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 int tsc_invariant; 112 int tsc_mpsync; 113 int64_t tsc_frequency; 114 int optcpus; /* number of cpus - see mp_start() */ 115 int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */ 116 int real_ncpus; /* number of real CPUs */ 117 int next_cpu; /* next real CPU to lock a virtual CPU to */ 118 int vkernel_b_arg; /* -b argument - no of logical CPU bits - only SMP */ 119 int vkernel_B_arg; /* -B argument - no of core bits - only SMP */ 120 121 struct privatespace *CPU_prvspace; 122 123 static struct trapframe proc0_tf; 124 static void *proc0paddr; 125 126 static void init_sys_memory(char *imageFile); 127 static void init_kern_memory(void); 128 static void init_globaldata(void); 129 static void init_vkernel(void); 130 static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type); 131 static void init_netif(char *netifExp[], int netifFileNum); 132 static void writepid(void); 133 static void cleanpid(void); 134 static int unix_connect(const char *path); 135 static void usage_err(const char *ctl, ...); 136 static void usage_help(_Bool); 137 static void init_locks(void); 138 139 static int save_ac; 140 static char **save_av; 141 142 /* 143 * Kernel startup for virtual kernels - standard main() 144 */ 145 int 146 main(int ac, char **av) 147 { 148 char *memImageFile = NULL; 149 char *netifFile[VKNETIF_MAX]; 150 char *diskFile[VKDISK_MAX]; 151 char *cdFile[VKDISK_MAX]; 152 char *suffix; 153 char *endp; 154 char *tmp; 155 char *tok; 156 int netifFileNum = 0; 157 int diskFileNum = 0; 158 int cdFileNum = 0; 159 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */ 160 int c; 161 int i; 162 int j; 163 int n; 164 int isq; 165 int pos; 166 int eflag; 167 int real_vkernel_enable; 168 int supports_sse; 169 size_t vsize; 170 size_t kenv_size; 171 size_t kenv_size2; 172 173 save_ac = ac; 174 save_av = av; 175 eflag = 0; 176 pos = 0; 177 kenv_size = 0; 178 179 /* 180 * Process options 181 */ 182 kernel_mem_readonly = 1; 183 optcpus = 2; 184 vkernel_b_arg = 0; 185 vkernel_B_arg = 0; 186 lwp_cpu_lock = LCL_NONE; 187 188 real_vkernel_enable = 0; 189 vsize = sizeof(real_vkernel_enable); 190 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0); 191 192 if (real_vkernel_enable == 0) { 193 errx(1, "vm.vkernel_enable is 0, must be set " 194 "to 1 to execute a vkernel!"); 195 } 196 197 real_ncpus = 1; 198 vsize = sizeof(real_ncpus); 199 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0); 200 201 if (ac < 2) 202 usage_help(false); 203 204 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:Ub:B:")) != -1) { 205 switch(c) { 206 case 'e': 207 /* 208 * name=value:name=value:name=value... 209 * name="value"... 210 * 211 * Allow values to be quoted but note that shells 212 * may remove the quotes, so using this feature 213 * to embed colons may require a backslash. 214 */ 215 n = strlen(optarg); 216 isq = 0; 217 218 if (eflag == 0) { 219 kenv_size = n + 2; 220 kern_envp = malloc(kenv_size); 221 if (kern_envp == NULL) 222 errx(1, "Couldn't allocate %zd bytes for kern_envp", kenv_size); 223 } else { 224 kenv_size2 = kenv_size + n + 1; 225 pos = kenv_size - 1; 226 if ((tmp = realloc(kern_envp, kenv_size2)) == NULL) 227 errx(1, "Couldn't reallocate %zd bytes for kern_envp", kenv_size2); 228 kern_envp = tmp; 229 kenv_size = kenv_size2; 230 } 231 232 for (i = 0, j = pos; i < n; ++i) { 233 if (optarg[i] == '"') 234 isq ^= 1; 235 else if (optarg[i] == '\'') 236 isq ^= 2; 237 else if (isq == 0 && optarg[i] == ':') 238 kern_envp[j++] = 0; 239 else 240 kern_envp[j++] = optarg[i]; 241 } 242 kern_envp[j++] = 0; 243 kern_envp[j++] = 0; 244 eflag++; 245 break; 246 case 's': 247 boothowto |= RB_SINGLE; 248 break; 249 case 'v': 250 bootverbose = 1; 251 break; 252 case 'i': 253 memImageFile = optarg; 254 break; 255 case 'I': 256 if (netifFileNum < VKNETIF_MAX) 257 netifFile[netifFileNum++] = strdup(optarg); 258 break; 259 case 'r': 260 if (bootOnDisk < 0) 261 bootOnDisk = 1; 262 if (diskFileNum + cdFileNum < VKDISK_MAX) 263 diskFile[diskFileNum++] = strdup(optarg); 264 break; 265 case 'c': 266 if (bootOnDisk < 0) 267 bootOnDisk = 0; 268 if (diskFileNum + cdFileNum < VKDISK_MAX) 269 cdFile[cdFileNum++] = strdup(optarg); 270 break; 271 case 'm': 272 Maxmem_bytes = strtoull(optarg, &suffix, 0); 273 if (suffix) { 274 switch(*suffix) { 275 case 'g': 276 