mips: rename scall64-64.S to scall64-n64.S

When we get nanoMIPS support we'll be introducing the p32
ABI, and there's a reasonable chance that the equivalent
p64 ABI may come along in the future. Using 'n64' now would
avoid confusion in that case where we may have 2 different
64-bit ABIs.

Suggested-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Firoz Khan <firoz.khan@linaro.org>
[paul.burton@mips.com:
  - Remove UAPI macro renaming, github code search shows at least the
    chromium project uses __NR_64_Linux & __NR_64_Linux_syscalls.]
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: y2038@lists.linaro.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: arnd@arndb.de
Cc: deepa.kernel@gmail.com
Cc: marcin.juszkiewicz@linaro.org

1 files changed, 444 insertions, 0 deletions

diff --git a/arch/mips/kernel/scall64-n64.S b/arch/mips/kernel/scall64-n64.S
new file mode 100644
index 000000000000..358d9599983d
--- /dev/null
+++ b/arch/mips/kernel/scall64-n64.S
@@ -0,0 +1,444 @@
+/*
+ * 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, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ */
+#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/asm-offsets.h>
+#include <asm/sysmips.h>
+#include <asm/thread_info.h>
+#include <asm/unistd.h>
+#include <asm/war.h>
+
+#ifndef CONFIG_BINFMT_ELF32
+/* Neither O32 nor N32, so define handle_sys here */
+#define handle_sys64 handle_sys
+#endif
+
+	.align	5
+NESTED(handle_sys64, PT_SIZE, sp)
+#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
+	/*
+	 * When 32-bit compatibility is configured scall_o32.S
+	 * already did this.
+	 */
+	.set	noat
+	SAVE_SOME
+	TRACE_IRQS_ON_RELOAD
+	STI
+	.set	at
+#endif
+
+#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
+	ld	t1, PT_EPC(sp)		# skip syscall on return
+	daddiu	t1, 4			# skip to next instruction
+	sd	t1, PT_EPC(sp)
+#endif
+
+	sd	a3, PT_R26(sp)		# save a3 for syscall restarting
+
+	li	t1, _TIF_WORK_SYSCALL_ENTRY
+	LONG_L	t0, TI_FLAGS($28)	# syscall tracing enabled?
+	and	t0, t1, t0
+	bnez	t0, syscall_trace_entry
+
+syscall_common:
+	dsubu	t2, v0, __NR_64_Linux
+	sltiu   t0, t2, __NR_64_Linux_syscalls + 1
+	beqz	t0, illegal_syscall
+
+	dsll	t0, t2, 3		# offset into table
+	dla	t2, sys_call_table
+	daddu	t0, t2, t0
+	ld	t2, (t0)		# syscall routine
+	beqz	t2, illegal_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
+
+n64_syscall_exit:
+	j	syscall_exit_partial
+
+/* ------------------------------------------------------------------------ */
+
+syscall_trace_entry:
+	SAVE_STATIC
+	move	a0, sp
+	move	a1, v0
+	jal	syscall_trace_enter
+
+	bltz	v0, 1f			# seccomp failed? Skip syscall
+
+	RESTORE_STATIC
+	ld	v0, PT_R2(sp)		# Restore syscall (maybe modified)
