1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25/* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 26/* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 27/* All Rights Reserved */ 28 29/* Copyright (c) 1987, 1988 Microsoft Corporation */ 30/* All Rights Reserved */ 31 32#include <sys/asm_linkage.h> 33#include <sys/asm_misc.h> 34#include <sys/regset.h> 35#include <sys/psw.h> 36#include <sys/x86_archext.h> 37 38#if defined(__lint) 39 40#include <sys/types.h> 41#include <sys/thread.h> 42#include <sys/systm.h> 43 44#else /* __lint */ 45 46#include <sys/segments.h> 47#include <sys/pcb.h> 48#include <sys/trap.h> 49#include <sys/ftrace.h> 50#include <sys/traptrace.h> 51#include <sys/clock.h> 52#include <sys/panic.h> 53#include "assym.h" 54 55#endif /* lint */ 56 57#if defined(__lint) 58 59void 60_interrupt(void) 61{} 62 63#else /* __lint */ 64 65#if defined(__amd64) 66 67 /* 68 * Common register usage: 69 * 70 * %r12 trap trace pointer 71 */ 72 ENTRY_NP2(cmnint, _interrupt) 73 74 INTR_PUSH 75 INTGATE_INIT_KERNEL_FLAGS /* (set kernel rflags values) */ 76 77 /* 78 * At the end of TRACE_PTR %r12 points to the current TRAPTRACE entry 79 */ 80 TRACE_PTR(%r12, %rax, %eax, %rdx, $TT_INTERRUPT) 81 /* Uses labels 8 and 9 */ 82 TRACE_REGS(%r12, %rsp, %rax, %rbx) /* Uses label 9 */ 83 TRACE_STAMP(%r12) /* Clobbers %eax, %edx, uses 9 */ 84 85 movq %rsp, %rbp 86 87 TRACE_STACK(%r12) 88 89#ifdef TRAPTRACE 90 LOADCPU(%rbx) /* &cpu */ 91 movl CPU_PRI(%rbx), %r14d /* old ipl */ 92 movl $255, TTR_IPL(%r12) 93 movl %r14d, %edi 94 movb %dil, TTR_PRI(%r12) 95 movl CPU_BASE_SPL(%rbx), %edi 96 movb %dil, TTR_SPL(%r12) 97 movb $255, TTR_VECTOR(%r12) 98 movq %r12, %rsi /* pass traptrace record pointer */ 99#endif 100 101 movq %rsp, %rdi /* pass struct regs pointer */ 102 call *do_interrupt_common 103 104 jmp _sys_rtt_ints_disabled 105 /*NOTREACHED*/ 106 107 SET_SIZE(cmnint) 108 SET_SIZE(_interrupt) 109 110#elif defined(__i386) 111 112 ENTRY_NP2(cmnint, _interrupt) 113 114 INTR_PUSH 115 INTGATE_INIT_KERNEL_FLAGS 116 117 /* 118 * At the end of TRACE_PTR %esi points to the current TRAPTRACE entry 119 */ 120 TRACE_PTR(%esi, %eax, %eax, %edx, $TT_INTERRUPT) 121 /* Uses labels 8 and 9 */ 122 TRACE_REGS(%esi, %esp, %eax, %ebx) /* Uses label 9 */ 123 TRACE_STAMP(%esi) /* Clobbers %eax, %edx, uses 9 */ 124 125 movl %esp, %ebp 126 127 TRACE_STACK(%esi) 128 129 pushl %esi /* pass traptrace record pointer */ 130 pushl %ebp /* pass struct regs pointer */ 131 call *do_interrupt_common /* interrupt service routine */ 132 addl $8, %esp /* pop args off of stack */ 133 134 jmp _sys_rtt_ints_disabled 135 /*NOTREACHED*/ 136 137 SET_SIZE(cmnint) 138 SET_SIZE(_interrupt) 139 140#endif /* __i386 */ 141 142/* 143 * Declare a uintptr_t which has the size of _interrupt to enable stack 144 * traceback code to know when a regs structure is on the stack. 145 */ 146 .globl _interrupt_size 147 .align CLONGSIZE 148_interrupt_size: 149 .NWORD . - _interrupt 150 .type _interrupt_size, @object 151 152#endif /* __lint */ 153 154#if defined(__lint) 155 156void 157fakesoftint(void) 158{} 159 160#else /* __lint */ 161 162 / 163 / If we're here, we're being called from splx() to fake a soft 164 / interrupt (note that interrupts are still disabled from splx()). 165 / We execute this code when a soft interrupt is posted at 166 / level higher than the CPU's current spl; when spl is lowered in 167 / splx(), it will see the softint and jump here. We'll do exactly 168 / what a trap would do: push our flags, %cs, %eip, error code 169 / and trap number (T_SOFTINT). The cmnint() code will see T_SOFTINT 170 / and branch to the dosoftint() code. 171 / 172#if defined(__amd64) 173 174 /* 175 * In 64-bit mode, iretq -always- pops all five regs 176 * Imitate the 16-byte auto-align of the stack, and the 177 * zero-ed out %ss value. 178 */ 179 ENTRY_NP(fakesoftint) 180 movq %rsp, %r11 181 andq $-16, %rsp 182 pushq $KDS_SEL /* %ss */ 183 pushq %r11 /* %rsp */ 184 pushf /* rflags */ 185#if defined(__xpv) 186 popq %r11 187 EVENT_MASK_TO_IE(%rdi, %r11) 188 pushq %r11 189#endif 190 pushq $KCS_SEL /* %cs */ 191 leaq fakesoftint_return(%rip), %r11 192 pushq %r11 /* %rip */ 193 pushq $0 /* err */ 194 pushq $T_SOFTINT /* trap */ 195 jmp cmnint 196 ALTENTRY(fakesoftint_return) 197 ret 198 SET_SIZE(fakesoftint_return) 199 SET_SIZE(fakesoftint) 200 201#elif defined(__i386) 202 203 ENTRY_NP(fakesoftint) 204 pushfl 205#if defined(__xpv) 206 popl %eax 207 EVENT_MASK_TO_IE(%edx, %eax) 208 pushl %eax 209#endif 210 pushl %cs 211 pushl $fakesoftint_return 212 pushl $0 213 pushl $T_SOFTINT 214 jmp cmnint 215 ALTENTRY(fakesoftint_return) 216 ret 217 SET_SIZE(fakesoftint_return) 218 SET_SIZE(fakesoftint) 219 220#endif /* __i386 */ 221#endif /* __lint */ 222