[deliverable/linux.git] / arch / mips / kernel / scall32-o32.S

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1995-99, 2000- 02, 06 Ralf Baechle <ralf@linux-mips.org>
 * Copyright (C) 2001 MIPS Technologies, Inc.
 * Copyright (C) 2004 Thiemo Seufer
 * Copyright (C) 2014 Imagination Technologies Ltd.
 */
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/isadep.h>
#include <asm/sysmips.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>
#include <asm/war.h>
#include <asm/asm-offsets.h>

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

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

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

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

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

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

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

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

	/*
	 * Ok, copy the args from the luser stack to the kernel stack.
	 */

	.set    push
	.set    noreorder
	.set	nomacro

load_a4: user_lw(t5, 16(t0))		# argument #5 from usp
load_a5: user_lw(t6, 20(t0))		# argument #6 from usp
load_a6: user_lw(t7, 24(t0))		# argument #7 from usp
load_a7: user_lw(t8, 28(t0))		# argument #8 from usp
loads_done:

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

	.section __ex_table,"a"
	PTR	load_a4, bad_stack_a4
	PTR	load_a5, bad_stack_a5
	PTR	load_a6, bad_stack_a6
	PTR	load_a7, bad_stack_a7
	.previous

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

	jalr	t2			# Do The Real Thing (TM)

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

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

o32_syscall_exit:
	j	syscall_exit_partial

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

syscall_trace_entry:
	SAVE_STATIC
	move	s0, t2
	move	a0, sp

	/*
	 * syscall number is in v0 unless we called syscall(__NR_###)
	 * where the real syscall number is in a0
	 */
	addiu	a1, v0,  __NR_O32_Linux
	bnez	v0, 1f /* __NR_syscall at offset 0 */
	lw	a1, PT_R4(sp)

1:	jal	syscall_trace_enter

	bltz	v0, 2f			# seccomp failed? Skip syscall

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

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

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

2:	j	syscall_exit

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

	/*
	 * Our open-coded access area sanity test for the stack pointer
	 * failed. We probably should handle this case a bit more drastic.
	 */
bad_stack:
	li	v0, EFAULT
	sw	v0, PT_R2(sp)
	li	t0, 1				# set error flag
	sw	t0, PT_R7(sp)
	j	o32_syscall_exit

bad_stack_a4:
	li	t5, 0
	b	load_a5

bad_stack_a5:
	li	t6, 0
	b	load_a6

bad_stack_a6:
	li	t7, 0
	b	load_a7

bad_stack_a7:
	li	t8, 0
	b	loads_done

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

	LEAF(sys_syscall)
	subu	t0, a0, __NR_O32_Linux	# check syscall number
	sltiu	v0, t0, __NR_O32_Linux_syscalls + 1
	beqz	t0, einval		# do not recurse
	sll	t1, t0, 2
	beqz	v0, einval
	lw	t2, sys_call_table(t1)		# syscall routine
	sw	a0, PT_R2(sp)			# call routine directly on restart

