17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5d8aa0f5aSsudheer * Common Development and Distribution License (the "License"). 6d8aa0f5aSsudheer * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 2197eda132Sraf 227c478bd9Sstevel@tonic-gate /* 23eae0da43Ssethg * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 287c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 297c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 307c478bd9Sstevel@tonic-gate /* */ 317c478bd9Sstevel@tonic-gate /* Copyright (c) 1987, 1988 Microsoft Corporation */ 327c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 337c478bd9Sstevel@tonic-gate /* */ 347c478bd9Sstevel@tonic-gate 357c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 367c478bd9Sstevel@tonic-gate 377c478bd9Sstevel@tonic-gate #include <sys/types.h> 387c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h> 397c478bd9Sstevel@tonic-gate #include <sys/param.h> 407c478bd9Sstevel@tonic-gate #include <sys/signal.h> 417c478bd9Sstevel@tonic-gate #include <sys/systm.h> 427c478bd9Sstevel@tonic-gate #include <sys/user.h> 437c478bd9Sstevel@tonic-gate #include <sys/proc.h> 447c478bd9Sstevel@tonic-gate #include <sys/disp.h> 457c478bd9Sstevel@tonic-gate #include <sys/class.h> 467c478bd9Sstevel@tonic-gate #include <sys/core.h> 477c478bd9Sstevel@tonic-gate #include <sys/syscall.h> 487c478bd9Sstevel@tonic-gate #include <sys/cpuvar.h> 497c478bd9Sstevel@tonic-gate #include <sys/vm.h> 507c478bd9Sstevel@tonic-gate #include <sys/sysinfo.h> 517c478bd9Sstevel@tonic-gate #include <sys/fault.h> 527c478bd9Sstevel@tonic-gate #include <sys/stack.h> 537c478bd9Sstevel@tonic-gate #include <sys/psw.h> 547c478bd9Sstevel@tonic-gate #include <sys/regset.h> 557c478bd9Sstevel@tonic-gate #include <sys/fp.h> 567c478bd9Sstevel@tonic-gate #include <sys/trap.h> 577c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 587c478bd9Sstevel@tonic-gate #include <sys/vtrace.h> 597c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 607c478bd9Sstevel@tonic-gate #include <sys/prsystm.h> 617c478bd9Sstevel@tonic-gate #include <sys/mutex_impl.h> 627c478bd9Sstevel@tonic-gate #include <sys/machsystm.h> 637c478bd9Sstevel@tonic-gate #include <sys/archsystm.h> 647c478bd9Sstevel@tonic-gate #include <sys/sdt.h> 657c478bd9Sstevel@tonic-gate #include <sys/avintr.h> 667c478bd9Sstevel@tonic-gate #include <sys/kobj.h> 677c478bd9Sstevel@tonic-gate 687c478bd9Sstevel@tonic-gate #include <vm/hat.h> 697c478bd9Sstevel@tonic-gate 707c478bd9Sstevel@tonic-gate #include <vm/seg_kmem.h> 717c478bd9Sstevel@tonic-gate #include <vm/as.h> 727c478bd9Sstevel@tonic-gate #include <vm/seg.h> 737c478bd9Sstevel@tonic-gate #include <vm/hat_pte.h> 74ae115bc7Smrj #include <vm/hat_i86.h> 757c478bd9Sstevel@tonic-gate 767c478bd9Sstevel@tonic-gate #include <sys/procfs.h> 777c478bd9Sstevel@tonic-gate 787c478bd9Sstevel@tonic-gate #include <sys/reboot.h> 797c478bd9Sstevel@tonic-gate #include <sys/debug.h> 807c478bd9Sstevel@tonic-gate #include <sys/debugreg.h> 817c478bd9Sstevel@tonic-gate #include <sys/modctl.h> 827c478bd9Sstevel@tonic-gate #include <sys/aio_impl.h> 837c478bd9Sstevel@tonic-gate #include <sys/tnf.h> 847c478bd9Sstevel@tonic-gate #include <sys/tnf_probe.h> 857c478bd9Sstevel@tonic-gate #include <sys/cred.h> 867c478bd9Sstevel@tonic-gate #include <sys/mman.h> 877c478bd9Sstevel@tonic-gate #include <sys/x86_archext.h> 887c478bd9Sstevel@tonic-gate #include <sys/copyops.h> 897c478bd9Sstevel@tonic-gate #include <c2/audit.h> 907c478bd9Sstevel@tonic-gate #include <sys/ftrace.h> 917c478bd9Sstevel@tonic-gate #include <sys/panic.h> 927c478bd9Sstevel@tonic-gate #include <sys/traptrace.h> 937c478bd9Sstevel@tonic-gate #include <sys/ontrap.h> 947c478bd9Sstevel@tonic-gate #include <sys/cpc_impl.h> 95ae115bc7Smrj #include <sys/bootconf.h> 96ae115bc7Smrj #include <sys/bootinfo.h> 97ae115bc7Smrj #include <sys/promif.h> 98ae115bc7Smrj #include <sys/mach_mmu.h> 99843e1988Sjohnlev #if defined(__xpv) 100843e1988Sjohnlev #include <sys/hypervisor.h> 101843e1988Sjohnlev #endif 10220c794b3Sgavinm #include <sys/contract/process_impl.h> 1037c478bd9Sstevel@tonic-gate 1047c478bd9Sstevel@tonic-gate #define USER 0x10000 /* user-mode flag added to trap type */ 1057c478bd9Sstevel@tonic-gate 1067c478bd9Sstevel@tonic-gate static const char *trap_type_mnemonic[] = { 1077c478bd9Sstevel@tonic-gate "de", "db", "2", "bp", 1087c478bd9Sstevel@tonic-gate "of", "br", "ud", "nm", 1097c478bd9Sstevel@tonic-gate "df", "9", "ts", "np", 1107c478bd9Sstevel@tonic-gate "ss", "gp", "pf", "15", 1117c478bd9Sstevel@tonic-gate "mf", "ac", "mc", "xf" 1127c478bd9Sstevel@tonic-gate }; 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate static const char *trap_type[] = { 1157c478bd9Sstevel@tonic-gate "Divide error", /* trap id 0 */ 1167c478bd9Sstevel@tonic-gate "Debug", /* trap id 1 */ 1177c478bd9Sstevel@tonic-gate "NMI interrupt", /* trap id 2 */ 1187c478bd9Sstevel@tonic-gate "Breakpoint", /* trap id 3 */ 1197c478bd9Sstevel@tonic-gate "Overflow", /* trap id 4 */ 1207c478bd9Sstevel@tonic-gate "BOUND range exceeded", /* trap id 5 */ 1217c478bd9Sstevel@tonic-gate "Invalid opcode", /* trap id 6 */ 1227c478bd9Sstevel@tonic-gate "Device not available", /* trap id 7 */ 1237c478bd9Sstevel@tonic-gate "Double fault", /* trap id 8 */ 1247c478bd9Sstevel@tonic-gate "Coprocessor segment overrun", /* trap id 9 */ 1257c478bd9Sstevel@tonic-gate "Invalid TSS", /* trap id 10 */ 1267c478bd9Sstevel@tonic-gate "Segment not present", /* trap id 11 */ 1277c478bd9Sstevel@tonic-gate "Stack segment fault", /* trap id 12 */ 1287c478bd9Sstevel@tonic-gate "General protection", /* trap id 13 */ 1297c478bd9Sstevel@tonic-gate "Page fault", /* trap id 14 */ 1307c478bd9Sstevel@tonic-gate "Reserved", /* trap id 15 */ 1317c478bd9Sstevel@tonic-gate "x87 floating point error", /* trap id 16 */ 1327c478bd9Sstevel@tonic-gate "Alignment check", /* trap id 17 */ 1337c478bd9Sstevel@tonic-gate "Machine check", /* trap id 18 */ 1347c478bd9Sstevel@tonic-gate "SIMD floating point exception", /* trap id 19 */ 1357c478bd9Sstevel@tonic-gate }; 1367c478bd9Sstevel@tonic-gate 1377c478bd9Sstevel@tonic-gate #define TRAP_TYPES (sizeof (trap_type) / sizeof (trap_type[0])) 1387c478bd9Sstevel@tonic-gate 139ddece0baSsethg #define SLOW_SCALL_SIZE 2 140ddece0baSsethg #define FAST_SCALL_SIZE 2 141ddece0baSsethg 1427c478bd9Sstevel@tonic-gate int tudebug = 0; 1437c478bd9Sstevel@tonic-gate int tudebugbpt = 0; 1447c478bd9Sstevel@tonic-gate int tudebugfpe = 0; 1457c478bd9Sstevel@tonic-gate int tudebugsse = 0; 1467c478bd9Sstevel@tonic-gate 1477c478bd9Sstevel@tonic-gate #if defined(TRAPDEBUG) || defined(lint) 1487c478bd9Sstevel@tonic-gate int tdebug = 0; 1497c478bd9Sstevel@tonic-gate int lodebug = 0; 1507c478bd9Sstevel@tonic-gate int faultdebug = 0; 1517c478bd9Sstevel@tonic-gate #else 1527c478bd9Sstevel@tonic-gate #define tdebug 0 1537c478bd9Sstevel@tonic-gate #define lodebug 0 1547c478bd9Sstevel@tonic-gate #define faultdebug 0 1557c478bd9Sstevel@tonic-gate #endif /* defined(TRAPDEBUG) || defined(lint) */ 1567c478bd9Sstevel@tonic-gate 1577c478bd9Sstevel@tonic-gate #if defined(TRAPTRACE) 158*a563a037Sbholler /* 159*a563a037Sbholler * trap trace record for cpu0 is allocated here. 160*a563a037Sbholler * trap trace records for non-boot cpus are allocated in mp_startup_init(). 161*a563a037Sbholler */ 162*a563a037Sbholler static trap_trace_rec_t trap_tr0[TRAPTR_NENT]; 163*a563a037Sbholler trap_trace_ctl_t trap_trace_ctl[NCPU] = { 164*a563a037Sbholler { 165*a563a037Sbholler (uintptr_t)trap_tr0, /* next record */ 166*a563a037Sbholler (uintptr_t)trap_tr0, /* first record */ 167*a563a037Sbholler (uintptr_t)(trap_tr0 + TRAPTR_NENT), /* limit */ 168*a563a037Sbholler (uintptr_t)0 /* current */ 169*a563a037Sbholler }, 170*a563a037Sbholler }; 171*a563a037Sbholler 172*a563a037Sbholler /* 173*a563a037Sbholler * default trap buffer size 174*a563a037Sbholler */ 175*a563a037Sbholler size_t trap_trace_bufsize = TRAPTR_NENT * sizeof (trap_trace_rec_t); 176*a563a037Sbholler int trap_trace_freeze = 0; 177*a563a037Sbholler int trap_trace_off = 0; 178*a563a037Sbholler 179*a563a037Sbholler /* 180*a563a037Sbholler * A dummy TRAPTRACE entry to use after death. 181*a563a037Sbholler */ 182*a563a037Sbholler trap_trace_rec_t trap_trace_postmort; 183*a563a037Sbholler 1847c478bd9Sstevel@tonic-gate static void dump_ttrace(void); 1857c478bd9Sstevel@tonic-gate #endif /* TRAPTRACE */ 1867c478bd9Sstevel@tonic-gate static void dumpregs(struct regs *); 1877c478bd9Sstevel@tonic-gate static void showregs(uint_t, struct regs *, caddr_t); 1887c478bd9Sstevel@tonic-gate static int kern_gpfault(struct regs *); 1897c478bd9Sstevel@tonic-gate 1907c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 1917c478bd9Sstevel@tonic-gate static int 1927c478bd9Sstevel@tonic-gate die(uint_t type, struct regs *rp, caddr_t addr, processorid_t cpuid) 1937c478bd9Sstevel@tonic-gate { 194843e1988Sjohnlev struct panic_trap_info ti; 1957c478bd9Sstevel@tonic-gate const char *trap_name, *trap_mnemonic; 1967c478bd9Sstevel@tonic-gate 1977c478bd9Sstevel@tonic-gate if (type < TRAP_TYPES) { 1987c478bd9Sstevel@tonic-gate trap_name = trap_type[type]; 1997c478bd9Sstevel@tonic-gate trap_mnemonic = trap_type_mnemonic[type]; 2007c478bd9Sstevel@tonic-gate } else { 2017c478bd9Sstevel@tonic-gate trap_name = "trap"; 2027c478bd9Sstevel@tonic-gate trap_mnemonic = "-"; 2037c478bd9Sstevel@tonic-gate } 2047c478bd9Sstevel@tonic-gate 2057c478bd9Sstevel@tonic-gate #ifdef TRAPTRACE 2067c478bd9Sstevel@tonic-gate TRAPTRACE_FREEZE; 2077c478bd9Sstevel@tonic-gate #endif 2087c478bd9Sstevel@tonic-gate 2097c478bd9Sstevel@tonic-gate ti.trap_regs = rp; 2107c478bd9Sstevel@tonic-gate ti.trap_type = type & ~USER; 2117c478bd9Sstevel@tonic-gate ti.trap_addr = addr; 2127c478bd9Sstevel@tonic-gate 2137c478bd9Sstevel@tonic-gate curthread->t_panic_trap = &ti; 2147c478bd9Sstevel@tonic-gate 2157c478bd9Sstevel@tonic-gate if (type == T_PGFLT && addr < (caddr_t)KERNELBASE) { 2167c478bd9Sstevel@tonic-gate panic("BAD TRAP: type=%x (#%s %s) rp=%p addr=%p " 2177c478bd9Sstevel@tonic-gate "occurred in module \"%s\" due to %s", 2187c478bd9Sstevel@tonic-gate type, trap_mnemonic, trap_name, (void *)rp, (void *)addr, 2197c478bd9Sstevel@tonic-gate mod_containing_pc((caddr_t)rp->r_pc), 2207c478bd9Sstevel@tonic-gate addr < (caddr_t)PAGESIZE ? 2217c478bd9Sstevel@tonic-gate "a NULL pointer dereference" : 2227c478bd9Sstevel@tonic-gate "an illegal access to a user address"); 2237c478bd9Sstevel@tonic-gate } else 2247c478bd9Sstevel@tonic-gate panic("BAD TRAP: type=%x (#%s %s) rp=%p addr=%p", 2257c478bd9Sstevel@tonic-gate type, trap_mnemonic, trap_name, (void *)rp, (void *)addr); 2267c478bd9Sstevel@tonic-gate return (0); 2277c478bd9Sstevel@tonic-gate } 2287c478bd9Sstevel@tonic-gate 2297c478bd9Sstevel@tonic-gate /* 2307c478bd9Sstevel@tonic-gate * Rewrite the instruction at pc to be an int $T_SYSCALLINT instruction. 2317c478bd9Sstevel@tonic-gate * 2327c478bd9Sstevel@tonic-gate * int <vector> is two bytes: 0xCD <vector> 2337c478bd9Sstevel@tonic-gate */ 2347c478bd9Sstevel@tonic-gate 2357c478bd9Sstevel@tonic-gate static int 2367c478bd9Sstevel@tonic-gate rewrite_syscall(caddr_t pc) 2377c478bd9Sstevel@tonic-gate { 2387c478bd9Sstevel@tonic-gate uchar_t instr[SLOW_SCALL_SIZE] = { 0xCD, T_SYSCALLINT }; 2397c478bd9Sstevel@tonic-gate 2407c478bd9Sstevel@tonic-gate if (uwrite(curthread->t_procp, instr, SLOW_SCALL_SIZE, 2417c478bd9Sstevel@tonic-gate (uintptr_t)pc) != 0) 2427c478bd9Sstevel@tonic-gate return (1); 2437c478bd9Sstevel@tonic-gate 2447c478bd9Sstevel@tonic-gate return (0); 2457c478bd9Sstevel@tonic-gate } 2467c478bd9Sstevel@tonic-gate 2477c478bd9Sstevel@tonic-gate /* 2487c478bd9Sstevel@tonic-gate * Test to see if the instruction at pc is sysenter or syscall. The second 2497c478bd9Sstevel@tonic-gate * argument should be the x86 feature flag corresponding to the expected 2507c478bd9Sstevel@tonic-gate * instruction. 2517c478bd9Sstevel@tonic-gate * 2527c478bd9Sstevel@tonic-gate * sysenter is two bytes: 0x0F 0x34 2537c478bd9Sstevel@tonic-gate * syscall is two bytes: 0x0F 0x05 254ddece0baSsethg * int $T_SYSCALLINT is two bytes: 0xCD 0x91 2557c478bd9Sstevel@tonic-gate */ 2567c478bd9Sstevel@tonic-gate 2577c478bd9Sstevel@tonic-gate static int 258ddece0baSsethg instr_is_other_syscall(caddr_t pc, int which) 2597c478bd9Sstevel@tonic-gate { 2607c478bd9Sstevel@tonic-gate uchar_t instr[FAST_SCALL_SIZE]; 2617c478bd9Sstevel@tonic-gate 262ddece0baSsethg ASSERT(which == X86_SEP || which == X86_ASYSC || which == 0xCD); 2637c478bd9Sstevel@tonic-gate 264ddece0baSsethg if (copyin_nowatch(pc, (caddr_t)instr, FAST_SCALL_SIZE) != 0) 2657c478bd9Sstevel@tonic-gate return (0); 2667c478bd9Sstevel@tonic-gate 267ddece0baSsethg switch (which) { 268ddece0baSsethg case X86_SEP: 269ddece0baSsethg if (instr[0] == 0x0F && instr[1] == 0x34) 2707c478bd9Sstevel@tonic-gate return (1); 271ddece0baSsethg break; 272ddece0baSsethg case X86_ASYSC: 273ddece0baSsethg if (instr[0] == 0x0F && instr[1] == 0x05) 274ddece0baSsethg return (1); 275ddece0baSsethg break; 276ddece0baSsethg case 0xCD: 277ddece0baSsethg if (instr[0] == 0xCD && instr[1] == T_SYSCALLINT) 278ddece0baSsethg return (1); 279ddece0baSsethg break; 280ddece0baSsethg } 2817c478bd9Sstevel@tonic-gate 2827c478bd9Sstevel@tonic-gate return (0); 2837c478bd9Sstevel@tonic-gate } 2847c478bd9Sstevel@tonic-gate 285ddece0baSsethg static const char * 286ddece0baSsethg syscall_insn_string(int syscall_insn) 287ddece0baSsethg { 288ddece0baSsethg switch (syscall_insn) { 289ddece0baSsethg case X86_SEP: 290ddece0baSsethg return ("sysenter"); 291ddece0baSsethg case X86_ASYSC: 292ddece0baSsethg return ("syscall"); 293ddece0baSsethg case 0xCD: 294ddece0baSsethg return ("int"); 295ddece0baSsethg default: 296ddece0baSsethg return ("Unknown"); 297ddece0baSsethg } 298ddece0baSsethg } 299ddece0baSsethg 300ddece0baSsethg static int 301ddece0baSsethg ldt_rewrite_syscall(struct regs *rp, proc_t *p, int syscall_insn) 302ddece0baSsethg { 303ddece0baSsethg caddr_t linearpc; 304ddece0baSsethg int return_code = 0; 305ddece0baSsethg 306ddece0baSsethg mutex_enter(&p->p_ldtlock); /* Must be held across linear_pc() */ 307ddece0baSsethg 308ddece0baSsethg if (linear_pc(rp, p, &linearpc) == 0) { 309ddece0baSsethg 310ddece0baSsethg /* 311ddece0baSsethg * If another thread beat us here, it already changed 312ddece0baSsethg * this site to the slower (int) syscall instruction. 