1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * %sccs.include.redist.c% 11 * 12 * from: Utah $Hdr: machdep.c 1.63 91/04/24$ 13 * 14 * @(#)machdep.c 7.27 (Berkeley) 05/04/92 15 */ 16 17 #include "param.h" 18 #include "systm.h" 19 #include "signalvar.h" 20 #include "kernel.h" 21 #include "map.h" 22 #include "proc.h" 23 #include "buf.h" 24 #include "reboot.h" 25 #include "conf.h" 26 #include "file.h" 27 #include "clist.h" 28 #include "callout.h" 29 #include "malloc.h" 30 #include "mbuf.h" 31 #include "msgbuf.h" 32 #include "mount.h" 33 #include "user.h" 34 #include "exec.h" 35 #ifdef SYSVSHM 36 #include "shm.h" 37 #endif 38 #ifdef HPUXCOMPAT 39 #include "../hpux/hpux.h" 40 #endif 41 42 #include "../include/cpu.h" 43 #include "../include/reg.h" 44 #include "../include/psl.h" 45 #include "isr.h" 46 #include "pte.h" 47 #include "net/netisr.h" 48 49 #define MAXMEM 64*1024*CLSIZE /* XXX - from cmap.h */ 50 #include "vm/vm_kern.h" 51 52 vm_map_t buffer_map; 53 extern vm_offset_t avail_end; 54 55 /* 56 * Declare these as initialized data so we can patch them. 57 */ 58 int nswbuf = 0; 59 #ifdef NBUF 60 int nbuf = NBUF; 61 #else 62 int nbuf = 0; 63 #endif 64 #ifdef BUFPAGES 65 int bufpages = BUFPAGES; 66 #else 67 int bufpages = 0; 68 #endif 69 int msgbufmapped; /* set when safe to use msgbuf */ 70 int maxmem; /* max memory per process */ 71 int physmem = MAXMEM; /* max supported memory, changes to actual */ 72 /* 73 * safepri is a safe priority for sleep to set for a spin-wait 74 * during autoconfiguration or after a panic. 75 */ 76 int safepri = PSL_LOWIPL; 77 78 extern u_int lowram; 79 80 /* 81 * Console initialization: called early on from main, 82 * before vm init or startup. Do enough configuration 83 * to choose and initialize a console. 84 */ 85 consinit() 86 { 87 88 /* 89 * Set cpuspeed immediately since cninit() called routines 90 * might use delay. 91 */ 92 switch (machineid) { 93 case HP_320: 94 case HP_330: 95 case HP_340: 96 cpuspeed = MHZ_16; 97 break; 98 case HP_350: 99 case HP_360: 100 cpuspeed = MHZ_25; 101 break; 102 case HP_370: 103 cpuspeed = MHZ_33; 104 break; 105 case HP_375: 106 cpuspeed = MHZ_50; 107 break; 108 } 109 /* 110 * Find what hardware is attached to this machine. 111 */ 112 find_devs(); 113 114 /* 115 * Initialize the console before we print anything out. 116 */ 117 cninit(); 118 } 119 120 /* 121 * cpu_startup: allocate memory for variable-sized tables, 122 * initialize cpu, and do autoconfiguration. 123 */ 124 cpu_startup() 125 { 126 register unsigned i; 127 register caddr_t v, firstaddr; 128 int base, residual; 129 extern long Usrptsize; 130 extern struct map *useriomap; 131 #ifdef DEBUG 132 extern int pmapdebug; 133 int opmapdebug = pmapdebug; 134 #endif 135 vm_offset_t minaddr, maxaddr; 136 vm_size_t size; 137 138 /* 139 * Initialize error message buffer (at end of core). 140 */ 141 #ifdef DEBUG 142 pmapdebug = 0; 143 #endif 144 /* avail_end was pre-decremented in pmap_bootstrap to compensate */ 145 for (i = 0; i < btoc(sizeof (struct msgbuf)); i++) 146 pmap_enter(kernel_pmap, (vm_offset_t)msgbufp, 147 avail_end + i * NBPG, VM_PROT_ALL, TRUE); 148 msgbufmapped = 1; 149 150 /* 151 * Good {morning,afternoon,evening,night}. 152 */ 153 printf(version); 154 identifycpu(); 155 printf("real mem = %d\n", ctob(physmem)); 156 157 /* 158 * Allocate space for system data structures. 159 * The first available real memory address is in "firstaddr". 160 * The first available kernel virtual address is in "v". 161 * As pages of kernel virtual memory are allocated, "v" is incremented. 162 * As pages of memory are allocated and cleared, 163 * "firstaddr" is incremented. 164 * An index into the kernel page table corresponding to the 165 * virtual memory address maintained in "v" is kept in "mapaddr". 166 */ 167 /* 168 * Make two passes. The first pass calculates how much memory is 169 * needed and allocates it. The second pass assigns virtual 170 * addresses to the various data structures. 171 */ 172 firstaddr = 0; 173 again: 174 v = (caddr_t)firstaddr; 175 176 #define valloc(name, type, num) \ 177 (name) = (type *)v; v = (caddr_t)((name)+(num)) 178 #define valloclim(name, type, num, lim) \ 179 (name) = (type *)v; v = (caddr_t)((lim) = ((name)+(num))) 180 valloc(cfree, struct cblock, nclist); 181 valloc(callout, struct callout, ncallout); 182 valloc(swapmap, struct map, nswapmap = maxproc * 2); 183 #ifdef SYSVSHM 184 valloc(shmsegs, struct shmid_ds, shminfo.shmmni); 185 #endif 186 187 /* 188 * Determine how many buffers to allocate. 189 * Since HPs tend to be long on memory and short on disk speed, 190 * we allocate more buffer space than the BSD standard of 191 * use 10% of memory for the first 2 Meg, 5% of remaining. 192 * We just allocate a flat 10%. Insure a minimum of 16 buffers. 