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

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

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

	.align	2
	.type	sys_call_table, @object
EXPORT(sys_call_table)
	PTR	sys_syscall			/* 4000 */
	PTR	sys_exit
	PTR	__sys_fork
	PTR	sys_read
	PTR	sys_write
	PTR	sys_open			/* 4005 */
	PTR	sys_close
	PTR	sys_waitpid
	PTR	sys_creat
	PTR	sys_link
	PTR	sys_unlink			/* 4010 */
	PTR	sys_execve
	PTR	sys_chdir
	PTR	sys_time
	PTR	sys_mknod
	PTR	sys_chmod			/* 4015 */
	PTR	sys_lchown
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall			/* was sys_stat */
	PTR	sys_lseek
	PTR	sys_getpid			/* 4020 */
	PTR	sys_mount
	PTR	sys_oldumount
	PTR	sys_setuid
	PTR	sys_getuid
	PTR	sys_stime			/* 4025 */
	PTR	sys_ptrace
	PTR	sys_alarm
	PTR	sys_ni_syscall			/* was sys_fstat */
	PTR	sys_pause
	PTR	sys_utime			/* 4030 */
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall
	PTR	sys_access
	PTR	sys_nice
	PTR	sys_ni_syscall			/* 4035 */
	PTR	sys_sync
	PTR	sys_kill
	PTR	sys_rename
	PTR	sys_mkdir
	PTR	sys_rmdir			/* 4040 */
	PTR	sys_dup
	PTR	sysm_pipe
	PTR	sys_times
	PTR	sys_ni_syscall
	PTR	sys_brk				/* 4045 */
	PTR	sys_setgid
	PTR	sys_getgid
	PTR	sys_ni_syscall			/* was signal(2) */
	PTR	sys_geteuid
	PTR	sys_getegid			/* 4050 */
	PTR	sys_acct
	PTR	sys_umount
	PTR	sys_ni_syscall
	PTR	sys_ioctl
	PTR	sys_fcntl			/* 4055 */
	PTR	sys_ni_syscall
	PTR	sys_setpgid
	PTR	sys_ni_syscall
	PTR	sys_olduname
	PTR	sys_umask			/* 4060 */
	PTR	sys_chroot
	PTR	sys_ustat
	PTR	sys_dup2
	PTR	sys_getppid
	PTR	sys_getpgrp			/* 4065 */
	PTR	sys_setsid
	PTR	sys_sigaction
	PTR	sys_sgetmask
	PTR	sys_ssetmask
	PTR	sys_setreuid			/* 4070 */
	PTR	sys_setregid
	PTR	sys_sigsuspend
	PTR	sys_sigpending
	PTR	sys_sethostname
	PTR	sys_setrlimit			/* 4075 */
	PTR	sys_getrlimit
	PTR	sys_getrusage
	PTR	sys_gettimeofday
	PTR	sys_settimeofday
	PTR	sys_getgroups			/* 4080 */
	PTR	sys_setgroups
	PTR	sys_ni_syscall			/* old_select */
	PTR	sys_symlink
	PTR	sys_ni_syscall			/* was sys_lstat */
	PTR	sys_readlink			/* 4085 */
	PTR	sys_uselib
	PTR	sys_swapon
	PTR	sys_reboot
	PTR	sys_old_readdir
	PTR	sys_mips_mmap			/* 4090 */
	PTR	sys_munmap
	PTR	sys_truncate
	PTR	sys_ftruncate
	PTR	sys_fchmod
	PTR	sys_fchown			/* 4095 */
	PTR	sys_getpriority
	PTR	sys_setpriority
	PTR	sys_ni_syscall
	PTR	sys_statfs
	PTR	sys_fstatfs			/* 4100 */
	PTR	sys_ni_syscall			/* was ioperm(2) */
	PTR	sys_socketcall
	PTR	sys_syslog
	PTR	sys_setitimer
	PTR	sys_getitimer			/* 4105 */
	PTR	sys_newstat
	PTR	sys_newlstat
	PTR	sys_newfstat
	PTR	sys_uname
	PTR	sys_ni_syscall			/* 4110 was iopl(2) */
	PTR	sys_vhangup
	PTR	sys_ni_syscall			/* was sys_idle() */
	PTR	sys_ni_syscall			/* was sys_vm86 */
	PTR	sys_wait4
	PTR	sys_swapoff			/* 4115 */
	PTR	sys_sysinfo
	PTR	sys_ipc
	PTR	sys_fsync
	PTR	sys_sigreturn
	PTR	__sys_clone			/* 4120 */
	PTR	sys_setdomainname
	PTR	sys_newuname
	PTR	sys_ni_syscall			/* sys_modify_ldt */
	PTR	sys_adjtimex
	PTR	sys_mprotect			/* 4125 */
	PTR	sys_sigprocmask
	PTR	sys_ni_syscall			/* was create_module */
	PTR	sys_init_module
	PTR	sys_delete_module
	PTR	sys_ni_syscall			/* 4130 was get_kernel_syms */
	PTR	sys_quotactl
	PTR	sys_getpgid
	PTR	sys_fchdir
	PTR	sys_bdflush
	PTR	sys_sysfs			/* 4135 */
	PTR	sys_personality
	PTR	sys_ni_syscall			/* for afs_syscall */
	PTR	sys_setfsuid
	PTR	sys_setfsgid
	PTR	sys_llseek			/* 4140 */
	PTR	sys_getdents
	PTR	sys_select
	PTR	sys_flock
	PTR	sys_msync
	PTR	sys_readv			/* 4145 */
	PTR	sys_writev
	PTR	sys_cacheflush
	PTR	sys_cachectl
	PTR	sys_sysmips
	PTR	sys_ni_syscall			/* 4150 */
	PTR	sys_getsid
	PTR	sys_fdatasync
	PTR	sys_sysctl
	PTR	sys_mlock
