1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27/* 28 * Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. 29 * Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T 30 * All Rights Reserved 31 */ 32 33#pragma ident "%Z%%M% %I% %E% SMI" 34 35/* 36 * General assembly language routines. 37 * It is the intent of this file to contain routines that are 38 * independent of the specific kernel architecture, and those that are 39 * common across kernel architectures. 40 * As architectures diverge, and implementations of specific 41 * architecture-dependent routines change, the routines should be moved 42 * from this file into the respective ../`arch -k`/subr.s file. 43 */ 44 45#include <sys/asm_linkage.h> 46#include <sys/asm_misc.h> 47#include <sys/panic.h> 48#include <sys/ontrap.h> 49#include <sys/regset.h> 50#include <sys/privregs.h> 51#include <sys/reboot.h> 52#include <sys/psw.h> 53#include <sys/x86_archext.h> 54 55#if defined(__lint) 56#include <sys/types.h> 57#include <sys/systm.h> 58#include <sys/thread.h> 59#include <sys/archsystm.h> 60#include <sys/byteorder.h> 61#include <sys/dtrace.h> 62#else /* __lint */ 63#include "assym.h" 64#endif /* __lint */ 65#include <sys/dditypes.h> 66 67/* 68 * on_fault() 69 * Catch lofault faults. Like setjmp except it returns one 70 * if code following causes uncorrectable fault. Turned off 71 * by calling no_fault(). 72 */ 73 74#if defined(__lint) 75 76/* ARGSUSED */ 77int 78on_fault(label_t *ljb) 79{ return (0); } 80 81void 82no_fault(void) 83{} 84 85#else /* __lint */ 86 87#if defined(__amd64) 88 89 ENTRY(on_fault) 90 movq %gs:CPU_THREAD, %rsi 91 leaq catch_fault(%rip), %rdx 92 movq %rdi, T_ONFAULT(%rsi) /* jumpbuf in t_onfault */ 93 movq %rdx, T_LOFAULT(%rsi) /* catch_fault in t_lofault */ 94 jmp setjmp /* let setjmp do the rest */ 95 96catch_fault: 97 movq %gs:CPU_THREAD, %rsi 98 movq T_ONFAULT(%rsi), %rdi /* address of save area */ 99 xorl %eax, %eax 100 movq %rax, T_ONFAULT(%rsi) /* turn off onfault */ 101 movq %rax, T_LOFAULT(%rsi) /* turn off lofault */ 102 jmp longjmp /* let longjmp do the rest */ 103 SET_SIZE(on_fault) 104 105 ENTRY(no_fault) 106 movq %gs:CPU_THREAD, %rsi 107 xorl %eax, %eax 108 movq %rax, T_ONFAULT(%rsi) /* turn off onfault */ 109 movq %rax, T_LOFAULT(%rsi) /* turn off lofault */ 110 ret 111 SET_SIZE(no_fault) 112 113#elif defined(__i386) 114 115 ENTRY(on_fault) 116 movl %gs:CPU_THREAD, %edx 117 movl 4(%esp), %eax /* jumpbuf address */ 118 leal catch_fault, %ecx 119 movl %eax, T_ONFAULT(%edx) /* jumpbuf in t_onfault */ 120 movl %ecx, T_LOFAULT(%edx) /* catch_fault in t_lofault */ 121 jmp setjmp /* let setjmp do the rest */ 122 123catch_fault: 124 movl %gs:CPU_THREAD, %edx 125 xorl %eax, %eax 126 movl T_ONFAULT(%edx), %ecx /* address of save area */ 127 movl %eax, T_ONFAULT(%edx) /* turn off onfault */ 128 movl %eax, T_LOFAULT(%edx) /* turn off lofault */ 129 pushl %ecx 130 call longjmp /* let longjmp do the rest */ 131 SET_SIZE(on_fault) 132 133 ENTRY(no_fault) 134 movl %gs:CPU_THREAD, %edx 135 xorl %eax, %eax 136 movl %eax, T_ONFAULT(%edx) /* turn off onfault */ 137 movl %eax, T_LOFAULT(%edx) /* turn off lofault */ 138 ret 139 SET_SIZE(no_fault) 140 141#endif /* __i386 */ 142#endif /* __lint */ 143 144/* 145 * Default trampoline code for on_trap() (see <sys/ontrap.h>). We just 146 * do a longjmp(&curthread->t_ontrap->ot_jmpbuf) if this is ever called. 147 */ 148 149#if defined(lint) 150 151void 152on_trap_trampoline(void) 153{} 154 155#else /* __lint */ 156 157#if defined(__amd64) 158 159 ENTRY(on_trap_trampoline) 160 movq %gs:CPU_THREAD, %rsi 161 movq T_ONTRAP(%rsi), %rdi 162 addq $OT_JMPBUF, %rdi 163 jmp longjmp 164 SET_SIZE(on_trap_trampoline) 165 166#elif defined(__i386) 167 168 ENTRY(on_trap_trampoline) 169 movl %gs:CPU_THREAD, %eax 170 movl T_ONTRAP(%eax), %eax 171 addl $OT_JMPBUF, %eax 172 pushl %eax 173 call longjmp 174 SET_SIZE(on_trap_trampoline) 175 176#endif /* __i386 */ 177#endif /* __lint */ 178 179/* 180 * Push a new element on to the t_ontrap stack. Refer to <sys/ontrap.h> for 181 * more information about the on_trap() mechanism. If the on_trap_data is the 182 * same as the topmost stack element, we just modify that element. 183 */ 184#if defined(lint) 185 186/*ARGSUSED*/ 187int 188on_trap(on_trap_data_t *otp, uint_t prot) 189{ return (0); } 190 191#else /* __lint */ 192 193#if defined(__amd64) 194 195 ENTRY(on_trap) 196 movw %si, OT_PROT(%rdi) /* ot_prot = prot */ 197 movw $0, OT_TRAP(%rdi) /* ot_trap = 0 */ 198 leaq on_trap_trampoline(%rip), %rdx /* rdx = &on_trap_trampoline */ 199 movq %rdx, OT_TRAMPOLINE(%rdi) /* ot_trampoline = rdx */ 200 xorl %ecx, %ecx 201 movq %rcx, OT_HANDLE(%rdi) /* ot_handle = NULL */ 202 movq %rcx, OT_PAD1(%rdi) /* ot_pad1 = NULL */ 203 movq %gs:CPU_THREAD, %rdx /* rdx = curthread */ 204 movq T_ONTRAP(%rdx), %rcx /* rcx = curthread->t_ontrap */ 205 cmpq %rdi, %rcx /* if (otp == %rcx) */ 206 je 0f /* don't modify t_ontrap */ 207 208 movq %rcx, OT_PREV(%rdi) /* ot_prev = t_ontrap */ 209 movq %rdi, T_ONTRAP(%rdx) /* curthread->t_ontrap = otp */ 210 2110: addq $OT_JMPBUF, %rdi /* &ot_jmpbuf */ 212 jmp setjmp 213 SET_SIZE(on_trap) 214 215#elif defined(__i386) 216 217 ENTRY(on_trap) 218 movl 4(%esp), %eax /* %eax = otp */ 219 movl 8(%esp), %edx /* %edx = prot */ 220 221 movw %dx, OT_PROT(%eax) /* ot_prot = prot */ 222 movw $0, OT_TRAP(%eax) /* ot_trap = 0 */ 223 leal on_trap_trampoline, %edx /* %edx = &on_trap_trampoline */ 224 movl %edx, OT_TRAMPOLINE(%eax) /* ot_trampoline = %edx */ 225 movl $0, OT_HANDLE(%eax) /* ot_handle = NULL */ 226 movl $0, OT_PAD1(%eax) /* ot_pad1 = NULL */ 227 movl %gs:CPU_THREAD, %edx /* %edx = curthread */ 228 movl T_ONTRAP(%edx), %ecx /* %ecx = curthread->t_ontrap */ 229 cmpl %eax, %ecx /* if (otp == %ecx) */ 230 je 0f /* don't modify t_ontrap */ 231 232 movl %ecx, OT_PREV(%eax) /* ot_prev = t_ontrap */ 233 movl %eax, T_ONTRAP(%edx) /* curthread->t_ontrap = otp */ 234 2350: addl $OT_JMPBUF, %eax /* %eax = &ot_jmpbuf */ 236 movl %eax, 4(%esp) /* put %eax back on the stack */ 237 jmp setjmp /* let setjmp do the rest */ 238 SET_SIZE(on_trap) 239 240#endif /* __i386 */ 241#endif /* __lint */ 242 243/* 244 * Setjmp and longjmp implement non-local gotos using state vectors 245 * type label_t. 246 */ 247 248#if defined(__lint) 249 250/* ARGSUSED */ 251int 252setjmp(label_t *lp) 253{ return (0); } 254 255/* ARGSUSED */ 256void 257longjmp(label_t *lp) 258{} 259 260#else /* __lint */ 261 262#if LABEL_PC != 0 263#error LABEL_PC MUST be defined as 0 for setjmp/longjmp to work as coded 264#endif /* LABEL_PC != 0 */ 265 266#if defined(__amd64) 267 268 ENTRY(setjmp) 269 movq %rsp, LABEL_SP(%rdi) 270 movq %rbp, LABEL_RBP(%rdi) 271 movq %rbx, LABEL_RBX(%rdi) 272 movq %r12, LABEL_R12(%rdi) 273 movq %r13, LABEL_R13(%rdi) 274 movq %r14, LABEL_R14(%rdi) 275 movq %r15, LABEL_R15(%rdi) 276 movq (%rsp), %rdx /* return address */ 277 movq %rdx, (%rdi) /* LABEL_PC is 0 */ 278 xorl %eax, %eax /* return 0 */ 279 ret 280 SET_SIZE(setjmp) 281 282 ENTRY(longjmp) 283 movq LABEL_SP(%rdi), %rsp 284 movq LABEL_RBP(%rdi), %rbp 285 movq LABEL_RBX(%rdi), %rbx 286 movq LABEL_R12(%rdi), %r12 287 movq LABEL_R13(%rdi), %r13 288 movq LABEL_R14(%rdi), %r14 289 movq LABEL_R15(%rdi), %r15 290 movq (%rdi), %rdx /* return address; LABEL_PC is 0 */ 291 movq %rdx, (%rsp) 292 xorl %eax, %eax 293 incl %eax /* return 1 */ 294 ret 295 SET_SIZE(longjmp) 296 297#elif defined(__i386) 298 299 ENTRY(setjmp) 300 movl 4(%esp), %edx /* address of save area */ 301 movl %ebp, LABEL_EBP(%edx) 302 movl %ebx, LABEL_EBX(%edx) 303 movl %esi, LABEL_ESI(%edx) 304 movl %edi, LABEL_EDI(%edx) 305 movl %esp, 4(%edx) 306 movl (%esp), %ecx /* %eip (return address) */ 307 movl %ecx, (%edx) /* LABEL_PC is 0 */ 308 subl %eax, %eax /* return 0 */ 309 ret 310 SET_SIZE(setjmp) 311 312 ENTRY(longjmp) 313 movl 4(%esp), %edx /* address of save area */ 314 movl LABEL_EBP(%edx), %ebp 315 movl LABEL_EBX(%edx), %ebx 316 movl LABEL_ESI(%edx), %esi 317 movl LABEL_EDI(%edx), %edi 318 movl 4(%edx), %esp 319 movl (%edx), %ecx /* %eip (return addr); LABEL_PC is 0 */ 320 movl $1, %eax 321 addl $4, %esp /* pop ret adr */ 322 jmp *%ecx /* indirect */ 323 SET_SIZE(longjmp) 324 325#endif /* __i386 */ 326#endif /* __lint */ 327 328/* 329 * if a() calls b() calls caller(), 330 * caller() returns return address in a(). 331 * (Note: We assume a() and b() are C routines which do the normal entry/exit 332 * sequence.) 333 */ 334 335#if defined(__lint) 336 337caddr_t 338caller(void) 339{ return (0); } 340 341#else /* __lint */ 342 343#if defined(__amd64) 344 345 ENTRY(caller) 346 movq 8(%rbp), %rax /* b()'s return pc, in a() */ 347 ret 348 SET_SIZE(caller) 349 350#elif defined(__i386) 351 352 ENTRY(caller) 353 movl 4(%ebp), %eax /* b()'s return pc, in a() */ 354 ret 355 SET_SIZE(caller) 356 357#endif /* __i386 */ 358#endif /* __lint */ 359 360/* 361 * if a() calls callee(), callee() returns the 362 * return address in a(); 363 */ 364 365#if defined(__lint) 366 367caddr_t 368callee(void) 369{ return (0); } 370 371#else /* __lint */ 372 373#if defined(__amd64) 374 375 ENTRY(callee) 376 movq (%rsp), %rax /* callee()'s return pc, in a() */ 377 ret 378 SET_SIZE(callee) 379 380#elif defined(__i386) 381 382 ENTRY(callee) 383 movl (%esp), %eax /* callee()'s return pc, in a() */ 384 ret 385 SET_SIZE(callee) 386 387#endif /* __i386 */ 388#endif /* __lint */ 389 390/* 391 * return the current frame pointer 392 */ 393 394#if defined(__lint) 395 396greg_t 397getfp(void) 398{ return (0); } 399 400#else /* __lint */ 401 402#if defined(__amd64) 403 404 ENTRY(getfp) 405 movq %rbp, %rax 406 ret 407 SET_SIZE(getfp) 408 409#elif defined(__i386) 410 411 ENTRY(getfp) 412 movl %ebp, %eax 413 ret 414 SET_SIZE(getfp) 415 416#endif /* __i386 */ 417#endif /* __lint */ 418 419/* 420 * Invalidate a single page table entry in the TLB 421 */ 422 423#if defined(__lint) 424 425/* ARGSUSED */ 426void 427mmu_tlbflush_entry(caddr_t m) 428{} 429 430#else /* __lint */ 431 432#if defined(__amd64) 433 434 ENTRY(mmu_tlbflush_entry) 435 invlpg (%rdi) 436 ret 437 SET_SIZE(mmu_tlbflush_entry) 438 439#elif defined(__i386) 440 441 ENTRY(mmu_tlbflush_entry) 442 movl 4(%esp), %eax 443 invlpg (%eax) 444 ret 445 SET_SIZE(mmu_tlbflush_entry) 446 447#endif /* __i386 */ 448#endif /* __lint */ 