193 * We allocate 1/2 as many swap buffer headers as file i/o buffers. 194 */ 195 if (bufpages == 0) 196 bufpages = physmem / 10 / CLSIZE; 197 if (nbuf == 0) { 198 nbuf = bufpages; 199 if (nbuf < 16) 200 nbuf = 16; 201 } 202 if (nswbuf == 0) { 203 nswbuf = (nbuf / 2) &~ 1; /* force even */ 204 if (nswbuf > 256) 205 nswbuf = 256; /* sanity */ 206 } 207 valloc(swbuf, struct buf, nswbuf); 208 valloc(buf, struct buf, nbuf); 209 /* 210 * End of first pass, size has been calculated so allocate memory 211 */ 212 if (firstaddr == 0) { 213 size = (vm_size_t)(v - firstaddr); 214 firstaddr = (caddr_t) kmem_alloc(kernel_map, round_page(size)); 215 if (firstaddr == 0) 216 panic("startup: no room for tables"); 217 goto again; 218 } 219 /* 220 * End of second pass, addresses have been assigned 221 */ 222 if ((vm_size_t)(v - firstaddr) != size) 223 panic("startup: table size inconsistency"); 224 /* 225 * Now allocate buffers proper. They are different than the above 226 * in that they usually occupy more virtual memory than physical. 227 */ 228 size = MAXBSIZE * nbuf; 229 buffer_map = kmem_suballoc(kernel_map, (vm_offset_t *)&buffers, 230 &maxaddr, size, FALSE); 231 minaddr = (vm_offset_t)buffers; 232 if (vm_map_find(buffer_map, vm_object_allocate(size), (vm_offset_t)0, 233 &minaddr, size, FALSE) != KERN_SUCCESS) 234 panic("startup: cannot allocate buffers"); 235 base = bufpages / nbuf; 236 residual = bufpages % nbuf; 237 for (i = 0; i < nbuf; i++) { 238 vm_size_t curbufsize; 239 vm_offset_t curbuf; 240 241 /* 242 * First <residual> buffers get (base+1) physical pages 243 * allocated for them. The rest get (base) physical pages. 244 * 245 * The rest of each buffer occupies virtual space, 246 * but has no physical memory allocated for it. 247 */ 248 curbuf = (vm_offset_t)buffers + i * MAXBSIZE; 249 curbufsize = CLBYTES * (i < residual ? base+1 : base); 250 vm_map_pageable(buffer_map, curbuf, curbuf+curbufsize, FALSE); 251 vm_map_simplify(buffer_map, curbuf); 252 } 253 /* 254 * Allocate a submap for exec arguments. This map effectively 255 * limits the number of processes exec'ing at any time. 256 */ 257 exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 258 16*NCARGS, TRUE); 259 /* 260 * Allocate a submap for physio 261 */ 262 phys_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 263 VM_PHYS_SIZE, TRUE); 264 265 /* 266 * Finally, allocate mbuf pool. Since mclrefcnt is an off-size 267 * we use the more space efficient malloc in place of kmem_alloc. 268 */ 269 mclrefcnt = (char *)malloc(NMBCLUSTERS+CLBYTES/MCLBYTES, 270 M_MBUF, M_NOWAIT); 271 bzero(mclrefcnt, NMBCLUSTERS+CLBYTES/MCLBYTES); 272 mb_map = kmem_suballoc(kernel_map, (vm_offset_t *)&mbutl, &maxaddr, 273 VM_MBUF_SIZE, FALSE); 274 /* 275 * Initialize callouts 276 */ 277 callfree = callout; 278 for (i = 1; i < ncallout; i++) 279 callout[i-1].c_next = &callout[i]; 280 callout[i-1].c_next = NULL; 281 282 #ifdef DEBUG 283 pmapdebug = opmapdebug; 284 #endif 285 printf("avail mem = %d\n", ptoa(cnt.v_free_count)); 286 printf("using %d buffers containing %d bytes of memory\n", 287 nbuf, bufpages * CLBYTES); 288 /* 289 * Set up CPU-specific registers, cache, etc. 290 */ 291 initcpu(); 292 293 /* 294 * Set up buffers, so they can be used to read disk labels. 295 */ 296 bufinit(); 297 298 /* 299 * Configure the system. 300 */ 301 configure(); 302 } 303 304 /* 305 * Set registers on exec. 306 * XXX Should clear registers except sp, pc, 307 * but would break init; should be fixed soon. 308 */ 309 setregs(p, entry, retval) 310 register struct proc *p; 311 u_long entry; 312 int retval[2]; 313 { 314 p->p_md.md_regs[PC] = entry & ~1; 315 #ifdef FPCOPROC 316 /* restore a null state frame */ 317 p->p_addr->u_pcb.pcb_fpregs.fpf_null = 0; 318 m68881_restore(&p->p_addr->u_pcb.pcb_fpregs); 319 #endif 320 #ifdef HPUXCOMPAT 321 if (p->p_flag & SHPUX) { 322 323 p->p_md.md_regs[A0] = 0; /* not 68010 (bit 31), no FPA (30) */ 324 retval[0] = 0; /* no float card */ 325 #ifdef FPCOPROC 326 retval[1] = 1; /* yes 68881 */ 327 #else 328 retval[1] = 0; /* no 68881 */ 329 #endif 330 } 331 /* 332 * Ensure we perform the right action on traps type 1 and 2: 333 * If our parent is an HPUX process and we are being traced, turn 334 * on HPUX style interpretation. Else if we were using the HPUX 335 * style interpretation, revert to the BSD interpretation. 