case 'G': 277 Maxmem_bytes <<= 30; 278 break; 279 case 'm': 280 case 'M': 281 Maxmem_bytes <<= 20; 282 break; 283 case 'k': 284 case 'K': 285 Maxmem_bytes <<= 10; 286 break; 287 default: 288 Maxmem_bytes = 0; 289 usage_err("Bad maxmem option"); 290 /* NOT REACHED */ 291 break; 292 } 293 } 294 break; 295 case 'l': 296 next_cpu = -1; 297 if (strncmp("map", optarg, 3) == 0) { 298 lwp_cpu_lock = LCL_PER_CPU; 299 if (optarg[3] == ',') { 300 next_cpu = strtol(optarg+4, &endp, 0); 301 if (*endp != '\0') 302 usage_err("Bad target CPU number at '%s'", endp); 303 } else { 304 next_cpu = 0; 305 } 306 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 307 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 308 } else if (strncmp("any", optarg, 3) == 0) { 309 lwp_cpu_lock = LCL_NONE; 310 } else { 311 lwp_cpu_lock = LCL_SINGLE_CPU; 312 next_cpu = strtol(optarg, &endp, 0); 313 if (*endp != '\0') 314 usage_err("Bad target CPU number at '%s'", endp); 315 if (next_cpu < 0 || next_cpu > real_ncpus - 1) 316 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1); 317 } 318 break; 319 case 'n': 320 /* 321 * This value is set up by mp_start(), don't just 322 * set ncpus here. 323 */ 324 tok = strtok(optarg, ":"); 325 optcpus = strtol(tok, NULL, 0); 326 if (optcpus < 1 || optcpus > MAXCPU) 327 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU); 328 329 /* :lbits argument */ 330 tok = strtok(NULL, ":"); 331 if (tok != NULL) { 332 vkernel_b_arg = strtol(tok, NULL, 0); 333 334 /* :cbits argument */ 335 tok = strtok(NULL, ":"); 336 if (tok != NULL) { 337 vkernel_B_arg = strtol(tok, NULL, 0); 338 } 339 340 } 341 break; 342 case 'p': 343 pid_file = optarg; 344 break; 345 case 'U': 346 kernel_mem_readonly = 0; 347 break; 348 case 'h': 349 usage_help(true); 350 break; 351 default: 352 usage_help(false); 353 } 354 } 355 356 writepid(); 357 cpu_disable_intr(); 358 init_sys_memory(memImageFile); 359 init_kern_memory(); 360 init_globaldata(); 361 init_vkernel(); 362 setrealcpu(); 363 init_kqueue(); 364 365 vmm_guest = 1; 366 367 /* 368 * Check TSC 369 */ 370 vsize = sizeof(tsc_present); 371 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0); 372 vsize = sizeof(tsc_invariant); 373 sysctlbyname("hw.tsc_invariant", &tsc_invariant, &vsize, NULL, 0); 374 vsize = sizeof(tsc_mpsync); 375 sysctlbyname("hw.tsc_mpsync", &tsc_mpsync, &vsize, NULL, 0); 376 vsize = sizeof(tsc_frequency); 377 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0); 378 if (tsc_present) 379 cpu_feature |= CPUID_TSC; 380 381 /* 382 * Check SSE 383 */ 384 vsize = sizeof(supports_sse); 385 supports_sse = 0; 386 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0); 387 init_fpu(supports_sse); 388 if (supports_sse) 389 cpu_feature |= CPUID_SSE | CPUID_FXSR; 390 391 /* 392 * We boot from the first installed disk. 393 */ 394 if (bootOnDisk == 1) { 395 init_disk(diskFile, diskFileNum, VKD_DISK); 396 init_disk(cdFile, cdFileNum, VKD_CD); 397 } else { 398 init_disk(cdFile, cdFileNum, VKD_CD); 399 init_disk(diskFile, diskFileNum, VKD_DISK); 400 } 401 init_netif(netifFile, netifFileNum); 402 init_exceptions(); 403 mi_startup(); 404 /* NOT REACHED */ 405 exit(EX_SOFTWARE); 406 } 407 408 /* 409 * Initialize system memory. This is the virtual kernel's 'RAM'. 410 */ 411 static 412 void 413 init_sys_memory(char *imageFile) 414 { 415 struct stat st; 416 int i; 417 int fd; 418 419 /* 420 * Figure out the system memory image size. If an image file was 421 * specified and -m was not specified, use the image file's size. 422 */ 423 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0) 424 Maxmem_bytes = (vm_paddr_t)st.st_size; 425 if ((imageFile == NULL || stat(imageFile, &st) < 0) && 426 Maxmem_bytes == 0) { 427 errx(1, "Cannot create new memory file %s unless " 428 "system memory size is specified with -m", 429 imageFile); 430 /* NOT REACHED */ 431 } 432 433 /* 434 * Maxmem must be known at this time 435 */ 436 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) { 437 errx(1, "Bad maxmem specification: 64MB minimum, " 438 "multiples of %dMB only", 439 SEG_SIZE / 1024 / 1024); 440 /* NOT REACHED */ 441 } 442 443 /* 444 * Generate an image file name if necessary, then open/create the 445 * file exclusively locked. Do not allow multiple virtual kernels 446 * to use the same image file. 447 * 448 * Don't iterate through a million