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
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
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
16 #include <linux/errno.h>
18 #include <asm/asmmacro.h>
19 #include <asm/irqflags.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>
28 NESTED(handle_sys, PT_SIZE, sp)
34 ld t1, PT_EPC(sp) # skip syscall on return
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
40 beqz t0, not_o32_scall
48 /* We don't want to stumble over broken sign extensions from
49 userland. O32 does never use the upper half. */
55 dsll t0, v0, 3 # offset into table
56 ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0)
58 sd a3, PT_R26(sp) # save a3 for syscall restarting
61 * More than four arguments. Try to deal with it by copying the
62 * stack arguments from the user stack to the kernel stack.
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.
68 ld t0, PT_R29(sp) # get old user stack pointer
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)
77 .section __ex_table,"a"
84 li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
85 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
87 bnez t0, trace_a_syscall
89 jalr t2 # Do The Real Thing (TM)
91 li t0, -EMAXERRNO - 1 # error?
93 sd t0, PT_R7(sp) # set error flag
96 ld t1, PT_R2(sp) # syscall number
98 sd t1, PT_R0(sp) # save it for syscall restarting
99 1: sd v0, PT_R2(sp) # result
102 local_irq_disable # make need_resched and
103 # signals dont change between
104 # sampling and return
105 LONG_L a2, TI_FLAGS($28)
106 li t0, _TIF_ALLWORK_MASK
108 bnez t0, o32_syscall_exit_work
112 o32_syscall_exit_work:
113 j syscall_exit_work_partial
115 /* ------------------------------------------------------------------------ */
119 sd a4, PT_R8(sp) # Save argument registers
122 sd a7, PT_R11(sp) # For indirect syscalls
124 move s0, t2 # Save syscall pointer
126 jal syscall_trace_enter
130 ld a0, PT_R4(sp) # Restore argument registers
137 ld a7, PT_R11(sp) # For indirect syscalls
140 li t0, -EMAXERRNO - 1 # error?
142 sd t0, PT_R7(sp) # set error flag
145 ld t1, PT_R2(sp) # syscall number
147 sd t1, PT_R0(sp) # save it for syscall restarting
148 1: sd v0, PT_R2(sp) # result
152 /* ------------------------------------------------------------------------ */
155 * The stackpointer for a call with more than 4 arguments is bad.
160 li t0, 1 # set error flag
166 * This is not an o32 compatibility syscall, pass it on
167 * to the 64-bit syscall handlers.
169 #ifdef CONFIG_MIPS32_N32
177 subu t0, a0, __NR_O32_Linux # check syscall number
178 sltiu v0, t0, __NR_O32_Linux_syscalls + 1
179 beqz t0, einval # do not recurse
182 ld t2, sys_call_table(t1) # syscall routine
184 move a0, a1 # shift argument registers
191 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
192 sd a1, PT_R5(sp) # syscalls expect them there
195 sd a3, PT_R26(sp) # update a3 for syscall restarting
199 einval: li v0, -ENOSYS
204 .type sys_call_table,@object
206 PTR sys32_syscall /* 4000 */
211 PTR compat_sys_open /* 4005 */
216 PTR sys_unlink /* 4010 */
221 PTR sys_chmod /* 4015 */
224 PTR sys_ni_syscall /* was sys_stat */
226 PTR sys_getpid /* 4020 */
231 PTR compat_sys_stime /* 4025 */
232 PTR compat_sys_ptrace
234 PTR sys_ni_syscall /* was sys_fstat */
236 PTR compat_sys_utime /* 4030 */
241 PTR sys_ni_syscall /* 4035 */
246 PTR sys_rmdir /* 4040 */
251 PTR sys_brk /* 4045 */
254 PTR sys_ni_syscall /* was signal 2 */
256 PTR sys_getegid /* 4050 */
261 PTR compat_sys_fcntl /* 4055 */
266 PTR sys_umask /* 4060 */
271 PTR sys_getpgrp /* 4065 */
276 PTR sys_setreuid /* 4070 */
279 PTR compat_sys_sigpending
281 PTR compat_sys_setrlimit /* 4075 */
282 PTR compat_sys_getrlimit
283 PTR compat_sys_getrusage
284 PTR compat_sys_gettimeofday
285 PTR compat_sys_settimeofday
286 PTR sys_getgroups /* 4080 */
288 PTR sys_ni_syscall /* old_select */
290 PTR sys_ni_syscall /* was sys_lstat */
291 PTR sys_readlink /* 4085 */
295 PTR compat_sys_old_readdir
296 PTR sys_mips_mmap /* 4090 */
301 PTR sys_fchown /* 4095 */
305 PTR compat_sys_statfs
306 PTR compat_sys_fstatfs /* 4100 */
307 PTR sys_ni_syscall /* sys_ioperm */
308 PTR compat_sys_socketcall
310 PTR compat_sys_setitimer
311 PTR compat_sys_getitimer /* 4105 */
312 PTR compat_sys_newstat
313 PTR compat_sys_newlstat
314 PTR compat_sys_newfstat
316 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
318 PTR sys_ni_syscall /* was sys_idle */
