[mirror_ubuntu-bionic-kernel.git] / arch / mips / kernel / scall32-o32.S

/*
 * 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) 1995-99, 2000- 02, 06 Ralf Baechle <ralf@linux-mips.org>
 * Copyright (C) 2001 MIPS Technologies, Inc.
 * Copyright (C) 2004 Thiemo Seufer
 */
#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/isadep.h>
#include <asm/sysmips.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>
#include <asm/war.h>
#include <asm/asm-offsets.h>

/* Highest syscall used of any syscall flavour */
#define MAX_SYSCALL_NO	__NR_O32_Linux + __NR_O32_Linux_syscalls

	.align	5
NESTED(handle_sys, PT_SIZE, sp)
	.set	noat
	SAVE_SOME
	TRACE_IRQS_ON_RELOAD
	STI
	.set	at

	lw	t1, PT_EPC(sp)		# skip syscall on return

	subu	v0, v0, __NR_O32_Linux	# check syscall number
	sltiu	t0, v0, __NR_O32_Linux_syscalls + 1
	addiu	t1, 4			# skip to next instruction
	sw	t1, PT_EPC(sp)
	beqz	t0, illegal_syscall

	sll	t0, v0, 2
	la	t1, sys_call_table
	addu	t1, t0
	lw	t2, (t1)		# syscall routine
	beqz	t2, illegal_syscall

	sw	a3, PT_R26(sp)		# save a3 for syscall restarting

	/*
	 * More than four arguments.  Try to deal with it by copying the
	 * stack arguments from the user stack to the kernel stack.
	 * This Sucks (TM).
	 */
	lw	t0, PT_R29(sp)		# get old user stack pointer

	/*
	 * We intentionally keep the kernel stack a little below the top of
	 * userspace so we don't have to do a slower byte accurate check here.
	 */
	lw	t5, TI_ADDR_LIMIT($28)
	addu	t4, t0, 32
	and	t5, t4
	bltz	t5, bad_stack		# -> sp is bad

	/*
	 * Ok, copy the args from the luser stack to the kernel stack.
	 * t3 is the precomputed number of instruction bytes needed to
	 * load or store arguments 6-8.
	 */

	.set    push
	.set    noreorder
	.set	nomacro

1:	lw	t5, 16(t0)		# argument #5 from usp
4:	lw	t6, 20(t0)		# argument #6 from usp
3:	lw	t7, 24(t0)		# argument #7 from usp
2:	lw	t8, 28(t0)		# argument #8 from usp

	sw	t5, 16(sp)		# argument #5 to ksp
	sw	t6, 20(sp)		# argument #6 to ksp
	sw	t7, 24(sp)		# argument #7 to ksp
	sw	t8, 28(sp)		# argument #8 to ksp
	.set	pop

	.section __ex_table,"a"
	PTR	1b,bad_stack
	PTR	2b,bad_stack
	PTR	3b,bad_stack
	PTR	4b,bad_stack
	.previous

	lw	t0, TI_FLAGS($28)	# syscall tracing enabled?
	li	t1, _TIF_WORK_SYSCALL_ENTRY
	and	t0, t1
	bnez	t0, syscall_trace_entry # -> yes

	jalr	t2			# Do The Real Thing (TM)

	li	t0, -EMAXERRNO - 1	# error?
	sltu	t0, t0, v0
	sw	t0, PT_R7(sp)		# set error flag
	beqz	t0, 1f

	lw	t1, PT_R2(sp)		# syscall number
	negu	v0			# error
	sw	t1, PT_R0(sp)		# save it for syscall restarting
1:	sw	v0, PT_R2(sp)		# result

o32_syscall_exit:
	j	syscall_exit_partial

/* ------------------------------------------------------------------------ */

syscall_trace_entry:
	SAVE_STATIC
	move	s0, t2
	move	a0, sp
	jal	syscall_trace_enter

	bltz	v0, 2f			# seccomp failed? Skip syscall

	move	t0, s0
	RESTORE_STATIC
	lw	a0, PT_R4(sp)		# Restore argument registers
	lw	a1, PT_R5(sp)
	lw	a2, PT_R6(sp)
	lw	a3, PT_R7(sp)
	jalr	t0

	li	t0, -EMAXERRNO - 1	# error?
	sltu	t0, t0, v0
	sw	t0, PT_R7(sp)		# set error flag
	beqz	t0, 1f

	lw	t1, PT_R2(sp)		# syscall number
	negu	v0			# error
	sw	t1, PT_R0(sp)		# save it for syscall restarting
1:	sw	v0, PT_R2(sp)		# result

2:	j	syscall_exit

/* ------------------------------------------------------------------------ */

	/*
	 * The stackpointer for a call with more than 4 arguments is bad.
	 * We probably should handle this case a bit more drastic.
	 */
bad_stack:
	li	v0, EFAULT
	sw	v0, PT_R2(sp)
	li	t0, 1				# set error flag
	sw	t0, PT_R7(sp)
	j	o32_syscall_exit

	/*
	 * The system call does not exist in this kernel
	 */
illegal_syscall:
	li	v0, ENOSYS			# error
	sw	v0, PT_R2(sp)
	li	t0, 1				# set error flag
	sw	t0, PT_R7(sp)
	j	o32_syscall_exit
	END(handle_sys)

	LEAF(sys_syscall)
	subu	t0, a0, __NR_O32_Linux	# check syscall number
	sltiu	v0, t0, __NR_O32_Linux_syscalls + 1
	beqz	t0, einval		# do not recurse
	sll	t1, t0, 2
	beqz	v0, einval
	lw	t2, sys_call_table(t1)		# syscall routine

