[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / mips / kernel / scall64-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 - 2000, 2001 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2001 MIPS Technologies, Inc.
 * Copyright (C) 2004 Thiemo Seufer
 *
 * Hairy, the userspace application uses a different argument passing
 * convention than the kernel, so we have to translate things from o32
 * to ABI64 calling convention.  64-bit syscalls are also processed
 * here for now.
 */
#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/thread_info.h>
#include <asm/unistd.h>
#include <asm/sysmips.h>

	.align  5
NESTED(handle_sys, PT_SIZE, sp)
	.set	noat
	SAVE_SOME
	TRACE_IRQS_ON_RELOAD
	STI
	.set	at
	ld	t1, PT_EPC(sp)		# skip syscall on return

	dsubu	t0, v0, __NR_O32_Linux	# check syscall number
	sltiu	t0, t0, __NR_O32_Linux_syscalls + 1
	daddiu	t1, 4			# skip to next instruction
	sd	t1, PT_EPC(sp)
	beqz	t0, not_o32_scall
#if 0
 SAVE_ALL
 move a1, v0
 PRINT("Scall %ld\n")
 RESTORE_ALL
#endif

	/* We don't want to stumble over broken sign extensions from
	   userland. O32 does never use the upper half. */
	sll	a0, a0, 0
	sll	a1, a1, 0
	sll	a2, a2, 0
	sll	a3, a3, 0

	dsll	t0, v0, 3		# offset into table
	ld	t2, (sys_call_table - (__NR_O32_Linux * 8))(t0)

	sd	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).
	 *
	 * 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.
	 */
	ld	t0, PT_R29(sp)		# get old user stack pointer
	daddu	t1, t0, 32
	bltz	t1, bad_stack

1:	lw	a4, 16(t0)		# argument #5 from usp
2:	lw	a5, 20(t0)		# argument #6 from usp
3:	lw	a6, 24(t0)		# argument #7 from usp
4:	lw	a7, 28(t0)		# argument #8 from usp (for indirect syscalls)

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

	li	t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
	LONG_L	t0, TI_FLAGS($28)	# syscall tracing enabled?
	and	t0, t1, t0
	bnez	t0, trace_a_syscall

	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

	ld	t1, PT_R2(sp)		# syscall number
	dnegu	v0			# error
	sd	t1, PT_R0(sp)		# save it for syscall restarting
1:	sd	v0, PT_R2(sp)		# result

o32_syscall_exit:
	local_irq_disable		# make need_resched and
					# signals dont change between
					# sampling and return
	LONG_L	a2, TI_FLAGS($28)
	li	t0, _TIF_ALLWORK_MASK
	and	t0, a2, t0
	bnez	t0, o32_syscall_exit_work

	j	restore_partial

o32_syscall_exit_work:
	j	syscall_exit_work_partial

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

trace_a_syscall:
	SAVE_STATIC
	sd	a4, PT_R8(sp)		# Save argument registers
	sd	a5, PT_R9(sp)
	sd	a6, PT_R10(sp)
	sd	a7, PT_R11(sp)		# For indirect syscalls

	move	s0, t2			# Save syscall pointer
	move	a0, sp
	jal	syscall_trace_enter

	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)
	ld	a6, PT_R10(sp)
	ld	a7, PT_R11(sp)		# For indirect syscalls
	jalr	t0

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

	ld	t1, PT_R2(sp)		# syscall number
	dnegu	v0			# error
	sd	t1, PT_R0(sp)		# save it for syscall restarting
1:	sd	v0, PT_R2(sp)		# result

	j	syscall_exit

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

	/*
	 * The stackpointer for a call with more than 4 arguments is bad.
	 */
bad_stack:
	li	v0, EFAULT
	sd	v0, PT_R2(sp)
	li	t0, 1			# set error flag
	sd	t0, PT_R7(sp)
	j	o32_syscall_exit

not_o32_scall:
	/*
	 * This is not an o32 compatibility syscall, pass it on
	 * to the 64-bit syscall handlers.
	 */
#ifdef CONFIG_MIPS32_N32
	j	handle_sysn32
#else
	j	handle_sys64
#endif
	END(handle_sys)

LEAF(sys32_syscall)
	subu	t0, a0, __NR_O32_Linux	# check syscall number
	sltiu	v0, t0, __NR_O32_Linux_syscalls + 1
	beqz	t0, einval		# do not recurse
	dsll	t1, t0, 3
	beqz	v0, einval
	ld	t2, sys_call_table(t1)		# syscall routine

	move	a0, a1			# shift argument registers
	move	a1, a2
	move	a2, a3
	move	a3, a4
	move	a4, a5
	move	a5, a6
	move	a6, a7
	sd	a0, PT_R4(sp)		# ... and push back a0 - a3, some
	sd	a1, PT_R5(sp)		# syscalls expect them there
	sd	a2, PT_R6(sp)
	sd	a3, PT_R7(sp)
	sd	a3, PT_R26(sp)		# update a3 for syscall restarting
	jr	t2
	/* Unreached */

einval:	li	v0, -ENOSYS
	jr	ra
	END(sys32_syscall)