files if we do not have write 449 * access to the directory, stop if our open() failed on a 450 * non-existant file. Otherwise opens can fail for any number 451 */ 452 if (imageFile == NULL) { 453 for (i = 0; i < 1000000; ++i) { 454 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i); 455 fd = open(imageFile, 456 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 457 if (fd < 0 && stat(imageFile, &st) == 0) { 458 free(imageFile); 459 continue; 460 } 461 break; 462 } 463 } else { 464 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644); 465 } 466 fprintf(stderr, "Using memory file: %s\n", imageFile); 467 if (fd < 0 || fstat(fd, &st) < 0) { 468 err(1, "Unable to open/create %s", imageFile); 469 /* NOT REACHED */ 470 } 471 472 /* 473 * Truncate or extend the file as necessary. Clean out the contents 474 * of the file, we want it to be full of holes so we don't waste 475 * time reading in data from an old file that we no longer care 476 * about. 477 */ 478 ftruncate(fd, 0); 479 ftruncate(fd, Maxmem_bytes); 480 481 MemImageFd = fd; 482 Maxmem = Maxmem_bytes >> PAGE_SHIFT; 483 physmem = Maxmem; 484 } 485 486 /* 487 * Initialize kernel memory. This reserves kernel virtual memory by using 488 * MAP_VPAGETABLE 489 */ 490 491 static 492 void 493 init_kern_memory(void) 494 { 495 void *base; 496 void *try; 497 char dummy; 498 char *topofstack = &dummy; 499 int i; 500 void *firstfree; 501 502 /* 503 * Memory map our kernel virtual memory space. Note that the 504 * kernel image itself is not made part of this memory for the 505 * moment. 506 * 507 * The memory map must be segment-aligned so we can properly 508 * offset KernelPTD. 509 * 510 * If the system kernel has a different MAXDSIZ, it might not 511 * be possible to map kernel memory in its prefered location. 512 * Try a number of different locations. 513 */ 514 try = (void *)(512UL << 30); 515 base = NULL; 516 while ((char *)try + KERNEL_KVA_SIZE < topofstack) { 517 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE, 518 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE, 519 MemImageFd, (off_t)try); 520 if (base == try) 521 break; 522 if (base != MAP_FAILED) 523 munmap(base, KERNEL_KVA_SIZE); 524 try = (char *)try + (512UL << 30); 525 } 526 if (base != try) { 527 err(1, "Unable to mmap() kernel virtual memory!"); 528 /* NOT REACHED */ 529 } 530 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC); 531 KvaStart = (vm_offset_t)base; 532 KvaSize = KERNEL_KVA_SIZE; 533 KvaEnd = KvaStart + KvaSize; 534 535 /* cannot use kprintf yet */ 536 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd); 537 538 /* MAP_FILE? */ 539 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE, 540 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED, 541 MemImageFd, 0); 542 if (dmap_min_address == MAP_FAILED) { 543 err(1, "Unable to mmap() kernel DMAP region!"); 544 /* NOT REACHED */ 545 } 546 547 /* 548 * Bootstrap the kernel_pmap 549 */ 550 firstfree = NULL; 551 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base); 552 553 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP, 554 0 | VPTE_R | VPTE_W | VPTE_V); 555 556 /* 557 * phys_avail[] represents unallocated physical memory. MI code 558 * will use phys_avail[] to create the vm_page array. 559 */ 560 phys_avail[0] = (vm_paddr_t)firstfree; 561 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK; 562 phys_avail[1] = Maxmem_bytes; 563 564 #if JGV 565 /* 566 * (virtual_start, virtual_end) represent unallocated kernel virtual 567 * memory. MI code will create kernel_map using these parameters. 568 */ 569 virtual_start = KvaStart + (long)firstfree; 570 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK; 571 virtual_end = KvaStart + KERNEL_KVA_SIZE; 572 #endif 573 574 /* 575 * pmap_growkernel() will set the correct value. 576 */ 577 kernel_vm_end = 0; 578 579 /* 580 * Allocate space for process 0's UAREA. 