[linux.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:
	j	syscall_exit_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	compat_sys_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	compat_sys_truncate
	PTR	compat_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	compat_sys_ipc
	PTR	sys_fsync
	PTR	sys32_sigreturn
	PTR	__sys_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	compat_sys_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	compat_sys_rt_sigaction
	PTR	compat_sys_rt_sigprocmask	/* 4195 */
	PTR	compat_sys_rt_sigpending
	PTR	compat_sys_rt_sigtimedwait
	PTR	compat_sys_rt_sigqueueinfo
	PTR	compat_sys_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	compat_sys_sigaltstack
	PTR	compat_sys_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	compat_sys_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	compat_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	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	compat_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	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	compat_sys_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
	PTR	sys_kcmp
	PTR	sys_finit_module
	.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
70342287	13	* to ABI64 calling convention. 64-bit syscalls are also processed
1da177e4 LT	14	* here for now.
1da177e4 LT	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
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	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:
02f884ed	102	j syscall_exit_partial
1da177e4 LT	103
	104	/* ------------------------------------------------------------------------ */
	105
	106	trace_a_syscall:
	107	SAVE_STATIC
	108	sd a4, PT_R8(sp) # Save argument registers
	109	sd a5, PT_R9(sp)
	110	sd a6, PT_R10(sp)
	111	sd a7, PT_R11(sp) # For indirect syscalls
	112
	113	move s0, t2 # Save syscall pointer
	114	move a0, sp
8b659a39	115	jal syscall_trace_enter
1da177e4	116
04a7052c RB	117	move t0, s0
04a7052c RB	118	RESTORE_STATIC
1da177e4 LT	119	ld a0, PT_R4(sp) # Restore argument registers
	120	ld a1, PT_R5(sp)
	121	ld a2, PT_R6(sp)
	122	ld a3, PT_R7(sp)
	123	ld a4, PT_R8(sp)
	124	ld a5, PT_R9(sp)
	125	ld a6, PT_R10(sp)
	126	ld a7, PT_R11(sp) # For indirect syscalls
04a7052c	127	jalr t0
1da177e4 LT	128
	129	li t0, -EMAXERRNO - 1 # error?
	130	sltu t0, t0, v0
	131	sd t0, PT_R7(sp) # set error flag
	132	beqz t0, 1f
	133
8f5a00eb	134	ld t1, PT_R2(sp) # syscall number
1da177e4	135	dnegu v0 # error
8f5a00eb	136	sd t1, PT_R0(sp) # save it for syscall restarting
1da177e4 LT	137	1: sd v0, PT_R2(sp) # result
	138
	139	j syscall_exit
	140
	141	/* ------------------------------------------------------------------------ */
	142
	143	/*
	144	* The stackpointer for a call with more than 4 arguments is bad.
	145	*/
	146	bad_stack:
5b89c004	147	li v0, EFAULT
1da177e4 LT	148	sd v0, PT_R2(sp)
	149	li t0, 1 # set error flag
	150	sd t0, PT_R7(sp)
	151	j o32_syscall_exit
	152
	153	not_o32_scall:
	154	/*
	155	* This is not an o32 compatibility syscall, pass it on
	156	* to the 64-bit syscall handlers.