313ddece0baSsethg */ 314ddece0baSsethg if (instr_is_other_syscall(linearpc, 0xCD)) { 315ddece0baSsethg return_code = 1; 316ddece0baSsethg } else if (instr_is_other_syscall(linearpc, syscall_insn)) { 317ddece0baSsethg 318ddece0baSsethg if (rewrite_syscall(linearpc) == 0) { 319ddece0baSsethg return_code = 1; 320ddece0baSsethg } 321ddece0baSsethg #ifdef DEBUG 322ddece0baSsethg else 323ddece0baSsethg cmn_err(CE_WARN, "failed to rewrite %s " 324ddece0baSsethg "instruction in process %d", 325ddece0baSsethg syscall_insn_string(syscall_insn), 326ddece0baSsethg p->p_pid); 327ddece0baSsethg #endif /* DEBUG */ 328ddece0baSsethg } 329ddece0baSsethg } 330ddece0baSsethg 331ddece0baSsethg mutex_exit(&p->p_ldtlock); /* Must be held across linear_pc() */ 332ddece0baSsethg 333ddece0baSsethg return (return_code); 334ddece0baSsethg } 335ddece0baSsethg 3367c478bd9Sstevel@tonic-gate /* 3377c478bd9Sstevel@tonic-gate * Test to see if the instruction at pc is a system call instruction. 3387c478bd9Sstevel@tonic-gate * 3397c478bd9Sstevel@tonic-gate * The bytes of an lcall instruction used for the syscall trap. 3407c478bd9Sstevel@tonic-gate * static uchar_t lcall[7] = { 0x9a, 0, 0, 0, 0, 0x7, 0 }; 3417c478bd9Sstevel@tonic-gate * static uchar_t lcallalt[7] = { 0x9a, 0, 0, 0, 0, 0x27, 0 }; 3427c478bd9Sstevel@tonic-gate */ 3437c478bd9Sstevel@tonic-gate 3447c478bd9Sstevel@tonic-gate #define LCALLSIZE 7 3457c478bd9Sstevel@tonic-gate 3467c478bd9Sstevel@tonic-gate static int 347ddece0baSsethg instr_is_lcall_syscall(caddr_t pc) 3487c478bd9Sstevel@tonic-gate { 3497c478bd9Sstevel@tonic-gate uchar_t instr[LCALLSIZE]; 3507c478bd9Sstevel@tonic-gate 3517c478bd9Sstevel@tonic-gate if (copyin_nowatch(pc, (caddr_t)instr, LCALLSIZE) == 0 && 3527c478bd9Sstevel@tonic-gate instr[0] == 0x9a && 3537c478bd9Sstevel@tonic-gate instr[1] == 0 && 3547c478bd9Sstevel@tonic-gate instr[2] == 0 && 3557c478bd9Sstevel@tonic-gate instr[3] == 0 && 3567c478bd9Sstevel@tonic-gate instr[4] == 0 && 3577c478bd9Sstevel@tonic-gate (instr[5] == 0x7 || instr[5] == 0x27) && 3587c478bd9Sstevel@tonic-gate instr[6] == 0) 3597c478bd9Sstevel@tonic-gate return (1); 3607c478bd9Sstevel@tonic-gate 3617c478bd9Sstevel@tonic-gate return (0); 3627c478bd9Sstevel@tonic-gate } 3637c478bd9Sstevel@tonic-gate 364130a12b8Sfvdl #ifdef __amd64 365130a12b8Sfvdl 366130a12b8Sfvdl /* 367ae115bc7Smrj * In the first revisions of amd64 CPUs produced by AMD, the LAHF and 368ae115bc7Smrj * SAHF instructions were not implemented in 64-bit mode. Later revisions 369130a12b8Sfvdl * did implement these instructions. An extension to the cpuid instruction 370130a12b8Sfvdl * was added to check for the capability of executing these instructions 371ae115bc7Smrj * in 64-bit mode. 372130a12b8Sfvdl * 373130a12b8Sfvdl * Intel originally did not implement these instructions in EM64T either, 374130a12b8Sfvdl * but added them in later revisions. 375130a12b8Sfvdl * 376130a12b8Sfvdl * So, there are different chip revisions by both vendors out there that 377130a12b8Sfvdl * may or may not implement these instructions. The easy solution is to 378130a12b8Sfvdl * just always emulate these instructions on demand. 379130a12b8Sfvdl * 380130a12b8Sfvdl * SAHF == store %ah in the lower 8 bits of %rflags (opcode 0x9e) 381130a12b8Sfvdl * LAHF == load the lower 8 bits of %rflags into %ah (opcode 0x9f) 382130a12b8Sfvdl */ 383130a12b8Sfvdl 384130a12b8Sfvdl #define LSAHFSIZE 1 385130a12b8Sfvdl 386130a12b8Sfvdl static int 387130a12b8Sfvdl instr_is_lsahf(caddr_t pc, uchar_t *instr) 388130a12b8Sfvdl { 389130a12b8Sfvdl if (copyin_nowatch(pc, (caddr_t)instr, LSAHFSIZE) == 0 && 390130a12b8Sfvdl (*instr == 0x9e || *instr == 0x9f)) 391130a12b8Sfvdl return (1); 392130a12b8Sfvdl return (0); 393130a12b8Sfvdl } 394130a12b8Sfvdl 395130a12b8Sfvdl /* 396130a12b8Sfvdl * Emulate the LAHF and SAHF instructions. The reference manuals define 397130a12b8Sfvdl * these instructions to always load/store bit 1 as a 1, and bits 3 and 5 398130a12b8Sfvdl * as a 0. The other, defined, bits are copied (the PS_ICC bits and PS_P). 399130a12b8Sfvdl * 400130a12b8Sfvdl * Note that %ah is bits 8-15 of %rax. 401130a12b8Sfvdl */ 402130a12b8Sfvdl static void 403130a12b8Sfvdl emulate_lsahf(struct regs *rp, uchar_t instr) 404130a12b8Sfvdl { 405130a12b8Sfvdl if (instr == 0x9e) { 406130a12b8Sfvdl /* sahf. Copy bits from %ah to flags. */ 407130a12b8Sfvdl rp->r_ps = (rp->r_ps & ~0xff) | 408130a12b8Sfvdl ((rp->r_rax >> 8) & PSL_LSAHFMASK) | PS_MB1; 409130a12b8Sfvdl } else { 410130a12b8Sfvdl /* lahf. Copy bits from flags to %ah. */ 411130a12b8Sfvdl rp->r_rax = (rp->r_rax & ~0xff00) | 412130a12b8Sfvdl (((rp->r_ps & PSL_LSAHFMASK) | PS_MB1) << 8); 413130a12b8Sfvdl } 414130a12b8Sfvdl rp->r_pc += LSAHFSIZE; 415130a12b8Sfvdl } 416130a12b8Sfvdl #endif /* __amd64 */ 417130a12b8Sfvdl 4187c478bd9Sstevel@tonic-gate #ifdef OPTERON_ERRATUM_91 4197c478bd9Sstevel@tonic-gate 4207c478bd9Sstevel@tonic-gate /* 4217c478bd9Sstevel@tonic-gate * Test to see if the instruction at pc is a prefetch instruction. 4227c478bd9Sstevel@tonic-gate * 4237c478bd9Sstevel@tonic-gate * The first byte of prefetch instructions is always 0x0F. 4247c478bd9Sstevel@tonic-gate * The second byte is 0x18 for regular prefetch or 0x0D for AMD 3dnow prefetch. 4257c478bd9Sstevel@tonic-gate * The third byte is between 0 and 3 inclusive. 4267c478bd9Sstevel@tonic-gate */ 4277c478bd9Sstevel@tonic-gate 4287c478bd9Sstevel@tonic-gate #define PREFETCHSIZE 3 4297c478bd9Sstevel@tonic-gate 4307c478bd9Sstevel@tonic-gate static int 4317c478bd9Sstevel@tonic-gate cmp_to_prefetch(uchar_t *p) 4327c478bd9Sstevel@tonic-gate { 4337c478bd9Sstevel@tonic-gate if (*p == 0x0F && (*(p+1) == 0x18 || *(p+1) == 0x0D) && *(p+2) <= 3) 4347c478bd9Sstevel@tonic-gate return (1); 4357c478bd9Sstevel@tonic-gate return (0); 4367c478bd9Sstevel@tonic-gate } 4377c478bd9Sstevel@tonic-gate 4387c478bd9Sstevel@tonic-gate static int 4397c478bd9Sstevel@tonic-gate instr_is_prefetch(caddr_t pc) 4407c478bd9Sstevel@tonic-gate { 4417c478bd9Sstevel@tonic-gate uchar_t instr[PREFETCHSIZE]; 4427c478bd9Sstevel@tonic-gate int error; 4437c478bd9Sstevel@tonic-gate 4447c478bd9Sstevel@tonic-gate error = copyin_nowatch(pc, (caddr_t)instr, PREFETCHSIZE); 4457c478bd9Sstevel@tonic-gate 4467c478bd9Sstevel@tonic-gate if (error == 0 && cmp_to_prefetch(instr)) 4477c478bd9Sstevel@tonic-gate return (1); 4487c478bd9Sstevel@tonic-gate return (0); 4497c478bd9Sstevel@tonic-gate } 4507c478bd9Sstevel@tonic-gate 4517c478bd9Sstevel@tonic-gate #endif /* OPTERON_ERRATUM_91 */ 4527c478bd9Sstevel@tonic-gate 4537c478bd9Sstevel@tonic-gate /* 4547c478bd9Sstevel@tonic-gate * Called from the trap handler when a processor trap occurs. 4557c478bd9Sstevel@tonic-gate * 4567c478bd9Sstevel@tonic-gate * Note: All user-level traps that might call stop() must exit 4577c478bd9Sstevel@tonic-gate * trap() by 'goto out' or by falling through. 458ae115bc7Smrj * Note Also: trap() is usually called with interrupts enabled, (PS_IE == 1) 459ae115bc7Smrj * however, there are paths that arrive here with PS_IE == 0 so special care 460ae115bc7Smrj * must be taken in those cases. 4617c478bd9Sstevel@tonic-gate */ 4627c478bd9Sstevel@tonic-gate void 4637c478bd9Sstevel@tonic-gate trap(struct regs *rp, caddr_t addr, processorid_t cpuid) 4647c478bd9Sstevel@tonic-gate { 465ae115bc7Smrj kthread_t *ct = curthread; 4667c478bd9Sstevel@tonic-gate enum seg_rw rw; 4677c478bd9Sstevel@tonic-gate unsigned type; 468ae115bc7Smrj proc_t *p = ttoproc(ct); 469ae115bc7Smrj klwp_t *lwp = ttolwp(ct); 4707c478bd9Sstevel@tonic-gate uintptr_t lofault; 4717c478bd9Sstevel@tonic-gate faultcode_t pagefault(), res, errcode; 4727c478bd9Sstevel@tonic-gate enum fault_type fault_type; 4737c478bd9Sstevel@tonic-gate k_siginfo_t siginfo; 4747c478bd9Sstevel@tonic-gate uint_t fault = 0; 4757c478bd9Sstevel@tonic-gate int mstate; 4767c478bd9Sstevel@tonic-gate int sicode = 0; 4777c478bd9Sstevel@tonic-gate int watchcode; 4787c478bd9Sstevel@tonic-gate int watchpage; 4797c478bd9Sstevel@tonic-gate caddr_t vaddr; 4809acbbeafSnn35248 int singlestep_twiddle; 4817c478bd9Sstevel@tonic-gate size_t sz; 4827c478bd9Sstevel@tonic-gate int ta; 483130a12b8Sfvdl #ifdef __amd64 484130a12b8Sfvdl uchar_t instr; 485130a12b8Sfvdl #endif 4867c478bd9Sstevel@tonic-gate 4877c478bd9Sstevel@tonic-gate ASSERT_STACK_ALIGNED(); 4887c478bd9Sstevel@tonic-gate 4897c478bd9Sstevel@tonic-gate type = rp->r_trapno; 4907c478bd9Sstevel@tonic-gate CPU_STATS_ADDQ(CPU, sys, trap, 1); 491ae115bc7Smrj ASSERT(ct->t_schedflag & TS_DONT_SWAP); 4927c478bd9Sstevel@tonic-gate 4937c478bd9Sstevel@tonic-gate if (type == T_PGFLT) { 4947c478bd9Sstevel@tonic-gate 4957c478bd9Sstevel@tonic-gate errcode = rp->r_err; 4967c478bd9Sstevel@tonic-gate if (errcode & PF_ERR_WRITE) 4977c478bd9Sstevel@tonic-gate rw = S_WRITE; 4987c478bd9Sstevel@tonic-gate else if ((caddr_t)rp->r_pc == addr || 4997c478bd9Sstevel@tonic-gate (mmu.pt_nx != 0 && (errcode & PF_ERR_EXEC))) 5007c478bd9Sstevel@tonic-gate rw = S_EXEC; 5017c478bd9Sstevel@tonic-gate else 5027c478bd9Sstevel@tonic-gate rw = S_READ; 5037c478bd9Sstevel@tonic-gate 5047c478bd9Sstevel@tonic-gate #if defined(__i386) 5057c478bd9Sstevel@tonic-gate /* 5067c478bd9Sstevel@tonic-gate * Pentium Pro work-around 5077c478bd9Sstevel@tonic-gate */ 5087c478bd9Sstevel@tonic-gate if ((errcode & PF_ERR_PROT) && pentiumpro_bug4046376) { 5097c478bd9Sstevel@tonic-gate uint_t attr; 5107c478bd9Sstevel@tonic-gate uint_t priv_violation; 5117c478bd9Sstevel@tonic-gate uint_t access_violation; 5127c478bd9Sstevel@tonic-gate 5137c478bd9Sstevel@tonic-gate if (hat_getattr(addr < (caddr_t)kernelbase ? 5147c478bd9Sstevel@tonic-gate curproc->p_as->a_hat : kas.a_hat, addr, &attr) 5157c478bd9Sstevel@tonic-gate == -1) { 5167c478bd9Sstevel@tonic-gate errcode &= ~PF_ERR_PROT; 5177c478bd9Sstevel@tonic-gate } else { 5187c478bd9Sstevel@tonic-gate priv_violation = (errcode & PF_ERR_USER) && 5197c478bd9Sstevel@tonic-gate !(attr & PROT_USER); 5207c478bd9Sstevel@tonic-gate access_violation = (errcode & PF_ERR_WRITE) && 5217c478bd9Sstevel@tonic-gate !(attr & PROT_WRITE); 5227c478bd9Sstevel@tonic-gate if (!priv_violation && !access_violation) 5237c478bd9Sstevel@tonic-gate goto cleanup; 5247c478bd9Sstevel@tonic-gate } 5257c478bd9Sstevel@tonic-gate } 5267c478bd9Sstevel@tonic-gate #endif /* __i386 */ 5277c478bd9Sstevel@tonic-gate 528ae115bc7Smrj } else if (type == T_SGLSTP && lwp != NULL) 529ae115bc7Smrj lwp->lwp_pcb.pcb_drstat = (uintptr_t)addr; 5307c478bd9Sstevel@tonic-gate 5317c478bd9Sstevel@tonic-gate if (tdebug) 5327c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 5337c478bd9Sstevel@tonic-gate 5347c478bd9Sstevel@tonic-gate if (USERMODE(rp->r_cs)) { 5357c478bd9Sstevel@tonic-gate /* 5367c478bd9Sstevel@tonic-gate * Set up the current cred to use during this trap. u_cred 5377c478bd9Sstevel@tonic-gate * no longer exists. t_cred is used instead. 5387c478bd9Sstevel@tonic-gate * The current process credential applies to the thread for 5397c478bd9Sstevel@tonic-gate * the entire trap. If trapping from the kernel, this 5407c478bd9Sstevel@tonic-gate * should already be set up. 5417c478bd9Sstevel@tonic-gate */ 542ae115bc7Smrj if (ct->t_cred != p->p_cred) { 543ae115bc7Smrj cred_t *oldcred = ct->t_cred; 5447c478bd9Sstevel@tonic-gate /* 5457c478bd9Sstevel@tonic-gate * DTrace accesses t_cred in probe context. t_cred 5467c478bd9Sstevel@tonic-gate * must always be either NULL, or point to a valid, 5477c478bd9Sstevel@tonic-gate * allocated cred structure. 5487c478bd9Sstevel@tonic-gate */ 549ae115bc7Smrj ct->t_cred = crgetcred(); 5507c478bd9Sstevel@tonic-gate crfree(oldcred); 5517c478bd9Sstevel@tonic-gate } 5527c478bd9Sstevel@tonic-gate ASSERT(lwp != NULL); 5537c478bd9Sstevel@tonic-gate type |= USER; 5547c478bd9Sstevel@tonic-gate ASSERT(lwptoregs(lwp) == rp); 5557c478bd9Sstevel@tonic-gate lwp->lwp_state = LWP_SYS; 5567c478bd9Sstevel@tonic-gate 5577c478bd9Sstevel@tonic-gate switch (type) { 5587c478bd9Sstevel@tonic-gate case T_PGFLT + USER: 5597c478bd9Sstevel@tonic-gate if ((caddr_t)rp->r_pc == addr) 5607c478bd9Sstevel@tonic-gate mstate = LMS_TFAULT; 5617c478bd9Sstevel@tonic-gate else 5627c478bd9Sstevel@tonic-gate mstate = LMS_DFAULT; 5637c478bd9Sstevel@tonic-gate break; 5647c478bd9Sstevel@tonic-gate default: 5657c478bd9Sstevel@tonic-gate mstate = LMS_TRAP; 5667c478bd9Sstevel@tonic-gate break; 5677c478bd9Sstevel@tonic-gate } 5687c478bd9Sstevel@tonic-gate /* Kernel probe */ 5697c478bd9Sstevel@tonic-gate TNF_PROBE_1(thread_state, "thread", /* CSTYLED */, 5707c478bd9Sstevel@tonic-gate tnf_microstate, state, mstate); 571ae115bc7Smrj mstate = new_mstate(ct, mstate); 5727c478bd9Sstevel@tonic-gate 5737c478bd9Sstevel@tonic-gate bzero(&siginfo, sizeof (siginfo)); 5747c478bd9Sstevel@tonic-gate } 5757c478bd9Sstevel@tonic-gate 5767c478bd9Sstevel@tonic-gate switch (type) { 5777c478bd9Sstevel@tonic-gate case T_PGFLT + USER: 5787c478bd9Sstevel@tonic-gate case T_SGLSTP: 5797c478bd9Sstevel@tonic-gate case T_SGLSTP + USER: 5807c478bd9Sstevel@tonic-gate case T_BPTFLT + USER: 5817c478bd9Sstevel@tonic-gate break; 5827c478bd9Sstevel@tonic-gate 5837c478bd9Sstevel@tonic-gate default: 5847c478bd9Sstevel@tonic-gate FTRACE_2("trap(): type=0x%lx, regs=0x%lx", 5857c478bd9Sstevel@tonic-gate (ulong_t)type, (ulong_t)rp); 5867c478bd9Sstevel@tonic-gate break; 5877c478bd9Sstevel@tonic-gate } 5887c478bd9Sstevel@tonic-gate 5897c478bd9Sstevel@tonic-gate switch (type) { 590eae0da43Ssethg case T_SIMDFPE: 591eae0da43Ssethg /* Make sure we enable interrupts before die()ing */ 592eae0da43Ssethg sti(); /* The SIMD exception comes in via cmninttrap */ 593eae0da43Ssethg /*FALLTHROUGH*/ 5947c478bd9Sstevel@tonic-gate default: 5957c478bd9Sstevel@tonic-gate if (type & USER) { 5967c478bd9Sstevel@tonic-gate if (tudebug) 5977c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 5987c478bd9Sstevel@tonic-gate printf("trap: Unknown trap type %d in user mode\n", 5997c478bd9Sstevel@tonic-gate type & ~USER); 6007c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGILL; 6017c478bd9Sstevel@tonic-gate siginfo.si_code = ILL_ILLTRP; 6027c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 6037c478bd9Sstevel@tonic-gate siginfo.si_trapno = type & ~USER; 6047c478bd9Sstevel@tonic-gate fault = FLTILL; 6057c478bd9Sstevel@tonic-gate break; 6067c478bd9Sstevel@tonic-gate } else { 6077c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 6087c478bd9Sstevel@tonic-gate /*NOTREACHED*/ 6097c478bd9Sstevel@tonic-gate } 6107c478bd9Sstevel@tonic-gate 6117c478bd9Sstevel@tonic-gate case T_PGFLT: /* system page fault */ 6127c478bd9Sstevel@tonic-gate /* 6137c478bd9Sstevel@tonic-gate * If we're under on_trap() protection (see <sys/ontrap.h>), 61420c794b3Sgavinm * set ot_trap and bounce back to the on_trap() call site 61520c794b3Sgavinm * via the installed trampoline. 