[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

	dnegu	v0			# error
	sd	v0, PT_R0(sp)		# flag 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
	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)
	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

	dnegu	v0			# error
	sd	v0, PT_R0(sp)		# set flag 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:
	dnegu	v0			# error
	sd	v0, PT_R0(sp)
	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)
	sltu	v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
	beqz	v0, einval

	dsll	v0, a0, 3
	ld	t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)

	li	v1, 4000		# indirect syscall number
	beq	a0, v1, einval		# do not recurse

	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, -EINVAL
	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	sys32_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	sys_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	sys32_ustat
	PTR	sys_dup2
	PTR	sys_getppid
	PTR	sys_getpgrp			/* 4065 */
	PTR	sys_setsid
	PTR	sys32_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	sys32_gettimeofday
	PTR	sys32_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	old_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	sys32_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	sys32_sysinfo
	PTR	sys32_ipc
	PTR	sys_fsync
	PTR	sys32_sigreturn
	PTR	sys32_clone			/* 4120 */
	PTR	sys_setdomainname
	PTR	sys32_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	sys32_personality
	PTR	sys_ni_syscall	 		/* for afs_syscall */
	PTR	sys_setfsuid
	PTR	sys_setfsgid
	PTR	sys32_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	sys32_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	sys32_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	sys_recv			/* 4175 */
	PTR	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	compat_sys_nfsservctl
	PTR	sys_setresgid			/* 4190 */
	PTR	sys_getresgid
	PTR	sys_prctl
	PTR	sys32_rt_sigreturn
	PTR	sys32_rt_sigaction
	PTR	sys32_rt_sigprocmask 		/* 4195 */
	PTR	sys32_rt_sigpending
	PTR	compat_sys_rt_sigtimedwait
	PTR	sys32_rt_sigqueueinfo
	PTR	sys32_rt_sigsuspend
	PTR	sys32_pread			/* 4200 */
	PTR	sys32_pwrite
	PTR	sys_chown
	PTR	sys_getcwd
	PTR	sys_capget
	PTR	sys_capset			/* 4205 */
	PTR	sys32_sigaltstack
	PTR	sys32_sendfile
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall
	PTR	sys32_mmap2			/* 4210 */
	PTR	sys32_truncate64
	PTR	sys32_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	compat_sys_futex
	PTR	compat_sys_sched_setaffinity
	PTR	compat_sys_sched_getaffinity	/* 4240 */
	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	compat_sys_statfs64		/* 4255 */
	PTR	compat_sys_fstatfs64
	PTR	sys32_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	sys32_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	sys_pselect6
	PTR	sys_ppoll
	PTR	sys_unshare
	PTR	sys_splice
	PTR	sys32_sync_file_range		/* 4305 */
	PTR	sys_tee
	PTR	sys_vmsplice
	PTR	compat_sys_move_pages
	PTR	compat_sys_set_robust_list
	PTR	compat_sys_get_robust_list	/* 4310 */
	PTR	sys_ni_syscall
	.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
96	dnegu v0 # error
97	sd v0, PT_R0(sp) # flag for syscall restarting
98	1: sd v0, PT_R2(sp) # result
99
100	o32_syscall_exit:
101	local_irq_disable # make need_resched and
102	# signals dont change between
103	# sampling and return
104	LONG_L a2, TI_FLAGS($28)
105	li t0, _TIF_ALLWORK_MASK
106	and t0, a2, t0
107	bnez t0, o32_syscall_exit_work
108
109	j restore_partial
110
111	o32_syscall_exit_work:
112	j syscall_exit_work_partial
113
114	/* ------------------------------------------------------------------------ */
115
116	trace_a_syscall:
117	SAVE_STATIC
118	sd a4, PT_R8(sp) # Save argument registers
119	sd a5, PT_R9(sp)
120	sd a6, PT_R10(sp)
121	sd a7, PT_R11(sp) # For indirect syscalls
122
123	move s0, t2 # Save syscall pointer
124	move a0, sp
125	li a1, 0
126	jal do_syscall_trace
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
	145	dnegu v0 # error
	146	sd v0, PT_R0(sp) # set flag for syscall restarting
	147	1: sd v0, PT_R2(sp) # result
	148
	149	j syscall_exit
	150
	151	/* ------------------------------------------------------------------------ */
	152
	153	/*
	154	* The stackpointer for a call with more than 4 arguments is bad.