581 */ 582 proc0paddr = (void *)virtual_start; 583 for (i = 0; i < UPAGES; ++i) { 584 pmap_kenter_quick(virtual_start, phys_avail[0]); 585 virtual_start += PAGE_SIZE; 586 phys_avail[0] += PAGE_SIZE; 587 } 588 589 /* 590 * crashdumpmap 591 */ 592 crashdumpmap = virtual_start; 593 virtual_start += MAXDUMPPGS * PAGE_SIZE; 594 595 /* 596 * msgbufp maps the system message buffer 597 */ 598 assert((MSGBUF_SIZE & PAGE_MASK) == 0); 599 msgbufp = (void *)virtual_start; 600 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) { 601 pmap_kenter_quick(virtual_start, phys_avail[0]); 602 virtual_start += PAGE_SIZE; 603 phys_avail[0] += PAGE_SIZE; 604 } 605 msgbufinit(msgbufp, MSGBUF_SIZE); 606 607 /* 608 * used by kern_memio for /dev/mem access 609 */ 610 ptvmmap = (caddr_t)virtual_start; 611 virtual_start += PAGE_SIZE; 612 } 613 614 /* 615 * Map the per-cpu globaldata for cpu #0. Allocate the space using 616 * virtual_start and phys_avail[0] 617 */ 618 static 619 void 620 init_globaldata(void) 621 { 622 int i; 623 vm_paddr_t pa; 624 vm_offset_t va; 625 626 /* 627 * Reserve enough KVA to cover possible cpus. This is a considerable 628 * amount of KVA since the privatespace structure includes two 629 * whole page table mappings. 630 */ 631 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK; 632 CPU_prvspace = (void *)virtual_start; 633 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU; 634 635 /* 636 * Allocate enough physical memory to cover the mdglobaldata 637 * portion of the space and the idle stack and map the pages 638 * into KVA. For cpu #0 only. 639 */ 640 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) { 641 pa = phys_avail[0]; 642 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i; 643 pmap_kenter_quick(va, pa); 644 phys_avail[0] += PAGE_SIZE; 645 } 646 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) { 647 pa = phys_avail[0]; 648 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i; 649 pmap_kenter_quick(va, pa); 650 phys_avail[0] += PAGE_SIZE; 651 } 652 653 /* 654 * Setup the %gs for cpu #0. The mycpu macro works after this 655 * point. Note that %fs is used by pthreads. 656 */ 657 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace)); 658 } 659 660 661 /* 662 * Initialize pool tokens and other necessary locks 663 */ 664 static void 665 init_locks(void) 666 { 667 668 /* 669 * Get the initial mplock with a count of 1 for the BSP. 670 * This uses a LOGICAL cpu ID, ie BSP == 0. 671 */ 672 cpu_get_initial_mplock(); 673 674 /* our token pool needs to work early */ 675 lwkt_token_pool_init(); 676 677 } 678 679 680 /* 681 * Initialize very low level systems including thread0, proc0, etc. 682 */ 683 static 684 void 685 init_vkernel(void) 686 { 687 struct mdglobaldata *gd; 688 689 gd = &CPU_prvspace[0].mdglobaldata; 690 bzero(gd, sizeof(*gd)); 691 692 gd->mi.gd_curthread = &thread0; 693 thread0.td_gd = &gd->mi; 694 ncpus = 1; 695 ncpus2 = 1; /* rounded down power of 2 */ 696 ncpus_fit = 1; /* rounded up power of 2 */ 697 /* ncpus2_mask and ncpus_fit_mask are 0 */ 698 init_param1(); 699 gd->mi.gd_prvspace = &CPU_prvspace[0]; 700 mi_gdinit(&gd->mi, 0); 701 cpu_gdinit(gd, 0); 702 mi_proc0init(&gd->mi, proc0paddr); 703 lwp0.lwp_md.md_regs = &proc0_tf; 704 705 init_locks(); 706 cninit(); 707 rand_initialize(); 708 #if 0 /* #ifdef DDB */ 709 kdb_init(); 710 if (boothowto & RB_KDB) 711 Debugger("Boot flags requested debugger"); 712 #endif 713 identcpu(); 714 #if 0 715 initializecpu(); /* Initialize CPU registers */ 716 #endif 717 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE); 718 719 #if 0 720 /* 721 * Map the message buffer 722 */ 723 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) 724 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off); 725 msgbufinit(msgbufp, MSGBUF_SIZE); 726 #endif 727 #if 0 728 thread0.td_pcb_cr3 ... MMU 729 lwp0.lwp_md.md_regs = &proc0_tf; 730 #endif 731 } 732 733 /* 734 * Filesystem image paths for the virtual kernel are optional. 735 * If specified they each should point to a disk image, 736 * the first of which will become the root disk. 737 * 738 * The virtual kernel caches data from our 'disk' just like a normal kernel, 739 * so we do not really want the real kernel to cache the data too. Use 740 * O_DIRECT to remove the duplication. 