1 /* 2 * Copyright (c) 2006 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/types.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/stat.h> 39 #include <sys/mman.h> 40 #include <sys/cons.h> 41 #include <sys/random.h> 42 #include <sys/vkernel.h> 43 #include <sys/tls.h> 44 #include <sys/reboot.h> 45 #include <sys/proc.h> 46 #include <sys/msgbuf.h> 47 #include <sys/vmspace.h> 48 #include <sys/socket.h> 49 #include <sys/sockio.h> 50 #include <sys/sysctl.h> 51 #include <sys/un.h> 52 #include <vm/vm_page.h> 53 #include <vm/vm_map.h> 54 #include <sys/mplock2.h> 55 56 #include <machine/cpu.h> 57 #include <machine/globaldata.h> 58 #include <machine/tls.h> 59 #include <machine/md_var.h> 60 #include <machine/vmparam.h> 61 #include <cpu/specialreg.h> 62 63 #include <net/if.h> 64 #include <net/if_arp.h> 65 #include <net/ethernet.h> 66 #include <net/bridge/if_bridgevar.h> 67 #include <netinet/in.h> 68 #include <arpa/inet.h> 69 #include <net/if_var.h> 70 71 #include <stdio.h> 72 #include <stdlib.h> 73 #include <stdarg.h> 74 #include <stdbool.h> 75 #include <unistd.h> 76 #include <fcntl.h> 77 #include <string.h> 78 #include <err.h> 79 #include <errno.h> 80 #include <assert.h> 81 #include <sysexits.h> 82 83 vm_paddr_t phys_avail[16]; 84 vm_paddr_t Maxmem; 85 vm_paddr_t Maxmem_bytes; 86 long physmem; 87 int MemImageFd = -1; 88 struct vkdisk_info DiskInfo[VKDISK_MAX]; 89 int DiskNum; 90 struct vknetif_info NetifInfo[VKNETIF_MAX]; 91 int NetifNum; 92 char *pid_file; 93 vm_offset_t KvaStart; 94 vm_offset_t KvaEnd; 95 vm_offset_t KvaSize; 96 vm_offset_t virtual_start; 97 vm_offset_t virtual_end; 98 vm_offset_t virtual2_start; 99 vm_offset_t virtual2_end; 100 vm_offset_t kernel_vm_end; 101 vm_offset_t crashdumpmap; 102 vm_offset_t clean_sva; 103 vm_offset_t clean_eva; 104 struct msgbuf *msgbufp; 105 caddr_t ptvmmap; 106 vpte_t *KernelPTD; 107 vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */ 108 void *dmap_min_address; 109 u_int cpu_feature; /* XXX */ 110 int tsc_present; 111 int64_t tsc_frequency; 112 int optcpus; /* number of cpus - see mp_start() */ 113 int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */ 114 int real_ncpus; /* number of real CPUs */ 115 int next_cpu; /* next real CPU to lock a virtual CPU to */ 116 int vkernel_b_arg; /* -b argument - no of logical CPU bits - only SMP */ 117 int vkernel_B_arg; /* -B argument - no of core bits - only SMP */ 118 119 struct privatespace *CPU_prvspace; 120 121 static struct trapframe proc0_tf; 122 static void *proc0paddr; 123 124 static void init_sys_memory(char *imageFile); 125 static void init_kern_memory(void); 126 static void init_globaldata(void); 127 static void init_vkernel(void); 128 static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type); 129 static void init_netif(char *netifExp[], int netifFileNum); 130 static void writepid(void); 131 static void cleanpid(void); 132 static int unix_connect(const char *path); 133 static void usage_err(const char *ctl, ...); 134 static void usage_help(_Bool); 135 static void init_locks(void); 136 137 static int save_ac; 138 static char **save_av; 139 140 /* 141 * Kernel startup for virtual kernels - standard main() 142 */ 143 int 144 main(int ac, char **av) 145 { 146 char *memImageFile = NULL; 147 char *netifFile[VKNETIF_MAX]; 148 char *diskFile[VKDISK_MAX]; 149 char *cdFile[VKDISK_MAX]; 150 char *suffix; 151 char *endp; 152 char *tmp; 153 char *tok; 154 int netifFileNum = 0; 155 int diskFileNum = 0; 156 int cdFileNum = 0; 157 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */ 158 int c; 159 int i; 160 int j; 161 int n; 162 int isq; 163 int pos; 164 int eflag; 165 int real_vkernel_enable; 166 int supports_sse; 167 size_t vsize; 168 size_t kenv_size; 169 size_t kenv_size2; 170 171 save_ac = ac; 172 save_av = av; 173 eflag = 0; 174 pos = 0; 175 kenv_size = 0; 176 177 /* 178 * Process options 179 */ 180 kernel_mem_readonly = 1; 181 optcpus = 2; 182 vkernel_b_arg = 0; 183 vkernel_B_arg = 0; 184 lwp_cpu_lock = LCL_NONE; 185 186 real_vkernel_enable = 0; 187 vsize = sizeof(real_vkernel_enable); 188 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0); 189 190 if (real_vkernel_enable == 0) { 191 errx(1, "vm.vkernel_enable is 0, must be set " 192 "to 1 to execute a vkernel!"); 193 } 194 195 real_ncpus = 1; 196 vsize = sizeof(real_ncpus); 197 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0); 198 199 if (ac < 2) 200 usage_help(false); 201 202 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:Ub:B:")) != -1) { 203 switch(c) { 204 case 'e': 205 /* 206 * name=value:name=value:name=value... 