[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/config.h>
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.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
	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	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	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	sys32_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	sys32_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	sys32_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	compat_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
	.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	*/
	16	#include <linux/config.h>
	17	#include <linux/errno.h>
	18	#include <asm/asm.h>
	19	#include <asm/asmmacro.h>
	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
	31	STI
	32	.set at
	33	ld t1, PT_EPC(sp) # skip syscall on return
	34
	35	dsubu t0, v0, __NR_O32_Linux # check syscall number
	36	sltiu t0, t0, __NR_O32_Linux_syscalls + 1
	37	daddiu t1, 4 # skip to next instruction
	38	sd t1, PT_EPC(sp)
	39	beqz t0, not_o32_scall
	40	#if 0
	41	SAVE_ALL
	42	move a1, v0
	43	PRINT("Scall %ld\n")
	44	RESTORE_ALL
	45	#endif
	46
	47	/* We don't want to stumble over broken sign extensions from
	48	userland. O32 does never use the upper half. */
	49	sll a0, a0, 0
	50	sll a1, a1, 0
	51	sll a2, a2, 0
	52	sll a3, a3, 0
	53
	54	dsll t0, v0, 3 # offset into table
	55	ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0)
	56
	57	sd a3, PT_R26(sp) # save a3 for syscall restarting
	58
	59	/*
	60	* More than four arguments. Try to deal with it by copying the
	61	* stack arguments from the user stack to the kernel stack.
	62	* This Sucks (TM).
	63	*
	64	* We intentionally keep the kernel stack a little below the top of
65	* userspace so we don't have to do a slower byte accurate check here.
66	*/
67	ld t0, PT_R29(sp) # get old user stack pointer
68	daddu t1, t0, 32
69	bltz t1, bad_stack
70
71	1: lw a4, 16(t0) # argument #5 from usp
72	2: lw a5, 20(t0) # argument #6 from usp
73	3: lw a6, 24(t0) # argument #7 from usp
74	4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls)
75
76	.section __ex_table,"a"
77	PTR 1b, bad_stack
78	PTR 2b, bad_stack
79	PTR 3b, bad_stack
80	PTR 4b, bad_stack
81	.previous
82
83	li t1, _TIF_SYSCALL_TRACE \| _TIF_SYSCALL_AUDIT
84	LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
85	and t0, t1, t0
86	bnez t0, trace_a_syscall
87
88	jalr t2 # Do The Real Thing (TM)
89
90	li t0, -EMAXERRNO - 1 # error?
91	sltu t0, t0, v0
92	sd t0, PT_R7(sp) # set error flag
93	beqz t0, 1f
94
95	dnegu v0 # error
96	sd v0, PT_R0(sp) # flag for syscall restarting
97	1: sd v0, PT_R2(sp) # result
98
99	o32_syscall_exit:
100	local_irq_disable # make need_resched and
101	# signals dont change between
102	# sampling and return
103	LONG_L a2, TI_FLAGS($28)
104	li t0, _TIF_ALLWORK_MASK
105	and t0, a2, t0
106	bnez t0, o32_syscall_exit_work
107
108	j restore_partial
109
110	o32_syscall_exit_work:
111	j syscall_exit_work_partial
112
113	/* ------------------------------------------------------------------------ */
114
115	trace_a_syscall:
116	SAVE_STATIC
117	sd a4, PT_R8(sp) # Save argument registers
118	sd a5, PT_R9(sp)
119	sd a6, PT_R10(sp)
120	sd a7, PT_R11(sp) # For indirect syscalls
121
122	move s0, t2 # Save syscall pointer
123	move a0, sp
124	li a1, 0
125	jal do_syscall_trace
126
04a7052c RB	127	move t0, s0
04a7052c RB	128	RESTORE_STATIC
1da177e4 LT	129	ld a0, PT_R4(sp) # Restore argument registers
	130	ld a1, PT_R5(sp)
	131	ld a2, PT_R6(sp)
	132	ld a3, PT_R7(sp)
	133	ld a4, PT_R8(sp)
	134	ld a5, PT_R9(sp)
	135	ld a6, PT_R10(sp)
	136	ld a7, PT_R11(sp) # For indirect syscalls
04a7052c	137	jalr t0
1da177e4 LT	138
	139	li t0, -EMAXERRNO - 1 # error?
	140	sltu t0, t0, v0
	141	sd t0, PT_R7(sp) # set error flag
	142	beqz t0, 1f
	143
	144	dnegu v0 # error
	145	sd v0, PT_R0(sp) # set flag for syscall restarting
	146	1: sd v0, PT_R2(sp) # result
	147
	148	j syscall_exit
	149
	150	/* ------------------------------------------------------------------------ */
	151
	152	/*
	153	* The stackpointer for a call with more than 4 arguments is bad.