449 450 451/* 452 * Get/Set the value of various control registers 453 */ 454 455#if defined(__lint) 456 457ulong_t 458getcr0(void) 459{ return (0); } 460 461/* ARGSUSED */ 462void 463setcr0(ulong_t value) 464{} 465 466ulong_t 467getcr2(void) 468{ return (0); } 469 470ulong_t 471getcr3(void) 472{ return (0); } 473 474/* ARGSUSED */ 475void 476setcr3(ulong_t val) 477{} 478 479void 480reload_cr3(void) 481{} 482 483ulong_t 484getcr4(void) 485{ return (0); } 486 487/* ARGSUSED */ 488void 489setcr4(ulong_t val) 490{} 491 492#if defined(__amd64) 493 494ulong_t 495getcr8(void) 496{ return (0); } 497 498/* ARGSUSED */ 499void 500setcr8(ulong_t val) 501{} 502 503#endif /* __amd64 */ 504 505#else /* __lint */ 506 507#if defined(__amd64) 508 509 ENTRY(getcr0) 510 movq %cr0, %rax 511 ret 512 SET_SIZE(getcr0) 513 514 ENTRY(setcr0) 515 movq %rdi, %cr0 516 ret 517 SET_SIZE(setcr0) 518 519 ENTRY(getcr2) 520 movq %cr2, %rax 521 ret 522 SET_SIZE(getcr2) 523 524 ENTRY(getcr3) 525 movq %cr3, %rax 526 ret 527 SET_SIZE(getcr3) 528 529 ENTRY(setcr3) 530 movq %rdi, %cr3 531 ret 532 SET_SIZE(setcr3) 533 534 ENTRY(reload_cr3) 535 movq %cr3, %rdi 536 movq %rdi, %cr3 537 ret 538 SET_SIZE(reload_cr3) 539 540 ENTRY(getcr4) 541 movq %cr4, %rax 542 ret 543 SET_SIZE(getcr4) 544 545 ENTRY(setcr4) 546 movq %rdi, %cr4 547 ret 548 SET_SIZE(setcr4) 549 550 ENTRY(getcr8) 551 movq %cr8, %rax 552 ret 553 SET_SIZE(getcr8) 554 555 ENTRY(setcr8) 556 movq %rdi, %cr8 557 ret 558 SET_SIZE(setcr8) 559 560#elif defined(__i386) 561 562 ENTRY(getcr0) 563 movl %cr0, %eax 564 ret 565 SET_SIZE(getcr0) 566 567 ENTRY(setcr0) 568 movl 4(%esp), %eax 569 movl %eax, %cr0 570 ret 571 SET_SIZE(setcr0) 572 573 ENTRY(getcr2) 574 movl %cr2, %eax 575 ret 576 SET_SIZE(getcr2) 577 578 ENTRY(getcr3) 579 movl %cr3, %eax 580 ret 581 SET_SIZE(getcr3) 582 583 ENTRY(setcr3) 584 movl 4(%esp), %eax 585 movl %eax, %cr3 586 ret 587 SET_SIZE(setcr3) 588 589 ENTRY(reload_cr3) 590 movl %cr3, %eax 591 movl %eax, %cr3 592 ret 593 SET_SIZE(reload_cr3) 594 595 ENTRY(getcr4) 596 movl %cr4, %eax 597 ret 598 SET_SIZE(getcr4) 599 600 ENTRY(setcr4) 601 movl 4(%esp), %eax 602 movl %eax, %cr4 603 ret 604 SET_SIZE(setcr4) 605 606#endif /* __i386 */ 607#endif /* __lint */ 608 609#if defined(__lint) 610 611/*ARGSUSED*/ 612uint32_t 613__cpuid_insn(uint32_t eax, uint32_t *ebxp, uint32_t *ecxp, uint32_t *edxp) 614{ return (0); } 615 616#else /* __lint */ 617 618#if defined(__amd64) 619 620 ENTRY(__cpuid_insn) 621 movq %rbx, %r11 622 movq %rdx, %r8 /* r8 = ecxp */ 623 movq %rcx, %r9 /* r9 = edxp */ 624 movl %edi, %eax 625 cpuid 626 movl %ebx, (%rsi) 627 movl %ecx, (%r8) 628 movl %edx, (%r9) 629 movq %r11, %rbx 630 ret 631 SET_SIZE(__cpuid_insn) 632 633#elif defined(__i386) 634 635 ENTRY(__cpuid_insn) 636 pushl %ebp 637 movl %esp, %ebp 638 pushl %ebx 639 movl 8(%ebp), %eax 640 cpuid 641 pushl %eax 642 movl 0x0c(%ebp), %eax 643 movl %ebx, (%eax) 644 movl 0x10(%ebp), %eax 645 movl %ecx, (%eax) 646 movl 0x14(%ebp), %eax 647 movl %edx, (%eax) 648 popl %eax 649 popl %ebx 650 popl %ebp 651 ret 652 SET_SIZE(__cpuid_insn) 653 654#endif /* __i386 */ 655#endif /* __lint */ 656 657/* 658 * Insert entryp after predp in a doubly linked list. 659 */ 660 661#if defined(__lint) 662 663/*ARGSUSED*/ 664void 665_insque(caddr_t entryp, caddr_t predp) 666{} 667 668#else /* __lint */ 669 670#if defined(__amd64) 671 672 ENTRY(_insque) 673 movq (%rsi), %rax /* predp->forw */ 674 movq %rsi, CPTRSIZE(%rdi) /* entryp->back = predp */ 675 movq %rax, (%rdi) /* entryp->forw = predp->forw */ 676 movq %rdi, (%rsi) /* predp->forw = entryp */ 677 movq %rdi, CPTRSIZE(%rax) /* predp->forw->back = entryp */ 678 ret 679 SET_SIZE(_insque) 680 681#elif defined(__i386) 682 683 ENTRY(_insque) 684 movl 8(%esp), %edx 685 movl 4(%esp), %ecx 686 movl (%edx), %eax /* predp->forw */ 687 movl %edx, CPTRSIZE(%ecx) /* entryp->back = predp */ 688 movl %eax, (%ecx) /* entryp->forw = predp->forw */ 689 movl %ecx, (%edx) /* predp->forw = entryp */ 690 movl %ecx, CPTRSIZE(%eax) /* predp->forw->back = entryp */ 691 ret 692 SET_SIZE(_insque) 693 694#endif /* __i386 */ 695#endif /* __lint */ 696 697/* 698 * Remove entryp from a doubly linked list 699 */ 700 701#if defined(__lint) 702 703/*ARGSUSED*/ 704void 705_remque(caddr_t entryp) 706{} 707 708#else /* __lint */ 709 710#if defined(__amd64) 711 712 ENTRY(_remque) 713 movq (%rdi), %rax /* entry->forw */ 714 movq CPTRSIZE(%rdi), %rdx /* entry->back */ 715 movq %rax, (%rdx) /* entry->back->forw = entry->forw */ 716 movq %rdx, CPTRSIZE(%rax) /* entry->forw->back = entry->back */ 717 ret 718 SET_SIZE(_remque) 719 720#elif defined(__i386) 721 722 ENTRY(_remque) 723 movl 4(%esp), %ecx 724 movl (%ecx), %eax /* entry->forw */ 725 movl CPTRSIZE(%ecx), %edx /* entry->back */ 726 movl %eax, (%edx) /* entry->back->forw = entry->forw */ 727 movl %edx, CPTRSIZE(%eax) /* entry->forw->back = entry->back */ 728 ret 729 SET_SIZE(_remque) 730 731#endif /* __i386 */ 732#endif /* __lint */ 733 734/* 735 * Returns the number of 736 * non-NULL bytes in string argument. 737 */ 738 739#if defined(__lint) 740 741/* ARGSUSED */ 742size_t 743strlen(const char *str) 744{ return (0); } 745 746#else /* __lint */ 747 748#if defined(__amd64) 749 750/* 751 * This is close to a simple transliteration of a C version of this 752 * routine. We should either just -make- this be a C version, or 753 * justify having it in assembler by making it significantly faster. 754 * 755 * size_t 756 * strlen(const char *s) 757 * { 758 * const char *s0; 759 * #if defined(DEBUG) 760 * if ((uintptr_t)s < KERNELBASE) 761 * panic(.str_panic_msg); 762 * #endif 763 * for (s0 = s; *s; s++) 764 * ; 765 * return (s - s0); 766 * } 767 */ 768 769 ENTRY(strlen) 770#ifdef DEBUG 771 movq kernelbase(%rip), %rax 772 cmpq %rax, %rdi 773 jae str_valid 774 pushq %rbp 775 movq %rsp, %rbp 776 leaq .str_panic_msg(%rip), %rdi 777 xorl %eax, %eax 778 call panic 779#endif /* DEBUG */ 780str_valid: 781 cmpb $0, (%rdi) 782 movq %rdi, %rax 783 je .null_found 784 .align 4 785.strlen_loop: 786 incq %rdi 787 cmpb $0, (%rdi) 788 jne .strlen_loop 789.null_found: 790 subq %rax, %rdi 791 movq %rdi, %rax 792 ret 793 SET_SIZE(strlen) 794 795#elif defined(__i386) 796 797 ENTRY(strlen) 798#ifdef DEBUG 799 movl kernelbase, %eax 800 cmpl %eax, 4(%esp) 801 jae str_valid 802 pushl %ebp 803 movl %esp, %ebp 804 pushl $.str_panic_msg 805 call panic 806#endif /* DEBUG */ 807 808str_valid: 809 movl 4(%esp), %eax /* %eax = string address */ 810 testl $3, %eax /* if %eax not word aligned */ 811 jnz .not_word_aligned /* goto .not_word_aligned */ 812 .align 4 813.word_aligned: 814 movl (%eax), %edx /* move 1 word from (%eax) to %edx */ 815 movl $0x7f7f7f7f, %ecx 816 andl %edx, %ecx /* %ecx = %edx & 0x7f7f7f7f */ 817 addl $4, %eax /* next word */ 818 addl $0x7f7f7f7f, %ecx /* %ecx += 0x7f7f7f7f */ 819 orl %edx, %ecx /* %ecx |= %edx */ 820 andl $0x80808080, %ecx /* %ecx &= 0x80808080 */ 821 cmpl $0x80808080, %ecx /* if no null byte in this word */ 822 je .word_aligned /* goto .word_aligned */ 823 subl $4, %eax /* post-incremented */ 824.not_word_aligned: 825 cmpb $0, (%eax) /* if a byte in (%eax) is null */ 826 je .null_found /* goto .null_found */ 827 incl %eax /* next byte */ 828 testl $3, %eax /* if %eax not word aligned */ 829 jnz .not_word_aligned /* goto .not_word_aligned */ 830 jmp .word_aligned /* goto .word_aligned */ 831 .align 4 832.null_found: 833 subl 4(%esp), %eax /* %eax -= string address */ 834 ret 835 SET_SIZE(strlen) 836 837#endif /* __i386 */ 838 839#ifdef DEBUG 840 .text 841.str_panic_msg: 842 .string "strlen: argument below kernelbase" 843#endif /* DEBUG */ 844 845#endif /* __lint */ 846 847 /* 848 * Berkley 4.3 introduced symbolically named interrupt levels 849 * as a way deal with priority in a machine independent fashion. 850 * Numbered priorities are machine specific, and should be 851 * discouraged where possible. 852 * 853 * Note, for the machine specific priorities there are 854 * examples listed for devices that use a particular priority. 855 * It should not be construed that all devices of that 856 * type should be at that priority. It is currently were 857 * the current devices fit into the priority scheme based 858 * upon time criticalness. 859 * 860 * The underlying assumption of these assignments is that 861 * IPL 10 is the highest level from which a device 862 * routine can call wakeup. Devices that interrupt from higher 863 * levels are restricted in what they can do. If they need 864 * kernels services they should schedule a routine at a lower 865 * level (via software interrupt) to do the required 866 * processing. 867 * 868 * Examples of this higher usage: 869 * Level Usage 870 * 14 Profiling clock (and PROM uart polling clock) 871 * 12 Serial ports 872 * 873 * The serial ports request lower level processing on level 6. 874 * 875 * Also, almost all splN routines (where N is a number or a 876 * mnemonic) will do a RAISE(), on the assumption that they are 877 * never used to lower our priority. 878 * The exceptions are: 879 * spl8() Because you can't be above 15 to begin with! 880 * splzs() Because this is used at boot time to lower our 881 * priority, to allow the PROM to poll the uart. 882 * spl0() Used to lower priority to 0. 883 */ 884 885#if defined(__lint) 886 887int spl0(void) { return (0); } 888int spl6(void) { return (0); } 889int spl7(void) { return (0); } 890int spl8(void) { return (0); } 891int splhigh(void) { return (0); } 892int splhi(void) { return (0); } 893int splzs(void) { return (0); } 894 895#else /* __lint */ 896 897/* reg = cpu->cpu_m.cpu_pri; */ 898#define GETIPL_NOGS(reg, cpup) \ 899 movl CPU_PRI(cpup), reg; 900 901/* cpu->cpu_m.cpu_pri; */ 902#define SETIPL_NOGS(val, cpup) \ 903 movl val, CPU_PRI(cpup); 904 905/* reg = cpu->cpu_m.cpu_pri; */ 906#define GETIPL(reg) \ 907 movl %gs:CPU_PRI, reg; 908 909/* cpu->cpu_m.cpu_pri; */ 910#define SETIPL(val) \ 911 movl val, %gs:CPU_PRI; 912 913/* 914 * Macro to raise processor priority level. 915 * Avoid dropping processor priority if already at high level. 916 * Also avoid going below CPU->cpu_base_spl, which could've just been set by 917 * a higher-level interrupt thread that just blocked. 