207 * name="value"... 208 * 209 * Allow values to be quoted but note that shells 210 * may remove the quotes, so using this feature 211 * to embed colons may require a backslash. 212 */ 213 n = strlen(optarg); 214 isq = 0; 215 216 if (eflag == 0) { 217 kenv_size = n + 2; 218 kern_envp = malloc(kenv_size); 219 if (kern_envp == NULL) 220 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size); 221 } else { 222 kenv_size2 = kenv_size + n + 1; 223 pos = kenv_size - 1; 224 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL) 225 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2); 226 kern_envp = tmp; 227 kenv_size = kenv_size2; 228 } 229 230 for (i = 0, j = pos; i < n; ++i) { 231 if (optarg[i] == '"') 232 isq ^= 1; 233 else if (optarg[i] == '\'') 234 isq ^= 2; 235 else if (isq == 0 && optarg[i] == ':') 236 kern_envp[j++] = 0; 237 else 238 kern_envp[j++] = optarg[i]; 239 } 240 kern_envp[j++] = 0; 241 kern_envp[j++] = 0; 242 eflag++; 243 break; 244 case 's': 245 boothowto |= RB_SINGLE; 246 break; 247 case 'v': 248 bootverbose = 1; 249 break; 250 case 'i': 251 memImageFile = optarg; 252 break; 253 case 'I': 254 if (netifFileNum < VKNETIF_MAX) 255 netifFile[netifFileNum++] = strdup(optarg); 256 break; 257 case 'r': 258 if (bootOnDisk < 0) 259 bootOnDisk = 1; 260 if (diskFileNum + cdFileNum < VKDISK_MAX) 261 diskFile[diskFileNum++] = strdup(optarg); 262 break; 263 case 'c': 264 if (bootOnDisk < 0) 265 bootOnDisk = 0; 266 if (diskFileNum + cdFileNum < VKDISK_MAX) 267 cdFile[cdFileNum++] = strdup(optarg); 268 break; 269 case 'm': 270 Maxmem_bytes = strtoull(optarg, &suffix, 0); 271 if (suffix) { 272 switch(*suffix) { 273 case 'g': 274 case 'G': 275 Maxmem_bytes <<= 30; 276 break; 277 case 'm': 278 case 'M': 279 Maxmem_bytes <<= 20; 280 break; 281 case 'k': 282 case 'K': 283 Maxmem_bytes <<= 10; 284 break; 285 default: 286 Maxmem_bytes = 0; 287 usage_err("Bad maxmem option"); 288 /* NOT REACHED */ 289 break; 290 } 291 } 292 break; 293 case 'l': 294 next_cpu = -1; 295 if (strncmp("map", optarg, 3) == 0) { 296 lwp_cpu_lock = LCL_PER_CPU; 297 if (optarg[3] == ',') { 298 next_cpu = strtol(optarg+4, &endp, 0); 299 if (*endp != '\0') 300 usage_err("Bad target CPU number at '%s'", endp); 301 } else { 302 next_cpu = 0; 303 } 304 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 305 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 306 } else if (strncmp("any", optarg, 3) == 0) { 307 lwp_cpu_lock = LCL_NONE; 308 } else { 309 lwp_cpu_lock = LCL_SINGLE_CPU; 310 next_cpu = strtol(optarg, &endp, 0); 311 if (*endp != '\0') 312 usage_err("Bad target CPU number at '%s'", endp); 313 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 314 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 315 } 316 break; 317 case 'n': 318 /* 319 * This value is set up by mp_start(), don't just 320 * set ncpus here. 321 */ 322 tok = strtok(optarg, ":"); 323 optcpus = strtol(tok, NULL, 0); 324 if (optcpus < 1 || optcpus > MAXCPU) 325 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU); 326 327 /* :lbits argument */ 328 tok = strtok(NULL, ":"); 329 if (tok != NULL) { 330 vkernel_b_arg = strtol(tok, NULL, 0); 331 332 /* :cbits argument */ 333 tok = strtok(NULL, ":"); 334 if (tok != NULL) { 335 vkernel_B_arg = strtol(tok, NULL, 0); 336 } 337 338 } 339 break; 340 case 'p': 341 pid_file = optarg; 342 break; 343 case 'U': 344 kernel_mem_readonly = 0; 345 break; 346 case 'h': 347 usage_help(true); 348 break; 349 default: 350 usage_help(false); 351 } 352 } 353 354 writepid(); 355 cpu_disable_intr(); 356 init_sys_memory(memImageFile); 357 init_kern_memory(); 358 init_globaldata(); 359 init_vkernel(); 360 setrealcpu(); 361 init_kqueue(); 362 363 vmm_guest = 1; 364 365 /* 366 * Check TSC 367 */ 368 vsize = sizeof(tsc_present); 369 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0); 370 vsize = sizeof(tsc_frequency); 371 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0); 372 if (tsc_present) 373 cpu_feature |= CPUID_TSC; 374 375 /* 376 * Check SSE 377 */ 378 vsize = sizeof(supports_sse); 379 supports_sse = 0; 380 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0); 381 init_fpu(supports_sse); 382 if (supports_sse) 383 cpu_feature |= CPUID_SSE | CPUID_FXSR; 384 385 /* 386 * We boot from the first installed disk. 387 */ 388 if (bootOnDisk == 1) { 389 init_disk(diskFile, diskFileNum, VKD_DISK); 390 init_disk(cdFile, cdFileNum, VKD_CD); 391 } else { 392 init_disk(cdFile, cdFileNum, VKD_CD); 393 init_disk(diskFile, diskFileNum, VKD_DISK); 394 } 395 init_netif(netifFile, netifFileNum); 396 init_exceptions(); 397 mi_startup(); 398 /* NOT REACHED */ 399 exit(EX_SOFTWARE); 400 } 401 402 /* 403 * Initialize system memory. This is the virtual kernel's 'RAM'. 