	.align	3
	.type	sys_call_table,@object
sys_call_table:
	PTR	sys32_syscall			/* 4000 */
	PTR	sys_exit
	PTR	sys_fork
	PTR	sys_read
	PTR	sys_write
	PTR	compat_sys_open			/* 4005 */
	PTR	sys_close
	PTR	sys_waitpid
	PTR	sys_creat
	PTR	sys_link
	PTR	sys_unlink			/* 4010 */
	PTR	sys32_execve
	PTR	sys_chdir
	PTR	compat_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	compat_sys_mount
	PTR	sys_oldumount
	PTR	sys_setuid
	PTR	sys_getuid
	PTR	compat_sys_stime		/* 4025 */
	PTR	compat_sys_ptrace
	PTR	sys_alarm
	PTR	sys_ni_syscall			/* was sys_fstat */
	PTR	sys_pause
	PTR	compat_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	compat_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	compat_sys_ioctl
	PTR	compat_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	compat_sys_ustat
	PTR	sys_dup2
	PTR	sys_getppid
	PTR	sys_getpgrp			/* 4065 */
	PTR	sys_setsid
	PTR	sys_32_sigaction
	PTR	sys_sgetmask
	PTR	sys_ssetmask
	PTR	sys_setreuid			/* 4070 */
	PTR	sys_setregid
	PTR	sys32_sigsuspend
	PTR	compat_sys_sigpending
	PTR	sys_sethostname
	PTR	compat_sys_setrlimit		/* 4075 */
	PTR	compat_sys_getrlimit
	PTR	compat_sys_getrusage
	PTR	compat_sys_gettimeofday
	PTR	compat_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	compat_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	compat_sys_statfs
	PTR	compat_sys_fstatfs		/* 4100 */
	PTR	sys_ni_syscall			/* sys_ioperm */
	PTR	compat_sys_socketcall
	PTR	sys_syslog
	PTR	compat_sys_setitimer
	PTR	compat_sys_getitimer		/* 4105 */
	PTR	compat_sys_newstat
	PTR	compat_sys_newlstat
	PTR	compat_sys_newfstat
	PTR	sys_uname
	PTR	sys_ni_syscall			/* sys_ioperm  *//* 4110 */
	PTR	sys_vhangup
	PTR	sys_ni_syscall			/* was sys_idle	 */
	PTR	sys_ni_syscall			/* sys_vm86 */
	PTR	compat_sys_wait4
	PTR	sys_swapoff			/* 4115 */
	PTR	compat_sys_sysinfo
	PTR	sys_32_ipc
	PTR	sys_fsync
	PTR	sys32_sigreturn
	PTR	sys32_clone			/* 4120 */
	PTR	sys_setdomainname
	PTR	sys_newuname
	PTR	sys_ni_syscall			/* sys_modify_ldt */
	PTR	compat_sys_adjtimex
	PTR	sys_mprotect			/* 4125 */
	PTR	compat_sys_sigprocmask
	PTR	sys_ni_syscall			/* was creat_module */
	PTR	sys_init_module
	PTR	sys_delete_module
	PTR	sys_ni_syscall			/* 4130, get_kernel_syms */
	PTR	sys_quotactl
	PTR	sys_getpgid
	PTR	sys_fchdir
	PTR	sys_bdflush
	PTR	sys_sysfs			/* 4135 */
	PTR	sys_32_personality
	PTR	sys_ni_syscall	 		/* for afs_syscall */
	PTR	sys_setfsuid
	PTR	sys_setfsgid
	PTR	sys_32_llseek			/* 4140 */
	PTR	compat_sys_getdents
	PTR	compat_sys_select
	PTR	sys_flock
	PTR	sys_msync
	PTR	compat_sys_readv		/* 4145 */
	PTR	compat_sys_writev
	PTR	sys_cacheflush
	PTR	sys_cachectl
	PTR	sys_sysmips
	PTR	sys_ni_syscall			/* 4150 */
	PTR	sys_getsid
	PTR	sys_fdatasync
	PTR	compat_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_32_sched_rr_get_interval 	/* 4165 */
	PTR	compat_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	compat_sys_recv			/* 4175 */
	PTR	compat_sys_recvfrom
	PTR	compat_sys_recvmsg
	PTR	sys_send
	PTR	compat_sys_sendmsg
	PTR	sys_sendto			/* 4180 */
	PTR	compat_sys_setsockopt
	PTR	sys_shutdown
	PTR	sys_socket
	PTR	sys_socketpair
	PTR	sys_setresuid			/* 4185 */
	PTR	sys_getresuid
	PTR	sys_ni_syscall			/* was query_module */
	PTR	sys_poll
	PTR	sys_ni_syscall			/* was nfsservctl */
	PTR	sys_setresgid			/* 4190 */
	PTR	sys_getresgid
	PTR	sys_prctl
	PTR	sys32_rt_sigreturn
	PTR	sys_32_rt_sigaction
