| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 |
| 4 | * for more details. |
| 5 | * |
| 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 |
| 10 | * |
| 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 |
| 14 | * here for now. |
| 15 | */ |
| 16 | #include <linux/config.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <asm/asm.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> |
| 26 | |
| 27 | .align 5 |
| 28 | NESTED(handle_sys, PT_SIZE, sp) |
| 29 | .set noat |
| 30 | SAVE_SOME |
| 31 | STI |
| 32 | .set at |
| 33 | ld t1, PT_EPC(sp) # skip syscall on return |
| 34 | |
| 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 |
| 38 | sd t1, PT_EPC(sp) |
| 39 | beqz t0, not_o32_scall |
| 40 | #if 0 |
| 41 | SAVE_ALL |
| 42 | move a1, v0 |
| 43 | PRINT("Scall %ld\n") |
| 44 | RESTORE_ALL |
| 45 | #endif |
| 46 | |
| 47 | /* We don't want to stumble over broken sign extensions from |
| 48 | userland. O32 does never use the upper half. */ |
| 49 | sll a0, a0, 0 |
| 50 | sll a1, a1, 0 |
| 51 | sll a2, a2, 0 |
| 52 | sll a3, a3, 0 |
| 53 | |
| 54 | dsll t0, v0, 3 # offset into table |
| 55 | ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0) |
| 56 | |
| 57 | sd a3, PT_R26(sp) # save a3 for syscall restarting |
| 58 | |
| 59 | /* |
| 60 | * More than four arguments. Try to deal with it by copying the |
| 61 | * stack arguments from the user stack to the kernel stack. |
| 62 | * This Sucks (TM). |
| 63 | * |
| 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. |
| 66 | */ |
| 67 | ld t0, PT_R29(sp) # get old user stack pointer |
| 68 | daddu t1, t0, 32 |
| 69 | bltz t1, bad_stack |
| 70 | |
| 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) |
| 75 | |
| 76 | .section __ex_table,"a" |
| 77 | PTR 1b, bad_stack |
| 78 | PTR 2b, bad_stack |
| 79 | PTR 3b, bad_stack |
| 80 | PTR 4b, bad_stack |
| 81 | .previous |
| 82 | |
| 83 | li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT |
| 84 | LONG_L t0, TI_FLAGS($28) # syscall tracing enabled? |
| 85 | and t0, t1, t0 |
| 86 | bnez t0, trace_a_syscall |
| 87 | |
| 88 | jalr t2 # Do The Real Thing (TM) |
| 89 | |
| 90 | li t0, -EMAXERRNO - 1 # error? |
| 91 | sltu t0, t0, v0 |
| 92 | sd t0, PT_R7(sp) # set error flag |
| 93 | beqz t0, 1f |
| 94 | |
| 95 | dnegu v0 # error |
| 96 | sd v0, PT_R0(sp) # flag for syscall restarting |
| 97 | 1: sd v0, PT_R2(sp) # result |
| 98 | |
| 99 | o32_syscall_exit: |
| 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 |
| 105 | and t0, a2, t0 |
| 106 | bnez t0, o32_syscall_exit_work |
| 107 | |
| 108 | j restore_partial |
| 109 | |
| 110 | o32_syscall_exit_work: |
| 111 | j syscall_exit_work_partial |
| 112 | |
| 113 | /* ------------------------------------------------------------------------ */ |
| 114 | |
| 115 | trace_a_syscall: |
| 116 | SAVE_STATIC |
| 117 | sd a4, PT_R8(sp) # Save argument registers |
| 118 | sd a5, PT_R9(sp) |
| 119 | sd a6, PT_R10(sp) |
