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
97 sd v0, PT_R0(sp) # flag for syscall restarting
98 1: sd v0, PT_R2(sp) # result
101 local_irq_disable # make need_resched and
102 # signals dont change between
103 # sampling and return
104 LONG_L a2, TI_FLAGS($28)
105 li t0, _TIF_ALLWORK_MASK
107 bnez t0, o32_syscall_exit_work
111 o32_syscall_exit_work:
112 j syscall_exit_work_partial
114 /* ------------------------------------------------------------------------ */
118 sd a4, PT_R8(sp) # Save argument registers
121 sd a7, PT_R11(sp) # For indirect syscalls
123 move s0, t2 # Save syscall pointer
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
146 sd v0, PT_R0(sp) # set flag for syscall restarting
147 1: sd v0, PT_R2(sp) # result
151 /* ------------------------------------------------------------------------ */
154 * 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 sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
181 ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)
183 li v1, 4000 # indirect syscall number
184 beq a0, v1, einval # do not recurse
186 move a0, a1 # shift argument registers
193 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
194 sd a1, PT_R5(sp) # syscalls expect them there
197 sd a3, PT_R26(sp) # update a3 for syscall restarting
201 einval: li v0, -EINVAL
206 .type sys_call_table,@object
208 PTR sys32_syscall /* 4000 */
213 PTR compat_sys_open /* 4005 */
218 PTR sys_unlink /* 4010 */
223 PTR sys_chmod /* 4015 */
226 PTR sys_ni_syscall /* was sys_stat */
228 PTR sys_getpid /* 4020 */
233 PTR compat_sys_stime /* 4025 */
236 PTR sys_ni_syscall /* was sys_fstat */
238 PTR compat_sys_utime /* 4030 */
243 PTR sys_ni_syscall /* 4035 */
248 PTR sys_rmdir /* 4040 */
253 PTR sys_brk /* 4045 */
256 PTR sys_ni_syscall /* was signal 2 */
258 PTR sys_getegid /* 4050 */
263 PTR compat_sys_fcntl /* 4055 */
268 PTR sys_umask /* 4060 */
273 PTR sys_getpgrp /* 4065 */
278 PTR sys_setreuid /* 4070 */
281 PTR compat_sys_sigpending
283 PTR compat_sys_setrlimit /* 4075 */
284 PTR compat_sys_getrlimit
285 PTR compat_sys_getrusage
286 PTR sys32_gettimeofday
287 PTR sys32_settimeofday
288 PTR sys_getgroups /* 4080 */
290 PTR sys_ni_syscall /* old_select */
292 PTR sys_ni_syscall /* was sys_lstat */
293 PTR sys_readlink /* 4085 */
297 PTR compat_sys_old_readdir
298 PTR old_mmap /* 4090 */
303 PTR sys_fchown /* 4095 */
307 PTR compat_sys_statfs
308 PTR compat_sys_fstatfs /* 4100 */
309 PTR sys_ni_syscall /* sys_ioperm */
312 PTR compat_sys_setitimer
313 PTR compat_sys_getitimer /* 4105 */
314 PTR compat_sys_newstat
315 PTR compat_sys_newlstat
316 PTR compat_sys_newfstat
318 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
320 PTR sys_ni_syscall /* was sys_idle */
321 PTR sys_ni_syscall /* sys_vm86 */
323 PTR sys_swapoff /* 4115 */
328 PTR sys32_clone /* 4120 */
329 PTR sys_setdomainname
331 PTR sys_ni_syscall /* sys_modify_ldt */
332 PTR compat_sys_adjtimex
333 PTR sys_mprotect /* 4125 */
334 PTR compat_sys_sigprocmask
335 PTR sys_ni_syscall /* was creat_module */
337 PTR sys_delete_module