+	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)
+	j	syscall_common
+
+1:	j	syscall_exit
+
+illegal_syscall:
+	/* This also isn't a 64-bit syscall, throw an error.  */
+	li	v0, ENOSYS			# error
+	sd	v0, PT_R2(sp)
+	li	t0, 1				# set error flag
+	sd	t0, PT_R7(sp)
+	j	n64_syscall_exit
+	END(handle_sys64)
+
+	.align	3
+	.type	sys_call_table, @object
+EXPORT(sys_call_table)
+	PTR	sys_read			/* 5000 */
+	PTR	sys_write
+	PTR	sys_open
+	PTR	sys_close
+	PTR	sys_newstat
+	PTR	sys_newfstat			/* 5005 */
+	PTR	sys_newlstat
+	PTR	sys_poll
+	PTR	sys_lseek
+	PTR	sys_mips_mmap
+	PTR	sys_mprotect			/* 5010 */
+	PTR	sys_munmap
+	PTR	sys_brk
+	PTR	sys_rt_sigaction
+	PTR	sys_rt_sigprocmask
+	PTR	sys_ioctl			/* 5015 */
+	PTR	sys_pread64
+	PTR	sys_pwrite64
+	PTR	sys_readv
+	PTR	sys_writev
+	PTR	sys_access			/* 5020 */
+	PTR	sysm_pipe
+	PTR	sys_select
+	PTR	sys_sched_yield
+	PTR	sys_mremap
+	PTR	sys_msync			/* 5025 */
+	PTR	sys_mincore
+	PTR	sys_madvise
+	PTR	sys_shmget
+	PTR	sys_shmat
+	PTR	sys_shmctl			/* 5030 */
+	PTR	sys_dup
+	PTR	sys_dup2
+	PTR	sys_pause
+	PTR	sys_nanosleep
+	PTR	sys_getitimer			/* 5035 */
+	PTR	sys_setitimer
+	PTR	sys_alarm
+	PTR	sys_getpid
+	PTR	sys_sendfile64
+	PTR	sys_socket			/* 5040 */
+	PTR	sys_connect
+	PTR	sys_accept
+	PTR	sys_sendto
+	PTR	sys_recvfrom
+	PTR	sys_sendmsg			/* 5045 */
+	PTR	sys_recvmsg
+	PTR	sys_shutdown
+	PTR	sys_bind
+	PTR	sys_listen
+	PTR	sys_getsockname			/* 5050 */
+	PTR	sys_getpeername
+	PTR	sys_socketpair
+	PTR	sys_setsockopt
+	PTR	sys_getsockopt
+	PTR	__sys_clone			/* 5055 */
+	PTR	__sys_fork
+	PTR	sys_execve
+	PTR	sys_exit
+	PTR	sys_wait4
+	PTR	sys_kill			/* 5060 */
+	PTR	sys_newuname
+	PTR	sys_semget
+	PTR	sys_semop
+	PTR	sys_semctl
+	PTR	sys_shmdt			/* 5065 */
+	PTR	sys_msgget
+	PTR	sys_msgsnd
+	PTR	sys_msgrcv
+	PTR	sys_msgctl
+	PTR	sys_fcntl			/* 5070 */
+	PTR	sys_flock
+	PTR	sys_fsync
+	PTR	sys_fdatasync
+	PTR	sys_truncate
+	PTR	sys_ftruncate			/* 5075 */
+	PTR	sys_getdents
+	PTR	sys_getcwd
+	PTR	sys_chdir
+	PTR	sys_fchdir
+	PTR	sys_rename			/* 5080 */
+	PTR	sys_mkdir
+	PTR	sys_rmdir
+	PTR	sys_creat
+	PTR	sys_link
+	PTR	sys_unlink			/* 5085 */
+	PTR	sys_symlink
+	PTR	sys_readlink
+	PTR	sys_chmod
+	PTR	sys_fchmod
+	PTR	sys_chown			/* 5090 */
+	PTR	sys_fchown
+	PTR	sys_lchown
+	PTR	sys_umask
+	PTR	sys_gettimeofday
+	PTR	sys_getrlimit			/* 5095 */
+	PTR	sys_getrusage
+	PTR	sys_sysinfo
+	PTR	sys_times
+	PTR	sys_ptrace
+	PTR	sys_getuid			/* 5100 */
+	PTR	sys_syslog
+	PTR	sys_getgid
+	PTR	sys_setuid
+	PTR	sys_setgid
+	PTR	sys_geteuid			/* 5105 */
+	PTR	sys_getegid
+	PTR	sys_setpgid
+	PTR	sys_getppid
+	PTR	sys_getpgrp
+	PTR	sys_setsid			/* 5110 */
+	PTR	sys_setreuid
+	PTR	sys_setregid
