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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> 022 #include <hwcore/paging.h> 023 #include <sos/physmem.h> 023 #include <sos/physmem.h> 024 #include <sos/umem_vmm.h> 024 #include <sos/umem_vmm.h> 025 #include <drivers/zero.h> 025 #include <drivers/zero.h> 026 #include <drivers/mem.h> 026 #include <drivers/mem.h> 027 #include <sos/binfmt_elf32.h> 027 #include <sos/binfmt_elf32.h> 028 028 029 #include <hwcore/cpu_context.h> 029 #include <hwcore/cpu_context.h> 030 #include <sos/uaccess.h> 030 #include <sos/uaccess.h> 031 #include "syscall.h" 031 #include "syscall.h" 032 032 >> 033 033 /** 034 /** 034 * THE syscall entry point 035 * THE syscall entry point 035 */ 036 */ 036 sos_ret_t sos_do_syscall(int syscall_id, 037 sos_ret_t sos_do_syscall(int syscall_id, 037 const struct sos_cpu_ 038 const struct sos_cpu_state *user_ctxt) 038 { 039 { 039 sos_ret_t retval; 040 sos_ret_t retval; 040 041 041 switch(syscall_id) 042 switch(syscall_id) 042 { 043 { 043 case SOS_SYSCALL_ID_EXIT: 044 case SOS_SYSCALL_ID_EXIT: 044 { 045 { 045 unsigned int status; 046 unsigned int status; 046 << 047 retval = sos_syscall_get1arg(user_ctxt 047 retval = sos_syscall_get1arg(user_ctxt, & status); 048 if (SOS_OK != retval) 048 if (SOS_OK != retval) 049 break; 049 break; 050 sos_thread_exit(); 050 sos_thread_exit(); 051 retval = -SOS_EFATAL; /* Not reached * 051 retval = -SOS_EFATAL; /* Not reached */ 052 } 052 } 053 break; 053 break; 054 054 055 case SOS_SYSCALL_ID_FORK: 055 case SOS_SYSCALL_ID_FORK: 056 { 056 { 057 struct sos_thread *cur_thr, *new_thr; 057 struct sos_thread *cur_thr, *new_thr; 058 struct sos_process *new_proc; 058 struct sos_process *new_proc; 059 059 060 cur_thr = sos_thread_get_current(); 060 cur_thr = sos_thread_get_current(); 061 061 062 /* Duplicate the current process (and 062 /* Duplicate the current process (and its address space) */ 063 new_proc = sos_process_create(NULL, TR 063 new_proc = sos_process_create(NULL, TRUE); 064 if (! new_proc) 064 if (! new_proc) 065 { 065 { 066 retval = -SOS_ENOMEM; 066 retval = -SOS_ENOMEM; 067 break; 067 break; 068 } 068 } 069 069 070 /* Create *the* thread in this new pro 070 /* Create *the* thread in this new processs, copy of the 071 current user thread (same registers 071 current user thread (same registers, EXCEPT eax which is 072 set to 0) */ 072 set to 0) */ 073 new_thr = 073 new_thr = 074 sos_duplicate_user_thread(NULL, new_ 074 sos_duplicate_user_thread(NULL, new_proc, 075 cur_thr, 075 cur_thr, 076 user_ctxt, 076 user_ctxt, 077 0); 077 0); 078 if (! new_thr) 078 if (! new_thr) 079 { 079 { 080 sos_process_unref(new_proc); 080 sos_process_unref(new_proc); 081 retval = -SOS_ENOMEM; 081 retval = -SOS_ENOMEM; 082 break; 082 break; 083 } 083 } 084 084 085 sos_process_unref(new_proc); 085 sos_process_unref(new_proc); 086 086 087 /* Return to the "parent" thread with 087 /* Return to the "parent" thread with a value different from 088 0. Unix says it should be the "PID" 088 0. Unix says it should be the "PID" of the child. We don't 089 have such a "PID" notion for now */ 089 have such a "PID" notion for now */ 090 retval = (sos_ui32_t)new_proc; 090 retval = (sos_ui32_t)new_proc; 091 } 091 } 092 break; 092 break; 093 093 094 case SOS_SYSCALL_ID_EXEC: 094 case SOS_SYSCALL_ID_EXEC: 095 { 095 { 096 struct sos_thread *cur_thr, *new_thr; 096 struct sos_thread *cur_thr, *new_thr; 097 struct sos_process * proc; << 098 struct sos_umem_vmm_as *new_as; 097 struct sos_umem_vmm_as *new_as; 099 sos_uaddr_t user_str, ustack, start_ua 098 sos_uaddr_t user_str, ustack, start_uaddr; 100 sos_size_t len; 099 sos_size_t len; 101 char * str; 100 char * str; 102 101 103 cur_thr = sos_thread_get_current(); 102 cur_thr = sos_thread_get_current(); 104 proc = cur_thr->process; << 105 103 106 /* Make sure the process has exactly 1 104 /* Make sure the process has exactly 1 thread in it */ 107 if (sos_process_get_nb_threads(proc) ! !! 105 if (sos_process_get_nb_threads(cur_thr->process) != 1) 108 { 106 { 109 retval = -SOS_EBUSY; 107 retval = -SOS_EBUSY; 110 break; 108 break; 111 } 109 } 112 110 113 /* Get the user arguments */ 111 /* Get the user arguments */ 114 retval = sos_syscall_get2args(user_ctx 112 retval = sos_syscall_get2args(user_ctxt, & user_str, & len); 115 if (SOS_OK != retval) 113 if (SOS_OK != retval) 116 break; 114 break; 117 115 118 /* Copy the program name into kernel s 116 /* Copy the program name into kernel sppace */ 119 retval = sos_strndup_from_user(& str, !! 