	PTR	sys_32_rt_sigprocmask 		/* 4195 */
	PTR	sys_32_rt_sigpending
	PTR	compat_sys_rt_sigtimedwait
	PTR	sys_32_rt_sigqueueinfo
	PTR	sys32_rt_sigsuspend
	PTR	sys_32_pread			/* 4200 */
	PTR	sys_32_pwrite
	PTR	sys_chown
	PTR	sys_getcwd
	PTR	sys_capget
	PTR	sys_capset			/* 4205 */
	PTR	sys32_sigaltstack
	PTR	sys_32_sendfile
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall
	PTR	sys_mips_mmap2			/* 4210 */
	PTR	sys_32_truncate64
	PTR	sys_32_ftruncate64
	PTR	sys_newstat
	PTR	sys_newlstat
	PTR	sys_newfstat			/* 4215 */
	PTR	sys_pivot_root
	PTR	sys_mincore
	PTR	sys_madvise
	PTR	sys_getdents64
	PTR	compat_sys_fcntl64		/* 4220 */
	PTR	sys_ni_syscall
	PTR	sys_gettid
	PTR	sys32_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_32_futex
	PTR	compat_sys_sched_setaffinity
	PTR	compat_sys_sched_getaffinity	/* 4240 */
	PTR	compat_sys_io_setup
	PTR	sys_io_destroy
	PTR	compat_sys_io_getevents
	PTR	compat_sys_io_submit
	PTR	sys_io_cancel			/* 4245 */
	PTR	sys_exit_group
	PTR	sys32_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	sys32_fadvise64_64
	PTR	compat_sys_statfs64		/* 4255 */
	PTR	compat_sys_fstatfs64
	PTR	compat_sys_timer_create
	PTR	compat_sys_timer_settime
	PTR	compat_sys_timer_gettime
	PTR	sys_timer_getoverrun		/* 4260 */
	PTR	sys_timer_delete
	PTR	compat_sys_clock_settime
	PTR	compat_sys_clock_gettime
	PTR	compat_sys_clock_getres
	PTR	compat_sys_clock_nanosleep	/* 4265 */
	PTR	sys_tgkill
	PTR	compat_sys_utimes
	PTR	sys_ni_syscall			/* sys_mbind */
	PTR	sys_ni_syscall			/* sys_get_mempolicy */
	PTR	sys_ni_syscall			/* 4270 sys_set_mempolicy */
	PTR	compat_sys_mq_open
	PTR	sys_mq_unlink
	PTR	compat_sys_mq_timedsend
	PTR	compat_sys_mq_timedreceive
	PTR	compat_sys_mq_notify		/* 4275 */
	PTR	compat_sys_mq_getsetattr
	PTR	sys_ni_syscall			/* sys_vserver */
	PTR	sys_32_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	compat_sys_openat
	PTR	sys_mkdirat
	PTR	sys_mknodat			/* 4290 */
	PTR	sys_fchownat
	PTR	compat_sys_futimesat
	PTR	sys_newfstatat
	PTR	sys_unlinkat
	PTR	sys_renameat			/* 4295 */
	PTR	sys_linkat
	PTR	sys_symlinkat
	PTR	sys_readlinkat
	PTR	sys_fchmodat
	PTR	sys_faccessat			/* 4300 */
	PTR	compat_sys_pselect6
	PTR	compat_sys_ppoll
	PTR	sys_unshare
	PTR	sys_splice
	PTR	sys32_sync_file_range		/* 4305 */
	PTR	sys_tee
	PTR	compat_sys_vmsplice
	PTR	compat_sys_move_pages
	PTR	compat_sys_set_robust_list
	PTR	compat_sys_get_robust_list	/* 4310 */
	PTR	compat_sys_kexec_load
	PTR	sys_getcpu
	PTR	compat_sys_epoll_pwait
	PTR	sys_ioprio_set
	PTR	sys_ioprio_get			/* 4315 */
	PTR	compat_sys_utimensat
	PTR	compat_sys_signalfd
	PTR	sys_ni_syscall			/* was timerfd */
	PTR	sys_eventfd
	PTR	sys32_fallocate			/* 4320 */
	PTR	sys_timerfd_create
	PTR	compat_sys_timerfd_gettime
	PTR	compat_sys_timerfd_settime
	PTR	compat_sys_signalfd4
	PTR	sys_eventfd2			/* 4325 */
	PTR	sys_epoll_create1
	PTR	sys_dup3
	PTR	sys_pipe2
	PTR	sys_inotify_init1
	PTR	compat_sys_preadv		/* 4330 */
	PTR	compat_sys_pwritev
	PTR	compat_sys_rt_tgsigqueueinfo
	PTR	sys_perf_event_open
	PTR	sys_accept4
	PTR	compat_sys_recvmmsg		/* 4335 */
	PTR	sys_fanotify_init
	PTR	sys_32_fanotify_mark
	PTR	sys_prlimit64
	PTR	sys_name_to_handle_at
	PTR	compat_sys_open_by_handle_at	/* 4340 */
	PTR	compat_sys_clock_adjtime
	PTR	sys_syncfs
	PTR	compat_sys_sendmmsg
	PTR	sys_setns
	PTR	compat_sys_process_vm_readv	/* 4345 */