	155	*/
	156	bad_stack:
	157	dnegu v0 # error
	158	sd v0, PT_R0(sp)
	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)
	177	sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
	178	beqz v0, einval
	179
	180	dsll v0, a0, 3
	181	ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)
	182
	183	li v1, 4000 # indirect syscall number
	184	beq a0, v1, einval # do not recurse
	185
	186	move a0, a1 # shift argument registers
	187	move a1, a2
	188	move a2, a3
	189	move a3, a4
	190	move a4, a5
	191	move a5, a6
	192	move a6, a7
	193	sd a0, PT_R4(sp) # ... and push back a0 - a3, some
	194	sd a1, PT_R5(sp) # syscalls expect them there
	195	sd a2, PT_R6(sp)
	196	sd a3, PT_R7(sp)
	197	sd a3, PT_R26(sp) # update a3 for syscall restarting
	198	jr t2
	199	/* Unreached */
	200
	201	einval: li v0, -EINVAL
	202	jr ra
203	END(sys32_syscall)
204
205	.align 3
206	.type sys_call_table,@object
207	sys_call_table:
208	PTR sys32_syscall /* 4000 */
209	PTR sys_exit
210	PTR sys_fork
211	PTR sys_read
212	PTR sys_write
7155262e	213	PTR compat_sys_open /* 4005 */
1da177e4 LT	214	PTR sys_close
	215	PTR sys_waitpid
	216	PTR sys_creat
	217	PTR sys_link
	218	PTR sys_unlink /* 4010 */
	219	PTR sys32_execve
	220	PTR sys_chdir
	221	PTR compat_sys_time
	222	PTR sys_mknod
	223	PTR sys_chmod /* 4015 */
	224	PTR sys_lchown
	225	PTR sys_ni_syscall
	226	PTR sys_ni_syscall /* was sys_stat */
	227	PTR sys_lseek
	228	PTR sys_getpid /* 4020 */
089c7e7f	229	PTR compat_sys_mount
1da177e4 LT	230	PTR sys_oldumount
	231	PTR sys_setuid
	232	PTR sys_getuid
	233	PTR compat_sys_stime /* 4025 */
	234	PTR sys32_ptrace
	235	PTR sys_alarm
	236	PTR sys_ni_syscall /* was sys_fstat */
	237	PTR sys_pause
	238	PTR compat_sys_utime /* 4030 */
	239	PTR sys_ni_syscall
	240	PTR sys_ni_syscall
	241	PTR sys_access
	242	PTR sys_nice
	243	PTR sys_ni_syscall /* 4035 */
	244	PTR sys_sync
	245	PTR sys_kill
	246	PTR sys_rename
	247	PTR sys_mkdir
	248	PTR sys_rmdir /* 4040 */
	249	PTR sys_dup
	250	PTR sys_pipe
	251	PTR compat_sys_times
	252	PTR sys_ni_syscall
	253	PTR sys_brk /* 4045 */
	254	PTR sys_setgid
	255	PTR sys_getgid
	256	PTR sys_ni_syscall /* was signal 2 */
	257	PTR sys_geteuid
	258	PTR sys_getegid /* 4050 */
	259	PTR sys_acct
	260	PTR sys_umount
	261	PTR sys_ni_syscall
	262	PTR compat_sys_ioctl
	263	PTR compat_sys_fcntl /* 4055 */
	264	PTR sys_ni_syscall
	265	PTR sys_setpgid
	266	PTR sys_ni_syscall
	267	PTR sys_olduname
	268	PTR sys_umask /* 4060 */
	269	PTR sys_chroot