117 str = (char*)sos_kmalloc(len + 1, 0); 120 if (SOS_OK != retval) !! 118 if (! str) >> 119 { >> 120 retval = -SOS_ENOMEM; >> 121 break; >> 122 } >> 123 retval = sos_strzcpy_from_user(str, user_str, len + 1); >> 124 if (retval < SOS_OK) 121 { 125 { >> 126 sos_kfree((sos_vaddr_t)str); 122 break; 127 break; 123 } 128 } 124 129 125 /* Create a new empty address space to 130 /* Create a new empty address space to map the program */ 126 new_as = sos_umem_vmm_create_empty_as( !! 131 new_as = sos_umem_vmm_create_empty_as(cur_thr->process); 127 if (! new_as) 132 if (! new_as) 128 { 133 { 129 sos_kfree((sos_vaddr_t)str); 134 sos_kfree((sos_vaddr_t)str); 130 retval = -SOS_ENOMEM; 135 retval = -SOS_ENOMEM; 131 break; 136 break; 132 } 137 } 133 138 134 /* Map the program in it */ 139 /* Map the program in it */ 135 start_uaddr = sos_binfmt_elf32_map(new 140 start_uaddr = sos_binfmt_elf32_map(new_as, str); 136 if (start_uaddr == (sos_uaddr_t)NULL) 141 if (start_uaddr == (sos_uaddr_t)NULL) 137 { 142 { 138 sos_umem_vmm_delete_as(new_as); 143 sos_umem_vmm_delete_as(new_as); 139 sos_kfree((sos_vaddr_t)str); 144 sos_kfree((sos_vaddr_t)str); 140 retval = -SOS_ENOENT; 145 retval = -SOS_ENOENT; 141 break; 146 break; 142 } 147 } 143 148 144 /* Allocate space for the user stack ( 149 /* Allocate space for the user stack (8MB) */ 145 #define SOS_DEFAULT_USER_STACK_SIZE (8 << 20) 150 #define SOS_DEFAULT_USER_STACK_SIZE (8 << 20) 146 ustack = (SOS_PAGING_TOP_USER_ADDRESS 151 ustack = (SOS_PAGING_TOP_USER_ADDRESS - SOS_DEFAULT_USER_STACK_SIZE) 147 + 1; 152 + 1; 148 retval = sos_dev_zero_map(new_as, &ust 153 retval = sos_dev_zero_map(new_as, &ustack, SOS_DEFAULT_USER_STACK_SIZE, 149 SOS_VM_MAP_P 154 SOS_VM_MAP_PROT_READ | SOS_VM_MAP_PROT_WRITE, 150 /* PRIVATE * 155 /* PRIVATE */ 0); 151 if (SOS_OK != retval) 156 if (SOS_OK != retval) 152 { 157 { 153 sos_umem_vmm_delete_as(new_as); 158 sos_umem_vmm_delete_as(new_as); 154 sos_kfree((sos_vaddr_t)str); 159 sos_kfree((sos_vaddr_t)str); 155 break; 160 break; 156 } 161 } 157 162 158 /* Now create the user thread */ 163 /* Now create the user thread */ 159 new_thr = sos_create_user_thread(NULL, 164 new_thr = sos_create_user_thread(NULL, 160 proc, !! 165 cur_thr->process, 161 start 166 start_uaddr, 162 0, 0, 167 0, 0, 163 ustac 168 ustack + SOS_DEFAULT_USER_STACK_SIZE 164 - 4 169 - 4, 165 SOS_S 170 SOS_SCHED_PRIO_TS_LOWEST); 166 if (! new_thr) 171 if (! new_thr) 167 { 172 { 168 sos_umem_vmm_delete_as(new_as); 173 sos_umem_vmm_delete_as(new_as); 169 sos_kfree((sos_vaddr_t)str); 174 sos_kfree((sos_vaddr_t)str); 170 retval = -SOS_ENOMEM; 175 retval = -SOS_ENOMEM; 171 break; 176 break; 172 } 177 } 173 178 174 sos_process_set_name(proc, str); !! 179 sos_process_set_name(cur_thr->process, str); 175 180 176 /* Switch to this address space */ 181 /* Switch to this address space */ 177 retval = sos_process_set_address_space !! 182 retval = sos_process_set_address_space(cur_thr->process, 178 183 new_as); 179 if (SOS_OK != retval) 184 if (SOS_OK != retval) 180 { 185 { 181 sos_umem_vmm_delete_as(new_as); 186 sos_umem_vmm_delete_as(new_as); 182 sos_kfree((sos_vaddr_t)str); 187 sos_kfree((sos_vaddr_t)str); 183 break; 188 break; 184 } 189 } 185 190 186 /* The current thread must exit now */ 191 /* The current thread must exit now */ 187 sos_kfree((sos_vaddr_t)str); 192 sos_kfree((sos_vaddr_t)str); 188 sos_thread_exit(); 193 sos_thread_exit(); 189 retval = -SOS_EFATAL; 194 retval = -SOS_EFATAL; 190 } 195 } 191 break; 196 break; 192 197 >> 198 case SOS_SYSCALL_ID_MMAP: >> 199 { >> 200 sos_uaddr_t ptr_hint_uaddr; >> 201 sos_uaddr_t hint_uaddr; >> 202 sos_size_t length; >> 203 sos_ui32_t prot; >> 204 sos_ui32_t flags; >> 205 sos_uaddr_t name_user; >> 206 sos_ui32_t offs64_hi; >> 207 sos_ui32_t offs64_lo; >> 208 sos_luoffset_t offset_in_resource; >> 209 char name[256]; >> 210 struct sos_umem_vmm_as * my_as; >> 211 >> 212 retval = sos_syscall_get7args(user_ctxt, >> 213 (unsigned int*)& ptr_hint_uaddr, >> 214 (unsigned int*)& length, >> 215 (unsigned int*)& prot, >> 216 (unsigned int*)& flags, >> 217 (unsigned int*)& name_user, >> 218 (unsigned int*)& offs64_hi, >> 219 (unsigned int*)& offs64_lo); >> 220 if (SOS_OK != retval) >> 221 break; >> 222 >> 223 /* Compute 64 bits offset value */ >> 224 offset_in_resource = offs64_hi; >> 225 offset_in_resource <<= 32; >> 226 offset_in_resource |= offs64_lo; >> 227 >> 228 retval = sos_memcpy_from_user((sos_vaddr_t)& hint_uaddr, >> 229 ptr_hint_uaddr, >> 230 sizeof(hint_uaddr)); >> 231 if (sizeof(hint_uaddr) != retval) >> 