	PTR	sys_munlock			/* 4155 */
	PTR	sys_mlockall
	PTR	sys_munlockall
	PTR	sys_sched_setparam
	PTR	sys_sched_getparam
	PTR	sys_sched_setscheduler		/* 4160 */
	PTR	sys_sched_getscheduler
	PTR	sys_sched_yield
	PTR	sys_sched_get_priority_max
	PTR	sys_sched_get_priority_min
	PTR	sys_sched_rr_get_interval	/* 4165 */
	PTR	sys_nanosleep
	PTR	sys_mremap
	PTR	sys_accept
	PTR	sys_bind
	PTR	sys_connect			/* 4170 */
	PTR	sys_getpeername
	PTR	sys_getsockname
	PTR	sys_getsockopt
	PTR	sys_listen
	PTR	sys_recv			/* 4175 */
	PTR	sys_recvfrom
	PTR	sys_recvmsg
	PTR	sys_send
	PTR	sys_sendmsg
	PTR	sys_sendto			/* 4180 */
	PTR	sys_setsockopt
	PTR	sys_shutdown
	PTR	sys_socket
	PTR	sys_socketpair
	PTR	sys_setresuid			/* 4185 */
	PTR	sys_getresuid
	PTR	sys_ni_syscall			/* was sys_query_module */
	PTR	sys_poll
	PTR	sys_ni_syscall			/* was nfsservctl */
	PTR	sys_setresgid			/* 4190 */
	PTR	sys_getresgid
	PTR	sys_prctl
	PTR	sys_rt_sigreturn
	PTR	sys_rt_sigaction
	PTR	sys_rt_sigprocmask		/* 4195 */
	PTR	sys_rt_sigpending
	PTR	sys_rt_sigtimedwait
	PTR	sys_rt_sigqueueinfo
	PTR	sys_rt_sigsuspend
	PTR	sys_pread64			/* 4200 */
	PTR	sys_pwrite64
	PTR	sys_chown
	PTR	sys_getcwd
	PTR	sys_capget
	PTR	sys_capset			/* 4205 */
	PTR	sys_sigaltstack
	PTR	sys_sendfile
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall
	PTR	sys_mips_mmap2			/* 4210 */
	PTR	sys_truncate64
	PTR	sys_ftruncate64
	PTR	sys_stat64
	PTR	sys_lstat64
	PTR	sys_fstat64			/* 4215 */
	PTR	sys_pivot_root
	PTR	sys_mincore
	PTR	sys_madvise
	PTR	sys_getdents64
	PTR	sys_fcntl64			/* 4220 */
	PTR	sys_ni_syscall
	PTR	sys_gettid
	PTR	sys_readahead
	PTR	sys_setxattr
	PTR	sys_lsetxattr			/* 4225 */
	PTR	sys_fsetxattr
	PTR	sys_getxattr
	PTR	sys_lgetxattr
	PTR	sys_fgetxattr
	PTR	sys_listxattr			/* 4230 */
	PTR	sys_llistxattr
	PTR	sys_flistxattr
	PTR	sys_removexattr
	PTR	sys_lremovexattr
	PTR	sys_fremovexattr		/* 4235 */
	PTR	sys_tkill
	PTR	sys_sendfile64
	PTR	sys_futex
#ifdef CONFIG_MIPS_MT_FPAFF
	/*
	 * For FPU affinity scheduling on MIPS MT processors, we need to
	 * intercept sys_sched_xxxaffinity() calls until we get a proper hook
	 * in kernel/sched/core.c.  Considered only temporary we only support
	 * these hooks for the 32-bit kernel - there is no MIPS64 MT processor
	 * atm.
	 */
	PTR	mipsmt_sys_sched_setaffinity
	PTR	mipsmt_sys_sched_getaffinity
#else
	PTR	sys_sched_setaffinity
	PTR	sys_sched_getaffinity		/* 4240 */
#endif /* CONFIG_MIPS_MT_FPAFF */
	PTR	sys_io_setup
	PTR	sys_io_destroy
	PTR	sys_io_getevents
	PTR	sys_io_submit
	PTR	sys_io_cancel			/* 4245 */
	PTR	sys_exit_group
	PTR	sys_lookup_dcookie
	PTR	sys_epoll_create
	PTR	sys_epoll_ctl
	PTR	sys_epoll_wait			/* 4250 */
	PTR	sys_remap_file_pages
	PTR	sys_set_tid_address
	PTR	sys_restart_syscall
	PTR	sys_fadvise64_64
	PTR	sys_statfs64			/* 4255 */
	PTR	sys_fstatfs64
	PTR	sys_timer_create
	PTR	sys_timer_settime
	PTR	sys_timer_gettime
	PTR	sys_timer_getoverrun		/* 4260 */
	PTR	sys_timer_delete
	PTR	sys_clock_settime
	PTR	sys_clock_gettime
	PTR	sys_clock_getres
	PTR	sys_clock_nanosleep		/* 4265 */
	PTR	sys_tgkill
	PTR	sys_utimes
	PTR	sys_mbind
	PTR	sys_get_mempolicy
	PTR	sys_set_mempolicy		/* 4270 */
	PTR	sys_mq_open
	PTR	sys_mq_unlink
	PTR	sys_mq_timedsend
	PTR	sys_mq_timedreceive
	PTR	sys_mq_notify			/* 4275 */
	PTR	sys_mq_getsetattr
	PTR	sys_ni_syscall			/* sys_vserver */
	PTR	sys_waitid
	PTR	sys_ni_syscall			/* available, was setaltroot */
	PTR	sys_add_key			/* 4280 */
	PTR	sys_request_key
	PTR	sys_keyctl
	PTR	sys_set_thread_area
	PTR	sys_inotify_init
	PTR	sys_inotify_add_watch		/* 4285 */
	PTR	sys_inotify_rm_watch
	PTR	sys_migrate_pages
	PTR	sys_openat
	PTR	sys_mkdirat
	PTR	sys_mknodat			/* 4290 */