741 */ 742 static 743 void 744 init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type) 745 { 746 char *serno; 747 int i; 748 749 if (diskFileNum == 0) 750 return; 751 752 for(i=0; i < diskFileNum; i++){ 753 char *fname; 754 fname = diskExp[i]; 755 756 if (fname == NULL) { 757 warnx("Invalid argument to '-r'"); 758 continue; 759 } 760 /* 761 * Check for a serial number for the virtual disk 762 * passed from the command line. 763 */ 764 serno = fname; 765 strsep(&serno, ":"); 766 767 if (DiskNum < VKDISK_MAX) { 768 struct stat st; 769 struct vkdisk_info* info = NULL; 770 int fd; 771 size_t l = 0; 772 773 if (type == VKD_DISK) 774 fd = open(fname, O_RDWR|O_DIRECT, 0644); 775 else 776 fd = open(fname, O_RDONLY|O_DIRECT, 0644); 777 if (fd < 0 || fstat(fd, &st) < 0) { 778 err(1, "Unable to open/create %s", fname); 779 /* NOT REACHED */ 780 } 781 if (S_ISREG(st.st_mode)) { 782 if (flock(fd, LOCK_EX|LOCK_NB) < 0) { 783 errx(1, "Disk image %s is already " 784 "in use\n", fname); 785 /* NOT REACHED */ 786 } 787 } 788 789 info = &DiskInfo[DiskNum]; 790 l = strlen(fname); 791 792 info->unit = i; 793 info->fd = fd; 794 info->type = type; 795 memcpy(info->fname, fname, l); 796 info->serno = NULL; 797 if (serno) { 798 if ((info->serno = malloc(SERNOLEN)) != NULL) 799 strlcpy(info->serno, serno, SERNOLEN); 800 else 801 warnx("Couldn't allocate memory for the operation"); 802 } 803 804 if (DiskNum == 0) { 805 if (type == VKD_CD) { 806 rootdevnames[0] = "cd9660:vcd0a"; 807 } else if (type == VKD_DISK) { 808 rootdevnames[0] = "ufs:vkd0s0a"; 809 rootdevnames[1] = "ufs:vkd0s1a"; 810 } 811 } 812 813 DiskNum++; 814 } else { 815 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname); 816 continue; 817 } 818 } 819 } 820 821 static 822 int 823 netif_set_tapflags(int tap_unit, int f, int s) 824 { 825 struct ifreq ifr; 826 int flags; 827 828 bzero(&ifr, sizeof(ifr)); 829 830 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 831 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { 832 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit); 833 return -1; 834 } 835 836 /* 837 * Adjust if_flags 838 * 839 * If the flags are already set/cleared, then we return 840 * immediately to avoid extra syscalls 841 */ 842 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); 843 if (f < 0) { 844 /* Turn off flags */ 845 f = -f; 846 if ((flags & f) == 0) 847 return 0; 848 flags &= ~f; 849 } else { 850 /* Turn on flags */ 851 if (flags & f) 852 return 0; 853 flags |= f; 854 } 855 856 /* 857 * Fix up ifreq.ifr_name, since it may be trashed 858 * in previous ioctl(SIOCGIFFLAGS) 859 */ 860 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit); 861 862 ifr.ifr_flags = flags & 0xffff; 863 ifr.ifr_flagshigh = flags >> 16; 864 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) { 865 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit); 866 return -1; 867 } 868 return 0; 869 } 870 871 static 872 int 873 netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s) 874 { 875 struct ifaliasreq ifra; 876 struct sockaddr_in *in; 877 878 bzero(&ifra, sizeof(ifra)); 879 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit); 880 881 /* Setup address */ 882 in = (struct sockaddr_in *)&ifra.ifra_addr; 883 in->sin_family = AF_INET; 884 in->sin_len = sizeof(*in); 885 in->sin_addr.s_addr = addr; 886 887 if (mask != 0) { 888 /* Setup netmask */ 889 in = (struct sockaddr_in *)&ifra.ifra_mask; 890 in->sin_len = sizeof(*in); 891 in->sin_addr.s_addr = mask; 892 } 893 894 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) { 895 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit); 896 return -1; 897 } 898 return 0; 899 } 900 901 static 902 int 903 netif_add_tap2brg(int tap_unit, const char *ifbridge, int s) 904 { 905 struct ifbreq ifbr; 906 struct ifdrv ifd; 907 908 bzero(&ifbr, sizeof(ifbr)); 909 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname), 910 "tap%d", tap_unit); 911 912 bzero(&ifd, sizeof(ifd)); 913 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name)); 914 ifd.ifd_cmd = BRDGADD; 915 ifd.ifd_len = sizeof(ifbr); 916 ifd.ifd_data = &ifbr; 917 918 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) { 919 /* 920 * 'errno == EEXIST' means that the tap(4) is already 921 * a member of the bridge(4) 922 */ 923 if (errno != EEXIST) { 924 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge); 925 return -1; 926 } 927 } 928 return 0; 929 } 930 931 #define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK) 932 933 /* 934 * Locate the first unused tap(4) device file if auto mode is requested, 935 * or open the user supplied device file, and bring up the corresponding 936 * tap(4) interface. 