	157	*/
	158	#ifdef CONFIG_MIPS32_N32
	159	j handle_sysn32
	160	#else
	161	j handle_sys64
	162	#endif
	163	END(handle_sys)
	164
	165	LEAF(sys32_syscall)
e807f957 VM	166	subu t0, a0, __NR_O32_Linux # check syscall number
	167	sltiu v0, t0, __NR_O32_Linux_syscalls + 1
	168	beqz t0, einval # do not recurse
	169	dsll t1, t0, 3
1da177e4	170	beqz v0, einval
e807f957	171	ld t2, sys_call_table(t1) # syscall routine
1da177e4 LT	172
	173	move a0, a1 # shift argument registers
	174	move a1, a2
	175	move a2, a3
	176	move a3, a4
	177	move a4, a5
	178	move a5, a6
	179	move a6, a7
	180	sd a0, PT_R4(sp) # ... and push back a0 - a3, some
	181	sd a1, PT_R5(sp) # syscalls expect them there
	182	sd a2, PT_R6(sp)
	183	sd a3, PT_R7(sp)
	184	sd a3, PT_R26(sp) # update a3 for syscall restarting
	185	jr t2
	186	/* Unreached */
	187
70342287	188	einval: li v0, -ENOSYS
1da177e4 LT	189	jr ra
	190	END(sys32_syscall)
	191
	192	.align 3
	193	.type sys_call_table,@object
	194	sys_call_table:
	195	PTR sys32_syscall /* 4000 */
	196	PTR sys_exit
50150d2b	197	PTR __sys_fork
1da177e4 LT	198	PTR sys_read
1da177e4 LT	199	PTR sys_write
7155262e	200	PTR compat_sys_open /* 4005 */
1da177e4 LT	201	PTR sys_close
	202	PTR sys_waitpid
	203	PTR sys_creat
	204	PTR sys_link
	205	PTR sys_unlink /* 4010 */
baf9ff74	206	PTR compat_sys_execve
1da177e4 LT	207	PTR sys_chdir
	208	PTR compat_sys_time
	209	PTR sys_mknod
	210	PTR sys_chmod /* 4015 */
	211	PTR sys_lchown
	212	PTR sys_ni_syscall
	213	PTR sys_ni_syscall /* was sys_stat */
	214	PTR sys_lseek
	215	PTR sys_getpid /* 4020 */
089c7e7f	216	PTR compat_sys_mount
1da177e4 LT	217	PTR sys_oldumount
	218	PTR sys_setuid
	219	PTR sys_getuid
	220	PTR compat_sys_stime /* 4025 */
5d9a76cd	221	PTR compat_sys_ptrace
1da177e4 LT	222	PTR sys_alarm
	223	PTR sys_ni_syscall /* was sys_fstat */
	224	PTR sys_pause
	225	PTR compat_sys_utime /* 4030 */
	226	PTR sys_ni_syscall
	227	PTR sys_ni_syscall
	228	PTR sys_access
	229	PTR sys_nice
	230	PTR sys_ni_syscall /* 4035 */
	231	PTR sys_sync
	232	PTR sys_kill
	233	PTR sys_rename
	234	PTR sys_mkdir
	235	PTR sys_rmdir /* 4040 */
	236	PTR sys_dup
8213bbf9	237	PTR sysm_pipe
1da177e4 LT	238	PTR compat_sys_times
	239	PTR sys_ni_syscall
	240	PTR sys_brk /* 4045 */
	241	PTR sys_setgid
	242	PTR sys_getgid
	243	PTR sys_ni_syscall /* was signal 2 */
	244	PTR sys_geteuid
	245	PTR sys_getegid /* 4050 */
	246	PTR sys_acct
	247	PTR sys_umount
	248	PTR sys_ni_syscall
	249	PTR compat_sys_ioctl
	250	PTR compat_sys_fcntl /* 4055 */
	251	PTR sys_ni_syscall
	252	PTR sys_setpgid
	253	PTR sys_ni_syscall
	254	PTR sys_olduname
	255	PTR sys_umask /* 4060 */
	256	PTR sys_chroot
2b1c6bd7	257	PTR compat_sys_ustat
1da177e4 LT	258	PTR sys_dup2
	259	PTR sys_getppid
	260	PTR sys_getpgrp /* 4065 */
	261	PTR sys_setsid
dbda6ac0	262	PTR sys_32_sigaction
1da177e4 LT	263	PTR sys_sgetmask
	264	PTR sys_ssetmask
	265	PTR sys_setreuid /* 4070 */
	266	PTR sys_setregid
	267	PTR sys32_sigsuspend
	268	PTR compat_sys_sigpending
	269	PTR sys_sethostname
	270	PTR compat_sys_setrlimit /* 4075 */
	271	PTR compat_sys_getrlimit