338 PTR sys_ni_syscall /* 4130, get_kernel_syms */
343 PTR sys_sysfs /* 4135 */
344 PTR sys32_personality
345 PTR sys_ni_syscall /* for afs_syscall */
348 PTR sys32_llseek /* 4140 */
349 PTR compat_sys_getdents
350 PTR compat_sys_select
353 PTR compat_sys_readv /* 4145 */
354 PTR compat_sys_writev
358 PTR sys_ni_syscall /* 4150 */
363 PTR sys_munlock /* 4155 */
366 PTR sys_sched_setparam
367 PTR sys_sched_getparam
368 PTR sys_sched_setscheduler /* 4160 */
369 PTR sys_sched_getscheduler
371 PTR sys_sched_get_priority_max
372 PTR sys_sched_get_priority_min
373 PTR sys32_sched_rr_get_interval /* 4165 */
374 PTR compat_sys_nanosleep
378 PTR sys_connect /* 4170 */
383 PTR sys_recv /* 4175 */
385 PTR compat_sys_recvmsg
387 PTR compat_sys_sendmsg
388 PTR sys_sendto /* 4180 */
389 PTR compat_sys_setsockopt
393 PTR sys_setresuid /* 4185 */
395 PTR sys_ni_syscall /* was query_module */
397 PTR compat_sys_nfsservctl
398 PTR sys_setresgid /* 4190 */
401 PTR sys32_rt_sigreturn
402 PTR sys32_rt_sigaction
403 PTR sys32_rt_sigprocmask /* 4195 */
404 PTR sys32_rt_sigpending
405 PTR compat_sys_rt_sigtimedwait
406 PTR sys32_rt_sigqueueinfo
407 PTR sys32_rt_sigsuspend
408 PTR sys32_pread /* 4200 */
413 PTR sys_capset /* 4205 */
414 PTR sys32_sigaltstack
418 PTR sys32_mmap2 /* 4210 */
420 PTR sys32_ftruncate64
423 PTR sys_newfstat /* 4215 */
428 PTR compat_sys_fcntl64 /* 4220 */
433 PTR sys_lsetxattr /* 4225 */
438 PTR sys_listxattr /* 4230 */
443 PTR sys_fremovexattr /* 4235 */
447 PTR compat_sys_sched_setaffinity
448 PTR compat_sys_sched_getaffinity /* 4240 */
453 PTR sys_io_cancel /* 4245 */
455 PTR sys_lookup_dcookie
458 PTR sys_epoll_wait /* 4250 */
459 PTR sys_remap_file_pages
460 PTR sys_set_tid_address
461 PTR sys_restart_syscall
463 PTR compat_sys_statfs64 /* 4255 */
464 PTR compat_sys_fstatfs64
465 PTR sys32_timer_create
466 PTR compat_sys_timer_settime
467 PTR compat_sys_timer_gettime
468 PTR sys_timer_getoverrun /* 4260 */
470 PTR compat_sys_clock_settime
471 PTR compat_sys_clock_gettime
472 PTR compat_sys_clock_getres
473 PTR compat_sys_clock_nanosleep /* 4265 */
475 PTR compat_sys_utimes
476 PTR sys_ni_syscall /* sys_mbind */
477 PTR sys_ni_syscall /* sys_get_mempolicy */
478 PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
479 PTR compat_sys_mq_open
481 PTR compat_sys_mq_timedsend
482 PTR compat_sys_mq_timedreceive
483 PTR compat_sys_mq_notify /* 4275 */
484 PTR compat_sys_mq_getsetattr
485 PTR sys_ni_syscall /* sys_vserver */
487 PTR sys_ni_syscall /* available, was setaltroot */
488 PTR sys_add_key /* 4280 */
491 PTR sys_set_thread_area
493 PTR sys_inotify_add_watch /* 4285 */
494 PTR sys_inotify_rm_watch
495 PTR sys_migrate_pages
496 PTR compat_sys_openat
498 PTR sys_mknodat /* 4290 */
500 PTR compat_sys_futimesat
503 PTR sys_renameat /* 4295 */
508 PTR sys_faccessat /* 4300 */
509 PTR compat_sys_pselect6
513 PTR sys32_sync_file_range /* 4305 */
516 PTR compat_sys_move_pages
517 PTR compat_sys_set_robust_list
518 PTR compat_sys_get_robust_list /* 4310 */
519 PTR compat_sys_kexec_load
522 .size sys_call_table,.-sys_call_table