404 */ 405 static 406 void 407 init_sys_memory(char *imageFile) 408 { 409 struct stat st; 410 int i; 411 int fd; 412 413 /* 414 * Figure out the system memory image size. If an image file was 415 * specified and -m was not specified, use the image file's size. 416 */ 417 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0) 418 Maxmem_bytes = (vm_paddr_t)st.st_size; 419 if ((imageFile == NULL || stat(imageFile, &st) < 0) && 420 Maxmem_bytes == 0) { 421 errx(1, "Cannot create new memory file %s unless " 422 "system memory size is specified with -m", 423 imageFile); 424 /* NOT REACHED */ 425 } 426 427 /* 428 * Maxmem must be known at this time 429 */ 430 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 431 errx(1, "Bad maxmem specification: 64MB minimum, " 432 "multiples of %dMB only", 433 SEG_SIZE / 1024 / 1024); 434 /* NOT REACHED */ 435 } 436 437 /* 438 * Generate an image file name if necessary, then open/create the 439 * file exclusively locked. Do not allow multiple virtual kernels 440 * to use the same image file. 441 * 442 * Don't iterate through a million files if we do not have write 443 * access to the directory, stop if our open() failed on a 444 * non-existant file. Otherwise opens can fail for any number 445 */ 446 if (imageFile == NULL) { 447 for (i = 0; i < 1000000; ++i) { 448 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i); 449 fd = open(imageFile, 450 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 451 if (fd < 0 && stat(imageFile, &st) == 0) { 452 free(imageFile); 453 continue; 454 } 455 break; 456 } 457 } else { 458 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 459 } 460 fprintf(stderr, "Using memory file: %s\n", imageFile); 461 if (fd < 0 || fstat(fd, &st) < 0) { 462 err(1, "Unable to open/create %s", imageFile); 463 /* NOT REACHED */ 464 } 465 466 /* 467 * Truncate or extend the file as necessary. Clean out the contents 468 * of the file, we want it to be full of holes so we don't waste 469 * time reading in data from an old file that we no longer care 470 * about. 471 */ 472 ftruncate(fd, 0); 473 ftruncate(fd, Maxmem_bytes); 474 475 MemImageFd = fd; 476 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 477 physmem = Maxmem; 478 } 479 480 /* 481 * Initialize kernel memory. This reserves kernel virtual memory by using 482 * MAP_VPAGETABLE 483 */ 484 485 static 486 void 487 init_kern_memory(void) 488 { 489 void *base; 490 void *try; 491 char dummy; 492 char *topofstack = &dummy; 493 int i; 494 void *firstfree; 495 496 /* 497 * Memory map our kernel virtual memory space. Note that the 498 * kernel image itself is not made part of this memory for the 499 * moment. 500 * 501 * The memory map must be segment-aligned so we can properly 502 * offset KernelPTD. 503 * 504 * If the system kernel has a different MAXDSIZ, it might not 505 * be possible to map kernel memory in its prefered location. 506 * Try a number of different locations. 507 */ 508 try = (void *)(512UL << 30); 509 base = NULL; 510 while ((char *)try + KERNEL_KVA_SIZE < topofstack) { 511 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE, 512 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE, 513 MemImageFd, (off_t)try); 514 if (base == try) 515 break; 516 if (base != MAP_FAILED) 517 munmap(base, KERNEL_KVA_SIZE); 518 try = (char *)try + (512UL << 30); 519 } 520 if (base != try) { 521 err(1, "Unable to mmap() kernel virtual memory!"); 522 /* NOT REACHED */ 523 } 524 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC); 525 KvaStart = (vm_offset_t)base; 526 KvaSize = KERNEL_KVA_SIZE; 527 KvaEnd = KvaStart + KvaSize; 528 529 /* cannot use kprintf yet */ 530 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd); 531 532 /* MAP_FILE? */ 533 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE, 534 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED, 535 MemImageFd, 0); 536 if (dmap_min_address == MAP_FAILED) { 537 err(1, "Unable to mmap() kernel DMAP region!"); 538 /* NOT REACHED */ 539 } 540 541 /* 542 * Bootstrap the kernel_pmap 543 */ 544 firstfree = NULL; 545 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base); 546 547 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP, 548 0 | VPTE_R | VPTE_W | VPTE_V); 549 550 /* 551 * phys_avail[] represents unallocated physical memory. MI code 552 * will use phys_avail[] to create the vm_page array. 