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 sd a3, PT_R26(sp) # save a3 for syscall restarting
58 * More than four arguments. Try to deal with it by copying the
59 * stack arguments from the user stack to the kernel stack.
62 * We intentionally keep the kernel stack a little below the top of
63 * userspace so we don't have to do a slower byte accurate check here.
65 ld t0, PT_R29(sp) # get old user stack pointer
69 load_a4: lw a4, 16(t0) # argument #5 from usp
70 load_a5: lw a5, 20(t0) # argument #6 from usp
71 load_a6: lw a6, 24(t0) # argument #7 from usp
72 load_a7: lw a7, 28(t0) # argument #8 from usp
75 .section __ex_table,"a"
76 PTR load_a4, bad_stack_a4
77 PTR load_a5, bad_stack_a5
78 PTR load_a6, bad_stack_a6
79 PTR load_a7, bad_stack_a7
82 li t1, _TIF_WORK_SYSCALL_ENTRY
83 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
85 bnez t0, trace_a_syscall
88 dsll t0, v0, 3 # offset into table
89 ld t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0)
91 jalr t2 # Do The Real Thing (TM)
93 li t0, -EMAXERRNO - 1 # error?
95 sd t0, PT_R7(sp) # set error flag
98 ld t1, PT_R2(sp) # syscall number
100 sd t1, PT_R0(sp) # save it for syscall restarting
101 1: sd v0, PT_R2(sp) # result
104 j syscall_exit_partial
106 /* ------------------------------------------------------------------------ */
110 sd a4, PT_R8(sp) # Save argument registers
113 sd a7, PT_R11(sp) # For indirect syscalls
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 ld a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
131 1: jal syscall_trace_enter
133 bltz v0, 1f # seccomp failed? Skip syscall
136 ld v0, PT_R2(sp) # Restore syscall (maybe modified)
137 ld a0, PT_R4(sp) # Restore argument registers
144 ld a7, PT_R11(sp) # For indirect syscalls
146 dsubu t0, v0, __NR_O32_Linux # check (new) syscall number
147 sltiu t0, t0, __NR_O32_Linux_syscalls + 1
148 beqz t0, not_o32_scall
154 /* ------------------------------------------------------------------------ */
157 * The stackpointer for a call with more than 4 arguments is bad.
162 li t0, 1 # set error flag
184 * This is not an o32 compatibility syscall, pass it on
185 * to the 64-bit syscall handlers.
187 #ifdef CONFIG_MIPS32_N32
195 subu t0, a0, __NR_O32_Linux # check syscall number
196 sltiu v0, t0, __NR_O32_Linux_syscalls + 1
197 beqz t0, einval # do not recurse
200 ld t2, sys32_call_table(t1) # syscall routine
202 move a0, a1 # shift argument registers
212 einval: li v0, -ENOSYS
217 .type sys32_call_table,@object
218 EXPORT(sys32_call_table)
219 PTR sys32_syscall /* 4000 */
224 PTR compat_sys_open /* 4005 */
229 PTR sys_unlink /* 4010 */
230 PTR compat_sys_execve
234 PTR sys_chmod /* 4015 */
237 PTR sys_ni_syscall /* was sys_stat */
239 PTR sys_getpid /* 4020 */
244 PTR compat_sys_stime /* 4025 */
245 PTR compat_sys_ptrace
247 PTR sys_ni_syscall /* was sys_fstat */
249 PTR compat_sys_utime /* 4030 */
254 PTR sys_ni_syscall /* 4035 */
259 PTR sys_rmdir /* 4040 */
264 PTR sys_brk /* 4045 */
267 PTR sys_ni_syscall /* was signal 2 */