	PTR	compat_sys_process_vm_writev
	.size	sys_call_table,.-sys_call_table
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	*
	6	* Copyright (C) 1995 - 2000, 2001 by Ralf Baechle
	7	* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
	8	* Copyright (C) 2001 MIPS Technologies, Inc.
	9	* Copyright (C) 2004 Thiemo Seufer
	10	*
	11	* Hairy, the userspace application uses a different argument passing
	12	* convention than the kernel, so we have to translate things from o32
	13	* to ABI64 calling convention. 64-bit syscalls are also processed
	14	* here for now.
	15	*/
1da177e4 LT	16	#include <linux/errno.h>
	17	#include <asm/asm.h>
	18	#include <asm/asmmacro.h>
192ef366	19	#include <asm/irqflags.h>
1da177e4 LT	20	#include <asm/mipsregs.h>
	21	#include <asm/regdef.h>
	22	#include <asm/stackframe.h>
	23	#include <asm/thread_info.h>
	24	#include <asm/unistd.h>
	25	#include <asm/sysmips.h>
	26
	27	.align 5
	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	ld t1, PT_EPC(sp) # skip syscall on return
	35
	36	dsubu t0, v0, __NR_O32_Linux # check syscall number
	37	sltiu t0, t0, __NR_O32_Linux_syscalls + 1
	38	daddiu t1, 4 # skip to next instruction
	39	sd t1, PT_EPC(sp)
	40	beqz t0, not_o32_scall
	41	#if 0
	42	SAVE_ALL
	43	move a1, v0
	44	PRINT("Scall %ld\n")
	45	RESTORE_ALL
	46	#endif
	47
	48	/* We don't want to stumble over broken sign extensions from
	49	userland. O32 does never use the upper half. */
	50	sll a0, a0, 0
	51	sll a1, a1, 0
	52	sll a2, a2, 0
	53	sll a3, a3, 0
	54
	55	dsll t0, v0, 3 # offset into table
	56	ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0)
	57
	58	sd a3, PT_R26(sp) # save a3 for syscall restarting
	59
	60	/*
	61	* More than four arguments. Try to deal with it by copying the
	62	* stack arguments from the user stack to the kernel stack.
	63	* This Sucks (TM).
	64	*
	65	* We intentionally keep the kernel stack a little below the top of
	66	* userspace so we don't have to do a slower byte accurate check here.
	67	*/
	68	ld t0, PT_R29(sp) # get old user stack pointer
	69	daddu t1, t0, 32
	70	bltz t1, bad_stack
	71
	72	1: lw a4, 16(t0) # argument #5 from usp
	73	2: lw a5, 20(t0) # argument #6 from usp
	74	3: lw a6, 24(t0) # argument #7 from usp
	75	4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls)
	76
	77	.section __ex_table,"a"
	78	PTR 1b, bad_stack
	79	PTR 2b, bad_stack
	80	PTR 3b, bad_stack
	81	PTR 4b, bad_stack
	82	.previous
	83
	84	li t1, _TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT
	85	LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
	86	and t0, t1, t0
	87	bnez t0, trace_a_syscall
	88
	89	jalr t2 # Do The Real Thing (TM)
	90
	91	li t0, -EMAXERRNO - 1 # error?
	92	sltu t0, t0, v0
	93	sd t0, PT_R7(sp) # set error flag
	94	beqz t0, 1f
	95
8f5a00eb	96	ld t1, PT_R2(sp) # syscall number
1da177e4	97	dnegu v0 # error
8f5a00eb	98	sd t1, PT_R0(sp) # save it for syscall restarting
1da177e4 LT	99	1: sd v0, PT_R2(sp) # result
	100
	101	o32_syscall_exit:
	102	local_irq_disable # make need_resched and
	103	# signals dont change between
	104	# sampling and return
	105	LONG_L a2, TI_FLAGS($28)
	106	li t0, _TIF_ALLWORK_MASK
	107	and t0, a2, t0
	108	bnez t0, o32_syscall_exit_work
	109
	110	j restore_partial
	111
	112	o32_syscall_exit_work:
	113	j syscall_exit_work_partial
	114
	115	/* ------------------------------------------------------------------------ */