918 */ 919#if defined(__amd64) 920 921#define RAISE(level) \ 922 cli; \ 923 LOADCPU(%rcx); \ 924 movl $/**/level, %edi;\ 925 GETIPL_NOGS(%eax, %rcx);\ 926 cmpl %eax, %edi; \ 927 jg spl; \ 928 jmp setsplhisti 929 930#elif defined(__i386) 931 932#define RAISE(level) \ 933 cli; \ 934 LOADCPU(%ecx); \ 935 movl $/**/level, %edx;\ 936 GETIPL_NOGS(%eax, %ecx);\ 937 cmpl %eax, %edx; \ 938 jg spl; \ 939 jmp setsplhisti 940 941#endif /* __i386 */ 942 943/* 944 * Macro to set the priority to a specified level. 945 * Avoid dropping the priority below CPU->cpu_base_spl. 946 */ 947#if defined(__amd64) 948 949#define SETPRI(level) \ 950 cli; \ 951 LOADCPU(%rcx); \ 952 movl $/**/level, %edi; \ 953 jmp spl 954 955#elif defined(__i386) 956 957#define SETPRI(level) \ 958 cli; \ 959 LOADCPU(%ecx); \ 960 movl $/**/level, %edx; \ 961 jmp spl 962 963#endif /* __i386 */ 964 965 /* locks out all interrupts, including memory errors */ 966 ENTRY(spl8) 967 SETPRI(15) 968 SET_SIZE(spl8) 969 970 /* just below the level that profiling runs */ 971 ENTRY(spl7) 972 RAISE(13) 973 SET_SIZE(spl7) 974 975 /* sun specific - highest priority onboard serial i/o asy ports */ 976 ENTRY(splzs) 977 SETPRI(12) /* Can't be a RAISE, as it's used to lower us */ 978 SET_SIZE(splzs) 979 980 /* 981 * should lock out clocks and all interrupts, 982 * as you can see, there are exceptions 983 */ 984 985#if defined(__amd64) 986 987 .align 16 988 ENTRY(splhi) 989 ALTENTRY(splhigh) 990 ALTENTRY(spl6) 991 ALTENTRY(i_ddi_splhigh) 992 cli 993 LOADCPU(%rcx) 994 movl $DISP_LEVEL, %edi 995 movl CPU_PRI(%rcx), %eax 996 cmpl %eax, %edi 997 jle setsplhisti 998 SETIPL_NOGS(%edi, %rcx) 999 /* 1000 * If we aren't using cr8 to control ipl then we patch this 1001 * with a jump to slow_setsplhi 1002 */ 1003 ALTENTRY(setsplhi_patch) 1004 movq CPU_PRI_DATA(%rcx), %r11 /* get pri data ptr */ 1005 movzb (%r11, %rdi, 1), %rdx /* get apic mask for this ipl */ 1006 movq %rdx, %cr8 /* set new apic priority */ 1007 /* 1008 * enable interrupts 1009 */ 1010setsplhisti: 1011 nop /* patch this to a sti when a proper setspl routine appears */ 1012 ret 1013 1014 ALTENTRY(slow_setsplhi) 1015 pushq %rbp 1016 movq %rsp, %rbp 1017 subq $16, %rsp 1018 movl %eax, -4(%rbp) /* save old ipl */ 1019 call *setspl(%rip) 1020 movl -4(%rbp), %eax /* return old ipl */ 1021 leave 1022 jmp setsplhisti 1023 1024 SET_SIZE(i_ddi_splhigh) 1025 SET_SIZE(spl6) 1026 SET_SIZE(splhigh) 1027 SET_SIZE(splhi) 1028 1029#elif defined(__i386) 1030 1031 .align 16 1032 ENTRY(splhi) 1033 ALTENTRY(splhigh) 1034 ALTENTRY(spl6) 1035 ALTENTRY(i_ddi_splhigh) 1036 cli 1037 LOADCPU(%ecx) 1038 movl $DISP_LEVEL, %edx 1039 movl CPU_PRI(%ecx), %eax 1040 cmpl %eax, %edx 1041 jle setsplhisti 1042 SETIPL_NOGS(%edx, %ecx) /* set new ipl */ 1043 1044 pushl %eax /* save old ipl */ 1045 pushl %edx /* pass new ipl */ 1046 call *setspl 1047 popl %ecx /* dummy pop */ 1048 popl %eax /* return old ipl */ 1049 /* 1050 * enable interrupts 1051 * 1052 * (we patch this to an sti once a proper setspl routine 1053 * is installed) 1054 */ 1055setsplhisti: 1056 nop /* patch this to a sti when a proper setspl routine appears */ 1057 ret 1058 SET_SIZE(i_ddi_splhigh) 1059 SET_SIZE(spl6) 1060 SET_SIZE(splhigh) 1061 SET_SIZE(splhi) 1062 1063#endif /* __i386 */ 1064 1065 /* allow all interrupts */ 1066 ENTRY(spl0) 1067 SETPRI(0) 1068 SET_SIZE(spl0) 1069 1070#endif /* __lint */ 1071 1072/* 1073 * splr is like splx but will only raise the priority and never drop it 1074 */ 1075#if defined(__lint) 1076 1077/* ARGSUSED */ 1078int 1079splr(int level) 1080{ return (0); } 1081 1082#else /* __lint */ 1083 1084#if defined(__amd64) 1085 1086 ENTRY(splr) 1087 cli 1088 LOADCPU(%rcx) 1089 GETIPL_NOGS(%eax, %rcx) 1090 cmpl %eax, %edi /* if new level > current level */ 1091 jg spl /* then set ipl to new level */ 1092splr_setsti: 1093 nop /* patch this to a sti when a proper setspl routine appears */ 1094 ret /* else return the current level */ 1095 SET_SIZE(splr) 1096 1097#elif defined(__i386) 1098 1099 ENTRY(splr) 1100 cli 1101 LOADCPU(%ecx) 1102 movl 4(%esp), %edx /* get new spl level */ 1103 GETIPL_NOGS(%eax, %ecx) 1104 cmpl %eax, %edx /* if new level > current level */ 1105 jg spl /* then set ipl to new level */ 1106splr_setsti: 1107 nop /* patch this to a sti when a proper setspl routine appears */ 1108 ret /* else return the current level */ 1109 SET_SIZE(splr) 1110 1111#endif /* __i386 */ 1112#endif /* __lint */ 1113 1114 1115 1116/* 1117 * splx - set PIL back to that indicated by the level passed as an argument, 1118 * or to the CPU's base priority, whichever is higher. 1119 * Needs to be fall through to spl to save cycles. 1120 * Algorithm for spl: 1121 * 1122 * turn off interrupts 1123 * 1124 * if (CPU->cpu_base_spl > newipl) 1125 * newipl = CPU->cpu_base_spl; 1126 * oldipl = CPU->cpu_pridata->c_ipl; 1127 * CPU->cpu_pridata->c_ipl = newipl; 1128 * 1129 * /indirectly call function to set spl values (usually setpicmasks) 1130 * setspl(); // load new masks into pics 1131 * 1132 * Be careful not to set priority lower than CPU->cpu_base_pri, 1133 * even though it seems we're raising the priority, it could be set 1134 * higher at any time by an interrupt routine, so we must block interrupts 1135 * and look at CPU->cpu_base_pri 1136 */ 1137#if defined(__lint) 1138 1139/* ARGSUSED */ 1140void 1141splx(int level) 1142{} 1143 1144#else /* __lint */ 1145 1146#if defined(__amd64) 1147 1148 ENTRY(splx) 1149 ALTENTRY(i_ddi_splx) 1150 cli /* disable interrupts */ 1151 LOADCPU(%rcx) 1152 /*FALLTHRU*/ 1153 .align 4 1154spl: 1155 /* 1156 * New priority level is in %edi, cpu struct pointer is in %rcx 1157 */ 1158 GETIPL_NOGS(%eax, %rcx) /* get current ipl */ 1159 cmpl %edi, CPU_BASE_SPL(%rcx) /* if (base spl > new ipl) */ 1160 ja set_to_base_spl /* then use base_spl */ 1161 1162setprilev: 1163 SETIPL_NOGS(%edi, %rcx) /* set new ipl */ 1164 /* 1165 * If we aren't using cr8 to control ipl then we patch this 1166 * with a jump to slow_spl 1167 */ 1168 ALTENTRY(spl_patch) 1169 movq CPU_PRI_DATA(%rcx), %r11 /* get pri data ptr */ 1170 movzb (%r11, %rdi, 1), %rdx /* get apic mask for this ipl */ 1171 movq %rdx, %cr8 /* set new apic priority */ 1172 xorl %edx, %edx 1173 bsrl CPU_SOFTINFO(%rcx), %edx /* fls(cpu->cpu_softinfo.st_pending) */ 1174 cmpl %edi, %edx /* new ipl vs. st_pending */ 1175 jle setsplsti 1176 1177 pushq %rbp 1178 movq %rsp, %rbp 1179 /* stack now 16-byte aligned */ 1180 pushq %rax /* save old spl */ 1181 pushq %rdi /* save new ipl too */ 1182 jmp fakesoftint 1183 1184setsplsti: 1185 nop /* patch this to a sti when a proper setspl routine appears */ 1186 ret 1187 1188 ALTENTRY(slow_spl) 1189 pushq %rbp 1190 movq %rsp, %rbp 1191 /* stack now 16-byte aligned */ 1192 1193 pushq %rax /* save old spl */ 1194 pushq %rdi /* save new ipl too */ 1195 1196 call *setspl(%rip) 1197 1198 LOADCPU(%rcx) 1199 movl CPU_SOFTINFO(%rcx), %eax 1200 orl %eax, %eax 1201 jz slow_setsplsti 1202 1203 bsrl %eax, %edx /* fls(cpu->cpu_softinfo.st_pending) */ 1204 cmpl 0(%rsp), %edx /* new ipl vs. st_pending */ 1205 jg fakesoftint 1206 1207 ALTENTRY(fakesoftint_return) 1208 /* 1209 * enable interrupts 1210 */ 1211slow_setsplsti: 1212 nop /* patch this to a sti when a proper setspl routine appears */ 1213 popq %rdi 1214 popq %rax /* return old ipl */ 1215 leave 1216 ret 1217 SET_SIZE(fakesoftint_return) 1218 1219set_to_base_spl: 1220 movl CPU_BASE_SPL(%rcx), %edi 1221 jmp setprilev 1222 SET_SIZE(spl) 1223 SET_SIZE(i_ddi_splx) 1224 SET_SIZE(splx) 1225 1226#elif defined(__i386) 1227 1228 ENTRY(splx) 1229 ALTENTRY(i_ddi_splx) 1230 cli /* disable interrupts */ 1231 LOADCPU(%ecx) 1232 movl 4(%esp), %edx /* get new spl level */ 1233 /*FALLTHRU*/ 1234 1235 .align 4 1236 ALTENTRY(spl) 1237 /* 1238 * New priority level is in %edx 1239 * (doing this early to avoid an AGI in the next instruction) 1240 */ 1241 GETIPL_NOGS(%eax, %ecx) /* get current ipl */ 1242 cmpl %edx, CPU_BASE_SPL(%ecx) /* if ( base spl > new ipl) */ 1243 ja set_to_base_spl /* then use base_spl */ 1244 1245setprilev: 1246 SETIPL_NOGS(%edx, %ecx) /* set new ipl */ 1247 1248 pushl %eax /* save old ipl */ 1249 pushl %edx /* pass new ipl */ 1250 call *setspl 1251 1252 LOADCPU(%ecx) 1253 movl CPU_SOFTINFO(%ecx), %eax 1254 orl %eax, %eax 1255 jz setsplsti 1256 1257 /* 1258 * Before dashing off, check that setsplsti has been patched. 1259 */ 1260 cmpl $NOP_INSTR, setsplsti 1261 je setsplsti 1262 1263 bsrl %eax, %edx 1264 cmpl 0(%esp), %edx 1265 jg fakesoftint 1266 1267 ALTENTRY(fakesoftint_return) 1268 /* 1269 * enable interrupts 1270 */ 1271setsplsti: 1272 nop /* patch this to a sti when a proper setspl routine appears */ 1273 popl %eax 1274 popl %eax / return old ipl 1275 ret 1276 SET_SIZE(fakesoftint_return) 1277 1278set_to_base_spl: 1279 movl CPU_BASE_SPL(%ecx), %edx 1280 jmp setprilev 1281 SET_SIZE(spl) 1282 SET_SIZE(i_ddi_splx) 1283 SET_SIZE(splx) 1284 1285#endif /* __i386 */ 1286#endif /* __lint */ 1287 1288#if defined(__lint) 1289 1290void 1291install_spl(void) 1292{} 1293 1294#else /* __lint */ 1295 1296#if defined(__amd64) 1297 1298 ENTRY_NP(install_spl) 1299 movq %cr0, %rax 1300 movq %rax, %rdx 1301 movl $_BITNOT(CR0_WP), %ecx 1302 movslq %ecx, %rcx 1303 andq %rcx, %rax /* we don't want to take a fault */ 1304 movq %rax, %cr0 1305 jmp 1f 13061: movb $STI_INSTR, setsplsti(%rip) 1307 movb $STI_INSTR, slow_setsplsti(%rip) 1308 movb $STI_INSTR, setsplhisti(%rip) 1309 movb $STI_INSTR, splr_setsti(%rip) 1310 testl $1, intpri_use_cr8(%rip) /* are using %cr8 ? */ 1311 jz 2f /* no, go patch more */ 1312 movq %rdx, %cr0 1313 ret 13142: 1315 /* 1316 * Patch spl functions to use slow spl method 1317 */ 1318 leaq setsplhi_patch(%rip), %rdi /* get patch point addr */ 1319 leaq slow_setsplhi(%rip), %rax /* jmp target */ 1320 subq %rdi, %rax /* calculate jmp distance */ 1321 subq $2, %rax /* minus size of jmp instr */ 1322 shlq $8, %rax /* construct jmp instr */ 1323 addq $JMP_INSTR, %rax 1324 movw %ax, setsplhi_patch(%rip) /* patch in the jmp */ 1325 leaq spl_patch(%rip), %rdi /* get patch point addr */ 1326 leaq slow_spl(%rip), %rax /* jmp target */ 1327 subq %rdi, %rax /* calculate jmp distance */ 1328 subq $2, %rax /* minus size of jmp instr */ 1329 shlq $8, %rax /* construct jmp instr */ 1330 addq $JMP_INSTR, %rax 1331 movw %ax, spl_patch(%rip) /* patch in the jmp */ 1332 /* 1333 * Ensure %cr8 is zero since we aren't