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, (sys32_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 load_a4: lw a4, 16(t0) # argument #5 from usp
73 load_a5: lw a5, 20(t0) # argument #6 from usp
74 load_a6: lw a6, 24(t0) # argument #7 from usp
75 load_a7: lw a7, 28(t0) # argument #8 from usp
78 .section __ex_table,"a"
79 PTR load_a4, bad_stack_a4
80 PTR load_a5, bad_stack_a5
81 PTR load_a6, bad_stack_a6
82 PTR load_a7, bad_stack_a7
85 li t1, _TIF_WORK_SYSCALL_ENTRY
86 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
88 bnez t0, trace_a_syscall
90 jalr t2 # Do The Real Thing (TM)
92 li t0, -EMAXERRNO - 1 # error?
94 sd t0, PT_R7(sp) # set error flag
97 ld t1, PT_R2(sp) # syscall number
99 sd t1, PT_R0(sp) # save it for syscall restarting
100 1: sd v0, PT_R2(sp) # result
103 j syscall_exit_partial
105 /* ------------------------------------------------------------------------ */
109 sd a4, PT_R8(sp) # Save argument registers
112 sd a7, PT_R11(sp) # For indirect syscalls
114 move s0, t2 # Save syscall pointer
117 * absolute syscall number is in v0 unless we called syscall(__NR_###)
118 * where the real syscall number is in a0
119 * note: NR_syscall is the first O32 syscall but the macro is
120 * only defined when compiling with -mabi=32 (CONFIG_32BIT)
121 * therefore __NR_O32_Linux is used (4000)
125 subu t1, v0, __NR_O32_Linux
127 bnez t1, 1f /* __NR_syscall at offset 0 */
128 lw a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
131 1: jal syscall_trace_enter
133 bltz v0, 2f # seccomp failed? Skip syscall
137 ld a0, PT_R4(sp) # Restore argument registers
144 ld a7, PT_R11(sp) # For indirect syscalls
147 li t0, -EMAXERRNO - 1 # error?
149 sd t0, PT_R7(sp) # set error flag
152 ld t1, PT_R2(sp) # syscall number
154 sd t1, PT_R0(sp) # save it for syscall restarting
155 1: sd v0, PT_R2(sp) # result
159 /* ------------------------------------------------------------------------ */
162 * The stackpointer for a call with more than 4 arguments is bad.
167 li t0, 1 # set error flag
189 * This is not an o32 compatibility syscall, pass it on
190 * to the 64-bit syscall handlers.
192 #ifdef CONFIG_MIPS32_N32
200 subu t0, a0, __NR_O32_Linux # check syscall number
201 sltiu v0, t0, __NR_O32_Linux_syscalls + 1
202 beqz t0, einval # do not recurse
205 ld t2, sys32_call_table(t1) # syscall routine
206 sd a0, PT_R2(sp) # call routine directly on restart
208 move a0, a1 # shift argument registers
215 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
216 sd a1, PT_R5(sp) # syscalls expect them there
219 sd a3, PT_R26(sp) # update a3 for syscall restarting
223 einval: li v0, -ENOSYS
228 .type sys32_call_table,@object
229 EXPORT(sys32_call_table)
230 PTR sys32_syscall /* 4000 */
235 PTR compat_sys_open /* 4005 */
240 PTR sys_unlink /* 4010 */
241 PTR compat_sys_execve
245 PTR sys_chmod /* 4015 */
248 PTR sys_ni_syscall /* was sys_stat */
250 PTR sys_getpid /* 4020 */
255 PTR compat_sys_stime /* 4025 */
256 PTR compat_sys_ptrace
