scall64-o32.S 12.6 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
/*
 * 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>
19
#include <asm/irqflags.h>
L
Linus Torvalds 已提交
20 21 22 23 24 25 26 27 28 29 30
#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
31
	TRACE_IRQS_ON_RELOAD
L
Linus Torvalds 已提交
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
	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

128 129
	move	t0, s0
	RESTORE_STATIC
L
Linus Torvalds 已提交
130 131 132 133 134 135 136 137
	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
138
	jalr	t0
L
Linus Torvalds 已提交
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176

	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)
177 178 179 180
	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
L
Linus Torvalds 已提交
181
	beqz	v0, einval
182
	ld	t2, sys_call_table(t1)		# syscall routine
L
Linus Torvalds 已提交
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198

	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 */

199
einval:	li	v0, -ENOSYS
L
Linus Torvalds 已提交
200 201 202 203 204 205 206 207 208 209 210
	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
211
	PTR	compat_sys_open			/* 4005 */
L
Linus Torvalds 已提交
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
	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 */
R
Ralf Baechle 已提交
227
	PTR	compat_sys_mount
L
Linus Torvalds 已提交
228 229 230 231
	PTR	sys_oldumount
	PTR	sys_setuid
	PTR	sys_getuid
	PTR	compat_sys_stime		/* 4025 */
T
Thomas Bogendoerfer 已提交
232
	PTR	compat_sys_ptrace
L
Linus Torvalds 已提交
233 234 235 236 237 238 239 240 241 242 243 244 245 246 247
	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
248
	PTR	sysm_pipe
L
Linus Torvalds 已提交
249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
	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
C
Christoph Hellwig 已提交
268
	PTR	compat_sys_ustat
L
Linus Torvalds 已提交
269 270 271 272
	PTR	sys_dup2
	PTR	sys_getppid
	PTR	sys_getpgrp			/* 4065 */
	PTR	sys_setsid
273
	PTR	sys_32_sigaction
L
Linus Torvalds 已提交
274 275 276 277 278 279 280 281 282 283
	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
284 285
	PTR	compat_sys_gettimeofday
	PTR	compat_sys_settimeofday
L
Linus Torvalds 已提交
286 287 288 289 290 291 292 293 294
	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
295
	PTR	compat_sys_old_readdir
296
	PTR	sys_mips_mmap			/* 4090 */
L
Linus Torvalds 已提交
297 298 299 300 301 302 303 304 305 306 307
	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 */
308
	PTR	compat_sys_socketcall
L
Linus Torvalds 已提交
309 310 311 312 313 314 315 316 317 318 319
	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 */
320
	PTR	compat_sys_wait4
L
Linus Torvalds 已提交
321
	PTR	sys_swapoff			/* 4115 */
322
	PTR	compat_sys_sysinfo
323
	PTR	sys_32_ipc
L
Linus Torvalds 已提交
324 325
	PTR	sys_fsync
	PTR	sys32_sigreturn
R
Ralf Baechle 已提交
326
	PTR	sys32_clone			/* 4120 */
L
Linus Torvalds 已提交
327
	PTR	sys_setdomainname
328
	PTR	sys_32_newuname
L
Linus Torvalds 已提交
329
	PTR	sys_ni_syscall			/* sys_modify_ldt */
330
	PTR	compat_sys_adjtimex
L
Linus Torvalds 已提交
331 332 333 334 335 336 337 338 339 340 341
	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 */
342
	PTR	sys_32_personality
L
Linus Torvalds 已提交
343 344 345
	PTR	sys_ni_syscall	 		/* for afs_syscall */
	PTR	sys_setfsuid
	PTR	sys_setfsgid
346
	PTR	sys_32_llseek			/* 4140 */
347
	PTR	compat_sys_getdents
L