	/* Some syscalls like execve get their arguments from struct pt_regs
	   and claim zero arguments in the syscall table. Thus we have to
	   assume the worst case and shuffle around all potential arguments.
	   If you want performance, don't use indirect syscalls. */

	move	a0, a1				# shift argument registers
	move	a1, a2
	move	a2, a3
	lw	a3, 16(sp)
	lw	t4, 20(sp)
	lw	t5, 24(sp)
	lw	t6, 28(sp)
	sw	t4, 16(sp)
	sw	t5, 20(sp)
	sw	t6, 24(sp)
	sw	a0, PT_R4(sp)			# .. and push back a0 - a3, some
	sw	a1, PT_R5(sp)			# syscalls expect them there
	sw	a2, PT_R6(sp)
	sw	a3, PT_R7(sp)
	sw	a3, PT_R26(sp)			# update a3 for syscall restarting
	jr	t2
	/* Unreached */

einval: li	v0, -ENOSYS
	jr	ra
	END(sys_syscall)

	.align	2
	.type	sys_call_table, @object
EXPORT(sys_call_table)
	PTR	sys_syscall			/* 4000 */
	PTR	sys_exit
	PTR	__sys_fork
	PTR	sys_read
	PTR	sys_write
	PTR	sys_open			/* 4005 */
	PTR	sys_close
	PTR	sys_waitpid
	PTR	sys_creat
	PTR	sys_link
	PTR	sys_unlink			/* 4010 */
	PTR	sys_execve
	PTR	sys_chdir
	PTR	sys_time
	PTR	sys_mknod
	PTR	sys_chmod			/* 4015 */
	PTR	sys_lchown
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall			/* was sys_stat */
	PTR	sys_lseek
	PTR	sys_getpid			/* 4020 */
	PTR	sys_mount
	PTR	sys_oldumount
	PTR	sys_setuid
	PTR	sys_getuid
	PTR	sys_stime			/* 4025 */
	PTR	sys_ptrace
	PTR	sys_alarm
	PTR	sys_ni_syscall			/* was sys_fstat */
	PTR	sys_pause
	PTR	sys_utime			/* 4030 */
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall
	PTR	sys_access
	PTR	sys_nice
	PTR	sys_ni_syscall			/* 4035 */
	PTR	sys_sync
	PTR	sys_kill
	PTR	sys_rename
	PTR	sys_mkdir
	PTR	sys_rmdir			/* 4040 */
	PTR	sys_dup
	PTR	sysm_pipe
	PTR	sys_times
	PTR	sys_ni_syscall
	PTR	sys_brk				/* 4045 */
	PTR	sys_setgid
	PTR	sys_getgid
	PTR	sys_ni_syscall			/* was signal(2) */
	PTR	sys_geteuid
	PTR	sys_getegid			/* 4050 */
	PTR	sys_acct
	PTR	sys_umount
	PTR	sys_ni_syscall
	PTR	sys_ioctl
	PTR	sys_fcntl			/* 4055 */
	PTR	sys_ni_syscall
	PTR	sys_setpgid
	PTR	sys_ni_syscall
	PTR	sys_olduname
	PTR	sys_umask			/* 4060 */
	PTR	sys_chroot
	PTR	sys_ustat
	PTR	sys_dup2
	PTR	sys_getppid
	PTR	sys_getpgrp			/* 4065 */
	PTR	sys_setsid
	PTR	sys_sigaction
	PTR	sys_sgetmask
	PTR	sys_ssetmask
	PTR	sys_setreuid			/* 4070 */
	PTR	sys_setregid
	PTR	sys_sigsuspend
	PTR	sys_sigpending
	PTR	sys_sethostname
	PTR	sys_setrlimit			/* 4075 */
	PTR	sys_getrlimit
	PTR	sys_getrusage
	PTR	sys_gettimeofday
	PTR	sys_settimeofday
	PTR	sys_getgroups			/* 4080 */
	PTR	sys_setgroups
	PTR	sys_ni_syscall			/* old_select */
	PTR	sys_symlink
	PTR	sys_ni_syscall			/* was sys_lstat */
	PTR	sys_readlink			/* 4085 */
	PTR	sys_uselib
	PTR	sys_swapon
	PTR	sys_reboot
	PTR	sys_old_readdir
	PTR	sys_mips_mmap			/* 4090 */
	PTR	sys_munmap
	PTR	sys_truncate
	PTR	sys_ftruncate
	PTR	sys_fchmod
	PTR	sys_fchown			/* 4095 */
	PTR	sys_getpriority
	PTR	sys_setpriority
	PTR	sys_ni_syscall
	PTR	sys_statfs
	PTR	sys_fstatfs			/* 4100 */
	PTR	sys_ni_syscall			/* was ioperm(2) */
	PTR	sys_socketcall
	PTR	sys_syslog
	PTR	sys_setitimer
	PTR	sys_getitimer			/* 4105 */
	PTR	sys_newstat
	PTR	sys_newlstat
	PTR	sys_newfstat
	PTR	sys_uname
	PTR	sys_ni_syscall			/* 4110 was iopl(2) */
	PTR	sys_vhangup
	PTR	sys_ni_syscall			/* was sys_idle() */
	PTR	sys_ni_syscall			/* was sys_vm86 */
	PTR	sys_wait4
	PTR	sys_swapoff			/* 4115 */
	PTR	sys_sysinfo
	PTR	sys_ipc
	PTR	sys_fsync
	PTR	sys_sigreturn
	PTR	__sys_clone			/* 4120 */
	PTR	sys_setdomainname
	PTR	sys_newuname
	PTR	sys_ni_syscall			/* sys_modify_ldt */
	PTR	sys_adjtimex
	PTR	sys_mprotect			/* 4125 */
	PTR	sys_sigprocmask