	154	*/
	155	bad_stack:
	156	dnegu v0 # error
	157	sd v0, PT_R0(sp)
	158	sd v0, PT_R2(sp)
	159	li t0, 1 # set error flag
	160	sd t0, PT_R7(sp)
	161	j o32_syscall_exit
	162
	163	not_o32_scall:
	164	/*
	165	* This is not an o32 compatibility syscall, pass it on
	166	* to the 64-bit syscall handlers.
	167	*/
	168	#ifdef CONFIG_MIPS32_N32
	169	j handle_sysn32
	170	#else
	171	j handle_sys64
	172	#endif
	173	END(handle_sys)
	174
	175	LEAF(sys32_syscall)
	176	sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
	177	beqz v0, einval
	178
	179	dsll v0, a0, 3
	180	ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)
	181
	182	li v1, 4000 # indirect syscall number
	183	beq a0, v1, einval # do not recurse
	184
	185	move a0, a1 # shift argument registers
	186	move a1, a2
	187	move a2, a3
	188	move a3, a4
	189	move a4, a5
	190	move a5, a6
	191	move a6, a7
	192	sd a0, PT_R4(sp) # ... and push back a0 - a3, some
	193	sd a1, PT_R5(sp) # syscalls expect them there
	194	sd a2, PT_R6(sp)
	195	sd a3, PT_R7(sp)
	196	sd a3, PT_R26(sp) # update a3 for syscall restarting
	197	jr t2
	198	/* Unreached */
	199
	200	einval: li v0, -EINVAL
	201	jr ra
202	END(sys32_syscall)
203
204	.align 3
205	.type sys_call_table,@object
206	sys_call_table:
207	PTR sys32_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 sys32_execve
219	PTR sys_chdir
220	PTR compat_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 compat_sys_stime /* 4025 */
233	PTR sys32_ptrace
234	PTR sys_alarm
235	PTR sys_ni_syscall /* was sys_fstat */
236	PTR sys_pause
237	PTR compat_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 sys_pipe
250	PTR compat_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 compat_sys_ioctl
262	PTR compat_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 sys32_ustat
270	PTR sys_dup2
271	PTR sys_getppid
272	PTR sys_getpgrp /* 4065 */
273	PTR sys_setsid
274	PTR sys32_sigaction
275	PTR sys_sgetmask
276	PTR sys_ssetmask
277	PTR sys_setreuid /* 4070 */
278	PTR sys_setregid
279	PTR sys32_sigsuspend
280	PTR compat_sys_sigpending
281	PTR sys_sethostname
282	PTR compat_sys_setrlimit /* 4075 */
283	PTR compat_sys_getrlimit
284	PTR compat_sys_getrusage
285	PTR sys32_gettimeofday
286	PTR sys32_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 sys32_readdir
297	PTR old_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 compat_sys_statfs
307	PTR compat_sys_fstatfs /* 4100 */
308	PTR sys_ni_syscall /* sys_ioperm */
309	PTR sys32_socketcall
310	PTR sys_syslog
311	PTR compat_sys_setitimer
312	PTR compat_sys_getitimer /* 4105 */
313	PTR compat_sys_newstat
314	PTR compat_sys_newlstat
315	PTR compat_sys_newfstat
316	PTR sys_uname
317	PTR sys_ni_syscall /* sys_ioperm // 4110 */
318	PTR sys_vhangup
319	PTR sys_ni_syscall /* was sys_idle */
320	PTR sys_ni_syscall /* sys_vm86 */
b6e203d8	321	PTR compat_sys_wait4
1da177e4 LT	322	PTR sys_swapoff /* 4115 */
	323	PTR sys32_sysinfo
	324	PTR sys32_ipc
	325	PTR sys_fsync
	326	PTR sys32_sigreturn
3c37026d	327	PTR sys32_clone /* 4120 */
1da177e4 LT	328	PTR sys_setdomainname
	329	PTR sys32_newuname
	330	PTR sys_ni_syscall /* sys_modify_ldt */
	331	PTR sys32_adjtimex
	332	PTR sys_mprotect /* 4125 */
	333	PTR compat_sys_sigprocmask
	334	PTR sys_ni_syscall /* was creat_module */
	335	PTR sys_init_module
	336	PTR sys_delete_module
	337	PTR sys_ni_syscall /* 4130, 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 sys32_personality
	344	PTR sys_ni_syscall /* for afs_syscall */
	345	PTR sys_setfsuid
	346	PTR sys_setfsgid
	347	PTR sys32_llseek /* 4140 */
	348	PTR sys32_getdents
	349	PTR compat_sys_select
	350	PTR sys_flock
	351	PTR sys_msync