	270	PTR sys32_ustat
	271	PTR sys_dup2
	272	PTR sys_getppid
	273	PTR sys_getpgrp /* 4065 */
	274	PTR sys_setsid
	275	PTR sys32_sigaction
	276	PTR sys_sgetmask
	277	PTR sys_ssetmask
	278	PTR sys_setreuid /* 4070 */
	279	PTR sys_setregid
	280	PTR sys32_sigsuspend
	281	PTR compat_sys_sigpending
	282	PTR sys_sethostname
	283	PTR compat_sys_setrlimit /* 4075 */
	284	PTR compat_sys_getrlimit
	285	PTR compat_sys_getrusage
	286	PTR sys32_gettimeofday
	287	PTR sys32_settimeofday
	288	PTR sys_getgroups /* 4080 */
	289	PTR sys_setgroups
	290	PTR sys_ni_syscall /* old_select */
	291	PTR sys_symlink
	292	PTR sys_ni_syscall /* was sys_lstat */
	293	PTR sys_readlink /* 4085 */
294	PTR sys_uselib
295	PTR sys_swapon
296	PTR sys_reboot
2fd628fe	297	PTR compat_sys_old_readdir
1da177e4 LT	298	PTR old_mmap /* 4090 */
	299	PTR sys_munmap
	300	PTR sys_truncate
	301	PTR sys_ftruncate
	302	PTR sys_fchmod
	303	PTR sys_fchown /* 4095 */
	304	PTR sys_getpriority
	305	PTR sys_setpriority
	306	PTR sys_ni_syscall
	307	PTR compat_sys_statfs
	308	PTR compat_sys_fstatfs /* 4100 */
	309	PTR sys_ni_syscall /* sys_ioperm */
	310	PTR sys32_socketcall
	311	PTR sys_syslog
	312	PTR compat_sys_setitimer
	313	PTR compat_sys_getitimer /* 4105 */
	314	PTR compat_sys_newstat
	315	PTR compat_sys_newlstat
	316	PTR compat_sys_newfstat
	317	PTR sys_uname
	318	PTR sys_ni_syscall /* sys_ioperm // 4110 */
	319	PTR sys_vhangup
	320	PTR sys_ni_syscall /* was sys_idle */
	321	PTR sys_ni_syscall /* sys_vm86 */
b6e203d8	322	PTR compat_sys_wait4
1da177e4 LT	323	PTR sys_swapoff /* 4115 */
	324	PTR sys32_sysinfo
	325	PTR sys32_ipc
	326	PTR sys_fsync
	327	PTR sys32_sigreturn
3c37026d	328	PTR sys32_clone /* 4120 */
1da177e4 LT	329	PTR sys_setdomainname
	330	PTR sys32_newuname
	331	PTR sys_ni_syscall /* sys_modify_ldt */
3158e941	332	PTR compat_sys_adjtimex
1da177e4 LT	333	PTR sys_mprotect /* 4125 */
	334	PTR compat_sys_sigprocmask
	335	PTR sys_ni_syscall /* was creat_module */
	336	PTR sys_init_module
	337	PTR sys_delete_module
	338	PTR sys_ni_syscall /* 4130, get_kernel_syms */
	339	PTR sys_quotactl
	340	PTR sys_getpgid
	341	PTR sys_fchdir
	342	PTR sys_bdflush
	343	PTR sys_sysfs /* 4135 */
	344	PTR sys32_personality
	345	PTR sys_ni_syscall /* for afs_syscall */
	346	PTR sys_setfsuid
	347	PTR sys_setfsgid
	348	PTR sys32_llseek /* 4140 */
2fd628fe	349	PTR compat_sys_getdents
1da177e4 LT	350	PTR compat_sys_select
	351	PTR sys_flock
	352	PTR sys_msync
	353	PTR compat_sys_readv /* 4145 */