using it 1334 */ 1335 xorl %eax, %eax 1336 movq %rax, %cr8 1337 movq %rdx, %cr0 1338 ret 1339 SET_SIZE(install_spl) 1340 1341#elif defined(__i386) 1342 1343 ENTRY_NP(install_spl) 1344 movl %cr0, %eax 1345 movl %eax, %edx 1346 andl $_BITNOT(CR0_WP), %eax /* we don't want to take a fault */ 1347 movl %eax, %cr0 1348 jmp 1f 13491: movb $STI_INSTR, setsplsti 1350 movb $STI_INSTR, setsplhisti 1351 movb $STI_INSTR, splr_setsti 1352 movl %edx, %cr0 1353 ret 1354 SET_SIZE(install_spl) 1355 1356#endif /* __i386 */ 1357#endif /* __lint */ 1358 1359 1360/* 1361 * Get current processor interrupt level 1362 */ 1363 1364#if defined(__lint) 1365 1366int 1367getpil(void) 1368{ return (0); } 1369 1370#else /* __lint */ 1371 1372#if defined(__amd64) 1373 1374 ENTRY(getpil) 1375 GETIPL(%eax) /* priority level into %eax */ 1376 ret 1377 SET_SIZE(getpil) 1378 1379#elif defined(__i386) 1380 1381 ENTRY(getpil) 1382 GETIPL(%eax) /* priority level into %eax */ 1383 ret 1384 SET_SIZE(getpil) 1385 1386#endif /* __i386 */ 1387#endif /* __lint */ 1388 1389#if defined(__i386) 1390 1391/* 1392 * Read and write the %gs register 1393 */ 1394 1395#if defined(__lint) 1396 1397/*ARGSUSED*/ 1398uint16_t 1399getgs(void) 1400{ return (0); } 1401 1402/*ARGSUSED*/ 1403void 1404setgs(uint16_t sel) 1405{} 1406 1407#else /* __lint */ 1408 1409 ENTRY(getgs) 1410 clr %eax 1411 movw %gs, %ax 1412 ret 1413 SET_SIZE(getgs) 1414 1415 ENTRY(setgs) 1416 movw 4(%esp), %gs 1417 ret 1418 SET_SIZE(setgs) 1419 1420#endif /* __lint */ 1421#endif /* __i386 */ 1422 1423#if defined(__lint) 1424 1425void 1426pc_reset(void) 1427{} 1428 1429#else /* __lint */ 1430 1431 ENTRY(pc_reset) 1432 movw $0x64, %dx 1433 movb $0xfe, %al 1434 outb (%dx) 1435 hlt 1436 /*NOTREACHED*/ 1437 SET_SIZE(pc_reset) 1438 1439#endif /* __lint */ 1440 1441/* 1442 * C callable in and out routines 1443 */ 1444 1445#if defined(__lint) 1446 1447/* ARGSUSED */ 1448void 1449outl(int port_address, uint32_t val) 1450{} 1451 1452#else /* __lint */ 1453 1454#if defined(__amd64) 1455 1456 ENTRY(outl) 1457 movw %di, %dx 1458 movl %esi, %eax 1459 outl (%dx) 1460 ret 1461 SET_SIZE(outl) 1462 1463#elif defined(__i386) 1464 1465 .set PORT, 4 1466 .set VAL, 8 1467 1468 ENTRY(outl) 1469 movw PORT(%esp), %dx 1470 movl VAL(%esp), %eax 1471 outl (%dx) 1472 ret 1473 SET_SIZE(outl) 1474 1475#endif /* __i386 */ 1476#endif /* __lint */ 1477 1478#if defined(__lint) 1479 1480/* ARGSUSED */ 1481void 1482outw(int port_address, uint16_t val) 1483{} 1484 1485#else /* __lint */ 1486 1487#if defined(__amd64) 1488 1489 ENTRY(outw) 1490 movw %di, %dx 1491 movw %si, %ax 1492 D16 outl (%dx) /* XX64 why not outw? */ 1493 ret 1494 SET_SIZE(outw) 1495 1496#elif defined(__i386) 1497 1498 ENTRY(outw) 1499 movw PORT(%esp), %dx 1500 movw VAL(%esp), %ax 1501 D16 outl (%dx) 1502 ret 1503 SET_SIZE(outw) 1504 1505#endif /* __i386 */ 1506#endif /* __lint */ 1507 1508#if defined(__lint) 1509 1510/* ARGSUSED */ 1511void 1512outb(int port_address, uint8_t val) 1513{} 1514 1515#else /* __lint */ 1516 1517#if defined(__amd64) 1518 1519 ENTRY(outb) 1520 movw %di, %dx 1521 movb %sil, %al 1522 outb (%dx) 1523 ret 1524 SET_SIZE(outb) 1525 1526#elif defined(__i386) 1527 1528 ENTRY(outb) 1529 movw PORT(%esp), %dx 1530 movb VAL(%esp), %al 1531 outb (%dx) 1532 ret 1533 SET_SIZE(outb) 1534 1535#endif /* __i386 */ 1536#endif /* __lint */ 1537 1538#if defined(__lint) 1539 1540/* ARGSUSED */ 1541uint32_t 1542inl(int port_address) 1543{ return (0); } 1544 1545#else /* __lint */ 1546 1547#if defined(__amd64) 1548 1549 ENTRY(inl) 1550 xorl %eax, %eax 1551 movw %di, %dx 1552 inl (%dx) 1553 ret 1554 SET_SIZE(inl) 1555 1556#elif defined(__i386) 1557 1558 ENTRY(inl) 1559 movw PORT(%esp), %dx 1560 inl (%dx) 1561 ret 1562 SET_SIZE(inl) 1563 1564#endif /* __i386 */ 1565#endif /* __lint */ 1566 1567#if defined(__lint) 1568 1569/* ARGSUSED */ 1570uint16_t 1571inw(int port_address) 1572{ return (0); } 1573 1574#else /* __lint */ 1575 1576#if defined(__amd64) 1577 1578 ENTRY(inw) 1579 xorl %eax, %eax 1580 movw %di, %dx 1581 D16 inl (%dx) 1582 ret 1583 SET_SIZE(inw) 1584 1585#elif defined(__i386) 1586 1587 ENTRY(inw) 1588 subl %eax, %eax 1589 movw PORT(%esp), %dx 1590 D16 inl (%dx) 1591 ret 1592 SET_SIZE(inw) 1593 1594#endif /* __i386 */ 1595#endif /* __lint */ 1596 1597 1598#if defined(__lint) 1599 1600/* ARGSUSED */ 1601uint8_t 1602inb(int port_address) 1603{ return (0); } 1604 1605#else /* __lint */ 1606 1607#if defined(__amd64) 1608 1609 ENTRY(inb) 1610 xorl %eax, %eax 1611 movw %di, %dx 1612 inb (%dx) 1613 ret 1614 SET_SIZE(inb) 1615 1616#elif defined(__i386) 1617 1618 ENTRY(inb) 1619 subl %eax, %eax 1620 movw PORT(%esp), %dx 1621 inb (%dx) 1622 ret 1623 SET_SIZE(inb) 1624 1625#endif /* __i386 */ 1626#endif /* __lint */ 1627 1628 1629#if defined(__lint) 1630 1631/* ARGSUSED */ 1632void 1633repoutsw(int port, uint16_t *addr, int cnt) 1634{} 1635 1636#else /* __lint */ 1637 1638#if defined(__amd64) 1639 1640 ENTRY(repoutsw) 1641 movl %edx, %ecx 1642 movw %di, %dx 1643 rep 1644 D16 outsl 1645 ret 1646 SET_SIZE(repoutsw) 1647 1648#elif defined(__i386) 1649 1650 /* 1651 * The arguments and saved registers are on the stack in the 1652 * following order: 1653 * | cnt | +16 1654 * | *addr | +12 1655 * | port | +8 1656 * | eip | +4 1657 * | esi | <-- %esp 1658 * If additional values are pushed onto the stack, make sure 1659 * to adjust the following constants accordingly. 1660 */ 1661 .set PORT, 8 1662 .set ADDR, 12 1663 .set COUNT, 16 1664 1665 ENTRY(repoutsw) 1666 pushl %esi 1667 movl PORT(%esp), %edx 1668 movl ADDR(%esp), %esi 1669 movl COUNT(%esp), %ecx 1670 rep 1671 D16 outsl 1672 popl %esi 1673 ret 1674 SET_SIZE(repoutsw) 1675 1676#endif /* __i386 */ 1677#endif /* __lint */ 1678 1679 1680#if defined(__lint) 1681 1682/* ARGSUSED */ 1683void 1684repinsw(int port_addr, uint16_t *addr, int cnt) 1685{} 1686 1687#else /* __lint */ 1688 1689#if defined(__amd64) 1690 1691 ENTRY(repinsw) 1692 movl %edx, %ecx 1693 movw %di, %dx 1694 rep 1695 D16 insl 1696 ret 1697 SET_SIZE(repinsw) 1698 1699#elif defined(__i386) 1700 1701 ENTRY(repinsw) 1702 pushl %edi 1703 movl PORT(%esp), %edx 1704 movl ADDR(%esp), %edi 1705 movl COUNT(%esp), %ecx 1706 rep 1707 D16 insl 1708 popl %edi 1709 ret 1710 SET_SIZE(repinsw) 1711 1712#endif /* __i386 */ 1713#endif /* __lint */ 1714 1715 1716#if defined(__lint) 1717 1718/* ARGSUSED */ 1719void 1720repinsb(int port, uint8_t *addr, int count) 1721{} 1722 1723#else /* __lint */ 1724 1725#if defined(__amd64) 1726 1727 ENTRY(repinsb) 1728 movl %edx, %ecx 1729 movw %di, %dx 1730 movq %rsi, %rdi 1731 rep 1732 insb 1733 ret 1734 SET_SIZE(repinsb) 1735 1736#elif defined(__i386) 1737 1738 /* 1739 * The arguments and saved registers are on the stack in the 1740 * following order: 1741 * | cnt | +16 1742 * | *addr | +12 1743 * | port | +8 1744 * | eip | +4 1745 * | esi | <-- %esp 1746 * If additional values are pushed onto the stack, make sure 1747 * to adjust the following constants accordingly. 1748 */ 1749 .set IO_PORT, 8 1750 .set IO_ADDR, 12 1751 .set IO_COUNT, 16 1752 1753 ENTRY(repinsb) 1754 pushl %edi 1755 movl IO_ADDR(%esp), %edi 1756 movl IO_COUNT(%esp), %ecx 1757 movl IO_PORT(%esp), %edx 1758 rep 1759 insb 1760 popl %edi 1761 ret 1762 SET_SIZE(repinsb) 1763 1764#endif /* __i386 */ 1765#endif /* __lint */ 1766 1767 1768/* 1769 * Input a stream of 32-bit words. 1770 * NOTE: count is a DWORD count. 1771 */ 1772#if defined(__lint) 1773 1774/* ARGSUSED */ 1775void 1776repinsd(int port, uint32_t *addr, int count) 1777{} 1778 1779#else /* __lint */ 1780 1781#if defined(__amd64) 1782 1783 ENTRY(repinsd) 1784 movl %edx, %ecx 1785 movw %di, %dx 1786 movq %rsi, %rdi 1787 rep 1788 insl 1789 ret 1790 SET_SIZE(repinsd) 1791 1792#elif defined(__i386) 1793 1794 ENTRY(repinsd) 1795 pushl %edi 1796 movl IO_ADDR(%esp), %edi 1797 movl IO_COUNT(%esp), %ecx 1798 movl IO_PORT(%esp), %edx 1799 rep 1800 insl 1801 popl %edi 1802 ret 1803 SET_SIZE(repinsd) 1804 1805#endif /* __i386 */ 1806#endif /* __lint */ 1807 1808/* 1809 * Output a stream of bytes 1810 * NOTE: count is a byte count 1811 */ 1812#if defined(__lint) 1813 1814/* ARGSUSED */ 1815void 1816repoutsb(int port, uint8_t *addr, int count) 1817{} 1818 1819#else /* __lint */ 1820 1821#if defined(__amd64) 1822 1823 ENTRY(repoutsb) 1824 movl %edx, %ecx 1825 movw %di, %dx 1826 rep 1827 outsb 1828 ret 1829 SET_SIZE(repoutsb) 1830 1831#elif defined(__i386) 1832 1833 ENTRY(repoutsb) 1834 pushl %esi 1835 movl IO_ADDR(%esp), %esi 1836 movl IO_COUNT(%esp), %ecx 1837 movl IO_PORT(%esp), %edx 1838 rep 1839 outsb 1840 popl %esi 1841 ret 1842 SET_SIZE(repoutsb) 1843 1844#endif /* __i386 */ 1845#endif /* __lint */ 1846 1847/* 1848 * Output a stream of 32-bit words 1849 * NOTE: count is a DWORD count 1850 */ 1851#if defined(__lint) 1852 1853/* ARGSUSED */ 1854void 1855repoutsd(int port, uint32_t *addr, int count) 1856{} 1857 1858#else /* __lint */ 1859 1860#if defined(__amd64) 1861 1862 ENTRY(repoutsd) 1863 movl %edx, %ecx 1864 movw %di, %dx 1865 rep 1866 outsl 1867 ret 1868 SET_SIZE(repoutsd) 1869 1870#elif defined(__i386) 1871 1872 ENTRY(repoutsd) 1873 pushl %esi 1874 movl IO_ADDR(%esp), %esi 1875 movl IO_COUNT(%esp), %ecx 1876 movl IO_PORT(%esp), %edx 1877 rep 1878 outsl 1879 popl %esi 1880 ret 1881 SET_SIZE(repoutsd) 1882 1883#endif /* __i386 */ 1884#endif /* __lint */ 1885 1886/* 1887 * void int20(void) 1888 */ 1889 1890#if defined(__lint) 1891 1892void 1893int20(void) 1894{} 1895 1896#else /* __lint */ 1897 1898 ENTRY(int20) 1899 movl boothowto, %eax 1900 andl $RB_DEBUG, %eax 1901 jz 1f 1902 1903 int $20 19041: 1905 rep; ret /* use 2 byte return instruction when branch target */ 1906 /* AMD Software Optimization Guide - Section 6.2 */ 1907 SET_SIZE(int20) 1908 1909#endif /* __lint */ 1910 1911#if defined(__lint) 1912 1913/* ARGSUSED */ 1914int 1915scanc(size_t size, uchar_t *cp, uchar_t *table, uchar_t mask) 1916{ return (0); } 1917 1918#else /* __lint */ 1919 1920#if defined(__amd64) 1921 1922 ENTRY(scanc) 1923 /* rdi == size */ 1924 /* rsi == cp */ 1925 /* rdx == table */ 1926 /* rcx == mask */ 1927 addq %rsi, %rdi /* end = &cp[size] */ 1928.scanloop: 1929 cmpq %rdi, %rsi /* while (cp < end */ 1930 jnb .scandone 1931 movzbq (%rsi), %r8 /* %r8 = *cp */ 1932 incq %rsi /* cp++ */ 1933 testb %cl, (%r8, %rdx) 1934 jz .scanloop /* && (table[*cp] & mask) == 0) */ 1935 decq %rsi /* (fix post-increment) */ 1936.scandone: 1937 movl %edi, %eax 1938 subl %esi, %eax /* return (end - cp) */ 1939 ret 1940 SET_SIZE(scanc) 1941 1942#elif defined(__i386) 1943 1944 ENTRY(scanc) 1945 pushl %edi 1946 pushl %esi 1947 movb 24(%esp), %cl /* mask = %cl */ 1948 movl 16(%esp), %esi /* cp = %esi */ 1949 movl 20(%esp), %edx /* table = %edx */ 1950 movl %esi, %edi 1951 addl 12(%esp), %edi /* end = &cp[size]; */ 1952.scanloop: 1953 cmpl %edi, %esi /* while (cp < end */ 1954 jnb .scandone 1955 movzbl (%esi), %eax /* %al = *cp */ 1956 incl %esi /* cp++ */ 1957 movb (%edx, %eax), %al /* %al = table[*cp] */ 1958 testb %al, %cl 1959 jz .scanloop /* && (table[*cp] & mask) == 0) */ 1960 dec %esi /* post-incremented */ 1961.scandone: 1962 movl %edi, %eax 1963 subl %esi, %eax /* return (end - cp) */ 1964 popl %esi 1965 popl %edi 1966 ret 1967 SET_SIZE(scanc) 1968 1969#endif /* __i386 */ 1970#endif /* __lint */ 1971 1972/* 1973 * Replacement functions for ones that are normally inlined. 