	352	PTR compat_sys_readv /* 4145 */
	353	PTR compat_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 sys32_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 sys32_sched_rr_get_interval /* 4165 */
	373	PTR compat_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 compat_sys_recvmsg
	385	PTR sys_send
	386	PTR compat_sys_sendmsg
	387	PTR sys_sendto /* 4180 */
	388	PTR compat_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 query_module */
395	PTR sys_poll
d547c5cc	396	PTR compat_sys_nfsservctl
1da177e4 LT	397	PTR sys_setresgid /* 4190 */
	398	PTR sys_getresgid
	399	PTR sys_prctl
	400	PTR sys32_rt_sigreturn
	401	PTR sys32_rt_sigaction
	402	PTR sys32_rt_sigprocmask /* 4195 */
	403	PTR sys32_rt_sigpending
	404	PTR compat_sys_rt_sigtimedwait
	405	PTR sys32_rt_sigqueueinfo
	406	PTR sys32_rt_sigsuspend
	407	PTR sys32_pread /* 4200 */
	408	PTR sys32_pwrite
	409	PTR sys_chown
	410	PTR sys_getcwd
	411	PTR sys_capget
	412	PTR sys_capset /* 4205 */
	413	PTR sys32_sigaltstack
	414	PTR sys32_sendfile
	415	PTR sys_ni_syscall
	416	PTR sys_ni_syscall
	417	PTR sys32_mmap2 /* 4210 */
	418	PTR sys32_truncate64
	419	PTR sys32_ftruncate64
	420	PTR sys_newstat
	421	PTR sys_newlstat
	422	PTR sys_newfstat /* 4215 */
	423	PTR sys_pivot_root
	424	PTR sys_mincore
	425	PTR sys_madvise
	426	PTR sys_getdents64
	427	PTR compat_sys_fcntl64 /* 4220 */
	428	PTR sys_ni_syscall
	429	PTR sys_gettid
	430	PTR sys32_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 compat_sys_futex
	446	PTR compat_sys_sched_setaffinity
	447	PTR compat_sys_sched_getaffinity /* 4240 */
	448	PTR sys_io_setup
	449	PTR sys_io_destroy
	450	PTR sys_io_getevents
	451	PTR sys_io_submit
	452	PTR sys_io_cancel /* 4245 */
	453	PTR sys_exit_group
	454	PTR sys_lookup_dcookie
	455	PTR sys_epoll_create
	456	PTR sys_epoll_ctl
	457	PTR sys_epoll_wait /* 4250 */
	458	PTR sys_remap_file_pages
	459	PTR sys_set_tid_address
	460	PTR sys_restart_syscall
461	PTR sys_fadvise64_64
462	PTR compat_sys_statfs64 /* 4255 */
463	PTR compat_sys_fstatfs64
d1abb6a2	464	PTR sys32_timer_create
1da177e4 LT	465	PTR compat_sys_timer_settime
	466	PTR compat_sys_timer_gettime
	467	PTR sys_timer_getoverrun /* 4260 */
	468	PTR sys_timer_delete
	469	PTR compat_sys_clock_settime
	470	PTR compat_sys_clock_gettime
	471	PTR compat_sys_clock_getres
	472	PTR compat_sys_clock_nanosleep /* 4265 */
	473	PTR sys_tgkill
	474	PTR compat_sys_utimes
	475	PTR sys_ni_syscall /* sys_mbind */
	476	PTR sys_ni_syscall /* sys_get_mempolicy */
	477	PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
	478	PTR compat_sys_mq_open
	479	PTR sys_mq_unlink
	480	PTR compat_sys_mq_timedsend
	481	PTR compat_sys_mq_timedreceive
	482	PTR compat_sys_mq_notify /* 4275 */
	483	PTR compat_sys_mq_getsetattr
	484	PTR sys_ni_syscall /* sys_vserver */
54f2da75	485	PTR sys32_waitid
1da177e4 LT	486	PTR sys_ni_syscall /* available, was setaltroot */
	487	PTR sys_add_key /* 4280 */
	488	PTR sys_request_key
	489	PTR sys_keyctl
3c37026d	490	PTR sys_set_thread_area
7db36c85 RB	491	PTR sys_inotify_init
	492	PTR sys_inotify_add_watch /* 4285 */
	493	PTR sys_inotify_rm_watch
72bf8914 RB	494	PTR sys_migrate_pages
	495	PTR compat_sys_openat
	496	PTR sys_mkdirat
	497	PTR sys_mknodat /* 4290 */
	498	PTR sys_fchownat
	499	PTR compat_sys_futimesat
	500	PTR compat_sys_newfstatat
	501	PTR sys_unlinkat
	502	PTR sys_renameat /* 4295 */
	503	PTR sys_linkat
	504	PTR sys_symlinkat
	505	PTR sys_readlinkat
	506	PTR sys_fchmodat
	507	PTR sys_faccessat /* 4300 */
	508	PTR sys_pselect6
	509	PTR sys_ppoll
	510	PTR sys_unshare
1da177e4	511	.size sys_call_table,.-sys_call_table