6167c478bd9Sstevel@tonic-gate */ 617ae115bc7Smrj if ((ct->t_ontrap != NULL) && 618ae115bc7Smrj (ct->t_ontrap->ot_prot & OT_DATA_ACCESS)) { 619ae115bc7Smrj ct->t_ontrap->ot_trap |= OT_DATA_ACCESS; 62020c794b3Sgavinm rp->r_pc = ct->t_ontrap->ot_trampoline; 62120c794b3Sgavinm goto cleanup; 6227c478bd9Sstevel@tonic-gate } 6237c478bd9Sstevel@tonic-gate 6247c478bd9Sstevel@tonic-gate /* 6257c478bd9Sstevel@tonic-gate * See if we can handle as pagefault. Save lofault 6267c478bd9Sstevel@tonic-gate * across this. Here we assume that an address 6277c478bd9Sstevel@tonic-gate * less than KERNELBASE is a user fault. 6287c478bd9Sstevel@tonic-gate * We can do this as copy.s routines verify that the 6297c478bd9Sstevel@tonic-gate * starting address is less than KERNELBASE before 6307c478bd9Sstevel@tonic-gate * starting and because we know that we always have 6317c478bd9Sstevel@tonic-gate * KERNELBASE mapped as invalid to serve as a "barrier". 6327c478bd9Sstevel@tonic-gate */ 633ae115bc7Smrj lofault = ct->t_lofault; 634ae115bc7Smrj ct->t_lofault = 0; 6357c478bd9Sstevel@tonic-gate 636ae115bc7Smrj mstate = new_mstate(ct, LMS_KFAULT); 6377c478bd9Sstevel@tonic-gate 6387c478bd9Sstevel@tonic-gate if (addr < (caddr_t)kernelbase) { 6397c478bd9Sstevel@tonic-gate res = pagefault(addr, 6407c478bd9Sstevel@tonic-gate (errcode & PF_ERR_PROT)? F_PROT: F_INVAL, rw, 0); 6417c478bd9Sstevel@tonic-gate if (res == FC_NOMAP && 6427c478bd9Sstevel@tonic-gate addr < p->p_usrstack && 6437c478bd9Sstevel@tonic-gate grow(addr)) 6447c478bd9Sstevel@tonic-gate res = 0; 6457c478bd9Sstevel@tonic-gate } else { 6467c478bd9Sstevel@tonic-gate res = pagefault(addr, 6477c478bd9Sstevel@tonic-gate (errcode & PF_ERR_PROT)? F_PROT: F_INVAL, rw, 1); 6487c478bd9Sstevel@tonic-gate } 649ae115bc7Smrj (void) new_mstate(ct, mstate); 6507c478bd9Sstevel@tonic-gate 6517c478bd9Sstevel@tonic-gate /* 6527c478bd9Sstevel@tonic-gate * Restore lofault. If we resolved the fault, exit. 6537c478bd9Sstevel@tonic-gate * If we didn't and lofault wasn't set, die. 6547c478bd9Sstevel@tonic-gate */ 655ae115bc7Smrj ct->t_lofault = lofault; 6567c478bd9Sstevel@tonic-gate if (res == 0) 6577c478bd9Sstevel@tonic-gate goto cleanup; 6587c478bd9Sstevel@tonic-gate 6597c478bd9Sstevel@tonic-gate #if defined(OPTERON_ERRATUM_93) && defined(_LP64) 6607c478bd9Sstevel@tonic-gate if (lofault == 0 && opteron_erratum_93) { 6617c478bd9Sstevel@tonic-gate /* 6627c478bd9Sstevel@tonic-gate * Workaround for Opteron Erratum 93. On return from 6637c478bd9Sstevel@tonic-gate * a System Managment Interrupt at a HLT instruction 6647c478bd9Sstevel@tonic-gate * the %rip might be truncated to a 32 bit value. 6657c478bd9Sstevel@tonic-gate * BIOS is supposed to fix this, but some don't. 6667c478bd9Sstevel@tonic-gate * If this occurs we simply restore the high order bits. 6677c478bd9Sstevel@tonic-gate * The HLT instruction is 1 byte of 0xf4. 6687c478bd9Sstevel@tonic-gate */ 6697c478bd9Sstevel@tonic-gate uintptr_t rip = rp->r_pc; 6707c478bd9Sstevel@tonic-gate 6717c478bd9Sstevel@tonic-gate if ((rip & 0xfffffffful) == rip) { 6727c478bd9Sstevel@tonic-gate rip |= 0xfffffffful << 32; 6737c478bd9Sstevel@tonic-gate if (hat_getpfnum(kas.a_hat, (caddr_t)rip) != 6747c478bd9Sstevel@tonic-gate PFN_INVALID && 6757c478bd9Sstevel@tonic-gate (*(uchar_t *)rip == 0xf4 || 6767c478bd9Sstevel@tonic-gate *(uchar_t *)(rip - 1) == 0xf4)) { 6777c478bd9Sstevel@tonic-gate rp->r_pc = rip; 6787c478bd9Sstevel@tonic-gate goto cleanup; 6797c478bd9Sstevel@tonic-gate } 6807c478bd9Sstevel@tonic-gate } 6817c478bd9Sstevel@tonic-gate } 6827c478bd9Sstevel@tonic-gate #endif /* OPTERON_ERRATUM_93 && _LP64 */ 6837c478bd9Sstevel@tonic-gate 6847c478bd9Sstevel@tonic-gate #ifdef OPTERON_ERRATUM_91 6857c478bd9Sstevel@tonic-gate if (lofault == 0 && opteron_erratum_91) { 6867c478bd9Sstevel@tonic-gate /* 6877c478bd9Sstevel@tonic-gate * Workaround for Opteron Erratum 91. Prefetches may 6887c478bd9Sstevel@tonic-gate * generate a page fault (they're not supposed to do 6897c478bd9Sstevel@tonic-gate * that!). If this occurs we simply return back to the 6907c478bd9Sstevel@tonic-gate * instruction. 6917c478bd9Sstevel@tonic-gate */ 6927c478bd9Sstevel@tonic-gate caddr_t pc = (caddr_t)rp->r_pc; 6937c478bd9Sstevel@tonic-gate 6947c478bd9Sstevel@tonic-gate /* 6957c478bd9Sstevel@tonic-gate * If the faulting PC is not mapped, this is a 6967c478bd9Sstevel@tonic-gate * legitimate kernel page fault that must result in a 6977c478bd9Sstevel@tonic-gate * panic. If the faulting PC is mapped, it could contain 6987c478bd9Sstevel@tonic-gate * a prefetch instruction. Check for that here. 6997c478bd9Sstevel@tonic-gate */ 7007c478bd9Sstevel@tonic-gate if (hat_getpfnum(kas.a_hat, pc) != PFN_INVALID) { 7017c478bd9Sstevel@tonic-gate if (cmp_to_prefetch((uchar_t *)pc)) { 7027c478bd9Sstevel@tonic-gate #ifdef DEBUG 7037c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, "Opteron erratum 91 " 7047c478bd9Sstevel@tonic-gate "occurred: kernel prefetch" 7057c478bd9Sstevel@tonic-gate " at %p generated a page fault!", 7067c478bd9Sstevel@tonic-gate (void *)rp->r_pc); 7077c478bd9Sstevel@tonic-gate #endif /* DEBUG */ 7087c478bd9Sstevel@tonic-gate goto cleanup; 7097c478bd9Sstevel@tonic-gate } 7107c478bd9Sstevel@tonic-gate } 7117c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 7127c478bd9Sstevel@tonic-gate } 7137c478bd9Sstevel@tonic-gate #endif /* OPTERON_ERRATUM_91 */ 7147c478bd9Sstevel@tonic-gate 7157c478bd9Sstevel@tonic-gate if (lofault == 0) 7167c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 7177c478bd9Sstevel@tonic-gate 7187c478bd9Sstevel@tonic-gate /* 7197c478bd9Sstevel@tonic-gate * Cannot resolve fault. Return to lofault. 7207c478bd9Sstevel@tonic-gate */ 7217c478bd9Sstevel@tonic-gate if (lodebug) { 7227c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 7237c478bd9Sstevel@tonic-gate traceregs(rp); 7247c478bd9Sstevel@tonic-gate } 7257c478bd9Sstevel@tonic-gate if (FC_CODE(res) == FC_OBJERR) 7267c478bd9Sstevel@tonic-gate res = FC_ERRNO(res); 7277c478bd9Sstevel@tonic-gate else 7287c478bd9Sstevel@tonic-gate res = EFAULT; 7297c478bd9Sstevel@tonic-gate rp->r_r0 = res; 730ae115bc7Smrj rp->r_pc = ct->t_lofault; 7317c478bd9Sstevel@tonic-gate goto cleanup; 7327c478bd9Sstevel@tonic-gate 7337c478bd9Sstevel@tonic-gate case T_PGFLT + USER: /* user page fault */ 7347c478bd9Sstevel@tonic-gate if (faultdebug) { 7357c478bd9Sstevel@tonic-gate char *fault_str; 7367c478bd9Sstevel@tonic-gate 7377c478bd9Sstevel@tonic-gate switch (rw) { 7387c478bd9Sstevel@tonic-gate case S_READ: 7397c478bd9Sstevel@tonic-gate fault_str = "read"; 7407c478bd9Sstevel@tonic-gate break; 7417c478bd9Sstevel@tonic-gate case S_WRITE: 7427c478bd9Sstevel@tonic-gate fault_str = "write"; 7437c478bd9Sstevel@tonic-gate break; 7447c478bd9Sstevel@tonic-gate case S_EXEC: 7457c478bd9Sstevel@tonic-gate fault_str = "exec"; 7467c478bd9Sstevel@tonic-gate break; 7477c478bd9Sstevel@tonic-gate default: 7487c478bd9Sstevel@tonic-gate fault_str = ""; 7497c478bd9Sstevel@tonic-gate break; 7507c478bd9Sstevel@tonic-gate } 7517c478bd9Sstevel@tonic-gate printf("user %s fault: addr=0x%lx errcode=0x%x\n", 7527c478bd9Sstevel@tonic-gate fault_str, (uintptr_t)addr, errcode); 7537c478bd9Sstevel@tonic-gate } 7547c478bd9Sstevel@tonic-gate 7557c478bd9Sstevel@tonic-gate #if defined(OPTERON_ERRATUM_100) && defined(_LP64) 7567c478bd9Sstevel@tonic-gate /* 7577c478bd9Sstevel@tonic-gate * Workaround for AMD erratum 100 7587c478bd9Sstevel@tonic-gate * 7597c478bd9Sstevel@tonic-gate * A 32-bit process may receive a page fault on a non 7607c478bd9Sstevel@tonic-gate * 32-bit address by mistake. The range of the faulting 7617c478bd9Sstevel@tonic-gate * address will be 7627c478bd9Sstevel@tonic-gate * 7637c478bd9Sstevel@tonic-gate * 0xffffffff80000000 .. 0xffffffffffffffff or 7647c478bd9Sstevel@tonic-gate * 0x0000000100000000 .. 0x000000017fffffff 7657c478bd9Sstevel@tonic-gate * 7667c478bd9Sstevel@tonic-gate * The fault is always due to an instruction fetch, however 7677c478bd9Sstevel@tonic-gate * the value of r_pc should be correct (in 32 bit range), 7687c478bd9Sstevel@tonic-gate * so we ignore the page fault on the bogus address. 7697c478bd9Sstevel@tonic-gate */ 7707c478bd9Sstevel@tonic-gate if (p->p_model == DATAMODEL_ILP32 && 7717c478bd9Sstevel@tonic-gate (0xffffffff80000000 <= (uintptr_t)addr || 7727c478bd9Sstevel@tonic-gate (0x100000000 <= (uintptr_t)addr && 7737c478bd9Sstevel@tonic-gate (uintptr_t)addr <= 0x17fffffff))) { 7747c478bd9Sstevel@tonic-gate if (!opteron_erratum_100) 7757c478bd9Sstevel@tonic-gate panic("unexpected erratum #100"); 7767c478bd9Sstevel@tonic-gate if (rp->r_pc <= 0xffffffff) 7777c478bd9Sstevel@tonic-gate goto out; 7787c478bd9Sstevel@tonic-gate } 7797c478bd9Sstevel@tonic-gate #endif /* OPTERON_ERRATUM_100 && _LP64 */ 7807c478bd9Sstevel@tonic-gate 7817c478bd9Sstevel@tonic-gate ASSERT(!(curthread->t_flag & T_WATCHPT)); 7827c478bd9Sstevel@tonic-gate watchpage = (pr_watch_active(p) && pr_is_watchpage(addr, rw)); 7837c478bd9Sstevel@tonic-gate #ifdef __i386 7847c478bd9Sstevel@tonic-gate /* 7857c478bd9Sstevel@tonic-gate * In 32-bit mode, the lcall (system call) instruction fetches 7867c478bd9Sstevel@tonic-gate * one word from the stack, at the stack pointer, because of the 7877c478bd9Sstevel@tonic-gate * way the call gate is constructed. This is a bogus 7887c478bd9Sstevel@tonic-gate * read and should not be counted as a read watchpoint. 7897c478bd9Sstevel@tonic-gate * We work around the problem here by testing to see if 7907c478bd9Sstevel@tonic-gate * this situation applies and, if so, simply jumping to 7917c478bd9Sstevel@tonic-gate * the code in locore.s that fields the system call trap. 7927c478bd9Sstevel@tonic-gate * The registers on the stack are already set up properly 7937c478bd9Sstevel@tonic-gate * due to the match between the call gate sequence and the 7947c478bd9Sstevel@tonic-gate * trap gate sequence. We just have to adjust the pc. 7957c478bd9Sstevel@tonic-gate */ 7967c478bd9Sstevel@tonic-gate if (watchpage && addr == (caddr_t)rp->r_sp && 797ddece0baSsethg rw == S_READ && instr_is_lcall_syscall((caddr_t)rp->r_pc)) { 7987c478bd9Sstevel@tonic-gate extern void watch_syscall(void); 7997c478bd9Sstevel@tonic-gate 8007c478bd9Sstevel@tonic-gate rp->r_pc += LCALLSIZE; 8017c478bd9Sstevel@tonic-gate watch_syscall(); /* never returns */ 8027c478bd9Sstevel@tonic-gate /* NOTREACHED */ 8037c478bd9Sstevel@tonic-gate } 8047c478bd9Sstevel@tonic-gate #endif /* __i386 */ 8057c478bd9Sstevel@tonic-gate vaddr = addr; 8067c478bd9Sstevel@tonic-gate if (!watchpage || (sz = instr_size(rp, &vaddr, rw)) <= 0) 8077c478bd9Sstevel@tonic-gate fault_type = (errcode & PF_ERR_PROT)? F_PROT: F_INVAL; 8087c478bd9Sstevel@tonic-gate else if ((watchcode = pr_is_watchpoint(&vaddr, &ta, 8097c478bd9Sstevel@tonic-gate sz, NULL, rw)) != 0) { 8107c478bd9Sstevel@tonic-gate if (ta) { 8117c478bd9Sstevel@tonic-gate do_watch_step(vaddr, sz, rw, 8127c478bd9Sstevel@tonic-gate watchcode, rp->r_pc); 8137c478bd9Sstevel@tonic-gate fault_type = F_INVAL; 8147c478bd9Sstevel@tonic-gate } else { 8157c478bd9Sstevel@tonic-gate bzero(&siginfo, sizeof (siginfo)); 8167c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGTRAP; 8177c478bd9Sstevel@tonic-gate siginfo.si_code = watchcode; 8187c478bd9Sstevel@tonic-gate siginfo.si_addr = vaddr; 8197c478bd9Sstevel@tonic-gate siginfo.si_trapafter = 0; 8207c478bd9Sstevel@tonic-gate siginfo.si_pc = (caddr_t)rp->r_pc; 8217c478bd9Sstevel@tonic-gate fault = FLTWATCH; 8227c478bd9Sstevel@tonic-gate break; 8237c478bd9Sstevel@tonic-gate } 8247c478bd9Sstevel@tonic-gate } else { 8257c478bd9Sstevel@tonic-gate /* XXX pr_watch_emul() never succeeds (for now) */ 8267c478bd9Sstevel@tonic-gate if (rw != S_EXEC && pr_watch_emul(rp, vaddr, rw)) 8277c478bd9Sstevel@tonic-gate goto out; 8287c478bd9Sstevel@tonic-gate do_watch_step(vaddr, sz, rw, 0, 0); 8297c478bd9Sstevel@tonic-gate fault_type = F_INVAL; 8307c478bd9Sstevel@tonic-gate } 8317c478bd9Sstevel@tonic-gate 8327c478bd9Sstevel@tonic-gate res = pagefault(addr, fault_type, rw, 0); 8337c478bd9Sstevel@tonic-gate 8347c478bd9Sstevel@tonic-gate /* 8357c478bd9Sstevel@tonic-gate * If pagefault() succeeded, ok. 8367c478bd9Sstevel@tonic-gate * Otherwise attempt to grow the stack. 8377c478bd9Sstevel@tonic-gate */ 8387c478bd9Sstevel@tonic-gate if (res == 0 || 8397c478bd9Sstevel@tonic-gate (res == FC_NOMAP && 8407c478bd9Sstevel@tonic-gate addr < p->p_usrstack && 8417c478bd9Sstevel@tonic-gate grow(addr))) { 8427c478bd9Sstevel@tonic-gate lwp->lwp_lastfault = FLTPAGE; 8437c478bd9Sstevel@tonic-gate lwp->lwp_lastfaddr = addr; 8447c478bd9Sstevel@tonic-gate if (prismember(&p->p_fltmask, FLTPAGE)) { 8457c478bd9Sstevel@tonic-gate bzero(&siginfo, sizeof (siginfo)); 8467c478bd9Sstevel@tonic-gate siginfo.si_addr = addr; 8477c478bd9Sstevel@tonic-gate (void) stop_on_fault(FLTPAGE, &siginfo); 8487c478bd9Sstevel@tonic-gate } 8497c478bd9Sstevel@tonic-gate goto out; 8507c478bd9Sstevel@tonic-gate } else if (res == FC_PROT && addr < p->p_usrstack && 8517c478bd9Sstevel@tonic-gate (mmu.pt_nx != 0 && (errcode & PF_ERR_EXEC))) { 8527c478bd9Sstevel@tonic-gate report_stack_exec(p, addr); 8537c478bd9Sstevel@tonic-gate } 8547c478bd9Sstevel@tonic-gate 8557c478bd9Sstevel@tonic-gate #ifdef OPTERON_ERRATUM_91 8567c478bd9Sstevel@tonic-gate /* 8577c478bd9Sstevel@tonic-gate * Workaround for Opteron Erratum 91. Prefetches may generate a 8587c478bd9Sstevel@tonic-gate * page fault (they're not supposed to do that!). If this 8597c478bd9Sstevel@tonic-gate * occurs we simply return back to the instruction. 8607c478bd9Sstevel@tonic-gate * 8617c478bd9Sstevel@tonic-gate * We rely on copyin to properly fault in the page with r_pc. 8627c478bd9Sstevel@tonic-gate */ 8637c478bd9Sstevel@tonic-gate if (opteron_erratum_91 && 8647c478bd9Sstevel@tonic-gate addr != (caddr_t)rp->r_pc && 8657c478bd9Sstevel@tonic-gate instr_is_prefetch((caddr_t)rp->r_pc)) { 8667c478bd9Sstevel@tonic-gate #ifdef DEBUG 8677c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, "Opteron erratum 91 occurred: " 8687c478bd9Sstevel@tonic-gate "prefetch at %p in pid %d generated a trap!", 8697c478bd9Sstevel@tonic-gate (void *)rp->r_pc, p->p_pid); 8707c478bd9Sstevel@tonic-gate #endif /* DEBUG */ 8717c478bd9Sstevel@tonic-gate goto out; 8727c478bd9Sstevel@tonic-gate } 8737c478bd9Sstevel@tonic-gate #endif /* OPTERON_ERRATUM_91 */ 8747c478bd9Sstevel@tonic-gate 8757c478bd9Sstevel@tonic-gate if (tudebug) 8767c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 8777c478bd9Sstevel@tonic-gate /* 8787c478bd9Sstevel@tonic-gate * In the case where both pagefault and grow fail, 8797c478bd9Sstevel@tonic-gate * set the code to the value provided by pagefault. 