258 PTR sys_ni_syscall /* was sys_fstat */
260 PTR compat_sys_utime /* 4030 */
265 PTR sys_ni_syscall /* 4035 */
270 PTR sys_rmdir /* 4040 */
275 PTR sys_brk /* 4045 */
278 PTR sys_ni_syscall /* was signal 2 */
280 PTR sys_getegid /* 4050 */
285 PTR compat_sys_fcntl /* 4055 */
290 PTR sys_umask /* 4060 */
295 PTR sys_getpgrp /* 4065 */
300 PTR sys_setreuid /* 4070 */
303 PTR compat_sys_sigpending
305 PTR compat_sys_setrlimit /* 4075 */
306 PTR compat_sys_getrlimit
307 PTR compat_sys_getrusage
308 PTR compat_sys_gettimeofday
309 PTR compat_sys_settimeofday
310 PTR sys_getgroups /* 4080 */
312 PTR sys_ni_syscall /* old_select */
314 PTR sys_ni_syscall /* was sys_lstat */
315 PTR sys_readlink /* 4085 */
319 PTR compat_sys_old_readdir
320 PTR sys_mips_mmap /* 4090 */
322 PTR compat_sys_truncate
323 PTR compat_sys_ftruncate
325 PTR sys_fchown /* 4095 */
329 PTR compat_sys_statfs
330 PTR compat_sys_fstatfs /* 4100 */
331 PTR sys_ni_syscall /* sys_ioperm */
332 PTR compat_sys_socketcall
334 PTR compat_sys_setitimer
335 PTR compat_sys_getitimer /* 4105 */
336 PTR compat_sys_newstat
337 PTR compat_sys_newlstat
338 PTR compat_sys_newfstat
340 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
342 PTR sys_ni_syscall /* was sys_idle */
343 PTR sys_ni_syscall /* sys_vm86 */
345 PTR sys_swapoff /* 4115 */
346 PTR compat_sys_sysinfo
350 PTR __sys_clone /* 4120 */
351 PTR sys_setdomainname
353 PTR sys_ni_syscall /* sys_modify_ldt */
354 PTR compat_sys_adjtimex
355 PTR sys_mprotect /* 4125 */
356 PTR compat_sys_sigprocmask
357 PTR sys_ni_syscall /* was creat_module */
359 PTR sys_delete_module
360 PTR sys_ni_syscall /* 4130, get_kernel_syms */
365 PTR sys_sysfs /* 4135 */
366 PTR sys_32_personality
367 PTR sys_ni_syscall /* for afs_syscall */
370 PTR sys_32_llseek /* 4140 */
371 PTR compat_sys_getdents
372 PTR compat_sys_select
375 PTR compat_sys_readv /* 4145 */
376 PTR compat_sys_writev
380 PTR sys_ni_syscall /* 4150 */
383 PTR compat_sys_sysctl
385 PTR sys_munlock /* 4155 */
388 PTR sys_sched_setparam
389 PTR sys_sched_getparam
390 PTR sys_sched_setscheduler /* 4160 */
391 PTR sys_sched_getscheduler
393 PTR sys_sched_get_priority_max
394 PTR sys_sched_get_priority_min
395 PTR compat_sys_sched_rr_get_interval /* 4165 */
396 PTR compat_sys_nanosleep
400 PTR sys_connect /* 4170 */
403 PTR compat_sys_getsockopt
405 PTR compat_sys_recv /* 4175 */
406 PTR compat_sys_recvfrom
407 PTR compat_sys_recvmsg
409 PTR compat_sys_sendmsg
410 PTR sys_sendto /* 4180 */
411 PTR compat_sys_setsockopt
415 PTR sys_setresuid /* 4185 */
417 PTR sys_ni_syscall /* was query_module */
419 PTR sys_ni_syscall /* was nfsservctl */
420 PTR sys_setresgid /* 4190 */
423 PTR sys32_rt_sigreturn
424 PTR compat_sys_rt_sigaction
425 PTR compat_sys_rt_sigprocmask /* 4195 */
426 PTR compat_sys_rt_sigpending
427 PTR compat_sys_rt_sigtimedwait
428 PTR compat_sys_rt_sigqueueinfo
429 PTR compat_sys_rt_sigsuspend
430 PTR sys_32_pread /* 4200 */
435 PTR sys_capset /* 4205 */
436 PTR compat_sys_sigaltstack