	PTR	sys_ni_syscall			/* was create_module */
	PTR	sys_init_module
	PTR	sys_delete_module
	PTR	sys_ni_syscall			/* 4130 was get_kernel_syms */
	PTR	sys_quotactl
	PTR	sys_getpgid
	PTR	sys_fchdir
	PTR	sys_bdflush
	PTR	sys_sysfs			/* 4135 */
	PTR	sys_personality
	PTR	sys_ni_syscall			/* for afs_syscall */
	PTR	sys_setfsuid
	PTR	sys_setfsgid
	PTR	sys_llseek			/* 4140 */
	PTR	sys_getdents
	PTR	sys_select
	PTR	sys_flock
	PTR	sys_msync
	PTR	sys_readv			/* 4145 */
	PTR	sys_writev
	PTR	sys_cacheflush
	PTR	sys_cachectl
	PTR	sys_sysmips
	PTR	sys_ni_syscall			/* 4150 */
	PTR	sys_getsid
	PTR	sys_fdatasync
	PTR	sys_sysctl
	PTR	sys_mlock
	PTR	sys_munlock			/* 4155 */
	PTR	sys_mlockall
	PTR	sys_munlockall
	PTR	sys_sched_setparam
	PTR	sys_sched_getparam
	PTR	sys_sched_setscheduler		/* 4160 */
	PTR	sys_sched_getscheduler
	PTR	sys_sched_yield
	PTR	sys_sched_get_priority_max
	PTR	sys_sched_get_priority_min
	PTR	sys_sched_rr_get_interval	/* 4165 */
	PTR	sys_nanosleep
	PTR	sys_mremap
	PTR	sys_accept
	PTR	sys_bind
	PTR	sys_connect			/* 4170 */
	PTR	sys_getpeername
	PTR	sys_getsockname
	PTR	sys_getsockopt
	PTR	sys_listen
	PTR	sys_recv			/* 4175 */
	PTR	sys_recvfrom
	PTR	sys_recvmsg
	PTR	sys_send
	PTR	sys_sendmsg
	PTR	sys_sendto			/* 4180 */
	PTR	sys_setsockopt
	PTR	sys_shutdown
	PTR	sys_socket
	PTR	sys_socketpair
	PTR	sys_setresuid			/* 4185 */
	PTR	sys_getresuid
	PTR	sys_ni_syscall			/* was sys_query_module */
	PTR	sys_poll
	PTR	sys_ni_syscall			/* was nfsservctl */
	PTR	sys_setresgid			/* 4190 */
	PTR	sys_getresgid
	PTR	sys_prctl
	PTR	sys_rt_sigreturn
	PTR	sys_rt_sigaction
	PTR	sys_rt_sigprocmask		/* 4195 */
	PTR	sys_rt_sigpending
	PTR	sys_rt_sigtimedwait
	PTR	sys_rt_sigqueueinfo
	PTR	sys_rt_sigsuspend
	PTR	sys_pread64			/* 4200 */
	PTR	sys_pwrite64
	PTR	sys_chown
	PTR	sys_getcwd
	PTR	sys_capget
	PTR	sys_capset			/* 4205 */
	PTR	sys_sigaltstack
	PTR	sys_sendfile
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall
	PTR	sys_mips_mmap2			/* 4210 */
	PTR	sys_truncate64
	PTR	sys_ftruncate64
	PTR	sys_stat64
	PTR	sys_lstat64
	PTR	sys_fstat64			/* 4215 */
	PTR	sys_pivot_root
	PTR	sys_mincore
	PTR	sys_madvise
	PTR	sys_getdents64
	PTR	sys_fcntl64			/* 4220 */
	PTR	sys_ni_syscall
	PTR	sys_gettid
	PTR	sys_readahead
	PTR	sys_setxattr
	PTR	sys_lsetxattr			/* 4225 */
	PTR	sys_fsetxattr
	PTR	sys_getxattr
	PTR	sys_lgetxattr
	PTR	sys_fgetxattr
	PTR	sys_listxattr			/* 4230 */
	PTR	sys_llistxattr
	PTR	sys_flistxattr
	PTR	sys_removexattr
	PTR	sys_lremovexattr
	PTR	sys_fremovexattr		/* 4235 */
	PTR	sys_tkill
	PTR	sys_sendfile64
	PTR	sys_futex
#ifdef CONFIG_MIPS_MT_FPAFF
	/*
	 * For FPU affinity scheduling on MIPS MT processors, we need to
	 * intercept sys_sched_xxxaffinity() calls until we get a proper hook
	 * in kernel/sched/core.c.  Considered only temporary we only support
	 * these hooks for the 32-bit kernel - there is no MIPS64 MT processor
	 * atm.
	 */
	PTR	mipsmt_sys_sched_setaffinity
	PTR	mipsmt_sys_sched_getaffinity
#else
	PTR	sys_sched_setaffinity
	PTR	sys_sched_getaffinity		/* 4240 */
#endif /* CONFIG_MIPS_MT_FPAFF */
	PTR	sys_io_setup
	PTR	sys_io_destroy
	PTR	sys_io_getevents
	PTR	sys_io_submit
	PTR	sys_io_cancel			/* 4245 */
	PTR	sys_exit_group
	PTR	sys_lookup_dcookie
	PTR	sys_epoll_create
	PTR	sys_epoll_ctl
	PTR	sys_epoll_wait			/* 4250 */
	PTR	sys_remap_file_pages
	PTR	sys_set_tid_address
	PTR	sys_restart_syscall
	PTR	sys_fadvise64_64
	PTR	sys_statfs64			/* 4255 */
	PTR	sys_fstatfs64
	PTR	sys_timer_create
	PTR	sys_timer_settime
	PTR	sys_timer_gettime
	PTR	sys_timer_getoverrun		/* 4260 */
	PTR	sys_timer_delete
	PTR	sys_clock_settime