232 { >> 233 retval = -SOS_EFAULT; >> 234 break; >> 235 } >> 236 >> 237 retval = sos_strzcpy_from_user(name, name_user, sizeof(name)); >> 238 if (SOS_OK != retval) >> 239 break; >> 240 >> 241 my_as >> 242 = sos_process_get_address_space(sos_thread_get_current()->process); >> 243 if ( (0 == strncmp(name, "/dev/zero", sizeof(name))) >> 244 || (0 == strncmp(name, "/dev/null", sizeof(name))) ) >> 245 retval = sos_dev_zero_map(my_as, & hint_uaddr, length, prot, flags); >> 246 else if (0 == strncmp(name, "/dev/mem", sizeof(name))) >> 247 retval = sos_dev_physmem_map(my_as, & hint_uaddr, length, >> 248 offset_in_resource, prot, flags); >> 249 else if (0 == strncmp(name, "/dev/kmem", sizeof(name))) >> 250 retval = sos_dev_kmem_map(my_as, & hint_uaddr, length, >> 251 offset_in_resource, prot, flags); >> 252 else >> 253 retval = -SOS_ENOENT; >> 254 >> 255 if (SOS_OK == retval) >> 256 { >> 257 if (sizeof(hint_uaddr) >> 258 != sos_memcpy_to_user(ptr_hint_uaddr, >> 259 (sos_vaddr_t)& hint_uaddr, >> 260 sizeof(hint_uaddr))) >> 261 { >> 262 sos_umem_vmm_unmap(my_as, hint_uaddr, length); >> 263 retval = -SOS_EFAULT; >> 264 } >> 265 } >> 266 >> 267 } >> 268 break; >> 269 193 case SOS_SYSCALL_ID_MUNMAP: 270 case SOS_SYSCALL_ID_MUNMAP: 194 { 271 { 195 sos_uaddr_t start_uaddr; 272 sos_uaddr_t start_uaddr; 196 sos_size_t size; 273 sos_size_t size; 197 struct sos_umem_vmm_as * my_as; 274 struct sos_umem_vmm_as * my_as; 198 275 199 my_as 276 my_as 200 = sos_process_get_address_space(sos_ 277 = sos_process_get_address_space(sos_thread_get_current()->process); 201 278 202 retval = sos_syscall_get2args(user_ctx 279 retval = sos_syscall_get2args(user_ctxt, 203 (unsigne 280 (unsigned int*)& start_uaddr, 204 (unsigne 281 (unsigned int*)& size); 205 if (SOS_OK != retval) 282 if (SOS_OK != retval) 206 break; 283 break; 207 284 208 retval = sos_umem_vmm_unmap(my_as, sta 285 retval = sos_umem_vmm_unmap(my_as, start_uaddr, size); 209 } 286 } 210 break; 287 break; 211 288 212 case SOS_SYSCALL_ID_MPROTECT: 289 case SOS_SYSCALL_ID_MPROTECT: 213 { 290 { 214 sos_uaddr_t start_uaddr; 291 sos_uaddr_t start_uaddr; 215 sos_size_t size; 292 sos_size_t size; 216 sos_ui32_t new_access_rights; 293 sos_ui32_t new_access_rights; 217 struct sos_umem_vmm_as * my_as; 294 struct sos_umem_vmm_as * my_as; 218 295 219 my_as 296 my_as 220 = sos_process_get_address_space(sos_ 297 = sos_process_get_address_space(sos_thread_get_current()->process); 221 298 222 retval = sos_syscall_get3args(user_ctx 299 retval = sos_syscall_get3args(user_ctxt, 223 (unsigne 300 (unsigned int*)& start_uaddr, 224 (unsigne 301 (unsigned int*)& size, 225 (unsigne 302 (unsigned int*)& new_access_rights); 226 if (SOS_OK != retval) 303 if (SOS_OK != retval) 227 break; 304 break; 228 305 229 retval = sos_thread_prepare_user_space 306 retval = sos_thread_prepare_user_space_access(NULL, (sos_vaddr_t)NULL); 230 if (SOS_OK != retval) 307 if (SOS_OK != retval) 231 break; 308 break; 232 309 233 retval = sos_umem_vmm_chprot(my_as, st 310 retval = sos_umem_vmm_chprot(my_as, start_uaddr, size, 234 new_acces 311 new_access_rights); 235 312 236 sos_thread_end_user_space_access(); 313 sos_thread_end_user_space_access(); 237 } 314 } 238 break; 315 break; 239 316 240 case SOS_SYSCALL_ID_MRESIZE: 317 case SOS_SYSCALL_ID_MRESIZE: 241 { 318 { 242 sos_uaddr_t old_uaddr; 319 sos_uaddr_t old_uaddr; 243 sos_size_t old_size; 320 sos_size_t old_size; 244 sos_uaddr_t *uptr_new_uaddr; 321 sos_uaddr_t *uptr_new_uaddr; 245 sos_uaddr_t new_uaddr; 322 sos_uaddr_t new_uaddr; 246 sos_size_t new_size; 323 sos_size_t new_size; 247 sos_ui32_t flags; 324 sos_ui32_t flags; 248 struct sos_umem_vmm_as * my_as; 325 struct sos_umem_vmm_as * my_as; 249 326 250 my_as 327 my_as 251 = sos_process_get_address_space(sos_ 328 = sos_process_get_address_space(sos_thread_get_current()->process); 252 329 253 retval = sos_syscall_get5args(user_ctx 330 retval = sos_syscall_get5args(user_ctxt, 254 (unsigne 331 (unsigned int*)& old_uaddr, 255 (unsigne 332 (unsigned int*)& old_size, 256 (unsigne 333 (unsigned int*)& uptr_new_uaddr, 257 (unsigne 334 (unsigned int*)& new_size, 258 (unsigne 335 (unsigned int*)& flags); 259 if (SOS_OK != retval) 336 if (SOS_OK != retval) 260 break; 337 break; 261 338 262 if (sizeof(new_uaddr) != sos_memcpy_fr 339 if (sizeof(new_uaddr) != sos_memcpy_from_user((sos_vaddr_t)& new_uaddr, 263 340 (sos_uaddr_t) 264 341 uptr_new_uaddr, 265 342 sizeof(new_uaddr))) 266 { 343 { 267 retval = -SOS_EFAULT; 344 retval = -SOS_EFAULT; 268 break; 345 break; 269 } 346 } 270 347 271 retval = sos_thread_prepare_user_space 348 retval = sos_thread_prepare_user_space_access(NULL, (sos_vaddr_t)NULL); 272 if (SOS_OK != retval) 349 if (SOS_OK != retval) 273 break; 350 break; 274 351 275 retval = sos_umem_vmm_resize(my_as, ol 352 retval = sos_umem_vmm_resize(my_as, old_uaddr, old_size, 276 & new_uad 353 & new_uaddr, new_size, flags); 277 sos_thread_end_user_space_access(); 354 sos_thread_end_user_space_access(); 278 if (SOS_OK != retval) 355 if (SOS_OK != retval) 279 break; 356 break; 280 357 281 if (sizeof(new_uaddr) 358 if (sizeof(new_uaddr) 282 == sos_memcpy_to_user((sos_uaddr_t 359 == sos_memcpy_to_user((sos_uaddr_t)uptr_new_uaddr, 283 (sos_vaddr_t 360 (sos_vaddr_t)&new_uaddr, 284 sizeof(new_u 361 sizeof(new_uaddr))) 285 { 362 { 286 retval = -SOS_EFAULT; 363 retval = -SOS_EFAULT; 287 break; 364 break; 288 } 365 } 289 } 366 } 290 break; 367 break; 291 368 292 case SOS_SYSCALL_ID_NEW_THREAD: 369 case SOS_SYSCALL_ID_NEW_THREAD: 293 { 370 { 294 sos_uaddr_t start_func; 371 sos_uaddr_t start_func; 295 sos_ui32_t start_arg1, start_arg2; 372 sos_ui32_t start_arg1, start_arg2; 296 sos_size_t stack_size; 373 sos_size_t stack_size; 297 sos_uaddr_t stack_uaddr; 374 sos_uaddr_t stack_uaddr; 298 375 299 struct sos_thread * new_thr; 376 struct sos_thread * new_thr; 300 struct sos_umem_vmm_as * my_as; 377 struct sos_umem_vmm_as * my_as; 301 378 302 my_as 379 my_as 303 = sos_process_get_address_space(sos_ 380 = sos_process_get_address_space(sos_thread_get_current()->process); 304 381 305 retval = sos_syscall_get4args(user_ctx 382 retval = sos_syscall_get4args(user_ctxt, 306 (unsigne 383 (unsigned int*)& start_func, 307 (unsigne 384 (unsigned int*)& start_arg1, 308 (unsigne 385 (unsigned int*)& start_arg2, 309 (unsigne 386 (unsigned int*)& stack_size); 310 if (SOS_OK != retval) 387 if (SOS_OK != retval) 311 break; 388 break; 312 389 313 if (stack_size <= 0) 390 if (stack_size <= 0) 314 { 391 { 315 retval = -SOS_EINVAL; 392 retval = -SOS_EINVAL; 316 break; 393 break; 317 } 394 } 318 395 319 /* Allocate the stack */ 396 /* Allocate the stack */ 320 stack_uaddr = 0; 397 stack_uaddr = 0; 321 stack_size = SOS_PAGE_ALIGN_SUP(stack_ 398 stack_size = SOS_PAGE_ALIGN_SUP(stack_size); 322 retval = sos_dev_zero_map(my_as, & sta 399 retval = sos_dev_zero_map(my_as, & stack_uaddr, stack_size, 323 SOS_VM_MAP_P 400 SOS_VM_MAP_PROT_READ | SOS_VM_MAP_PROT_WRITE, 324 /* PRIVATE * 401 /* PRIVATE */ 0); 325 if (SOS_OK != retval) 402 if (SOS_OK != retval) 326 break; 403 break; 327 404 328 /* Now create the user thread */ 405 /* Now create the user thread */ 329 new_thr = sos_create_user_thread(NULL, 406 new_thr = sos_create_user_thread(NULL, 330 sos_t 407 sos_thread_get_current()->process, 331 start 408 start_func, 332 start 409 start_arg1, 333 start 410 start_arg2, 334 stack 411 stack_uaddr + stack_size - 4, 335 SOS_S 412 SOS_SCHED_PRIO_TS_LOWEST); 336 413 337 if (! new_thr) 414 if (! new_thr) 338 { 415 { 339 sos_umem_vmm_unmap(my_as, stack_ua 416 sos_umem_vmm_unmap(my_as, stack_uaddr, stack_size); 340 retval = -SOS_ENOMEM; 417 retval = -SOS_ENOMEM; 341 break; 418 break; 342 } 419 } 343 << 344 } 420 } 345 break; 421 break; 346 422 347 case SOS_SYSCALL_ID_NANOSLEEP: 423 case SOS_SYSCALL_ID_NANOSLEEP: 348 { 424 { 349 struct sos_time delay; 425 struct sos_time delay; 350 426 351 retval = sos_syscall_get2args(user_ctx 427 retval = sos_syscall_get2args(user_ctxt, 352 (unsigne 428 (unsigned int*)& delay.sec, 353 (unsigne 429 (unsigned int*)& delay.nanosec); 354 if (SOS_OK != retval) 430 if (SOS_OK != retval) 355 break; 431 break; 356 432 357 retval = sos_thread_sleep(& delay); 433 retval = sos_thread_sleep(& delay); 358 } 434 } 359 break; 435 break; 360 436 361 case SOS_SYSCALL_ID_BRK: 437 case SOS_SYSCALL_ID_BRK: 362 { 438 { 363 sos_uaddr_t new_top_heap; 439 sos_uaddr_t new_top_heap; 364 struct sos_umem_vmm_as * my_as; 440 struct sos_umem_vmm_as * my_as; 365 441 366 my_as 442 my_as 367 = sos_process_get_address_space(sos_ 443 = sos_process_get_address_space(sos_thread_get_current()->process); 368 444 369 retval = sos_syscall_get1arg(user_ctxt 445 retval = sos_syscall_get1arg(user_ctxt, 370 (unsigned 446 (unsigned int*)& new_top_heap); 371 if (SOS_OK != retval) 447 if (SOS_OK != retval) 372 break; 448 break; 373 449 374 retval = sos_thread_prepare_user_space 450 retval = sos_thread_prepare_user_space_access(NULL, (sos_vaddr_t)NULL); 375 if (SOS_OK != retval) 451 if (SOS_OK != retval) 376 break; 452 break; 377 453 378 retval = sos_umem_vmm_brk(my_as, new_t 454 retval = sos_umem_vmm_brk(my_as, new_top_heap); 379 sos_thread_end_user_space_access(); 455 sos_thread_end_user_space_access(); 380 } 456 } 381 break; 457 break; 382 458 383 !! 