336 * 337 * XXX This doesn't have much to do with setting registers but 338 * I didn't want to muck up kern_exec.c with this code, so I 339 * stuck it here. 340 */ 341 if ((p->p_pptr->p_flag & SHPUX) && 342 (p->p_flag & STRC)) { 343 tweaksigcode(1); 344 p->p_addr->u_pcb.pcb_flags |= PCB_HPUXTRACE; 345 } else if (p->p_addr->u_pcb.pcb_flags & PCB_HPUXTRACE) { 346 tweaksigcode(0); 347 p->p_addr->u_pcb.pcb_flags &= ~PCB_HPUXTRACE; 348 } 349 #endif 350 } 351 352 identifycpu() 353 { 354 355 printf("HP9000/"); 356 switch (machineid) { 357 case HP_320: 358 printf("320 (16.67Mhz"); 359 break; 360 case HP_330: 361 printf("318/319/330 (16.67Mhz"); 362 break; 363 case HP_340: 364 printf("340 (16.67Mhz"); 365 break; 366 case HP_350: 367 printf("350 (25Mhz"); 368 break; 369 case HP_360: 370 printf("360 (25Mhz"); 371 break; 372 case HP_370: 373 printf("370 (33.33Mhz"); 374 break; 375 case HP_375: 376 printf("345/375 (50Mhz"); 377 break; 378 default: 379 printf("\nunknown machine type %d\n", machineid); 380 panic("startup"); 381 } 382 printf(" MC680%s CPU", mmutype == MMU_68030 ? "30" : "20"); 383 switch (mmutype) { 384 case MMU_68030: 385 printf("+MMU"); 386 break; 387 case MMU_68851: 388 printf(", MC68851 MMU"); 389 break; 390 case MMU_HP: 391 printf(", HP MMU"); 392 break; 393 default: 394 printf("\nunknown MMU type %d\n", mmutype); 395 panic("startup"); 396 } 397 if (mmutype == MMU_68030) 398 printf(", %sMhz MC68882 FPU", 399 machineid == HP_340 ? "16.67" : 400 (machineid == HP_360 ? "25" : 401 (machineid == HP_370 ? "33.33" : "50"))); 402 else 403 printf(", %sMhz MC68881 FPU", 404 machineid == HP_350 ? "20" : "16.67"); 405 switch (ectype) { 406 case EC_VIRT: 407 printf(", %dK virtual-address cache", 408 machineid == HP_320 ? 16 : 32); 409 break; 410 case EC_PHYS: 411 printf(", %dK physical-address cache", 412 machineid == HP_370 ? 64 : 32); 413 break; 414 } 415 printf(")\n"); 416 /* 417 * Now that we have told the user what they have, 418 * let them know if that machine type isn't configured. 419 */ 420 switch (machineid) { 421 case -1: /* keep compilers happy */ 422 #if !defined(HP320) && !defined(HP350) 423 case HP_320: 424 case HP_350: 425 #endif 426 #ifndef HP330 427 case HP_330: 428 #endif 429 #if !defined(HP360) && !defined(HP370) 430 case HP_340: 431 case HP_360: 432 case HP_370: 433 #endif 434 panic("CPU type not configured"); 435 default: 436 break; 437 } 438 } 439 440 #ifdef HPUXCOMPAT 441 tweaksigcode(ishpux) 442 { 443 static short *sigtrap = NULL; 444 extern short sigcode[], esigcode[]; 445 446 /* locate trap instruction in pcb_sigc */ 447 if (sigtrap == NULL) { 448 sigtrap = esigcode; 449 while (--sigtrap >= sigcode) 450 if ((*sigtrap & 0xFFF0) == 0x4E40) 451 break; 452 if (sigtrap < sigcode) 453 panic("bogus sigcode\n"); 454 } 455 *sigtrap = ishpux ? 0x4E42 : 0x4E41; 456 } 457 #endif 458 459 #define SS_RTEFRAME 1 460 #define SS_FPSTATE 2 461 #define SS_USERREGS 4 462 463 struct sigstate { 464 int ss_flags; /* which of the following are valid */ 465 struct frame ss_frame; /* original exception frame */ 466 struct fpframe ss_fpstate; /* 68881/68882 state info */ 467 }; 468 469 /* 470 * WARNING: code in locore.s assumes the layout shown for sf_signum 471 * thru sf_handler so... don't screw with them! 472 */ 473 struct sigframe { 474 int sf_signum; /* signo for handler */ 475 int sf_code; /* additional info for handler */ 476 struct sigcontext *sf_scp; /* context ptr for handler */ 477 sig_t sf_handler; /* handler addr for u_sigc */ 478 struct sigstate sf_state; /* state of the hardware */ 479 struct sigcontext sf_sc; /* actual context */ 480 }; 481 482 #ifdef HPUXCOMPAT 483 struct hpuxsigcontext { 484 int hsc_syscall; 485 char hsc_action; 486 char hsc_pad1; 487 char hsc_pad2; 488 char hsc_onstack; 489 int hsc_mask; 490 int hsc_sp; 491 short hsc_ps; 492 int hsc_pc; 493 /* the rest aren't part of the context but are included for our convenience */ 494 short hsc_pad; 495 u_int hsc_magic; /* XXX sigreturn: cookie */ 496 struct sigcontext *hsc_realsc; /* XXX sigreturn: ptr to BSD context */ 497 }; 498 499 /* 500 * For an HP-UX process, a partial hpuxsigframe follows the normal sigframe. 501 * Tremendous waste of space, but some HP-UX applications (e.g. LCL) need it. 502 */ 503 struct hpuxsigframe { 504 int hsf_signum; 505 int hsf_code; 506 struct sigcontext *hsf_scp; 507 struct hpuxsigcontext hsf_sc; 508 int hsf_regs[15]; 509 }; 510 #endif 511 512 #ifdef DEBUG 513 int sigdebug = 0; 514 int sigpid = 0; 515 #define SDB_FOLLOW 0x01 516 #define SDB_KSTACK 0x02 517 #define SDB_FPSTATE 0x04 518 #endif 519 520 /* 521 * Send an interrupt to process. 522 */ 523 void 524 sendsig(catcher, sig, mask, code) 525 sig_t catcher; 526 int sig, mask; 527 unsigned code; 528 { 529 register struct proc *p = curproc; 530 register struct sigframe *fp, *kfp; 531 register struct frame *frame; 532 register struct sigacts *psp = p->p_sigacts; 533 register short ft; 534 int oonstack, fsize; 535 extern short exframesize[]; 536 extern char sigcode[], esigcode[]; 537 538 frame = (struct frame *)p->p_md.md_regs; 539 ft = frame->f_format; 540 oonstack = psp->ps_sigstk.ss_flags & SA_ONSTACK; 541 /* 542 * Allocate and validate space for the signal handler 543 * context. Note that if the stack is in P0 space, the 544 * call to grow() is a nop, and the useracc() check 545 * will fail if the process has not already allocated 546 * the space with a `brk'. 