	PTR	sys_clock_gettime
	PTR	sys_clock_getres
	PTR	sys_clock_nanosleep		/* 4265 */
	PTR	sys_tgkill
	PTR	sys_utimes
	PTR	sys_mbind
	PTR	sys_ni_syscall			/* sys_get_mempolicy */
	PTR	sys_ni_syscall			/* 4270 sys_set_mempolicy */
	PTR	sys_mq_open
	PTR	sys_mq_unlink
	PTR	sys_mq_timedsend
	PTR	sys_mq_timedreceive
	PTR	sys_mq_notify			/* 4275 */
	PTR	sys_mq_getsetattr
	PTR	sys_ni_syscall			/* sys_vserver */
	PTR	sys_waitid
	PTR	sys_ni_syscall			/* available, was setaltroot */
	PTR	sys_add_key			/* 4280 */
	PTR	sys_request_key
	PTR	sys_keyctl
	PTR	sys_set_thread_area
	PTR	sys_inotify_init
	PTR	sys_inotify_add_watch		/* 4285 */
	PTR	sys_inotify_rm_watch
	PTR	sys_migrate_pages
	PTR	sys_openat
	PTR	sys_mkdirat
	PTR	sys_mknodat			/* 4290 */
	PTR	sys_fchownat
	PTR	sys_futimesat
	PTR	sys_fstatat64
	PTR	sys_unlinkat
	PTR	sys_renameat			/* 4295 */
	PTR	sys_linkat
	PTR	sys_symlinkat
	PTR	sys_readlinkat
	PTR	sys_fchmodat
	PTR	sys_faccessat			/* 4300 */
	PTR	sys_pselect6
	PTR	sys_ppoll
	PTR	sys_unshare
	PTR	sys_splice
	PTR	sys_sync_file_range		/* 4305 */
	PTR	sys_tee
	PTR	sys_vmsplice
	PTR	sys_move_pages
	PTR	sys_set_robust_list
	PTR	sys_get_robust_list		/* 4310 */
	PTR	sys_kexec_load
	PTR	sys_getcpu
	PTR	sys_epoll_pwait
	PTR	sys_ioprio_set
	PTR	sys_ioprio_get			/* 4315 */
	PTR	sys_utimensat
	PTR	sys_signalfd
	PTR	sys_ni_syscall			/* was timerfd */
	PTR	sys_eventfd
	PTR	sys_fallocate			/* 4320 */
	PTR	sys_timerfd_create
	PTR	sys_timerfd_gettime
	PTR	sys_timerfd_settime
	PTR	sys_signalfd4
	PTR	sys_eventfd2			/* 4325 */
	PTR	sys_epoll_create1
	PTR	sys_dup3
	PTR	sys_pipe2
	PTR	sys_inotify_init1
	PTR	sys_preadv			/* 4330 */
	PTR	sys_pwritev
	PTR	sys_rt_tgsigqueueinfo
	PTR	sys_perf_event_open
	PTR	sys_accept4
	PTR	sys_recvmmsg			/* 4335 */
	PTR	sys_fanotify_init
	PTR	sys_fanotify_mark
	PTR	sys_prlimit64
	PTR	sys_name_to_handle_at
	PTR	sys_open_by_handle_at		/* 4340 */
	PTR	sys_clock_adjtime
	PTR	sys_syncfs
	PTR	sys_sendmmsg
	PTR	sys_setns
	PTR	sys_process_vm_readv		/* 4345 */
	PTR	sys_process_vm_writev
	PTR	sys_kcmp
	PTR	sys_finit_module
	PTR	sys_sched_setattr
	PTR	sys_sched_getattr		/* 4350 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
192ef366	6	* Copyright (C) 1995-99, 2000- 02, 06 Ralf Baechle <ralf@linux-mips.org>
1da177e4 LT	7	* Copyright (C) 2001 MIPS Technologies, Inc.
	8	* Copyright (C) 2004 Thiemo Seufer
	9	*/
1da177e4 LT	10	#include <linux/errno.h>
	11	#include <asm/asm.h>
	12	#include <asm/asmmacro.h>
192ef366	13	#include <asm/irqflags.h>
1da177e4 LT	14	#include <asm/mipsregs.h>
	15	#include <asm/regdef.h>
	16	#include <asm/stackframe.h>
	17	#include <asm/isadep.h>
	18	#include <asm/sysmips.h>
	19	#include <asm/thread_info.h>
	20	#include <asm/unistd.h>
	21	#include <asm/war.h>
048eb582	22	#include <asm/asm-offsets.h>
1da177e4 LT	23
	24	/* Highest syscall used of any syscall flavour */
	25	#define MAX_SYSCALL_NO __NR_O32_Linux + __NR_O32_Linux_syscalls
	26
70342287	27	.align 5
1da177e4 LT	28	NESTED(handle_sys, PT_SIZE, sp)
	29	.set noat
	30	SAVE_SOME
eae6c0da	31	TRACE_IRQS_ON_RELOAD
1da177e4 LT	32	STI
	33	.set at
	34
	35	lw t1, PT_EPC(sp) # skip syscall on return
	36
1da177e4 LT	37	subu v0, v0, __NR_O32_Linux # check syscall number
1da177e4 LT	38	sltiu t0, v0, __NR_O32_Linux_syscalls + 1
1da177e4 LT	39	addiu t1, 4 # skip to next instruction
	40	sw t1, PT_EPC(sp)
	41	beqz t0, illegal_syscall
	42
46e12c07	43	sll t0, v0, 2
1da177e4 LT	44	la t1, sys_call_table
	45	addu t1, t0
	46	lw t2, (t1) # syscall routine
1da177e4 LT	47	beqz t2, illegal_syscall
	48
	49	sw a3, PT_R26(sp) # save a3 for syscall restarting