459 case SOS_SYSCALL_ID_BOCHS_WRITE: 384 /** << 385 * File system interface << 386 */ << 387 case SOS_SYSCALL_ID_MOUNT: << 388 { 460 { 389 sos_uaddr_t user_src; !! 461 sos_uaddr_t user_str; 390 sos_size_t srclen; !! 462 sos_size_t len; 391 char * kernel_src = NULL; !! 463 char * str; 392 sos_uaddr_t user_dst; !! 464 retval = sos_syscall_get2args(user_ctxt, & user_str, & len); 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()->proce << 403 retval = sos_syscall_get7args(user_ctx << 404 (unsigne << 405 (unsigne << 406 (unsigne << 407 (unsigne << 408 (unsigne << 409 (unsigne << 410 (unsigne << 411 if (SOS_OK != retval) 465 if (SOS_OK != retval) 412 break; 466 break; 413 467 414 if (user_src != (sos_uaddr_t)NULL) !! 468 str = (char*)sos_kmalloc(len + 1, 0); 415 { !! 469 if (str) 416 retval = sos_strndup_from_user(&ke << 417 if (SOS_OK != retval) << 418 break; << 419 } << 420 << 421 retval = sos_strndup_from_user(&kernel << 422 if (SOS_OK != retval) << 423 { << 424 if (kernel_src) << 425 sos_kfree((sos_vaddr_t)kernel_sr << 426 break; << 427 } << 428 << 429 retval = sos_strndup_from_user(& kerne << 430 if (SOS_OK != retval) << 431 { << 432 if (kernel_src) << 433 sos_kfree((sos_vaddr_t)kernel_sr << 434 sos_kfree((sos_vaddr_t)kernel_dst) << 435 break; << 436 } << 437 << 438 if (user_args != (sos_uaddr_t)NULL) << 439 { 470 { 440 retval = sos_strndup_from_user(& k !! 471 retval = sos_strzcpy_from_user(str, user_str, len+1); 441 if (SOS_OK != retval) !! 472 str[len] = '\0'; >> 473 if (SOS_OK == retval) 442 { 474 { 443 if (kernel_src) !! 475 sos_bochs_printf("THR 0x%x: ", 444 sos_kfree((sos_vaddr_t)kerne !! 476 (unsigned)sos_thread_get_current()); 445 sos_kfree((sos_vaddr_t)kernel_ !! 477 retval = sos_bochs_putstring(str); 446 sos_kfree((sos_vaddr_t)kernel_ !! 478 retval = len; 447 break; << 448 } 479 } >> 480 sos_kfree((sos_vaddr_t)str); 449 } 481 } 450 << 451 retval = sos_fs_mount(proc, kernel_src << 452 kernel_dst, dstl << 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()->proce << 474 retval = sos_syscall_get2args(user_ctx << 475 (unsigne << 476 (unsigne << 477 if (SOS_OK != retval) << 478 break; << 479 << 480 retval = sos_strndup_from_user(&path, << 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_str << 503 char * path; << 504 struct sos_process * proc; << 505 << 506 proc = sos_thread_get_current()->proce << 507 retval = sos_syscall_get3args(user_ctx << 508 (unsigne << 509 (unsigne << 510 (unsigne << 511 if (SOS_OK != retval) << 512 break; << 513 << 514 retval = sos_strndup_from_user(&path, << 515 if (SOS_OK != retval) << 516 break; << 517 << 518 retval = sos_fs_vfstat(proc, path, len << 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_ << 525 (sos_vaddr_t << 526 sizeof(kerne << 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()->proce << 542 retval = sos_syscall_get4args(user_ctx << 543 (unsigne << 544 (unsigne << 545 (unsigne << 546 (unsigne << 547 if (SOS_OK != retval) << 548 break; << 549 << 550 retval = sos_strndup_from_user(&path, << 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_f << 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()->proce << 579 retval = sos_syscall_get1arg(user_ctxt << 580 (unsigned << 581 if (SOS_OK != retval) << 582 break; << 583 << 584 of = sos_process_get_opened_file(proc, << 585 if (NULL == of) << 586 { << 587 retval = -SOS_EBADF; << 588 break; << 589 } << 590 << 591 retval = sos_process_unregister_opened << 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()->proce << 609 retval = sos_syscall_get3args(user_ctx << 610 (unsigne << 611 (unsigne << 612 (unsigne << 613 if (SOS_OK != retval) << 614 break; << 615 << 616 /* Retrieve the value for "buflen" */ << 617 retval = sos_memcpy_from_user((sos_vad << 618 uaddr_bu << 619 sizeof(k << 620 if (sizeof(kernel_buflen) != retval) << 621 { << 622 retval = -SOS_EFAULT; << 623 break; << 624 } << 625 << 626 of = sos_process_get_opened_file(proc, << 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, & << 635 << 636 /* Send successful number of bytes rea << 637 sos_memcpy_to_user(uaddr_buflen, << 638 (sos_vaddr_t)& kern << 639 sizeof(kernel_bufle << 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()->proce << 652 retval = sos_syscall_get2args(user_ctx << 653 (unsigne << 654 (unsigne << 655 if (SOS_OK != retval) << 656 break; << 657 << 658 of = sos_process_get_opened_file(proc, << 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_ << 672 << 673 << 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()->proce << 688 retval = sos_syscall_get3args(user_ctx << 689 (unsigne << 690 (unsigne << 691 (unsigne << 692 if (SOS_OK != retval) << 693 break; << 694 << 695 /* Retrieve the value for "buflen" */ << 696 retval = sos_memcpy_from_user((sos_vad << 697 uaddr_bu << 698 sizeof(k << 699 if (sizeof(kernel_buflen) != retval) << 700 { << 701 retval = -SOS_EFAULT; << 702 break; << 703 } << 704 << 705 of = sos_process_get_opened_file(proc, << 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, & << 714 << 715 /* Send successful number of bytes wri << 716 sos_memcpy_to_user(uaddr_buflen, << 717 (sos_vaddr_t)& kern << 718 sizeof(kernel_bufle << 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_p << 729 int fd; << 730 << 731 proc = sos_thread_get_current()->proce << 732 retval = sos_syscall_get3args(user_ctx << 733 (unsigne << 734 (unsigne << 735 (unsigne << 736 if (SOS_OK != retval) << 737 break; << 738 << 739 /* Retrieve the value for "buflen" */ << 740 retval = sos_memcpy_from_user((sos_vad << 741 uaddr_of << 742 sizeof(k << 743 if (sizeof(kernel_offset) != retval) << 744 { << 745 retval = -SOS_EFAULT; << 746 break; << 747 } << 748 << 749 of = sos_process_get_opened_file(proc, << 750 if (NULL == of) << 751 { << 752 retval = -SOS_EBADF; << 753 break; << 754 } << 755 << 756 /* Do the actual seek */ << 757 retval = sos_fs_seek(of, kernel_offset << 758 << 759 /* Send successful number of bytes wri << 760 sos_memcpy_to_user(uaddr_offset, << 761 (sos_vaddr_t)& resu << 762 sizeof(kernel_offse << 763 } << 764 break; << 765 << 766 case SOS_SYSCALL_ID_FTRUNCATE64: << 767 { << 768 struct sos_fs_opened_file * of; << 769 struct sos_process * proc; << 770 sos_lsoffset_t length; << 771 int fd; << 772 << 773 proc = sos_thread_get_current()->proce << 774 retval = sos_syscall_get2args(user_ctx << 775 (unsigne << 776 (unsigne << 777 if (SOS_OK != retval) << 778 break; << 779 << 780 of = sos_process_get_opened_file(proc, << 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()->proce << 807 retval = sos_syscall_get7args(user_ctx << 808 (unsigne << 809 (unsigne << 810 (unsigne << 811 (unsigne << 812 (unsigne << 813 (unsigne << 814 (unsigne << 815 if (SOS_OK != retval) << 816 break; << 817 << 818 of = sos_process_get_opened_file(proc, << 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_vad << 831 ptr_hint << 832 sizeof(h << 833 if (sizeof(hint_uaddr) != retval) << 834 { << 835 retval = -SOS_EFAULT; << 836 break; << 837 } << 838 << 839 retval = sos_fs_mmap(of, & hint_uaddr, << 840 offset_in_resourc << 841 if (SOS_OK == retval) << 842 { << 843 if (sizeof(hint_uaddr) << 844 != sos_memcpy_to_user(ptr_hint << 845 (sos_vad << 846 sizeof(h << 847 { << 848 sos_umem_vmm_unmap(sos_process << 849 hint_uaddr, << 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()->proce << 864 retval = sos_syscall_get1arg(user_ctxt << 865 (unsigned << 866 if (SOS_OK != retval) << 867 break; << 868 << 869 of = sos_process_get_opened_file(proc, << 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()->proce << 889 retval = sos_syscall_get3args(user_ctx << 890 (unsigne << 891 (unsigne << 892 (unsigne << 893 if (SOS_OK != retval) << 894 break; << 895 << 896 of = sos_process_get_opened_file(proc, << 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()->proce << 916 retval = sos_syscall_get3args(user_ctx << 917 (unsigne << 918 (unsigne << 919 (unsigne << 920 if (SOS_OK != retval) << 921 break; << 922 << 923 of = sos_process_get_opened_file(proc, << 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()->proce << 944 retval = sos_syscall_get3args(user_ctx << 945 (unsigne << 946 (unsigne << 947 (unsigne << 948 if (SOS_OK != retval) << 949 break; << 950 << 951 retval = sos_strndup_from_user(&path, << 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_newpat << 968 struct sos_process * proc; << 969 << 970 proc = sos_thread_get_current()->proce << 971 retval = sos_syscall_get4args(user_ctx << 972 (unsigne << 973 (unsigne << 974 (unsigne << 975 (unsigne << 976 if (SOS_OK != retval) << 977 break; << 978 << 979 retval = sos_strndup_from_user(&kernel << 980 user_ol << 981 oldpath << 982 if (SOS_OK != retval) << 983 break; << 984 << 985 retval = sos_strndup_from_user(&kernel << 986 user_ne << 987 newpath << 988 if (SOS_OK != retval) << 989 { << 990 sos_kfree((sos_vaddr_t) kernel_old << 991 break; << 992 } << 993 << 994 if (syscall_id == SOS_SYSCALL_ID_LINK) << 995 retval = sos_fs_link(proc, << 996 kernel_oldpath, << 997 kernel_newpath, << 998 else 482 else 999 retval = sos_fs_rename(proc, !! 