553 */ 554 phys_avail[0] = (vm_paddr_t)firstfree; 555 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK; 556 phys_avail[1] = Maxmem_bytes; 557 558 #if JGV 559 /* 560 * (virtual_start, virtual_end) represent unallocated kernel virtual 561 * memory. MI code will create kernel_map using these parameters. 562 */ 563 virtual_start = KvaStart + (long)firstfree; 564 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK; 565 virtual_end = KvaStart + KERNEL_KVA_SIZE; 566 #endif 567 568 /* 569 * pmap_growkernel() will set the correct value. 570 */ 571 kernel_vm_end = 0; 572 573 /* 574 * Allocate space for process 0's UAREA. 575 */ 576 proc0paddr = (void *)virtual_start; 577 for (i = 0; i < UPAGES; ++i) { 578 pmap_kenter_quick(virtual_start, phys_avail[0]); 579 virtual_start += PAGE_SIZE; 580 phys_avail[0] += PAGE_SIZE; 581 } 582 583 /* 584 * crashdumpmap 585 */ 586 crashdumpmap = virtual_start; 587 virtual_start += MAXDUMPPGS * PAGE_SIZE; 588 589 /* 590 * msgbufp maps the system message buffer 591 */ 592 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 593 msgbufp = (void *)virtual_start; 594 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 595 pmap_kenter_quick(virtual_start, phys_avail[0]); 596 virtual_start += PAGE_SIZE; 597 phys_avail[0] += PAGE_SIZE; 598 } 599 msgbufinit(msgbufp, MSGBUF_SIZE); 600 601 /* 602 * used by kern_memio for /dev/mem access 603 */ 604 ptvmmap = (caddr_t)virtual_start; 605 virtual_start += PAGE_SIZE; 606 } 607 608 /* 609 * Map the per-cpu globaldata for cpu #0. Allocate the space using 610 * virtual_start and phys_avail[0] 611 */ 612 static 613 void 614 init_globaldata(void) 615 { 616 int i; 617 vm_paddr_t pa; 618 vm_offset_t va; 619 620 /* 621 * Reserve enough KVA to cover possible cpus. This is a considerable 622 * amount of KVA since the privatespace structure includes two 623 * whole page table mappings. 624 */ 625 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK; 626 CPU_prvspace = (void *)virtual_start; 627 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU; 628 629 /* 630 * Allocate enough physical memory to cover the mdglobaldata 631 * portion of the space and the idle stack and map the pages 632 * into KVA. For cpu #0 only. 633 */ 634 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) { 635 pa = phys_avail[0]; 636 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i; 637 pmap_kenter_quick(va, pa); 638 phys_avail[0] += PAGE_SIZE; 639 } 640 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) { 641 pa = phys_avail[0]; 642 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i; 643 pmap_kenter_quick(va, pa); 644 phys_avail[0] += PAGE_SIZE; 645 } 646 647 /* 648 * Setup the %gs for cpu #0. The mycpu macro works after this 649 * point. Note that %fs is used by pthreads. 650 */ 651 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace)); 652 } 653 654 655 /* 656 * Initialize pool tokens and other necessary locks 657 */ 658 static void 659 init_locks(void) 660 { 661 662 /* 663 * Get the initial mplock with a count of 1 for the BSP. 664 * This uses a LOGICAL cpu ID, ie BSP == 0. 665 */ 666 cpu_get_initial_mplock(); 667 668 /* our token pool needs to work early */ 669 lwkt_token_pool_init(); 670 671 } 672 673 674 /* 675 * Initialize very low level systems including thread0, proc0, etc. 676 */ 677 static 678 void 679 init_vkernel(void) 680 { 681 struct mdglobaldata *gd; 682 683 gd = &CPU_prvspace[0].mdglobaldata; 684 bzero(gd, sizeof(*gd)); 685 686 gd->mi.gd_curthread = &thread0; 687 thread0.td_gd = &gd->mi; 688 ncpus = 1; 689 ncpus2 = 1; /* rounded down power of 2 */ 690 ncpus_fit = 1; /* rounded up power of 2 */ 691 /* ncpus2_mask and ncpus_fit_mask are 0 */ 692 init_param1(); 693 gd->mi.gd_prvspace = &CPU_prvspace[0]; 694 mi_gdinit(&gd->mi, 0); 695 cpu_gdinit(gd, 0); 696 mi_proc0init(&gd->mi, proc0paddr); 697 lwp0.lwp_md.md_regs = &proc0_tf; 698 699 init_locks(); 700 cninit(); 701 rand_initialize(); 702 #if 0 /* #ifdef DDB */ 703 kdb_init(); 704 if (boothowto & RB_KDB) 705 Debugger("Boot flags requested debugger"); 706 #endif 707 identcpu(); 708 #if 0 709 initializecpu(); /* Initialize CPU registers */ 710 #endif 711 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE); 712 713 #if 0 714 /* 715 * Map the message buffer 716 */ 717 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 718 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off); 719 msgbufinit(msgbufp, MSGBUF_SIZE); 720 #endif 721 #if 0 722 thread0.td_pcb_cr3 ... MMU 723 lwp0.lwp_md.md_regs = &proc0_tf; 724 #endif 725 } 726 727 /* 728 * Filesystem image paths for the virtual kernel are optional. 