1da177e4	50
46e12c07 RB	51	/*
	52	* More than four arguments. Try to deal with it by copying the
	53	* stack arguments from the user stack to the kernel stack.
	54	* This Sucks (TM).
	55	*/
	56	lw t0, PT_R29(sp) # get old user stack pointer
	57
	58	/*
	59	* We intentionally keep the kernel stack a little below the top of
	60	* userspace so we don't have to do a slower byte accurate check here.
	61	*/
	62	lw t5, TI_ADDR_LIMIT($28)
	63	addu t4, t0, 32
	64	and t5, t4
	65	bltz t5, bad_stack # -> sp is bad
	66
	67	/*
	68	* Ok, copy the args from the luser stack to the kernel stack.
	69	* t3 is the precomputed number of instruction bytes needed to
	70	* load or store arguments 6-8.
	71	*/
	72
	73	.set push
	74	.set noreorder
	75	.set nomacro
	76
	77	1: lw t5, 16(t0) # argument #5 from usp
	78	4: lw t6, 20(t0) # argument #6 from usp
	79	3: lw t7, 24(t0) # argument #7 from usp
	80	2: lw t8, 28(t0) # argument #8 from usp
	81
	82	sw t5, 16(sp) # argument #5 to ksp
	83	sw t6, 20(sp) # argument #6 to ksp
	84	sw t7, 24(sp) # argument #7 to ksp
	85	sw t8, 28(sp) # argument #8 to ksp
	86	.set pop
	87
	88	.section __ex_table,"a"
	89	PTR 1b,bad_stack
	90	PTR 2b,bad_stack
	91	PTR 3b,bad_stack
	92	PTR 4b,bad_stack
	93	.previous
	94
1da177e4	95	lw t0, TI_FLAGS($28) # syscall tracing enabled?
e7f3b48a	96	li t1, _TIF_WORK_SYSCALL_ENTRY
1da177e4	97	and t0, t1
70342287	98	bnez t0, syscall_trace_entry # -> yes
1da177e4 LT	99
	100	jalr t2 # Do The Real Thing (TM)
	101
	102	li t0, -EMAXERRNO - 1 # error?
	103	sltu t0, t0, v0
	104	sw t0, PT_R7(sp) # set error flag
	105	beqz t0, 1f
	106
8f5a00eb	107	lw t1, PT_R2(sp) # syscall number
1da177e4	108	negu v0 # error
8f5a00eb	109	sw t1, PT_R0(sp) # save it for syscall restarting
1da177e4 LT	110	1: sw v0, PT_R2(sp) # result
	111
	112	o32_syscall_exit:
02f884ed	113	j syscall_exit_partial
1da177e4 LT	114
	115	/* ------------------------------------------------------------------------ */
	116
	117	syscall_trace_entry:
	118	SAVE_STATIC
	119	move s0, t2
	120	move a0, sp
8b659a39	121	jal syscall_trace_enter
1da177e4	122
9d37c405 MC	123	bltz v0, 2f # seccomp failed? Skip syscall
9d37c405 MC	124
04a7052c RB	125	move t0, s0
04a7052c RB	126	RESTORE_STATIC
1da177e4 LT	127	lw a0, PT_R4(sp) # Restore argument registers
	128	lw a1, PT_R5(sp)
	129	lw a2, PT_R6(sp)
	130	lw a3, PT_R7(sp)
04a7052c	131	jalr t0
1da177e4 LT	132
	133	li t0, -EMAXERRNO - 1 # error?
	134	sltu t0, t0, v0
	135	sw t0, PT_R7(sp) # set error flag
	136	beqz t0, 1f
	137
8f5a00eb	138	lw t1, PT_R2(sp) # syscall number
1da177e4	139	negu v0 # error
8f5a00eb	140	sw t1, PT_R0(sp) # save it for syscall restarting
1da177e4 LT	141	1: sw v0, PT_R2(sp) # result
1da177e4 LT	142
9d37c405	143	2: j syscall_exit
1da177e4 LT	144
	145	/* ------------------------------------------------------------------------ */
	146
1da177e4 LT	147	/*
	148	* The stackpointer for a call with more than 4 arguments is bad.
	149	* We probably should handle this case a bit more drastic.
	150	*/
	151	bad_stack:
5b89c004	152	li v0, EFAULT
1da177e4 LT	153	sw v0, PT_R2(sp)
	154	li t0, 1 # set error flag
	155	sw t0, PT_R7(sp)
	156	j o32_syscall_exit
	157
	158	/*
	159	* The system call does not exist in this kernel
	160	*/
	161	illegal_syscall:
bda8229b	162	li v0, ENOSYS # error
1da177e4 LT	163	sw v0, PT_R2(sp)
	164	li t0, 1 # set error flag
	165	sw t0, PT_R7(sp)
	166	j o32_syscall_exit
	167	END(handle_sys)
	168
1da177e4	169	LEAF(sys_syscall)
1da177e4 LT	170	subu t0, a0, __NR_O32_Linux # check syscall number
1da177e4 LT	171	sltiu v0, t0, __NR_O32_Linux_syscalls + 1