437 PTR compat_sys_sendfile
440 PTR sys_mips_mmap2 /* 4210 */
441 PTR sys_32_truncate64
442 PTR sys_32_ftruncate64
445 PTR sys_newfstat /* 4215 */
450 PTR compat_sys_fcntl64 /* 4220 */
455 PTR sys_lsetxattr /* 4225 */
460 PTR sys_listxattr /* 4230 */
465 PTR sys_fremovexattr /* 4235 */
469 PTR compat_sys_sched_setaffinity
470 PTR compat_sys_sched_getaffinity /* 4240 */
471 PTR compat_sys_io_setup
473 PTR compat_sys_io_getevents
474 PTR compat_sys_io_submit
475 PTR sys_io_cancel /* 4245 */
477 PTR compat_sys_lookup_dcookie
480 PTR sys_epoll_wait /* 4250 */
481 PTR sys_remap_file_pages
482 PTR sys_set_tid_address
483 PTR sys_restart_syscall
484 PTR sys32_fadvise64_64
485 PTR compat_sys_statfs64 /* 4255 */
486 PTR compat_sys_fstatfs64
487 PTR compat_sys_timer_create
488 PTR compat_sys_timer_settime
489 PTR compat_sys_timer_gettime
490 PTR sys_timer_getoverrun /* 4260 */
492 PTR compat_sys_clock_settime
493 PTR compat_sys_clock_gettime
494 PTR compat_sys_clock_getres
495 PTR compat_sys_clock_nanosleep /* 4265 */
497 PTR compat_sys_utimes
499 PTR compat_sys_get_mempolicy
500 PTR compat_sys_set_mempolicy /* 4270 */
501 PTR compat_sys_mq_open
503 PTR compat_sys_mq_timedsend
504 PTR compat_sys_mq_timedreceive
505 PTR compat_sys_mq_notify /* 4275 */
506 PTR compat_sys_mq_getsetattr
507 PTR sys_ni_syscall /* sys_vserver */
508 PTR compat_sys_waitid
509 PTR sys_ni_syscall /* available, was setaltroot */
510 PTR sys_add_key /* 4280 */
513 PTR sys_set_thread_area
515 PTR sys_inotify_add_watch /* 4285 */
516 PTR sys_inotify_rm_watch
517 PTR compat_sys_migrate_pages
518 PTR compat_sys_openat
520 PTR sys_mknodat /* 4290 */
522 PTR compat_sys_futimesat
525 PTR sys_renameat /* 4295 */
530 PTR sys_faccessat /* 4300 */
531 PTR compat_sys_pselect6
535 PTR sys32_sync_file_range /* 4305 */
537 PTR compat_sys_vmsplice
538 PTR compat_sys_move_pages
539 PTR compat_sys_set_robust_list
540 PTR compat_sys_get_robust_list /* 4310 */
541 PTR compat_sys_kexec_load
543 PTR compat_sys_epoll_pwait
545 PTR sys_ioprio_get /* 4315 */
546 PTR compat_sys_utimensat
547 PTR compat_sys_signalfd
548 PTR sys_ni_syscall /* was timerfd */
550 PTR sys32_fallocate /* 4320 */
551 PTR sys_timerfd_create
552 PTR compat_sys_timerfd_gettime
553 PTR compat_sys_timerfd_settime
554 PTR compat_sys_signalfd4
555 PTR sys_eventfd2 /* 4325 */
556 PTR sys_epoll_create1
559 PTR sys_inotify_init1
560 PTR compat_sys_preadv /* 4330 */
561 PTR compat_sys_pwritev
562 PTR compat_sys_rt_tgsigqueueinfo
563 PTR sys_perf_event_open
565 PTR compat_sys_recvmmsg /* 4335 */
566 PTR sys_fanotify_init
567 PTR compat_sys_fanotify_mark
569 PTR sys_name_to_handle_at
570 PTR compat_sys_open_by_handle_at /* 4340 */
571 PTR compat_sys_clock_adjtime
573 PTR compat_sys_sendmmsg
575 PTR compat_sys_process_vm_readv /* 4345 */
576 PTR compat_sys_process_vm_writev
579 PTR sys_sched_setattr
580 PTR sys_sched_getattr /* 4350 */
585 PTR sys_bpf /* 4355 */
586 PTR compat_sys_execveat
587 .size sys32_call_table,.-sys32_call_table