729 * If specified they each should point to a disk image, 730 * the first of which will become the root disk. 731 * 732 * The virtual kernel caches data from our 'disk' just like a normal kernel, 733 * so we do not really want the real kernel to cache the data too. Use 734 * O_DIRECT to remove the duplication. 735 */ 736 static 737 void 738 init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type) 739 { 740 char *serno; 741 int i; 742 743 if (diskFileNum == 0) 744 return; 745 746 for(i=0; i < diskFileNum; i++){ 747 char *fname; 748 fname = diskExp[i]; 749 750 if (fname == NULL) { 751 warnx("Invalid argument to '-r'"); 752 continue; 753 } 754 /* 755 * Check for a serial number for the virtual disk 756 * passed from the command line. 757 */ 758 serno = fname; 759 strsep(&serno, ":"); 760 761 if (DiskNum < VKDISK_MAX) { 762 struct stat st; 763 struct vkdisk_info* info = NULL; 764 int fd; 765 size_t l = 0; 766 767 if (type == VKD_DISK) 768 fd = open(fname, O_RDWR|O_DIRECT, 0644); 769 else 770 fd = open(fname, O_RDONLY|O_DIRECT, 0644); 771 if (fd < 0 || fstat(fd, &st) < 0) { 772 err(1, "Unable to open/create %s", fname); 773 /* NOT REACHED */ 774 } 775 if (S_ISREG(st.st_mode)) { 776 if (flock(fd, LOCK_EX|LOCK_NB) < 0) { 777 errx(1, "Disk image %s is already " 778 "in use\n", fname); 779 /* NOT REACHED */ 780 } 781 } 782 783 info = &DiskInfo[DiskNum]; 784 l = strlen(fname); 785 786 info->unit = i; 787 info->fd = fd; 788 info->type = type; 789 memcpy(info->fname, fname, l); 790 info->serno = NULL; 791 if (serno) { 792 if ((info->serno = malloc(SERNOLEN)) != NULL) 793 strlcpy(info->serno, serno, SERNOLEN); 794 else 795 warnx("Couldn't allocate memory for the operation"); 796 } 797 798 if (DiskNum == 0) { 799 if (type == VKD_CD) { 800 rootdevnames[0] = "cd9660:vcd0a"; 801 } else if (type == VKD_DISK) { 802 rootdevnames[0] = "ufs:vkd0s0a"; 803 rootdevnames[1] = "ufs:vkd0s1a"; 804 } 805 } 806 807 DiskNum++; 808 } else { 809 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname); 810 continue; 811 } 812 } 813 } 814 815 static 816 int 817 netif_set_tapflags(int tap_unit, int f, int s) 818 { 819 struct ifreq ifr; 820 int flags; 821 822 bzero(&ifr, sizeof(ifr)); 823 824 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 825 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { 826 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit); 827 return -1; 828 } 829 830 /* 831 * Adjust if_flags 832 * 833 * If the flags are already set/cleared, then we return 834 * immediately to avoid extra syscalls 835 */ 836 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); 837 if (f < 0) { 838 /* Turn off flags */ 839 f = -f; 840 if ((flags & f) == 0) 841 return 0; 842 flags &= ~f; 843 } else { 844 /* Turn on flags */ 845 if (flags & f) 846 return 0; 847 flags |= f; 848 } 849 850 /* 851 * Fix up ifreq.ifr_name, since it may be trashed 852 * in previous ioctl(SIOCGIFFLAGS) 853 */ 854 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 855 856 ifr.ifr_flags = flags & 0xffff; 857 ifr.ifr_flagshigh = flags >> 16; 858 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) { 859 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit); 860 return -1; 861 } 862 return 0; 863 } 864 865 static 866 int 867 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s) 868 { 869 struct ifaliasreq ifra; 870 struct sockaddr_in *in; 871 872 bzero(&ifra, sizeof(ifra)); 873 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit); 874 875 /* Setup address */ 876 in = (struct sockaddr_in *)&ifra.ifra_addr; 877 in->sin_family = AF_INET; 878 in->sin_len = sizeof(*in); 879 in->sin_addr.s_addr = addr; 880 881 if (mask != 0) { 882 /* Setup netmask */ 883 in = (struct sockaddr_in *)&ifra.ifra_mask; 884 in->sin_len = sizeof(*in); 885 in->sin_addr.s_addr = mask; 886 } 887 888 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) { 889 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit); 890 return -1; 891 } 892 return 0; 893 } 894 895 static 896 int 897 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s) 898 { 899 struct ifbreq ifbr; 900 struct ifdrv ifd; 901 902 bzero(&ifbr, sizeof(ifbr)); 903 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname), 904 "tap%d", tap_unit); 905 906 bzero(&ifd, sizeof(ifd)); 907 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name)); 908 ifd.ifd_cmd = BRDGADD; 909 ifd.ifd_len = sizeof(ifbr); 910 ifd.ifd_data = &ifbr; 911 912 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) { 913 /* 914 * 'errno == EEXIST' means that the tap(4) is already 915 * a member of the bridge(4) 916 */ 917 if (errno != EEXIST) { 918 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge); 919 return -1; 920 } 921 } 922 return 0; 923 } 924 925 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK) 926 927 /* 928 * Locate the first unused tap(4) device file if auto mode is requested, 929 * or open the user supplied device file, and bring up the corresponding 930 * tap(4) interface. 