	116
	117	trace_a_syscall:
	118	SAVE_STATIC
	119	sd a4, PT_R8(sp) # Save argument registers
	120	sd a5, PT_R9(sp)
	121	sd a6, PT_R10(sp)
	122	sd a7, PT_R11(sp) # For indirect syscalls
	123
	124	move s0, t2 # Save syscall pointer
	125	move a0, sp
8b659a39	126	jal syscall_trace_enter
1da177e4	127
04a7052c RB	128	move t0, s0
04a7052c RB	129	RESTORE_STATIC
1da177e4 LT	130	ld a0, PT_R4(sp) # Restore argument registers
	131	ld a1, PT_R5(sp)
	132	ld a2, PT_R6(sp)
	133	ld a3, PT_R7(sp)
	134	ld a4, PT_R8(sp)
	135	ld a5, PT_R9(sp)
	136	ld a6, PT_R10(sp)
	137	ld a7, PT_R11(sp) # For indirect syscalls
04a7052c	138	jalr t0
1da177e4 LT	139
	140	li t0, -EMAXERRNO - 1 # error?
	141	sltu t0, t0, v0
	142	sd t0, PT_R7(sp) # set error flag
	143	beqz t0, 1f
	144
8f5a00eb	145	ld t1, PT_R2(sp) # syscall number
1da177e4	146	dnegu v0 # error
8f5a00eb	147	sd t1, PT_R0(sp) # save it for syscall restarting
1da177e4 LT	148	1: sd v0, PT_R2(sp) # result
	149
	150	j syscall_exit
	151
	152	/* ------------------------------------------------------------------------ */
	153
	154	/*
	155	* The stackpointer for a call with more than 4 arguments is bad.
	156	*/
	157	bad_stack:
5b89c004	158	li v0, EFAULT
1da177e4 LT	159	sd v0, PT_R2(sp)
	160	li t0, 1 # set error flag
	161	sd t0, PT_R7(sp)
	162	j o32_syscall_exit
	163
	164	not_o32_scall:
	165	/*
	166	* This is not an o32 compatibility syscall, pass it on
	167	* to the 64-bit syscall handlers.
	168	*/
	169	#ifdef CONFIG_MIPS32_N32
	170	j handle_sysn32
	171	#else
	172	j handle_sys64
	173	#endif
	174	END(handle_sys)
	175
	176	LEAF(sys32_syscall)
e807f957 VM	177	subu t0, a0, __NR_O32_Linux # check syscall number
	178	sltiu v0, t0, __NR_O32_Linux_syscalls + 1
	179	beqz t0, einval # do not recurse
	180	dsll t1, t0, 3
1da177e4	181	beqz v0, einval
e807f957	182	ld t2, sys_call_table(t1) # syscall routine
1da177e4 LT	183
	184	move a0, a1 # shift argument registers
	185	move a1, a2
	186	move a2, a3
	187	move a3, a4
	188	move a4, a5
	189	move a5, a6
	190	move a6, a7
	191	sd a0, PT_R4(sp) # ... and push back a0 - a3, some
	192	sd a1, PT_R5(sp) # syscalls expect them there
	193	sd a2, PT_R6(sp)
	194	sd a3, PT_R7(sp)
	195	sd a3, PT_R26(sp) # update a3 for syscall restarting
	196	jr t2
	197	/* Unreached */
	198
c6cb4df9	199	einval: li v0, -ENOSYS
1da177e4 LT	200	jr ra
	201	END(sys32_syscall)
	202
	203	.align 3
	204	.type sys_call_table,@object
	205	sys_call_table:
	206	PTR sys32_syscall /* 4000 */
	207	PTR sys_exit
	208	PTR sys_fork
	209	PTR sys_read
	210	PTR sys_write
7155262e	211	PTR compat_sys_open /* 4005 */
1da177e4 LT	212	PTR sys_close
	213	PTR sys_waitpid
	214	PTR sys_creat
	215	PTR sys_link
	216	PTR sys_unlink /* 4010 */
	217	PTR sys32_execve
	218	PTR sys_chdir
	219	PTR compat_sys_time
	220	PTR sys_mknod
	221	PTR sys_chmod /* 4015 */
	222	PTR sys_lchown
	223	PTR sys_ni_syscall
	224	PTR sys_ni_syscall /* was sys_stat */
	225	PTR sys_lseek
	226	PTR sys_getpid /* 4020 */
089c7e7f	227	PTR compat_sys_mount
1da177e4 LT	228	PTR sys_oldumount
	229	PTR sys_setuid
	230	PTR sys_getuid
	231	PTR compat_sys_stime /* 4025 */
5d9a76cd	232	PTR compat_sys_ptrace
1da177e4 LT	233	PTR sys_alarm
	234	PTR sys_ni_syscall /* was sys_fstat */
	235	PTR sys_pause
	236	PTR compat_sys_utime /* 4030 */
	237	PTR sys_ni_syscall
	238	PTR sys_ni_syscall
	239	PTR sys_access
	240	PTR sys_nice
