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001 /* Copyright (C) 2005 David Decotigny 001 /* Copyright (C) 2005 David Decotigny 002 002 003 This program is free software; you can redi 003 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU Genera 004 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundatio 005 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any lat 006 of the License, or (at your option) any later version. 007 007 008 This program is distributed in the hope tha 008 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the 009 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details 011 GNU General Public License for more details. 012 012 013 You should have received a copy of the GNU 013 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to t 014 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 3 015 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 016 USA. 017 */ 017 */ 018 #include <sos/thread.h> 018 #include <sos/thread.h> 019 #include <sos/kmalloc.h> 019 #include <sos/kmalloc.h> 020 #include <sos/klibc.h> 020 #include <sos/klibc.h> 021 #include <drivers/bochs.h> 021 #include <drivers/bochs.h> >> 022 #include <hwcore/paging.h> >> 023 #include <sos/physmem.h> >> 024 #include <sos/umem_vmm.h> >> 025 #include <drivers/zero.h> >> 026 #include <drivers/mem.h> >> 027 #include <sos/binfmt_elf32.h> 022 028 023 #include <hwcore/cpu_context.h> 029 #include <hwcore/cpu_context.h> 024 #include <sos/uaccess.h> 030 #include <sos/uaccess.h> 025 #include "syscall.h" 031 #include "syscall.h" 026 032 >> 033 /** >> 034 * THE syscall entry point >> 035 */ >> 036 sos_ret_t sos_do_syscall(int syscall_id, >> 037 const struct sos_cpu_state *user_ctxt) >> 038 { >> 039 sos_ret_t retval; >> 040 >> 041 switch(syscall_id) >> 042 { >> 043 case SOS_SYSCALL_ID_EXIT: >> 044 { >> 045 unsigned int status; >> 046 >> 047 retval = sos_syscall_get1arg(user_ctxt, & status); >> 048 if (SOS_OK != retval) >> 049 break; >> 050 sos_thread_exit(); >> 051 retval = -SOS_EFATAL; /* Not reached */ >> 052 } >> 053 break; >> 054 >> 055 case SOS_SYSCALL_ID_FORK: >> 056 { >> 057 struct sos_thread *cur_thr, *new_thr; >> 058 struct sos_process *new_proc; >> 059 >> 060 cur_thr = sos_thread_get_current(); >> 061 >> 062 /* Duplicate the current process (and its address space) */ >> 063 new_proc = sos_process_create(NULL, TRUE); >> 064 if (! new_proc) >> 065 { >> 066 retval = -SOS_ENOMEM; >> 067 break; >> 068 } >> 069 >> 070 /* Create *the* thread in this new processs, copy of the >> 071 current user thread (same registers, EXCEPT eax which is >> 072 set to 0) */ >> 073 new_thr = >> 074 sos_duplicate_user_thread(NULL, new_proc, >> 075 cur_thr, >> 076 user_ctxt, >> 077 0); >> 078 if (! new_thr) >> 079 { >> 080 sos_process_unref(new_proc); >> 081 retval = -SOS_ENOMEM; >> 082 break; >> 083 } >> 084 >> 085 sos_process_unref(new_proc); >> 086 >> 087 /* Return to the "parent" thread with a value different from >> 088 0. Unix says it should be the "PID" of the child. We don't >> 089 have such a "PID" notion for now */ >> 090 retval = (sos_ui32_t)new_proc; >> 091 } >> 092 break; >> 093 >> 094 case SOS_SYSCALL_ID_EXEC: >> 095 { >> 096 struct sos_thread *cur_thr, *new_thr; >> 097 struct sos_process * proc; >> 098 struct sos_umem_vmm_as *new_as; >> 099 sos_uaddr_t user_str, ustack, start_uaddr; >> 100 sos_size_t len; >> 101 char * str; >> 102 >> 103 cur_thr = sos_thread_get_current(); >> 104 proc = cur_thr->process; >> 105 >> 106 /* Make sure the process has exactly 1 thread in it */ >> 107 if (sos_process_get_nb_threads(proc) != 1) >> 108 { >> 109 retval = -SOS_EBUSY; >> 110 break; >> 111 } >> 112 >> 113 /* Get the user arguments */ >> 114 retval = sos_syscall_get2args(user_ctxt, & user_str, & len); >> 115 if (SOS_OK != retval) >> 116 break; >> 117 >> 118 /* Copy the program name into kernel sppace */ >> 119 retval = sos_strndup_from_user(& str, user_str, len + 1, 0); >> 120 if (SOS_OK != retval) >> 121 { >> 122 break; >> 123 } >> 124 >> 125 /* Create a new empty address space to map the program */ >> 126 new_as = sos_umem_vmm_create_empty_as(proc); >> 127 if (! new_as) >> 128 { >> 129 sos_kfree((sos_vaddr_t)str); >> 130 retval = -SOS_ENOMEM; >> 131 break; >> 132 } >> 133 >> 134 /* Map the program in it */ >> 135 start_uaddr = sos_binfmt_elf32_map(new_as, str); >> 136 if (start_uaddr == (sos_uaddr_t)NULL) >> 137 { >> 138 sos_umem_vmm_delete_as(new_as); >> 139 sos_kfree((sos_vaddr_t)str); >> 140 retval = -SOS_ENOENT; >> 141 break; >> 142 } >> 143 >> 144 /* Allocate space for the user stack (8MB) */ >> 145 #define SOS_DEFAULT_USER_STACK_SIZE (8 << 20) >> 146 ustack = (SOS_PAGING_TOP_USER_ADDRESS - SOS_DEFAULT_USER_STACK_SIZE) >> 147 + 1; >> 148 retval = sos_dev_zero_map(new_as, &ustack, SOS_DEFAULT_USER_STACK_SIZE, >> 149 SOS_VM_MAP_PROT_READ | SOS_VM_MAP_PROT_WRITE, >> 150 /* PRIVATE */ 0); >> 151 if (SOS_OK != retval) >> 152 { >> 153 sos_umem_vmm_delete_as(new_as); >> 154 sos_kfree((sos_vaddr_t)str); >> 155 break; >> 156 } >> 157 >> 158 /* Now create the user thread */ >> 159 new_thr = sos_create_user_thread(NULL, >> 160 proc, >> 161 start_uaddr, >> 162 0, 0, >> 163 ustack + SOS_DEFAULT_USER_STACK_SIZE >> 164 - 4, >> 165 SOS_SCHED_PRIO_TS_LOWEST); >> 166 if (! new_thr) >> 167 { >> 168 sos_umem_vmm_delete_as(new_as); >> 169 sos_kfree((sos_vaddr_t)str); >> 170 retval = -SOS_ENOMEM; >> 171 break; >> 172 } >> 173 >> 174 sos_process_set_name(proc, str); >> 175 >> 176 /* Switch to this address space */ >> 177 retval = sos_process_set_address_space(proc, >> 178 new_as); >> 179 if (SOS_OK != retval) >> 180 { >> 181 sos_umem_vmm_delete_as(new_as); >> 182 sos_kfree((sos_vaddr_t)str); >> 183 break; >> 184 } >> 185 >> 186 /* The current thread must exit now */ >> 187 sos_kfree((sos_vaddr_t)str); >> 188 sos_thread_exit(); >> 189 retval = -SOS_EFATAL; >> 190 } >> 191 break; >> 192 >> 193 case SOS_SYSCALL_ID_MUNMAP: >> 194 { >> 195 sos_uaddr_t start_uaddr; >> 196 sos_size_t size; >> 197 struct sos_umem_vmm_as * my_as; >> 198 >> 199 my_as >> 200 = sos_process_get_address_space(sos_thread_get_current()->process); >> 201 >> 202 retval = sos_syscall_get2args(user_ctxt, >> 203 (unsigned int*)& start_uaddr, >> 204 (unsigned int*)& size); >> 205 if (SOS_OK != retval) >> 206 break; >> 207 >> 208 retval = sos_umem_vmm_unmap(my_as, start_uaddr, size); >> 209 } >> 210 break; >> 211 >> 212 case SOS_SYSCALL_ID_MPROTECT: >> 213 { >> 214 sos_uaddr_t start_uaddr; >> 215 sos_size_t size; >> 216 sos_ui32_t new_access_rights; >> 217 struct sos_umem_vmm_as * my_as; >> 218 >> 219 my_as >> 220 = sos_process_get_address_space(sos_thread_get_current()->process); >> 221 >> 222 retval = sos_syscall_get3args(user_ctxt, >> 223 (unsigned int*)& start_uaddr, >> 224 (unsigned int*)& size, >> 225 (unsigned int*)& new_access_rights); >> 226 if (SOS_OK != retval) >> 227 break; >> 228 >> 229 retval = sos_thread_prepare_user_space_access(NULL, (sos_vaddr_t)NULL); >> 230 if (SOS_OK != retval) >> 231 break; >> 232 >> 233 retval = sos_umem_vmm_chprot(my_as, start_uaddr, size, >> 234 new_access_rights); >> 235 >> 236 sos_thread_end_user_space_access(); >> 237 } >> 238 break; >> 239 >> 240 case SOS_SYSCALL_ID_MRESIZE: >> 241 { >> 242 sos_uaddr_t old_uaddr; >> 243 sos_size_t old_size; >> 244 sos_uaddr_t *uptr_new_uaddr; >> 245 sos_uaddr_t new_uaddr; >> 246 sos_size_t new_size; >> 247 sos_ui32_t flags; >> 248 struct sos_umem_vmm_as * my_as; >> 249 >> 250 my_as >> 251 = sos_process_get_address_space(sos_thread_get_current()->process); >> 252 >> 253 retval = sos_syscall_get5args(user_ctxt, >> 254 (unsigned int*)& old_uaddr, >> 255 (unsigned int*)& old_size, >> 256 (unsigned int*)& uptr_new_uaddr, >> 257 (unsigned int*)& new_size, >> 258 (unsigned int*)& flags); >> 259 if (SOS_OK != retval) >> 260 break; >> 261 >> 262 if (sizeof(new_uaddr) != sos_memcpy_from_user((sos_vaddr_t)& new_uaddr, >> 263 (sos_uaddr_t) >> 264 uptr_new_uaddr, >> 265 sizeof(new_uaddr))) >> 266 { >> 267 retval = -SOS_EFAULT; >> 268 break; >> 269 } >> 270 >> 271 retval = sos_thread_prepare_user_space_access(NULL, (sos_vaddr_t)NULL); >> 272 if (SOS_OK != retval) >> 273 break; >> 274 >> 275 retval = sos_umem_vmm_resize(my_as, old_uaddr, old_size, >> 276 & new_uaddr, new_size, flags); >> 277 sos_thread_end_user_space_access(); >> 278 if (SOS_OK != retval) >> 279 break; >> 280 >> 281 if (sizeof(new_uaddr) >> 282 == sos_memcpy_to_user((sos_uaddr_t)uptr_new_uaddr, >> 283 (sos_vaddr_t)&new_uaddr, >> 284 sizeof(new_uaddr))) >> 285 { >> 286 retval = -SOS_EFAULT; >> 287 break; >> 288 } >> 289 } >> 290 break; >> 291 >> 292 case SOS_SYSCALL_ID_NEW_THREAD: >> 293 { >> 294 sos_uaddr_t start_func; >> 295 sos_ui32_t start_arg1, start_arg2; >> 296 sos_size_t stack_size; >> 297 sos_uaddr_t stack_uaddr; >> 298 >> 299 struct sos_thread * new_thr; >> 300 struct sos_umem_vmm_as * my_as; >> 301 >> 302 my_as >> 303 = sos_process_get_address_space(sos_thread_get_current()->process); >> 304 >> 305 retval = sos_syscall_get4args(user_ctxt, >> 306 (unsigned int*)& start_func, >> 307 (unsigned int*)& start_arg1, >> 308 (unsigned int*)& start_arg2, >> 309 (unsigned int*)& stack_size); >> 310 if (SOS_OK != retval) >> 311 break; >> 312 >> 313 if (stack_size <= 0) >> 314 { >> 315 retval = -SOS_EINVAL; >> 316 break; >> 317 } >> 318 >> 319 /* Allocate the stack */ >> 320 stack_uaddr = 0; >> 321 stack_size = SOS_PAGE_ALIGN_SUP(stack_size); >> 322 retval = sos_dev_zero_map(my_as, & stack_uaddr, stack_size, >> 323 SOS_VM_MAP_PROT_READ | SOS_VM_MAP_PROT_WRITE, >> 324 /* PRIVATE */ 0); >> 325 if (SOS_OK != retval) >> 326 break; >> 327 >> 328 /* Now create the user thread */ >> 329 new_thr = sos_create_user_thread(NULL, >> 330 sos_thread_get_current()->process, >> 331 start_func, >> 332 start_arg1, >> 333 start_arg2, >> 334 stack_uaddr + stack_size - 4, >> 335 SOS_SCHED_PRIO_TS_LOWEST); >> 336 >> 337 if (! new_thr) >> 338 { >> 339 sos_umem_vmm_unmap(my_as, stack_uaddr, stack_size); >> 340 retval = -SOS_ENOMEM; >> 341 break; >> 342 } >> 343 >> 344 } >> 345 break; >> 346 >> 347 case SOS_SYSCALL_ID_NANOSLEEP: >> 348 { >> 349 struct sos_time delay; >> 350 >> 351 retval = sos_syscall_get2args(user_ctxt, >> 