	PTR	sys_fchownat
	PTR	sys_futimesat
	PTR	sys_fstatat64
	PTR	sys_unlinkat
	PTR	sys_renameat			/* 4295 */
	PTR	sys_linkat
	PTR	sys_symlinkat
	PTR	sys_readlinkat
	PTR	sys_fchmodat
	PTR	sys_faccessat			/* 4300 */
	PTR	sys_pselect6
	PTR	sys_ppoll
	PTR	sys_unshare
	PTR	sys_splice
	PTR	sys_sync_file_range		/* 4305 */
	PTR	sys_tee
	PTR	sys_vmsplice
	PTR	sys_move_pages
	PTR	sys_set_robust_list
	PTR	sys_get_robust_list		/* 4310 */
	PTR	sys_kexec_load
	PTR	sys_getcpu
	PTR	sys_epoll_pwait
	PTR	sys_ioprio_set
	PTR	sys_ioprio_get			/* 4315 */
	PTR	sys_utimensat
	PTR	sys_signalfd
	PTR	sys_ni_syscall			/* was timerfd */
	PTR	sys_eventfd
	PTR	sys_fallocate			/* 4320 */
	PTR	sys_timerfd_create
	PTR	sys_timerfd_gettime
	PTR	sys_timerfd_settime
	PTR	sys_signalfd4
	PTR	sys_eventfd2			/* 4325 */
	PTR	sys_epoll_create1
	PTR	sys_dup3
	PTR	sys_pipe2
	PTR	sys_inotify_init1
	PTR	sys_preadv			/* 4330 */
	PTR	sys_pwritev
	PTR	sys_rt_tgsigqueueinfo
	PTR	sys_perf_event_open
	PTR	sys_accept4
	PTR	sys_recvmmsg			/* 4335 */
	PTR	sys_fanotify_init
	PTR	sys_fanotify_mark
	PTR	sys_prlimit64
	PTR	sys_name_to_handle_at
	PTR	sys_open_by_handle_at		/* 4340 */
	PTR	sys_clock_adjtime
	PTR	sys_syncfs
	PTR	sys_sendmmsg
	PTR	sys_setns
	PTR	sys_process_vm_readv		/* 4345 */
	PTR	sys_process_vm_writev
	PTR	sys_kcmp
	PTR	sys_finit_module
	PTR	sys_sched_setattr
	PTR	sys_sched_getattr		/* 4350 */
	PTR	sys_renameat2
	PTR	sys_seccomp
	PTR	sys_getrandom
	PTR	sys_memfd_create
	PTR	sys_bpf				/* 4355 */
	PTR	sys_execveat
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
192ef366	6	* Copyright (C) 1995-99, 2000- 02, 06 Ralf Baechle <ralf@linux-mips.org>
1da177e4 LT	7	* Copyright (C) 2001 MIPS Technologies, Inc.
1da177e4 LT	8	* Copyright (C) 2004 Thiemo Seufer
86bdb277	9	* Copyright (C) 2014 Imagination Technologies Ltd.
1da177e4	10	*/
1da177e4 LT	11	#include <linux/errno.h>
	12	#include <asm/asm.h>
	13	#include <asm/asmmacro.h>
192ef366	14	#include <asm/irqflags.h>
1da177e4 LT	15	#include <asm/mipsregs.h>
	16	#include <asm/regdef.h>
	17	#include <asm/stackframe.h>
	18	#include <asm/isadep.h>
	19	#include <asm/sysmips.h>
	20	#include <asm/thread_info.h>
	21	#include <asm/unistd.h>
	22	#include <asm/war.h>
048eb582	23	#include <asm/asm-offsets.h>
1da177e4 LT	24
	25	/* Highest syscall used of any syscall flavour */
	26	#define MAX_SYSCALL_NO __NR_O32_Linux + __NR_O32_Linux_syscalls
	27
70342287	28	.align 5
1da177e4 LT	29	NESTED(handle_sys, PT_SIZE, sp)
	30	.set noat
	31	SAVE_SOME
eae6c0da	32	TRACE_IRQS_ON_RELOAD
1da177e4 LT	33	STI
	34	.set at
	35
	36	lw t1, PT_EPC(sp) # skip syscall on return
	37
1da177e4 LT	38	subu v0, v0, __NR_O32_Linux # check syscall number
1da177e4 LT	39	sltiu t0, v0, __NR_O32_Linux_syscalls + 1
1da177e4 LT	40	addiu t1, 4 # skip to next instruction
	41	sw t1, PT_EPC(sp)
	42	beqz t0, illegal_syscall
	43
46e12c07	44	sll t0, v0, 2
1da177e4 LT	45	la t1, sys_call_table
	46	addu t1, t0
	47	lw t2, (t1) # syscall routine
1da177e4 LT	48	beqz t2, illegal_syscall
	49
	50	sw a3, PT_R26(sp) # save a3 for syscall restarting
1da177e4	51
46e12c07 RB	52	/*
	53	* More than four arguments. Try to deal with it by copying the
	54	* stack arguments from the user stack to the kernel stack.
	55	* This Sucks (TM).
	56	*/
	57	lw t0, PT_R29(sp) # get old user stack pointer
	58
	59	/*
	60	* We intentionally keep the kernel stack a little below the top of
	61	* userspace so we don't have to do a slower byte accurate check here.
	62	*/
	63	lw t5, TI_ADDR_LIMIT($28)
	64	addu t4, t0, 32
	65	and t5, t4
	66	bltz t5, bad_stack # -> sp is bad
	67
	68	/*
	69	* Ok, copy the args from the luser stack to the kernel stack.