e807f957	172	beqz t0, einval # do not recurse
46e12c07	173	sll t1, t0, 2
1da177e4	174	beqz v0, einval
1da177e4 LT	175	lw t2, sys_call_table(t1) # syscall routine
1da177e4 LT	176
1da177e4 LT	177	/* Some syscalls like execve get their arguments from struct pt_regs
	178	and claim zero arguments in the syscall table. Thus we have to
	179	assume the worst case and shuffle around all potential arguments.
	180	If you want performance, don't use indirect syscalls. */
	181
	182	move a0, a1 # shift argument registers
	183	move a1, a2
	184	move a2, a3
	185	lw a3, 16(sp)
	186	lw t4, 20(sp)
	187	lw t5, 24(sp)
	188	lw t6, 28(sp)
	189	sw t4, 16(sp)
	190	sw t5, 20(sp)
	191	sw t6, 24(sp)
	192	sw a0, PT_R4(sp) # .. and push back a0 - a3, some
	193	sw a1, PT_R5(sp) # syscalls expect them there
	194	sw a2, PT_R6(sp)
	195	sw a3, PT_R7(sp)
	196	sw a3, PT_R26(sp) # update a3 for syscall restarting
	197	jr t2
	198	/* Unreached */
	199
70342287	200	einval: li v0, -ENOSYS
1da177e4 LT	201	jr ra
	202	END(sys_syscall)
	203
46e12c07 RB	204	.align 2
	205	.type sys_call_table, @object
	206	EXPORT(sys_call_table)
	207	PTR sys_syscall /* 4000 */
	208	PTR sys_exit
	209	PTR __sys_fork
	210	PTR sys_read
	211	PTR sys_write
	212	PTR sys_open /* 4005 */
	213	PTR sys_close
	214	PTR sys_waitpid
	215	PTR sys_creat
	216	PTR sys_link
	217	PTR sys_unlink /* 4010 */
	218	PTR sys_execve
	219	PTR sys_chdir
	220	PTR sys_time
	221	PTR sys_mknod
	222	PTR sys_chmod /* 4015 */
	223	PTR sys_lchown
	224	PTR sys_ni_syscall
	225	PTR sys_ni_syscall /* was sys_stat */
	226	PTR sys_lseek
	227	PTR sys_getpid /* 4020 */
	228	PTR sys_mount
	229	PTR sys_oldumount
	230	PTR sys_setuid
	231	PTR sys_getuid
	232	PTR sys_stime /* 4025 */
	233	PTR sys_ptrace
	234	PTR sys_alarm
	235	PTR sys_ni_syscall /* was sys_fstat */
	236	PTR sys_pause
	237	PTR sys_utime /* 4030 */
	238	PTR sys_ni_syscall
	239	PTR sys_ni_syscall
	240	PTR sys_access
	241	PTR sys_nice
	242	PTR sys_ni_syscall /* 4035 */
	243	PTR sys_sync
	244	PTR sys_kill
	245	PTR sys_rename
	246	PTR sys_mkdir
	247	PTR sys_rmdir /* 4040 */
	248	PTR sys_dup
	249	PTR sysm_pipe
	250	PTR sys_times
	251	PTR sys_ni_syscall
	252	PTR sys_brk /* 4045 */
	253	PTR sys_setgid
	254	PTR sys_getgid
	255	PTR sys_ni_syscall /* was signal(2) */
	256	PTR sys_geteuid
	257	PTR sys_getegid /* 4050 */
	258	PTR sys_acct
	259	PTR sys_umount
	260	PTR sys_ni_syscall
	261	PTR sys_ioctl
	262	PTR sys_fcntl /* 4055 */
	263	PTR sys_ni_syscall
	264	PTR sys_setpgid
	265	PTR sys_ni_syscall
	266	PTR sys_olduname
	267	PTR sys_umask /* 4060 */
268	PTR sys_chroot
269	PTR sys_ustat
270	PTR sys_dup2
271	PTR sys_getppid
272	PTR sys_getpgrp /* 4065 */
273	PTR sys_setsid
274	PTR sys_sigaction
275	PTR sys_sgetmask
276	PTR sys_ssetmask
277	PTR sys_setreuid /* 4070 */
278	PTR sys_setregid
279	PTR sys_sigsuspend
280	PTR sys_sigpending
281	PTR sys_sethostname
282	PTR sys_setrlimit /* 4075 */
283	PTR sys_getrlimit
284	PTR sys_getrusage
285	PTR sys_gettimeofday
286	PTR sys_settimeofday
287	PTR sys_getgroups /* 4080 */
288	PTR sys_setgroups
289	PTR sys_ni_syscall /* old_select */
290	PTR sys_symlink
291	PTR sys_ni_syscall /* was sys_lstat */
292	PTR sys_readlink /* 4085 */
293	PTR sys_uselib
294	PTR sys_swapon
295	PTR sys_reboot
296	PTR sys_old_readdir
297	PTR sys_mips_mmap /* 4090 */
298	PTR sys_munmap
299	PTR sys_truncate
300	PTR sys_ftruncate
301	PTR sys_fchmod
302	PTR sys_fchown /* 4095 */
303	PTR sys_getpriority
304	PTR sys_setpriority
305	PTR sys_ni_syscall
306	PTR sys_statfs
307	PTR sys_fstatfs /* 4100 */
308	PTR sys_ni_syscall /* was ioperm(2) */
309	PTR sys_socketcall