352 (unsigned int*)& delay.sec, >> 353 (unsigned int*)& delay.nanosec); >> 354 if (SOS_OK != retval) >> 355 break; >> 356 >> 357 retval = sos_thread_sleep(& delay); >> 358 } >> 359 break; >> 360 >> 361 case SOS_SYSCALL_ID_BRK: >> 362 { >> 363 sos_uaddr_t new_top_heap; >> 364 struct sos_umem_vmm_as * my_as; >> 365 >> 366 my_as >> 367 = sos_process_get_address_space(sos_thread_get_current()->process); >> 368 >> 369 retval = sos_syscall_get1arg(user_ctxt, >> 370 (unsigned int*)& new_top_heap); >> 371 if (SOS_OK != retval) >> 372 break; >> 373 >> 374 retval = sos_thread_prepare_user_space_access(NULL, (sos_vaddr_t)NULL); >> 375 if (SOS_OK != retval) >> 376 break; >> 377 >> 378 retval = sos_umem_vmm_brk(my_as, new_top_heap); >> 379 sos_thread_end_user_space_access(); >> 380 } >> 381 break; >> 382 >> 383 >> 384 /** >> 385 * File system interface >> 386 */ >> 387 case SOS_SYSCALL_ID_MOUNT: >> 388 { >> 389 sos_uaddr_t user_src; >> 390 sos_size_t srclen; >> 391 char * kernel_src = NULL; >> 392 sos_uaddr_t user_dst; >> 393 sos_size_t dstlen; >> 394 char * kernel_dst; >> 395 sos_ui32_t mountflags; >> 396 sos_uaddr_t user_fstype; >> 397 char * kernel_fstype; >> 398 sos_uaddr_t user_args; >> 399 char * kernel_args = NULL; >> 400 struct sos_process * proc; >> 401 >> 402 proc = sos_thread_get_current()->process; >> 403 retval = sos_syscall_get7args(user_ctxt, >> 404 (unsigned int*)& user_src, >> 405 (unsigned int*)& srclen, >> 406 (unsigned int*)& user_dst, >> 407 (unsigned int*)& dstlen, >> 408 (unsigned int*)& user_fstype, >> 409 (unsigned int*)& mountflags, >> 410 (unsigned int*)& user_args); >> 411 if (SOS_OK != retval) >> 412 break; >> 413 >> 414 if (user_src != (sos_uaddr_t)NULL) >> 415 { >> 416 retval = sos_strndup_from_user(&kernel_src, user_src, srclen, 0); >> 417 if (SOS_OK != retval) >> 418 break; >> 419 } >> 420 >> 421 retval = sos_strndup_from_user(&kernel_dst, user_dst, dstlen, 0); >> 422 if (SOS_OK != retval) >> 423 { >> 424 if (kernel_src) >> 425 sos_kfree((sos_vaddr_t)kernel_src); >> 426 break; >> 427 } >> 428 >> 429 retval = sos_strndup_from_user(& kernel_fstype, user_fstype, 256, 0); >> 430 if (SOS_OK != retval) >> 431 { >> 432 if (kernel_src) >> 433 sos_kfree((sos_vaddr_t)kernel_src); >> 434 sos_kfree((sos_vaddr_t)kernel_dst); >> 435 break; >> 436 } >> 437 >> 438 if (user_args != (sos_uaddr_t)NULL) >> 439 { >> 440 retval = sos_strndup_from_user(& kernel_args, user_args, 1024, 0); >> 441 if (SOS_OK != retval) >> 442 { >> 443 if (kernel_src) >> 444 sos_kfree((sos_vaddr_t)kernel_src); >> 445 sos_kfree((sos_vaddr_t)kernel_dst); >> 446 sos_kfree((sos_vaddr_t)kernel_fstype); >> 447 break; >> 448 } >> 449 } >> 450 >> 451 retval = sos_fs_mount(proc, kernel_src, srclen, >> 452 kernel_dst, dstlen, >> 453 kernel_fstype, >> 454 mountflags, >> 455 kernel_args, >> 456 NULL); >> 457 if (kernel_src) >> 458 sos_kfree((sos_vaddr_t)kernel_src); >> 459 sos_kfree((sos_vaddr_t)kernel_dst); >> 460 sos_kfree((sos_vaddr_t)kernel_fstype); >> 461 if (kernel_args) >> 462 sos_kfree((sos_vaddr_t)kernel_args); >> 463 } >> 464 break; >> 465 >> 466 case SOS_SYSCALL_ID_UMOUNT: >> 467 { >> 468 sos_uaddr_t user_str; >> 469 sos_size_t len; >> 470 char * path; >> 471 struct sos_process * proc; >> 472 >> 473 proc = sos_thread_get_current()->process; >> 474 retval = sos_syscall_get2args(user_ctxt, >> 475 (unsigned int*)& user_str, >> 476 (unsigned int*)& len); >> 477 if (SOS_OK != retval) >> 478 break; >> 479 >> 480 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 481 if (SOS_OK != retval) >> 482 break; >> 483 >> 484 retval = sos_fs_umount(proc, >> 485 path, len); >> 486 sos_kfree((sos_vaddr_t)path); >> 487 } >> 488 break; >> 489 >> 490 case SOS_SYSCALL_ID_SYNC: >> 491 { >> 492 sos_fs_sync_all_fs(); >> 493 retval = SOS_OK; >> 494 } >> 495 break; >> 496 >> 497 case SOS_SYSCALL_ID_VFSTAT64: >> 498 { >> 499 sos_uaddr_t user_str; >> 500 sos_size_t len; >> 501 sos_uaddr_t user_vfstat_struct; >> 502 struct sos_fs_statfs kernel_vfstat_struct; >> 503 char * path; >> 504 struct sos_process * proc; >> 505 >> 506 proc = sos_thread_get_current()->process; >> 507 retval = sos_syscall_get3args(user_ctxt, >> 508 (unsigned int*)& user_str, >> 509 (unsigned int*)& len, >> 510 (unsigned int*)& user_vfstat_struct); >> 511 if (SOS_OK != retval) >> 512 break; >> 513 >> 514 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 515 if (SOS_OK != retval) >> 516 break; >> 517 >> 518 retval = sos_fs_vfstat(proc, path, len, & kernel_vfstat_struct); >> 519 sos_kfree((sos_vaddr_t)path); >> 520 if (SOS_OK != retval) >> 521 break; >> 522 >> 523 if (sizeof(kernel_vfstat_struct) >> 524 != sos_memcpy_to_user(user_vfstat_struct, >> 525 (sos_vaddr_t) & kernel_vfstat_struct, >> 526 sizeof(kernel_vfstat_struct))) >> 527 retval = -SOS_EFAULT; >> 528 } >> 529 break; >> 530 >> 531 case SOS_SYSCALL_ID_OPEN: >> 532 { >> 533 sos_uaddr_t user_str; >> 534 sos_size_t len; >> 535 sos_ui32_t open_flags; >> 536 sos_ui32_t access_rights; >> 537 char * path; >> 538 struct sos_fs_opened_file * of; >> 539 struct sos_process * proc; >> 540 >> 