269 PTR sys_getegid /* 4050 */
274 PTR compat_sys_fcntl /* 4055 */
279 PTR sys_umask /* 4060 */
284 PTR sys_getpgrp /* 4065 */
289 PTR sys_setreuid /* 4070 */
292 PTR compat_sys_sigpending
294 PTR compat_sys_setrlimit /* 4075 */
295 PTR compat_sys_getrlimit
296 PTR compat_sys_getrusage
297 PTR compat_sys_gettimeofday
298 PTR compat_sys_settimeofday
299 PTR sys_getgroups /* 4080 */
301 PTR sys_ni_syscall /* old_select */
303 PTR sys_ni_syscall /* was sys_lstat */
304 PTR sys_readlink /* 4085 */
308 PTR compat_sys_old_readdir
309 PTR sys_mips_mmap /* 4090 */
311 PTR compat_sys_truncate
312 PTR compat_sys_ftruncate
314 PTR sys_fchown /* 4095 */
318 PTR compat_sys_statfs
319 PTR compat_sys_fstatfs /* 4100 */
320 PTR sys_ni_syscall /* sys_ioperm */
321 PTR compat_sys_socketcall
323 PTR compat_sys_setitimer
324 PTR compat_sys_getitimer /* 4105 */
325 PTR compat_sys_newstat
326 PTR compat_sys_newlstat
327 PTR compat_sys_newfstat
329 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
331 PTR sys_ni_syscall /* was sys_idle */
332 PTR sys_ni_syscall /* sys_vm86 */
334 PTR sys_swapoff /* 4115 */
335 PTR compat_sys_sysinfo
339 PTR __sys_clone /* 4120 */
340 PTR sys_setdomainname
342 PTR sys_ni_syscall /* sys_modify_ldt */
343 PTR compat_sys_adjtimex
344 PTR sys_mprotect /* 4125 */
345 PTR compat_sys_sigprocmask
346 PTR sys_ni_syscall /* was creat_module */
348 PTR sys_delete_module
349 PTR sys_ni_syscall /* 4130, get_kernel_syms */
354 PTR sys_sysfs /* 4135 */
355 PTR sys_32_personality
356 PTR sys_ni_syscall /* for afs_syscall */
359 PTR sys_32_llseek /* 4140 */
360 PTR compat_sys_getdents
361 PTR compat_sys_select
364 PTR compat_sys_readv /* 4145 */
365 PTR compat_sys_writev
369 PTR sys_ni_syscall /* 4150 */
372 PTR compat_sys_sysctl
374 PTR sys_munlock /* 4155 */
377 PTR sys_sched_setparam
378 PTR sys_sched_getparam
379 PTR sys_sched_setscheduler /* 4160 */
380 PTR sys_sched_getscheduler
382 PTR sys_sched_get_priority_max
383 PTR sys_sched_get_priority_min
384 PTR compat_sys_sched_rr_get_interval /* 4165 */
385 PTR compat_sys_nanosleep
389 PTR sys_connect /* 4170 */
392 PTR compat_sys_getsockopt
394 PTR compat_sys_recv /* 4175 */
395 PTR compat_sys_recvfrom
396 PTR compat_sys_recvmsg
398 PTR compat_sys_sendmsg
399 PTR sys_sendto /* 4180 */
400 PTR compat_sys_setsockopt
404 PTR sys_setresuid /* 4185 */
406 PTR sys_ni_syscall /* was query_module */
408 PTR sys_ni_syscall /* was nfsservctl */
409 PTR sys_setresgid /* 4190 */
412 PTR sys32_rt_sigreturn
413 PTR compat_sys_rt_sigaction
414 PTR compat_sys_rt_sigprocmask /* 4195 */
415 PTR compat_sys_rt_sigpending
416 PTR compat_sys_rt_sigtimedwait
417 PTR compat_sys_rt_sigqueueinfo
418 PTR compat_sys_rt_sigsuspend
419 PTR sys_32_pread /* 4200 */
424 PTR sys_capset /* 4205 */
425 PTR compat_sys_sigaltstack
426 PTR compat_sys_sendfile
429 PTR sys_mips_mmap2 /* 4210 */
430 PTR sys_32_truncate64
431 PTR sys_32_ftruncate64
434 PTR sys_newfstat /* 4215 */
439 PTR compat_sys_fcntl64 /* 4220 */