931 * 932 * NOTE: Only tap(4) device file is supported currently 933 */ 934 static 935 int 936 netif_open_tap(const char *netif, int *tap_unit, int s) 937 { 938 char tap_dev[MAXPATHLEN]; 939 int tap_fd, failed; 940 struct stat st; 941 char *dname; 942 943 *tap_unit = -1; 944 945 if (strcmp(netif, "auto") == 0) { 946 /* 947 * Find first unused tap(4) device file 948 */ 949 tap_fd = open("/dev/tap", TAPDEV_OFLAGS); 950 if (tap_fd < 0) { 951 warnc(errno, "Unable to find a free tap(4)"); 952 return -1; 953 } 954 } else { 955 /* 956 * User supplied tap(4) device file or unix socket. 957 */ 958 if (netif[0] == '/') /* Absolute path */ 959 strlcpy(tap_dev, netif, sizeof(tap_dev)); 960 else 961 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif); 962 963 tap_fd = open(tap_dev, TAPDEV_OFLAGS); 964 965 /* 966 * If we cannot open normally try to connect to it. 967 */ 968 if (tap_fd < 0) 969 tap_fd = unix_connect(tap_dev); 970 971 if (tap_fd < 0) { 972 warn("Unable to open %s", tap_dev); 973 return -1; 974 } 975 } 976 977 /* 978 * Check whether the device file is a tap(4) 979 */ 980 if (fstat(tap_fd, &st) < 0) { 981 failed = 1; 982 } else if (S_ISCHR(st.st_mode)) { 983 dname = fdevname(tap_fd); 984 if (dname) 985 dname = strstr(dname, "tap"); 986 if (dname) { 987 /* 988 * Bring up the corresponding tap(4) interface 989 */ 990 *tap_unit = strtol(dname + 3, NULL, 10); 991 printf("TAP UNIT %d\n", *tap_unit); 992 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0) 993 failed = 0; 994 else 995 failed = 1; 996 } else { 997 failed = 1; 998 } 999 } else if (S_ISSOCK(st.st_mode)) { 1000 /* 1001 * Special socket connection (typically to vknet). We 1002 * do not have to do anything. 1003 */ 1004 failed = 0; 1005 } else { 1006 failed = 1; 1007 } 1008 1009 if (failed) { 1010 warnx("%s is not a tap(4) device or socket", tap_dev); 1011 close(tap_fd); 1012 tap_fd = -1; 1013 *tap_unit = -1; 1014 } 1015 return tap_fd; 1016 } 1017 1018 static int 1019 unix_connect(const char *path) 1020 { 1021 struct sockaddr_un sunx; 1022 int len; 1023 int net_fd; 1024 int sndbuf = 262144; 1025 struct stat st; 1026 1027 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path); 1028 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]); 1029 ++len; /* include nul */ 1030 sunx.sun_family = AF_UNIX; 1031 sunx.sun_len = len; 1032 1033 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); 1034 if (net_fd < 0) 1035 return(-1); 1036 if (connect(net_fd, (void *)&sunx, len) < 0) { 1037 close(net_fd); 1038 return(-1); 1039 } 1040 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)); 1041 if (fstat(net_fd, &st) == 0) 1042 printf("Network socket buffer: %d bytes\n", st.st_blksize); 1043 fcntl(net_fd, F_SETFL, O_NONBLOCK); 1044 return(net_fd); 1045 } 1046 1047 #undef TAPDEV_MAJOR 1048 #undef TAPDEV_MINOR 1049 #undef TAPDEV_OFLAGS 1050 1051 /* 1052 * Following syntax is supported, 1053 * 1) x.x.x.x tap(4)'s address is x.x.x.x 1054 * 1055 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x 1056 * tap(4)'s netmask len is z 1057 * 1058 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x 1059 * pseudo netif's address is y.y.y.y 1060 * 1061 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x 1062 * pseudo netif's address is y.y.y.y 1063 * tap(4) and pseudo netif's netmask len are z 1064 * 1065 * 5) bridgeX tap(4) will be added to bridgeX 1066 * 1067 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX 1068 * pseudo netif's address is y.y.y.y 1069 * 1070 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX 1071 * pseudo netif's address is y.y.y.y 1072 * pseudo netif's netmask len is z 1073 */ 1074 static 1075 int 1076 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s) 1077 { 1078 in_addr_t tap_addr, netmask, netif_addr; 1079 int next_netif_addr; 1080 char *tok, *masklen_str, *ifbridge; 1081 1082 *addr = 0; 1083 *mask = 0; 1084 1085 tok = strtok(NULL, ":/"); 1086 if (tok == NULL) { 1087 /* 1088 * Nothing special, simply use tap(4) as backend 1089 */ 1090 return 0; 1091 } 1092 1093 if (inet_pton(AF_INET, tok, &tap_addr) > 0) { 1094 /* 1095 * tap(4)'s