541 proc = sos_thread_get_current()->process; >> 542 retval = sos_syscall_get4args(user_ctxt, >> 543 (unsigned int*)& user_str, >> 544 (unsigned int*)& len, >> 545 (unsigned int*)& open_flags, >> 546 (unsigned int*)& access_rights); >> 547 if (SOS_OK != retval) >> 548 break; >> 549 >> 550 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 551 if (SOS_OK != retval) >> 552 break; >> 553 >> 554 retval = sos_fs_open(proc, >> 555 path, len, >> 556 open_flags, >> 557 access_rights, >> 558 & of); >> 559 sos_kfree((sos_vaddr_t)path); >> 560 if (SOS_OK != retval) >> 561 break; >> 562 >> 563 retval = sos_process_register_opened_file(proc, of); >> 564 if (retval < 0) >> 565 { >> 566 sos_fs_close(of); >> 567 break; >> 568 } >> 569 } >> 570 break; >> 571 >> 572 case SOS_SYSCALL_ID_CLOSE: >> 573 { >> 574 struct sos_fs_opened_file * of; >> 575 struct sos_process * proc; >> 576 int fd; >> 577 >> 578 proc = sos_thread_get_current()->process; >> 579 retval = sos_syscall_get1arg(user_ctxt, >> 580 (unsigned int*)& fd); >> 581 if (SOS_OK != retval) >> 582 break; >> 583 >> 584 of = sos_process_get_opened_file(proc, fd); >> 585 if (NULL == of) >> 586 { >> 587 retval = -SOS_EBADF; >> 588 break; >> 589 } >> 590 >> 591 retval = sos_process_unregister_opened_file(proc, fd); >> 592 if (SOS_OK != retval) >> 593 break; >> 594 >> 595 retval = sos_fs_close(of); >> 596 } >> 597 break; >> 598 >> 599 case SOS_SYSCALL_ID_READ: >> 600 { >> 601 struct sos_fs_opened_file * of; >> 602 struct sos_process * proc; >> 603 sos_uaddr_t uaddr_buf; >> 604 sos_uaddr_t uaddr_buflen; >> 605 sos_size_t kernel_buflen; >> 606 int fd; >> 607 >> 608 proc = sos_thread_get_current()->process; >> 609 retval = sos_syscall_get3args(user_ctxt, >> 610 (unsigned int*)& fd, >> 611 (unsigned int*)& uaddr_buf, >> 612 (unsigned int*)& uaddr_buflen); >> 613 if (SOS_OK != retval) >> 614 break; >> 615 >> 616 /* Retrieve the value for "buflen" */ >> 617 retval = sos_memcpy_from_user((sos_vaddr_t)& kernel_buflen, >> 618 uaddr_buflen, >> 619 sizeof(kernel_buflen)); >> 620 if (sizeof(kernel_buflen) != retval) >> 621 { >> 622 retval = -SOS_EFAULT; >> 623 break; >> 624 } >> 625 >> 626 of = sos_process_get_opened_file(proc, fd); >> 627 if (NULL == of) >> 628 { >> 629 retval = -SOS_EBADF; >> 630 break; >> 631 } >> 632 >> 633 /* Do the actual reading */ >> 634 retval = sos_fs_read(of, uaddr_buf, & kernel_buflen); >> 635 >> 636 /* Send successful number of bytes read to user */ >> 637 sos_memcpy_to_user(uaddr_buflen, >> 638 (sos_vaddr_t)& kernel_buflen, >> 639 sizeof(kernel_buflen)); >> 640 } >> 641 break; >> 642 >> 643 case SOS_SYSCALL_ID_READDIR: >> 644 { >> 645 struct sos_fs_opened_file * of; >> 646 struct sos_process * proc; >> 647 sos_uaddr_t uaddr_direntry; >> 648 struct sos_fs_dirent direntry; >> 649 int fd; >> 650 >> 651 proc = sos_thread_get_current()->process; >> 652 retval = sos_syscall_get2args(user_ctxt, >> 653 (unsigned int*)& fd, >> 654 (unsigned int*)& uaddr_direntry); >> 655 if (SOS_OK != retval) >> 656 break; >> 657 >> 658 of = sos_process_get_opened_file(proc, fd); >> 659 if (NULL == of) >> 660 { >> 661 retval = -SOS_EBADF; >> 662 break; >> 663 } >> 664 >> 665 /* Do the actual readdir */ >> 666 retval = sos_fs_readdir(of, & direntry); >> 667 if (SOS_OK != retval) >> 668 break; >> 669 >> 670 /* Send direntry structure to user */ >> 671 if (sizeof(direntry) != sos_memcpy_to_user(uaddr_direntry, >> 672 (sos_vaddr_t)& direntry, >> 673 sizeof(direntry))) >> 674 retval = -SOS_EFAULT; >> 675 } >> 676 break; >> 677 >> 678 case SOS_SYSCALL_ID_WRITE: >> 679 { >> 680 struct sos_fs_opened_file * of; >> 681 struct sos_process * proc; >> 682 sos_uaddr_t uaddr_buf; >> 683 sos_uaddr_t uaddr_buflen; >> 684 sos_size_t kernel_buflen; >> 685 int fd; >> 686 >> 687 proc = sos_thread_get_current()->process; >> 688 retval = sos_syscall_get3args(user_ctxt, >> 689 (unsigned int*)& fd, >> 690 (unsigned int*)& uaddr_buf, >> 691 (unsigned int*)& uaddr_buflen); >> 692 if (SOS_OK != retval) >> 693 break; >> 694 >> 695 /* Retrieve the value for "buflen" */ >> 696 retval = sos_memcpy_from_user((sos_vaddr_t)& kernel_buflen, >> 697 uaddr_buflen, >> 698 sizeof(kernel_buflen)); >> 699 if (sizeof(kernel_buflen) != retval) >> 700 { >> 701 retval = -SOS_EFAULT; >> 702 break; >> 703 } >> 704 >> 705 of = sos_process_get_opened_file(proc, fd); >> 706 if (NULL == of) >> 707 { >> 708 retval = -SOS_EBADF; >> 709 break; >> 710 } >> 711 >> 712 /* Do the actual writing */ >> 713 retval = sos_fs_write(of, uaddr_buf, & kernel_buflen); >> 714 >> 715 /* Send successful number of bytes written to user */ >> 716 sos_memcpy_to_user(uaddr_buflen, >> 717 (sos_vaddr_t)& kernel_buflen, >> 718 sizeof(kernel_buflen)); >> 719 } >> 720 break; >> 721 >> 722 case SOS_SYSCALL_ID_SEEK64: >> 723 { >> 724 struct sos_fs_opened_file * of; >> 725 struct sos_process * proc; >> 726 sos_uaddr_t uaddr_offset; >> 727 sos_seek_whence_t whence; >> 728 sos_lsoffset_t kernel_offset, result_position; >> 729 int fd; >> 730 >> 731 proc = sos_thread_get_current()->process; >> 732 retval = sos_syscall_get3args(user_ctxt, >> 733 (unsigned int*)& fd, >> 734 (unsigned int*)& uaddr_offset, >> 735 (unsigned int*)& whence); >> 736 if (SOS_OK != retval) >> 737 break; 027 738 028 /** !! 