1974 * In addition to the copy in i86.il, they are defined here just in case. 1975 */ 1976 1977#if defined(__lint) 1978 1979int 1980intr_clear(void) 1981{ return 0; } 1982 1983int 1984clear_int_flag(void) 1985{ return 0; } 1986 1987#else /* __lint */ 1988 1989#if defined(__amd64) 1990 1991 ENTRY(intr_clear) 1992 ENTRY(clear_int_flag) 1993 pushfq 1994 cli 1995 popq %rax 1996 ret 1997 SET_SIZE(clear_int_flag) 1998 SET_SIZE(intr_clear) 1999 2000#elif defined(__i386) 2001 2002 ENTRY(intr_clear) 2003 ENTRY(clear_int_flag) 2004 pushfl 2005 cli 2006 popl %eax 2007 ret 2008 SET_SIZE(clear_int_flag) 2009 SET_SIZE(intr_clear) 2010 2011#endif /* __i386 */ 2012#endif /* __lint */ 2013 2014#if defined(__lint) 2015 2016struct cpu * 2017curcpup(void) 2018{ return 0; } 2019 2020#else /* __lint */ 2021 2022#if defined(__amd64) 2023 2024 ENTRY(curcpup) 2025 movq %gs:CPU_SELF, %rax 2026 ret 2027 SET_SIZE(curcpup) 2028 2029#elif defined(__i386) 2030 2031 ENTRY(curcpup) 2032 movl %gs:CPU_SELF, %eax 2033 ret 2034 SET_SIZE(curcpup) 2035 2036#endif /* __i386 */ 2037#endif /* __lint */ 2038 2039#if defined(__lint) 2040 2041/* ARGSUSED */ 2042uint32_t 2043htonl(uint32_t i) 2044{ return (0); } 2045 2046/* ARGSUSED */ 2047uint32_t 2048ntohl(uint32_t i) 2049{ return (0); } 2050 2051#else /* __lint */ 2052 2053#if defined(__amd64) 2054 2055 /* XX64 there must be shorter sequences for this */ 2056 ENTRY(htonl) 2057 ALTENTRY(ntohl) 2058 movl %edi, %eax 2059 bswap %eax 2060 ret 2061 SET_SIZE(ntohl) 2062 SET_SIZE(htonl) 2063 2064#elif defined(__i386) 2065 2066 ENTRY(htonl) 2067 ALTENTRY(ntohl) 2068 movl 4(%esp), %eax 2069 bswap %eax 2070 ret 2071 SET_SIZE(ntohl) 2072 SET_SIZE(htonl) 2073 2074#endif /* __i386 */ 2075#endif /* __lint */ 2076 2077#if defined(__lint) 2078 2079/* ARGSUSED */ 2080uint16_t 2081htons(uint16_t i) 2082{ return (0); } 2083 2084/* ARGSUSED */ 2085uint16_t 2086ntohs(uint16_t i) 2087{ return (0); } 2088 2089 2090#else /* __lint */ 2091 2092#if defined(__amd64) 2093 2094 /* XX64 there must be better sequences for this */ 2095 ENTRY(htons) 2096 ALTENTRY(ntohs) 2097 movl %edi, %eax 2098 bswap %eax 2099 shrl $16, %eax 2100 ret 2101 SET_SIZE(ntohs) 2102 SET_SIZE(htons) 2103 2104#elif defined(__i386) 2105 2106 ENTRY(htons) 2107 ALTENTRY(ntohs) 2108 movl 4(%esp), %eax 2109 bswap %eax 2110 shrl $16, %eax 2111 ret 2112 SET_SIZE(ntohs) 2113 SET_SIZE(htons) 2114 2115#endif /* __i386 */ 2116#endif /* __lint */ 2117 2118 2119#if defined(__lint) 2120 2121/* ARGSUSED */ 2122void 2123intr_restore(uint_t i) 2124{ return; } 2125 2126/* ARGSUSED */ 2127void 2128restore_int_flag(int i) 2129{ return; } 2130 2131#else /* __lint */ 2132 2133#if defined(__amd64) 2134 2135 ENTRY(intr_restore) 2136 ENTRY(restore_int_flag) 2137 pushq %rdi 2138 popfq 2139 ret 2140 SET_SIZE(restore_int_flag) 2141 SET_SIZE(intr_restore) 2142 2143#elif defined(__i386) 2144 2145 ENTRY(intr_restore) 2146 ENTRY(restore_int_flag) 2147 pushl 4(%esp) 2148 popfl 2149 ret 2150 SET_SIZE(restore_int_flag) 2151 SET_SIZE(intr_restore) 2152 2153#endif /* __i386 */ 2154#endif /* __lint */ 2155 2156#if defined(__lint) 2157 2158void 2159sti(void) 2160{} 2161 2162#else /* __lint */ 2163 2164 ENTRY(sti) 2165 sti 2166 ret 2167 SET_SIZE(sti) 2168 2169#endif /* __lint */ 2170 2171#if defined(__lint) 2172 2173dtrace_icookie_t 2174dtrace_interrupt_disable(void) 2175{ return (0); } 2176 2177#else /* __lint */ 2178 2179#if defined(__amd64) 2180 2181 ENTRY(dtrace_interrupt_disable) 2182 pushfq 2183 popq %rax 2184 cli 2185 ret 2186 SET_SIZE(dtrace_interrupt_disable) 2187 2188#elif defined(__i386) 2189 2190 ENTRY(dtrace_interrupt_disable) 2191 pushfl 2192 popl %eax 2193 cli 2194 ret 2195 SET_SIZE(dtrace_interrupt_disable) 2196 2197#endif /* __i386 */ 2198#endif /* __lint */ 2199 2200#if defined(__lint) 2201 2202/*ARGSUSED*/ 2203void 2204dtrace_interrupt_enable(dtrace_icookie_t cookie) 2205{} 2206 2207#else /* __lint */ 2208 2209#if defined(__amd64) 2210 2211 ENTRY(dtrace_interrupt_enable) 2212 pushq %rdi 2213 popfq 2214 ret 2215 SET_SIZE(dtrace_interrupt_enable) 2216 2217#elif defined(__i386) 2218 2219 ENTRY(dtrace_interrupt_enable) 2220 movl 4(%esp), %eax 2221 pushl %eax 2222 popfl 2223 ret 2224 SET_SIZE(dtrace_interrupt_enable) 2225 2226#endif /* __i386 */ 2227#endif /* __lint */ 2228 2229 2230#if defined(lint) 2231 2232void 2233dtrace_membar_producer(void) 2234{} 2235 2236void 2237dtrace_membar_consumer(void) 2238{} 2239 2240#else /* __lint */ 2241 2242 ENTRY(dtrace_membar_producer) 2243 rep; ret /* use 2 byte return instruction when branch target */ 2244 /* AMD Software Optimization Guide - Section 6.2 */ 2245 SET_SIZE(dtrace_membar_producer) 2246 2247 ENTRY(dtrace_membar_consumer) 2248 rep; ret /* use 2 byte return instruction when branch target */ 2249 /* AMD Software Optimization Guide - Section 6.2 */ 2250 SET_SIZE(dtrace_membar_consumer) 2251 2252#endif /* __lint */ 2253 2254#if defined(__lint) 2255 2256kthread_id_t 2257threadp(void) 2258{ return ((kthread_id_t)0); } 2259 2260#else /* __lint */ 2261 2262#if defined(__amd64) 2263 2264 ENTRY(threadp) 2265 movq %gs:CPU_THREAD, %rax 2266 ret 2267 SET_SIZE(threadp) 2268 2269#elif defined(__i386) 2270 2271 ENTRY(threadp) 2272 movl %gs:CPU_THREAD, %eax 2273 ret 2274 SET_SIZE(threadp) 2275 2276#endif /* __i386 */ 2277#endif /* __lint */ 2278 2279/* 2280 * Checksum routine for Internet Protocol Headers 2281 */ 2282 2283#if defined(__lint) 2284 2285/* ARGSUSED */ 2286unsigned int 2287ip_ocsum( 2288 ushort_t *address, /* ptr to 1st message buffer */ 2289 int halfword_count, /* length of data */ 2290 unsigned int sum) /* partial checksum */ 2291{ 2292 int i; 2293 unsigned int psum = 0; /* partial sum */ 2294 2295 for (i = 0; i < halfword_count; i++, address++) { 2296 psum += *address; 2297 } 2298 2299 while ((psum >> 16) != 0) { 2300 psum = (psum & 0xffff) + (psum >> 16); 2301 } 2302 2303 psum += sum; 2304 2305 while ((psum >> 16) != 0) { 2306 psum = (psum & 0xffff) + (psum >> 16); 2307 } 2308 2309 return (psum); 2310} 2311 2312#else /* __lint */ 2313 2314#if defined(__amd64) 2315 2316 ENTRY(ip_ocsum) 2317 pushq %rbp 2318 movq %rsp, %rbp 2319#ifdef DEBUG 2320 movq kernelbase(%rip), %rax 2321 cmpq %rax, %rdi 2322 jnb 1f 2323 xorl %eax, %eax 2324 movq %rdi, %rsi 2325 leaq .ip_ocsum_panic_msg(%rip), %rdi 2326 call panic 2327 /*NOTREACHED*/ 2328.ip_ocsum_panic_msg: 2329 .string "ip_ocsum: address 0x%p below kernelbase\n" 23301: 2331#endif 2332 movl %esi, %ecx /* halfword_count */ 2333 movq %rdi, %rsi /* address */ 2334 /* partial sum in %edx */ 2335 xorl %eax, %eax 2336 testl %ecx, %ecx 2337 jz .ip_ocsum_done 2338 testq $3, %rsi 2339 jnz .ip_csum_notaligned 2340.ip_csum_aligned: /* XX64 opportunities for 8-byte operations? */ 2341.next_iter: 2342 /* XX64 opportunities for prefetch? */ 2343 /* XX64 compute csum with 64 bit quantities? */ 2344 subl $32, %ecx 2345 jl .less_than_32 2346 2347 addl 0(%rsi), %edx 2348.only60: 2349 adcl 4(%rsi), %eax 2350.only56: 2351 adcl 8(%rsi), %edx 2352.only52: 2353 adcl 12(%rsi), %eax 2354.only48: 2355 adcl 16(%rsi), %edx 2356.only44: 2357 adcl 20(%rsi), %eax 2358.only40: 2359 adcl 24(%rsi), %edx 2360.only36: 2361 adcl 28(%rsi), %eax 2362.only32: 2363 adcl 32(%rsi), %edx 2364.only28: 2365 adcl 36(%rsi), %eax 2366.only24: 2367 adcl 40(%rsi), %edx 2368.only20: 2369 adcl 44(%rsi), %eax 2370.only16: 2371 adcl 48(%rsi), %edx 2372.only12: 2373 adcl 52(%rsi), %eax 2374.only8: 2375 adcl 56(%rsi), %edx 2376.only4: 2377 adcl 60(%rsi), %eax /* could be adding -1 and -1 with a carry */ 2378.only0: 2379 adcl $0, %eax /* could be adding -1 in eax with a carry */ 2380 adcl $0, %eax 2381 2382 addq $64, %rsi 2383 testl %ecx, %ecx 2384 jnz .next_iter 2385 2386.ip_ocsum_done: 2387 addl %eax, %edx 2388 adcl $0, %edx 2389 movl %edx, %eax /* form a 16 bit checksum by */ 2390 shrl $16, %eax /* adding two halves of 32 bit checksum */ 2391 addw %dx, %ax 2392 adcw $0, %ax 2393 andl $0xffff, %eax 2394 leave 2395 ret 2396 2397.ip_csum_notaligned: 2398 xorl %edi, %edi 2399 movw (%rsi), %di 2400 addl %edi, %edx 2401 adcl $0, %edx 2402 addq $2, %rsi 2403 decl %ecx 2404 jmp .ip_csum_aligned 2405 2406.less_than_32: 2407 addl $32, %ecx 2408 testl $1, %ecx 2409 jz .size_aligned 2410 andl $0xfe, %ecx 2411 movzwl (%rsi, %rcx, 2), %edi 2412 addl %edi, %edx 2413 adcl $0, %edx 2414.size_aligned: 2415 movl %ecx, %edi 2416 shrl $1, %ecx 2417 shl $1, %edi 2418 subq $64, %rdi 2419 addq %rdi, %rsi 2420 leaq .ip_ocsum_jmptbl(%rip), %rdi 2421 leaq (%rdi, %rcx, 8), %rdi 2422 xorl %ecx, %ecx 2423 clc 2424 jmp *(%rdi) 2425 2426 .align 8 2427.ip_ocsum_jmptbl: 2428 .quad .only0, .only4, .only8, .only12, .only16, .only20 2429 .quad .only24, .only28, .only32, .only36, .only40, .only44 2430 .quad .only48, .only52, .only56, .only60 2431 SET_SIZE(ip_ocsum) 2432 2433#elif defined(__i386) 2434 2435 ENTRY(ip_ocsum) 2436 pushl %ebp 2437 movl %esp, %ebp 2438 pushl %ebx 2439 pushl %esi 2440 pushl %edi 2441 movl 12(%ebp), %ecx /* count of half words */ 2442 movl 16(%ebp), %edx /* partial checksum */ 2443 movl 8(%ebp), %esi 2444 xorl %eax, %eax 2445 testl %ecx, %ecx 2446 jz .ip_ocsum_done 2447 2448 testl $3, %esi 2449 jnz .ip_csum_notaligned 2450.ip_csum_aligned: 2451.next_iter: 2452 subl $32, %ecx 2453 jl .less_than_32 2454 2455 addl 0(%esi), %edx 2456.only60: 2457 adcl 4(%esi), %eax 2458.only56: 2459 adcl 8(%esi), %edx 2460.only52: 2461 adcl 12(%esi), %eax 2462.only48: 2463 adcl 16(%esi), %edx 2464.only44: 2465 adcl 20(%esi), %eax 2466.only40: 2467 adcl 24(%esi), %edx 2468.only36: 2469 adcl 28(%esi), %eax 2470.only32: 2471 adcl 32(%esi), %edx 2472.only28: 2473 adcl 36(%esi), %eax 2474.only24: 2475 adcl 40(%esi), %edx 2476.only20: 2477 adcl 44(%esi), %eax 2478.only16: 2479 adcl 48(%esi), %edx 2480.only12: 2481 adcl 52(%esi), %eax 2482.only8: 2483 adcl 56(%esi), %edx 2484.only4: 2485 adcl 60(%esi), %eax /* We could be adding -1 and -1 with a carry */ 2486.only0: 2487 adcl $0, %eax /* we could be adding -1 in eax with a carry */ 2488 adcl $0, %eax 2489 2490 addl $64, %esi 2491 andl %ecx, %ecx 2492 jnz .next_iter 2493 2494.ip_ocsum_done: 2495 addl %eax, %edx 2496 adcl $0, %edx 2497 movl %edx, %eax /* form a 16 bit checksum by */ 2498 shrl $16, %eax /* adding two halves of 32 bit checksum */ 2499 addw %dx, %ax 2500 adcw $0, %ax 2501 andl $0xffff, %eax 2502 popl %edi /* restore registers */ 2503 popl %esi 2504 popl %ebx 2505 leave 2506 ret 2507 2508.ip_csum_notaligned: 2509 xorl %edi, %edi 2510 movw (%esi), %di 2511 addl %edi, %edx 2512 adcl $0, %edx 2513 addl $2, %esi 2514 decl %ecx 2515 jmp .ip_csum_aligned 2516 2517.less_than_32: 2518 addl $32, %ecx 2519 testl $1, %ecx 2520 jz .size_aligned 2521 andl $0xfe, %ecx 2522 movzwl (%esi, %ecx, 2), %edi 2523 addl %edi, %edx 2524 adcl $0, %edx 2525.size_aligned: 2526 movl %ecx, %edi 2527 shrl $1, %ecx 2528 shl $1, %edi 2529 subl $64, %edi 2530 addl %edi, %esi 2531 movl $.ip_ocsum_jmptbl, %edi 2532 lea (%edi, %ecx, 4), %edi 2533 xorl %ecx, %ecx 2534 clc 2535 jmp *(%edi) 2536 SET_SIZE(ip_ocsum) 2537 2538 .data 2539 .align 4 2540 2541.ip_ocsum_jmptbl: 2542 .long .only0, .only4, .only8, .only12, .only16, .only20 2543 .long .only24, .only28, .only32, .only36, .only40, .only44 2544 .long .only48, .only52, .only56, .only60 2545 2546 2547#endif /* __i386 */ 2548#endif /* __lint */ 2549 2550/* 2551 * multiply two long numbers and yield a u_longlong_t result, callable from C. 2552 * Provided to manipulate hrtime_t values. 2553 */ 2554#if defined(__lint) 2555 2556/* result = a * b; */ 2557 2558/* ARGSUSED */ 2559unsigned long long 2560mul32(uint_t a, uint_t b) 2561{ return (0); } 2562 2563#else /* __lint */ 2564 2565#if defined(__amd64) 2566 2567 ENTRY(mul32) 2568 xorl %edx, %edx /* XX64 joe, paranoia? */ 2569 movl %edi, %eax 2570 mull %esi 2571 shlq $32, %rdx 2572 orq %rdx, %rax 2573 ret 2574 SET_SIZE(mul32) 2575 2576#elif defined(__i386) 2577 2578 ENTRY(mul32) 2579 movl 8(%esp), %eax 2580 movl 4(%esp), %ecx 2581 mull %ecx 2582 ret 2583 SET_SIZE(mul32) 2584 2585#endif /* __i386 */ 2586#endif /* __lint */ 2587 2588#if defined(notused) 2589#if defined(__lint) 2590/* ARGSUSED */ 2591void 2592load_pte64(uint64_t *pte, uint64_t pte_value) 2593{} 2594#else /* __lint */ 2595 .globl load_pte64 2596load_pte64: 2597 movl 4(%esp), %eax 2598 movl 8(%esp), %ecx 2599 movl 12(%esp), %edx 2600 movl %edx, 4(%eax) 2601 movl %ecx, (%eax) 2602 ret 2603#endif /* __lint */ 2604#endif /* notused */ 2605 2606#if defined(__lint) 2607 2608/*ARGSUSED*/ 2609void 2610scan_memory(caddr_t addr, size_t size) 2611{} 2612 2613#else /* __lint */ 2614 2615#if defined(__amd64) 2616 2617 ENTRY(scan_memory) 2618 shrq $3, %rsi /* convert %rsi from byte to quadword count */ 2619 jz .scanm_done 2620 movq %rsi, %rcx /* move count into rep control register */ 2621 movq %rdi, %rsi /* move addr into lodsq control reg. */ 2622 rep lodsq /* scan the memory range */ 2623.scanm_done: 2624 rep; ret /* use 2 byte return instruction when branch target */ 2625 /* AMD Software Optimization Guide - Section 6.2 */ 2626 SET_SIZE(scan_memory) 2627 2628#elif defined(__i386) 2629 2630 ENTRY(scan_memory) 2631 pushl %ecx 2632 pushl %esi 2633 movl 16(%esp), %ecx /* move 2nd arg into rep control register */ 2634 shrl $2, %ecx /* convert from byte count to word count */ 2635 jz .scanm_done 2636 movl 12(%esp), %esi /* move 1st arg into lodsw control register */ 2637 .byte 0xf3 /* rep prefix. lame assembler. sigh. */ 2638 lodsl 2639.scanm_done: 2640 popl %esi 2641 popl %ecx 2642 ret 2643 SET_SIZE(scan_memory) 2644 2645#endif /* __i386 */ 2646#endif /* __lint */ 2647 2648 2649#if defined(__lint) 2650 2651/*ARGSUSED */ 2652int 2653lowbit(ulong_t i) 2654{ return (0); } 2655 2656#else /* __lint */ 2657 2658#if defined(__amd64) 2659 2660 ENTRY(lowbit) 2661 movl $-1, %eax 2662 bsfq %rdi, %rax 2663 incl %eax 2664 ret 2665 SET_SIZE(lowbit) 2666 2667#elif defined(__i386) 2668 2669 ENTRY(lowbit) 2670 movl $-1, %eax 2671 bsfl 4(%esp), %eax 2672 incl %eax 2673 ret 2674 SET_SIZE(lowbit) 2675 2676#endif /* __i386 */ 2677#endif /* __lint */ 2678 2679#if defined(__lint) 2680 2681/*ARGSUSED*/ 2682int 2683highbit(ulong_t i) 2684{ return (0); } 2685 2686#else /* __lint */ 2687 2688#if defined(__amd64) 2689 2690 ENTRY(highbit) 2691 movl $-1, %eax 2692 bsrq %rdi, %rax 2693 incl %eax 2694 ret 2695 SET_SIZE(highbit) 2696 2697#elif defined(__i386) 2698 2699 ENTRY(highbit) 2700 movl $-1, %eax 2701 bsrl 4(%esp), %eax 2702 incl %eax 2703 ret 2704 SET_SIZE(highbit) 2705 2706#endif /* __i386 */ 2707#endif /* __lint */ 2708 2709#if defined(__lint) 2710 2711/*ARGSUSED*/ 2712uint64_t 2713rdmsr(uint_t r, uint64_t *mtr) 2714{ return (0); } 2715 2716/*ARGSUSED*/ 2717void 2718wrmsr(uint_t r, const uint64_t *mtr) 2719{} 2720 2721void 2722invalidate_cache(void) 2723{} 2724 2725#else /* __lint */ 2726 2727#if defined(__amd64) 2728 2729 ENTRY(rdmsr) 2730 movl %edi, %ecx 2731 rdmsr 2732 movl %eax, (%rsi) 2733 movl %edx, 4(%rsi) 2734 shlq $32, %rdx 2735 orq %rdx, %rax 2736 ret 2737 SET_SIZE(rdmsr) 2738 2739 ENTRY(wrmsr) 2740 movl (%rsi), %eax 2741 movl 4(%rsi), %edx 2742 movl %edi, %ecx 2743 wrmsr 2744 ret 2745 SET_SIZE(wrmsr) 2746 2747#elif defined(__i386) 2748 2749 ENTRY(rdmsr) 2750 movl 4(%esp), %ecx 2751 rdmsr 2752 movl 8(%esp), %ecx 2753 movl %eax, (%ecx) 2754 movl %edx, 4(%ecx) 2755 ret 2756 SET_SIZE(rdmsr) 2757 2758 ENTRY(wrmsr) 2759 movl 8(%esp), %ecx 2760 movl (%ecx), %eax 2761 movl 4(%ecx), %edx 2762 movl 4(%esp), %ecx 2763 wrmsr 2764 ret 2765 SET_SIZE(wrmsr) 2766 2767#endif /* __i386 */ 2768 2769 ENTRY(invalidate_cache) 2770 wbinvd 2771 ret 2772 SET_SIZE(invalidate_cache) 2773 2774#endif /* __lint */ 2775 2776#if defined(__lint) 2777 2778/*ARGSUSED*/ 2779void getcregs(struct cregs *crp) 2780{} 2781 2782#else /* __lint */ 2783 2784#if defined(__amd64) 2785 2786#define GETMSR(r, off, d) \ 2787 movl $r, %ecx; \ 2788 rdmsr; \ 2789 movl %eax, off(d); \ 2790 movl %edx, off+4(d) 2791 2792 ENTRY_NP(getcregs) 2793 xorl %eax, %eax 2794 movq %rax, CREG_GDT+8(%rdi) 2795 sgdt CREG_GDT(%rdi) /* 10 bytes */ 2796 movq %rax, CREG_IDT+8(%rdi) 2797 sidt CREG_IDT(%rdi) /* 10 bytes */ 2798 movq %rax, CREG_LDT(%rdi) 2799 sldt CREG_LDT(%rdi) /* 2 bytes */ 2800 movq %rax, CREG_TASKR(%rdi) 2801 str CREG_TASKR(%rdi) /* 2 bytes */ 2802 movq %cr0, %rax 2803 movq %rax, CREG_CR0(%rdi) /* cr0 */ 2804 movq %cr2, %rax 2805 movq %rax, CREG_CR2(%rdi) /* cr2 */ 2806 movq %cr3, %rax 2807 movq %rax, CREG_CR3(%rdi) /* cr3 */ 2808 movq %cr4, %rax 2809 movq %rax, CREG_CR8(%rdi) /* cr4 */ 2810 movq %cr8, %rax 2811 movq %rax, CREG_CR8(%rdi) /* cr8 */ 2812 GETMSR(MSR_AMD_KGSBASE, CREG_KGSBASE, %rdi) 2813 GETMSR(MSR_AMD_EFER, CREG_EFER, %rdi) 2814 SET_SIZE(getcregs) 2815 2816#undef GETMSR 2817 2818#elif defined(__i386) 2819 2820 ENTRY_NP(getcregs) 2821 movl 4(%esp), %edx 2822 movw $0, CREG_GDT+6(%edx) 2823 movw $0, CREG_IDT+6(%edx) 2824 sgdt CREG_GDT(%edx) /* gdt */ 2825 sidt CREG_IDT(%edx) /* idt */ 2826 sldt CREG_LDT(%edx) /* ldt */ 2827 str CREG_TASKR(%edx) /* task */ 2828 movl %cr0, %eax 2829 movl %eax, CREG_CR0(%edx) /* cr0 */ 2830 movl %cr2, %eax 2831 movl %eax, CREG_CR2(%edx) /* cr2 */ 2832 movl %cr3, %eax 2833 movl %eax, CREG_CR3(%edx) /* cr3 */ 2834 testl $X86_LARGEPAGE, x86_feature 2835 jz .nocr4 2836 movl %cr4, %eax 2837 movl %eax, CREG_CR4(%edx) /* cr4 */ 2838 jmp .skip 2839.nocr4: 2840 movl $0, CREG_CR4(%edx) 2841.skip: 2842 rep; ret /* use 2 byte return instruction when branch target */ 2843 /* AMD Software Optimization Guide - Section 6.2 */ 2844 SET_SIZE(getcregs) 2845 2846#endif /* __i386 */ 2847#endif /* __lint */ 2848 2849 2850/* 2851 * A panic trigger is a word which is updated atomically and can only be set 2852 * once. We atomically store 0xDEFACEDD and load the old value. If the 2853 * previous value was 0, we succeed and return 1; otherwise return 0. 2854 * This allows a partially corrupt trigger to still trigger correctly. DTrace 2855 * has its own version of this function to allow it to panic correctly from 2856 * probe context. 2857 */ 2858#if defined(__lint) 2859 2860/*ARGSUSED*/ 2861int 2862panic_trigger(int *tp) 2863{ return (0); } 2864 2865/*ARGSUSED*/ 2866int 2867dtrace_panic_trigger(int *tp) 2868{ return (0); } 2869 2870#else /* __lint */ 2871 2872#if defined(__amd64) 2873 2874 ENTRY_NP(panic_trigger) 2875 xorl %eax, %eax 2876 movl $0xdefacedd, %edx 2877 lock 2878 xchgl %edx, (%rdi) 2879 cmpl $0, %edx 2880 je 0f 2881 movl $0, %eax 2882 ret 28830: movl $1, %eax 2884 ret 2885 SET_SIZE(panic_trigger) 2886 2887 ENTRY_NP(dtrace_panic_trigger) 2888 xorl %eax, %eax 2889 movl $0xdefacedd, %edx 2890 lock 2891 xchgl %edx, (%rdi) 2892 cmpl $0, %edx 2893 je 0f 2894 movl $0, %eax 2895 ret 28960: movl $1, %eax 2897 ret 2898 SET_SIZE(dtrace_panic_trigger) 2899 2900#elif defined(__i386) 2901 2902 ENTRY_NP(panic_trigger) 2903 movl 4(%esp), %edx / %edx = address of trigger 2904 movl $0xdefacedd, %eax / %eax = 0xdefacedd 2905 lock / assert lock 2906 xchgl %eax, (%edx) / exchange %eax and the trigger 2907 cmpl $0, %eax / if (%eax == 0x0) 2908 je 0f / return (1); 2909 movl $0, %eax / else 2910 ret / return (0); 29110: movl $1, %eax 2912 ret 2913 SET_SIZE(panic_trigger) 2914 2915 ENTRY_NP(dtrace_panic_trigger) 2916 movl 4(%esp), %edx / %edx = address of trigger 2917 movl $0xdefacedd, %eax / %eax = 0xdefacedd 2918 lock / assert lock 2919 xchgl %eax, (%edx) / exchange %eax and the trigger 2920 cmpl $0, %eax / if (%eax == 0x0) 2921 je 0f / return (1); 2922 movl $0, %eax / else 2923 ret / return (0); 29240: movl $1, %eax 2925 ret 2926 SET_SIZE(dtrace_panic_trigger) 2927 2928#endif /* __i386 */ 2929#endif /* __lint */ 2930 2931/* 2932 * The panic() and cmn_err() functions invoke vpanic() as a common entry point 2933 * into the panic code implemented in panicsys(). vpanic() is responsible 2934 * for passing through the format string and arguments, and constructing a 2935 * regs structure on the stack into which it saves the current register 2936 * values. If we are not dying due to a fatal trap, these registers will 2937 * then be preserved in panicbuf as the current processor state. Before 2938 * invoking panicsys(), vpanic() activates the first panic trigger (see 2939 * common/os/panic.c) and switches to the panic_stack if successful. Note that 2940 * DTrace takes a slightly different panic path if it must panic from probe 2941 * context. Instead of calling panic, it calls into dtrace_vpanic(), which 2942 * sets up the initial stack as vpanic does, calls dtrace_panic_trigger(), and 2943 * branches back into vpanic(). 