547 */ 548 #ifdef HPUXCOMPAT 549 if (p->p_flag & SHPUX) 550 fsize = sizeof(struct sigframe) + sizeof(struct hpuxsigframe); 551 else 552 #endif 553 fsize = sizeof(struct sigframe); 554 if ((psp->ps_flags & SAS_ALTSTACK) && 555 (psp->ps_sigstk.ss_flags & SA_ONSTACK) == 0 && 556 (psp->ps_sigonstack & sigmask(sig))) { 557 fp = (struct sigframe *)(psp->ps_sigstk.ss_base + 558 psp->ps_sigstk.ss_size - fsize); 559 psp->ps_sigstk.ss_flags |= SA_ONSTACK; 560 } else 561 fp = (struct sigframe *)(frame->f_regs[SP] - fsize); 562 if ((unsigned)fp <= USRSTACK - ctob(p->p_vmspace->vm_ssize)) 563 (void)grow(p, (unsigned)fp); 564 #ifdef DEBUG 565 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 566 printf("sendsig(%d): sig %d ssp %x usp %x scp %x ft %d\n", 567 p->p_pid, sig, &oonstack, fp, &fp->sf_sc, ft); 568 #endif 569 if (useracc((caddr_t)fp, fsize, B_WRITE) == 0) { 570 #ifdef DEBUG 571 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 572 printf("sendsig(%d): useracc failed on sig %d\n", 573 p->p_pid, sig); 574 #endif 575 /* 576 * Process has trashed its stack; give it an illegal 577 * instruction to halt it in its tracks. 578 */ 579 SIGACTION(p, SIGILL) = SIG_DFL; 580 sig = sigmask(SIGILL); 581 p->p_sigignore &= ~sig; 582 p->p_sigcatch &= ~sig; 583 p->p_sigmask &= ~sig; 584 psignal(p, SIGILL); 585 return; 586 } 587 kfp = (struct sigframe *)malloc((u_long)fsize, M_TEMP, M_WAITOK); 588 /* 589 * Build the argument list for the signal handler. 590 */ 591 kfp->sf_signum = sig; 592 kfp->sf_code = code; 593 kfp->sf_scp = &fp->sf_sc; 594 kfp->sf_handler = catcher; 595 /* 596 * Save necessary hardware state. Currently this includes: 597 * - general registers 598 * - original exception frame (if not a "normal" frame) 599 * - FP coprocessor state 600 */ 601 kfp->sf_state.ss_flags = SS_USERREGS; 602 bcopy((caddr_t)frame->f_regs, 603 (caddr_t)kfp->sf_state.ss_frame.f_regs, sizeof frame->f_regs); 604 if (ft >= FMT9) { 605 #ifdef DEBUG 606 if (ft != FMT9 && ft != FMTA && ft != FMTB) 607 panic("sendsig: bogus frame type"); 608 #endif 609 kfp->sf_state.ss_flags |= SS_RTEFRAME; 610 kfp->sf_state.ss_frame.f_format = frame->f_format; 611 kfp->sf_state.ss_frame.f_vector = frame->f_vector; 612 bcopy((caddr_t)&frame->F_u, 613 (caddr_t)&kfp->sf_state.ss_frame.F_u, exframesize[ft]); 614 /* 615 * Leave an indicator that we need to clean up the kernel 616 * stack. We do this by setting the "pad word" above the 617 * hardware stack frame to the amount the stack must be 618 * adjusted by. 619 * 620 * N.B. we increment rather than just set f_stackadj in 621 * case we are called from syscall when processing a 622 * sigreturn. In that case, f_stackadj may be non-zero. 623 */ 624 frame->f_stackadj += exframesize[ft]; 625 frame->f_format = frame->f_vector = 0; 626 #ifdef DEBUG 627 if (sigdebug & SDB_FOLLOW) 628 printf("sendsig(%d): copy out %d of frame %d\n", 629 p->p_pid, exframesize[ft], ft); 630 #endif 631 } 632 #ifdef FPCOPROC 633 kfp->sf_state.ss_flags |= SS_FPSTATE; 634 m68881_save(&kfp->sf_state.ss_fpstate); 635 #ifdef DEBUG 636 if ((sigdebug & SDB_FPSTATE) && *(char *)&kfp->sf_state.ss_fpstate) 637 printf("sendsig(%d): copy out FP state (%x) to %x\n", 638 p->p_pid, *(u_int *)&kfp->sf_state.ss_fpstate, 639 &kfp->sf_state.ss_fpstate); 640 #endif 641 #endif 642 /* 643 * Build the signal context to be used by sigreturn. 644 */ 645 kfp->sf_sc.sc_onstack = oonstack; 646 kfp->sf_sc.sc_mask = mask; 647 kfp->sf_sc.sc_sp = frame->f_regs[SP]; 648 kfp->sf_sc.sc_fp = frame->f_regs[A6]; 649 kfp->sf_sc.sc_ap = (int)&fp->sf_state; 650 kfp->sf_sc.sc_pc = frame->f_pc; 651 kfp->sf_sc.sc_ps = frame->f_sr; 652 #ifdef HPUXCOMPAT 653 /* 654 * Create an HP-UX style sigcontext structure and associated goo 655 */ 656 if (p->p_flag & SHPUX) { 657 register struct hpuxsigframe *hkfp; 658 659 hkfp = (struct hpuxsigframe *)&kfp[1]; 660 hkfp->hsf_signum = bsdtohpuxsig(kfp->sf_signum); 661 hkfp->hsf_code = kfp->sf_code; 662 hkfp->hsf_scp = (struct sigcontext *) 663 &((struct hpuxsigframe *)(&fp[1]))->hsf_sc; 664 hkfp->hsf_sc.hsc_syscall = 0; /* XXX */ 665 hkfp->hsf_sc.hsc_action = 0; /* XXX */ 666 hkfp->hsf_sc.hsc_pad1 = hkfp->hsf_sc.hsc_pad2 = 0; 667 hkfp->hsf_sc.hsc_onstack = kfp->sf_sc.sc_onstack; 668 hkfp->hsf_sc.hsc_mask = kfp->sf_sc.sc_mask; 669 hkfp->hsf_sc.hsc_sp = kfp->sf_sc.sc_sp; 670 hkfp->hsf_sc.hsc_ps = kfp->sf_sc.sc_ps; 671 hkfp->hsf_sc.hsc_pc = kfp->sf_sc.sc_pc; 672 hkfp->hsf_sc.hsc_pad = 0; 673 hkfp->hsf_sc.hsc_magic = 0xdeadbeef; 674 hkfp->hsf_sc.hsc_realsc = kfp->sf_scp; 675 bcopy((caddr_t)frame->f_regs, (caddr_t)hkfp->hsf_regs, 676 sizeof (hkfp->hsf_regs)); 677 678 kfp->sf_signum = hkfp->hsf_signum; 679 kfp->sf_scp = hkfp->hsf_scp; 680 } 681 #endif 682 (void) copyout((caddr_t)kfp, (caddr_t)fp, fsize); 683 frame->f_regs[SP] = (int)fp; 684 #ifdef DEBUG 685 if (sigdebug & SDB_FOLLOW) 686 printf("sendsig(%d): sig %d scp %x fp %x sc_sp %x sc_ap %x\n", 687 p->p_pid, sig, kfp->sf_scp, fp, 688 kfp->sf_sc.sc_sp, kfp->sf_sc.sc_ap); 689 #endif 690 /* 691 * Signal trampoline code is at base of user stack. 