address is supplied 1096 */ 1097 ifbridge = NULL; 1098 1099 /* 1100 * If there is next token, then it may be pseudo 1101 * netif's address or netmask len for tap(4) 1102 */ 1103 next_netif_addr = 0; 1104 } else { 1105 /* 1106 * Not tap(4)'s address, assume it as a bridge(4) 1107 * iface name 1108 */ 1109 tap_addr = 0; 1110 ifbridge = tok; 1111 1112 /* 1113 * If there is next token, then it must be pseudo 1114 * netif's address 1115 */ 1116 next_netif_addr = 1; 1117 } 1118 1119 netmask = netif_addr = 0; 1120 1121 tok = strtok(NULL, ":/"); 1122 if (tok == NULL) 1123 goto back; 1124 1125 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) { 1126 if (next_netif_addr) { 1127 warnx("Invalid pseudo netif address: %s", tok); 1128 return -1; 1129 } 1130 netif_addr = 0; 1131 1132 /* 1133 * Current token is not address, then it must be netmask len 1134 */ 1135 masklen_str = tok; 1136 } else { 1137 /* 1138 * Current token is pseudo netif address, if there is next token 1139 * it must be netmask len 1140 */ 1141 masklen_str = strtok(NULL, "/"); 1142 } 1143 1144 /* Calculate netmask */ 1145 if (masklen_str != NULL) { 1146 u_long masklen; 1147 1148 masklen = strtoul(masklen_str, NULL, 10); 1149 if (masklen < 32 && masklen > 0) { 1150 netmask = htonl(~((1LL << (32 - masklen)) - 1) 1151 & 0xffffffff); 1152 } else { 1153 warnx("Invalid netmask len: %lu", masklen); 1154 return -1; 1155 } 1156 } 1157 1158 /* Make sure there is no more token left */ 1159 if (strtok(NULL, ":/") != NULL) { 1160 warnx("Invalid argument to '-I'"); 1161 return -1; 1162 } 1163 1164 back: 1165 if (tap_unit < 0) { 1166 /* Do nothing */ 1167 } else if (ifbridge == NULL) { 1168 /* Set tap(4) address/netmask */ 1169 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0) 1170 return -1; 1171 } else { 1172 /* Tie tap(4) to bridge(4) */ 1173 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0) 1174 return -1; 1175 } 1176 1177 *addr = netif_addr; 1178 *mask = netmask; 1179 return 0; 1180 } 1181 1182 /* 1183 * NetifInfo[] will be filled for pseudo netif initialization. 1184 * NetifNum will be bumped to reflect the number of valid entries 1185 * in NetifInfo[]. 1186 */ 1187 static 1188 void 1189 init_netif(char *netifExp[], int netifExpNum) 1190 { 1191 int i, s; 1192 char *tmp; 1193 1194 if (netifExpNum == 0) 1195 return; 1196 1197 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */ 1198 if (s < 0) 1199 return; 1200 1201 for (i = 0; i < netifExpNum; ++i) { 1202 struct vknetif_info *info; 1203 in_addr_t netif_addr, netif_mask; 1204 int tap_fd, tap_unit; 1205 char *netif; 1206 1207 /* Extract MAC address if there is one */ 1208 tmp = netifExp[i]; 1209 strsep(&tmp, "="); 1210 1211 netif = strtok(netifExp[i], ":"); 1212 if (netif == NULL) { 1213 warnx("Invalid argument to '-I'"); 1214 continue; 1215 } 1216 1217 /* 1218 * Open tap(4) device file and bring up the 1219 * corresponding interface 1220 */ 1221 tap_fd = netif_open_tap(netif, &tap_unit, s); 1222 if (tap_fd < 0) 1223 continue; 1224 1225 /* 1226 * Initialize tap(4) and get address/netmask 1227 * for pseudo netif 1228 * 1229 * NB: Rest part of netifExp[i] is passed 1230 * to netif_init_tap() implicitly. 1231 */ 1232 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) { 1233 /* 1234 * NB: Closing tap(4) device file will bring 1235 * down the corresponding interface 1236 */ 1237 close(tap_fd); 1238 continue; 1239 } 1240 1241 info = &NetifInfo[NetifNum]; 1242 bzero(info, sizeof(*info)); 1243 info->tap_fd = tap_fd; 1244 info->tap_unit = tap_unit; 1245 info->netif_addr = netif_addr; 1246 info->netif_mask = netif_mask; 1247 /* 1248 * If tmp isn't NULL it means a MAC could have been 1249 * specified so attempt to convert it. 1250 * Setting enaddr to NULL will tell vke_attach() we 1251 * need a pseudo-random MAC address. 1252 */ 1253 if (tmp != NULL) { 1254 if ((info->enaddr = malloc(ETHER_ADDR_LEN)) == NULL) 1255 warnx("Couldn't allocate memory for the operation"); 1256 else { 1257 if ((kether_aton(tmp, info->enaddr)) == NULL) { 1258 free(info->enaddr); 1259 info->enaddr = NULL; 1260 } 1261 } 1262 } 1263 1264 NetifNum++; 1265 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */ 1266 break; 1267 } 1268 close(s); 1269 } 1270 1271 /* 1272 * Create the pid file and leave it open and locked while the vkernel is 1273 * running. This allows a script to use /usr/bin/lockf to probe whether 1274 * a vkernel is still running (so as not to accidently kill an unrelated 1275 * process from a stale pid file). 