2944 */ 2945#if defined(__lint) 2946 2947/*ARGSUSED*/ 2948void 2949vpanic(const char *format, va_list alist) 2950{} 2951 2952/*ARGSUSED*/ 2953void 2954dtrace_vpanic(const char *format, va_list alist) 2955{} 2956 2957#else /* __lint */ 2958 2959#if defined(__amd64) 2960 2961 ENTRY_NP(vpanic) /* Initial stack layout: */ 2962 2963 pushq %rbp /* | %rip | 0x60 */ 2964 movq %rsp, %rbp /* | %rbp | 0x58 */ 2965 pushfq /* | rfl | 0x50 */ 2966 pushq %r11 /* | %r11 | 0x48 */ 2967 pushq %r10 /* | %r10 | 0x40 */ 2968 pushq %rbx /* | %rbx | 0x38 */ 2969 pushq %rax /* | %rax | 0x30 */ 2970 pushq %r9 /* | %r9 | 0x28 */ 2971 pushq %r8 /* | %r8 | 0x20 */ 2972 pushq %rcx /* | %rcx | 0x18 */ 2973 pushq %rdx /* | %rdx | 0x10 */ 2974 pushq %rsi /* | %rsi | 0x8 alist */ 2975 pushq %rdi /* | %rdi | 0x0 format */ 2976 2977 movq %rsp, %rbx /* %rbx = current %rsp */ 2978 2979 leaq panic_quiesce(%rip), %rdi /* %rdi = &panic_quiesce */ 2980 call panic_trigger /* %eax = panic_trigger() */ 2981 2982vpanic_common: 2983 cmpl $0, %eax 2984 je 0f 2985 2986 /* 2987 * If panic_trigger() was successful, we are the first to initiate a 2988 * panic: we now switch to the reserved panic_stack before continuing. 2989 */ 2990 leaq panic_stack(%rip), %rsp 2991 addq $PANICSTKSIZE, %rsp 29920: subq $REGSIZE, %rsp 2993 /* 2994 * Now that we've got everything set up, store the register values as 2995 * they were when we entered vpanic() to the designated location in 2996 * the regs structure we allocated on the stack. 2997 */ 2998 movq 0x0(%rbx), %rcx 2999 movq %rcx, REGOFF_RDI(%rsp) 3000 movq 0x8(%rbx), %rcx 3001 movq %rcx, REGOFF_RSI(%rsp) 3002 movq 0x10(%rbx), %rcx 3003 movq %rcx, REGOFF_RDX(%rsp) 3004 movq 0x18(%rbx), %rcx 3005 movq %rcx, REGOFF_RCX(%rsp) 3006 movq 0x20(%rbx), %rcx 3007 3008 movq %rcx, REGOFF_R8(%rsp) 3009 movq 0x28(%rbx), %rcx 3010 movq %rcx, REGOFF_R9(%rsp) 3011 movq 0x30(%rbx), %rcx 3012 movq %rcx, REGOFF_RAX(%rsp) 3013 movq 0x38(%rbx), %rcx 3014 movq %rbx, REGOFF_RBX(%rsp) 3015 movq 0x58(%rbx), %rcx 3016 3017 movq %rcx, REGOFF_RBP(%rsp) 3018 movq 0x40(%rbx), %rcx 3019 movq %rcx, REGOFF_R10(%rsp) 3020 movq 0x48(%rbx), %rcx 3021 movq %rcx, REGOFF_R11(%rsp) 3022 movq %r12, REGOFF_R12(%rsp) 3023 3024 movq %r13, REGOFF_R13(%rsp) 3025 movq %r14, REGOFF_R14(%rsp) 3026 movq %r15, REGOFF_R15(%rsp) 3027 3028 movl $MSR_AMD_FSBASE, %ecx 3029 rdmsr 3030 movl %eax, REGOFF_FSBASE(%rsp) 3031 movl %edx, REGOFF_FSBASE+4(%rsp) 3032 3033 movl $MSR_AMD_GSBASE, %ecx 3034 rdmsr 3035 movl %eax, REGOFF_GSBASE(%rsp) 3036 movl %edx, REGOFF_GSBASE+4(%rsp) 3037 3038 xorl %ecx, %ecx 3039 movw %ds, %cx 3040 movq %rcx, REGOFF_DS(%rsp) 3041 movw %es, %cx 3042 movq %rcx, REGOFF_ES(%rsp) 3043 movw %fs, %cx 3044 movq %rcx, REGOFF_FS(%rsp) 3045 movw %gs, %cx 3046 movq %rcx, REGOFF_GS(%rsp) 3047 3048 movq $0, REGOFF_TRAPNO(%rsp) 3049 3050 movq $0, REGOFF_ERR(%rsp) 3051 leaq vpanic(%rip), %rcx 3052 movq %rcx, REGOFF_RIP(%rsp) 3053 movw %cs, %cx 3054 movzwq %cx, %rcx 3055 movq %rcx, REGOFF_CS(%rsp) 3056 movq 0x50(%rbx), %rcx 3057 movq %rcx, REGOFF_RFL(%rsp) 3058 movq %rbx, %rcx 3059 addq $0x60, %rcx 3060 movq %rcx, REGOFF_RSP(%rsp) 3061 movw %ss, %cx 3062 movzwq %cx, %rcx 3063 movq %rcx, REGOFF_SS(%rsp) 3064 3065 /* 3066 * panicsys(format, alist, rp, on_panic_stack) 3067 */ 3068 movq REGOFF_RDI(%rsp), %rdi /* format */ 3069 movq REGOFF_RSI(%rsp), %rsi /* alist */ 3070 movq %rsp, %rdx /* struct regs */ 3071 movl %eax, %ecx /* on_panic_stack */ 3072 call panicsys 3073 addq $REGSIZE, %rsp 3074 popq %rdi 3075 popq %rsi 3076 popq %rdx 3077 popq %rcx 3078 popq %r8 3079 popq %r9 3080 popq %rax 3081 popq %rbx 3082 popq %r10 3083 popq %r11 3084 popfq 3085 leave 3086 ret 3087 SET_SIZE(vpanic) 3088 3089 ENTRY_NP(dtrace_vpanic) /* Initial stack layout: */ 3090 3091 pushq %rbp /* | %rip | 0x60 */ 3092 movq %rsp, %rbp /* | %rbp | 0x58 */ 3093 pushfq /* | rfl | 0x50 */ 3094 pushq %r11 /* | %r11 | 0x48 */ 3095 pushq %r10 /* | %r10 | 0x40 */ 3096 pushq %rbx /* | %rbx | 0x38 */ 3097 pushq %rax /* | %rax | 0x30 */ 3098 pushq %r9 /* | %r9 | 0x28 */ 3099 pushq %r8 /* | %r8 | 0x20 */ 3100 pushq %rcx /* | %rcx | 0x18 */ 3101 pushq %rdx /* | %rdx | 0x10 */ 3102 pushq %rsi /* | %rsi | 0x8 alist */ 3103 pushq %rdi /* | %rdi | 0x0 format */ 3104 3105 movq %rsp, %rbx /* %rbx = current %rsp */ 3106 3107 leaq panic_quiesce(%rip), %rdi /* %rdi = &panic_quiesce */ 3108 call dtrace_panic_trigger /* %eax = dtrace_panic_trigger() */ 3109 jmp vpanic_common 3110 3111 SET_SIZE(dtrace_vpanic) 3112 3113#elif defined(__i386) 3114 3115 ENTRY_NP(vpanic) / Initial stack layout: 3116 3117 pushl %ebp / | %eip | 20 3118 movl %esp, %ebp / | %ebp | 16 3119 pushl %eax / | %eax | 12 3120 pushl %ebx / | %ebx | 8 3121 pushl %ecx / | %ecx | 4 3122 pushl %edx / | %edx | 0 3123 3124 movl %esp, %ebx / %ebx = current stack pointer 3125 3126 lea panic_quiesce, %eax / %eax = &panic_quiesce 3127 pushl %eax / push &panic_quiesce 3128 call panic_trigger / %eax = panic_trigger() 3129 addl $4, %esp / reset stack pointer 3130 3131vpanic_common: 3132 cmpl $0, %eax / if (%eax == 0) 3133 je 0f / goto 0f; 3134 3135 /* 3136 * If panic_trigger() was successful, we are the first to initiate a 3137 * panic: we now switch to the reserved panic_stack before continuing. 3138 */ 3139 lea panic_stack, %esp / %esp = panic_stack 3140 addl $PANICSTKSIZE, %esp / %esp += PANICSTKSIZE 3141 31420: subl $REGSIZE, %esp / allocate struct regs 3143 3144 /* 3145 * Now that we've got everything set up, store the register values as 3146 * they were when we entered vpanic() to the designated location in 3147 * the regs structure we allocated on the stack. 3148 */ 3149#if !defined(__GNUC_AS__) 3150 movw %gs, %edx 3151 movl %edx, REGOFF_GS(%esp) 3152 movw %fs, %edx 3153 movl %edx, REGOFF_FS(%esp) 3154 movw %es, %edx 3155 movl %edx, REGOFF_ES(%esp) 3156 movw %ds, %edx 3157 movl %edx, REGOFF_DS(%esp) 3158#else /* __GNUC_AS__ */ 3159 mov %gs, %edx 3160 mov %edx, REGOFF_GS(%esp) 3161 mov %fs, %edx 3162 mov %edx, REGOFF_FS(%esp) 3163 mov %es, %edx 3164 mov %edx, REGOFF_ES(%esp) 3165 mov %ds, %edx 3166 mov %edx, REGOFF_DS(%esp) 3167#endif /* __GNUC_AS__ */ 3168 movl %edi, REGOFF_EDI(%esp) 3169 movl %esi, REGOFF_ESI(%esp) 3170 movl 16(%ebx), %ecx 3171 movl %ecx, REGOFF_EBP(%esp) 3172 movl %ebx, %ecx 3173 addl $20, %ecx 3174 movl %ecx, REGOFF_ESP(%esp) 3175 movl 8(%ebx), %ecx 3176 movl %ecx, REGOFF_EBX(%esp) 3177 movl 0(%ebx), %ecx 3178 movl %ecx, REGOFF_EDX(%esp) 3179 movl 4(%ebx), %ecx 3180 movl %ecx, REGOFF_ECX(%esp) 3181 movl 12(%ebx), %ecx 3182 movl %ecx, REGOFF_EAX(%esp) 3183 movl $0, REGOFF_TRAPNO(%esp) 3184 movl $0, REGOFF_ERR(%esp) 3185 lea vpanic, %ecx 3186 movl %ecx, REGOFF_EIP(%esp) 3187#if !defined(__GNUC_AS__) 3188 movw %cs, %edx 3189#else /* __GNUC_AS__ */ 3190 mov %cs, %edx 3191#endif /* __GNUC_AS__ */ 3192 movl %edx, REGOFF_CS(%esp) 3193 pushfl 3194 popl %ecx 3195 movl %ecx, REGOFF_EFL(%esp) 3196 movl $0, REGOFF_UESP(%esp) 3197#if !defined(__GNUC_AS__) 3198 movw %ss, %edx 3199#else /* __GNUC_AS__ */ 3200 mov %ss, %edx 3201#endif /* __GNUC_AS__ */ 3202 movl %edx, REGOFF_SS(%esp) 3203 3204 movl %esp, %ecx / %ecx = ®s 3205 pushl %eax / push on_panic_stack 3206 pushl %ecx / push ®s 3207 movl 12(%ebp), %ecx / %ecx = alist 3208 pushl %ecx / push alist 3209 movl 8(%ebp), %ecx / %ecx = format 3210 pushl %ecx / push format 3211 call panicsys / panicsys(); 3212 addl $16, %esp / pop arguments 3213 3214 addl $REGSIZE, %esp 3215 popl %edx 3216 popl %ecx 3217 popl %ebx 3218 popl %eax 3219 leave 3220 ret 3221 SET_SIZE(vpanic) 3222 3223 ENTRY_NP(dtrace_vpanic) / Initial stack layout: 3224 3225 pushl %ebp / | %eip | 20 3226 movl %esp, %ebp / | %ebp | 16 3227 pushl %eax / | %eax | 12 3228 pushl %ebx / | %ebx | 8 3229 pushl %ecx / | %ecx | 4 3230 pushl %edx / | %edx | 0 3231 3232 movl %esp, %ebx / %ebx = current stack pointer 3233 3234 lea panic_quiesce, %eax / %eax = &panic_quiesce 3235 pushl %eax / push &panic_quiesce 3236 call dtrace_panic_trigger / %eax = dtrace_panic_trigger() 3237 addl $4, %esp / reset stack pointer 3238 jmp vpanic_common / jump back to common code 3239 3240 SET_SIZE(dtrace_vpanic) 3241 3242#endif /* __i386 */ 3243#endif /* __lint */ 3244 3245#if defined(__lint) 3246 3247void 3248hres_tick(void) 3249{} 3250 3251int64_t timedelta; 3252hrtime_t hres_last_tick; 3253timestruc_t hrestime; 3254int64_t hrestime_adj; 3255volatile int hres_lock; 3256uint_t nsec_scale; 3257hrtime_t hrtime_base; 3258 3259#else /* __lint */ 3260 3261 DGDEF3(hrestime, _MUL(2, CLONGSIZE), 8) 3262 .NWORD 0, 0 3263 3264 DGDEF3(hrestime_adj, 8, 8) 3265 .long 0, 0 3266 3267 DGDEF3(hres_last_tick, 8, 8) 3268 .long 0, 0 3269 3270 DGDEF3(timedelta, 8, 8) 3271 .long 0, 0 3272 3273 DGDEF3(hres_lock, 4, 8) 3274 .long 0 3275 3276 /* 3277 * initialized to a non zero value to make pc_gethrtime() 3278 * work correctly even before clock is initialized 3279 */ 3280 DGDEF3(hrtime_base, 8, 8) 3281 .long _MUL(NSEC_PER_CLOCK_TICK, 6), 0 3282 3283 DGDEF3(adj_shift, 4, 4) 3284 .long ADJ_SHIFT 3285 3286#if defined(__amd64) 3287 3288 ENTRY_NP(hres_tick) 3289 pushq %rbp 3290 movq %rsp, %rbp 3291 3292 /* 3293 * We need to call *gethrtimef before picking up CLOCK_LOCK (obviously, 3294 * hres_last_tick can only be modified while holding CLOCK_LOCK). 3295 * At worst, performing this now instead of under CLOCK_LOCK may 3296 * introduce some jitter in pc_gethrestime(). 