| 120 | sd a7, PT_R11(sp) # For indirect syscalls |
| 121 | |
| 122 | move s0, t2 # Save syscall pointer |
| 123 | move a0, sp |
| 124 | li a1, 0 |
| 125 | jal do_syscall_trace |
| 126 | |
| 127 | ld a0, PT_R4(sp) # Restore argument registers |
| 128 | ld a1, PT_R5(sp) |
| 129 | ld a2, PT_R6(sp) |
| 130 | ld a3, PT_R7(sp) |
| 131 | ld a4, PT_R8(sp) |
| 132 | ld a5, PT_R9(sp) |
| 133 | ld a6, PT_R10(sp) |
| 134 | ld a7, PT_R11(sp) # For indirect syscalls |
| 135 | jalr s0 |
| 136 | |
| 137 | li t0, -EMAXERRNO - 1 # error? |
| 138 | sltu t0, t0, v0 |
| 139 | sd t0, PT_R7(sp) # set error flag |
| 140 | beqz t0, 1f |
| 141 | |
| 142 | dnegu v0 # error |
| 143 | sd v0, PT_R0(sp) # set flag for syscall restarting |
| 144 | 1: sd v0, PT_R2(sp) # result |
| 145 | |
| 146 | j syscall_exit |
| 147 | |
| 148 | /* ------------------------------------------------------------------------ */ |
| 149 | |
| 150 | /* |
| 151 | * The stackpointer for a call with more than 4 arguments is bad. |
| 152 | */ |
| 153 | bad_stack: |
| 154 | dnegu v0 # error |
| 155 | sd v0, PT_R0(sp) |
| 156 | sd v0, PT_R2(sp) |
| 157 | li t0, 1 # set error flag |
| 158 | sd t0, PT_R7(sp) |
| 159 | j o32_syscall_exit |
| 160 | |
| 161 | not_o32_scall: |
| 162 | /* |
| 163 | * This is not an o32 compatibility syscall, pass it on |
| 164 | * to the 64-bit syscall handlers. |
| 165 | */ |
| 166 | #ifdef CONFIG_MIPS32_N32 |
| 167 | j handle_sysn32 |
| 168 | #else |
| 169 | j handle_sys64 |
| 170 | #endif |
| 171 | END(handle_sys) |
| 172 | |
| 173 | LEAF(sys32_syscall) |
| 174 | sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1 |
| 175 | beqz v0, einval |
| 176 | |
| 177 | dsll v0, a0, 3 |
| 178 | ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0) |
| 179 | |
| 180 | li v1, 4000 # indirect syscall number |
| 181 | beq a0, v1, einval # do not recurse |
| 182 | |
| 183 | move a0, a1 # shift argument registers |
| 184 | move a1, a2 |
| 185 | move a2, a3 |
| 186 | move a3, a4 |
| 187 | move a4, a5 |
| 188 | move a5, a6 |
| 189 | move a6, a7 |
| 190 | sd a0, PT_R4(sp) # ... and push back a0 - a3, some |
| 191 | sd a1, PT_R5(sp) # syscalls expect them there |
| 192 | sd a2, PT_R6(sp) |
| 193 | sd a3, PT_R7(sp) |
| 194 | sd a3, PT_R26(sp) # update a3 for syscall restarting |
| 195 | jr t2 |
| 196 | /* Unreached */ |
| 197 | |
| 198 | einval: li v0, -EINVAL |
| 199 | jr ra |
| 200 | END(sys32_syscall) |
| 201 | |
| 202 | .align 3 |
| 203 | .type sys_call_table,@object |
| 204 | sys_call_table: |
| 205 | PTR sys32_syscall /* 4000 */ |
| 206 | PTR sys_exit |
| 207 | PTR sys_fork |
| 208 | PTR sys_read |
| 209 | PTR sys_write |
| 210 | PTR sys_open /* 4005 */ |
| 211 | PTR sys_close |
| 212 | PTR sys_waitpid |
| 213 | PTR sys_creat |
| 214 | PTR sys_link |
| 215 | PTR sys_unlink /* 4010 */ |
| 216 | PTR sys32_execve |
| 217 | PTR sys_chdir |
| 218 | PTR compat_sys_time |
| 219 | PTR sys_mknod |