	241	PTR sys_ni_syscall /* 4035 */
	242	PTR sys_sync
	243	PTR sys_kill
	244	PTR sys_rename
	245	PTR sys_mkdir
	246	PTR sys_rmdir /* 4040 */
	247	PTR sys_dup
8213bbf9	248	PTR sysm_pipe
1da177e4 LT	249	PTR compat_sys_times
	250	PTR sys_ni_syscall
	251	PTR sys_brk /* 4045 */
	252	PTR sys_setgid
	253	PTR sys_getgid
	254	PTR sys_ni_syscall /* was signal 2 */
	255	PTR sys_geteuid
	256	PTR sys_getegid /* 4050 */
	257	PTR sys_acct
	258	PTR sys_umount
	259	PTR sys_ni_syscall
	260	PTR compat_sys_ioctl
	261	PTR compat_sys_fcntl /* 4055 */
	262	PTR sys_ni_syscall
	263	PTR sys_setpgid
	264	PTR sys_ni_syscall
	265	PTR sys_olduname
	266	PTR sys_umask /* 4060 */
	267	PTR sys_chroot
2b1c6bd7	268	PTR compat_sys_ustat
1da177e4 LT	269	PTR sys_dup2
	270	PTR sys_getppid
	271	PTR sys_getpgrp /* 4065 */
	272	PTR sys_setsid
dbda6ac0	273	PTR sys_32_sigaction
1da177e4 LT	274	PTR sys_sgetmask
	275	PTR sys_ssetmask
	276	PTR sys_setreuid /* 4070 */
	277	PTR sys_setregid
	278	PTR sys32_sigsuspend
	279	PTR compat_sys_sigpending
	280	PTR sys_sethostname
	281	PTR compat_sys_setrlimit /* 4075 */
	282	PTR compat_sys_getrlimit
	283	PTR compat_sys_getrusage
b418da16 CH	284	PTR compat_sys_gettimeofday
b418da16 CH	285	PTR compat_sys_settimeofday
1da177e4 LT	286	PTR sys_getgroups /* 4080 */
	287	PTR sys_setgroups
	288	PTR sys_ni_syscall /* old_select */
	289	PTR sys_symlink
	290	PTR sys_ni_syscall /* was sys_lstat */
	291	PTR sys_readlink /* 4085 */
	292	PTR sys_uselib
	293	PTR sys_swapon
	294	PTR sys_reboot
2fd628fe	295	PTR compat_sys_old_readdir
dbda6ac0	296	PTR sys_mips_mmap /* 4090 */
1da177e4 LT	297	PTR sys_munmap
	298	PTR sys_truncate
	299	PTR sys_ftruncate
	300	PTR sys_fchmod
	301	PTR sys_fchown /* 4095 */
	302	PTR sys_getpriority
	303	PTR sys_setpriority
	304	PTR sys_ni_syscall
	305	PTR compat_sys_statfs
	306	PTR compat_sys_fstatfs /* 4100 */
	307	PTR sys_ni_syscall /* sys_ioperm */
08274cef	308	PTR compat_sys_socketcall
1da177e4 LT	309	PTR sys_syslog
	310	PTR compat_sys_setitimer
	311	PTR compat_sys_getitimer /* 4105 */
	312	PTR compat_sys_newstat
	313	PTR compat_sys_newlstat
	314	PTR compat_sys_newfstat
	315	PTR sys_uname
	316	PTR sys_ni_syscall /* sys_ioperm // 4110 */
	317	PTR sys_vhangup
	318	PTR sys_ni_syscall /* was sys_idle */
	319	PTR sys_ni_syscall /* sys_vm86 */
b6e203d8	320	PTR compat_sys_wait4
1da177e4	321	PTR sys_swapoff /* 4115 */
d4d23add	322	PTR compat_sys_sysinfo
dbda6ac0	323	PTR sys_32_ipc
1da177e4 LT	324	PTR sys_fsync
1da177e4 LT	325	PTR sys32_sigreturn
3c37026d	326	PTR sys32_clone /* 4120 */
1da177e4	327	PTR sys_setdomainname
e28cbf22	328	PTR sys_newuname
1da177e4	329	PTR sys_ni_syscall /* sys_modify_ldt */
3158e941	330	PTR compat_sys_adjtimex
1da177e4 LT	331	PTR sys_mprotect /* 4125 */
	332	PTR compat_sys_sigprocmask
	333	PTR sys_ni_syscall /* was creat_module */
	334	PTR sys_init_module
	335	PTR sys_delete_module
	336	PTR sys_ni_syscall /* 4130, get_kernel_syms */
	337	PTR sys_quotactl
	338	PTR sys_getpgid
	339	PTR sys_fchdir
	340	PTR sys_bdflush
	341	PTR sys_sysfs /* 4135 */
dbda6ac0	342	PTR sys_32_personality
1da177e4 LT	343	PTR sys_ni_syscall /* for afs_syscall */
	344	PTR sys_setfsuid
	345	PTR sys_setfsgid
dbda6ac0	346	PTR sys_32_llseek /* 4140 */
2fd628fe	347	PTR compat_sys_getdents
1da177e4 LT	348	PTR compat_sys_select
	349	PTR sys_flock
	350	PTR sys_msync
	351	PTR compat_sys_readv /* 4145 */