Linus Torvalds 已提交
348 349 350 351 352 353 354 355 356 357 358
	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
359
	PTR	sys_32_sysctl
L
Linus Torvalds 已提交
360 361 362 363 364 365 366 367 368 369 370
	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
371
	PTR	sys_32_sched_rr_get_interval 	/* 4165 */
L
Linus Torvalds 已提交
372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
	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
395
	PTR	compat_sys_nfsservctl
L
Linus Torvalds 已提交
396 397 398 399
	PTR	sys_setresgid			/* 4190 */
	PTR	sys_getresgid
	PTR	sys_prctl
	PTR	sys32_rt_sigreturn
400 401 402
	PTR	sys_32_rt_sigaction
	PTR	sys_32_rt_sigprocmask 		/* 4195 */
	PTR	sys_32_rt_sigpending
L
Linus Torvalds 已提交
403
	PTR	compat_sys_rt_sigtimedwait
404
	PTR	sys_32_rt_sigqueueinfo
L
Linus Torvalds 已提交
405
	PTR	sys32_rt_sigsuspend
406 407
	PTR	sys_32_pread			/* 4200 */
	PTR	sys_32_pwrite
L
Linus Torvalds 已提交
408 409 410 411 412
	PTR	sys_chown
	PTR	sys_getcwd
	PTR	sys_capget
	PTR	sys_capset			/* 4205 */
	PTR	sys32_sigaltstack
413
	PTR	sys_32_sendfile
L
Linus Torvalds 已提交
414 415
	PTR	sys_ni_syscall
	PTR	sys_ni_syscall
416 417 418
	PTR	sys_mips_mmap2			/* 4210 */
	PTR	sys_32_truncate64
	PTR	sys_32_ftruncate64
L
Linus Torvalds 已提交
419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
	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
460
	PTR	sys32_fadvise64_64
L
Linus Torvalds 已提交
461 462
	PTR	compat_sys_statfs64		/* 4255 */
	PTR	compat_sys_fstatfs64
463
	PTR	compat_sys_timer_create
L
Linus Torvalds 已提交
464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
	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 */
484
	PTR	sys_32_waitid
L
Linus Torvalds 已提交
485 486 487 488
	PTR	sys_ni_syscall			/* available, was setaltroot */
	PTR	sys_add_key			/* 4280 */
	PTR	sys_request_key
	PTR	sys_keyctl
R
Ralf Baechle 已提交
489
	PTR	sys_set_thread_area
R
Ralf Baechle 已提交
490 491 492
	PTR	sys_inotify_init
	PTR	sys_inotify_add_watch		/* 4285 */
	PTR	sys_inotify_rm_watch
R
Ralf Baechle 已提交
493 494 495 496 497 498
	PTR	sys_migrate_pages
	PTR	compat_sys_openat
	PTR	sys_mkdirat
	PTR	sys_mknodat			/* 4290 */
	PTR	sys_fchownat
	PTR	compat_sys_futimesat
499
	PTR	sys_newfstatat
R
Ralf Baechle 已提交
500 501 502 503 504 505 506
	PTR	sys_unlinkat
	PTR	sys_renameat			/* 4295 */
	PTR	sys_linkat
	PTR	sys_symlinkat
	PTR	sys_readlinkat
	PTR	sys_fchmodat
	PTR	sys_faccessat			/* 4300 */
J
Joseph S. Myers 已提交
507
	PTR	compat_sys_pselect6
R
Ralf Baechle 已提交
508 509
	PTR	sys_ppoll
	PTR	sys_unshare
R
Ralf Baechle 已提交
510
	PTR	sys_splice
511
	PTR	sys32_sync_file_range		/* 4305 */
R
Ralf Baechle 已提交
512
	PTR	sys_tee
513
	PTR	compat_sys_vmsplice
514
	PTR	compat_sys_move_pages
515 516
	PTR	compat_sys_set_robust_list
	PTR	compat_sys_get_robust_list	/* 4310 */
N
Nicolas Schichan 已提交
517
	PTR	compat_sys_kexec_load
518
	PTR	sys_getcpu
519
	PTR	compat_sys_epoll_pwait
520 521
	PTR	sys_ioprio_set
	PTR	sys_ioprio_get			/* 4315 */
522 523
	PTR	compat_sys_utimensat
	PTR	compat_sys_signalfd
D
Davide Libenzi 已提交
524
	PTR	sys_ni_syscall
525
	PTR	sys_eventfd
526
	PTR	sys32_fallocate			/* 4320 */
527 528 529
	PTR	sys_timerfd_create
	PTR	sys_timerfd_gettime
	PTR	sys_timerfd_settime
R
Ralf Baechle 已提交
530 531 532 533 534 535
	PTR	compat_sys_signalfd4
	PTR	sys_eventfd2			/* 4325 */
	PTR	sys_epoll_create1
	PTR	sys_dup3
	PTR	sys_pipe2
	PTR	sys_inotify_init1
L
Linus Torvalds 已提交
536
	.size	sys_call_table,.-sys_call_table