| 220 | PTR sys_chmod /* 4015 */ |
| 221 | PTR sys_lchown |
| 222 | PTR sys_ni_syscall |
| 223 | PTR sys_ni_syscall /* was sys_stat */ |
| 224 | PTR sys_lseek |
| 225 | PTR sys_getpid /* 4020 */ |
| 226 | PTR sys_mount |
| 227 | PTR sys_oldumount |
| 228 | PTR sys_setuid |
| 229 | PTR sys_getuid |
| 230 | PTR compat_sys_stime /* 4025 */ |
| 231 | PTR sys32_ptrace |
| 232 | PTR sys_alarm |
| 233 | PTR sys_ni_syscall /* was sys_fstat */ |
| 234 | PTR sys_pause |
| 235 | PTR compat_sys_utime /* 4030 */ |
| 236 | PTR sys_ni_syscall |
| 237 | PTR sys_ni_syscall |
| 238 | PTR sys_access |
| 239 | PTR sys_nice |
| 240 | PTR sys_ni_syscall /* 4035 */ |
| 241 | PTR sys_sync |
| 242 | PTR sys_kill |
| 243 | PTR sys_rename |
| 244 | PTR sys_mkdir |
| 245 | PTR sys_rmdir /* 4040 */ |
| 246 | PTR sys_dup |
| 247 | PTR sys_pipe |
| 248 | PTR compat_sys_times |
| 249 | PTR sys_ni_syscall |
| 250 | PTR sys_brk /* 4045 */ |
| 251 | PTR sys_setgid |
| 252 | PTR sys_getgid |
| 253 | PTR sys_ni_syscall /* was signal 2 */ |
| 254 | PTR sys_geteuid |
| 255 | PTR sys_getegid /* 4050 */ |
| 256 | PTR sys_acct |
| 257 | PTR sys_umount |
| 258 | PTR sys_ni_syscall |
| 259 | PTR compat_sys_ioctl |
| 260 | PTR compat_sys_fcntl /* 4055 */ |
| 261 | PTR sys_ni_syscall |
| 262 | PTR sys_setpgid |
| 263 | PTR sys_ni_syscall |
| 264 | PTR sys_olduname |
| 265 | PTR sys_umask /* 4060 */ |
| 266 | PTR sys_chroot |
| 267 | PTR sys32_ustat |
| 268 | PTR sys_dup2 |
| 269 | PTR sys_getppid |
| 270 | PTR sys_getpgrp /* 4065 */ |
| 271 | PTR sys_setsid |
| 272 | PTR sys32_sigaction |
| 273 | PTR sys_sgetmask |
| 274 | PTR sys_ssetmask |
| 275 | PTR sys_setreuid /* 4070 */ |
| 276 | PTR sys_setregid |
| 277 | PTR sys32_sigsuspend |
| 278 | PTR compat_sys_sigpending |
| 279 | PTR sys_sethostname |
| 280 | PTR compat_sys_setrlimit /* 4075 */ |
| 281 | PTR compat_sys_getrlimit |
| 282 | PTR compat_sys_getrusage |
| 283 | PTR sys32_gettimeofday |
| 284 | PTR sys32_settimeofday |
| 285 | PTR sys_getgroups /* 4080 */ |
| 286 | PTR sys_setgroups |
| 287 | PTR sys_ni_syscall /* old_select */ |
| 288 | PTR sys_symlink |
| 289 | PTR sys_ni_syscall /* was sys_lstat */ |
| 290 | PTR sys_readlink /* 4085 */ |
| 291 | PTR sys_uselib |
| 292 | PTR sys_swapon |
| 293 | PTR sys_reboot |
| 294 | PTR sys32_readdir |
| 295 | PTR old_mmap /* 4090 */ |
| 296 | PTR sys_munmap |
| 297 | PTR sys_truncate |
| 298 | PTR sys_ftruncate |
| 299 | PTR sys_fchmod |
| 300 | PTR sys_fchown /* 4095 */ |
| 301 | PTR sys_getpriority |
| 302 | PTR sys_setpriority |
| 303 | PTR sys_ni_syscall |
| 304 | PTR compat_sys_statfs |
| 305 | PTR compat_sys_fstatfs /* 4100 */ |
| 306 | PTR sys_ni_syscall /* sys_ioperm */ |
| 307 | PTR sys32_socketcall |
| 308 | PTR sys_syslog |
| 309 | PTR compat_sys_setitimer |
| 310 | PTR compat_sys_getitimer /* 4105 */ |
| 311 | PTR compat_sys_newstat |
| 312 | PTR compat_sys_newlstat |
| 313 | PTR compat_sys_newfstat |
| 314 | PTR sys_uname |