	272	PTR compat_sys_getrusage
b418da16 CH	273	PTR compat_sys_gettimeofday
b418da16 CH	274	PTR compat_sys_settimeofday
1da177e4 LT	275	PTR sys_getgroups /* 4080 */
	276	PTR sys_setgroups
	277	PTR sys_ni_syscall /* old_select */
	278	PTR sys_symlink
	279	PTR sys_ni_syscall /* was sys_lstat */
	280	PTR sys_readlink /* 4085 */
	281	PTR sys_uselib
	282	PTR sys_swapon
	283	PTR sys_reboot
2fd628fe	284	PTR compat_sys_old_readdir
dbda6ac0	285	PTR sys_mips_mmap /* 4090 */
1da177e4	286	PTR sys_munmap
3f6d078d AV	287	PTR compat_sys_truncate
3f6d078d AV	288	PTR compat_sys_ftruncate
1da177e4 LT	289	PTR sys_fchmod
	290	PTR sys_fchown /* 4095 */
	291	PTR sys_getpriority
	292	PTR sys_setpriority
	293	PTR sys_ni_syscall
	294	PTR compat_sys_statfs
	295	PTR compat_sys_fstatfs /* 4100 */
	296	PTR sys_ni_syscall /* sys_ioperm */
08274cef	297	PTR compat_sys_socketcall
1da177e4 LT	298	PTR sys_syslog
	299	PTR compat_sys_setitimer
	300	PTR compat_sys_getitimer /* 4105 */
	301	PTR compat_sys_newstat
	302	PTR compat_sys_newlstat
	303	PTR compat_sys_newfstat
	304	PTR sys_uname
	305	PTR sys_ni_syscall /* sys_ioperm // 4110 */
	306	PTR sys_vhangup
	307	PTR sys_ni_syscall /* was sys_idle */
	308	PTR sys_ni_syscall /* sys_vm86 */
b6e203d8	309	PTR compat_sys_wait4
1da177e4	310	PTR sys_swapoff /* 4115 */
d4d23add	311	PTR compat_sys_sysinfo
56e41d3c	312	PTR compat_sys_ipc
1da177e4 LT	313	PTR sys_fsync
1da177e4 LT	314	PTR sys32_sigreturn
50150d2b	315	PTR __sys_clone /* 4120 */
1da177e4	316	PTR sys_setdomainname
e28cbf22	317	PTR sys_newuname
1da177e4	318	PTR sys_ni_syscall /* sys_modify_ldt */
3158e941	319	PTR compat_sys_adjtimex
1da177e4 LT	320	PTR sys_mprotect /* 4125 */
	321	PTR compat_sys_sigprocmask
	322	PTR sys_ni_syscall /* was creat_module */
	323	PTR sys_init_module
	324	PTR sys_delete_module
	325	PTR sys_ni_syscall /* 4130, get_kernel_syms */
	326	PTR sys_quotactl
	327	PTR sys_getpgid
	328	PTR sys_fchdir
	329	PTR sys_bdflush
	330	PTR sys_sysfs /* 4135 */
dbda6ac0	331	PTR sys_32_personality
70342287	332	PTR sys_ni_syscall /* for afs_syscall */
1da177e4 LT	333	PTR sys_setfsuid
1da177e4 LT	334	PTR sys_setfsgid
dbda6ac0	335	PTR sys_32_llseek /* 4140 */
2fd628fe	336	PTR compat_sys_getdents
1da177e4 LT	337	PTR compat_sys_select
	338	PTR sys_flock
	339	PTR sys_msync
	340	PTR compat_sys_readv /* 4145 */
	341	PTR compat_sys_writev
	342	PTR sys_cacheflush
	343	PTR sys_cachectl
	344	PTR sys_sysmips
	345	PTR sys_ni_syscall /* 4150 */
	346	PTR sys_getsid
	347	PTR sys_fdatasync
aff639cd	348	PTR compat_sys_sysctl
1da177e4 LT	349	PTR sys_mlock
	350	PTR sys_munlock /* 4155 */
	351	PTR sys_mlockall
	352	PTR sys_munlockall
	353	PTR sys_sched_setparam
	354	PTR sys_sched_getparam
70342287	355	PTR sys_sched_setscheduler /* 4160 */
1da177e4 LT	356	PTR sys_sched_getscheduler
	357	PTR sys_sched_yield
	358	PTR sys_sched_get_priority_max
	359	PTR sys_sched_get_priority_min
aebb2afd	360	PTR compat_sys_sched_rr_get_interval /* 4165 */
1da177e4 LT	361	PTR compat_sys_nanosleep
	362	PTR sys_mremap
	363	PTR sys_accept
	364	PTR sys_bind
	365	PTR sys_connect /* 4170 */