937 * 938 * NOTE: Only tap(4) device file is supported currently 939 */ 940 static 941 int 942 netif_open_tap(const char *netif, int *tap_unit, int s) 943 { 944 char tap_dev[MAXPATHLEN]; 945 int tap_fd, failed; 946 struct stat st; 947 char *dname; 948 949 *tap_unit = -1; 950 951 if (strcmp(netif, "auto") == 0) { 952 /* 953 * Find first unused tap(4) device file 954 */ 955 tap_fd = open("/dev/tap", TAPDEV_OFLAGS); 956 if (tap_fd < 0) { 957 warnc(errno, "Unable to find a free tap(4)"); 958 return -1; 959 } 960 } else { 961 /* 962 * User supplied tap(4) device file or unix socket. 963 */ 964 if (netif[0] == '/') /* Absolute path */ 965 strlcpy(tap_dev, netif, sizeof(tap_dev)); 966 else 967 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif); 968 969 tap_fd = open(tap_dev, TAPDEV_OFLAGS); 970 971 /* 972 * If we cannot open normally try to connect to it. 973 */ 974 if (tap_fd < 0) 975 tap_fd = unix_connect(tap_dev); 976 977 if (tap_fd < 0) { 978 warn("Unable to open %s", tap_dev); 979 return -1; 980 } 981 } 982 983 /* 984 * Check whether the device file is a tap(4) 985 */ 986 if (fstat(tap_fd, &st) < 0) { 987 failed = 1; 988 } else if (S_ISCHR(st.st_mode)) { 989 dname = fdevname(tap_fd); 990 if (dname) 991 dname = strstr(dname, "tap"); 992 if (dname) { 993 /* 994 * Bring up the corresponding tap(4) interface 995 */ 996 *tap_unit = strtol(dname + 3, NULL, 10); 997 printf("TAP UNIT %d\n", *tap_unit); 998 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0) 999 failed = 0; 1000 else 1001 failed = 1; 1002 } else { 1003 failed = 1; 1004 } 1005 } else if (S_ISSOCK(st.st_mode)) { 1006 /* 1007 * Special socket connection (typically to vknet). We 1008 * do not have to do anything. 1009 */ 1010 failed = 0; 1011 } else { 1012 failed = 1; 1013 } 1014 1015 if (failed) { 1016 warnx("%s is not a tap(4) device or socket", tap_dev); 1017 close(tap_fd); 1018 tap_fd = -1; 1019 *tap_unit = -1; 1020 } 1021 return tap_fd; 1022 } 1023 1024 static int 1025 unix_connect(const char *path) 1026 { 1027 struct sockaddr_un sunx; 1028 int len; 1029 int net_fd; 1030 int sndbuf = 262144; 1031 struct stat st; 1032 1033 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path); 1034 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]); 1035 ++len; /* include nul */ 1036 sunx.sun_family = AF_UNIX; 1037 sunx.sun_len = len; 1038 1039 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0); 1040 if (net_fd < 0) 1041 return(-1); 1042 if (connect(net_fd, (void *)&sunx, len) < 0) { 1043 close(net_fd); 1044 return(-1); 1045 } 1046 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)); 1047 if (fstat(net_fd, &st) == 0) 1048 printf("Network socket buffer: %d bytes\n", st.st_blksize); 1049 fcntl(net_fd, F_SETFL, O_NONBLOCK); 1050 return(net_fd); 1051 } 1052 1053 #undef TAPDEV_MAJOR 1054 #undef TAPDEV_MINOR 1055 #undef TAPDEV_OFLAGS 1056 1057 /* 1058 * Following syntax is supported, 1059 * 1) x.x.x.x tap(4)'s address is x.x.x.x 1060 * 1061 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x 1062 * tap(4)'s netmask len is z 1063 * 1064 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x 1065 * pseudo netif's address is y.y.y.y 1066 * 1067 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x 1068 * pseudo netif's address is y.y.y.y 1069 * tap(4) and pseudo netif's netmask len are z 1070 * 1071 * 5) bridgeX tap(4) will be added to bridgeX 1072 * 1073 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX 1074 * pseudo netif's address is y.y.y.y 1075 * 1076 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX 1077 * pseudo netif's address is y.y.y.y 1078 * pseudo netif's netmask len is z 1079 */ 1080 static 1081 int 1082 netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s) 1083 { 1084 in_addr_t tap_addr, netmask, netif_addr; 1085 int next_netif_addr; 1086 char *tok, *masklen_str, *ifbridge; 1087 1088 *addr = 0; 1089 *mask = 0; 1090 1091 tok = strtok(NULL, ":/"); 1092 if (tok == NULL) { 1093 /* 1094 * Nothing special, simply use tap(4) as backend 1095 */ 1096 return 0; 1097 } 1098 1099 if (inet_pton(AF_INET, tok, &tap_addr) > 0) { 1100 /* 1101 * tap(4)'s address is supplied 1102 */ 1103 ifbridge = NULL; 1104 1105 /* 1106 * If there is next token, then it may be pseudo 1107 * netif's address or netmask len for tap(4) 1108 */ 1109 next_netif_addr = 0; 1110 } else { 1111 /* 1112 * Not tap(4)'s address, assume it as a bridge(4) 1113 * iface name 1114 */ 1115 tap_addr = 0; 1116 ifbridge = tok; 1117 1118 /* 1119 * If there is next token, then it must be pseudo 1120 * netif's address 1121 */ 1122 next_netif_addr = 1; 1123 } 1124 1125 netmask = netif_addr = 0; 1126 1127 tok = strtok(NULL, ":/"); 1128 if (tok == NULL) 1129 goto back; 1130 1131 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) { 1132 if (next_netif_addr) { 1133 warnx("Invalid pseudo netif address: %s", tok); 1134 return -1; 1135 } 1136 netif_addr = 0; 1137 1138 /* 1139 * Current token is not address, then it must be netmask len 1140 */ 1141 masklen_str = tok; 1142 } else { 1143 /* 1144 * Current token is pseudo netif address, if there is next token 1145 * it must be netmask len 1146 */ 1147 masklen_str = strtok(NULL, "/"); 1148 } 1149 1150 /* Calculate netmask */ 1151 if (masklen_str != NULL) { 1152 u_long masklen; 1153 1154 masklen = strtoul(masklen_str, NULL, 10); 1155 if (masklen < 32 && masklen > 0) { 1156 netmask = htonl(~((1LL << (32 - masklen)) - 1) 1157 & 0xffffffff); 1158 } else { 1159 warnx("Invalid netmask len: %lu", masklen); 1160 return -1; 1161 } 1162 } 1163 1164 /* Make sure there is no more token left */ 1165 if (strtok(NULL, ":/") != NULL) { 1166 warnx("Invalid argument to '-I'"); 1167 return -1; 1168 } 1169 1170 back: 1171 if (tap_unit < 0) { 1172 /* Do nothing */ 1173 } else if (ifbridge == NULL) { 1174 /* Set tap(4) address/netmask */ 1175 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0) 1176 return -1; 1177 } else { 1178 /* Tie tap(4) to bridge(4) */ 1179 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0) 1180 return -1; 1181 } 1182 1183 *addr = netif_addr; 1184 *mask = netmask; 1185 return 0; 1186 } 1187 1188 /* 1189 * NetifInfo[] will be filled for pseudo netif initialization. 1190 * NetifNum will be bumped to reflect the number of valid entries 1191 * in NetifInfo[]. 1192 */ 1193 static 1194 void 1195 init_netif(char *netifExp[], int netifExpNum) 1196 { 1197 int i, s; 1198 char *tmp; 1199 1200 if (netifExpNum == 0) 1201 return; 1202 1203 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */ 1204 if (s < 0) 1205 return; 1206 1207 for (i = 0; i < netifExpNum; ++i) { 1208 struct vknetif_info *info; 1209 in_addr_t netif_addr, netif_mask; 1210 int tap_fd, tap_unit; 1211 char *netif; 1212 1213 /* Extract MAC address if there is one */ 1214 tmp = netifExp[i]; 1215 strsep(&tmp, "="); 1216 1217 netif = strtok(netifExp[i], ":"); 1218 if (netif == NULL) { 1219 warnx("Invalid argument to '-I'"); 1220 continue; 1221 } 1222 1223 /* 1224 * Open tap(4) device file and bring up the 1225 * corresponding interface 1226 */ 1227 tap_fd = netif_open_tap(netif, &tap_unit, s); 1228 if (tap_fd < 0) 1229 continue; 1230 1231 /* 1232 * Initialize tap(4) and get address/netmask 1233 * for pseudo netif 1234 * 1235 * NB: Rest part of netifExp[i] is passed 1236 * to netif_init_tap() implicitly. 1237 */ 1238 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) { 1239 /* 1240 * NB: Closing tap(4) device file will bring 1241 * down the corresponding interface 1242 */ 1243 close(tap_fd); 1244 continue; 1245 } 1246 1247 info = &NetifInfo[NetifNum]; 1248 bzero(info, sizeof(*info)); 1249 info->tap_fd = tap_fd; 1250 info->tap_unit = tap_unit; 1251 info->netif_addr = netif_addr; 1252 info->netif_mask = netif_mask; 1253 /* 1254 * If tmp isn't NULL it means a MAC could have been 1255 * specified so attempt to convert it. 1256 * Setting enaddr to NULL will tell vke_attach() we 1257 * need a pseudo-random MAC address. 1258 */ 1259 if (tmp != NULL) { 1260 if ((info->enaddr = malloc(ETHER_ADDR_LEN)) == NULL) 1261 warnx("Couldn't allocate memory for the operation"); 1262 else { 1263 if ((kether_aton(tmp, info->enaddr)) == NULL) { 1264 free(info->enaddr); 1265 info->enaddr = NULL; 1266 } 1267 } 1268 } 1269 1270 NetifNum++; 1271 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */ 1272 break; 1273 } 1274 close(s); 1275 } 1276 1277 /* 1278 * Create the pid file and leave it open and locked while the vkernel is 1279 * running. This allows a script to use /usr/bin/lockf to probe whether 1280 * a vkernel is still running (so as not to accidently kill an unrelated 1281 * process from a stale pid file). 