310	PTR sys_syslog
311	PTR sys_setitimer
312	PTR sys_getitimer /* 4105 */
313	PTR sys_newstat
314	PTR sys_newlstat
315	PTR sys_newfstat
316	PTR sys_uname
317	PTR sys_ni_syscall /* 4110 was iopl(2) */
318	PTR sys_vhangup
319	PTR sys_ni_syscall /* was sys_idle() */
320	PTR sys_ni_syscall /* was sys_vm86 */
321	PTR sys_wait4
322	PTR sys_swapoff /* 4115 */
323	PTR sys_sysinfo
324	PTR sys_ipc
325	PTR sys_fsync
326	PTR sys_sigreturn
327	PTR __sys_clone /* 4120 */
328	PTR sys_setdomainname
329	PTR sys_newuname
330	PTR sys_ni_syscall /* sys_modify_ldt */
331	PTR sys_adjtimex
332	PTR sys_mprotect /* 4125 */
333	PTR sys_sigprocmask
334	PTR sys_ni_syscall /* was create_module */
335	PTR sys_init_module
336	PTR sys_delete_module
337	PTR sys_ni_syscall /* 4130 was get_kernel_syms */
338	PTR sys_quotactl
339	PTR sys_getpgid
340	PTR sys_fchdir
341	PTR sys_bdflush
342	PTR sys_sysfs /* 4135 */
343	PTR sys_personality
344	PTR sys_ni_syscall /* for afs_syscall */
345	PTR sys_setfsuid
346	PTR sys_setfsgid
347	PTR sys_llseek /* 4140 */
348	PTR sys_getdents
349	PTR sys_select
350	PTR sys_flock
351	PTR sys_msync
352	PTR sys_readv /* 4145 */
353	PTR sys_writev
354	PTR sys_cacheflush
355	PTR sys_cachectl
356	PTR sys_sysmips
357	PTR sys_ni_syscall /* 4150 */
358	PTR sys_getsid
359	PTR sys_fdatasync
360	PTR sys_sysctl
361	PTR sys_mlock
362	PTR sys_munlock /* 4155 */
363	PTR sys_mlockall
364	PTR sys_munlockall
365	PTR sys_sched_setparam
366	PTR sys_sched_getparam
367	PTR sys_sched_setscheduler /* 4160 */
368	PTR sys_sched_getscheduler
369	PTR sys_sched_yield
370	PTR sys_sched_get_priority_max
371	PTR sys_sched_get_priority_min
372	PTR sys_sched_rr_get_interval /* 4165 */
373	PTR sys_nanosleep
374	PTR sys_mremap
375	PTR sys_accept
376	PTR sys_bind
377	PTR sys_connect /* 4170 */
378	PTR sys_getpeername
379	PTR sys_getsockname
380	PTR sys_getsockopt
381	PTR sys_listen
382	PTR sys_recv /* 4175 */
383	PTR sys_recvfrom
384	PTR sys_recvmsg
385	PTR sys_send
386	PTR sys_sendmsg
387	PTR sys_sendto /* 4180 */
388	PTR sys_setsockopt
389	PTR sys_shutdown
390	PTR sys_socket
391	PTR sys_socketpair
392	PTR sys_setresuid /* 4185 */
393	PTR sys_getresuid
394	PTR sys_ni_syscall /* was sys_query_module */
395	PTR sys_poll
396	PTR sys_ni_syscall /* was nfsservctl */
397	PTR sys_setresgid /* 4190 */
398	PTR sys_getresgid
399	PTR sys_prctl
400	PTR sys_rt_sigreturn
401	PTR sys_rt_sigaction
402	PTR sys_rt_sigprocmask /* 4195 */
403	PTR sys_rt_sigpending
404	PTR sys_rt_sigtimedwait
405	PTR sys_rt_sigqueueinfo
406	PTR sys_rt_sigsuspend
407	PTR sys_pread64 /* 4200 */
408	PTR sys_pwrite64
409	PTR sys_chown
410	PTR sys_getcwd
411	PTR sys_capget
412	PTR sys_capset /* 4205 */
413	PTR sys_sigaltstack
414	PTR sys_sendfile
415	PTR sys_ni_syscall
416	PTR sys_ni_syscall
417	PTR sys_mips_mmap2 /* 4210 */
418	PTR sys_truncate64
419	PTR sys_ftruncate64
420	PTR sys_stat64
421	PTR sys_lstat64
422	PTR sys_fstat64 /* 4215 */
423	PTR sys_pivot_root
424	PTR sys_mincore
425	PTR sys_madvise
426	PTR sys_getdents64
427	PTR sys_fcntl64 /* 4220 */
428	PTR sys_ni_syscall
429	PTR sys_gettid
430	PTR sys_readahead
431	PTR sys_setxattr
432	PTR sys_lsetxattr /* 4225 */
433	PTR sys_fsetxattr
434	PTR sys_getxattr
435	PTR sys_lgetxattr
436	PTR sys_fgetxattr
437	PTR sys_listxattr /* 4230 */
438	PTR sys_llistxattr
439	PTR sys_flistxattr
440	PTR sys_removexattr
441	PTR sys_lremovexattr
442	PTR sys_fremovexattr /* 4235 */
443	PTR sys_tkill
444	PTR sys_sendfile64
445	PTR sys_futex
f088fc84 RB	446	#ifdef CONFIG_MIPS_MT_FPAFF
	447	/*
	448	* For FPU affinity scheduling on MIPS MT processors, we need to