	366	PTR sys_getpeername
	367	PTR sys_getsockname
	368	PTR sys_getsockopt
	369	PTR sys_listen
1dacc76d JB	370	PTR compat_sys_recv /* 4175 */
1dacc76d JB	371	PTR compat_sys_recvfrom
1da177e4 LT	372	PTR compat_sys_recvmsg
	373	PTR sys_send
	374	PTR compat_sys_sendmsg
	375	PTR sys_sendto /* 4180 */
	376	PTR compat_sys_setsockopt
	377	PTR sys_shutdown
	378	PTR sys_socket
	379	PTR sys_socketpair
	380	PTR sys_setresuid /* 4185 */
	381	PTR sys_getresuid
	382	PTR sys_ni_syscall /* was query_module */
	383	PTR sys_poll
f5b94099	384	PTR sys_ni_syscall /* was nfsservctl */
1da177e4 LT	385	PTR sys_setresgid /* 4190 */
	386	PTR sys_getresgid
	387	PTR sys_prctl
	388	PTR sys32_rt_sigreturn
aa584802	389	PTR compat_sys_rt_sigaction
aebb2afd	390	PTR compat_sys_rt_sigprocmask /* 4195 */
45cb66f7	391	PTR compat_sys_rt_sigpending
1da177e4	392	PTR compat_sys_rt_sigtimedwait
ea5d83db	393	PTR compat_sys_rt_sigqueueinfo
bde208d2	394	PTR compat_sys_rt_sigsuspend
dbda6ac0 RB	395	PTR sys_32_pread /* 4200 */
dbda6ac0 RB	396	PTR sys_32_pwrite
1da177e4 LT	397	PTR sys_chown
	398	PTR sys_getcwd
	399	PTR sys_capget
	400	PTR sys_capset /* 4205 */
ea536ad4	401	PTR compat_sys_sigaltstack
19f4fc3a	402	PTR compat_sys_sendfile
1da177e4 LT	403	PTR sys_ni_syscall
1da177e4 LT	404	PTR sys_ni_syscall
dbda6ac0 RB	405	PTR sys_mips_mmap2 /* 4210 */
	406	PTR sys_32_truncate64
	407	PTR sys_32_ftruncate64
1da177e4 LT	408	PTR sys_newstat
	409	PTR sys_newlstat
	410	PTR sys_newfstat /* 4215 */
	411	PTR sys_pivot_root
	412	PTR sys_mincore
	413	PTR sys_madvise
	414	PTR sys_getdents64
	415	PTR compat_sys_fcntl64 /* 4220 */
	416	PTR sys_ni_syscall
	417	PTR sys_gettid
	418	PTR sys32_readahead
	419	PTR sys_setxattr
	420	PTR sys_lsetxattr /* 4225 */
	421	PTR sys_fsetxattr
	422	PTR sys_getxattr
	423	PTR sys_lgetxattr
	424	PTR sys_fgetxattr
	425	PTR sys_listxattr /* 4230 */
	426	PTR sys_llistxattr
	427	PTR sys_flistxattr
	428	PTR sys_removexattr
	429	PTR sys_lremovexattr
	430	PTR sys_fremovexattr /* 4235 */
	431	PTR sys_tkill
	432	PTR sys_sendfile64
5e392b8d	433	PTR compat_sys_futex
1da177e4 LT	434	PTR compat_sys_sched_setaffinity
1da177e4 LT	435	PTR compat_sys_sched_getaffinity /* 4240 */
e2cc502c	436	PTR compat_sys_io_setup
1da177e4	437	PTR sys_io_destroy
e2cc502c MT	438	PTR compat_sys_io_getevents
e2cc502c MT	439	PTR compat_sys_io_submit
1da177e4 LT	440	PTR sys_io_cancel /* 4245 */
1da177e4 LT	441	PTR sys_exit_group
d5dc77bf	442	PTR compat_sys_lookup_dcookie
1da177e4 LT	443	PTR sys_epoll_create
	444	PTR sys_epoll_ctl
	445	PTR sys_epoll_wait /* 4250 */
	446	PTR sys_remap_file_pages
	447	PTR sys_set_tid_address
	448	PTR sys_restart_syscall
8676d2e0	449	PTR sys32_fadvise64_64
1da177e4 LT	450	PTR compat_sys_statfs64 /* 4255 */
1da177e4 LT	451	PTR compat_sys_fstatfs64
821d313c	452	PTR compat_sys_timer_create
1da177e4 LT	453	PTR compat_sys_timer_settime
	454	PTR compat_sys_timer_gettime
	455	PTR sys_timer_getoverrun /* 4260 */
	456	PTR sys_timer_delete
	457	PTR compat_sys_clock_settime
	458	PTR compat_sys_clock_gettime
	459	PTR compat_sys_clock_getres