	352	PTR compat_sys_writev
	353	PTR sys_cacheflush
	354	PTR sys_cachectl
	355	PTR sys_sysmips
	356	PTR sys_ni_syscall /* 4150 */
	357	PTR sys_getsid
	358	PTR sys_fdatasync
aff639cd	359	PTR compat_sys_sysctl
1da177e4 LT	360	PTR sys_mlock
	361	PTR sys_munlock /* 4155 */
	362	PTR sys_mlockall
	363	PTR sys_munlockall
	364	PTR sys_sched_setparam
	365	PTR sys_sched_getparam
	366	PTR sys_sched_setscheduler /* 4160 */
	367	PTR sys_sched_getscheduler
	368	PTR sys_sched_yield
	369	PTR sys_sched_get_priority_max
	370	PTR sys_sched_get_priority_min
dbda6ac0	371	PTR sys_32_sched_rr_get_interval /* 4165 */
1da177e4 LT	372	PTR compat_sys_nanosleep
	373	PTR sys_mremap
	374	PTR sys_accept
	375	PTR sys_bind
	376	PTR sys_connect /* 4170 */
	377	PTR sys_getpeername
	378	PTR sys_getsockname
	379	PTR sys_getsockopt
	380	PTR sys_listen
1dacc76d JB	381	PTR compat_sys_recv /* 4175 */
1dacc76d JB	382	PTR compat_sys_recvfrom
1da177e4 LT	383	PTR compat_sys_recvmsg
	384	PTR sys_send
	385	PTR compat_sys_sendmsg
	386	PTR sys_sendto /* 4180 */
	387	PTR compat_sys_setsockopt
	388	PTR sys_shutdown
	389	PTR sys_socket
	390	PTR sys_socketpair
	391	PTR sys_setresuid /* 4185 */
	392	PTR sys_getresuid
	393	PTR sys_ni_syscall /* was query_module */
	394	PTR sys_poll
f5b94099	395	PTR sys_ni_syscall /* was nfsservctl */
1da177e4 LT	396	PTR sys_setresgid /* 4190 */
	397	PTR sys_getresgid
	398	PTR sys_prctl
	399	PTR sys32_rt_sigreturn
dbda6ac0 RB	400	PTR sys_32_rt_sigaction
	401	PTR sys_32_rt_sigprocmask /* 4195 */
	402	PTR sys_32_rt_sigpending
1da177e4	403	PTR compat_sys_rt_sigtimedwait
dbda6ac0	404	PTR sys_32_rt_sigqueueinfo
1da177e4	405	PTR sys32_rt_sigsuspend
dbda6ac0 RB	406	PTR sys_32_pread /* 4200 */
dbda6ac0 RB	407	PTR sys_32_pwrite
1da177e4 LT	408	PTR sys_chown
	409	PTR sys_getcwd
	410	PTR sys_capget
	411	PTR sys_capset /* 4205 */
	412	PTR sys32_sigaltstack
dbda6ac0	413	PTR sys_32_sendfile
1da177e4 LT	414	PTR sys_ni_syscall
1da177e4 LT	415	PTR sys_ni_syscall
dbda6ac0 RB	416	PTR sys_mips_mmap2 /* 4210 */
	417	PTR sys_32_truncate64
	418	PTR sys_32_ftruncate64
1da177e4 LT	419	PTR sys_newstat
	420	PTR sys_newlstat
	421	PTR sys_newfstat /* 4215 */
	422	PTR sys_pivot_root
	423	PTR sys_mincore
	424	PTR sys_madvise
	425	PTR sys_getdents64
	426	PTR compat_sys_fcntl64 /* 4220 */
	427	PTR sys_ni_syscall
	428	PTR sys_gettid
	429	PTR sys32_readahead
	430	PTR sys_setxattr
	431	PTR sys_lsetxattr /* 4225 */
	432	PTR sys_fsetxattr
	433	PTR sys_getxattr
	434	PTR sys_lgetxattr
	435	PTR sys_fgetxattr
	436	PTR sys_listxattr /* 4230 */
	437	PTR sys_llistxattr
	438	PTR sys_flistxattr
	439	PTR sys_removexattr
	440	PTR sys_lremovexattr
	441	PTR sys_fremovexattr /* 4235 */
	442	PTR sys_tkill
	443	PTR sys_sendfile64
1eec6cd0	444	PTR sys_32_futex
1da177e4 LT	445	PTR compat_sys_sched_setaffinity
1da177e4 LT	446	PTR compat_sys_sched_getaffinity /* 4240 */
e2cc502c	447	PTR compat_sys_io_setup
1da177e4	448	PTR sys_io_destroy
e2cc502c MT	449	PTR compat_sys_io_getevents
e2cc502c MT	450	PTR compat_sys_io_submit
1da177e4 LT	451	PTR sys_io_cancel /* 4245 */
1da177e4 LT	452	PTR sys_exit_group
80b8585b	453	PTR sys32_lookup_dcookie
1da177e4 LT	454	PTR sys_epoll_create
	455	PTR sys_epoll_ctl
	456	PTR sys_epoll_wait /* 4250 */
	457	PTR sys_remap_file_pages
	458	PTR sys_set_tid_address
	459	PTR sys_restart_syscall
8676d2e0	460	PTR sys32_fadvise64_64
