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/config.h>
17 #include <linux/errno.h>
19 #include <asm/asmmacro.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)
33 ld t1, PT_EPC(sp) # skip syscall on return
35 dsubu t0, v0, __NR_O32_Linux # check syscall number
36 sltiu t0, t0, __NR_O32_Linux_syscalls + 1
37 daddiu t1, 4 # skip to next instruction
39 beqz t0, not_o32_scall
47 /* We don't want to stumble over broken sign extensions from
48 userland. O32 does never use the upper half. */
54 dsll t0, v0, 3 # offset into table
55 ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0)
57 sd a3, PT_R26(sp) # save a3 for syscall restarting
60 * More than four arguments. Try to deal with it by copying the
61 * stack arguments from the user stack to the kernel stack.
64 * We intentionally keep the kernel stack a little below the top of
65 * userspace so we don't have to do a slower byte accurate check here.
67 ld t0, PT_R29(sp) # get old user stack pointer
71 1: lw a4, 16(t0) # argument #5 from usp
72 2: lw a5, 20(t0) # argument #6 from usp
73 3: lw a6, 24(t0) # argument #7 from usp
74 4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls)
76 .section __ex_table,"a"
83 li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
84 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
86 bnez t0, trace_a_syscall
88 jalr t2 # Do The Real Thing (TM)
90 li t0, -EMAXERRNO - 1 # error?
92 sd t0, PT_R7(sp) # set error flag
96 sd v0, PT_R0(sp) # flag for syscall restarting
97 1: sd v0, PT_R2(sp) # result
100 local_irq_disable # make need_resched and
101 # signals dont change between
102 # sampling and return
103 LONG_L a2, TI_FLAGS($28)
104 li t0, _TIF_ALLWORK_MASK
106 bnez t0, o32_syscall_exit_work
110 o32_syscall_exit_work:
111 j syscall_exit_work_partial
113 /* ------------------------------------------------------------------------ */
117 sd a4, PT_R8(sp) # Save argument registers
120 sd a7, PT_R11(sp) # For indirect syscalls
122 move s0, t2 # Save syscall pointer
129 ld a0, PT_R4(sp) # Restore argument registers
136 ld a7, PT_R11(sp) # For indirect syscalls
139 li t0, -EMAXERRNO - 1 # error?
141 sd t0, PT_R7(sp) # set error flag
145 sd v0, PT_R0(sp) # set flag for syscall restarting
146 1: sd v0, PT_R2(sp) # result
150 /* ------------------------------------------------------------------------ */
153 * The stackpointer for a call with more than 4 arguments is bad.
159 li t0, 1 # set error flag
165 * This is not an o32 compatibility syscall, pass it on
166 * to the 64-bit syscall handlers.
168 #ifdef CONFIG_MIPS32_N32
176 sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
180 ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)
182 li v1, 4000 # indirect syscall number
183 beq a0, v1, einval # do not recurse
185 move a0, a1 # shift argument registers
192 sd a0, PT_R4(sp) # ... and push back a0 - a3, some
193 sd a1, PT_R5(sp) # syscalls expect them there
196 sd a3, PT_R26(sp) # update a3 for syscall restarting
200 einval: li v0, -EINVAL
205 .type sys_call_table,@object
207 PTR sys32_syscall /* 4000 */
212 PTR compat_sys_open /* 4005 */
217 PTR sys_unlink /* 4010 */
222 PTR sys_chmod /* 4015 */
225 PTR sys_ni_syscall /* was sys_stat */
227 PTR sys_getpid /* 4020 */
232 PTR compat_sys_stime /* 4025 */
235 PTR sys_ni_syscall /* was sys_fstat */
237 PTR compat_sys_utime /* 4030 */
242 PTR sys_ni_syscall /* 4035 */
247 PTR sys_rmdir /* 4040 */
252 PTR sys_brk /* 4045 */
255 PTR sys_ni_syscall /* was signal 2 */
257 PTR sys_getegid /* 4050 */
262 PTR compat_sys_fcntl /* 4055 */
267 PTR sys_umask /* 4060 */
272 PTR sys_getpgrp /* 4065 */
277 PTR sys_setreuid /* 4070 */
280 PTR compat_sys_sigpending
282 PTR compat_sys_setrlimit /* 4075 */
283 PTR compat_sys_getrlimit
284 PTR compat_sys_getrusage
285 PTR sys32_gettimeofday
286 PTR sys32_settimeofday
287 PTR sys_getgroups /* 4080 */