| 315 | PTR sys_ni_syscall /* sys_ioperm *//* 4110 */ |
| 316 | PTR sys_vhangup |
| 317 | PTR sys_ni_syscall /* was sys_idle */ |
| 318 | PTR sys_ni_syscall /* sys_vm86 */ |
| 319 | PTR sys32_wait4 |
| 320 | PTR sys_swapoff /* 4115 */ |
| 321 | PTR sys32_sysinfo |
| 322 | PTR sys32_ipc |
| 323 | PTR sys_fsync |
| 324 | PTR sys32_sigreturn |
| 325 | PTR sys_clone /* 4120 */ |
| 326 | PTR sys_setdomainname |
| 327 | PTR sys32_newuname |
| 328 | PTR sys_ni_syscall /* sys_modify_ldt */ |
| 329 | PTR sys32_adjtimex |
| 330 | PTR sys_mprotect /* 4125 */ |
| 331 | PTR compat_sys_sigprocmask |
| 332 | PTR sys_ni_syscall /* was creat_module */ |
| 333 | PTR sys_init_module |
| 334 | PTR sys_delete_module |
| 335 | PTR sys_ni_syscall /* 4130, get_kernel_syms */ |
| 336 | PTR sys_quotactl |
| 337 | PTR sys_getpgid |
| 338 | PTR sys_fchdir |
| 339 | PTR sys_bdflush |
| 340 | PTR sys_sysfs /* 4135 */ |
| 341 | PTR sys32_personality |
| 342 | PTR sys_ni_syscall /* for afs_syscall */ |
| 343 | PTR sys_setfsuid |
| 344 | PTR sys_setfsgid |
| 345 | PTR sys32_llseek /* 4140 */ |
| 346 | PTR sys32_getdents |
| 347 | PTR compat_sys_select |
| 348 | PTR sys_flock |
| 349 | PTR sys_msync |
| 350 | PTR compat_sys_readv /* 4145 */ |
| 351 | PTR compat_sys_writev |
| 352 | PTR sys_cacheflush |
| 353 | PTR sys_cachectl |
| 354 | PTR sys_sysmips |
| 355 | PTR sys_ni_syscall /* 4150 */ |
| 356 | PTR sys_getsid |
| 357 | PTR sys_fdatasync |
| 358 | PTR sys32_sysctl |
| 359 | PTR sys_mlock |
| 360 | PTR sys_munlock /* 4155 */ |
| 361 | PTR sys_mlockall |
| 362 | PTR sys_munlockall |
| 363 | PTR sys_sched_setparam |
| 364 | PTR sys_sched_getparam |
| 365 | PTR sys_sched_setscheduler /* 4160 */ |
| 366 | PTR sys_sched_getscheduler |
| 367 | PTR sys_sched_yield |
| 368 | PTR sys_sched_get_priority_max |
| 369 | PTR sys_sched_get_priority_min |
| 370 | PTR sys32_sched_rr_get_interval /* 4165 */ |
| 371 | PTR compat_sys_nanosleep |
| 372 | PTR sys_mremap |
| 373 | PTR sys_accept |
| 374 | PTR sys_bind |
| 375 | PTR sys_connect /* 4170 */ |
| 376 | PTR sys_getpeername |
| 377 | PTR sys_getsockname |
| 378 | PTR sys_getsockopt |
| 379 | PTR sys_listen |
| 380 | PTR sys_recv /* 4175 */ |
| 381 | PTR sys_recvfrom |
| 382 | PTR compat_sys_recvmsg |
| 383 | PTR sys_send |
| 384 | PTR compat_sys_sendmsg |
| 385 | PTR sys_sendto /* 4180 */ |
| 386 | PTR compat_sys_setsockopt |
| 387 | PTR sys_shutdown |
| 388 | PTR sys_socket |
| 389 | PTR sys_socketpair |
| 390 | PTR sys_setresuid /* 4185 */ |
| 391 | PTR sys_getresuid |
| 392 | PTR sys_ni_syscall /* was query_module */ |
| 393 | PTR sys_poll |
| 394 | PTR sys_nfsservctl |
| 395 | PTR sys_setresgid /* 4190 */ |
| 396 | PTR sys_getresgid |
| 397 | PTR sys_prctl |
| 398 | PTR sys32_rt_sigreturn |
| 399 | PTR sys32_rt_sigaction |
| 400 | PTR sys32_rt_sigprocmask /* 4195 */ |
| 401 | PTR sys32_rt_sigpending |
| 402 | PTR compat_sys_rt_sigtimedwait |