483 retval = -SOS_ENOMEM; 1000 kernel_oldpa << 1001 kernel_newpa << 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()->proc << 1015 retval = sos_syscall_get2args(user_ct << 1016 (unsign << 1017 (unsign << 1018 if (SOS_OK != retval) << 1019 break; << 1020 << 1021 retval = sos_strndup_from_user(&path, << 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_targetpat << 1034 sos_size_t pathlen, targetpathlen; << 1035 char * kernel_path; << 1036 struct sos_process * proc; << 1037 << 1038 proc = sos_thread_get_current()->proc << 1039 retval = sos_syscall_get4args(user_ct << 1040 (unsign << 1041 (unsign << 1042 (unsign << 1043 (unsign << 1044 if (SOS_OK != retval) << 1045 break; << 1046 << 1047 retval = sos_strndup_from_user(&kerne << 1048 user_p << 1049 pathle << 1050 if (SOS_OK != retval) << 1051 break; << 1052 << 1053 retval = sos_fs_symlink(proc, << 1054 kernel_path, << 1055 user_targetpa << 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()->proc << 1071 retval = sos_syscall_get6args(user_ct << 1072 (unsign << 1073 (unsign << 1074 (unsign << 1075 (unsign << 1076 (unsign << 1077 (unsign << 1078 if (SOS_OK != retval) << 1079 break; << 1080 << 1081 retval = sos_strndup_from_user(&path, << 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, << 1089 break; << 1090 << 1091 case SOS_FS_NODE_DIRECTORY: << 1092 retval = sos_fs_mkdir(proc, path, << 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, << 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()->proc << 1122 retval = sos_syscall_get3args(user_ct << 1123 (unsign << 1124 (unsign << 1125 (unsign << 1126 if (SOS_OK != retval) << 1127 break; << 1128 << 1129 retval = sos_strndup_from_user(&path, << 1130 if (SOS_OK != retval) << 1131 break; << 1132 << 1133 retval = sos_fs_mkdir(proc, << 1134 path, len, acce << 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()->proc << 1147 retval = sos_syscall_get2args(user_ct << 1148 (unsign << 1149 (unsign << 1150 if (SOS_OK != retval) << 1151 break; << 1152 << 1153 retval = sos_strndup_from_user(&path, << 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()->proc << 1171 retval = sos_syscall_get3args(user_ct << 1172 (unsign << 1173 (unsign << 1174 (unsign << 1175 if (SOS_OK != retval) << 1176 break; << 1177 << 1178 retval = sos_strndup_from_user(&path, << 1179 if (SOS_OK != retval) << 1180 break; << 1181 << 1182 retval = sos_fs_chmod(proc, path, len << 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()->proc << 1198 retval = sos_syscall_get4args(user_ct << 1199 (unsign << 1200 (unsign << 1201 (unsign << 1202 (unsign << 1203 if (SOS_OK != retval) << 1204 break; << 1205 << 1206 retval = sos_strndup_from_user(&path, << 1207 if (SOS_OK != retval) << 1208 break; << 1209 << 1210 retval = sos_fs_stat(proc, path, len, << 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_s << 1217 (sos_vaddr_ << 1218 sizeof(kern << 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 << 1230 struct sos_process * proc; << 1231 << 1232 proc = sos_thread_get_current()->proc << 1233 retval = sos_syscall_get2args(user_ct << 1234 (unsign << 1235 (unsign << 1236 if (SOS_OK != retval) << 1237 break; << 1238 << 1239 retval = sos_strndup_from_user(&path, << 1240 if (SOS_OK != retval) << 1241 break; << 1242 << 1243 retval = sos_fs_open(proc, << 1244 path, len, << 1245 SOS_FS_OPEN_DIRE << 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_CHRO << 1253 retval = sos_process_chroot(proc, o << 1254 else << 1255 retval = sos_process_chdir(proc, 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 << 1270 struct sos_process * proc; << 1271 int fd; << 1272 << 1273 proc = sos_thread_get_current()->proc << 1274 retval = sos_syscall_get1arg(user_ctx << 1275 (unsigne << 1276 if (SOS_OK != retval) << 1277 break; << 1278 << 1279 of = sos_process_get_opened_file(proc << 1280 if (NULL == of) << 1281 { << 1282 retval = -SOS_EBADF; << 1283 break; << 1284 } << 1285 << 1286 /* Duplicate this FD */ << 1287 retval = sos_fs_duplicate_opened_file << 1288 if (SOS_OK != retval) << 1289 break; << 1290 << 1291 /* Do the actual chdir */ << 1292 retval = sos_process_chdir(proc, new_ << 1293 if (retval < 0) << 1294 { << 1295 sos_fs_close(new_of); << 1296 break; << 1297 } << 1298 << 1299 sos_fs_close(old_of); << 1300 } << 1301 break; << 1302 << 1303 case SOS_SYSCALL_ID_BOCHS_WRITE: << 1304 { << 1305 sos_uaddr_t user_str; << 1306 sos_size_t