	354	PTR compat_sys_writev
	355	PTR sys_cacheflush
	356	PTR sys_cachectl
	357	PTR sys_sysmips
	358	PTR sys_ni_syscall /* 4150 */
	359	PTR sys_getsid
	360	PTR sys_fdatasync
	361	PTR sys32_sysctl
	362	PTR sys_mlock
	363	PTR sys_munlock /* 4155 */
	364	PTR sys_mlockall
	365	PTR sys_munlockall
	366	PTR sys_sched_setparam
	367	PTR sys_sched_getparam
	368	PTR sys_sched_setscheduler /* 4160 */
	369	PTR sys_sched_getscheduler
	370	PTR sys_sched_yield
	371	PTR sys_sched_get_priority_max
	372	PTR sys_sched_get_priority_min
	373	PTR sys32_sched_rr_get_interval /* 4165 */
	374	PTR compat_sys_nanosleep
	375	PTR sys_mremap
	376	PTR sys_accept
	377	PTR sys_bind
	378	PTR sys_connect /* 4170 */
	379	PTR sys_getpeername
	380	PTR sys_getsockname
	381	PTR sys_getsockopt
	382	PTR sys_listen
	383	PTR sys_recv /* 4175 */
	384	PTR sys_recvfrom
	385	PTR compat_sys_recvmsg
	386	PTR sys_send
	387	PTR compat_sys_sendmsg
	388	PTR sys_sendto /* 4180 */
	389	PTR compat_sys_setsockopt
	390	PTR sys_shutdown
	391	PTR sys_socket
	392	PTR sys_socketpair
	393	PTR sys_setresuid /* 4185 */
	394	PTR sys_getresuid
	395	PTR sys_ni_syscall /* was query_module */
	396	PTR sys_poll
d547c5cc	397	PTR compat_sys_nfsservctl
1da177e4 LT	398	PTR sys_setresgid /* 4190 */
	399	PTR sys_getresgid
	400	PTR sys_prctl
	401	PTR sys32_rt_sigreturn
	402	PTR sys32_rt_sigaction
	403	PTR sys32_rt_sigprocmask /* 4195 */
	404	PTR sys32_rt_sigpending
	405	PTR compat_sys_rt_sigtimedwait
	406	PTR sys32_rt_sigqueueinfo
	407	PTR sys32_rt_sigsuspend
	408	PTR sys32_pread /* 4200 */
	409	PTR sys32_pwrite
	410	PTR sys_chown
	411	PTR sys_getcwd
	412	PTR sys_capget
	413	PTR sys_capset /* 4205 */
	414	PTR sys32_sigaltstack
	415	PTR sys32_sendfile
	416	PTR sys_ni_syscall
	417	PTR sys_ni_syscall
	418	PTR sys32_mmap2 /* 4210 */
	419	PTR sys32_truncate64
	420	PTR sys32_ftruncate64
	421	PTR sys_newstat
	422	PTR sys_newlstat
	423	PTR sys_newfstat /* 4215 */
	424	PTR sys_pivot_root
	425	PTR sys_mincore
	426	PTR sys_madvise
	427	PTR sys_getdents64
	428	PTR compat_sys_fcntl64 /* 4220 */
	429	PTR sys_ni_syscall
	430	PTR sys_gettid
	431	PTR sys32_readahead
	432	PTR sys_setxattr
	433	PTR sys_lsetxattr /* 4225 */
	434	PTR sys_fsetxattr
	435	PTR sys_getxattr
	436	PTR sys_lgetxattr
	437	PTR sys_fgetxattr
	438	PTR sys_listxattr /* 4230 */
	439	PTR sys_llistxattr
	440	PTR sys_flistxattr
	441	PTR sys_removexattr
	442	PTR sys_lremovexattr
	443	PTR sys_fremovexattr /* 4235 */
	444	PTR sys_tkill
	445	PTR sys_sendfile64