692 */ 693 frame->f_pc = (int)PS_STRINGS - (esigcode - sigcode); 694 #ifdef DEBUG 695 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 696 printf("sendsig(%d): sig %d returns\n", 697 p->p_pid, sig); 698 #endif 699 free((caddr_t)kfp, M_TEMP); 700 } 701 702 /* 703 * System call to cleanup state after a signal 704 * has been taken. Reset signal mask and 705 * stack state from context left by sendsig (above). 706 * Return to previous pc and psl as specified by 707 * context left by sendsig. Check carefully to 708 * make sure that the user has not modified the 709 * psl to gain improper priviledges or to cause 710 * a machine fault. 711 */ 712 /* ARGSUSED */ 713 sigreturn(p, uap, retval) 714 struct proc *p; 715 struct args { 716 struct sigcontext *sigcntxp; 717 } *uap; 718 int *retval; 719 { 720 register struct sigcontext *scp; 721 register struct frame *frame; 722 register int rf; 723 struct sigcontext tsigc; 724 struct sigstate tstate; 725 int flags; 726 extern short exframesize[]; 727 728 scp = uap->sigcntxp; 729 #ifdef DEBUG 730 if (sigdebug & SDB_FOLLOW) 731 printf("sigreturn: pid %d, scp %x\n", p->p_pid, scp); 732 #endif 733 if ((int)scp & 1) 734 return (EINVAL); 735 #ifdef HPUXCOMPAT 736 /* 737 * Grab context as an HP-UX style context and determine if it 738 * was one that we contructed in sendsig. 739 */ 740 if (p->p_flag & SHPUX) { 741 struct hpuxsigcontext *hscp = (struct hpuxsigcontext *)scp; 742 struct hpuxsigcontext htsigc; 743 744 if (useracc((caddr_t)hscp, sizeof (*hscp), B_WRITE) == 0 || 745 copyin((caddr_t)hscp, (caddr_t)&htsigc, sizeof htsigc)) 746 return (EINVAL); 747 /* 748 * If not generated by sendsig or we cannot restore the 749 * BSD-style sigcontext, just restore what we can -- state 750 * will be lost, but them's the breaks. 751 */ 752 hscp = &htsigc; 753 if (hscp->hsc_magic != 0xdeadbeef || 754 (scp = hscp->hsc_realsc) == 0 || 755 useracc((caddr_t)scp, sizeof (*scp), B_WRITE) == 0 || 756 copyin((caddr_t)scp, (caddr_t)&tsigc, sizeof tsigc)) { 757 if (hscp->hsc_onstack & 01) 758 p->p_sigacts->ps_sigstk.ss_flags |= SA_ONSTACK; 759 else 760 p->p_sigacts->ps_sigstk.ss_flags &= ~SA_ONSTACK; 761 p->p_sigmask = hscp->hsc_mask &~ sigcantmask; 762 frame = (struct frame *) p->p_md.md_regs; 763 frame->f_regs[SP] = hscp->hsc_sp; 764 frame->f_pc = hscp->hsc_pc; 765 frame->f_sr = hscp->hsc_ps &~ PSL_USERCLR; 766 return (EJUSTRETURN); 767 } 768 /* 769 * Otherwise, overlay BSD context with possibly modified 770 * HP-UX values. 771 */ 772 tsigc.sc_onstack = hscp->hsc_onstack; 773 tsigc.sc_mask = hscp->hsc_mask; 774 tsigc.sc_sp = hscp->hsc_sp; 775 tsigc.sc_ps = hscp->hsc_ps; 776 tsigc.sc_pc = hscp->hsc_pc; 777 } else 778 #endif 779 /* 780 * Test and fetch the context structure. 781 * We grab it all at once for speed. 782 */ 783 if (useracc((caddr_t)scp, sizeof (*scp), B_WRITE) == 0 || 784 copyin((caddr_t)scp, (caddr_t)&tsigc, sizeof tsigc)) 785 return (EINVAL); 786 scp = &tsigc; 787 if ((scp->sc_ps & (PSL_MBZ|PSL_IPL|PSL_S)) != 0) 788 return (EINVAL); 789 /* 790 * Restore the user supplied information 791 */ 792 if (scp->sc_onstack & 01) 793 p->p_sigacts->ps_sigstk.ss_flags |= SA_ONSTACK; 794 else 795 p->p_sigacts->ps_sigstk.ss_flags &= ~SA_ONSTACK; 796 p->p_sigmask = scp->sc_mask &~ sigcantmask; 797 frame = (struct frame *) p->p_md.md_regs; 798 frame->f_regs[SP] = scp->sc_sp; 799 frame->f_regs[A6] = scp->sc_fp; 800 frame->f_pc = scp->sc_pc; 801 frame->f_sr = scp->sc_ps; 802 /* 803 * Grab pointer to hardware state information. 804 * If zero, the user is probably doing a longjmp. 805 */ 806 if ((rf = scp->sc_ap) == 0) 807 return (EJUSTRETURN); 808 /* 809 * See if there is anything to do before we go to the 810 * expense of copying in close to 1/2K of data 811 */ 812 flags = fuword((caddr_t)rf); 813 #ifdef DEBUG 814 if (sigdebug & SDB_FOLLOW) 815 printf("sigreturn(%d): sc_ap %x flags %x\n", 816 p->p_pid, rf, flags); 817 #endif 818 /* 819 * fuword failed (bogus sc_ap value). 820 */ 821 if (flags == -1) 822 return (EINVAL); 823 if (flags == 0 || copyin((caddr_t)rf, (caddr_t)&tstate, sizeof tstate)) 824 return (EJUSTRETURN); 825 #ifdef DEBUG 826 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 827 printf("sigreturn(%d): ssp %x usp %x scp %x ft %d\n", 828 p->p_pid, &flags, scp->sc_sp, uap->sigcntxp, 829 (flags&SS_RTEFRAME) ? tstate.ss_frame.f_format : -1); 830 #endif 831 /* 832 * Restore most of the users registers except for A6 and SP 833 * which were handled above. 