8807c478bd9Sstevel@tonic-gate * We map all errors returned from pagefault() to SIGSEGV. 8817c478bd9Sstevel@tonic-gate */ 8827c478bd9Sstevel@tonic-gate bzero(&siginfo, sizeof (siginfo)); 8837c478bd9Sstevel@tonic-gate siginfo.si_addr = addr; 8847c478bd9Sstevel@tonic-gate switch (FC_CODE(res)) { 8857c478bd9Sstevel@tonic-gate case FC_HWERR: 8867c478bd9Sstevel@tonic-gate case FC_NOSUPPORT: 8877c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGBUS; 8887c478bd9Sstevel@tonic-gate siginfo.si_code = BUS_ADRERR; 8897c478bd9Sstevel@tonic-gate fault = FLTACCESS; 8907c478bd9Sstevel@tonic-gate break; 8917c478bd9Sstevel@tonic-gate case FC_ALIGN: 8927c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGBUS; 8937c478bd9Sstevel@tonic-gate siginfo.si_code = BUS_ADRALN; 8947c478bd9Sstevel@tonic-gate fault = FLTACCESS; 8957c478bd9Sstevel@tonic-gate break; 8967c478bd9Sstevel@tonic-gate case FC_OBJERR: 8977c478bd9Sstevel@tonic-gate if ((siginfo.si_errno = FC_ERRNO(res)) != EINTR) { 8987c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGBUS; 8997c478bd9Sstevel@tonic-gate siginfo.si_code = BUS_OBJERR; 9007c478bd9Sstevel@tonic-gate fault = FLTACCESS; 9017c478bd9Sstevel@tonic-gate } 9027c478bd9Sstevel@tonic-gate break; 9037c478bd9Sstevel@tonic-gate default: /* FC_NOMAP or FC_PROT */ 9047c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGSEGV; 9057c478bd9Sstevel@tonic-gate siginfo.si_code = 9067c478bd9Sstevel@tonic-gate (res == FC_NOMAP)? SEGV_MAPERR : SEGV_ACCERR; 9077c478bd9Sstevel@tonic-gate fault = FLTBOUNDS; 9087c478bd9Sstevel@tonic-gate break; 9097c478bd9Sstevel@tonic-gate } 9107c478bd9Sstevel@tonic-gate break; 9117c478bd9Sstevel@tonic-gate 9127c478bd9Sstevel@tonic-gate case T_ILLINST + USER: /* invalid opcode fault */ 9137c478bd9Sstevel@tonic-gate /* 9147c478bd9Sstevel@tonic-gate * If the syscall instruction is disabled due to LDT usage, a 9157c478bd9Sstevel@tonic-gate * user program that attempts to execute it will trigger a #ud 9167c478bd9Sstevel@tonic-gate * trap. Check for that case here. If this occurs on a CPU which 9177c478bd9Sstevel@tonic-gate * doesn't even support syscall, the result of all of this will 9187c478bd9Sstevel@tonic-gate * be to emulate that particular instruction. 9197c478bd9Sstevel@tonic-gate */ 9207c478bd9Sstevel@tonic-gate if (p->p_ldt != NULL && 921ddece0baSsethg ldt_rewrite_syscall(rp, p, X86_ASYSC)) 9227c478bd9Sstevel@tonic-gate goto out; 923130a12b8Sfvdl 924130a12b8Sfvdl #ifdef __amd64 925130a12b8Sfvdl /* 926130a12b8Sfvdl * Emulate the LAHF and SAHF instructions if needed. 927130a12b8Sfvdl * See the instr_is_lsahf function for details. 928130a12b8Sfvdl */ 929130a12b8Sfvdl if (p->p_model == DATAMODEL_LP64 && 930130a12b8Sfvdl instr_is_lsahf((caddr_t)rp->r_pc, &instr)) { 931130a12b8Sfvdl emulate_lsahf(rp, instr); 932130a12b8Sfvdl goto out; 933130a12b8Sfvdl } 934130a12b8Sfvdl #endif 935130a12b8Sfvdl 9367c478bd9Sstevel@tonic-gate /*FALLTHROUGH*/ 9377c478bd9Sstevel@tonic-gate 9387c478bd9Sstevel@tonic-gate if (tudebug) 9397c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 9407c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGILL; 9417c478bd9Sstevel@tonic-gate siginfo.si_code = ILL_ILLOPC; 9427c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 9437c478bd9Sstevel@tonic-gate fault = FLTILL; 9447c478bd9Sstevel@tonic-gate break; 9457c478bd9Sstevel@tonic-gate 9467c478bd9Sstevel@tonic-gate case T_ZERODIV + USER: /* integer divide by zero */ 9477c478bd9Sstevel@tonic-gate if (tudebug && tudebugfpe) 9487c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 9497c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGFPE; 9507c478bd9Sstevel@tonic-gate siginfo.si_code = FPE_INTDIV; 9517c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 9527c478bd9Sstevel@tonic-gate fault = FLTIZDIV; 9537c478bd9Sstevel@tonic-gate break; 9547c478bd9Sstevel@tonic-gate 9557c478bd9Sstevel@tonic-gate case T_OVFLW + USER: /* integer overflow */ 9567c478bd9Sstevel@tonic-gate if (tudebug && tudebugfpe) 9577c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 9587c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGFPE; 9597c478bd9Sstevel@tonic-gate siginfo.si_code = FPE_INTOVF; 9607c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 9617c478bd9Sstevel@tonic-gate fault = FLTIOVF; 9627c478bd9Sstevel@tonic-gate break; 9637c478bd9Sstevel@tonic-gate 9647c478bd9Sstevel@tonic-gate case T_NOEXTFLT + USER: /* math coprocessor not available */ 9657c478bd9Sstevel@tonic-gate if (tudebug && tudebugfpe) 9667c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 9677c478bd9Sstevel@tonic-gate if (fpnoextflt(rp)) { 9687c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGFPE; 9697c478bd9Sstevel@tonic-gate siginfo.si_code = ILL_ILLOPC; 9707c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 9717c478bd9Sstevel@tonic-gate fault = FLTFPE; 9727c478bd9Sstevel@tonic-gate } 9737c478bd9Sstevel@tonic-gate break; 9747c478bd9Sstevel@tonic-gate 9757c478bd9Sstevel@tonic-gate case T_EXTOVRFLT: /* extension overrun fault */ 9767c478bd9Sstevel@tonic-gate /* check if we took a kernel trap on behalf of user */ 9777c478bd9Sstevel@tonic-gate { 9787c478bd9Sstevel@tonic-gate extern void ndptrap_frstor(void); 979eae0da43Ssethg if (rp->r_pc != (uintptr_t)ndptrap_frstor) { 980eae0da43Ssethg sti(); /* T_EXTOVRFLT comes in via cmninttrap */ 9817c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 982eae0da43Ssethg } 9837c478bd9Sstevel@tonic-gate type |= USER; 9847c478bd9Sstevel@tonic-gate } 9857c478bd9Sstevel@tonic-gate /*FALLTHROUGH*/ 9867c478bd9Sstevel@tonic-gate case T_EXTOVRFLT + USER: /* extension overrun fault */ 9877c478bd9Sstevel@tonic-gate if (tudebug && tudebugfpe) 9887c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 9897c478bd9Sstevel@tonic-gate if (fpextovrflt(rp)) { 9907c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGSEGV; 9917c478bd9Sstevel@tonic-gate siginfo.si_code = SEGV_MAPERR; 9927c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 9937c478bd9Sstevel@tonic-gate fault = FLTBOUNDS; 9947c478bd9Sstevel@tonic-gate } 9957c478bd9Sstevel@tonic-gate break; 9967c478bd9Sstevel@tonic-gate 9977c478bd9Sstevel@tonic-gate case T_EXTERRFLT: /* x87 floating point exception pending */ 9987c478bd9Sstevel@tonic-gate /* check if we took a kernel trap on behalf of user */ 9997c478bd9Sstevel@tonic-gate { 10007c478bd9Sstevel@tonic-gate extern void ndptrap_frstor(void); 1001eae0da43Ssethg if (rp->r_pc != (uintptr_t)ndptrap_frstor) { 1002eae0da43Ssethg sti(); /* T_EXTERRFLT comes in via cmninttrap */ 10037c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 1004eae0da43Ssethg } 10057c478bd9Sstevel@tonic-gate type |= USER; 10067c478bd9Sstevel@tonic-gate } 10077c478bd9Sstevel@tonic-gate /*FALLTHROUGH*/ 10087c478bd9Sstevel@tonic-gate 10097c478bd9Sstevel@tonic-gate case T_EXTERRFLT + USER: /* x87 floating point exception pending */ 10107c478bd9Sstevel@tonic-gate if (tudebug && tudebugfpe) 10117c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 10127c478bd9Sstevel@tonic-gate if (sicode = fpexterrflt(rp)) { 10137c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGFPE; 10147c478bd9Sstevel@tonic-gate siginfo.si_code = sicode; 10157c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 10167c478bd9Sstevel@tonic-gate fault = FLTFPE; 10177c478bd9Sstevel@tonic-gate } 10187c478bd9Sstevel@tonic-gate break; 10197c478bd9Sstevel@tonic-gate 10207c478bd9Sstevel@tonic-gate case T_SIMDFPE + USER: /* SSE and SSE2 exceptions */ 10217c478bd9Sstevel@tonic-gate if (tudebug && tudebugsse) 10227c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 10237c478bd9Sstevel@tonic-gate if ((x86_feature & (X86_SSE|X86_SSE2)) == 0) { 10247c478bd9Sstevel@tonic-gate /* 10257c478bd9Sstevel@tonic-gate * There are rumours that some user instructions 10267c478bd9Sstevel@tonic-gate * on older CPUs can cause this trap to occur; in 10277c478bd9Sstevel@tonic-gate * which case send a SIGILL instead of a SIGFPE. 10287c478bd9Sstevel@tonic-gate */ 10297c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGILL; 10307c478bd9Sstevel@tonic-gate siginfo.si_code = ILL_ILLTRP; 10317c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 10327c478bd9Sstevel@tonic-gate siginfo.si_trapno = type & ~USER; 10337c478bd9Sstevel@tonic-gate fault = FLTILL; 10347c478bd9Sstevel@tonic-gate } else if ((sicode = fpsimderrflt(rp)) != 0) { 10357c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGFPE; 10367c478bd9Sstevel@tonic-gate siginfo.si_code = sicode; 10377c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 10387c478bd9Sstevel@tonic-gate fault = FLTFPE; 10397c478bd9Sstevel@tonic-gate } 1040eae0da43Ssethg 1041eae0da43Ssethg sti(); /* The SIMD exception comes in via cmninttrap */ 10427c478bd9Sstevel@tonic-gate break; 10437c478bd9Sstevel@tonic-gate 10447c478bd9Sstevel@tonic-gate case T_BPTFLT: /* breakpoint trap */ 10457c478bd9Sstevel@tonic-gate /* 10467c478bd9Sstevel@tonic-gate * Kernel breakpoint traps should only happen when kmdb is 10477c478bd9Sstevel@tonic-gate * active, and even then, it'll have interposed on the IDT, so 10487c478bd9Sstevel@tonic-gate * control won't get here. If it does, we've hit a breakpoint 10497c478bd9Sstevel@tonic-gate * without the debugger, which is very strange, and very 10507c478bd9Sstevel@tonic-gate * fatal. 10517c478bd9Sstevel@tonic-gate */ 10527c478bd9Sstevel@tonic-gate if (tudebug && tudebugbpt) 10537c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 10547c478bd9Sstevel@tonic-gate 10557c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 10567c478bd9Sstevel@tonic-gate break; 10577c478bd9Sstevel@tonic-gate 10587c478bd9Sstevel@tonic-gate case T_SGLSTP: /* single step/hw breakpoint exception */ 10597c478bd9Sstevel@tonic-gate 10607c478bd9Sstevel@tonic-gate /* Now evaluate how we got here */ 10617c478bd9Sstevel@tonic-gate if (lwp != NULL && (lwp->lwp_pcb.pcb_drstat & DR_SINGLESTEP)) { 10627c478bd9Sstevel@tonic-gate /* 10637c478bd9Sstevel@tonic-gate * i386 single-steps even through lcalls which 10647c478bd9Sstevel@tonic-gate * change the privilege level. So we take a trap at 10657c478bd9Sstevel@tonic-gate * the first instruction in privileged mode. 10667c478bd9Sstevel@tonic-gate * 10677c478bd9Sstevel@tonic-gate * Set a flag to indicate that upon completion of 10687c478bd9Sstevel@tonic-gate * the system call, deal with the single-step trap. 10697c478bd9Sstevel@tonic-gate * 10707c478bd9Sstevel@tonic-gate * The same thing happens for sysenter, too. 10717c478bd9Sstevel@tonic-gate */ 10729acbbeafSnn35248 singlestep_twiddle = 0; 10739acbbeafSnn35248 if (rp->r_pc == (uintptr_t)sys_sysenter || 10749acbbeafSnn35248 rp->r_pc == (uintptr_t)brand_sys_sysenter) { 10759acbbeafSnn35248 singlestep_twiddle = 1; 10767c478bd9Sstevel@tonic-gate #if defined(__amd64) 10777c478bd9Sstevel@tonic-gate /* 10789acbbeafSnn35248 * Since we are already on the kernel's 10799acbbeafSnn35248 * %gs, on 64-bit systems the sysenter case 10809acbbeafSnn35248 * needs to adjust the pc to avoid 10819acbbeafSnn35248 * executing the swapgs instruction at the 10829acbbeafSnn35248 * top of the handler. 10837c478bd9Sstevel@tonic-gate */ 10849acbbeafSnn35248 if (rp->r_pc == (uintptr_t)sys_sysenter) 10857c478bd9Sstevel@tonic-gate rp->r_pc = (uintptr_t) 10867c478bd9Sstevel@tonic-gate _sys_sysenter_post_swapgs; 10879acbbeafSnn35248 else 10889acbbeafSnn35248 rp->r_pc = (uintptr_t) 10899acbbeafSnn35248 _brand_sys_sysenter_post_swapgs; 10907c478bd9Sstevel@tonic-gate #endif 10919acbbeafSnn35248 } 10929acbbeafSnn35248 #if defined(__i386) 10939acbbeafSnn35248 else if (rp->r_pc == (uintptr_t)sys_call || 10949acbbeafSnn35248 rp->r_pc == (uintptr_t)brand_sys_call) { 10959acbbeafSnn35248 singlestep_twiddle = 1; 10969acbbeafSnn35248 } 10979acbbeafSnn35248 #endif 10986db33255Sdmick else { 10996db33255Sdmick /* not on sysenter/syscall; uregs available */ 11006db33255Sdmick if (tudebug && tudebugbpt) 11016db33255Sdmick showregs(type, rp, (caddr_t)0); 11026db33255Sdmick } 11039acbbeafSnn35248 if (singlestep_twiddle) { 11047c478bd9Sstevel@tonic-gate rp->r_ps &= ~PS_T; /* turn off trace */ 11057c478bd9Sstevel@tonic-gate lwp->lwp_pcb.pcb_flags |= DEBUG_PENDING; 1106ae115bc7Smrj ct->t_post_sys = 1; 1107d8aa0f5aSsudheer aston(curthread); 11087c478bd9Sstevel@tonic-gate goto cleanup; 11097c478bd9Sstevel@tonic-gate } 11107c478bd9Sstevel@tonic-gate } 11117c478bd9Sstevel@tonic-gate /* XXX - needs review on debugger interface? */ 11127c478bd9Sstevel@tonic-gate if (boothowto & RB_DEBUG) 11137c478bd9Sstevel@tonic-gate debug_enter((char *)NULL); 11147c478bd9Sstevel@tonic-gate else 11157c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 11167c478bd9Sstevel@tonic-gate break; 11177c478bd9Sstevel@tonic-gate 11187c478bd9Sstevel@tonic-gate case T_NMIFLT: /* NMI interrupt */ 11197c478bd9Sstevel@tonic-gate printf("Unexpected NMI in system mode\n"); 11207c478bd9Sstevel@tonic-gate goto cleanup; 11217c478bd9Sstevel@tonic-gate 11227c478bd9Sstevel@tonic-gate case T_NMIFLT + USER: /* NMI interrupt */ 11237c478bd9Sstevel@tonic-gate printf("Unexpected NMI in user mode\n"); 11247c478bd9Sstevel@tonic-gate break; 11257c478bd9Sstevel@tonic-gate 11267c478bd9Sstevel@tonic-gate case T_GPFLT: /* general protection violation */ 11277c478bd9Sstevel@tonic-gate /* 1128a4e4e13fSgavinm * Any #GP that occurs during an on_trap .. no_trap bracket 1129a4e4e13fSgavinm * with OT_DATA_ACCESS or OT_SEGMENT_ACCESS protection, 1130a4e4e13fSgavinm * or in a on_fault .. no_fault bracket, is forgiven 1131a4e4e13fSgavinm * and we trampoline. This protection is given regardless 1132a4e4e13fSgavinm * of whether we are 32/64 bit etc - if a distinction is 1133a4e4e13fSgavinm * required then define new on_trap protection types. 1134a4e4e13fSgavinm * 11357c478bd9Sstevel@tonic-gate * On amd64, we can get a #gp from referencing addresses 1136843e1988Sjohnlev * in the virtual address hole e.g. from a copyin or in 1137843e1988Sjohnlev * update_sregs while updating user segment registers. 1138843e1988Sjohnlev * 1139843e1988Sjohnlev * On the 32-bit hypervisor we could also generate one in 1140843e1988Sjohnlev * mfn_to_pfn by reaching around or into where the hypervisor 1141843e1988Sjohnlev * lives which is protected by segmentation. 11427c478bd9Sstevel@tonic-gate */ 11437c478bd9Sstevel@tonic-gate 11447c478bd9Sstevel@tonic-gate /* 11457c478bd9Sstevel@tonic-gate * If we're under on_trap() protection (see <sys/ontrap.h>), 114620c794b3Sgavinm * set ot_trap and trampoline back to the on_trap() call site 1147843e1988Sjohnlev * for OT_DATA_ACCESS or OT_SEGMENT_ACCESS. 