+	PTR	sys_getgroups
+	PTR	sys_setgroups
+	PTR	sys_setresuid			/* 5115 */
+	PTR	sys_getresuid
+	PTR	sys_setresgid
+	PTR	sys_getresgid
+	PTR	sys_getpgid
+	PTR	sys_setfsuid			/* 5120 */
+	PTR	sys_setfsgid
+	PTR	sys_getsid
+	PTR	sys_capget
+	PTR	sys_capset
+	PTR	sys_rt_sigpending		/* 5125 */
+	PTR	sys_rt_sigtimedwait
+	PTR	sys_rt_sigqueueinfo
+	PTR	sys_rt_sigsuspend
+	PTR	sys_sigaltstack
+	PTR	sys_utime			/* 5130 */
+	PTR	sys_mknod
+	PTR	sys_personality
+	PTR	sys_ustat
+	PTR	sys_statfs
+	PTR	sys_fstatfs			/* 5135 */
+	PTR	sys_sysfs
+	PTR	sys_getpriority
+	PTR	sys_setpriority
+	PTR	sys_sched_setparam
+	PTR	sys_sched_getparam		/* 5140 */
+	PTR	sys_sched_setscheduler
+	PTR	sys_sched_getscheduler
+	PTR	sys_sched_get_priority_max
+	PTR	sys_sched_get_priority_min
+	PTR	sys_sched_rr_get_interval	/* 5145 */
+	PTR	sys_mlock
+	PTR	sys_munlock
+	PTR	sys_mlockall
+	PTR	sys_munlockall
+	PTR	sys_vhangup			/* 5150 */
+	PTR	sys_pivot_root
+	PTR	sys_sysctl
+	PTR	sys_prctl
+	PTR	sys_adjtimex
+	PTR	sys_setrlimit			/* 5155 */
+	PTR	sys_chroot
+	PTR	sys_sync
+	PTR	sys_acct
+	PTR	sys_settimeofday
+	PTR	sys_mount			/* 5160 */
+	PTR	sys_umount
+	PTR	sys_swapon
+	PTR	sys_swapoff
+	PTR	sys_reboot
+	PTR	sys_sethostname			/* 5165 */
+	PTR	sys_setdomainname
+	PTR	sys_ni_syscall			/* was create_module */
+	PTR	sys_init_module
+	PTR	sys_delete_module
+	PTR	sys_ni_syscall			/* 5170, was get_kernel_syms */
+	PTR	sys_ni_syscall			/* was query_module */
+	PTR	sys_quotactl
+	PTR	sys_ni_syscall			/* was nfsservctl */
+	PTR	sys_ni_syscall			/* res. for getpmsg */
+	PTR	sys_ni_syscall			/* 5175	 for putpmsg */
+	PTR	sys_ni_syscall			/* res. for afs_syscall */
+	PTR	sys_ni_syscall			/* res. for security */
+	PTR	sys_gettid
+	PTR	sys_readahead
+	PTR	sys_setxattr			/* 5180 */
+	PTR	sys_lsetxattr
+	PTR	sys_fsetxattr
+	PTR	sys_getxattr
+	PTR	sys_lgetxattr
+	PTR	sys_fgetxattr			/* 5185 */
+	PTR	sys_listxattr
+	PTR	sys_llistxattr
+	PTR	sys_flistxattr
+	PTR	sys_removexattr
+	PTR	sys_lremovexattr		/* 5190 */
+	PTR	sys_fremovexattr
+	PTR	sys_tkill
+	PTR	sys_ni_syscall
+	PTR	sys_futex
+	PTR	sys_sched_setaffinity		/* 5195 */
+	PTR	sys_sched_getaffinity
+	PTR	sys_cacheflush
+	PTR	sys_cachectl
+	PTR	__sys_sysmips
+	PTR	sys_io_setup			/* 5200 */
+	PTR	sys_io_destroy
+	PTR	sys_io_getevents
+	PTR	sys_io_submit
+	PTR	sys_io_cancel
+	PTR	sys_exit_group			/* 5205 */
+	PTR	sys_lookup_dcookie
+	PTR	sys_epoll_create
+	PTR	sys_epoll_ctl
+	PTR	sys_epoll_wait
+	PTR	sys_remap_file_pages		/* 5210 */
+	PTR	sys_rt_sigreturn
+	PTR	sys_set_tid_address
+	PTR	sys_restart_syscall
+	PTR	sys_semtimedop
+	PTR	sys_fadvise64_64		/* 5215 */
+	PTR	sys_timer_create
+	PTR	sys_timer_settime
+	PTR	sys_timer_gettime