834 */ 835 if (flags & SS_USERREGS) 836 bcopy((caddr_t)tstate.ss_frame.f_regs, 837 (caddr_t)frame->f_regs, sizeof(frame->f_regs)-2*NBPW); 838 /* 839 * Restore long stack frames. Note that we do not copy 840 * back the saved SR or PC, they were picked up above from 841 * the sigcontext structure. 842 */ 843 if (flags & SS_RTEFRAME) { 844 register int sz; 845 846 /* grab frame type and validate */ 847 sz = tstate.ss_frame.f_format; 848 if (sz > 15 || (sz = exframesize[sz]) < 0) 849 return (EINVAL); 850 frame->f_stackadj -= sz; 851 frame->f_format = tstate.ss_frame.f_format; 852 frame->f_vector = tstate.ss_frame.f_vector; 853 bcopy((caddr_t)&tstate.ss_frame.F_u, (caddr_t)&frame->F_u, sz); 854 #ifdef DEBUG 855 if (sigdebug & SDB_FOLLOW) 856 printf("sigreturn(%d): copy in %d of frame type %d\n", 857 p->p_pid, sz, tstate.ss_frame.f_format); 858 #endif 859 } 860 #ifdef FPCOPROC 861 /* 862 * Finally we restore the original FP context 863 */ 864 if (flags & SS_FPSTATE) 865 m68881_restore(&tstate.ss_fpstate); 866 #ifdef DEBUG 867 if ((sigdebug & SDB_FPSTATE) && *(char *)&tstate.ss_fpstate) 868 printf("sigreturn(%d): copied in FP state (%x) at %x\n", 869 p->p_pid, *(u_int *)&tstate.ss_fpstate, 870 &tstate.ss_fpstate); 871 #endif 872 #endif 873 #ifdef DEBUG 874 if ((sigdebug & SDB_FOLLOW) || 875 ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)) 876 printf("sigreturn(%d): returns\n", p->p_pid); 877 #endif 878 return (EJUSTRETURN); 879 } 880 881 int waittime = -1; 882 883 boot(howto) 884 register int howto; 885 { 886 /* take a snap shot before clobbering any registers */ 887 if (curproc) 888 savectx(curproc->p_addr, 0); 889 890 boothowto = howto; 891 if ((howto&RB_NOSYNC) == 0 && waittime < 0 && bfreelist[0].b_forw) { 892 register struct buf *bp; 893 int iter, nbusy; 894 895 waittime = 0; 896 (void) spl0(); 897 printf("syncing disks... "); 898 /* 899 * Release vnodes held by texts before sync. 900 */ 901 if (panicstr == 0) 902 vnode_pager_umount(NULL); 903 #ifdef notdef 904 #include "fd.h" 905 #if NFD > 0 906 fdshutdown(); 907 #endif 908 #endif 909 sync(&proc0, (void *)NULL, (int *)NULL); 910 911 for (iter = 0; iter < 20; iter++) { 912 nbusy = 0; 913 for (bp = &buf[nbuf]; --bp >= buf; ) 914 if ((bp->b_flags & (B_BUSY|B_INVAL)) == B_BUSY) 915 nbusy++; 916 if (nbusy == 0) 917 break; 918 printf("%d ", nbusy); 919 DELAY(40000 * iter); 920 } 921 if (nbusy) 922 printf("giving up\n"); 923 else 924 printf("done\n"); 925 /* 926 * If we've been adjusting the clock, the todr 927 * will be out of synch; adjust it now. 928 */ 929 resettodr(); 930 } 931 splhigh(); /* extreme priority */ 932 if (howto&RB_HALT) { 933 printf("halted\n\n"); 934 asm(" stop #0x2700"); 935 } else { 936 if (howto & RB_DUMP) 937 dumpsys(); 938 doboot(); 939 /*NOTREACHED*/ 940 } 941 /*NOTREACHED*/ 942 } 943 944 int dumpmag = 0x8fca0101; /* magic number for savecore */ 945 int dumpsize = 0; /* also for savecore */ 946 long dumplo = 0; 947 948 dumpconf() 949 { 950 int nblks; 951 952 dumpsize = physmem; 953 if (dumpdev != NODEV && bdevsw[major(dumpdev)].d_psize) { 954 nblks = (*bdevsw[major(dumpdev)].d_psize)(dumpdev); 955 if (dumpsize > btoc(dbtob(nblks - dumplo))) 956 dumpsize = btoc(dbtob(nblks - dumplo)); 957 else if (dumplo == 0) 958 dumplo = nblks - btodb(ctob(physmem)); 959 } 960 /* 961 * Don't dump on the first CLBYTES (why CLBYTES?) 962 * in case the dump device includes a disk label. 963 */ 964 if (dumplo < btodb(CLBYTES)) 965 dumplo = btodb(CLBYTES); 966 } 967 968 /* 969 * Doadump comes here after turning off memory management and 970 * getting on the dump stack, either when called above, or by 971 * the auto-restart code. 972 */ 973 dumpsys() 974 { 975 976 msgbufmapped = 0; 977 if (dumpdev == NODEV) 978 return; 979 /* 980 * For dumps during autoconfiguration, 981 * if dump device has already configured... 982 */ 983 if (dumpsize == 0) 984 dumpconf(); 985 if (dumplo < 0) 986 return; 987 printf("\ndumping to dev %x, offset %d\n", dumpdev, dumplo); 988 printf("dump "); 989 switch ((*bdevsw[major(dumpdev)].d_dump)(dumpdev)) { 990 991 case ENXIO: 992 printf("device bad\n"); 993 break; 994 995 case EFAULT: 996 printf("device not ready\n"); 997 break; 998 999 case EINVAL: 1000 printf("area improper\n"); 1001 break; 1002 1003 case EIO: 1004 printf("i/o error\n"); 1005 break; 1006 1007 default: 1008 printf("succeeded\n"); 1009 break; 1010 } 1011 } 1012 1013 /* 1014 * Return the best possible estimate of the time in the timeval 1015 * to which tvp points. We do this by returning the current time 1016 * plus the amount of time since the last clock interrupt (clock.c:clkread). 