11487c478bd9Sstevel@tonic-gate */ 1149ae115bc7Smrj if (ct->t_ontrap != NULL) { 1150843e1988Sjohnlev int ttype = ct->t_ontrap->ot_prot & 1151843e1988Sjohnlev (OT_DATA_ACCESS | OT_SEGMENT_ACCESS); 1152ae115bc7Smrj 1153843e1988Sjohnlev if (ttype != 0) { 1154843e1988Sjohnlev ct->t_ontrap->ot_trap |= ttype; 1155843e1988Sjohnlev if (tudebug) 1156843e1988Sjohnlev showregs(type, rp, (caddr_t)0); 115720c794b3Sgavinm rp->r_pc = ct->t_ontrap->ot_trampoline; 115820c794b3Sgavinm goto cleanup; 11597c478bd9Sstevel@tonic-gate } 1160843e1988Sjohnlev } 11617c478bd9Sstevel@tonic-gate 11627c478bd9Sstevel@tonic-gate /* 11637c478bd9Sstevel@tonic-gate * If we're under lofault protection (copyin etc.), 11647c478bd9Sstevel@tonic-gate * longjmp back to lofault with an EFAULT. 11657c478bd9Sstevel@tonic-gate */ 1166ae115bc7Smrj if (ct->t_lofault) { 11677c478bd9Sstevel@tonic-gate /* 11687c478bd9Sstevel@tonic-gate * Fault is not resolvable, so just return to lofault 11697c478bd9Sstevel@tonic-gate */ 11707c478bd9Sstevel@tonic-gate if (lodebug) { 11717c478bd9Sstevel@tonic-gate showregs(type, rp, addr); 11727c478bd9Sstevel@tonic-gate traceregs(rp); 11737c478bd9Sstevel@tonic-gate } 11747c478bd9Sstevel@tonic-gate rp->r_r0 = EFAULT; 1175ae115bc7Smrj rp->r_pc = ct->t_lofault; 11767c478bd9Sstevel@tonic-gate goto cleanup; 11777c478bd9Sstevel@tonic-gate } 1178a4e4e13fSgavinm 1179a4e4e13fSgavinm /* 1180a4e4e13fSgavinm * We fall through to the next case, which repeats 1181a4e4e13fSgavinm * the OT_SEGMENT_ACCESS check which we've already 1182a4e4e13fSgavinm * done, so we'll always fall through to the 1183a4e4e13fSgavinm * T_STKFLT case. 1184a4e4e13fSgavinm */ 11857c478bd9Sstevel@tonic-gate /*FALLTHROUGH*/ 1186ae115bc7Smrj case T_SEGFLT: /* segment not present fault */ 1187ae115bc7Smrj /* 1188ae115bc7Smrj * One example of this is #NP in update_sregs while 1189ae115bc7Smrj * attempting to update a user segment register 1190ae115bc7Smrj * that points to a descriptor that is marked not 1191ae115bc7Smrj * present. 1192ae115bc7Smrj */ 1193ae115bc7Smrj if (ct->t_ontrap != NULL && 1194ae115bc7Smrj ct->t_ontrap->ot_prot & OT_SEGMENT_ACCESS) { 1195ae115bc7Smrj ct->t_ontrap->ot_trap |= OT_SEGMENT_ACCESS; 1196843e1988Sjohnlev if (tudebug) 1197843e1988Sjohnlev showregs(type, rp, (caddr_t)0); 119820c794b3Sgavinm rp->r_pc = ct->t_ontrap->ot_trampoline; 119920c794b3Sgavinm goto cleanup; 1200ae115bc7Smrj } 1201ae115bc7Smrj /*FALLTHROUGH*/ 12027c478bd9Sstevel@tonic-gate case T_STKFLT: /* stack fault */ 12037c478bd9Sstevel@tonic-gate case T_TSSFLT: /* invalid TSS fault */ 12047c478bd9Sstevel@tonic-gate if (tudebug) 12057c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 12067c478bd9Sstevel@tonic-gate if (kern_gpfault(rp)) 12077c478bd9Sstevel@tonic-gate (void) die(type, rp, addr, cpuid); 12087c478bd9Sstevel@tonic-gate goto cleanup; 12097c478bd9Sstevel@tonic-gate 12107c478bd9Sstevel@tonic-gate /* 1211ae115bc7Smrj * ONLY 32-bit PROCESSES can USE a PRIVATE LDT! 64-bit apps 1212ae115bc7Smrj * should have no need for them, so we put a stop to it here. 12137c478bd9Sstevel@tonic-gate * 1214ae115bc7Smrj * So: not-present fault is ONLY valid for 32-bit processes with 1215ae115bc7Smrj * a private LDT trying to do a system call. Emulate it. 12160baeff3dSrab * 1217ae115bc7Smrj * #gp fault is ONLY valid for 32-bit processes also, which DO NOT 1218ae115bc7Smrj * have a private LDT, and are trying to do a system call. Emulate it. 12190baeff3dSrab */ 1220ae115bc7Smrj 12210baeff3dSrab case T_SEGFLT + USER: /* segment not present fault */ 12220baeff3dSrab case T_GPFLT + USER: /* general protection violation */ 12230baeff3dSrab #ifdef _SYSCALL32_IMPL 12240baeff3dSrab if (p->p_model != DATAMODEL_NATIVE) { 12250baeff3dSrab #endif /* _SYSCALL32_IMPL */ 1226ddece0baSsethg if (instr_is_lcall_syscall((caddr_t)rp->r_pc)) { 12270baeff3dSrab if (type == T_SEGFLT + USER) 12280baeff3dSrab ASSERT(p->p_ldt != NULL); 12290baeff3dSrab 12300baeff3dSrab if ((p->p_ldt == NULL && type == T_GPFLT + USER) || 12310baeff3dSrab type == T_SEGFLT + USER) { 12320baeff3dSrab 12330baeff3dSrab /* 12340baeff3dSrab * The user attempted a system call via the obsolete 12350baeff3dSrab * call gate mechanism. Because the process doesn't have 12360baeff3dSrab * an LDT (i.e. the ldtr contains 0), a #gp results. 12370baeff3dSrab * Emulate the syscall here, just as we do above for a 12380baeff3dSrab * #np trap. 12390baeff3dSrab */ 12400baeff3dSrab 12410baeff3dSrab /* 12427c478bd9Sstevel@tonic-gate * Since this is a not-present trap, rp->r_pc points to 12437c478bd9Sstevel@tonic-gate * the trapping lcall instruction. We need to bump it 12447c478bd9Sstevel@tonic-gate * to the next insn so the app can continue on. 12457c478bd9Sstevel@tonic-gate */ 12467c478bd9Sstevel@tonic-gate rp->r_pc += LCALLSIZE; 12477c478bd9Sstevel@tonic-gate lwp->lwp_regs = rp; 12487c478bd9Sstevel@tonic-gate 12497c478bd9Sstevel@tonic-gate /* 12507c478bd9Sstevel@tonic-gate * Normally the microstate of the LWP is forced back to 12517c478bd9Sstevel@tonic-gate * LMS_USER by the syscall handlers. Emulate that 12527c478bd9Sstevel@tonic-gate * behavior here. 12537c478bd9Sstevel@tonic-gate */ 12547c478bd9Sstevel@tonic-gate mstate = LMS_USER; 12557c478bd9Sstevel@tonic-gate 12567c478bd9Sstevel@tonic-gate dosyscall(); 12577c478bd9Sstevel@tonic-gate goto out; 12587c478bd9Sstevel@tonic-gate } 12590baeff3dSrab } 12600baeff3dSrab #ifdef _SYSCALL32_IMPL 12610baeff3dSrab } 12627c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32_IMPL */ 12637c478bd9Sstevel@tonic-gate /* 12647c478bd9Sstevel@tonic-gate * If the current process is using a private LDT and the 12657c478bd9Sstevel@tonic-gate * trapping instruction is sysenter, the sysenter instruction 12667c478bd9Sstevel@tonic-gate * has been disabled on the CPU because it destroys segment 12677c478bd9Sstevel@tonic-gate * registers. If this is the case, rewrite the instruction to 12687c478bd9Sstevel@tonic-gate * be a safe system call and retry it. If this occurs on a CPU 12697c478bd9Sstevel@tonic-gate * which doesn't even support sysenter, the result of all of 12707c478bd9Sstevel@tonic-gate * this will be to emulate that particular instruction. 12717c478bd9Sstevel@tonic-gate */ 12727c478bd9Sstevel@tonic-gate if (p->p_ldt != NULL && 1273ddece0baSsethg ldt_rewrite_syscall(rp, p, X86_SEP)) 12747c478bd9Sstevel@tonic-gate goto out; 1275ddece0baSsethg 12767c478bd9Sstevel@tonic-gate /*FALLTHROUGH*/ 12777c478bd9Sstevel@tonic-gate 12787c478bd9Sstevel@tonic-gate case T_BOUNDFLT + USER: /* bound fault */ 12797c478bd9Sstevel@tonic-gate case T_STKFLT + USER: /* stack fault */ 12807c478bd9Sstevel@tonic-gate case T_TSSFLT + USER: /* invalid TSS fault */ 12817c478bd9Sstevel@tonic-gate if (tudebug) 12827c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 12837c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGSEGV; 12847c478bd9Sstevel@tonic-gate siginfo.si_code = SEGV_MAPERR; 12857c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 12867c478bd9Sstevel@tonic-gate fault = FLTBOUNDS; 12877c478bd9Sstevel@tonic-gate break; 12887c478bd9Sstevel@tonic-gate 12897c478bd9Sstevel@tonic-gate case T_ALIGNMENT + USER: /* user alignment error (486) */ 12907c478bd9Sstevel@tonic-gate if (tudebug) 12917c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 12927c478bd9Sstevel@tonic-gate bzero(&siginfo, sizeof (siginfo)); 12937c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGBUS; 12947c478bd9Sstevel@tonic-gate siginfo.si_code = BUS_ADRALN; 12957c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 12967c478bd9Sstevel@tonic-gate fault = FLTACCESS; 12977c478bd9Sstevel@tonic-gate break; 12987c478bd9Sstevel@tonic-gate 12997c478bd9Sstevel@tonic-gate case T_SGLSTP + USER: /* single step/hw breakpoint exception */ 13007c478bd9Sstevel@tonic-gate if (tudebug && tudebugbpt) 13017c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 13027c478bd9Sstevel@tonic-gate 13037c478bd9Sstevel@tonic-gate /* Was it single-stepping? */ 13047c478bd9Sstevel@tonic-gate if (lwp->lwp_pcb.pcb_drstat & DR_SINGLESTEP) { 13057c478bd9Sstevel@tonic-gate pcb_t *pcb = &lwp->lwp_pcb; 13067c478bd9Sstevel@tonic-gate 13077c478bd9Sstevel@tonic-gate rp->r_ps &= ~PS_T; 13087c478bd9Sstevel@tonic-gate /* 13097c478bd9Sstevel@tonic-gate * If both NORMAL_STEP and WATCH_STEP are in effect, 13109acbbeafSnn35248 * give precedence to WATCH_STEP. If neither is set, 13117c478bd9Sstevel@tonic-gate * user must have set the PS_T bit in %efl; treat this 13127c478bd9Sstevel@tonic-gate * as NORMAL_STEP. 13137c478bd9Sstevel@tonic-gate */ 13149acbbeafSnn35248 if ((fault = undo_watch_step(&siginfo)) == 0 && 13159acbbeafSnn35248 ((pcb->pcb_flags & NORMAL_STEP) || 13169acbbeafSnn35248 !(pcb->pcb_flags & WATCH_STEP))) { 13177c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGTRAP; 13187c478bd9Sstevel@tonic-gate siginfo.si_code = TRAP_TRACE; 13197c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 13207c478bd9Sstevel@tonic-gate fault = FLTTRACE; 13217c478bd9Sstevel@tonic-gate } 13227c478bd9Sstevel@tonic-gate pcb->pcb_flags &= ~(NORMAL_STEP|WATCH_STEP); 13237c478bd9Sstevel@tonic-gate } else { 13247c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, 13257c478bd9Sstevel@tonic-gate "Unexpected INT 1 in user mode, dr6=%lx", 13267c478bd9Sstevel@tonic-gate lwp->lwp_pcb.pcb_drstat); 13277c478bd9Sstevel@tonic-gate } 13287c478bd9Sstevel@tonic-gate break; 13297c478bd9Sstevel@tonic-gate 13307c478bd9Sstevel@tonic-gate case T_BPTFLT + USER: /* breakpoint trap */ 13317c478bd9Sstevel@tonic-gate if (tudebug && tudebugbpt) 13327c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 13337c478bd9Sstevel@tonic-gate /* 13347c478bd9Sstevel@tonic-gate * int 3 (the breakpoint instruction) leaves the pc referring 13357c478bd9Sstevel@tonic-gate * to the address one byte after the breakpointed address. 13367c478bd9Sstevel@tonic-gate * If the P_PR_BPTADJ flag has been set via /proc, We adjust 13377c478bd9Sstevel@tonic-gate * it back so it refers to the breakpointed address. 13387c478bd9Sstevel@tonic-gate */ 13397c478bd9Sstevel@tonic-gate if (p->p_proc_flag & P_PR_BPTADJ) 13407c478bd9Sstevel@tonic-gate rp->r_pc--; 13417c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGTRAP; 13427c478bd9Sstevel@tonic-gate siginfo.si_code = TRAP_BRKPT; 13437c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 13447c478bd9Sstevel@tonic-gate fault = FLTBPT; 13457c478bd9Sstevel@tonic-gate break; 13467c478bd9Sstevel@tonic-gate 13477c478bd9Sstevel@tonic-gate case T_AST: 13487c478bd9Sstevel@tonic-gate /* 13497c478bd9Sstevel@tonic-gate * This occurs only after the cs register has been made to 13507c478bd9Sstevel@tonic-gate * look like a kernel selector, either through debugging or 13517c478bd9Sstevel@tonic-gate * possibly by functions like setcontext(). The thread is 13527c478bd9Sstevel@tonic-gate * about to cause a general protection fault at common_iret() 13537c478bd9Sstevel@tonic-gate * in locore. We let that happen immediately instead of 13547c478bd9Sstevel@tonic-gate * doing the T_AST processing. 13557c478bd9Sstevel@tonic-gate */ 13567c478bd9Sstevel@tonic-gate goto cleanup; 13577c478bd9Sstevel@tonic-gate 135820c794b3Sgavinm case T_AST + USER: /* profiling, resched, h/w error pseudo trap */ 135920c794b3Sgavinm if (lwp->lwp_pcb.pcb_flags & ASYNC_HWERR) { 136020c794b3Sgavinm proc_t *p = ttoproc(curthread); 136120c794b3Sgavinm 136220c794b3Sgavinm lwp->lwp_pcb.pcb_flags &= ~ASYNC_HWERR; 136320c794b3Sgavinm contract_process_hwerr(p->p_ct_process, p); 136420c794b3Sgavinm siginfo.si_signo = SIGKILL; 136520c794b3Sgavinm siginfo.si_code = SI_NOINFO; 136620c794b3Sgavinm } else if (lwp->lwp_pcb.pcb_flags & CPC_OVERFLOW) { 13677c478bd9Sstevel@tonic-gate lwp->lwp_pcb.pcb_flags &= ~CPC_OVERFLOW; 13687c478bd9Sstevel@tonic-gate if (kcpc_overflow_ast()) { 13697c478bd9Sstevel@tonic-gate /* 13707c478bd9Sstevel@tonic-gate * Signal performance counter overflow 13717c478bd9Sstevel@tonic-gate */ 13727c478bd9Sstevel@tonic-gate if (tudebug) 13737c478bd9Sstevel@tonic-gate showregs(type, rp, (caddr_t)0); 13747c478bd9Sstevel@tonic-gate bzero(&siginfo, sizeof (siginfo)); 13757c478bd9Sstevel@tonic-gate siginfo.si_signo = SIGEMT; 13767c478bd9Sstevel@tonic-gate siginfo.si_code = EMT_CPCOVF; 13777c478bd9Sstevel@tonic-gate siginfo.si_addr = (caddr_t)rp->r_pc; 13787c478bd9Sstevel@tonic-gate fault = FLTCPCOVF; 13797c478bd9Sstevel@tonic-gate } 13807c478bd9Sstevel@tonic-gate } 138120c794b3Sgavinm 13827c478bd9Sstevel@tonic-gate break; 13837c478bd9Sstevel@tonic-gate } 13847c478bd9Sstevel@tonic-gate 13857c478bd9Sstevel@tonic-gate /* 13867c478bd9Sstevel@tonic-gate * We can't get here from a system trap 13877c478bd9Sstevel@tonic-gate */ 13887c478bd9Sstevel@tonic-gate ASSERT(type & USER); 13897c478bd9Sstevel@tonic-gate 13907c478bd9Sstevel@tonic-gate if (fault) { 139110e812d4Saf /* We took a fault so abort single step. */ 139210e812d4Saf lwp->lwp_pcb.pcb_flags &= ~(NORMAL_STEP|WATCH_STEP); 13937c478bd9Sstevel@tonic-gate /* 13947c478bd9Sstevel@tonic-gate * Remember the fault and fault adddress 13957c478bd9Sstevel@tonic-gate * for real-time (SIGPROF) profiling. 13967c478bd9Sstevel@tonic-gate */ 13977c478bd9Sstevel@tonic-gate lwp->lwp_lastfault = fault; 13987c478bd9Sstevel@tonic-gate lwp->lwp_lastfaddr = siginfo.si_addr; 13997c478bd9Sstevel@tonic-gate 14007c478bd9Sstevel@tonic-gate DTRACE_PROC2(fault, int, fault, ksiginfo_t *, &siginfo); 14017c478bd9Sstevel@tonic-gate 14027c478bd9Sstevel@tonic-gate /* 14037c478bd9Sstevel@tonic-gate * If a debugger has declared this fault to be an 14047c478bd9Sstevel@tonic-gate * event of interest, stop the lwp. Otherwise just 14057c478bd9Sstevel@tonic-gate * deliver the associated signal. 14067c478bd9Sstevel@tonic-gate */ 14077c478bd9Sstevel@tonic-gate if (siginfo.si_signo != SIGKILL && 14087c478bd9Sstevel@tonic-gate prismember(&p->p_fltmask, fault) && 14097c478bd9Sstevel@tonic-gate stop_on_fault(fault, &siginfo) == 0) 14107c478bd9Sstevel@tonic-gate siginfo.si_signo = 0; 14117c478bd9Sstevel@tonic-gate } 14127c478bd9Sstevel@tonic-gate 14137c478bd9Sstevel@tonic-gate if (siginfo.si_signo) 14147c478bd9Sstevel@tonic-gate trapsig(&siginfo, (fault == FLTCPCOVF)? 0 : 1); 14157c478bd9Sstevel@tonic-gate 14167c478bd9Sstevel@tonic-gate if (lwp->lwp_oweupc) 14177c478bd9Sstevel@tonic-gate profil_tick(rp->r_pc); 14187c478bd9Sstevel@tonic-gate 1419ae115bc7Smrj if (ct->t_astflag | ct->t_sig_check) { 14207c478bd9Sstevel@tonic-gate /* 14217c478bd9Sstevel@tonic-gate * Turn off the AST flag before checking all the conditions that 14227c478bd9Sstevel@tonic-gate * may have caused an AST. This flag is on whenever a signal or 14237c478bd9Sstevel@tonic-gate * unusual condition should be handled after the next trap or 14247c478bd9Sstevel@tonic-gate * syscall. 