1276 */ 1277 static 1278 void 1279 writepid(void) 1280 { 1281 char buf[32]; 1282 int fd; 1283 1284 if (pid_file != NULL) { 1285 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid()); 1286 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666); 1287 if (fd < 0) { 1288 if (errno == EWOULDBLOCK) { 1289 perror("Failed to lock pidfile, " 1290 "vkernel already running"); 1291 } else { 1292 perror("Failed to create pidfile"); 1293 } 1294 exit(EX_SOFTWARE); 1295 } 1296 ftruncate(fd, 0); 1297 write(fd, buf, strlen(buf)); 1298 /* leave the file open to maintain the lock */ 1299 } 1300 } 1301 1302 static 1303 void 1304 cleanpid( void ) 1305 { 1306 if (pid_file != NULL) { 1307 if (unlink(pid_file) < 0) 1308 perror("Warning: couldn't remove pidfile"); 1309 } 1310 } 1311 1312 static 1313 void 1314 usage_err(const char *ctl, ...) 1315 { 1316 va_list va; 1317 1318 va_start(va, ctl); 1319 vfprintf(stderr, ctl, va); 1320 va_end(va); 1321 fprintf(stderr, "\n"); 1322 exit(EX_USAGE); 1323 } 1324 1325 static 1326 void 1327 usage_help(_Bool help) 1328 { 1329 fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n" 1330 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n" 1331 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n" 1332 "\t[-p file] [-r file]\n", save_av[0]); 1333 1334 if (help) 1335 fprintf(stderr, "\nArguments:\n" 1336 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n" 1337 "\t-e\tSpecify an environment to be used by the kernel.\n" 1338 "\t-h\tThis list of options.\n" 1339 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n" 1340 "\t-I\tCreate a virtual network device.\n" 1341 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n" 1342 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n" 1343 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n" 1344 "\t \t- numcpus - number of cpus\n" 1345 "\t \t- :lbits - specify the number of bits within APICID(=CPUID) needed for representing\n" 1346 "\t \t the logical ID. Controls the number of threads/core (0bits - 1 thread, 1bit - 2 threads).\n" 1347 "\t \t- :cbits - specify the number of bits within APICID(=CPUID) needed for representing\n" 1348 "\t \t the core ID. Controls the number of core/package (0bits - 1 core, 1bit - 2 cores).\n" 1349 "\t-p\tSpecify a file in which to store the process ID.\n" 1350 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n" 1351 "\t-s\tBoot into single-user mode.\n" 1352 "\t-U\tEnable writing to kernel memory and module loading.\n" 1353 "\t-v\tTurn on verbose booting.\n"); 1354 1355 exit(EX_USAGE); 1356 } 1357 1358 void 1359 cpu_reset(void) 1360 { 1361 kprintf("cpu reset, rebooting vkernel\n"); 1362 closefrom(3); 1363 cleanpid(); 1364 execv(save_av[0], save_av); 1365 } 1366 1367 void 1368 cpu_halt(void) 1369 { 1370 kprintf("cpu halt, exiting vkernel\n"); 1371 cleanpid(); 1372 exit(EX_OK); 1373 } 1374 1375 void 1376 setrealcpu(void) 1377 { 1378 switch(lwp_cpu_lock) { 1379 case LCL_PER_CPU: 1380 if (bootverbose) 1381 kprintf("Locking CPU%d to real cpu %d\n", 1382 mycpuid, next_cpu); 1383 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1384 next_cpu++; 1385 if (next_cpu >= real_ncpus) 1386 next_cpu = 0; 1387 break; 1388 case LCL_SINGLE_CPU: 1389 if (bootverbose) 1390 kprintf("Locking CPU%d to real cpu %d\n", 1391 mycpuid, next_cpu); 1392 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1393 break; 1394 default: 1395 /* do not map virtual cpus to real cpus */ 1396 break; 1397 } 1398 } 1399 1400 /* 1401 * Allocate and free memory for module loading. The loaded module 1402 * has to be placed somewhere near the current kernel binary load 1403 * point or the relocations will not work. 1404 * 1405 * I'm not sure why this isn't working. 1406 */ 1407 int 1408 vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes) 1409 { 1410 kprintf("module loading for vkernel64's not currently supported\n"); 1411 *basep = 0; 1412 return ENOMEM; 1413 #if 0 1414 #if 1 1415 size_t xtra; 1416 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK; 1417 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra; 1418 bzero((void *)*basep, bytes); 1419 #else 1420 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes, 1421 PROT_READ|PROT_WRITE|PROT_EXEC, 1422 MAP_ANON|MAP_SHARED, -1, 0); 1423 if ((void *)*basep == MAP_FAILED) 1424 return ENOMEM; 1425 #endif 1426 kprintf("basep %p %p %zd\n", 1427 (void *)vkernel_module_memory_alloc, (void *)*basep, bytes); 1428 return 0; 1429 #endif 1430 } 1431 1432 void 1433 vkernel_module_memory_free(vm_offset_t base, size_t bytes) 1434 { 1435 #if 0 1436 #if 0 1437 munmap((void *)base, bytes); 1438 #endif 1439 #endif 1440 } 1441