1282 */ 1283 static 1284 void 1285 writepid(void) 1286 { 1287 char buf[32]; 1288 int fd; 1289 1290 if (pid_file != NULL) { 1291 snprintf(buf, sizeof(buf), "%ld\n", (long)getpid()); 1292 fd = open(pid_file, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0666); 1293 if (fd < 0) { 1294 if (errno == EWOULDBLOCK) { 1295 perror("Failed to lock pidfile, " 1296 "vkernel already running"); 1297 } else { 1298 perror("Failed to create pidfile"); 1299 } 1300 exit(EX_SOFTWARE); 1301 } 1302 ftruncate(fd, 0); 1303 write(fd, buf, strlen(buf)); 1304 /* leave the file open to maintain the lock */ 1305 } 1306 } 1307 1308 static 1309 void 1310 cleanpid( void ) 1311 { 1312 if (pid_file != NULL) { 1313 if (unlink(pid_file) < 0) 1314 perror("Warning: couldn't remove pidfile"); 1315 } 1316 } 1317 1318 static 1319 void 1320 usage_err(const char *ctl, ...) 1321 { 1322 va_list va; 1323 1324 va_start(va, ctl); 1325 vfprintf(stderr, ctl, va); 1326 va_end(va); 1327 fprintf(stderr, "\n"); 1328 exit(EX_USAGE); 1329 } 1330 1331 static 1332 void 1333 usage_help(_Bool help) 1334 { 1335 fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n" 1336 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n" 1337 "\t[-m size] [-n numcpus[:lbits[:cbits]]]\n" 1338 "\t[-p file] [-r file]\n", save_av[0]); 1339 1340 if (help) 1341 fprintf(stderr, "\nArguments:\n" 1342 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n" 1343 "\t-e\tSpecify an environment to be used by the kernel.\n" 1344 "\t-h\tThis list of options.\n" 1345 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n" 1346 "\t-I\tCreate a virtual network device.\n" 1347 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n" 1348 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n" 1349 "\t-n\tSpecify the number of CPUs and the topology you wish to emulate:\n" 1350 "\t \t- numcpus - number of cpus\n" 1351 "\t \t- :lbits - specify the number of bits within APICID(=CPUID) needed for representing\n" 1352 "\t \t the logical ID. Controls the number of threads/core (0bits - 1 thread, 1bit - 2 threads).\n" 1353 "\t \t- :cbits - specify the number of bits within APICID(=CPUID) needed for representing\n" 1354 "\t \t the core ID. Controls the number of core/package (0bits - 1 core, 1bit - 2 cores).\n" 1355 "\t-p\tSpecify a file in which to store the process ID.\n" 1356 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n" 1357 "\t-s\tBoot into single-user mode.\n" 1358 "\t-U\tEnable writing to kernel memory and module loading.\n" 1359 "\t-v\tTurn on verbose booting.\n"); 1360 1361 exit(EX_USAGE); 1362 } 1363 1364 void 1365 cpu_reset(void) 1366 { 1367 kprintf("cpu reset, rebooting vkernel\n"); 1368 closefrom(3); 1369 cleanpid(); 1370 execv(save_av[0], save_av); 1371 } 1372 1373 void 1374 cpu_halt(void) 1375 { 1376 kprintf("cpu halt, exiting vkernel\n"); 1377 cleanpid(); 1378 exit(EX_OK); 1379 } 1380 1381 void 1382 setrealcpu(void) 1383 { 1384 switch(lwp_cpu_lock) { 1385 case LCL_PER_CPU: 1386 if (bootverbose) 1387 kprintf("Locking CPU%d to real cpu %d\n", 1388 mycpuid, next_cpu); 1389 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1390 next_cpu++; 1391 if (next_cpu >= real_ncpus) 1392 next_cpu = 0; 1393 break; 1394 case LCL_SINGLE_CPU: 1395 if (bootverbose) 1396 kprintf("Locking CPU%d to real cpu %d\n", 1397 mycpuid, next_cpu); 1398 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu)); 1399 break; 1400 default: 1401 /* do not map virtual cpus to real cpus */ 1402 break; 1403 } 1404 } 1405 1406 /* 1407 * Allocate and free memory for module loading. The loaded module 1408 * has to be placed somewhere near the current kernel binary load 1409 * point or the relocations will not work. 1410 * 1411 * I'm not sure why this isn't working. 1412 */ 1413 int 1414 vkernel_module_memory_alloc(vm_offset_t *basep, size_t bytes) 1415 { 1416 kprintf("module loading for vkernel64's not currently supported\n"); 1417 *basep = 0; 1418 return ENOMEM; 1419 #if 0 1420 #if 1 1421 size_t xtra; 1422 xtra = (PAGE_SIZE - (vm_offset_t)sbrk(0)) & PAGE_MASK; 1423 *basep = (vm_offset_t)sbrk(xtra + bytes) + xtra; 1424 bzero((void *)*basep, bytes); 1425 #else 1426 *basep = (vm_offset_t)mmap((void *)0x000000000, bytes, 1427 PROT_READ|PROT_WRITE|PROT_EXEC, 1428 MAP_ANON|MAP_SHARED, -1, 0); 1429 if ((void *)*basep == MAP_FAILED) 1430 return ENOMEM; 1431 #endif 1432 kprintf("basep %p %p %zd\n", 1433 (void *)vkernel_module_memory_alloc, (void *)*basep, bytes); 1434 return 0; 1435 #endif 1436 } 1437 1438 void 1439 vkernel_module_memory_free(vm_offset_t base, size_t bytes) 1440 { 1441 #if 0 1442 #if 0 1443 munmap((void *)base, bytes); 1444 #endif 1445 #endif 1446 } 1447