46e12c07 RB	70	*/
	71
	72	.set push
	73	.set noreorder
	74	.set nomacro
	75
7928eb03 RB	76	load_a4: user_lw(t5, 16(t0)) # argument #5 from usp
	77	load_a5: user_lw(t6, 20(t0)) # argument #6 from usp
	78	load_a6: user_lw(t7, 24(t0)) # argument #7 from usp
	79	load_a7: user_lw(t8, 28(t0)) # argument #8 from usp
	80	loads_done:
46e12c07 RB	81
	82	sw t5, 16(sp) # argument #5 to ksp
	83	sw t6, 20(sp) # argument #6 to ksp
	84	sw t7, 24(sp) # argument #7 to ksp
	85	sw t8, 28(sp) # argument #8 to ksp
	86	.set pop
	87
	88	.section __ex_table,"a"
7928eb03 RB	89	PTR load_a4, bad_stack_a4
	90	PTR load_a5, bad_stack_a5
	91	PTR load_a6, bad_stack_a6
	92	PTR load_a7, bad_stack_a7
46e12c07 RB	93	.previous
46e12c07 RB	94
1da177e4	95	lw t0, TI_FLAGS($28) # syscall tracing enabled?
e7f3b48a	96	li t1, _TIF_WORK_SYSCALL_ENTRY
1da177e4	97	and t0, t1
70342287	98	bnez t0, syscall_trace_entry # -> yes
1da177e4 LT	99
	100	jalr t2 # Do The Real Thing (TM)
	101
	102	li t0, -EMAXERRNO - 1 # error?
	103	sltu t0, t0, v0
	104	sw t0, PT_R7(sp) # set error flag
	105	beqz t0, 1f
	106
8f5a00eb	107	lw t1, PT_R2(sp) # syscall number
1da177e4	108	negu v0 # error
8f5a00eb	109	sw t1, PT_R0(sp) # save it for syscall restarting
1da177e4 LT	110	1: sw v0, PT_R2(sp) # result
	111
	112	o32_syscall_exit:
02f884ed	113	j syscall_exit_partial
1da177e4 LT	114
	115	/* ------------------------------------------------------------------------ */
	116
	117	syscall_trace_entry:
	118	SAVE_STATIC
	119	move s0, t2
	120	move a0, sp
4c21b8fd MC	121
	122	/*
	123	* syscall number is in v0 unless we called syscall(__NR_###)
	124	* where the real syscall number is in a0
	125	*/
	126	addiu a1, v0, __NR_O32_Linux
	127	bnez v0, 1f /* __NR_syscall at offset 0 */
	128	lw a1, PT_R4(sp)
	129
	130	1: jal syscall_trace_enter
1da177e4	131
9d37c405 MC	132	bltz v0, 2f # seccomp failed? Skip syscall
9d37c405 MC	133
04a7052c RB	134	move t0, s0
04a7052c RB	135	RESTORE_STATIC
1da177e4 LT	136	lw a0, PT_R4(sp) # Restore argument registers
	137	lw a1, PT_R5(sp)
	138	lw a2, PT_R6(sp)
	139	lw a3, PT_R7(sp)
04a7052c	140	jalr t0
1da177e4 LT	141
	142	li t0, -EMAXERRNO - 1 # error?
	143	sltu t0, t0, v0
	144	sw t0, PT_R7(sp) # set error flag
	145	beqz t0, 1f
	146
8f5a00eb	147	lw t1, PT_R2(sp) # syscall number
1da177e4	148	negu v0 # error
8f5a00eb	149	sw t1, PT_R0(sp) # save it for syscall restarting
1da177e4 LT	150	1: sw v0, PT_R2(sp) # result
1da177e4 LT	151
9d37c405	152	2: j syscall_exit
1da177e4 LT	153
	154	/* ------------------------------------------------------------------------ */
	155
1da177e4	156	/*
7928eb03 RB	157	* Our open-coded access area sanity test for the stack pointer
7928eb03 RB	158	* failed. We probably should handle this case a bit more drastic.
1da177e4 LT	159	*/
1da177e4 LT	160	bad_stack:
5b89c004	161	li v0, EFAULT
1da177e4 LT	162	sw v0, PT_R2(sp)
	163	li t0, 1 # set error flag
	164	sw t0, PT_R7(sp)
	165	j o32_syscall_exit
	166
7928eb03 RB	167	bad_stack_a4:
	168	li t5, 0
	169	b load_a5
	170
	171	bad_stack_a5:
	172	li t6, 0
	173	b load_a6
	174
	175	bad_stack_a6:
	176	li t7, 0
	177	b load_a7
	178
	179	bad_stack_a7:
	180	li t8, 0
	181	b loads_done
	182
1da177e4 LT	183	/*
	184	* The system call does not exist in this kernel
	185	*/
	186	illegal_syscall:
bda8229b	187	li v0, ENOSYS # error
1da177e4 LT	188	sw v0, PT_R2(sp)
	189	li t0, 1 # set error flag
	190	sw t0, PT_R7(sp)
	191	j o32_syscall_exit
	192	END(handle_sys)
	193
1da177e4	194	LEAF(sys_syscall)
1da177e4 LT	195	subu t0, a0, __NR_O32_Linux # check syscall number
1da177e4 LT	196	sltiu v0, t0, __NR_O32_Linux_syscalls + 1
e807f957	197	beqz t0, einval # do not recurse
46e12c07	198	sll t1, t0, 2
