
PTR sys_getresuid
PTR sys_setresgid
PTR sys_getresgid
PTR sys_getpgid
PTR sys_setfsuid /* 5120 */
PTR sys_setfsgid
PTR sys_getsid
PTR sys_capget
PTR sys_capset
PTR sys_rt_sigpending /* 5125 */
PTR sys_rt_sigtimedwait
PTR sys_rt_sigqueueinfo
PTR sys_rt_sigsuspend
PTR sys_sigaltstack
PTR sys_utime /* 5130 */
PTR sys_mknod
PTR sys_personality
PTR sys_ustat
PTR sys_statfs
PTR sys_fstatfs /* 5135 */
PTR sys_sysfs
PTR sys_getpriority
PTR sys_setpriority
PTR sys_sched_setparam
PTR sys_sched_getparam /* 5140 */
PTR sys_sched_setscheduler
PTR sys_sched_getscheduler
PTR sys_sched_get_priority_max
PTR sys_sched_get_priority_min
PTR sys_sched_rr_get_interval /* 5145 */
PTR sys_mlock
PTR sys_munlock
PTR sys_mlockall
PTR sys_munlockall
PTR sys_vhangup /* 5150 */
PTR sys_pivot_root
PTR sys_sysctl
PTR sys_prctl
PTR sys_adjtimex
PTR sys_setrlimit /* 5155 */
PTR sys_chroot
PTR sys_sync
PTR sys_acct
PTR sys_settimeofday
PTR sys_mount /* 5160 */
PTR sys_umount
PTR sys_swapon
PTR sys_swapoff
PTR sys_reboot
PTR sys_sethostname /* 5165 */
PTR sys_setdomainname
PTR sys_ni_syscall /* was create_module */
PTR sys_init_module
PTR sys_delete_module
PTR sys_ni_syscall /* 5170, was get_kernel_syms */
PTR sys_ni_syscall /* was query_module */
PTR sys_quotactl
PTR sys_nfsservctl
PTR sys_ni_syscall /* res. for getpmsg */
PTR sys_ni_syscall /* 5175 for putpmsg */
PTR sys_ni_syscall /* res. for afs_syscall */
PTR sys_ni_syscall /* res. for security */
PTR sys_gettid
PTR sys_readahead
PTR sys_setxattr /* 5180 */
PTR sys_lsetxattr
PTR sys_fsetxattr
PTR sys_getxattr
PTR sys_lgetxattr
PTR sys_fgetxattr /* 5185 */
PTR sys_listxattr
PTR sys_llistxattr
PTR sys_flistxattr
PTR sys_removexattr
PTR sys_lremovexattr /* 5190 */
PTR sys_fremovexattr
PTR sys_tkill
PTR sys_ni_syscall
PTR sys_futex
PTR sys_sched_setaffinity /* 5195 */
PTR sys_sched_getaffinity
PTR sys_cacheflush
PTR sys_cachectl
PTR sys_sysmips
PTR sys_io_setup /* 5200 */
PTR sys_io_destroy
PTR sys_io_getevents
PTR sys_io_submit
PTR sys_io_cancel
PTR sys_exit_group /* 5205 */
PTR sys_lookup_dcookie
PTR sys_epoll_create
PTR sys_epoll_ctl
PTR sys_epoll_wait
PTR sys_remap_file_pages /* 5210 */
PTR sys_rt_sigreturn
PTR sys_set_tid_address
PTR sys_restart_syscall
PTR sys_semtimedop
PTR sys_fadvise64_64 /* 5215 */
PTR sys_timer_create
PTR sys_timer_settime
PTR sys_timer_gettime
PTR sys_timer_getoverrun
PTR sys_timer_delete /* 5220 */
PTR sys_clock_settime
PTR sys_clock_gettime
PTR sys_clock_getres
PTR sys_clock_nanosleep
PTR sys_tgkill /* 5225 */
PTR sys_utimes
PTR sys_mbind
PTR sys_ni_syscall /* sys_get_mempolicy */
PTR sys_ni_syscall /* sys_set_mempolicy */
PTR sys_mq_open /* 5230 */
PTR sys_mq_unlink
PTR sys_mq_timedsend
PTR sys_mq_timedreceive
PTR sys_mq_notify
PTR sys_mq_getsetattr /* 5235 */
PTR sys_ni_syscall /* sys_vserver */
PTR sys_waitid
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key
PTR sys_request_key /* 5240 */
PTR sys_keyctl
PTR sys_set_thread_area
PTR sys_inotify_init
PTR sys_inotify_add_watch
PTR sys_inotify_rm_watch /* 5245 */
PTR sys_migrate_pages
PTR sys_openat
PTR sys_mkdirat
PTR sys_mknodat
PTR sys_fchownat /* 5250 */
PTR sys_futimesat
PTR sys_newfstatat
PTR sys_unlinkat
PTR sys_renameat
PTR sys_linkat /* 5255 */
PTR sys_symlinkat
PTR sys_readlinkat
PTR sys_fchmodat
PTR sys_faccessat
PTR sys_pselect6 /* 5260 */
PTR sys_ppoll
PTR sys_unshare
PTR sys_splice
PTR sys_sync_file_range
PTR sys_tee /* 5265 */
PTR sys_vmsplice
PTR sys_move_pages
PTR sys_set_robust_list
PTR sys_get_robust_list
PTR sys_kexec_load /* 5270 */
PTR sys_getcpu
PTR sys_epoll_pwait
PTR sys_ioprio_set
PTR sys_ioprio_get
PTR sys_utimensat /* 5275 */
PTR sys_signalfd
PTR sys_ni_syscall
PTR sys_eventfd
PTR sys_fallocate
.size sys_call_table,.-sys_call_table
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