3297 */ 3298 call *gethrtimef(%rip) 3299 movq %rax, %r8 3300 3301 leaq hres_lock(%rip), %rax 3302 movb $-1, %dl 3303.CL1: 3304 xchgb %dl, (%rax) 3305 testb %dl, %dl 3306 jz .CL3 /* got it */ 3307.CL2: 3308 cmpb $0, (%rax) /* possible to get lock? */ 3309 pause 3310 jne .CL2 3311 jmp .CL1 /* yes, try again */ 3312.CL3: 3313 /* 3314 * compute the interval since last time hres_tick was called 3315 * and adjust hrtime_base and hrestime accordingly 3316 * hrtime_base is an 8 byte value (in nsec), hrestime is 3317 * a timestruc_t (sec, nsec) 3318 */ 3319 leaq hres_last_tick(%rip), %rax 3320 movq %r8, %r11 3321 subq (%rax), %r8 3322 addq %r8, hrtime_base(%rip) /* add interval to hrtime_base */ 3323 addq %r8, hrestime+8(%rip) /* add interval to hrestime.tv_nsec */ 3324 /* 3325 * Now that we have CLOCK_LOCK, we can update hres_last_tick 3326 */ 3327 movq %r11, (%rax) 3328 3329 call __adj_hrestime 3330 3331 /* 3332 * release the hres_lock 3333 */ 3334 incl hres_lock(%rip) 3335 leave 3336 ret 3337 SET_SIZE(hres_tick) 3338 3339#elif defined(__i386) 3340 3341 ENTRY_NP(hres_tick) 3342 pushl %ebp 3343 movl %esp, %ebp 3344 pushl %esi 3345 pushl %ebx 3346 3347 /* 3348 * We need to call *gethrtimef before picking up CLOCK_LOCK (obviously, 3349 * hres_last_tick can only be modified while holding CLOCK_LOCK). 3350 * At worst, performing this now instead of under CLOCK_LOCK may 3351 * introduce some jitter in pc_gethrestime(). 3352 */ 3353 call *gethrtimef 3354 movl %eax, %ebx 3355 movl %edx, %esi 3356 3357 movl $hres_lock, %eax 3358 movl $-1, %edx 3359.CL1: 3360 xchgb %dl, (%eax) 3361 testb %dl, %dl 3362 jz .CL3 / got it 3363.CL2: 3364 cmpb $0, (%eax) / possible to get lock? 3365 pause 3366 jne .CL2 3367 jmp .CL1 / yes, try again 3368.CL3: 3369 /* 3370 * compute the interval since last time hres_tick was called 3371 * and adjust hrtime_base and hrestime accordingly 3372 * hrtime_base is an 8 byte value (in nsec), hrestime is 3373 * timestruc_t (sec, nsec) 3374 */ 3375 3376 lea hres_last_tick, %eax 3377 3378 movl %ebx, %edx 3379 movl %esi, %ecx 3380 3381 subl (%eax), %edx 3382 sbbl 4(%eax), %ecx 3383 3384 addl %edx, hrtime_base / add interval to hrtime_base 3385 adcl %ecx, hrtime_base+4 3386 3387 addl %edx, hrestime+4 / add interval to hrestime.tv_nsec 3388 3389 / 3390 / Now that we have CLOCK_LOCK, we can update hres_last_tick. 3391 / 3392 movl %ebx, (%eax) 3393 movl %esi, 4(%eax) 3394 3395 / get hrestime at this moment. used as base for pc_gethrestime 3396 / 3397 / Apply adjustment, if any 3398 / 3399 / #define HRES_ADJ (NSEC_PER_CLOCK_TICK >> ADJ_SHIFT) 3400 / (max_hres_adj) 3401 / 3402 / void 3403 / adj_hrestime() 3404 / { 3405 / long long adj; 3406 / 3407 / if (hrestime_adj == 0) 3408 / adj = 0; 3409 / else if (hrestime_adj > 0) { 3410 / if (hrestime_adj < HRES_ADJ) 3411 / adj = hrestime_adj; 3412 / else 3413 / adj = HRES_ADJ; 3414 / } 3415 / else { 3416 / if (hrestime_adj < -(HRES_ADJ)) 3417 / adj = -(HRES_ADJ); 3418 / else 3419 / adj = hrestime_adj; 3420 / } 3421 / 3422 / timedelta -= adj; 3423 / hrestime_adj = timedelta; 3424 / hrestime.tv_nsec += adj; 3425 / 3426 / while (hrestime.tv_nsec >= NANOSEC) { 3427 / one_sec++; 3428 / hrestime.tv_sec++; 3429 / hrestime.tv_nsec -= NANOSEC; 3430 / } 3431 / } 3432__adj_hrestime: 3433 movl hrestime_adj, %esi / if (hrestime_adj == 0) 3434 movl hrestime_adj+4, %edx 3435 andl %esi, %esi 3436 jne .CL4 / no 3437 andl %edx, %edx 3438 jne .CL4 / no 3439 subl %ecx, %ecx / yes, adj = 0; 3440 subl %edx, %edx 3441 jmp .CL5 3442.CL4: 3443 subl %ecx, %ecx 3444 subl %eax, %eax 3445 subl %esi, %ecx 3446 sbbl %edx, %eax 3447 andl %eax, %eax / if (hrestime_adj > 0) 3448 jge .CL6 3449 3450 / In the following comments, HRES_ADJ is used, while in the code 3451 / max_hres_adj is used. 3452 / 3453 / The test for "hrestime_adj < HRES_ADJ" is complicated because 3454 / hrestime_adj is 64-bits, while HRES_ADJ is 32-bits. We rely 3455 / on the logical equivalence of: 3456 / 3457 / !(hrestime_adj < HRES_ADJ) 3458 / 3459 / and the two step sequence: 3460 / 3461 / (HRES_ADJ - lsw(hrestime_adj)) generates a Borrow/Carry 3462 / 3463 / which computes whether or not the least significant 32-bits 3464 / of hrestime_adj is greater than HRES_ADJ, followed by: 3465 / 3466 / Previous Borrow/Carry + -1 + msw(hrestime_adj) generates a Carry 3467 / 3468 / which generates a carry whenever step 1 is true or the most 3469 / significant long of the longlong hrestime_adj is non-zero. 3470 3471 movl max_hres_adj, %ecx / hrestime_adj is positive 3472 subl %esi, %ecx 3473 movl %edx, %eax 3474 adcl $-1, %eax 3475 jnc .CL7 3476 movl max_hres_adj, %ecx / adj = HRES_ADJ; 3477 subl %edx, %edx 3478 jmp .CL5 3479 3480 / The following computation is similar to the one above. 3481 / 3482 / The test for "hrestime_adj < -(HRES_ADJ)" is complicated because 3483 / hrestime_adj is 64-bits, while HRES_ADJ is 32-bits. We rely 3484 / on the logical equivalence of: 3485 / 3486 / (hrestime_adj > -HRES_ADJ) 3487 / 3488 / and the two step sequence: 3489 / 3490 / (HRES_ADJ + lsw(hrestime_adj)) generates a Carry 3491 / 3492 / which means the least significant 32-bits of hrestime_adj is 3493 / greater than -HRES_ADJ, followed by: 3494 / 3495 / Previous Carry + 0 + msw(hrestime_adj) generates a Carry 3496 / 3497 / which generates a carry only when step 1 is true and the most 3498 / significant long of the longlong hrestime_adj is -1. 3499 3500.CL6: / hrestime_adj is negative 3501 movl %esi, %ecx 3502 addl max_hres_adj, %ecx 3503 movl %edx, %eax 3504 adcl $0, %eax 3505 jc .CL7 3506 xor %ecx, %ecx 3507 subl max_hres_adj, %ecx / adj = -(HRES_ADJ); 3508 movl $-1, %edx 3509 jmp .CL5 3510.CL7: 3511 movl %esi, %ecx / adj = hrestime_adj; 3512.CL5: 3513 movl timedelta, %esi 3514 subl %ecx, %esi 3515 movl timedelta+4, %eax 3516 sbbl %edx, %eax 3517 movl %esi, timedelta 3518 movl %eax, timedelta+4 / timedelta -= adj; 3519 movl %esi, hrestime_adj 3520 movl %eax, hrestime_adj+4 / hrestime_adj = timedelta; 3521 addl hrestime+4, %ecx 3522 3523 movl %ecx, %eax / eax = tv_nsec 35241: 3525 cmpl $NANOSEC, %eax / if ((unsigned long)tv_nsec >= NANOSEC) 3526 jb .CL8 / no 3527 incl one_sec / yes, one_sec++; 3528 incl hrestime / hrestime.tv_sec++; 3529 addl $-NANOSEC, %eax / tv_nsec -= NANOSEC 3530 jmp 1b / check for more seconds 3531 3532.CL8: 3533 movl %eax, hrestime+4 / store final into hrestime.tv_nsec 3534 incl hres_lock / release the hres_lock 3535 3536 popl %ebx 3537 popl %esi 3538 leave 3539 ret 3540 SET_SIZE(hres_tick) 3541 3542#endif /* __i386 */ 3543#endif /* __lint */ 3544 3545/* 3546 * void prefetch_smap_w(void *) 3547 * 3548 * Prefetch ahead within a linear list of smap structures. 3549 * Not implemented for ia32. Stub for compatibility. 3550 */ 3551 3552#if defined(__lint) 3553 3554/*ARGSUSED*/ 3555void prefetch_smap_w(void *smp) 3556{} 3557 3558#else /* __lint */ 3559 3560 ENTRY(prefetch_smap_w) 3561 rep; ret /* use 2 byte return instruction when branch target */ 3562 /* AMD Software Optimization Guide - Section 6.2 */ 3563 SET_SIZE(prefetch_smap_w) 3564 3565#endif /* __lint */ 3566 3567/* 3568 * prefetch_page_r(page_t *) 3569 * issue prefetch instructions for a page_t 3570 */ 3571#if defined(__lint) 3572 3573/*ARGSUSED*/ 3574void 3575prefetch_page_r(void *pp) 3576{} 3577 3578#else /* __lint */ 3579 3580 ENTRY(prefetch_page_r) 3581 rep; ret /* use 2 byte return instruction when branch target */ 3582 /* AMD Software Optimization Guide - Section 6.2 */ 3583 SET_SIZE(prefetch_page_r) 3584 3585#endif /* __lint */ 3586 3587#if defined(__lint) 3588 3589/*ARGSUSED*/ 3590int 3591bcmp(const void *s1, const void *s2, size_t count) 3592{ return (0); } 3593 3594#else /* __lint */ 3595 3596#if defined(__amd64) 3597 3598 ENTRY(bcmp) 3599 pushq %rbp 3600 movq %rsp, %rbp 3601#ifdef DEBUG 3602 movq kernelbase(%rip), %r11 3603 cmpq %r11, %rdi 3604 jb 0f 3605 cmpq %r11, %rsi 3606 jnb 1f 36070: leaq .bcmp_panic_msg(%rip), %rdi 3608 xorl %eax, %eax 3609 call panic 36101: 3611#endif /* DEBUG */ 3612 call memcmp 3613 testl %eax, %eax 3614 setne %dl 3615 leave 3616 movzbl %dl, %eax 3617 ret 3618 SET_SIZE(bcmp) 3619 3620#elif defined(__i386) 3621 3622#define ARG_S1 8 3623#define ARG_S2 12 3624#define ARG_LENGTH 16 3625 3626 ENTRY(bcmp) 3627#ifdef DEBUG 3628 pushl %ebp 3629 movl %esp, %ebp 3630 movl kernelbase, %eax 3631 cmpl %eax, ARG_S1(%ebp) 3632 jb 0f 3633 cmpl %eax, ARG_S2(%ebp) 3634 jnb 1f 36350: pushl $.bcmp_panic_msg 3636 call panic 36371: popl %ebp 3638#endif /* DEBUG */ 3639 3640 pushl %edi / save register variable 3641 movl ARG_S1(%esp), %eax / %eax = address of string 1 3642 movl ARG_S2(%esp), %ecx / %ecx = address of string 2 3643 cmpl %eax, %ecx / if the same string 3644 je .equal / goto .equal 3645 movl ARG_LENGTH(%esp), %edi / %edi = length in bytes 3646 cmpl $4, %edi / if %edi < 4 3647 jb .byte_check / goto .byte_check 3648 .align 4 3649.word_loop: 3650 movl (%ecx), %edx / move 1 word from (%ecx) to %edx 3651 leal -4(%edi), %edi / %edi -= 4 3652 cmpl (%eax), %edx / compare 1 word from (%eax) with %edx 3653 jne .word_not_equal / if not equal, goto .word_not_equal 3654 leal 4(%ecx), %ecx / %ecx += 4 (next word) 3655 leal 4(%eax), %eax / %eax += 4 (next word) 3656 cmpl $4, %edi / if %edi >= 4 3657 jae .word_loop / goto .word_loop 3658.byte_check: 3659 cmpl $0, %edi / if %edi == 0 3660 je .equal / goto .equal 3661 jmp .byte_loop / goto .byte_loop (checks in bytes) 3662.word_not_equal: 3663 leal 4(%edi), %edi / %edi += 4 (post-decremented) 3664 .align 4 3665.byte_loop: 3666 movb (%ecx), %dl / move 1 byte from (%ecx) to %dl 3667 cmpb %dl, (%eax) / compare %dl with 1 byte from (%eax) 3668 jne .not_equal / if not equal, goto .not_equal 3669 incl %ecx / %ecx++ (next byte) 3670 incl %eax / %eax++ (next byte) 3671 decl %edi / %edi-- 3672 jnz .byte_loop / if not zero, goto .byte_loop 3673.equal: 3674 xorl %eax, %eax / %eax = 0 3675 popl %edi / restore register variable 3676 ret / return (NULL) 3677 .align 4 3678.not_equal: 3679 movl $1, %eax / return 1 3680 popl %edi / restore register variable 3681 ret / return (NULL) 3682 SET_SIZE(bcmp) 3683 3684#endif /* __i386 */ 3685 3686#ifdef DEBUG 3687 .text 3688.bcmp_panic_msg: 3689 .string "bcmp: arguments below kernelbase" 3690#endif /* DEBUG */ 3691 3692#endif /* __lint */ 3693