1da177e4	199	beqz v0, einval
1da177e4	200	lw t2, sys_call_table(t1) # syscall routine
e967ef02	201	sw a0, PT_R2(sp) # call routine directly on restart
1da177e4	202
1da177e4 LT	203	/* Some syscalls like execve get their arguments from struct pt_regs
	204	and claim zero arguments in the syscall table. Thus we have to
	205	assume the worst case and shuffle around all potential arguments.
	206	If you want performance, don't use indirect syscalls. */
	207
	208	move a0, a1 # shift argument registers
	209	move a1, a2
	210	move a2, a3
	211	lw a3, 16(sp)
	212	lw t4, 20(sp)
	213	lw t5, 24(sp)
	214	lw t6, 28(sp)
	215	sw t4, 16(sp)
	216	sw t5, 20(sp)
	217	sw t6, 24(sp)
	218	sw a0, PT_R4(sp) # .. and push back a0 - a3, some
	219	sw a1, PT_R5(sp) # syscalls expect them there
	220	sw a2, PT_R6(sp)
	221	sw a3, PT_R7(sp)
	222	sw a3, PT_R26(sp) # update a3 for syscall restarting
	223	jr t2
	224	/* Unreached */
	225
70342287	226	einval: li v0, -ENOSYS
1da177e4 LT	227	jr ra
	228	END(sys_syscall)
	229
46e12c07 RB	230	.align 2
	231	.type sys_call_table, @object
	232	EXPORT(sys_call_table)
	233	PTR sys_syscall /* 4000 */
	234	PTR sys_exit
	235	PTR __sys_fork
	236	PTR sys_read
	237	PTR sys_write
	238	PTR sys_open /* 4005 */
	239	PTR sys_close
	240	PTR sys_waitpid
	241	PTR sys_creat
	242	PTR sys_link
	243	PTR sys_unlink /* 4010 */
	244	PTR sys_execve
	245	PTR sys_chdir
	246	PTR sys_time
	247	PTR sys_mknod
	248	PTR sys_chmod /* 4015 */
	249	PTR sys_lchown
	250	PTR sys_ni_syscall
	251	PTR sys_ni_syscall /* was sys_stat */
	252	PTR sys_lseek
	253	PTR sys_getpid /* 4020 */
	254	PTR sys_mount
	255	PTR sys_oldumount
	256	PTR sys_setuid
	257	PTR sys_getuid
	258	PTR sys_stime /* 4025 */
	259	PTR sys_ptrace
	260	PTR sys_alarm
	261	PTR sys_ni_syscall /* was sys_fstat */
	262	PTR sys_pause
	263	PTR sys_utime /* 4030 */
	264	PTR sys_ni_syscall
	265	PTR sys_ni_syscall
	266	PTR sys_access
	267	PTR sys_nice
	268	PTR sys_ni_syscall /* 4035 */
	269	PTR sys_sync
	270	PTR sys_kill
	271	PTR sys_rename
	272	PTR sys_mkdir
	273	PTR sys_rmdir /* 4040 */
	274	PTR sys_dup
	275	PTR sysm_pipe
	276	PTR sys_times
	277	PTR sys_ni_syscall
	278	PTR sys_brk /* 4045 */
	279	PTR sys_setgid
	280	PTR sys_getgid
	281	PTR sys_ni_syscall /* was signal(2) */
	282	PTR sys_geteuid
	283	PTR sys_getegid /* 4050 */
	284	PTR sys_acct
	285	PTR sys_umount
	286	PTR sys_ni_syscall
	287	PTR sys_ioctl
	288	PTR sys_fcntl /* 4055 */
	289	PTR sys_ni_syscall
	290	PTR sys_setpgid
	291	PTR sys_ni_syscall
	292	PTR sys_olduname
	293	PTR sys_umask /* 4060 */
294	PTR sys_chroot
295	PTR sys_ustat
296	PTR sys_dup2
297	PTR sys_getppid
298	PTR sys_getpgrp /* 4065 */
299	PTR sys_setsid
300	PTR sys_sigaction
301	PTR sys_sgetmask
302	PTR sys_ssetmask
303	PTR sys_setreuid /* 4070 */
304	PTR sys_setregid
305	PTR sys_sigsuspend
306	PTR sys_sigpending
307	PTR sys_sethostname
308	PTR sys_setrlimit /* 4075 */
309	PTR sys_getrlimit
310	PTR sys_getrusage
311	PTR sys_gettimeofday
312	PTR sys_settimeofday
313	PTR sys_getgroups /* 4080 */
314	PTR sys_setgroups
315	PTR sys_ni_syscall /* old_select */
316	PTR sys_symlink
317	PTR sys_ni_syscall /* was sys_lstat */
318	PTR sys_readlink /* 4085 */
319	PTR sys_uselib
320	PTR sys_swapon
321	PTR sys_reboot
322	PTR sys_old_readdir
323	PTR sys_mips_mmap /* 4090 */
324	PTR sys_munmap
325	PTR sys_truncate
326	PTR sys_ftruncate
327	PTR sys_fchmod
328	PTR sys_fchown /* 4095 */
329	PTR sys_getpriority
330	PTR sys_setpriority
331	PTR sys_ni_syscall
332	PTR sys_statfs
333	PTR sys_fstatfs /* 4100 */
334	PTR sys_ni_syscall /* was ioperm(2) */
335	PTR sys_socketcall
336	PTR sys_syslog
337	PTR sys_setitimer
338	PTR sys_getitimer /* 4105 */