	460	PTR compat_sys_clock_nanosleep /* 4265 */
	461	PTR sys_tgkill
	462	PTR compat_sys_utimes
	463	PTR sys_ni_syscall /* sys_mbind */
	464	PTR sys_ni_syscall /* sys_get_mempolicy */
	465	PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
	466	PTR compat_sys_mq_open
	467	PTR sys_mq_unlink
	468	PTR compat_sys_mq_timedsend
	469	PTR compat_sys_mq_timedreceive
	470	PTR compat_sys_mq_notify /* 4275 */
	471	PTR compat_sys_mq_getsetattr
	472	PTR sys_ni_syscall /* sys_vserver */
1c37ea82	473	PTR compat_sys_waitid
1da177e4 LT	474	PTR sys_ni_syscall /* available, was setaltroot */
	475	PTR sys_add_key /* 4280 */
	476	PTR sys_request_key
	477	PTR sys_keyctl
3c37026d	478	PTR sys_set_thread_area
7db36c85 RB	479	PTR sys_inotify_init
	480	PTR sys_inotify_add_watch /* 4285 */
	481	PTR sys_inotify_rm_watch
72bf8914 RB	482	PTR sys_migrate_pages
	483	PTR compat_sys_openat
	484	PTR sys_mkdirat
	485	PTR sys_mknodat /* 4290 */
	486	PTR sys_fchownat
	487	PTR compat_sys_futimesat
63415dbb	488	PTR sys_newfstatat
72bf8914 RB	489	PTR sys_unlinkat
	490	PTR sys_renameat /* 4295 */
	491	PTR sys_linkat
	492	PTR sys_symlinkat
	493	PTR sys_readlinkat
	494	PTR sys_fchmodat
	495	PTR sys_faccessat /* 4300 */
99d233fa	496	PTR compat_sys_pselect6
049a31af	497	PTR compat_sys_ppoll
72bf8914	498	PTR sys_unshare
f115da9c	499	PTR sys_splice
a8d587a7	500	PTR sys32_sync_file_range /* 4305 */
136d47d3	501	PTR sys_tee
8d13cb26	502	PTR compat_sys_vmsplice
722cfd90	503	PTR compat_sys_move_pages
7fdeb048 AN	504	PTR compat_sys_set_robust_list
7fdeb048 AN	505	PTR compat_sys_get_robust_list /* 4310 */
583bb86f	506	PTR compat_sys_kexec_load
991ea26d	507	PTR sys_getcpu
e016c38d	508	PTR compat_sys_epoll_pwait
08253b39 RB	509	PTR sys_ioprio_set
08253b39 RB	510	PTR sys_ioprio_get /* 4315 */
7a6d4f38 AN	511	PTR compat_sys_utimensat
7a6d4f38 AN	512	PTR compat_sys_signalfd
8bdd5142	513	PTR sys_ni_syscall /* was timerfd */
7a6d4f38	514	PTR sys_eventfd
422efb17	515	PTR sys32_fallocate /* 4320 */
6783fe62	516	PTR sys_timerfd_create
c7d16736 DD	517	PTR compat_sys_timerfd_gettime
c7d16736 DD	518	PTR compat_sys_timerfd_settime
3885b71b RB	519	PTR compat_sys_signalfd4
	520	PTR sys_eventfd2 /* 4325 */
	521	PTR sys_epoll_create1
	522	PTR sys_dup3
	523	PTR sys_pipe2
	524	PTR sys_inotify_init1
ddd9e91b RB	525	PTR compat_sys_preadv /* 4330 */
ddd9e91b RB	526	PTR compat_sys_pwritev
69f16c9a	527	PTR compat_sys_rt_tgsigqueueinfo
cdd6c482	528	PTR sys_perf_event_open
54822de7	529	PTR sys_accept4
5e844b31 DD	530	PTR compat_sys_recvmmsg /* 4335 */
5e844b31 DD	531	PTR sys_fanotify_init
91c2e0bc	532	PTR compat_sys_fanotify_mark
5e844b31	533	PTR sys_prlimit64
84ed9432 DD	534	PTR sys_name_to_handle_at
	535	PTR compat_sys_open_by_handle_at /* 4340 */
	536	PTR compat_sys_clock_adjtime
1bbf2875	537	PTR sys_syncfs
b12acf16	538	PTR compat_sys_sendmmsg
7b21fddd	539	PTR sys_setns
8ff8584e DD	540	PTR compat_sys_process_vm_readv /* 4345 */
8ff8584e DD	541	PTR compat_sys_process_vm_writev
ce71d24c	542	PTR sys_kcmp
6295150b	543	PTR sys_finit_module
1da177e4	544	.size sys_call_table,.-sys_call_table