14257c478bd9Sstevel@tonic-gate */ 1426ae115bc7Smrj astoff(ct); 1427d8aa0f5aSsudheer /* 1428d8aa0f5aSsudheer * If a single-step trap occurred on a syscall (see above) 1429d8aa0f5aSsudheer * recognize it now. Do this before checking for signals 1430d8aa0f5aSsudheer * because deferred_singlestep_trap() may generate a SIGTRAP to 1431d8aa0f5aSsudheer * the LWP or may otherwise mark the LWP to call issig(FORREAL). 1432d8aa0f5aSsudheer */ 1433d8aa0f5aSsudheer if (lwp->lwp_pcb.pcb_flags & DEBUG_PENDING) 1434d8aa0f5aSsudheer deferred_singlestep_trap((caddr_t)rp->r_pc); 1435d8aa0f5aSsudheer 1436ae115bc7Smrj ct->t_sig_check = 0; 14377c478bd9Sstevel@tonic-gate 14387c478bd9Sstevel@tonic-gate mutex_enter(&p->p_lock); 14397c478bd9Sstevel@tonic-gate if (curthread->t_proc_flag & TP_CHANGEBIND) { 14407c478bd9Sstevel@tonic-gate timer_lwpbind(); 14417c478bd9Sstevel@tonic-gate curthread->t_proc_flag &= ~TP_CHANGEBIND; 14427c478bd9Sstevel@tonic-gate } 14437c478bd9Sstevel@tonic-gate mutex_exit(&p->p_lock); 14447c478bd9Sstevel@tonic-gate 14457c478bd9Sstevel@tonic-gate /* 14467c478bd9Sstevel@tonic-gate * for kaio requests that are on the per-process poll queue, 14477c478bd9Sstevel@tonic-gate * aiop->aio_pollq, they're AIO_POLL bit is set, the kernel 14487c478bd9Sstevel@tonic-gate * should copyout their result_t to user memory. by copying 14497c478bd9Sstevel@tonic-gate * out the result_t, the user can poll on memory waiting 14507c478bd9Sstevel@tonic-gate * for the kaio request to complete. 14517c478bd9Sstevel@tonic-gate */ 14527c478bd9Sstevel@tonic-gate if (p->p_aio) 14537c478bd9Sstevel@tonic-gate aio_cleanup(0); 14547c478bd9Sstevel@tonic-gate /* 14557c478bd9Sstevel@tonic-gate * If this LWP was asked to hold, call holdlwp(), which will 14567c478bd9Sstevel@tonic-gate * stop. holdlwps() sets this up and calls pokelwps() which 14577c478bd9Sstevel@tonic-gate * sets the AST flag. 14587c478bd9Sstevel@tonic-gate * 14597c478bd9Sstevel@tonic-gate * Also check TP_EXITLWP, since this is used by fresh new LWPs 14607c478bd9Sstevel@tonic-gate * through lwp_rtt(). That flag is set if the lwp_create(2) 14617c478bd9Sstevel@tonic-gate * syscall failed after creating the LWP. 14627c478bd9Sstevel@tonic-gate */ 14637c478bd9Sstevel@tonic-gate if (ISHOLD(p)) 14647c478bd9Sstevel@tonic-gate holdlwp(); 14657c478bd9Sstevel@tonic-gate 14667c478bd9Sstevel@tonic-gate /* 14677c478bd9Sstevel@tonic-gate * All code that sets signals and makes ISSIG evaluate true must 14687c478bd9Sstevel@tonic-gate * set t_astflag afterwards. 14697c478bd9Sstevel@tonic-gate */ 1470ae115bc7Smrj if (ISSIG_PENDING(ct, lwp, p)) { 14717c478bd9Sstevel@tonic-gate if (issig(FORREAL)) 14727c478bd9Sstevel@tonic-gate psig(); 1473ae115bc7Smrj ct->t_sig_check = 1; 14747c478bd9Sstevel@tonic-gate } 14757c478bd9Sstevel@tonic-gate 1476ae115bc7Smrj if (ct->t_rprof != NULL) { 14777c478bd9Sstevel@tonic-gate realsigprof(0, 0); 1478ae115bc7Smrj ct->t_sig_check = 1; 14797c478bd9Sstevel@tonic-gate } 148065a89a64Smarx 148165a89a64Smarx /* 148265a89a64Smarx * /proc can't enable/disable the trace bit itself 148365a89a64Smarx * because that could race with the call gate used by 148465a89a64Smarx * system calls via "lcall". If that happened, an 148565a89a64Smarx * invalid EFLAGS would result. prstep()/prnostep() 148665a89a64Smarx * therefore schedule an AST for the purpose. 148765a89a64Smarx */ 148865a89a64Smarx if (lwp->lwp_pcb.pcb_flags & REQUEST_STEP) { 148965a89a64Smarx lwp->lwp_pcb.pcb_flags &= ~REQUEST_STEP; 149065a89a64Smarx rp->r_ps |= PS_T; 149165a89a64Smarx } 149265a89a64Smarx if (lwp->lwp_pcb.pcb_flags & REQUEST_NOSTEP) { 149365a89a64Smarx lwp->lwp_pcb.pcb_flags &= ~REQUEST_NOSTEP; 149465a89a64Smarx rp->r_ps &= ~PS_T; 149565a89a64Smarx } 14967c478bd9Sstevel@tonic-gate } 14977c478bd9Sstevel@tonic-gate 14987c478bd9Sstevel@tonic-gate out: /* We can't get here from a system trap */ 14997c478bd9Sstevel@tonic-gate ASSERT(type & USER); 15007c478bd9Sstevel@tonic-gate 15017c478bd9Sstevel@tonic-gate if (ISHOLD(p)) 15027c478bd9Sstevel@tonic-gate holdlwp(); 15037c478bd9Sstevel@tonic-gate 15047c478bd9Sstevel@tonic-gate /* 15057c478bd9Sstevel@tonic-gate * Set state to LWP_USER here so preempt won't give us a kernel 15067c478bd9Sstevel@tonic-gate * priority if it occurs after this point. Call CL_TRAPRET() to 15077c478bd9Sstevel@tonic-gate * restore the user-level priority. 15087c478bd9Sstevel@tonic-gate * 15097c478bd9Sstevel@tonic-gate * It is important that no locks (other than spinlocks) be entered 15107c478bd9Sstevel@tonic-gate * after this point before returning to user mode (unless lwp_state 15117c478bd9Sstevel@tonic-gate * is set back to LWP_SYS). 15127c478bd9Sstevel@tonic-gate */ 15137c478bd9Sstevel@tonic-gate lwp->lwp_state = LWP_USER; 15147c478bd9Sstevel@tonic-gate 1515ae115bc7Smrj if (ct->t_trapret) { 1516ae115bc7Smrj ct->t_trapret = 0; 1517ae115bc7Smrj thread_lock(ct); 1518ae115bc7Smrj CL_TRAPRET(ct); 1519ae115bc7Smrj thread_unlock(ct); 15207c478bd9Sstevel@tonic-gate } 1521c97ad5cdSakolb if (CPU->cpu_runrun || curthread->t_schedflag & TS_ANYWAITQ) 15227c478bd9Sstevel@tonic-gate preempt(); 1523ae115bc7Smrj (void) new_mstate(ct, mstate); 15247c478bd9Sstevel@tonic-gate 15257c478bd9Sstevel@tonic-gate /* Kernel probe */ 15267c478bd9Sstevel@tonic-gate TNF_PROBE_1(thread_state, "thread", /* CSTYLED */, 15277c478bd9Sstevel@tonic-gate tnf_microstate, state, LMS_USER); 15287c478bd9Sstevel@tonic-gate 15297c478bd9Sstevel@tonic-gate return; 15307c478bd9Sstevel@tonic-gate 15317c478bd9Sstevel@tonic-gate cleanup: /* system traps end up here */ 15327c478bd9Sstevel@tonic-gate ASSERT(!(type & USER)); 15337c478bd9Sstevel@tonic-gate } 15347c478bd9Sstevel@tonic-gate 15357c478bd9Sstevel@tonic-gate /* 15367c478bd9Sstevel@tonic-gate * Patch non-zero to disable preemption of threads in the kernel. 15377c478bd9Sstevel@tonic-gate */ 15387c478bd9Sstevel@tonic-gate int IGNORE_KERNEL_PREEMPTION = 0; /* XXX - delete this someday */ 15397c478bd9Sstevel@tonic-gate 15407c478bd9Sstevel@tonic-gate struct kpreempt_cnts { /* kernel preemption statistics */ 15417c478bd9Sstevel@tonic-gate int kpc_idle; /* executing idle thread */ 15427c478bd9Sstevel@tonic-gate int kpc_intr; /* executing interrupt thread */ 15437c478bd9Sstevel@tonic-gate int kpc_clock; /* executing clock thread */ 15447c478bd9Sstevel@tonic-gate int kpc_blocked; /* thread has blocked preemption (t_preempt) */ 15457c478bd9Sstevel@tonic-gate int kpc_notonproc; /* thread is surrendering processor */ 15467c478bd9Sstevel@tonic-gate int kpc_inswtch; /* thread has ratified scheduling decision */ 15477c478bd9Sstevel@tonic-gate int kpc_prilevel; /* processor interrupt level is too high */ 15487c478bd9Sstevel@tonic-gate int kpc_apreempt; /* asynchronous preemption */ 15497c478bd9Sstevel@tonic-gate int kpc_spreempt; /* synchronous preemption */ 15507c478bd9Sstevel@tonic-gate } kpreempt_cnts; 15517c478bd9Sstevel@tonic-gate 15527c478bd9Sstevel@tonic-gate /* 15537c478bd9Sstevel@tonic-gate * kernel preemption: forced rescheduling, preempt the running kernel thread. 15547c478bd9Sstevel@tonic-gate * the argument is old PIL for an interrupt, 15557c478bd9Sstevel@tonic-gate * or the distingished value KPREEMPT_SYNC. 15567c478bd9Sstevel@tonic-gate */ 15577c478bd9Sstevel@tonic-gate void 15587c478bd9Sstevel@tonic-gate kpreempt(int asyncspl) 15597c478bd9Sstevel@tonic-gate { 1560ae115bc7Smrj kthread_t *ct = curthread; 15617c478bd9Sstevel@tonic-gate 15627c478bd9Sstevel@tonic-gate if (IGNORE_KERNEL_PREEMPTION) { 15637c478bd9Sstevel@tonic-gate aston(CPU->cpu_dispthread); 15647c478bd9Sstevel@tonic-gate return; 15657c478bd9Sstevel@tonic-gate } 15667c478bd9Sstevel@tonic-gate 15677c478bd9Sstevel@tonic-gate /* 15687c478bd9Sstevel@tonic-gate * Check that conditions are right for kernel preemption 15697c478bd9Sstevel@tonic-gate */ 15707c478bd9Sstevel@tonic-gate do { 1571ae115bc7Smrj if (ct->t_preempt) { 15727c478bd9Sstevel@tonic-gate /* 15737c478bd9Sstevel@tonic-gate * either a privileged thread (idle, panic, interrupt) 15747c478bd9Sstevel@tonic-gate * or will check when t_preempt is lowered 15757c478bd9Sstevel@tonic-gate */ 1576ae115bc7Smrj if (ct->t_pri < 0) 15777c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_idle++; 1578ae115bc7Smrj else if (ct->t_flag & T_INTR_THREAD) { 15797c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_intr++; 1580ae115bc7Smrj if (ct->t_pil == CLOCK_LEVEL) 15817c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_clock++; 15827c478bd9Sstevel@tonic-gate } else 15837c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_blocked++; 15847c478bd9Sstevel@tonic-gate aston(CPU->cpu_dispthread); 15857c478bd9Sstevel@tonic-gate return; 15867c478bd9Sstevel@tonic-gate } 1587ae115bc7Smrj if (ct->t_state != TS_ONPROC || 1588ae115bc7Smrj ct->t_disp_queue != CPU->cpu_disp) { 15897c478bd9Sstevel@tonic-gate /* this thread will be calling swtch() shortly */ 15907c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_notonproc++; 15917c478bd9Sstevel@tonic-gate if (CPU->cpu_thread != CPU->cpu_dispthread) { 15927c478bd9Sstevel@tonic-gate /* already in swtch(), force another */ 15937c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_inswtch++; 15947c478bd9Sstevel@tonic-gate siron(); 15957c478bd9Sstevel@tonic-gate } 15967c478bd9Sstevel@tonic-gate return; 15977c478bd9Sstevel@tonic-gate } 15987c478bd9Sstevel@tonic-gate if (getpil() >= DISP_LEVEL) { 15997c478bd9Sstevel@tonic-gate /* 16007c478bd9Sstevel@tonic-gate * We can't preempt this thread if it is at 16017c478bd9Sstevel@tonic-gate * a PIL >= DISP_LEVEL since it may be holding 16027c478bd9Sstevel@tonic-gate * a spin lock (like sched_lock). 16037c478bd9Sstevel@tonic-gate */ 16047c478bd9Sstevel@tonic-gate siron(); /* check back later */ 16057c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_prilevel++; 16067c478bd9Sstevel@tonic-gate return; 16077c478bd9Sstevel@tonic-gate } 1608ae115bc7Smrj if (!interrupts_enabled()) { 1609ae115bc7Smrj /* 1610ae115bc7Smrj * Can't preempt while running with ints disabled 1611ae115bc7Smrj */ 1612ae115bc7Smrj kpreempt_cnts.kpc_prilevel++; 1613ae115bc7Smrj return; 1614ae115bc7Smrj } 16157c478bd9Sstevel@tonic-gate if (asyncspl != KPREEMPT_SYNC) 16167c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_apreempt++; 16177c478bd9Sstevel@tonic-gate else 16187c478bd9Sstevel@tonic-gate kpreempt_cnts.kpc_spreempt++; 16197c478bd9Sstevel@tonic-gate 1620ae115bc7Smrj ct->t_preempt++; 16217c478bd9Sstevel@tonic-gate preempt(); 1622ae115bc7Smrj ct->t_preempt--; 16237c478bd9Sstevel@tonic-gate } while (CPU->cpu_kprunrun); 16247c478bd9Sstevel@tonic-gate } 16257c478bd9Sstevel@tonic-gate 16267c478bd9Sstevel@tonic-gate /* 16277c478bd9Sstevel@tonic-gate * Print out debugging info. 16287c478bd9Sstevel@tonic-gate */ 16297c478bd9Sstevel@tonic-gate static void 16307c478bd9Sstevel@tonic-gate showregs(uint_t type, struct regs *rp, caddr_t addr) 16317c478bd9Sstevel@tonic-gate { 16327c478bd9Sstevel@tonic-gate int s; 16337c478bd9Sstevel@tonic-gate 16347c478bd9Sstevel@tonic-gate s = spl7(); 16357c478bd9Sstevel@tonic-gate type &= ~USER; 1636ae115bc7Smrj if (PTOU(curproc)->u_comm[0]) 1637ae115bc7Smrj printf("%s: ", PTOU(curproc)->u_comm); 16387c478bd9Sstevel@tonic-gate if (type < TRAP_TYPES) 16397c478bd9Sstevel@tonic-gate printf("#%s %s\n", trap_type_mnemonic[type], trap_type[type]); 16407c478bd9Sstevel@tonic-gate else 16417c478bd9Sstevel@tonic-gate switch (type) { 16427c478bd9Sstevel@tonic-gate case T_SYSCALL: 16437c478bd9Sstevel@tonic-gate printf("Syscall Trap:\n"); 16447c478bd9Sstevel@tonic-gate break; 16457c478bd9Sstevel@tonic-gate case T_AST: 16467c478bd9Sstevel@tonic-gate printf("AST\n"); 16477c478bd9Sstevel@tonic-gate break; 16487c478bd9Sstevel@tonic-gate default: 16497c478bd9Sstevel@tonic-gate printf("Bad Trap = %d\n", type); 16507c478bd9Sstevel@tonic-gate break; 16517c478bd9Sstevel@tonic-gate } 16527c478bd9Sstevel@tonic-gate if (type == T_PGFLT) { 16537c478bd9Sstevel@tonic-gate printf("Bad %s fault at addr=0x%lx\n", 16547c478bd9Sstevel@tonic-gate USERMODE(rp->r_cs) ? "user": "kernel", (uintptr_t)addr); 16557c478bd9Sstevel@tonic-gate } else if (addr) { 16567c478bd9Sstevel@tonic-gate printf("addr=0x%lx\n", (uintptr_t)addr); 16577c478bd9Sstevel@tonic-gate } 16587c478bd9Sstevel@tonic-gate 16597c478bd9Sstevel@tonic-gate printf("pid=%d, pc=0x%lx, sp=0x%lx, eflags=0x%lx\n", 16607c478bd9Sstevel@tonic-gate (ttoproc(curthread) && ttoproc(curthread)->p_pidp) ? 16617c478bd9Sstevel@tonic-gate ttoproc(curthread)->p_pid : 0, rp->r_pc, rp->r_sp, rp->r_ps); 16627c478bd9Sstevel@tonic-gate 16637c478bd9Sstevel@tonic-gate #if defined(__lint) 16647c478bd9Sstevel@tonic-gate /* 16657c478bd9Sstevel@tonic-gate * this clause can be deleted when lint bug 4870403 is fixed 16667c478bd9Sstevel@tonic-gate * (lint thinks that bit 32 is illegal in a %b format string) 16677c478bd9Sstevel@tonic-gate */ 16687c478bd9Sstevel@tonic-gate printf("cr0: %x cr4: %b\n", 16697c478bd9Sstevel@tonic-gate (uint_t)getcr0(), (uint_t)getcr4(), FMT_CR4); 16707c478bd9Sstevel@tonic-gate #else 16717c478bd9Sstevel@tonic-gate printf("cr0: %b cr4: %b\n", 16727c478bd9Sstevel@tonic-gate (uint_t)getcr0(), FMT_CR0, (uint_t)getcr4(), FMT_CR4); 1673ae115bc7Smrj #endif /* __lint */ 16747c478bd9Sstevel@tonic-gate 1675843e1988Sjohnlev printf("cr2: %lx", getcr2()); 1676843e1988Sjohnlev #if !defined(__xpv) 1677843e1988Sjohnlev printf("cr3: %lx", getcr3()); 16787c478bd9Sstevel@tonic-gate #if defined(__amd64) 1679843e1988Sjohnlev printf("cr8: %lx\n", getcr8()); 16807c478bd9Sstevel@tonic-gate #endif 1681843e1988Sjohnlev #endif 1682843e1988Sjohnlev printf("\n"); 16837c478bd9Sstevel@tonic-gate 16847c478bd9Sstevel@tonic-gate dumpregs(rp); 16857c478bd9Sstevel@tonic-gate splx(s); 16867c478bd9Sstevel@tonic-gate } 16877c478bd9Sstevel@tonic-gate 16887c478bd9Sstevel@tonic-gate static void 16897c478bd9Sstevel@tonic-gate dumpregs(struct regs *rp) 16907c478bd9Sstevel@tonic-gate { 16917c478bd9Sstevel@tonic-gate #if defined(__amd64) 16927c478bd9Sstevel@tonic-gate const char fmt[] = "\t%3s: %16lx %3s: %16lx %3s: %16lx\n"; 16937c478bd9Sstevel@tonic-gate 16947c478bd9Sstevel@tonic-gate printf(fmt, "rdi", rp->r_rdi, "rsi", rp->r_rsi, "rdx", rp->r_rdx); 16957c478bd9Sstevel@tonic-gate printf(fmt, "rcx", rp->r_rcx, " r8", rp->r_r8, " r9", rp->r_r9); 16967c478bd9Sstevel@tonic-gate printf(fmt, "rax", rp->r_rax, "rbx", rp->r_rbx, "rbp", rp->r_rbp); 16977c478bd9Sstevel@tonic-gate printf(fmt, "r10", rp->r_r10, "r11", rp->r_r11, "r12", rp->r_r12); 16987c478bd9Sstevel@tonic-gate printf(fmt, "r13", rp->r_r13, "r14", rp->r_r14, "r15", rp->r_r15); 16997c478bd9Sstevel@tonic-gate 1700ae115bc7Smrj printf(fmt, "fsb", rdmsr(MSR_AMD_FSBASE), "gsb", rdmsr(MSR_AMD_GSBASE), 1701ae115bc7Smrj " ds", rp->r_ds); 17027c478bd9Sstevel@tonic-gate printf(fmt, " es", rp->r_es, " fs", rp->r_fs, " gs", rp->r_gs); 17037c478bd9Sstevel@tonic-gate 17047c478bd9Sstevel@tonic-gate printf(fmt, "trp", rp->r_trapno, "err", rp->r_err, "rip", rp->r_rip); 17057c478bd9Sstevel@tonic-gate printf(fmt, " cs", rp->r_cs, "rfl", rp->r_rfl, "rsp", rp->r_rsp); 17067c478bd9Sstevel@tonic-gate 17077c478bd9Sstevel@tonic-gate printf("\t%3s: %16lx\n", " ss", rp->r_ss); 17087c478bd9Sstevel@tonic-gate 17097c478bd9Sstevel@tonic-gate #elif defined(__i386) 17107c478bd9Sstevel@tonic-gate const char fmt[] = "\t%3s: %8lx %3s: %8lx %3s: %8lx %3s: %8lx\n"; 17117c478bd9Sstevel@tonic-gate 17127c478bd9Sstevel@tonic-gate printf(fmt, " gs", rp->r_gs, " fs", rp->r_fs, 17137c478bd9Sstevel@tonic-gate " es", rp->r_es, " ds", rp->r_ds); 17147c478bd9Sstevel@tonic-gate printf(fmt, "edi", rp->r_edi, "esi", rp->r_esi, 17157c478bd9Sstevel@tonic-gate "ebp", rp->r_ebp, "esp", rp->r_esp); 17167c478bd9Sstevel@tonic-gate printf(fmt, "ebx", rp->r_ebx, "edx", rp->r_edx, 17177c478bd9Sstevel@tonic-gate "ecx", rp->r_ecx, "eax", rp->r_eax); 17187c478bd9Sstevel@tonic-gate printf(fmt, "trp", rp->r_trapno, "err", rp->r_err, 17197c478bd9Sstevel@tonic-gate "eip", rp->r_eip, " cs", rp->r_cs); 17207c478bd9Sstevel@tonic-gate printf("\t%3s: %8lx %3s: %8lx %3s: %8lx\n", 17217c478bd9Sstevel@tonic-gate "efl", rp->r_efl, "usp", rp->r_uesp, " ss", rp->r_ss); 17227c478bd9Sstevel@tonic-gate 17237c478bd9Sstevel@tonic-gate #endif /* __i386 */ 17247c478bd9Sstevel@tonic-gate } 17257c478bd9Sstevel@tonic-gate 17267c478bd9Sstevel@tonic-gate /* 1727843e1988Sjohnlev * Test to see if the instruction is iret on i386 or iretq on amd64. 