339	PTR sys_newstat
340	PTR sys_newlstat
341	PTR sys_newfstat
342	PTR sys_uname
343	PTR sys_ni_syscall /* 4110 was iopl(2) */
344	PTR sys_vhangup
345	PTR sys_ni_syscall /* was sys_idle() */
346	PTR sys_ni_syscall /* was sys_vm86 */
347	PTR sys_wait4
348	PTR sys_swapoff /* 4115 */
349	PTR sys_sysinfo
350	PTR sys_ipc
351	PTR sys_fsync
352	PTR sys_sigreturn
353	PTR __sys_clone /* 4120 */
354	PTR sys_setdomainname
355	PTR sys_newuname
356	PTR sys_ni_syscall /* sys_modify_ldt */
357	PTR sys_adjtimex
358	PTR sys_mprotect /* 4125 */
359	PTR sys_sigprocmask
360	PTR sys_ni_syscall /* was create_module */
361	PTR sys_init_module
362	PTR sys_delete_module
363	PTR sys_ni_syscall /* 4130 was get_kernel_syms */
364	PTR sys_quotactl
365	PTR sys_getpgid
366	PTR sys_fchdir
367	PTR sys_bdflush
368	PTR sys_sysfs /* 4135 */
369	PTR sys_personality
370	PTR sys_ni_syscall /* for afs_syscall */
371	PTR sys_setfsuid
372	PTR sys_setfsgid
373	PTR sys_llseek /* 4140 */
374	PTR sys_getdents
375	PTR sys_select
376	PTR sys_flock
377	PTR sys_msync
378	PTR sys_readv /* 4145 */
379	PTR sys_writev
380	PTR sys_cacheflush
381	PTR sys_cachectl
382	PTR sys_sysmips
383	PTR sys_ni_syscall /* 4150 */
384	PTR sys_getsid
385	PTR sys_fdatasync
386	PTR sys_sysctl
387	PTR sys_mlock
388	PTR sys_munlock /* 4155 */
389	PTR sys_mlockall
390	PTR sys_munlockall
391	PTR sys_sched_setparam
392	PTR sys_sched_getparam
393	PTR sys_sched_setscheduler /* 4160 */
394	PTR sys_sched_getscheduler
395	PTR sys_sched_yield
396	PTR sys_sched_get_priority_max
397	PTR sys_sched_get_priority_min
398	PTR sys_sched_rr_get_interval /* 4165 */
399	PTR sys_nanosleep
400	PTR sys_mremap
401	PTR sys_accept
402	PTR sys_bind
403	PTR sys_connect /* 4170 */
404	PTR sys_getpeername
405	PTR sys_getsockname
406	PTR sys_getsockopt
407	PTR sys_listen
408	PTR sys_recv /* 4175 */
409	PTR sys_recvfrom
410	PTR sys_recvmsg
411	PTR sys_send
412	PTR sys_sendmsg
413	PTR sys_sendto /* 4180 */
414	PTR sys_setsockopt
415	PTR sys_shutdown
416	PTR sys_socket
417	PTR sys_socketpair
418	PTR sys_setresuid /* 4185 */
419	PTR sys_getresuid
420	PTR sys_ni_syscall /* was sys_query_module */
421	PTR sys_poll
422	PTR sys_ni_syscall /* was nfsservctl */
423	PTR sys_setresgid /* 4190 */
424	PTR sys_getresgid
425	PTR sys_prctl
426	PTR sys_rt_sigreturn
427	PTR sys_rt_sigaction
428	PTR sys_rt_sigprocmask /* 4195 */
429	PTR sys_rt_sigpending
430	PTR sys_rt_sigtimedwait
431	PTR sys_rt_sigqueueinfo
432	PTR sys_rt_sigsuspend
433	PTR sys_pread64 /* 4200 */
434	PTR sys_pwrite64
435	PTR sys_chown
436	PTR sys_getcwd
437	PTR sys_capget
438	PTR sys_capset /* 4205 */
439	PTR sys_sigaltstack
440	PTR sys_sendfile
441	PTR sys_ni_syscall
442	PTR sys_ni_syscall
443	PTR sys_mips_mmap2 /* 4210 */
444	PTR sys_truncate64
445	PTR sys_ftruncate64
446	PTR sys_stat64
447	PTR sys_lstat64
448	PTR sys_fstat64 /* 4215 */
449	PTR sys_pivot_root
450	PTR sys_mincore
451	PTR sys_madvise
452	PTR sys_getdents64
453	PTR sys_fcntl64 /* 4220 */
454	PTR sys_ni_syscall
455	PTR sys_gettid
456	PTR sys_readahead
457	PTR sys_setxattr
458	PTR sys_lsetxattr /* 4225 */
459	PTR sys_fsetxattr
460	PTR sys_getxattr
461	PTR sys_lgetxattr
462	PTR sys_fgetxattr
463	PTR sys_listxattr /* 4230 */
464	PTR sys_llistxattr
465	PTR sys_flistxattr
466	PTR sys_removexattr
467	PTR sys_lremovexattr
468	PTR sys_fremovexattr /* 4235 */
469	PTR sys_tkill
470	PTR sys_sendfile64
471	PTR sys_futex
f088fc84 RB	472	#ifdef CONFIG_MIPS_MT_FPAFF
	473	/*
	474	* For FPU affinity scheduling on MIPS MT processors, we need to
	475	* intercept sys_sched_xxxaffinity() calls until we get a proper hook
0a0fca9d VK	476	* in kernel/sched/core.c. Considered only temporary we only support