1017 * 1018 * Check that this time is no less than any previously-reported time, 1019 * which could happen around the time of a clock adjustment. Just for fun, 1020 * we guarantee that the time will be greater than the value obtained by a 1021 * previous call. 1022 */ 1023 microtime(tvp) 1024 register struct timeval *tvp; 1025 { 1026 int s = splhigh(); 1027 static struct timeval lasttime; 1028 1029 *tvp = time; 1030 tvp->tv_usec += clkread(); 1031 while (tvp->tv_usec > 1000000) { 1032 tvp->tv_sec++; 1033 tvp->tv_usec -= 1000000; 1034 } 1035 if (tvp->tv_sec == lasttime.tv_sec && 1036 tvp->tv_usec <= lasttime.tv_usec && 1037 (tvp->tv_usec = lasttime.tv_usec + 1) > 1000000) { 1038 tvp->tv_sec++; 1039 tvp->tv_usec -= 1000000; 1040 } 1041 lasttime = *tvp; 1042 splx(s); 1043 } 1044 1045 initcpu() 1046 { 1047 parityenable(); 1048 } 1049 1050 straytrap(pc, evec) 1051 int pc; 1052 u_short evec; 1053 { 1054 printf("unexpected trap (vector offset %x) from %x\n", 1055 evec & 0xFFF, pc); 1056 } 1057 1058 int *nofault; 1059 1060 badaddr(addr) 1061 register caddr_t addr; 1062 { 1063 register int i; 1064 label_t faultbuf; 1065 1066 #ifdef lint 1067 i = *addr; if (i) return(0); 1068 #endif 1069 nofault = (int *) &faultbuf; 1070 if (setjmp((label_t *)nofault)) { 1071 nofault = (int *) 0; 1072 return(1); 1073 } 1074 i = *(volatile short *)addr; 1075 nofault = (int *) 0; 1076 return(0); 1077 } 1078 1079 badbaddr(addr) 1080 register caddr_t addr; 1081 { 1082 register int i; 1083 label_t faultbuf; 1084 1085 #ifdef lint 1086 i = *addr; if (i) return(0); 1087 #endif 1088 nofault = (int *) &faultbuf; 1089 if (setjmp((label_t *)nofault)) { 1090 nofault = (int *) 0; 1091 return(1); 1092 } 1093 i = *(volatile char *)addr; 1094 nofault = (int *) 0; 1095 return(0); 1096 } 1097 1098 netintr() 1099 { 1100 #ifdef INET 1101 if (netisr & (1 << NETISR_ARP)) { 1102 netisr &= ~(1 << NETISR_ARP); 1103 arpintr(); 1104 } 1105 if (netisr & (1 << NETISR_IP)) { 1106 netisr &= ~(1 << NETISR_IP); 1107 ipintr(); 1108 } 1109 #endif 1110 #ifdef NS 1111 if (netisr & (1 << NETISR_NS)) { 1112 netisr &= ~(1 << NETISR_NS); 1113 nsintr(); 1114 } 1115 #endif 1116 #ifdef ISO 1117 if (netisr & (1 << NETISR_ISO)) { 1118 netisr &= ~(1 << NETISR_ISO); 1119 clnlintr(); 1120 } 1121 #endif 1122 } 1123 1124 intrhand(sr) 1125 int sr; 1126 { 1127 register struct isr *isr; 1128 register int found = 0; 1129 register int ipl; 1130 extern struct isr isrqueue[]; 1131 1132 ipl = (sr >> 8) & 7; 1133 switch (ipl) { 1134 1135 case 3: 1136 case 4: 1137 case 5: 1138 ipl = ISRIPL(ipl); 1139 isr = isrqueue[ipl].isr_forw; 1140 for (; isr != &isrqueue[ipl]; isr = isr->isr_forw) { 1141 if ((isr->isr_intr)(isr->isr_arg)) { 1142 found++; 1143 break; 1144 } 1145 } 1146 if (found == 0) 1147 printf("stray interrupt, sr 0x%x\n", sr); 1148 break; 1149 1150 case 0: 1151 case 1: 1152 case 2: 1153 case 6: 1154 case 7: 1155 printf("intrhand: unexpected sr 0x%x\n", sr); 1156 break; 1157 } 1158 } 1159 1160 #if defined(DEBUG) && !defined(PANICBUTTON) 1161 #define PANICBUTTON 1162 #endif 1163 1164 #ifdef PANICBUTTON 1165 int panicbutton = 1; /* non-zero if panic buttons are enabled */ 1166 int crashandburn = 0; 1167 int candbdelay = 50; /* give em half a second */ 1168 1169 candbtimer() 1170 { 1171 crashandburn = 0; 1172 } 1173 #endif 1174 1175 /* 1176 * Level 7 interrupts can be caused by the keyboard or parity errors. 1177 */ 1178 nmihand(frame) 1179 struct frame frame; 1180 { 1181 if (kbdnmi()) { 1182 #ifdef PANICBUTTON 1183 static int innmihand = 0; 1184 1185 /* 1186 * Attempt to reduce the window of vulnerability for recursive 1187 * NMIs (e.g. someone holding down the keyboard reset button). 1188 */ 1189 if (innmihand == 0) { 1190 innmihand = 1; 1191 printf("Got a keyboard NMI\n"); 1192 innmihand = 0; 1193 } 1194 if (panicbutton) { 1195 if (crashandburn) { 1196 crashandburn = 0; 1197 panic(panicstr ? 1198 "forced crash, nosync" : "forced crash"); 1199 } 1200 crashandburn++; 1201 timeout(candbtimer, (caddr_t)0, candbdelay); 1202 } 1203 #endif 1204 return; 1205 } 1206 if (parityerror(&frame)) 1207 return; 1208 /* panic?? */ 1209 printf("unexpected level 7 interrupt ignored\n"); 1210 } 1211 1212 /* 1213 * Parity error section. Contains magic. 1214 */ 1215 #define PARREG ((volatile short *)IIOV(0x5B0000)) 1216 static int gotparmem = 0; 1217 #ifdef DEBUG 1218 int ignorekperr = 0; /* ignore kernel parity errors */ 1219 #endif 1220 1221 /* 1222 * Enable parity detection 1223 */ 1224 parityenable() 1225 { 1226 label_t faultbuf; 1227 1228 nofault = (int *) &faultbuf; 1229 if (setjmp((label_t *)nofault)) { 1230 nofault = (int *) 0; 1231 #ifdef DEBUG 1232 printf("No parity memory\n"); 1233 #endif 1234 return; 1235 } 1236 *PARREG = 1; 1237 nofault = (int *) 0; 1238 gotparmem = 1; 1239 #ifdef DEBUG 1240 printf("Parity detection enabled\n"); 1241 #endif 1242 } 1243 1244 /* 1245 * Determine if level 7 interrupt was caused by a parity error 1246 * and deal with it if it was. Returns 1 if it was a parity error. 