1728843e1988Sjohnlev * 1729843e1988Sjohnlev * On the hypervisor we can only test for nopop_sys_rtt_syscall. If true 1730843e1988Sjohnlev * then we are in the context of hypervisor's failsafe handler because it 1731843e1988Sjohnlev * tried to iret and failed due to a bad selector. See xen_failsafe_callback. 1732843e1988Sjohnlev */ 1733843e1988Sjohnlev static int 1734843e1988Sjohnlev instr_is_iret(caddr_t pc) 1735843e1988Sjohnlev { 1736843e1988Sjohnlev 1737843e1988Sjohnlev #if defined(__xpv) 1738843e1988Sjohnlev extern void nopop_sys_rtt_syscall(void); 1739843e1988Sjohnlev return ((pc == (caddr_t)nopop_sys_rtt_syscall) ? 1 : 0); 1740843e1988Sjohnlev 1741843e1988Sjohnlev #else 1742843e1988Sjohnlev 1743843e1988Sjohnlev #if defined(__amd64) 1744843e1988Sjohnlev static const uint8_t iret_insn[2] = { 0x48, 0xcf }; /* iretq */ 1745843e1988Sjohnlev 1746843e1988Sjohnlev #elif defined(__i386) 1747843e1988Sjohnlev static const uint8_t iret_insn[1] = { 0xcf }; /* iret */ 1748843e1988Sjohnlev #endif /* __i386 */ 1749843e1988Sjohnlev return (bcmp(pc, iret_insn, sizeof (iret_insn)) == 0); 1750843e1988Sjohnlev 1751843e1988Sjohnlev #endif /* __xpv */ 1752843e1988Sjohnlev } 1753843e1988Sjohnlev 1754843e1988Sjohnlev #if defined(__i386) 1755843e1988Sjohnlev 1756843e1988Sjohnlev /* 1757843e1988Sjohnlev * Test to see if the instruction is part of __SEGREGS_POP 1758843e1988Sjohnlev * 1759843e1988Sjohnlev * Note carefully the appallingly awful dependency between 1760843e1988Sjohnlev * the instruction sequence used in __SEGREGS_POP and these 1761843e1988Sjohnlev * instructions encoded here. 1762843e1988Sjohnlev */ 1763843e1988Sjohnlev static int 1764843e1988Sjohnlev instr_is_segregs_pop(caddr_t pc) 1765843e1988Sjohnlev { 1766843e1988Sjohnlev static const uint8_t movw_0_esp_gs[4] = { 0x8e, 0x6c, 0x24, 0x0 }; 1767843e1988Sjohnlev static const uint8_t movw_4_esp_fs[4] = { 0x8e, 0x64, 0x24, 0x4 }; 1768843e1988Sjohnlev static const uint8_t movw_8_esp_es[4] = { 0x8e, 0x44, 0x24, 0x8 }; 1769843e1988Sjohnlev static const uint8_t movw_c_esp_ds[4] = { 0x8e, 0x5c, 0x24, 0xc }; 1770843e1988Sjohnlev 1771843e1988Sjohnlev if (bcmp(pc, movw_0_esp_gs, sizeof (movw_0_esp_gs)) == 0 || 1772843e1988Sjohnlev bcmp(pc, movw_4_esp_fs, sizeof (movw_4_esp_fs)) == 0 || 1773843e1988Sjohnlev bcmp(pc, movw_8_esp_es, sizeof (movw_8_esp_es)) == 0 || 1774843e1988Sjohnlev bcmp(pc, movw_c_esp_ds, sizeof (movw_c_esp_ds)) == 0) 1775843e1988Sjohnlev return (1); 1776843e1988Sjohnlev 1777843e1988Sjohnlev return (0); 1778843e1988Sjohnlev } 1779843e1988Sjohnlev 1780843e1988Sjohnlev #endif /* __i386 */ 1781843e1988Sjohnlev 1782843e1988Sjohnlev /* 1783843e1988Sjohnlev * Test to see if the instruction is part of _sys_rtt. 1784843e1988Sjohnlev * 1785843e1988Sjohnlev * Again on the hypervisor if we try to IRET to user land with a bad code 1786843e1988Sjohnlev * or stack selector we will get vectored through xen_failsafe_callback. 1787843e1988Sjohnlev * In which case we assume we got here via _sys_rtt since we only allow 1788843e1988Sjohnlev * IRET to user land to take place in _sys_rtt. 1789843e1988Sjohnlev */ 1790843e1988Sjohnlev static int 1791843e1988Sjohnlev instr_is_sys_rtt(caddr_t pc) 1792843e1988Sjohnlev { 1793843e1988Sjohnlev extern void _sys_rtt(), _sys_rtt_end(); 1794843e1988Sjohnlev 1795843e1988Sjohnlev if ((uintptr_t)pc < (uintptr_t)_sys_rtt || 1796843e1988Sjohnlev (uintptr_t)pc > (uintptr_t)_sys_rtt_end) 1797843e1988Sjohnlev return (0); 1798843e1988Sjohnlev 1799843e1988Sjohnlev return (1); 1800843e1988Sjohnlev } 1801843e1988Sjohnlev 1802843e1988Sjohnlev /* 18037c478bd9Sstevel@tonic-gate * Handle #gp faults in kernel mode. 18047c478bd9Sstevel@tonic-gate * 18057c478bd9Sstevel@tonic-gate * One legitimate way this can happen is if we attempt to update segment 18067c478bd9Sstevel@tonic-gate * registers to naughty values on the way out of the kernel. 18077c478bd9Sstevel@tonic-gate * 18087c478bd9Sstevel@tonic-gate * This can happen in a couple of ways: someone - either accidentally or 18097c478bd9Sstevel@tonic-gate * on purpose - creates (setcontext(2), lwp_create(2)) or modifies 18107c478bd9Sstevel@tonic-gate * (signal(2)) a ucontext that contains silly segment register values. 18117c478bd9Sstevel@tonic-gate * Or someone - either accidentally or on purpose - modifies the prgregset_t 18127c478bd9Sstevel@tonic-gate * of a subject process via /proc to contain silly segment register values. 18137c478bd9Sstevel@tonic-gate * 18147c478bd9Sstevel@tonic-gate * (The unfortunate part is that we can end up discovering the bad segment 18157c478bd9Sstevel@tonic-gate * register value in the middle of an 'iret' after we've popped most of the 18167c478bd9Sstevel@tonic-gate * stack. So it becomes quite difficult to associate an accurate ucontext 18177c478bd9Sstevel@tonic-gate * with the lwp, because the act of taking the #gp trap overwrites most of 18187c478bd9Sstevel@tonic-gate * what we were going to send the lwp.) 18197c478bd9Sstevel@tonic-gate * 18207c478bd9Sstevel@tonic-gate * OTOH if it turns out that's -not- the problem, and we're -not- an lwp 18217c478bd9Sstevel@tonic-gate * trying to return to user mode and we get a #gp fault, then we need 18227c478bd9Sstevel@tonic-gate * to die() -- which will happen if we return non-zero from this routine. 18237c478bd9Sstevel@tonic-gate */ 18247c478bd9Sstevel@tonic-gate static int 18257c478bd9Sstevel@tonic-gate kern_gpfault(struct regs *rp) 18267c478bd9Sstevel@tonic-gate { 18277c478bd9Sstevel@tonic-gate kthread_t *t = curthread; 18287c478bd9Sstevel@tonic-gate proc_t *p = ttoproc(t); 18297c478bd9Sstevel@tonic-gate klwp_t *lwp = ttolwp(t); 18307c478bd9Sstevel@tonic-gate struct regs tmpregs, *trp = NULL; 18317c478bd9Sstevel@tonic-gate caddr_t pc = (caddr_t)rp->r_pc; 18327c478bd9Sstevel@tonic-gate int v; 18337c478bd9Sstevel@tonic-gate 18347c478bd9Sstevel@tonic-gate /* 1835843e1988Sjohnlev * if we're not an lwp, or in the case of running native the 1836843e1988Sjohnlev * pc range is outside _sys_rtt, then we should immediately 1837843e1988Sjohnlev * be die()ing horribly. 18387c478bd9Sstevel@tonic-gate */ 1839843e1988Sjohnlev if (lwp == NULL || !instr_is_sys_rtt(pc)) 18407c478bd9Sstevel@tonic-gate return (1); 18417c478bd9Sstevel@tonic-gate 18427c478bd9Sstevel@tonic-gate /* 18437c478bd9Sstevel@tonic-gate * So at least we're in the right part of the kernel. 18447c478bd9Sstevel@tonic-gate * 18457c478bd9Sstevel@tonic-gate * Disassemble the instruction at the faulting pc. 18467c478bd9Sstevel@tonic-gate * Once we know what it is, we carefully reconstruct the stack 18477c478bd9Sstevel@tonic-gate * based on the order in which the stack is deconstructed in 18487c478bd9Sstevel@tonic-gate * _sys_rtt. Ew. 18497c478bd9Sstevel@tonic-gate */ 1850843e1988Sjohnlev if (instr_is_iret(pc)) { 18517c478bd9Sstevel@tonic-gate /* 1852843e1988Sjohnlev * We took the #gp while trying to perform the IRET. 18537c478bd9Sstevel@tonic-gate * This means that either %cs or %ss are bad. 18547c478bd9Sstevel@tonic-gate * All we know for sure is that most of the general 18557c478bd9Sstevel@tonic-gate * registers have been restored, including the 18567c478bd9Sstevel@tonic-gate * segment registers, and all we have left on the 18577c478bd9Sstevel@tonic-gate * topmost part of the lwp's stack are the 18587c478bd9Sstevel@tonic-gate * registers that the iretq was unable to consume. 18597c478bd9Sstevel@tonic-gate * 18607c478bd9Sstevel@tonic-gate * All the rest of the state was crushed by the #gp 18617c478bd9Sstevel@tonic-gate * which pushed -its- registers atop our old save area 18627c478bd9Sstevel@tonic-gate * (because we had to decrement the stack pointer, sigh) so 18637c478bd9Sstevel@tonic-gate * all that we can try and do is to reconstruct the 18647c478bd9Sstevel@tonic-gate * crushed frame from the #gp trap frame itself. 18657c478bd9Sstevel@tonic-gate */ 18667c478bd9Sstevel@tonic-gate trp = &tmpregs; 18677c478bd9Sstevel@tonic-gate trp->r_ss = lwptoregs(lwp)->r_ss; 18687c478bd9Sstevel@tonic-gate trp->r_sp = lwptoregs(lwp)->r_sp; 18697c478bd9Sstevel@tonic-gate trp->r_ps = lwptoregs(lwp)->r_ps; 18707c478bd9Sstevel@tonic-gate trp->r_cs = lwptoregs(lwp)->r_cs; 18717c478bd9Sstevel@tonic-gate trp->r_pc = lwptoregs(lwp)->r_pc; 18727c478bd9Sstevel@tonic-gate bcopy(rp, trp, offsetof(struct regs, r_pc)); 18737c478bd9Sstevel@tonic-gate 18747c478bd9Sstevel@tonic-gate /* 18757c478bd9Sstevel@tonic-gate * Validate simple math 18767c478bd9Sstevel@tonic-gate */ 18777c478bd9Sstevel@tonic-gate ASSERT(trp->r_pc == lwptoregs(lwp)->r_pc); 18787c478bd9Sstevel@tonic-gate ASSERT(trp->r_err == rp->r_err); 18797c478bd9Sstevel@tonic-gate 1880843e1988Sjohnlev 1881843e1988Sjohnlev 1882843e1988Sjohnlev } 1883843e1988Sjohnlev 1884843e1988Sjohnlev #if defined(__amd64) 1885843e1988Sjohnlev if (trp == NULL && lwp->lwp_pcb.pcb_rupdate != 0) { 1886843e1988Sjohnlev 1887843e1988Sjohnlev /* 1888843e1988Sjohnlev * This is the common case -- we're trying to load 1889843e1988Sjohnlev * a bad segment register value in the only section 1890843e1988Sjohnlev * of kernel code that ever loads segment registers. 1891843e1988Sjohnlev * 1892843e1988Sjohnlev * We don't need to do anything at this point because 1893843e1988Sjohnlev * the pcb contains all the pending segment register 1894843e1988Sjohnlev * state, and the regs are still intact because we 1895843e1988Sjohnlev * didn't adjust the stack pointer yet. Given the fidelity 1896843e1988Sjohnlev * of all this, we could conceivably send a signal 1897843e1988Sjohnlev * to the lwp, rather than core-ing. 1898843e1988Sjohnlev */ 1899843e1988Sjohnlev trp = lwptoregs(lwp); 1900843e1988Sjohnlev ASSERT((caddr_t)trp == (caddr_t)rp->r_sp); 19017c478bd9Sstevel@tonic-gate } 19027c478bd9Sstevel@tonic-gate 19037c478bd9Sstevel@tonic-gate #elif defined(__i386) 19047c478bd9Sstevel@tonic-gate 1905843e1988Sjohnlev if (trp == NULL && instr_is_segregs_pop(pc)) 19067c478bd9Sstevel@tonic-gate trp = lwptoregs(lwp); 1907843e1988Sjohnlev 1908843e1988Sjohnlev #endif /* __i386 */ 19097c478bd9Sstevel@tonic-gate 19107c478bd9Sstevel@tonic-gate if (trp == NULL) 19117c478bd9Sstevel@tonic-gate return (1); 19127c478bd9Sstevel@tonic-gate 19137c478bd9Sstevel@tonic-gate /* 19147c478bd9Sstevel@tonic-gate * If we get to here, we're reasonably confident that we've 19157c478bd9Sstevel@tonic-gate * correctly decoded what happened on the way out of the kernel. 19167c478bd9Sstevel@tonic-gate * Rewrite the lwp's registers so that we can create a core dump 19177c478bd9Sstevel@tonic-gate * the (at least vaguely) represents the mcontext we were 19187c478bd9Sstevel@tonic-gate * being asked to restore when things went so terribly wrong. 19197c478bd9Sstevel@tonic-gate */ 19207c478bd9Sstevel@tonic-gate 19217c478bd9Sstevel@tonic-gate /* 19227c478bd9Sstevel@tonic-gate * Make sure that we have a meaningful %trapno and %err. 19237c478bd9Sstevel@tonic-gate */ 19247c478bd9Sstevel@tonic-gate trp->r_trapno = rp->r_trapno; 19257c478bd9Sstevel@tonic-gate trp->r_err = rp->r_err; 19267c478bd9Sstevel@tonic-gate 19277c478bd9Sstevel@tonic-gate if ((caddr_t)trp != (caddr_t)lwptoregs(lwp)) 19287c478bd9Sstevel@tonic-gate bcopy(trp, lwptoregs(lwp), sizeof (*trp)); 19297c478bd9Sstevel@tonic-gate 1930843e1988Sjohnlev 19317c478bd9Sstevel@tonic-gate mutex_enter(&p->p_lock); 19327c478bd9Sstevel@tonic-gate lwp->lwp_cursig = SIGSEGV; 19337c478bd9Sstevel@tonic-gate mutex_exit(&p->p_lock); 19347c478bd9Sstevel@tonic-gate 19357c478bd9Sstevel@tonic-gate /* 1936843e1988Sjohnlev * Terminate all LWPs but don't discard them. If another lwp beat 1937843e1988Sjohnlev * us to the punch by calling exit(), evaporate now. 19387c478bd9Sstevel@tonic-gate */ 193997eda132Sraf proc_is_exiting(p); 19407c478bd9Sstevel@tonic-gate if (exitlwps(1) != 0) { 19417c478bd9Sstevel@tonic-gate mutex_enter(&p->p_lock); 19427c478bd9Sstevel@tonic-gate lwp_exit(); 19437c478bd9Sstevel@tonic-gate } 19447c478bd9Sstevel@tonic-gate 19457c478bd9Sstevel@tonic-gate if (audit_active) /* audit core dump */ 19467c478bd9Sstevel@tonic-gate audit_core_start(SIGSEGV); 19477c478bd9Sstevel@tonic-gate v = core(SIGSEGV, B_FALSE); 19487c478bd9Sstevel@tonic-gate if (audit_active) /* audit core dump */ 19497c478bd9Sstevel@tonic-gate audit_core_finish(v ? CLD_KILLED : CLD_DUMPED); 19507c478bd9Sstevel@tonic-gate exit(v ? CLD_KILLED : CLD_DUMPED, SIGSEGV); 19517c478bd9Sstevel@tonic-gate return (0); 19527c478bd9Sstevel@tonic-gate } 19537c478bd9Sstevel@tonic-gate 19547c478bd9Sstevel@tonic-gate /* 19557c478bd9Sstevel@tonic-gate * dump_tss() - Display the TSS structure 19567c478bd9Sstevel@tonic-gate */ 19577c478bd9Sstevel@tonic-gate 1958843e1988Sjohnlev #if !defined(__xpv) 19597c478bd9Sstevel@tonic-gate #if defined(__amd64) 19607c478bd9Sstevel@tonic-gate 19617c478bd9Sstevel@tonic-gate static void 19627c478bd9Sstevel@tonic-gate dump_tss(void) 19637c478bd9Sstevel@tonic-gate { 19647c478bd9Sstevel@tonic-gate const char tss_fmt[] = "tss.