1da177e4 LT	461	PTR compat_sys_statfs64 /* 4255 */
1da177e4 LT	462	PTR compat_sys_fstatfs64
821d313c	463	PTR compat_sys_timer_create
1da177e4 LT	464	PTR compat_sys_timer_settime
	465	PTR compat_sys_timer_gettime
	466	PTR sys_timer_getoverrun /* 4260 */
	467	PTR sys_timer_delete
	468	PTR compat_sys_clock_settime
	469	PTR compat_sys_clock_gettime
	470	PTR compat_sys_clock_getres
	471	PTR compat_sys_clock_nanosleep /* 4265 */
	472	PTR sys_tgkill
	473	PTR compat_sys_utimes
	474	PTR sys_ni_syscall /* sys_mbind */
	475	PTR sys_ni_syscall /* sys_get_mempolicy */
	476	PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
	477	PTR compat_sys_mq_open
	478	PTR sys_mq_unlink
	479	PTR compat_sys_mq_timedsend
	480	PTR compat_sys_mq_timedreceive
	481	PTR compat_sys_mq_notify /* 4275 */
	482	PTR compat_sys_mq_getsetattr
	483	PTR sys_ni_syscall /* sys_vserver */
dbda6ac0	484	PTR sys_32_waitid
1da177e4 LT	485	PTR sys_ni_syscall /* available, was setaltroot */
	486	PTR sys_add_key /* 4280 */
	487	PTR sys_request_key
	488	PTR sys_keyctl
3c37026d	489	PTR sys_set_thread_area
7db36c85 RB	490	PTR sys_inotify_init
	491	PTR sys_inotify_add_watch /* 4285 */
	492	PTR sys_inotify_rm_watch
72bf8914 RB	493	PTR sys_migrate_pages
	494	PTR compat_sys_openat
	495	PTR sys_mkdirat
	496	PTR sys_mknodat /* 4290 */
	497	PTR sys_fchownat
	498	PTR compat_sys_futimesat
63415dbb	499	PTR sys_newfstatat
72bf8914 RB	500	PTR sys_unlinkat
	501	PTR sys_renameat /* 4295 */
	502	PTR sys_linkat
	503	PTR sys_symlinkat
	504	PTR sys_readlinkat
	505	PTR sys_fchmodat
	506	PTR sys_faccessat /* 4300 */
99d233fa	507	PTR compat_sys_pselect6
049a31af	508	PTR compat_sys_ppoll
72bf8914	509	PTR sys_unshare
f115da9c	510	PTR sys_splice
a8d587a7	511	PTR sys32_sync_file_range /* 4305 */
136d47d3	512	PTR sys_tee
8d13cb26	513	PTR compat_sys_vmsplice
722cfd90	514	PTR compat_sys_move_pages
7fdeb048 AN	515	PTR compat_sys_set_robust_list
7fdeb048 AN	516	PTR compat_sys_get_robust_list /* 4310 */
583bb86f	517	PTR compat_sys_kexec_load
991ea26d	518	PTR sys_getcpu
e016c38d	519	PTR compat_sys_epoll_pwait
08253b39 RB	520	PTR sys_ioprio_set
08253b39 RB	521	PTR sys_ioprio_get /* 4315 */
7a6d4f38 AN	522	PTR compat_sys_utimensat
7a6d4f38 AN	523	PTR compat_sys_signalfd
8bdd5142	524	PTR sys_ni_syscall /* was timerfd */
7a6d4f38	525	PTR sys_eventfd
422efb17	526	PTR sys32_fallocate /* 4320 */
6783fe62	527	PTR sys_timerfd_create
c7d16736 DD	528	PTR compat_sys_timerfd_gettime
c7d16736 DD	529	PTR compat_sys_timerfd_settime
3885b71b RB	530	PTR compat_sys_signalfd4
	531	PTR sys_eventfd2 /* 4325 */
	532	PTR sys_epoll_create1
	533	PTR sys_dup3
	534	PTR sys_pipe2
	535	PTR sys_inotify_init1
ddd9e91b RB	536	PTR compat_sys_preadv /* 4330 */
ddd9e91b RB	537	PTR compat_sys_pwritev
69f16c9a	538	PTR compat_sys_rt_tgsigqueueinfo
cdd6c482	539	PTR sys_perf_event_open
54822de7	540	PTR sys_accept4
5e844b31 DD	541	PTR compat_sys_recvmmsg /* 4335 */
	542	PTR sys_fanotify_init
	543	PTR sys_32_fanotify_mark
	544	PTR sys_prlimit64
84ed9432 DD	545	PTR sys_name_to_handle_at
	546	PTR compat_sys_open_by_handle_at /* 4340 */
	547	PTR compat_sys_clock_adjtime
1bbf2875	548	PTR sys_syncfs
b12acf16	549	PTR compat_sys_sendmmsg
7b21fddd	550	PTR sys_setns
8ff8584e DD	551	PTR compat_sys_process_vm_readv /* 4345 */
8ff8584e DD	552	PTR compat_sys_process_vm_writev
1da177e4	553	.size sys_call_table,.-sys_call_table