	477	* these hooks for the 32-bit kernel - there is no MIPS64 MT processor
	478	* atm.
f088fc84	479	*/
46e12c07 RB	480	PTR mipsmt_sys_sched_setaffinity
46e12c07 RB	481	PTR mipsmt_sys_sched_getaffinity
f088fc84	482	#else
46e12c07 RB	483	PTR sys_sched_setaffinity
46e12c07 RB	484	PTR sys_sched_getaffinity /* 4240 */
f088fc84	485	#endif /* CONFIG_MIPS_MT_FPAFF */
46e12c07 RB	486	PTR sys_io_setup
	487	PTR sys_io_destroy
	488	PTR sys_io_getevents
	489	PTR sys_io_submit
	490	PTR sys_io_cancel /* 4245 */
	491	PTR sys_exit_group
	492	PTR sys_lookup_dcookie
	493	PTR sys_epoll_create
	494	PTR sys_epoll_ctl
	495	PTR sys_epoll_wait /* 4250 */
	496	PTR sys_remap_file_pages
	497	PTR sys_set_tid_address
	498	PTR sys_restart_syscall
	499	PTR sys_fadvise64_64
	500	PTR sys_statfs64 /* 4255 */
	501	PTR sys_fstatfs64
	502	PTR sys_timer_create
	503	PTR sys_timer_settime
	504	PTR sys_timer_gettime
	505	PTR sys_timer_getoverrun /* 4260 */
	506	PTR sys_timer_delete
	507	PTR sys_clock_settime
	508	PTR sys_clock_gettime
	509	PTR sys_clock_getres
	510	PTR sys_clock_nanosleep /* 4265 */
	511	PTR sys_tgkill
	512	PTR sys_utimes
	513	PTR sys_mbind
1ff1ad6b HC	514	PTR sys_get_mempolicy
1ff1ad6b HC	515	PTR sys_set_mempolicy /* 4270 */
46e12c07 RB	516	PTR sys_mq_open
	517	PTR sys_mq_unlink
	518	PTR sys_mq_timedsend
	519	PTR sys_mq_timedreceive
	520	PTR sys_mq_notify /* 4275 */
	521	PTR sys_mq_getsetattr
	522	PTR sys_ni_syscall /* sys_vserver */
	523	PTR sys_waitid
	524	PTR sys_ni_syscall /* available, was setaltroot */
	525	PTR sys_add_key /* 4280 */
	526	PTR sys_request_key
	527	PTR sys_keyctl
	528	PTR sys_set_thread_area
	529	PTR sys_inotify_init
	530	PTR sys_inotify_add_watch /* 4285 */
	531	PTR sys_inotify_rm_watch
	532	PTR sys_migrate_pages
	533	PTR sys_openat
	534	PTR sys_mkdirat
	535	PTR sys_mknodat /* 4290 */
	536	PTR sys_fchownat
	537	PTR sys_futimesat
	538	PTR sys_fstatat64
	539	PTR sys_unlinkat
	540	PTR sys_renameat /* 4295 */
	541	PTR sys_linkat
	542	PTR sys_symlinkat
	543	PTR sys_readlinkat
	544	PTR sys_fchmodat
	545	PTR sys_faccessat /* 4300 */
	546	PTR sys_pselect6
	547	PTR sys_ppoll
	548	PTR sys_unshare
	549	PTR sys_splice
	550	PTR sys_sync_file_range /* 4305 */
	551	PTR sys_tee
	552	PTR sys_vmsplice
	553	PTR sys_move_pages
	554	PTR sys_set_robust_list
	555	PTR sys_get_robust_list /* 4310 */
	556	PTR sys_kexec_load
	557	PTR sys_getcpu
	558	PTR sys_epoll_pwait
	559	PTR sys_ioprio_set
	560	PTR sys_ioprio_get /* 4315 */
	561	PTR sys_utimensat
	562	PTR sys_signalfd
	563	PTR sys_ni_syscall /* was timerfd */
	564	PTR sys_eventfd
	565	PTR sys_fallocate /* 4320 */
	566	PTR sys_timerfd_create
	567	PTR sys_timerfd_gettime
	568	PTR sys_timerfd_settime
	569	PTR sys_signalfd4
	570	PTR sys_eventfd2 /* 4325 */
	571	PTR sys_epoll_create1
	572	PTR sys_dup3
	573	PTR sys_pipe2
	574	PTR sys_inotify_init1
	575	PTR sys_preadv /* 4330 */
	576	PTR sys_pwritev
	577	PTR sys_rt_tgsigqueueinfo
	578	PTR sys_perf_event_open
	579	PTR sys_accept4
580	PTR sys_recvmmsg /* 4335 */
581	PTR sys_fanotify_init
582	PTR sys_fanotify_mark
583	PTR sys_prlimit64
584	PTR sys_name_to_handle_at
585	PTR sys_open_by_handle_at /* 4340 */
586	PTR sys_clock_adjtime
587	PTR sys_syncfs
588	PTR sys_sendmmsg
589	PTR sys_setns
590	PTR sys_process_vm_readv /* 4345 */
591	PTR sys_process_vm_writev
592	PTR sys_kcmp
593	PTR sys_finit_module
6776254b JH	594	PTR sys_sched_setattr
6776254b JH	595	PTR sys_sched_getattr /* 4350 */
367f0b50	596	PTR sys_renameat2
8855d608	597	PTR sys_seccomp
42944521 RB	598	PTR sys_getrandom
42944521 RB	599	PTR sys_memfd_create
5df4c8db	600	PTR sys_bpf /* 4355 */
389cdc5d	601	PTR sys_execveat