739 /* Retrieve the value for "buflen" */ 029 * THE syscall entry point !! 740 retval = sos_memcpy_from_user((sos_vaddr_t)& kernel_offset, 030 */ !! 741 uaddr_offset, 031 sos_ret_t sos_do_syscall(int syscall_id, !! 742 sizeof(kernel_offset)); 032 const struct sos_cpu_ !! 743 if (sizeof(kernel_offset) != retval) 033 { !! 744 { 034 sos_ret_t retval; !! 745 retval = -SOS_EFAULT; >> 746 break; >> 747 } 035 748 036 switch(syscall_id) !! 749 of = sos_process_get_opened_file(proc, fd); 037 { !! 750 if (NULL == of) 038 case SOS_SYSCALL_ID_EXIT: !! 751 { >> 752 retval = -SOS_EBADF; >> 753 break; >> 754 } >> 755 >> 756 /* Do the actual seek */ >> 757 retval = sos_fs_seek(of, kernel_offset, whence, & result_position); >> 758 >> 759 /* Send successful number of bytes written to user */ >> 760 sos_memcpy_to_user(uaddr_offset, >> 761 (sos_vaddr_t)& result_position, >> 762 sizeof(kernel_offset)); >> 763 } >> 764 break; >> 765 >> 766 case SOS_SYSCALL_ID_FTRUNCATE64: 039 { 767 { 040 unsigned int status; !! 768 struct sos_fs_opened_file * of; 041 retval = sos_syscall_get1arg(user_ctxt !! 769 struct sos_process * proc; >> 770 sos_lsoffset_t length; >> 771 int fd; >> 772 >> 773 proc = sos_thread_get_current()->process; >> 774 retval = sos_syscall_get2args(user_ctxt, >> 775 (unsigned int*)& fd, >> 776 (unsigned int*)& length); 042 if (SOS_OK != retval) 777 if (SOS_OK != retval) 043 break; 778 break; 044 sos_thread_exit(); !! 779 045 retval = -SOS_EFATAL; /* Not reached * !! 780 of = sos_process_get_opened_file(proc, fd); >> 781 if (NULL == of) >> 782 { >> 783 retval = -SOS_EBADF; >> 784 break; >> 785 } >> 786 >> 787 /* Do the actual trunc */ >> 788 retval = sos_fs_ftruncate(of, length); >> 789 } >> 790 break; >> 791 >> 792 case SOS_SYSCALL_ID_FSMMAP: >> 793 { >> 794 sos_uaddr_t ptr_hint_uaddr; >> 795 sos_uaddr_t hint_uaddr; >> 796 sos_size_t length; >> 797 sos_ui32_t prot; >> 798 sos_ui32_t flags; >> 799 int fd; >> 800 sos_ui32_t offs64_hi; >> 801 sos_ui32_t offs64_lo; >> 802 sos_luoffset_t offset_in_resource; >> 803 struct sos_fs_opened_file * of; >> 804 struct sos_process * proc; >> 805 >> 806 proc = sos_thread_get_current()->process; >> 807 retval = sos_syscall_get7args(user_ctxt, >> 808 (unsigned int*)& ptr_hint_uaddr, >> 809 (unsigned int*)& length, >> 810 (unsigned int*)& prot, >> 811 (unsigned int*)& flags, >> 812 (unsigned int*)& fd, >> 813 (unsigned int*)& offs64_hi, >> 814 (unsigned int*)& offs64_lo); >> 815 if (SOS_OK != retval) >> 816 break; >> 817 >> 818 of = sos_process_get_opened_file(proc, fd); >> 819 if (NULL == of) >> 820 { >> 821 retval = -SOS_EBADF; >> 822 break; >> 823 } >> 824 >> 825 /* Compute 64 bits offset value */ >> 826 offset_in_resource = offs64_hi; >> 827 offset_in_resource <<= 32; >> 828 offset_in_resource |= offs64_lo; >> 829 >> 830 retval = sos_memcpy_from_user((sos_vaddr_t)& hint_uaddr, >> 831 ptr_hint_uaddr, >> 832 sizeof(hint_uaddr)); >> 833 if (sizeof(hint_uaddr) != retval) >> 834 { >> 835 retval = -SOS_EFAULT; >> 836 break; >> 837 } >> 838 >> 839 retval = sos_fs_mmap(of, & hint_uaddr, length, prot, flags, >> 840 offset_in_resource); >> 841 if (SOS_OK == retval) >> 842 { >> 843 if (sizeof(hint_uaddr) >> 844 != sos_memcpy_to_user(ptr_hint_uaddr, >> 845 (sos_vaddr_t)& hint_uaddr, >> 846 sizeof(hint_uaddr))) >> 847 { >> 848 sos_umem_vmm_unmap(sos_process_get_address_space(proc), >> 849 hint_uaddr, length); >> 850 retval = -SOS_EFAULT; >> 851 } >> 852 } >> 853 >> 854 } >> 855 break; >> 856 >> 857 case SOS_SYSCALL_ID_FSYNC: >> 858 { >> 859 struct sos_fs_opened_file * of; >> 860 struct sos_process * proc; >> 861 int fd; >> 862 >> 863 proc = sos_thread_get_current()->process; >> 864 retval = sos_syscall_get1arg(user_ctxt, >> 865 (unsigned int*)& fd); >> 866 if (SOS_OK != retval) >> 867 break; >> 868 >> 869 of = sos_process_get_opened_file(proc, fd); >> 870 if (NULL == of) >> 871 { >> 872 retval = -SOS_EBADF; >> 873 break; >> 874 } >> 875 >> 876 /* Do the actual sync */ >> 877 retval = sos_fs_fsync(of); >> 878 } >> 879 break; >> 880 >> 881 case SOS_SYSCALL_ID_FCNTL: >> 882 { >> 883 struct sos_fs_opened_file * of; >> 884 struct sos_process * proc; >> 885 sos_ui32_t cmd, arg; >> 886 int fd; >> 887 >> 888 proc = sos_thread_get_current()->process; >> 889 retval = sos_syscall_get3args(user_ctxt, >> 890 (unsigned int*)& fd, >> 891 (unsigned int*)& cmd, >> 892 (unsigned int*)& arg); >> 893 if (SOS_OK != retval) >> 894 break; >> 895 >> 896 of = sos_process_get_opened_file(proc, fd); >> 897 if (NULL == of) >> 898 { >> 899 retval = -SOS_EBADF; >> 900 break; >> 901 } >> 902 >> 903 /* Do the actual fcntl */ >> 904 retval = sos_fs_fcntl(of, cmd, arg); >> 905 } >> 906 break; >> 907 >> 908 case SOS_SYSCALL_ID_IOCTL: >> 909 { >> 910 struct sos_fs_opened_file * of; >> 911 struct sos_process * proc; >> 912 sos_ui32_t cmd, arg; >> 913 int fd; >> 914 >> 915 proc = sos_thread_get_current()->process; >> 916 retval = sos_syscall_get3args(user_ctxt, >> 917 (unsigned int*)& fd, >> 918 (unsigned int*)& cmd, >> 919 (unsigned int*)& arg); >> 920 if (SOS_OK != retval) >> 921 break; >> 922 >> 923 of = sos_process_get_opened_file(proc, fd); >> 924 if (NULL == of) >> 925 { >> 926 retval = -SOS_EBADF; >> 927 break; >> 928 } >> 929 >> 930 /* Do the actual ioctl */ >> 931 retval = sos_fs_ioctl(of, cmd, arg); >> 932 } >> 933 break; >> 934 >> 935 case SOS_SYSCALL_ID_CREAT: >> 936 { >> 937 sos_uaddr_t user_str; >> 938 sos_size_t len; >> 939 sos_ui32_t access_rights; >> 940 char * path; >> 941 struct sos_process * proc; >> 942 >> 943 proc = sos_thread_get_current()->process; >> 944 retval = sos_syscall_get3args(user_ctxt, >> 945 (unsigned int*)& user_str, >> 946 (unsigned int*)& len, >> 947 (unsigned int*)& access_rights); >> 948 if (SOS_OK != retval) >> 949 break; >> 950 >> 951 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 952 if (SOS_OK != retval) >> 953 break; >> 954 >> 955 retval = sos_fs_creat(proc, >> 956 path, len, >> 957 access_rights); >> 958 sos_kfree((sos_vaddr_t)path); >> 959 } >> 960 break; >> 961 >> 962 case SOS_SYSCALL_ID_LINK: >> 963 case SOS_SYSCALL_ID_RENAME: >> 964 { >> 965 sos_uaddr_t user_oldpath, user_newpath; >> 966 sos_size_t oldpathlen, newpathlen; >> 967 char * kernel_oldpath, * kernel_newpath; >> 968 struct sos_process * proc; >> 969 >> 970 proc = sos_thread_get_current()->process; >> 971 retval = sos_syscall_get4args(user_ctxt, >> 972 (unsigned int*)& user_oldpath, >> 973 (unsigned int*)& oldpathlen, >> 974 (unsigned int*)& user_newpath, >> 975 (unsigned int*)& newpathlen); >> 976 if (SOS_OK != retval) >> 977 break; >> 978 >> 979 retval = sos_strndup_from_user(&kernel_oldpath, >> 980 user_oldpath, >> 981 oldpathlen, 0); >> 982 if (SOS_OK != retval) >> 983 break; >> 984 >> 985 retval = sos_strndup_from_user(&kernel_newpath, >> 986 user_newpath, >> 987 newpathlen, 0); >> 988 if (SOS_OK != retval) >> 989 { >> 990 sos_kfree((sos_vaddr_t) kernel_oldpath); >> 991 break; >> 992 } >> 993 >> 994 if (syscall_id == SOS_SYSCALL_ID_LINK) >> 995 retval = sos_fs_link(proc, >> 996 kernel_oldpath, oldpathlen, >> 997 kernel_newpath, newpathlen); >> 998 else >> 999 retval = sos_fs_rename(proc, >> 1000 kernel_oldpath, oldpathlen, >> 1001 kernel_newpath, newpathlen); >> 1002 sos_kfree((sos_vaddr_t)kernel_oldpath); >> 1003 sos_kfree((sos_vaddr_t)kernel_newpath); >> 1004 } >> 1005 break; >> 1006 >> 1007 case SOS_SYSCALL_ID_UNLINK: >> 1008 { >> 1009 sos_uaddr_t user_str; >> 1010 sos_size_t len; >> 1011 char * path; >> 1012 struct sos_process * proc; >> 1013 >> 1014 proc = sos_thread_get_current()->process; >> 1015 retval = sos_syscall_get2args(user_ctxt, >> 1016 (unsigned int*)& user_str, >> 1017 (unsigned int*)& len); >> 1018 if (SOS_OK != retval) >> 1019 break; >> 1020 >> 1021 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 1022 if (SOS_OK != retval) >> 1023 break; >> 1024 >> 1025 retval = sos_fs_unlink(proc, >> 1026 path, len); >> 1027 sos_kfree((sos_vaddr_t)path); >> 1028 } >> 1029 break; >> 1030 >> 1031 case SOS_SYSCALL_ID_SYMLINK: >> 1032 { >> 1033 sos_uaddr_t user_path, user_targetpath; >> 1034 sos_size_t pathlen, targetpathlen; >> 1035 char * kernel_path; >> 1036 struct sos_process * proc; >> 1037 >> 1038 proc = sos_thread_get_current()->process; >> 1039 retval = sos_syscall_get4args(user_ctxt, >> 1040 (unsigned int*)& user_path, >> 1041 (unsigned int*)& pathlen, >> 1042 (unsigned int*)& user_targetpath, >> 1043 (unsigned int*)& targetpathlen); >> 1044 if (SOS_OK != retval) >> 1045 break; >> 1046 >> 1047 retval = sos_strndup_from_user(&kernel_path, >> 1048 user_path, >> 1049 pathlen, 0); >> 1050 if (SOS_OK != retval) >> 1051 break; >> 1052 >> 1053 retval = sos_fs_symlink(proc, >> 1054 kernel_path, pathlen, >> 1055 user_targetpath, targetpathlen); >> 1056 sos_kfree((sos_vaddr_t)kernel_path); >> 1057 } >> 1058 break; >> 1059 >> 1060 case SOS_SYSCALL_ID_MKNOD: >> 1061 { >> 1062 sos_uaddr_t user_str; >> 1063 sos_size_t len; >> 1064 sos_ui32_t access_rights; >> 1065 int type; >> 1066 char * path; >> 1067 struct sos_fs_dev_id_t dev_id; >> 1068 struct sos_process * proc; >> 1069 >> 1070 proc = sos_thread_get_current()->process; >> 1071 retval = sos_syscall_get6args(user_ctxt, >> 1072 (unsigned int*)& user_str, >> 1073 (unsigned int*)& len, >> 1074 (unsigned int*)& type, >> 1075 (unsigned int*)& access_rights, >> 1076 (unsigned int*)& dev_id.device_class, >> 1077 (unsigned int*)& dev_id.device_instance); >> 1078 if (SOS_OK != retval) >> 1079 break; >> 1080 >> 1081 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 1082 if (SOS_OK != retval) >> 1083 break; >> 1084 >> 1085 switch (type) >> 1086 { >> 1087 case SOS_FS_NODE_REGULAR_FILE: >> 1088 retval = sos_fs_creat(proc, path, len, access_rights); >> 1089 break; >> 1090 >> 1091 case SOS_FS_NODE_DIRECTORY: >> 1092 retval = sos_fs_mkdir(proc, path, len, access_rights); >> 1093 break; >> 1094 >> 1095 case SOS_FS_NODE_SYMLINK: >> 1096 retval = -SOS_ENOSUP; >> 1097 break; >> 1098 >> 1099 case SOS_FS_NODE_DEVICE_CHAR: >> 1100 retval = sos_fs_mknod(proc, >> 