1247 */ 1248 parityerror(fp) 1249 struct frame *fp; 1250 { 1251 if (!gotparmem) 1252 return(0); 1253 *PARREG = 0; 1254 DELAY(10); 1255 *PARREG = 1; 1256 if (panicstr) { 1257 printf("parity error after panic ignored\n"); 1258 return(1); 1259 } 1260 if (!findparerror()) 1261 printf("WARNING: transient parity error ignored\n"); 1262 else if (USERMODE(fp->f_sr)) { 1263 printf("pid %d: parity error\n", curproc->p_pid); 1264 uprintf("sorry, pid %d killed due to memory parity error\n", 1265 curproc->p_pid); 1266 psignal(curproc, SIGKILL); 1267 #ifdef DEBUG 1268 } else if (ignorekperr) { 1269 printf("WARNING: kernel parity error ignored\n"); 1270 #endif 1271 } else { 1272 regdump(fp->f_regs, 128); 1273 panic("kernel parity error"); 1274 } 1275 return(1); 1276 } 1277 1278 /* 1279 * Yuk! There has got to be a better way to do this! 1280 * Searching all of memory with interrupts blocked can lead to disaster. 1281 */ 1282 findparerror() 1283 { 1284 static label_t parcatch; 1285 static int looking = 0; 1286 volatile struct pte opte; 1287 volatile int pg, o, s; 1288 register volatile int *ip; 1289 register int i; 1290 int found; 1291 1292 #ifdef lint 1293 ip = &found; 1294 i = o = pg = 0; if (i) return(0); 1295 #endif 1296 /* 1297 * If looking is true we are searching for a known parity error 1298 * and it has just occured. All we do is return to the higher 1299 * level invocation. 1300 */ 1301 if (looking) 1302 longjmp(&parcatch); 1303 s = splhigh(); 1304 /* 1305 * If setjmp returns true, the parity error we were searching 1306 * for has just occured (longjmp above) at the current pg+o 1307 */ 1308 if (setjmp(&parcatch)) { 1309 printf("Parity error at 0x%x\n", ctob(pg)|o); 1310 found = 1; 1311 goto done; 1312 } 1313 /* 1314 * If we get here, a parity error has occured for the first time 1315 * and we need to find it. We turn off any external caches and 1316 * loop thru memory, testing every longword til a fault occurs and 1317 * we regain control at setjmp above. Note that because of the 1318 * setjmp, pg and o need to be volatile or their values will be lost. 1319 */ 1320 looking = 1; 1321 ecacheoff(); 1322 for (pg = btoc(lowram); pg < btoc(lowram)+physmem; pg++) { 1323 pmap_enter(kernel_pmap, (vm_offset_t)vmmap, ctob(pg), 1324 VM_PROT_READ, TRUE); 1325 for (o = 0; o < NBPG; o += sizeof(int)) 1326 i = *(int *)(&vmmap[o]); 1327 } 1328 /* 1329 * Getting here implies no fault was found. Should never happen. 1330 */ 1331 printf("Couldn't locate parity error\n"); 1332 found = 0; 1333 done: 1334 looking = 0; 1335 pmap_remove(kernel_pmap, (vm_offset_t)vmmap, 1336 (vm_offset_t)&vmmap[NBPG]); 1337 ecacheon(); 1338 splx(s); 1339 return(found); 1340 } 1341 1342 regdump(rp, sbytes) 1343 int *rp; /* must not be register */ 1344 int sbytes; 1345 { 1346 static int doingdump = 0; 1347 register int i; 1348 int s; 1349 extern char *hexstr(); 1350 1351 if (doingdump) 1352 return; 1353 s = splhigh(); 1354 doingdump = 1; 1355 printf("pid = %d, pc = %s, ", curproc->p_pid, hexstr(rp[PC], 8)); 1356 printf("ps = %s, ", hexstr(rp[PS], 4)); 1357 printf("sfc = %s, ", hexstr(getsfc(), 4)); 1358 printf("dfc = %s\n", hexstr(getdfc(), 4)); 1359 printf("Registers:\n "); 1360 for (i = 0; i < 8; i++) 1361 printf(" %d", i); 1362 printf("\ndreg:"); 1363 for (i = 0; i < 8; i++) 1364 printf(" %s", hexstr(rp[i], 8)); 1365 printf("\nareg:"); 1366 for (i = 0; i < 8; i++) 1367 printf(" %s", hexstr(rp[i+8], 8)); 1368 if (sbytes > 0) { 1369 if (rp[PS] & PSL_S) { 1370 printf("\n\nKernel stack (%s):", 1371 hexstr((int)(((int *)&rp)-1), 8)); 1372 dumpmem(((int *)&rp)-1, sbytes, 0); 1373 } else { 1374 printf("\n\nUser stack (%s):", hexstr(rp[SP], 8)); 1375 dumpmem((int *)rp[SP], sbytes, 1); 1376 } 1377 } 1378 doingdump = 0; 1379 splx(s); 1380 } 1381 1382 extern char kstack[]; 1383 #define KSADDR ((int *)&(kstack[(UPAGES-1)*NBPG])) 1384 1385 dumpmem(ptr, sz, ustack) 1386 register int *ptr; 1387 int sz; 1388 { 1389 register int i, val; 1390 extern char *hexstr(); 1391 1392 for (i = 0; i < sz; i++) { 1393 if ((i & 7) == 0) 1394 printf("\n%s: ", hexstr((int)ptr, 6)); 1395 else 1396 printf(" "); 1397 if (ustack == 1) { 1398 if ((val = fuword(ptr++)) == -1) 1399 break; 1400 } else { 1401 if (ustack == 0 && 1402 (ptr < KSADDR || ptr > KSADDR+(NBPG/4-1))) 1403 break; 1404 val = *ptr++; 1405 } 1406 printf("%s", hexstr(val, 8)); 1407 } 1408 printf("\n"); 1409 } 1410 1411 char * 1412 hexstr(val, len) 1413 register int val; 1414 { 1415 static char nbuf[9]; 1416 register int x, i; 1417 1418 if (len > 8) 1419 return(""); 1420 nbuf[len] = '\0'; 1421 for (i = len-1; i >= 0; --i) { 1422 x = val & 0xF; 1423 if (x > 9) 1424 nbuf[i] = x - 10 + 'A'; 1425 else 1426 nbuf[i] = x + '0'; 1427 val >>= 4; 1428 } 1429 return(nbuf); 1430 } 1431