444 PTR sys_lsetxattr /* 4225 */
449 PTR sys_listxattr /* 4230 */
454 PTR sys_fremovexattr /* 4235 */
458 PTR compat_sys_sched_setaffinity
459 PTR compat_sys_sched_getaffinity /* 4240 */
460 PTR compat_sys_io_setup
462 PTR compat_sys_io_getevents
463 PTR compat_sys_io_submit
464 PTR sys_io_cancel /* 4245 */
466 PTR compat_sys_lookup_dcookie
469 PTR sys_epoll_wait /* 4250 */
470 PTR sys_remap_file_pages
471 PTR sys_set_tid_address
472 PTR sys_restart_syscall
473 PTR sys32_fadvise64_64
474 PTR compat_sys_statfs64 /* 4255 */
475 PTR compat_sys_fstatfs64
476 PTR compat_sys_timer_create
477 PTR compat_sys_timer_settime
478 PTR compat_sys_timer_gettime
479 PTR sys_timer_getoverrun /* 4260 */
481 PTR compat_sys_clock_settime
482 PTR compat_sys_clock_gettime
483 PTR compat_sys_clock_getres
484 PTR compat_sys_clock_nanosleep /* 4265 */
486 PTR compat_sys_utimes
488 PTR compat_sys_get_mempolicy
489 PTR compat_sys_set_mempolicy /* 4270 */
490 PTR compat_sys_mq_open
492 PTR compat_sys_mq_timedsend
493 PTR compat_sys_mq_timedreceive
494 PTR compat_sys_mq_notify /* 4275 */
495 PTR compat_sys_mq_getsetattr
496 PTR sys_ni_syscall /* sys_vserver */
497 PTR compat_sys_waitid
498 PTR sys_ni_syscall /* available, was setaltroot */
499 PTR sys_add_key /* 4280 */
501 PTR compat_sys_keyctl
502 PTR sys_set_thread_area
504 PTR sys_inotify_add_watch /* 4285 */
505 PTR sys_inotify_rm_watch
506 PTR compat_sys_migrate_pages
507 PTR compat_sys_openat
509 PTR sys_mknodat /* 4290 */
511 PTR compat_sys_futimesat
514 PTR sys_renameat /* 4295 */
519 PTR sys_faccessat /* 4300 */
520 PTR compat_sys_pselect6
524 PTR sys32_sync_file_range /* 4305 */
526 PTR compat_sys_vmsplice
527 PTR compat_sys_move_pages
528 PTR compat_sys_set_robust_list
529 PTR compat_sys_get_robust_list /* 4310 */
530 PTR compat_sys_kexec_load
532 PTR compat_sys_epoll_pwait
534 PTR sys_ioprio_get /* 4315 */
535 PTR compat_sys_utimensat
536 PTR compat_sys_signalfd
537 PTR sys_ni_syscall /* was timerfd */
539 PTR sys32_fallocate /* 4320 */
540 PTR sys_timerfd_create
541 PTR compat_sys_timerfd_gettime
542 PTR compat_sys_timerfd_settime
543 PTR compat_sys_signalfd4
544 PTR sys_eventfd2 /* 4325 */
545 PTR sys_epoll_create1
548 PTR sys_inotify_init1
549 PTR compat_sys_preadv /* 4330 */
550 PTR compat_sys_pwritev
551 PTR compat_sys_rt_tgsigqueueinfo
552 PTR sys_perf_event_open
554 PTR compat_sys_recvmmsg /* 4335 */
555 PTR sys_fanotify_init
556 PTR compat_sys_fanotify_mark
558 PTR sys_name_to_handle_at
559 PTR compat_sys_open_by_handle_at /* 4340 */
560 PTR compat_sys_clock_adjtime
562 PTR compat_sys_sendmmsg
564 PTR compat_sys_process_vm_readv /* 4345 */
565 PTR compat_sys_process_vm_writev
568 PTR sys_sched_setattr
569 PTR sys_sched_getattr /* 4350 */
574 PTR sys_bpf /* 4355 */
575 PTR compat_sys_execveat
579 PTR sys_copy_file_range /* 4360 */
580 PTR compat_sys_preadv2
581 PTR compat_sys_pwritev2
582 PTR sys_pkey_mprotect
584 PTR sys_pkey_free /* 4365 */
587 PTR compat_sys_io_pgetevents
588 .size sys32_call_table,.-sys32_call_table