len; << 1307 char * str; << 1308 retval = sos_syscall_get2args(user_ct << 1309 if (SOS_OK != retval) << 1310 break; << 1311 << 1312 retval = sos_strndup_from_user(& str, << 1313 if (SOS_OK == retval) << 1314 { << 1315 sos_bochs_printf("THR 0x%x: ", << 1316 (unsigned)sos_th << 1317 retval = sos_bochs_putstring(str) << 1318 retval = len; << 1319 sos_kfree((sos_vaddr_t)str); << 1320 } << 1321 } 484 } 1322 break; 485 break; 1323 486 1324 487 1325 /* ************************************ 488 /* *********************************************** 1326 * Debug syscalls (will be removed in t 489 * Debug syscalls (will be removed in the future) 1327 */ 490 */ 1328 491 1329 492 1330 /** 493 /** 1331 * Syscall 4012: hexdump of a user-spac 494 * Syscall 4012: hexdump of a user-space memory region 1332 * args: addr_start size, retval=ignore 495 * args: addr_start size, retval=ignored 1333 */ 496 */ 1334 case 4012: 497 case 4012: 1335 { 498 { 1336 sos_uaddr_t user_str; 499 sos_uaddr_t user_str; 1337 unsigned int len; 500 unsigned int len; 1338 unsigned char * str; 501 unsigned char * str; 1339 502 1340 retval = sos_syscall_get2args(user_ct 503 retval = sos_syscall_get2args(user_ctxt, & user_str, & len); 1341 if (SOS_OK != retval) 504 if (SOS_OK != retval) 1342 break; 505 break; 1343 506 1344 str = (unsigned char*)sos_kmalloc(len !! 507 str = (char*)sos_kmalloc(len + 1, 0); 1345 if (str) 508 if (str) 1346 { 509 { 1347 int i; 510 int i; 1348 sos_bochs_printf("Hexdump(0x%x, % 511 sos_bochs_printf("Hexdump(0x%x, %d):\n", user_str, len); 1349 retval = sos_memcpy_from_user((so 512 retval = sos_memcpy_from_user((sos_vaddr_t) str, user_str, len); 1350 sos_bochs_printf(" (Successfully 513 sos_bochs_printf(" (Successfully copied %d out of %d)\n", 1351 retval, len); 514 retval, len); 1352 515 1353 for (i = 0 ; i < retval ; i++) 516 for (i = 0 ; i < retval ; i++) 1354 { 517 { 1355 if ((i % 32) == 0) 518 if ((i % 32) == 0) 1356 sos_bochs_printf("%x:", i); 519 sos_bochs_printf("%x:", i); 1357 sos_bochs_printf(" %x", str[i 520 sos_bochs_printf(" %x", str[i]); 1358 if (((i+1) % 32) == 0) 521 if (((i+1) % 32) == 0) 1359 sos_bochs_printf("\n"); 522 sos_bochs_printf("\n"); 1360 } 523 } 1361 if (i % 32) 524 if (i % 32) 1362 sos_bochs_printf("\n"); 525 sos_bochs_printf("\n"); 1363 526 1364 sos_kfree((sos_vaddr_t)str); 527 sos_kfree((sos_vaddr_t)str); 1365 } 528 } 1366 else 529 else 1367 retval = -SOS_ENOMEM; 530 retval = -SOS_ENOMEM; 1368 } 531 } 1369 break; 532 break; 1370 533 1371 534 1372 /** 535 /** 1373 * Syscall 4004: lists the VR of the cu 536 * Syscall 4004: lists the VR of the current thread's address space 1374 * args: debug_string, retval=ignored 537 * args: debug_string, retval=ignored 1375 */ 538 */ 1376 case 4004: 539 case 4004: 1377 { 540 { 1378 sos_uaddr_t ustr; 541 sos_uaddr_t ustr; 1379 char * kstr; 542 char * kstr; 1380 struct sos_umem_vmm_as * my_as; 543 struct sos_umem_vmm_as * my_as; 1381 544 1382 retval = sos_syscall_get1arg(user_ctx 545 retval = sos_syscall_get1arg(user_ctxt, & ustr); 1383 if (SOS_OK != retval) 546 if (SOS_OK != retval) 1384 break; 547 break; 1385 548 1386 retval = sos_strndup_from_user(& kstr 549 retval = sos_strndup_from_user(& kstr, ustr, 256, 0); 1387 if (SOS_OK != retval) 550 if (SOS_OK != retval) 1388 break; 551 break; 1389 552 1390 extern void sos_dump_as(const struct 553 extern void sos_dump_as(const struct sos_umem_vmm_as *, const char *); 1391 my_as 554 my_as 1392 = sos_process_get_address_space(sos 555 = sos_process_get_address_space(sos_thread_get_current()->process); 1393 sos_dump_as(my_as, kstr); 556 sos_dump_as(my_as, kstr); 1394 sos_kfree((sos_vaddr_t)kstr); 557 sos_kfree((sos_vaddr_t)kstr); 1395 } 558 } 1396 break; 559 break; 1397 560 1398 561 1399 /** 562 /** 1400 * Syscall 4008: dump the list of proce 563 * Syscall 4008: dump the list of processes in the system 1401 * args: none, retval=ignored 564 * args: none, retval=ignored 1402 */ 565 */ 1403 case 4008: 566 case 4008: 1404 { 567 { 1405 extern void sos_process_dumplist(void 568 extern void sos_process_dumplist(void); 1406 sos_process_dumplist(); 569 sos_process_dumplist(); 1407 retval = SOS_OK; 570 retval = SOS_OK; 1408 } 571 } 1409 break; 572 break; 1410 573 1411 default: 574 default: 1412 sos_bochs_printf("Syscall: UNKNOWN[%d]\ 575 sos_bochs_printf("Syscall: UNKNOWN[%d]\n", syscall_id); 1413 retval = -SOS_ENOSUP; 576 retval = -SOS_ENOSUP; 1414 } 577 } 1415 578 1416 return retval; 579 return retval; 1417 } 580 }
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