289 PTR sys_ni_syscall /* old_select */
291 PTR sys_ni_syscall /* was sys_lstat */
292 PTR sys_readlink /* 4085 */
296 PTR compat_sys_old_readdir
297 PTR old_mmap /* 4090 */
302 PTR sys_fchown /* 4095 */
306 PTR compat_sys_statfs
307 PTR compat_sys_fstatfs /* 4100 */
308 PTR sys_ni_syscall /* sys_ioperm */
311 PTR compat_sys_setitimer
312 PTR compat_sys_getitimer /* 4105 */
313 PTR compat_sys_newstat
314 PTR compat_sys_newlstat
315 PTR compat_sys_newfstat
317 PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
319 PTR sys_ni_syscall /* was sys_idle */
320 PTR sys_ni_syscall /* sys_vm86 */
322 PTR sys_swapoff /* 4115 */
327 PTR sys32_clone /* 4120 */
328 PTR sys_setdomainname
330 PTR sys_ni_syscall /* sys_modify_ldt */
331 PTR compat_sys_adjtimex
332 PTR sys_mprotect /* 4125 */
333 PTR compat_sys_sigprocmask
334 PTR sys_ni_syscall /* was creat_module */
336 PTR sys_delete_module
337 PTR sys_ni_syscall /* 4130, get_kernel_syms */
342 PTR sys_sysfs /* 4135 */
343 PTR sys32_personality
344 PTR sys_ni_syscall /* for afs_syscall */
347 PTR sys32_llseek /* 4140 */
348 PTR compat_sys_getdents
349 PTR compat_sys_select
352 PTR compat_sys_readv /* 4145 */
353 PTR compat_sys_writev
357 PTR sys_ni_syscall /* 4150 */
362 PTR sys_munlock /* 4155 */
365 PTR sys_sched_setparam
366 PTR sys_sched_getparam
367 PTR sys_sched_setscheduler /* 4160 */
368 PTR sys_sched_getscheduler
370 PTR sys_sched_get_priority_max
371 PTR sys_sched_get_priority_min
372 PTR sys32_sched_rr_get_interval /* 4165 */
373 PTR compat_sys_nanosleep
377 PTR sys_connect /* 4170 */
382 PTR sys_recv /* 4175 */
384 PTR compat_sys_recvmsg
386 PTR compat_sys_sendmsg
387 PTR sys_sendto /* 4180 */
388 PTR compat_sys_setsockopt
392 PTR sys_setresuid /* 4185 */
394 PTR sys_ni_syscall /* was query_module */
396 PTR compat_sys_nfsservctl
397 PTR sys_setresgid /* 4190 */
400 PTR sys32_rt_sigreturn
401 PTR sys32_rt_sigaction
402 PTR sys32_rt_sigprocmask /* 4195 */
403 PTR sys32_rt_sigpending
404 PTR compat_sys_rt_sigtimedwait
405 PTR sys32_rt_sigqueueinfo
406 PTR sys32_rt_sigsuspend
407 PTR sys32_pread /* 4200 */
412 PTR sys_capset /* 4205 */
413 PTR sys32_sigaltstack
417 PTR sys32_mmap2 /* 4210 */
419 PTR sys32_ftruncate64
422 PTR sys_newfstat /* 4215 */
427 PTR compat_sys_fcntl64 /* 4220 */
432 PTR sys_lsetxattr /* 4225 */
437 PTR sys_listxattr /* 4230 */
442 PTR sys_fremovexattr /* 4235 */
446 PTR compat_sys_sched_setaffinity
447 PTR compat_sys_sched_getaffinity /* 4240 */
452 PTR sys_io_cancel /* 4245 */
454 PTR sys_lookup_dcookie
457 PTR sys_epoll_wait /* 4250 */
458 PTR sys_remap_file_pages
459 PTR sys_set_tid_address
460 PTR sys_restart_syscall
462 PTR compat_sys_statfs64 /* 4255 */
463 PTR compat_sys_fstatfs64
464 PTR sys32_timer_create
465 PTR compat_sys_timer_settime
466 PTR compat_sys_timer_gettime
467 PTR sys_timer_getoverrun /* 4260 */
469 PTR compat_sys_clock_settime
470 PTR compat_sys_clock_gettime
471 PTR compat_sys_clock_getres
472 PTR compat_sys_clock_nanosleep /* 4265 */
474 PTR compat_sys_utimes
475 PTR sys_ni_syscall /* sys_mbind */
476 PTR sys_ni_syscall /* sys_get_mempolicy */
477 PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
478 PTR compat_sys_mq_open
480 PTR compat_sys_mq_timedsend
481 PTR compat_sys_mq_timedreceive
482 PTR compat_sys_mq_notify /* 4275 */
483 PTR compat_sys_mq_getsetattr
484 PTR sys_ni_syscall /* sys_vserver */
486 PTR sys_ni_syscall /* available, was setaltroot */
487 PTR sys_add_key /* 4280 */
490 PTR sys_set_thread_area
492 PTR sys_inotify_add_watch /* 4285 */
493 PTR sys_inotify_rm_watch
494 PTR sys_migrate_pages
495 PTR compat_sys_openat
497 PTR sys_mknodat /* 4290 */
499 PTR compat_sys_futimesat
500 PTR compat_sys_newfstatat
502 PTR sys_renameat /* 4295 */
507 PTR sys_faccessat /* 4300 */
512 PTR sys32_sync_file_range /* 4305 */
513 .size sys_call_table,.-sys_call_table