1101 path, len, type, access_rights, &dev_id); >> 1102 break; >> 1103 >> 1104 default: >> 1105 retval = -SOS_EINVAL; >> 1106 break; >> 1107 } >> 1108 >> 1109 sos_kfree((sos_vaddr_t)path); >> 1110 } >> 1111 break; >> 1112 >> 1113 case SOS_SYSCALL_ID_MKDIR: >> 1114 { >> 1115 sos_uaddr_t user_str; >> 1116 sos_size_t len; >> 1117 sos_ui32_t access_rights; >> 1118 char * path; >> 1119 struct sos_process * proc; >> 1120 >> 1121 proc = sos_thread_get_current()->process; >> 1122 retval = sos_syscall_get3args(user_ctxt, >> 1123 (unsigned int*)& user_str, >> 1124 (unsigned int*)& len, >> 1125 (unsigned int*)& access_rights); >> 1126 if (SOS_OK != retval) >> 1127 break; >> 1128 >> 1129 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 1130 if (SOS_OK != retval) >> 1131 break; >> 1132 >> 1133 retval = sos_fs_mkdir(proc, >> 1134 path, len, access_rights); >> 1135 sos_kfree((sos_vaddr_t)path); >> 1136 } >> 1137 break; >> 1138 >> 1139 case SOS_SYSCALL_ID_RMDIR: >> 1140 { >> 1141 sos_uaddr_t user_str; >> 1142 sos_size_t len; >> 1143 char * path; >> 1144 struct sos_process * proc; >> 1145 >> 1146 proc = sos_thread_get_current()->process; >> 1147 retval = sos_syscall_get2args(user_ctxt, >> 1148 (unsigned int*)& user_str, >> 1149 (unsigned int*)& len); >> 1150 if (SOS_OK != retval) >> 1151 break; >> 1152 >> 1153 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 1154 if (SOS_OK != retval) >> 1155 break; >> 1156 >> 1157 retval = sos_fs_rmdir(proc, path, len); >> 1158 sos_kfree((sos_vaddr_t)path); >> 1159 } >> 1160 break; >> 1161 >> 1162 case SOS_SYSCALL_ID_CHMOD: >> 1163 { >> 1164 sos_uaddr_t user_str; >> 1165 sos_size_t len; >> 1166 sos_ui32_t access_rights; >> 1167 char * path; >> 1168 struct sos_process * proc; >> 1169 >> 1170 proc = sos_thread_get_current()->process; >> 1171 retval = sos_syscall_get3args(user_ctxt, >> 1172 (unsigned int*)& user_str, >> 1173 (unsigned int*)& len, >> 1174 (unsigned int*)& access_rights); >> 1175 if (SOS_OK != retval) >> 1176 break; >> 1177 >> 1178 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 1179 if (SOS_OK != retval) >> 1180 break; >> 1181 >> 1182 retval = sos_fs_chmod(proc, path, len, access_rights); >> 1183 sos_kfree((sos_vaddr_t)path); >> 1184 } >> 1185 break; >> 1186 >> 1187 case SOS_SYSCALL_ID_STAT64: >> 1188 { >> 1189 sos_uaddr_t user_str; >> 1190 sos_size_t len; >> 1191 sos_uaddr_t user_stat_struct; >> 1192 struct sos_fs_stat kernel_stat_struct; >> 1193 int nofollow; >> 1194 char * path; >> 1195 struct sos_process * proc; >> 1196 >> 1197 proc = sos_thread_get_current()->process; >> 1198 retval = sos_syscall_get4args(user_ctxt, >> 1199 (unsigned int*)& user_str, >> 1200 (unsigned int*)& len, >> 1201 (unsigned int*)& nofollow, >> 1202 (unsigned int*)& user_stat_struct); >> 1203 if (SOS_OK != retval) >> 1204 break; >> 1205 >> 1206 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 1207 if (SOS_OK != retval) >> 1208 break; >> 1209 >> 1210 retval = sos_fs_stat(proc, path, len, nofollow, & kernel_stat_struct); >> 1211 sos_kfree((sos_vaddr_t)path); >> 1212 if (SOS_OK != retval) >> 1213 break; >> 1214 >> 1215 if (sizeof(kernel_stat_struct) >> 1216 != sos_memcpy_to_user(user_stat_struct, >> 1217 (sos_vaddr_t) & kernel_stat_struct, >> 1218 sizeof(kernel_stat_struct))) >> 1219 retval = -SOS_EFAULT; >> 1220 } >> 1221 break; >> 1222 >> 1223 case SOS_SYSCALL_ID_CHROOT: >> 1224 case SOS_SYSCALL_ID_CHDIR: >> 1225 { >> 1226 sos_uaddr_t user_str; >> 1227 sos_size_t len; >> 1228 char * path; >> 1229 struct sos_fs_opened_file * of, * old_of; >> 1230 struct sos_process * proc; >> 1231 >> 1232 proc = sos_thread_get_current()->process; >> 1233 retval = sos_syscall_get2args(user_ctxt, >> 1234 (unsigned int*)& user_str, >> 1235 (unsigned int*)& len); >> 1236 if (SOS_OK != retval) >> 1237 break; >> 1238 >> 1239 retval = sos_strndup_from_user(&path, user_str, len, 0); >> 1240 if (SOS_OK != retval) >> 1241 break; >> 1242 >> 1243 retval = sos_fs_open(proc, >> 1244 path, len, >> 1245 SOS_FS_OPEN_DIRECTORY, >> 1246 SOS_FS_OPEN_READ, >> 1247 & of); >> 1248 sos_kfree((sos_vaddr_t)path); >> 1249 if (SOS_OK != retval) >> 1250 break; >> 1251 >> 1252 if (syscall_id == SOS_SYSCALL_ID_CHROOT) >> 1253 retval = sos_process_chroot(proc, of, & old_of); >> 1254 else >> 1255 retval = sos_process_chdir(proc, of, & old_of); >> 1256 >> 1257 if (retval < 0) >> 1258 { >> 1259 sos_fs_close(of); >> 1260 break; >> 1261 } >> 1262 >> 1263 sos_fs_close(old_of); >> 1264 } >> 1265 break; >> 1266 >> 1267 case SOS_SYSCALL_ID_FCHDIR: >> 1268 { >> 1269 struct sos_fs_opened_file * of, * new_of, * old_of; >> 1270 struct sos_process * proc; >> 1271 int fd; >> 1272 >> 1273 proc = sos_thread_get_current()->process; >> 1274 retval = sos_syscall_get1arg(user_ctxt, >> 1275 (unsigned int*)& fd); >> 1276 if (SOS_OK != retval) >> 1277 break; >> 1278 >> 1279 of = sos_process_get_opened_file(proc, fd); >> 1280 if (NULL == of) >> 1281 { >> 1282 retval = -SOS_EBADF; >> 1283 break; >> 1284 } >> 1285 >> 1286 /* Duplicate this FD */ >> 1287 retval = sos_fs_duplicate_opened_file(of, proc, & new_of); >> 