| 403 | PTR sys32_rt_sigqueueinfo |
| 404 | PTR sys32_rt_sigsuspend |
| 405 | PTR sys32_pread /* 4200 */ |
| 406 | PTR sys32_pwrite |
| 407 | PTR sys_chown |
| 408 | PTR sys_getcwd |
| 409 | PTR sys_capget |
| 410 | PTR sys_capset /* 4205 */ |
| 411 | PTR sys32_sigaltstack |
| 412 | PTR sys32_sendfile |
| 413 | PTR sys_ni_syscall |
| 414 | PTR sys_ni_syscall |
| 415 | PTR sys32_mmap2 /* 4210 */ |
| 416 | PTR sys32_truncate64 |
| 417 | PTR sys32_ftruncate64 |
| 418 | PTR sys_newstat |
| 419 | PTR sys_newlstat |
| 420 | PTR sys_newfstat /* 4215 */ |
| 421 | PTR sys_pivot_root |
| 422 | PTR sys_mincore |
| 423 | PTR sys_madvise |
| 424 | PTR sys_getdents64 |
| 425 | PTR compat_sys_fcntl64 /* 4220 */ |
| 426 | PTR sys_ni_syscall |
| 427 | PTR sys_gettid |
| 428 | PTR sys32_readahead |
| 429 | PTR sys_setxattr |
| 430 | PTR sys_lsetxattr /* 4225 */ |
| 431 | PTR sys_fsetxattr |
| 432 | PTR sys_getxattr |
| 433 | PTR sys_lgetxattr |
| 434 | PTR sys_fgetxattr |
| 435 | PTR sys_listxattr /* 4230 */ |
| 436 | PTR sys_llistxattr |
| 437 | PTR sys_flistxattr |
| 438 | PTR sys_removexattr |
| 439 | PTR sys_lremovexattr |
| 440 | PTR sys_fremovexattr /* 4235 */ |
| 441 | PTR sys_tkill |
| 442 | PTR sys_sendfile64 |
| 443 | PTR compat_sys_futex |
| 444 | PTR compat_sys_sched_setaffinity |
| 445 | PTR compat_sys_sched_getaffinity /* 4240 */ |
| 446 | PTR sys_io_setup |
| 447 | PTR sys_io_destroy |
| 448 | PTR sys_io_getevents |
| 449 | PTR sys_io_submit |
| 450 | PTR sys_io_cancel /* 4245 */ |
| 451 | PTR sys_exit_group |
| 452 | PTR sys_lookup_dcookie |
| 453 | PTR sys_epoll_create |
| 454 | PTR sys_epoll_ctl |
| 455 | PTR sys_epoll_wait /* 4250 */ |
| 456 | PTR sys_remap_file_pages |
| 457 | PTR sys_set_tid_address |
| 458 | PTR sys_restart_syscall |
| 459 | PTR sys_fadvise64_64 |
| 460 | PTR compat_sys_statfs64 /* 4255 */ |
| 461 | PTR compat_sys_fstatfs64 |
| 462 | PTR sys_timer_create |
| 463 | PTR compat_sys_timer_settime |
| 464 | PTR compat_sys_timer_gettime |
| 465 | PTR sys_timer_getoverrun /* 4260 */ |
| 466 | PTR sys_timer_delete |
| 467 | PTR compat_sys_clock_settime |
| 468 | PTR compat_sys_clock_gettime |
| 469 | PTR compat_sys_clock_getres |
| 470 | PTR compat_sys_clock_nanosleep /* 4265 */ |
| 471 | PTR sys_tgkill |
| 472 | PTR compat_sys_utimes |
| 473 | PTR sys_ni_syscall /* sys_mbind */ |
| 474 | PTR sys_ni_syscall /* sys_get_mempolicy */ |
| 475 | PTR sys_ni_syscall /* 4270 sys_set_mempolicy */ |
| 476 | PTR compat_sys_mq_open |
| 477 | PTR sys_mq_unlink |
| 478 | PTR compat_sys_mq_timedsend |
| 479 | PTR compat_sys_mq_timedreceive |
| 480 | PTR compat_sys_mq_notify /* 4275 */ |
| 481 | PTR compat_sys_mq_getsetattr |
| 482 | PTR sys_ni_syscall /* sys_vserver */ |
| 483 | PTR sys_waitid |
| 484 | PTR sys_ni_syscall /* available, was setaltroot */ |
| 485 | PTR sys_add_key /* 4280 */ |
| 486 | PTR sys_request_key |
| 487 | PTR sys_keyctl |
| 488 | .size sys_call_table,.-sys_call_table |