%s:\t0x%p\n"; /* Format string */ 19657c478bd9Sstevel@tonic-gate struct tss *tss = CPU->cpu_tss; 19667c478bd9Sstevel@tonic-gate 19677c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_rsp0", (void *)tss->tss_rsp0); 19687c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_rsp1", (void *)tss->tss_rsp1); 19697c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_rsp2", (void *)tss->tss_rsp2); 19707c478bd9Sstevel@tonic-gate 19717c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_ist1", (void *)tss->tss_ist1); 19727c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_ist2", (void *)tss->tss_ist2); 19737c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_ist3", (void *)tss->tss_ist3); 19747c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_ist4", (void *)tss->tss_ist4); 19757c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_ist5", (void *)tss->tss_ist5); 19767c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_ist6", (void *)tss->tss_ist6); 19777c478bd9Sstevel@tonic-gate printf(tss_fmt, "tss_ist7", (void *)tss->tss_ist7); 19787c478bd9Sstevel@tonic-gate } 19797c478bd9Sstevel@tonic-gate 19807c478bd9Sstevel@tonic-gate #elif defined(__i386) 19817c478bd9Sstevel@tonic-gate 19827c478bd9Sstevel@tonic-gate static void 19837c478bd9Sstevel@tonic-gate dump_tss(void) 19847c478bd9Sstevel@tonic-gate { 19857c478bd9Sstevel@tonic-gate const char tss_fmt[] = "tss.%s:\t0x%p\n"; /* Format string */ 19867c478bd9Sstevel@tonic-gate struct tss *tss = CPU->cpu_tss; 19877c478bd9Sstevel@tonic-gate 19883dfcd6dcSdmick printf(tss_fmt, "tss_link", (void *)(uintptr_t)tss->tss_link); 19893dfcd6dcSdmick printf(tss_fmt, "tss_esp0", (void *)(uintptr_t)tss->tss_esp0); 19903dfcd6dcSdmick printf(tss_fmt, "tss_ss0", (void *)(uintptr_t)tss->tss_ss0); 19913dfcd6dcSdmick printf(tss_fmt, "tss_esp1", (void *)(uintptr_t)tss->tss_esp1); 19923dfcd6dcSdmick printf(tss_fmt, "tss_ss1", (void *)(uintptr_t)tss->tss_ss1); 19933dfcd6dcSdmick printf(tss_fmt, "tss_esp2", (void *)(uintptr_t)tss->tss_esp2); 19943dfcd6dcSdmick printf(tss_fmt, "tss_ss2", (void *)(uintptr_t)tss->tss_ss2); 19953dfcd6dcSdmick printf(tss_fmt, "tss_cr3", (void *)(uintptr_t)tss->tss_cr3); 19963dfcd6dcSdmick printf(tss_fmt, "tss_eip", (void *)(uintptr_t)tss->tss_eip); 19973dfcd6dcSdmick printf(tss_fmt, "tss_eflags", (void *)(uintptr_t)tss->tss_eflags); 19983dfcd6dcSdmick printf(tss_fmt, "tss_eax", (void *)(uintptr_t)tss->tss_eax); 19993dfcd6dcSdmick printf(tss_fmt, "tss_ebx", (void *)(uintptr_t)tss->tss_ebx); 20003dfcd6dcSdmick printf(tss_fmt, "tss_ecx", (void *)(uintptr_t)tss->tss_ecx); 20013dfcd6dcSdmick printf(tss_fmt, "tss_edx", (void *)(uintptr_t)tss->tss_edx); 20023dfcd6dcSdmick printf(tss_fmt, "tss_esp", (void *)(uintptr_t)tss->tss_esp); 20037c478bd9Sstevel@tonic-gate } 20047c478bd9Sstevel@tonic-gate 20057c478bd9Sstevel@tonic-gate #endif /* __amd64 */ 2006843e1988Sjohnlev #endif /* !__xpv */ 20077c478bd9Sstevel@tonic-gate 20087c478bd9Sstevel@tonic-gate #if defined(TRAPTRACE) 20097c478bd9Sstevel@tonic-gate 2010843e1988Sjohnlev int ttrace_nrec = 10; /* number of records to dump out */ 2011843e1988Sjohnlev int ttrace_dump_nregs = 0; /* dump out this many records with regs too */ 20127c478bd9Sstevel@tonic-gate 20137c478bd9Sstevel@tonic-gate /* 20147c478bd9Sstevel@tonic-gate * Dump out the last ttrace_nrec traptrace records on each CPU 20157c478bd9Sstevel@tonic-gate */ 20167c478bd9Sstevel@tonic-gate static void 20177c478bd9Sstevel@tonic-gate dump_ttrace(void) 20187c478bd9Sstevel@tonic-gate { 20197c478bd9Sstevel@tonic-gate trap_trace_ctl_t *ttc; 20207c478bd9Sstevel@tonic-gate trap_trace_rec_t *rec; 20217c478bd9Sstevel@tonic-gate uintptr_t current; 20227c478bd9Sstevel@tonic-gate int i, j, k; 20237c478bd9Sstevel@tonic-gate int n = NCPU; 20247c478bd9Sstevel@tonic-gate #if defined(__amd64) 20257c478bd9Sstevel@tonic-gate const char banner[] = 20267c478bd9Sstevel@tonic-gate "\ncpu address timestamp " 20277c478bd9Sstevel@tonic-gate "type vc handler pc\n"; 20287c478bd9Sstevel@tonic-gate const char fmt1[] = "%3d %016lx %12llx "; 20297c478bd9Sstevel@tonic-gate #elif defined(__i386) 20307c478bd9Sstevel@tonic-gate const char banner[] = 20317c478bd9Sstevel@tonic-gate "\ncpu address timestamp type vc handler pc\n"; 20327c478bd9Sstevel@tonic-gate const char fmt1[] = "%3d %08lx %12llx "; 20337c478bd9Sstevel@tonic-gate #endif 20347c478bd9Sstevel@tonic-gate const char fmt2[] = "%4s %3x "; 20357c478bd9Sstevel@tonic-gate const char fmt3[] = "%8s "; 20367c478bd9Sstevel@tonic-gate 20377c478bd9Sstevel@tonic-gate if (ttrace_nrec == 0) 20387c478bd9Sstevel@tonic-gate return; 20397c478bd9Sstevel@tonic-gate 20407c478bd9Sstevel@tonic-gate printf(banner); 20417c478bd9Sstevel@tonic-gate 20427c478bd9Sstevel@tonic-gate for (i = 0; i < n; i++) { 20437c478bd9Sstevel@tonic-gate ttc = &trap_trace_ctl[i]; 20447c478bd9Sstevel@tonic-gate if (ttc->ttc_first == NULL) 20457c478bd9Sstevel@tonic-gate continue; 20467c478bd9Sstevel@tonic-gate 20477c478bd9Sstevel@tonic-gate current = ttc->ttc_next - sizeof (trap_trace_rec_t); 20487c478bd9Sstevel@tonic-gate for (j = 0; j < ttrace_nrec; j++) { 20497c478bd9Sstevel@tonic-gate struct sysent *sys; 20507c478bd9Sstevel@tonic-gate struct autovec *vec; 20517c478bd9Sstevel@tonic-gate extern struct av_head autovect[]; 20527c478bd9Sstevel@tonic-gate int type; 20537c478bd9Sstevel@tonic-gate ulong_t off; 20547c478bd9Sstevel@tonic-gate char *sym, *stype; 20557c478bd9Sstevel@tonic-gate 20567c478bd9Sstevel@tonic-gate if (current < ttc->ttc_first) 20577c478bd9Sstevel@tonic-gate current = 20587c478bd9Sstevel@tonic-gate ttc->ttc_limit - sizeof (trap_trace_rec_t); 20597c478bd9Sstevel@tonic-gate 20607c478bd9Sstevel@tonic-gate if (current == NULL) 20617c478bd9Sstevel@tonic-gate continue; 20627c478bd9Sstevel@tonic-gate 20637c478bd9Sstevel@tonic-gate rec = (trap_trace_rec_t *)current; 20647c478bd9Sstevel@tonic-gate 20657c478bd9Sstevel@tonic-gate if (rec->ttr_stamp == 0) 20667c478bd9Sstevel@tonic-gate break; 20677c478bd9Sstevel@tonic-gate 20687c478bd9Sstevel@tonic-gate printf(fmt1, i, (uintptr_t)rec, rec->ttr_stamp); 20697c478bd9Sstevel@tonic-gate 20707c478bd9Sstevel@tonic-gate switch (rec->ttr_marker) { 20717c478bd9Sstevel@tonic-gate case TT_SYSCALL: 20727c478bd9Sstevel@tonic-gate case TT_SYSENTER: 20737c478bd9Sstevel@tonic-gate case TT_SYSC: 20747c478bd9Sstevel@tonic-gate case TT_SYSC64: 20757c478bd9Sstevel@tonic-gate #if defined(__amd64) 20767c478bd9Sstevel@tonic-gate sys = &sysent32[rec->ttr_sysnum]; 20777c478bd9Sstevel@tonic-gate switch (rec->ttr_marker) { 20787c478bd9Sstevel@tonic-gate case TT_SYSC64: 20797c478bd9Sstevel@tonic-gate sys = &sysent[rec->ttr_sysnum]; 20807c478bd9Sstevel@tonic-gate /*FALLTHROUGH*/ 20817c478bd9Sstevel@tonic-gate #elif defined(__i386) 20827c478bd9Sstevel@tonic-gate sys = &sysent[rec->ttr_sysnum]; 20837c478bd9Sstevel@tonic-gate switch (rec->ttr_marker) { 20847c478bd9Sstevel@tonic-gate case TT_SYSC64: 20857c478bd9Sstevel@tonic-gate #endif 20867c478bd9Sstevel@tonic-gate case TT_SYSC: 20877c478bd9Sstevel@tonic-gate stype = "sysc"; /* syscall */ 20887c478bd9Sstevel@tonic-gate break; 20897c478bd9Sstevel@tonic-gate case TT_SYSCALL: 20907c478bd9Sstevel@tonic-gate stype = "lcal"; /* lcall */ 20917c478bd9Sstevel@tonic-gate break; 20927c478bd9Sstevel@tonic-gate case TT_SYSENTER: 20937c478bd9Sstevel@tonic-gate stype = "syse"; /* sysenter */ 20947c478bd9Sstevel@tonic-gate break; 20957c478bd9Sstevel@tonic-gate default: 20967c478bd9Sstevel@tonic-gate break; 20977c478bd9Sstevel@tonic-gate } 20987c478bd9Sstevel@tonic-gate printf(fmt2, "sysc", rec->ttr_sysnum); 20997c478bd9Sstevel@tonic-gate if (sys != NULL) { 21007c478bd9Sstevel@tonic-gate sym = kobj_getsymname( 21017c478bd9Sstevel@tonic-gate (uintptr_t)sys->sy_callc, 21027c478bd9Sstevel@tonic-gate &off); 21037c478bd9Sstevel@tonic-gate if (sym != NULL) 2104ae115bc7Smrj printf(fmt3, sym); 21057c478bd9Sstevel@tonic-gate else 21067c478bd9Sstevel@tonic-gate printf("%p ", sys->sy_callc); 21077c478bd9Sstevel@tonic-gate } else { 2108ae115bc7Smrj printf(fmt3, "unknown"); 21097c478bd9Sstevel@tonic-gate } 21107c478bd9Sstevel@tonic-gate break; 21117c478bd9Sstevel@tonic-gate 21127c478bd9Sstevel@tonic-gate case TT_INTERRUPT: 21137c478bd9Sstevel@tonic-gate printf(fmt2, "intr", rec->ttr_vector); 21147c478bd9Sstevel@tonic-gate vec = (&autovect[rec->ttr_vector])->avh_link; 21157c478bd9Sstevel@tonic-gate if (vec != NULL) { 21167c478bd9Sstevel@tonic-gate sym = kobj_getsymname( 21177c478bd9Sstevel@tonic-gate (uintptr_t)vec->av_vector, &off); 21187c478bd9Sstevel@tonic-gate if (sym != NULL) 2119ae115bc7Smrj printf(fmt3, sym); 21207c478bd9Sstevel@tonic-gate else 21217c478bd9Sstevel@tonic-gate printf("%p ", vec->av_vector); 21227c478bd9Sstevel@tonic-gate } else { 2123ae115bc7Smrj printf(fmt3, "unknown "); 21247c478bd9Sstevel@tonic-gate } 21257c478bd9Sstevel@tonic-gate break; 21267c478bd9Sstevel@tonic-gate 21277c478bd9Sstevel@tonic-gate case TT_TRAP: 2128ae115bc7Smrj case TT_EVENT: 21297c478bd9Sstevel@tonic-gate type = rec->ttr_regs.r_trapno; 21307c478bd9Sstevel@tonic-gate printf(fmt2, "trap", type); 2131ae115bc7Smrj if (type < TRAP_TYPES) 2132ae115bc7Smrj printf(" #%s ", 2133ae115bc7Smrj trap_type_mnemonic[type]); 2134ae115bc7Smrj else 2135ae115bc7Smrj switch (type) { 2136ae115bc7Smrj case T_AST: 2137ae115bc7Smrj printf(fmt3, "ast"); 2138ae115bc7Smrj break; 2139ae115bc7Smrj default: 2140ae115bc7Smrj printf(fmt3, ""); 2141ae115bc7Smrj break; 2142ae115bc7Smrj } 2143ae115bc7Smrj break; 2144ae115bc7Smrj 2145ae115bc7Smrj case TT_XCALL: 2146ae115bc7Smrj printf(fmt2, "xcal", 2147ae115bc7Smrj rec->ttr_info.xc_entry.xce_marker); 2148ae115bc7Smrj printf(fmt3, ""); 21497c478bd9Sstevel@tonic-gate break; 21507c478bd9Sstevel@tonic-gate 21517c478bd9Sstevel@tonic-gate default: 21527c478bd9Sstevel@tonic-gate break; 21537c478bd9Sstevel@tonic-gate } 21547c478bd9Sstevel@tonic-gate 21557c478bd9Sstevel@tonic-gate sym = kobj_getsymname(rec->ttr_regs.r_pc, &off); 21567c478bd9Sstevel@tonic-gate if (sym != NULL) 21577c478bd9Sstevel@tonic-gate printf("%s+%lx\n", sym, off); 21587c478bd9Sstevel@tonic-gate else 21597c478bd9Sstevel@tonic-gate printf("%lx\n", rec->ttr_regs.r_pc); 21607c478bd9Sstevel@tonic-gate 21617c478bd9Sstevel@tonic-gate if (ttrace_dump_nregs-- > 0) { 21627c478bd9Sstevel@tonic-gate int s; 21637c478bd9Sstevel@tonic-gate 21647c478bd9Sstevel@tonic-gate if (rec->ttr_marker == TT_INTERRUPT) 21657c478bd9Sstevel@tonic-gate printf( 21667c478bd9Sstevel@tonic-gate "\t\tipl %x spl %x pri %x\n", 21677c478bd9Sstevel@tonic-gate rec->ttr_ipl, 21687c478bd9Sstevel@tonic-gate rec->ttr_spl, 21697c478bd9Sstevel@tonic-gate rec->ttr_pri); 21707c478bd9Sstevel@tonic-gate 21717c478bd9Sstevel@tonic-gate dumpregs(&rec->ttr_regs); 21727c478bd9Sstevel@tonic-gate 21737c478bd9Sstevel@tonic-gate printf("\t%3s: %p\n\n", " ct", 21747c478bd9Sstevel@tonic-gate (void *)rec->ttr_curthread); 21757c478bd9Sstevel@tonic-gate 21767c478bd9Sstevel@tonic-gate /* 21777c478bd9Sstevel@tonic-gate * print out the pc stack that we recorded 21787c478bd9Sstevel@tonic-gate * at trap time (if any) 21797c478bd9Sstevel@tonic-gate */ 21807c478bd9Sstevel@tonic-gate for (s = 0; s < rec->ttr_sdepth; s++) { 21817c478bd9Sstevel@tonic-gate uintptr_t fullpc; 21827c478bd9Sstevel@tonic-gate 21837c478bd9Sstevel@tonic-gate if (s >= TTR_STACK_DEPTH) { 21847c478bd9Sstevel@tonic-gate printf("ttr_sdepth corrupt\n"); 21857c478bd9Sstevel@tonic-gate break; 21867c478bd9Sstevel@tonic-gate } 21877c478bd9Sstevel@tonic-gate 21887c478bd9Sstevel@tonic-gate fullpc = (uintptr_t)rec->ttr_stack[s]; 21897c478bd9Sstevel@tonic-gate 21907c478bd9Sstevel@tonic-gate sym = kobj_getsymname(fullpc, &off); 21917c478bd9Sstevel@tonic-gate if (sym != NULL) 21927c478bd9Sstevel@tonic-gate printf("-> %s+0x%lx()\n", 21937c478bd9Sstevel@tonic-gate sym, off); 21947c478bd9Sstevel@tonic-gate else 21957c478bd9Sstevel@tonic-gate printf("-> 0x%lx()\n", fullpc); 21967c478bd9Sstevel@tonic-gate } 21977c478bd9Sstevel@tonic-gate printf("\n"); 21987c478bd9Sstevel@tonic-gate } 21997c478bd9Sstevel@tonic-gate current -= sizeof (trap_trace_rec_t); 22007c478bd9Sstevel@tonic-gate } 22017c478bd9Sstevel@tonic-gate } 22027c478bd9Sstevel@tonic-gate } 22037c478bd9Sstevel@tonic-gate 2204ae115bc7Smrj /* 2205ae115bc7Smrj * Help with constructing traptrace records in C 2206ae115bc7Smrj */ 2207ae115bc7Smrj trap_trace_rec_t * 2208ae115bc7Smrj trap_trace_get_traceptr(uint8_t marker, ulong_t pc, ulong_t sp) 2209ae115bc7Smrj { 2210ae115bc7Smrj trap_trace_rec_t *ttr; 2211ae115bc7Smrj 2212ae115bc7Smrj if (trap_trace_freeze) 2213ae115bc7Smrj ttr = &trap_trace_postmort; 2214ae115bc7Smrj else { 2215ae115bc7Smrj trap_trace_ctl_t *ttc = &trap_trace_ctl[CPU->cpu_id]; 2216ae115bc7Smrj 2217ae115bc7Smrj ttr = (void *)ttc->ttc_next; 2218ae115bc7Smrj 2219ae115bc7Smrj if (ttc->ttc_next >= ttc->ttc_limit) 2220ae115bc7Smrj ttc->ttc_next = ttc->ttc_first; 2221ae115bc7Smrj else 2222ae115bc7Smrj ttc->ttc_next += sizeof (trap_trace_rec_t); 2223ae115bc7Smrj } 2224ae115bc7Smrj 2225ae115bc7Smrj ttr->ttr_regs.r_sp = sp; 2226ae115bc7Smrj ttr->ttr_regs.r_pc = pc; 2227ae115bc7Smrj ttr->ttr_cr2 = getcr2(); 2228ae115bc7Smrj ttr->ttr_curthread = (uintptr_t)curthread; 2229ae115bc7Smrj ttr->ttr_stamp = tsc_read(); 2230ae115bc7Smrj ttr->ttr_marker = marker; 2231ae115bc7Smrj return (ttr); 2232ae115bc7Smrj } 2233ae115bc7Smrj 22347c478bd9Sstevel@tonic-gate #endif /* TRAPTRACE */ 22357c478bd9Sstevel@tonic-gate 22367c478bd9Sstevel@tonic-gate void 2237843e1988Sjohnlev panic_showtrap(struct panic_trap_info *tip) 22387c478bd9Sstevel@tonic-gate { 22397c478bd9Sstevel@tonic-gate showregs(tip->trap_type, tip->trap_regs, tip->trap_addr); 22407c478bd9Sstevel@tonic-gate 22417c478bd9Sstevel@tonic-gate #if defined(TRAPTRACE) 22427c478bd9Sstevel@tonic-gate dump_ttrace(); 2243843e1988Sjohnlev #endif 22447c478bd9Sstevel@tonic-gate 2245843e1988Sjohnlev #if !defined(__xpv) 22467c478bd9Sstevel@tonic-gate if (tip->trap_type == T_DBLFLT) 22477c478bd9Sstevel@tonic-gate dump_tss(); 2248843e1988Sjohnlev #endif 22497c478bd9Sstevel@tonic-gate } 22507c478bd9Sstevel@tonic-gate 22517c478bd9Sstevel@tonic-gate void 2252843e1988Sjohnlev panic_savetrap(panic_data_t *pdp, struct panic_trap_info *tip) 22537c478bd9Sstevel@tonic-gate { 22547c478bd9Sstevel@tonic-gate panic_saveregs(pdp, tip->trap_regs); 22557c478bd9Sstevel@tonic-gate } 2256