	446	PTR compat_sys_futex
	447	PTR compat_sys_sched_setaffinity
	448	PTR compat_sys_sched_getaffinity /* 4240 */
	449	PTR sys_io_setup
	450	PTR sys_io_destroy
	451	PTR sys_io_getevents
	452	PTR sys_io_submit
	453	PTR sys_io_cancel /* 4245 */
	454	PTR sys_exit_group
	455	PTR sys_lookup_dcookie
	456	PTR sys_epoll_create
	457	PTR sys_epoll_ctl
	458	PTR sys_epoll_wait /* 4250 */
	459	PTR sys_remap_file_pages
	460	PTR sys_set_tid_address
	461	PTR sys_restart_syscall
462	PTR sys_fadvise64_64
463	PTR compat_sys_statfs64 /* 4255 */
464	PTR compat_sys_fstatfs64
d1abb6a2	465	PTR sys32_timer_create
1da177e4 LT	466	PTR compat_sys_timer_settime
	467	PTR compat_sys_timer_gettime
	468	PTR sys_timer_getoverrun /* 4260 */
	469	PTR sys_timer_delete
	470	PTR compat_sys_clock_settime
	471	PTR compat_sys_clock_gettime
	472	PTR compat_sys_clock_getres
	473	PTR compat_sys_clock_nanosleep /* 4265 */
	474	PTR sys_tgkill
	475	PTR compat_sys_utimes
	476	PTR sys_ni_syscall /* sys_mbind */
	477	PTR sys_ni_syscall /* sys_get_mempolicy */
	478	PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
	479	PTR compat_sys_mq_open
	480	PTR sys_mq_unlink
	481	PTR compat_sys_mq_timedsend
	482	PTR compat_sys_mq_timedreceive
	483	PTR compat_sys_mq_notify /* 4275 */
	484	PTR compat_sys_mq_getsetattr
	485	PTR sys_ni_syscall /* sys_vserver */
54f2da75	486	PTR sys32_waitid
1da177e4 LT	487	PTR sys_ni_syscall /* available, was setaltroot */
	488	PTR sys_add_key /* 4280 */
	489	PTR sys_request_key
	490	PTR sys_keyctl
3c37026d	491	PTR sys_set_thread_area
7db36c85 RB	492	PTR sys_inotify_init
	493	PTR sys_inotify_add_watch /* 4285 */
	494	PTR sys_inotify_rm_watch
72bf8914 RB	495	PTR sys_migrate_pages
	496	PTR compat_sys_openat
	497	PTR sys_mkdirat
	498	PTR sys_mknodat /* 4290 */
	499	PTR sys_fchownat
	500	PTR compat_sys_futimesat
63415dbb	501	PTR sys_newfstatat
72bf8914 RB	502	PTR sys_unlinkat
	503	PTR sys_renameat /* 4295 */
	504	PTR sys_linkat
	505	PTR sys_symlinkat
	506	PTR sys_readlinkat
	507	PTR sys_fchmodat
	508	PTR sys_faccessat /* 4300 */
	509	PTR sys_pselect6
	510	PTR sys_ppoll
	511	PTR sys_unshare
f115da9c	512	PTR sys_splice
a8d587a7	513	PTR sys32_sync_file_range /* 4305 */
136d47d3	514	PTR sys_tee
722cfd90 RB	515	PTR sys_vmsplice
722cfd90 RB	516	PTR compat_sys_move_pages
7fdeb048 AN	517	PTR compat_sys_set_robust_list
7fdeb048 AN	518	PTR compat_sys_get_robust_list /* 4310 */
d2bcf87d	519	PTR sys_ni_syscall
1da177e4	520	.size sys_call_table,.-sys_call_table