	449	* intercept sys_sched_xxxaffinity() calls until we get a proper hook
0a0fca9d VK	450	* in kernel/sched/core.c. Considered only temporary we only support
	451	* these hooks for the 32-bit kernel - there is no MIPS64 MT processor
	452	* atm.
f088fc84	453	*/
46e12c07 RB	454	PTR mipsmt_sys_sched_setaffinity
46e12c07 RB	455	PTR mipsmt_sys_sched_getaffinity
f088fc84	456	#else
46e12c07 RB	457	PTR sys_sched_setaffinity
46e12c07 RB	458	PTR sys_sched_getaffinity /* 4240 */
f088fc84	459	#endif /* CONFIG_MIPS_MT_FPAFF */
46e12c07 RB	460	PTR sys_io_setup
	461	PTR sys_io_destroy
	462	PTR sys_io_getevents
	463	PTR sys_io_submit
	464	PTR sys_io_cancel /* 4245 */
	465	PTR sys_exit_group
	466	PTR sys_lookup_dcookie
	467	PTR sys_epoll_create
	468	PTR sys_epoll_ctl
	469	PTR sys_epoll_wait /* 4250 */
	470	PTR sys_remap_file_pages
	471	PTR sys_set_tid_address
	472	PTR sys_restart_syscall
	473	PTR sys_fadvise64_64
	474	PTR sys_statfs64 /* 4255 */
	475	PTR sys_fstatfs64
	476	PTR sys_timer_create
	477	PTR sys_timer_settime
	478	PTR sys_timer_gettime
	479	PTR sys_timer_getoverrun /* 4260 */
	480	PTR sys_timer_delete
	481	PTR sys_clock_settime
	482	PTR sys_clock_gettime
	483	PTR sys_clock_getres
	484	PTR sys_clock_nanosleep /* 4265 */
	485	PTR sys_tgkill
	486	PTR sys_utimes
	487	PTR sys_mbind
	488	PTR sys_ni_syscall /* sys_get_mempolicy */
	489	PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
	490	PTR sys_mq_open
	491	PTR sys_mq_unlink
	492	PTR sys_mq_timedsend
	493	PTR sys_mq_timedreceive
	494	PTR sys_mq_notify /* 4275 */
	495	PTR sys_mq_getsetattr
	496	PTR sys_ni_syscall /* sys_vserver */
	497	PTR sys_waitid
	498	PTR sys_ni_syscall /* available, was setaltroot */
	499	PTR sys_add_key /* 4280 */
	500	PTR sys_request_key
	501	PTR sys_keyctl
	502	PTR sys_set_thread_area
	503	PTR sys_inotify_init
	504	PTR sys_inotify_add_watch /* 4285 */
	505	PTR sys_inotify_rm_watch
	506	PTR sys_migrate_pages
	507	PTR sys_openat
	508	PTR sys_mkdirat
	509	PTR sys_mknodat /* 4290 */
	510	PTR sys_fchownat
	511	PTR sys_futimesat
	512	PTR sys_fstatat64
	513	PTR sys_unlinkat
	514	PTR sys_renameat /* 4295 */
	515	PTR sys_linkat
	516	PTR sys_symlinkat
	517	PTR sys_readlinkat
	518	PTR sys_fchmodat
	519	PTR sys_faccessat /* 4300 */
	520	PTR sys_pselect6
	521	PTR sys_ppoll
	522	PTR sys_unshare
	523	PTR sys_splice
524	PTR sys_sync_file_range /* 4305 */
525	PTR sys_tee
526	PTR sys_vmsplice
527	PTR sys_move_pages
528	PTR sys_set_robust_list
529	PTR sys_get_robust_list /* 4310 */
530	PTR sys_kexec_load
531	PTR sys_getcpu
532	PTR sys_epoll_pwait
533	PTR sys_ioprio_set
534	PTR sys_ioprio_get /* 4315 */
535	PTR sys_utimensat
536	PTR sys_signalfd
537	PTR sys_ni_syscall /* was timerfd */
538	PTR sys_eventfd
539	PTR sys_fallocate /* 4320 */
540	PTR sys_timerfd_create
541	PTR sys_timerfd_gettime
542	PTR sys_timerfd_settime
543	PTR sys_signalfd4
544	PTR sys_eventfd2 /* 4325 */
545	PTR sys_epoll_create1
546	PTR sys_dup3
547	PTR sys_pipe2
548	PTR sys_inotify_init1
549	PTR sys_preadv /* 4330 */
550	PTR sys_pwritev
551	PTR sys_rt_tgsigqueueinfo
552	PTR sys_perf_event_open
553	PTR sys_accept4
554	PTR sys_recvmmsg /* 4335 */
555	PTR sys_fanotify_init
556	PTR sys_fanotify_mark
557	PTR sys_prlimit64
558	PTR sys_name_to_handle_at
559	PTR sys_open_by_handle_at /* 4340 */
560	PTR sys_clock_adjtime
561	PTR sys_syncfs
562	PTR sys_sendmmsg
563	PTR sys_setns
564	PTR sys_process_vm_readv /* 4345 */
565	PTR sys_process_vm_writev
566	PTR sys_kcmp
567	PTR sys_finit_module
6776254b JH	568	PTR sys_sched_setattr
6776254b JH	569	PTR sys_sched_getattr /* 4350 */