+	PTR	sys_timer_getoverrun
+	PTR	sys_timer_delete		/* 5220 */
+	PTR	sys_clock_settime
+	PTR	sys_clock_gettime
+	PTR	sys_clock_getres
+	PTR	sys_clock_nanosleep
+	PTR	sys_tgkill			/* 5225 */
+	PTR	sys_utimes
+	PTR	sys_mbind
+	PTR	sys_get_mempolicy
+	PTR	sys_set_mempolicy
+	PTR	sys_mq_open			/* 5230 */
+	PTR	sys_mq_unlink
+	PTR	sys_mq_timedsend
+	PTR	sys_mq_timedreceive
+	PTR	sys_mq_notify
+	PTR	sys_mq_getsetattr		/* 5235 */
+	PTR	sys_ni_syscall			/* sys_vserver */
+	PTR	sys_waitid
+	PTR	sys_ni_syscall			/* available, was setaltroot */
+	PTR	sys_add_key
+	PTR	sys_request_key			/* 5240 */
+	PTR	sys_keyctl
+	PTR	sys_set_thread_area
+	PTR	sys_inotify_init
+	PTR	sys_inotify_add_watch
+	PTR	sys_inotify_rm_watch		/* 5245 */
+	PTR	sys_migrate_pages
+	PTR	sys_openat
+	PTR	sys_mkdirat
+	PTR	sys_mknodat
+	PTR	sys_fchownat			/* 5250 */
+	PTR	sys_futimesat
+	PTR	sys_newfstatat
+	PTR	sys_unlinkat
+	PTR	sys_renameat
+	PTR	sys_linkat			/* 5255 */
+	PTR	sys_symlinkat
+	PTR	sys_readlinkat
+	PTR	sys_fchmodat
+	PTR	sys_faccessat
+	PTR	sys_pselect6			/* 5260 */
+	PTR	sys_ppoll
+	PTR	sys_unshare
+	PTR	sys_splice
+	PTR	sys_sync_file_range
+	PTR	sys_tee				/* 5265 */
+	PTR	sys_vmsplice
+	PTR	sys_move_pages
+	PTR	sys_set_robust_list
+	PTR	sys_get_robust_list
+	PTR	sys_kexec_load			/* 5270 */
+	PTR	sys_getcpu
+	PTR	sys_epoll_pwait
+	PTR	sys_ioprio_set
+	PTR	sys_ioprio_get
+	PTR	sys_utimensat			/* 5275 */
+	PTR	sys_signalfd
+	PTR	sys_ni_syscall			/* was timerfd */
+	PTR	sys_eventfd
+	PTR	sys_fallocate
+	PTR	sys_timerfd_create		/* 5280 */
+	PTR	sys_timerfd_gettime
+	PTR	sys_timerfd_settime
+	PTR	sys_signalfd4
+	PTR	sys_eventfd2
+	PTR	sys_epoll_create1		/* 5285 */
+	PTR	sys_dup3
+	PTR	sys_pipe2
+	PTR	sys_inotify_init1
+	PTR	sys_preadv
+	PTR	sys_pwritev			/* 5290 */
+	PTR	sys_rt_tgsigqueueinfo
+	PTR	sys_perf_event_open
+	PTR	sys_accept4
+	PTR	sys_recvmmsg
+	PTR	sys_fanotify_init		/* 5295 */
+	PTR	sys_fanotify_mark
+	PTR	sys_prlimit64
+	PTR	sys_name_to_handle_at
+	PTR	sys_open_by_handle_at
+	PTR	sys_clock_adjtime		/* 5300 */
+	PTR	sys_syncfs
+	PTR	sys_sendmmsg
+	PTR	sys_setns
+	PTR	sys_process_vm_readv
+	PTR	sys_process_vm_writev		/* 5305 */
+	PTR	sys_kcmp
+	PTR	sys_finit_module
+	PTR	sys_getdents64
+	PTR	sys_sched_setattr
+	PTR	sys_sched_getattr		/* 5310 */
+	PTR	sys_renameat2
+	PTR	sys_seccomp
+	PTR	sys_getrandom
+	PTR	sys_memfd_create
+	PTR	sys_bpf				/* 5315 */
+	PTR	sys_execveat
+	PTR	sys_userfaultfd
+	PTR	sys_membarrier
+	PTR	sys_mlock2
+	PTR	sys_copy_file_range		/* 5320 */
+	PTR	sys_preadv2
+	PTR	sys_pwritev2
+	PTR	sys_pkey_mprotect
+	PTR	sys_pkey_alloc
+	PTR	sys_pkey_free			/* 5325 */
+	PTR	sys_statx
+	PTR	sys_rseq
+	PTR	sys_io_pgetevents
+	.size	sys_call_table,.-sys_call_table