1288 if (SOS_OK != retval) >> 1289 break; >> 1290 >> 1291 /* Do the actual chdir */ >> 1292 retval = sos_process_chdir(proc, new_of, & old_of); >> 1293 if (retval < 0) >> 1294 { >> 1295 sos_fs_close(new_of); >> 1296 break; >> 1297 } >> 1298 >> 1299 sos_fs_close(old_of); 046 } 1300 } 047 break; 1301 break; >> 1302 048 case SOS_SYSCALL_ID_BOCHS_WRITE: 1303 case SOS_SYSCALL_ID_BOCHS_WRITE: 049 { 1304 { 050 sos_uaddr_t user_str; 1305 sos_uaddr_t user_str; 051 sos_size_t len; 1306 sos_size_t len; 052 char * str; 1307 char * str; 053 retval = sos_syscall_get2args(user_ctx 1308 retval = sos_syscall_get2args(user_ctxt, & user_str, & len); 054 if (SOS_OK != retval) 1309 if (SOS_OK != retval) 055 break; 1310 break; 056 1311 057 str = (char*)sos_kmalloc(len + 1, 0); !! 1312 retval = sos_strndup_from_user(& str, user_str, len + 1, 0); 058 if (str) !! 1313 if (SOS_OK == retval) 059 { 1314 { 060 retval = sos_strzcpy_from_user(str !! 1315 sos_bochs_printf("THR 0x%x: ", 061 str[len] = '\0'; !! 1316 (unsigned)sos_thread_get_current()); 062 if (SOS_OK == retval) !! 1317 retval = sos_bochs_putstring(str); 063 { !! 1318 retval = len; 064 sos_bochs_printf("THR 0x%x: ", << 065 (unsigned)sos << 066 retval = sos_bochs_putstring(s << 067 retval = len; << 068 } << 069 sos_kfree((sos_vaddr_t)str); 1319 sos_kfree((sos_vaddr_t)str); 070 } 1320 } 071 else << 072 retval = -SOS_ENOMEM; << 073 } 1321 } 074 break; 1322 break; 075 1323 076 1324 077 /* ************************************* 1325 /* *********************************************** 078 * Debug syscalls (will be removed in th 1326 * Debug syscalls (will be removed in the future) 079 */ 1327 */ 080 1328 081 1329 082 /** 1330 /** 083 * Syscall 4012: hexdump of a user-space 1331 * Syscall 4012: hexdump of a user-space memory region 084 * args: addr_start size, retval=ignored 1332 * args: addr_start size, retval=ignored 085 */ 1333 */ 086 case 4012: 1334 case 4012: 087 { 1335 { 088 sos_uaddr_t user_str; 1336 sos_uaddr_t user_str; 089 unsigned int len; 1337 unsigned int len; 090 unsigned char * str; 1338 unsigned char * str; 091 1339 092 retval = sos_syscall_get2args(user_ctx 1340 retval = sos_syscall_get2args(user_ctxt, & user_str, & len); 093 if (SOS_OK != retval) 1341 if (SOS_OK != retval) 094 break; 1342 break; 095 1343 096 str = (char*)sos_kmalloc(len + 1, 0); !! 1344 str = (unsigned char*)sos_kmalloc(len, 0); 097 if (str) 1345 if (str) 098 { 1346 { 099 int i; 1347 int i; 100 sos_bochs_printf("Hexdump(0x%x, %d 1348 sos_bochs_printf("Hexdump(0x%x, %d):\n", user_str, len); 101 retval = sos_memcpy_from_user((sos 1349 retval = sos_memcpy_from_user((sos_vaddr_t) str, user_str, len); 102 sos_bochs_printf(" (Successfully 1350 sos_bochs_printf(" (Successfully copied %d out of %d)\n", 103 retval, len); 1351 retval, len); 104 1352 105 for (i = 0 ; i < retval ; i++) 1353 for (i = 0 ; i < retval ; i++) 106 { 1354 { 107 if ((i % 32) == 0) 1355 if ((i % 32) == 0) 108 sos_bochs_printf("%x:", i); 1356 sos_bochs_printf("%x:", i); 109 sos_bochs_printf(" %x", str[i] 1357 sos_bochs_printf(" %x", str[i]); 110 if (((i+1) % 32) == 0) 1358 if (((i+1) % 32) == 0) 111 sos_bochs_printf("\n"); 1359 sos_bochs_printf("\n"); 112 } 1360 } 113 if (i % 32) 1361 if (i % 32) 114 sos_bochs_printf("\n"); 1362 sos_bochs_printf("\n"); 115 1363 116 sos_kfree((sos_vaddr_t)str); 1364 sos_kfree((sos_vaddr_t)str); 117 } 1365 } 118 else 1366 else 119 retval = -SOS_ENOMEM; 1367 retval = -SOS_ENOMEM; >> 1368 } >> 1369 break; >> 1370 >> 1371 >> 1372 /** >> 1373 * Syscall 4004: lists the VR of the current thread's address space >> 1374 * args: debug_string, retval=ignored >> 1375 */ >> 1376 case 4004: >> 1377 { >> 1378 sos_uaddr_t ustr; >> 1379 char * kstr; >> 1380 struct sos_umem_vmm_as * my_as; >> 1381 >> 1382 retval = sos_syscall_get1arg(user_ctxt, & ustr); >> 1383 if (SOS_OK != retval) >> 1384 break; >> 1385 >> 1386 retval = sos_strndup_from_user(& kstr, ustr, 256, 0); >> 1387 if (SOS_OK != retval) >> 1388 break; >> 1389 >> 1390 extern void sos_dump_as(const struct sos_umem_vmm_as *, const char *); >> 1391 my_as >> 1392 = sos_process_get_address_space(sos_thread_get_current()->process); >> 1393 sos_dump_as(my_as, kstr); >> 1394 sos_kfree((sos_vaddr_t)kstr); 120 } 1395 } 121 break; 1396 break; 122 1397 123 1398 124 /** 1399 /** 125 * Syscall 4008: dump the list of proces 1400 * Syscall 4008: dump the list of processes in the system 126 * args: none, retval=ignored 1401 * args: none, retval=ignored 127 */ 1402 */ 128 case 4008: 1403 case 4008: 129 { 1404 { 130 extern void sos_process_dumplist(void) 1405 extern void sos_process_dumplist(void); 131 sos_process_dumplist(); 1406 sos_process_dumplist(); 132 retval = SOS_OK; 1407 retval = SOS_OK; 133 } 1408 } 134 break; 1409 break; 135 1410 136 default: 1411 default: 137 sos_bochs_printf("Syscall: UNKNOWN[%d]\n 1412 sos_bochs_printf("Syscall: UNKNOWN[%d]\n", syscall_id); 138 retval = -SOS_ENOSUP; 1413 retval = -SOS_ENOSUP; 139 } 1414 } 140 1415 141 return retval; 1416 return retval; 142 } 1417 }
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