319 PTR sys_ni_syscall /* sys_vm86 */
321 PTR sys_swapoff /* 4115 */
322 PTR compat_sys_sysinfo
326 PTR sys32_clone /* 4120 */
327 PTR sys_setdomainname
329 PTR sys_ni_syscall /* sys_modify_ldt */
330 PTR compat_sys_adjtimex
331 PTR sys_mprotect /* 4125 */
332 PTR compat_sys_sigprocmask
333 PTR sys_ni_syscall /* was creat_module */
335 PTR sys_delete_module
336 PTR sys_ni_syscall /* 4130, get_kernel_syms */
341 PTR sys_sysfs /* 4135 */
342 PTR sys_32_personality
343 PTR sys_ni_syscall /* for afs_syscall */
346 PTR sys_32_llseek /* 4140 */
347 PTR compat_sys_getdents
348 PTR compat_sys_select
351 PTR compat_sys_readv /* 4145 */
352 PTR compat_sys_writev
356 PTR sys_ni_syscall /* 4150 */
359 PTR compat_sys_sysctl
361 PTR sys_munlock /* 4155 */
364 PTR sys_sched_setparam
365 PTR sys_sched_getparam
366 PTR sys_sched_setscheduler /* 4160 */
367 PTR sys_sched_getscheduler
369 PTR sys_sched_get_priority_max
370 PTR sys_sched_get_priority_min
371 PTR sys_32_sched_rr_get_interval /* 4165 */
372 PTR compat_sys_nanosleep
376 PTR sys_connect /* 4170 */
381 PTR compat_sys_recv /* 4175 */
382 PTR compat_sys_recvfrom
383 PTR compat_sys_recvmsg
385 PTR compat_sys_sendmsg
386 PTR sys_sendto /* 4180 */
387 PTR compat_sys_setsockopt
391 PTR sys_setresuid /* 4185 */
393 PTR sys_ni_syscall /* was query_module */
395 PTR compat_sys_nfsservctl
396 PTR sys_setresgid /* 4190 */
399 PTR sys32_rt_sigreturn
400 PTR sys_32_rt_sigaction
401 PTR sys_32_rt_sigprocmask /* 4195 */
402 PTR sys_32_rt_sigpending
403 PTR compat_sys_rt_sigtimedwait
404 PTR sys_32_rt_sigqueueinfo
405 PTR sys32_rt_sigsuspend
406 PTR sys_32_pread /* 4200 */
411 PTR sys_capset /* 4205 */
412 PTR sys32_sigaltstack
416 PTR sys_mips_mmap2 /* 4210 */
417 PTR sys_32_truncate64
418 PTR sys_32_ftruncate64
421 PTR sys_newfstat /* 4215 */
426 PTR compat_sys_fcntl64 /* 4220 */
431 PTR sys_lsetxattr /* 4225 */
436 PTR sys_listxattr /* 4230 */
441 PTR sys_fremovexattr /* 4235 */
445 PTR compat_sys_sched_setaffinity
446 PTR compat_sys_sched_getaffinity /* 4240 */
447 PTR compat_sys_io_setup
449 PTR compat_sys_io_getevents
450 PTR compat_sys_io_submit
451 PTR sys_io_cancel /* 4245 */
453 PTR sys32_lookup_dcookie
456 PTR sys_epoll_wait /* 4250 */
457 PTR sys_remap_file_pages
458 PTR sys_set_tid_address
459 PTR sys_restart_syscall
460 PTR sys32_fadvise64_64
461 PTR compat_sys_statfs64 /* 4255 */
462 PTR compat_sys_fstatfs64
463 PTR compat_sys_timer_create
464 PTR compat_sys_timer_settime
465 PTR compat_sys_timer_gettime
466 PTR sys_timer_getoverrun /* 4260 */
468 PTR compat_sys_clock_settime
469 PTR compat_sys_clock_gettime
470 PTR compat_sys_clock_getres
471 PTR compat_sys_clock_nanosleep /* 4265 */
473 PTR compat_sys_utimes
474 PTR sys_ni_syscall /* sys_mbind */
475 PTR sys_ni_syscall /* sys_get_mempolicy */
476 PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
477 PTR compat_sys_mq_open
479 PTR compat_sys_mq_timedsend
480 PTR compat_sys_mq_timedreceive
481 PTR compat_sys_mq_notify /* 4275 */
482 PTR compat_sys_mq_getsetattr
483 PTR sys_ni_syscall /* sys_vserver */
485 PTR sys_ni_syscall /* available, was setaltroot */
486 PTR sys_add_key /* 4280 */
489 PTR sys_set_thread_area
491 PTR sys_inotify_add_watch /* 4285 */
492 PTR sys_inotify_rm_watch
493 PTR sys_migrate_pages
494 PTR compat_sys_openat
496 PTR sys_mknodat /* 4290 */
498 PTR compat_sys_futimesat
501 PTR sys_renameat /* 4295 */
506 PTR sys_faccessat /* 4300 */
507 PTR compat_sys_pselect6
511 PTR sys32_sync_file_range /* 4305 */
513 PTR compat_sys_vmsplice
514 PTR compat_sys_move_pages
515 PTR compat_sys_set_robust_list
516 PTR compat_sys_get_robust_list /* 4310 */
517 PTR compat_sys_kexec_load
519 PTR compat_sys_epoll_pwait
521 PTR sys_ioprio_get /* 4315 */
522 PTR compat_sys_utimensat
523 PTR compat_sys_signalfd
524 PTR sys_ni_syscall /* was timerfd */
526 PTR sys32_fallocate /* 4320 */
527 PTR sys_timerfd_create
528 PTR compat_sys_timerfd_gettime
529 PTR compat_sys_timerfd_settime
530 PTR compat_sys_signalfd4
531 PTR sys_eventfd2 /* 4325 */
532 PTR sys_epoll_create1
535 PTR sys_inotify_init1
536 PTR compat_sys_preadv /* 4330 */
537 PTR compat_sys_pwritev
538 PTR compat_sys_rt_tgsigqueueinfo
539 PTR sys_perf_event_open
541 PTR compat_sys_recvmmsg /* 4335 */
542 PTR sys_fanotify_init
543 PTR sys_32_fanotify_mark
545 PTR sys_name_to_handle_at
546 PTR compat_sys_open_by_handle_at /* 4340 */
547 PTR compat_sys_clock_adjtime
550 .size sys_call_table,.-sys_call_table