1 /*
2 * Copyright (c) 2009-2012 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28 /*
29 * @OSF_COPYRIGHT@
30 */
31 /*
32 * Mach Operating System
33 * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
34 * All Rights Reserved.
35 *
36 * Permission to use, copy, modify and distribute this software and its
37 * documentation is hereby granted, provided that both the copyright
38 * notice and this permission notice appear in all copies of the
39 * software, derivative works or modified versions, and any portions
40 * thereof, and that both notices appear in supporting documentation.
41 *
42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
45 *
46 * Carnegie Mellon requests users of this software to return to
47 *
48 * Software Distribution Coordinator or [email protected]
49 * School of Computer Science
50 * Carnegie Mellon University
51 * Pittsburgh PA 15213-3890
52 *
53 * any improvements or extensions that they make and grant Carnegie Mellon
54 * the rights to redistribute these changes.
55 */
56 /*
57 */
58
59 /*
60 * Hardware trap/fault handler.
61 */
62
63 #include <types.h>
64 #include <i386/eflags.h>
65 #include <i386/trap.h>
66 #include <i386/pmap.h>
67 #include <i386/fpu.h>
68 #include <i386/panic_notify.h>
69
70 #include <mach/exception.h>
71 #include <mach/kern_return.h>
72 #include <mach/vm_param.h>
73 #include <mach/i386/thread_status.h>
74
75 #include <kern/kern_types.h>
76 #include <kern/processor.h>
77 #include <kern/thread.h>
78 #include <kern/task.h>
79 #include <kern/sched.h>
80 #include <kern/sched_prim.h>
81 #include <kern/exception.h>
82 #include <kern/spl.h>
83 #include <kern/misc_protos.h>
84 #include <kern/debug.h>
85
86 #include <sys/kdebug.h>
87
88 #include <string.h>
89
90 #include <i386/postcode.h>
91 #include <i386/mp_desc.h>
92 #include <i386/proc_reg.h>
93 #if CONFIG_MCA
94 #include <i386/machine_check.h>
95 #endif
96 #include <mach/i386/syscall_sw.h>
97
98 #include <machine/pal_routines.h>
99 #include <libkern/OSAtomic.h>
100
101 extern void kprintf_break_lock(void);
102 extern void kprint_state(x86_saved_state64_t *saved_state);
103
104 extern volatile int panic_double_fault_cpu;
105
106
107 #if defined(__x86_64__) && DEBUG
108 /*
109 * K64 debug - fatal handler for debug code in the trap vectors.
110 */
111 extern void __dead2
112 panic_idt64(x86_saved_state_t *rsp);
113 void
panic_idt64(x86_saved_state_t * rsp)114 panic_idt64(x86_saved_state_t *rsp)
115 {
116 kprint_state(saved_state64(rsp));
117 panic("panic_idt64");
118 }
119 #endif
120
121
122 __dead2
123 static void
panic_64(x86_saved_state_t * sp,__unused int pc,__unused const char * msg,boolean_t do_mca_dump)124 panic_64(x86_saved_state_t *sp, __unused int pc, __unused const char *msg, boolean_t do_mca_dump)
125 {
126 /* Set postcode (DEBUG only) */
127 postcode(pc);
128
129 /*
130 * Issue an I/O port read if one has been requested - this is an
131 * event logic analyzers can use as a trigger point.
132 */
133 panic_notify();
134
135
136 /*
137 * Break kprintf lock in case of recursion,
138 * and record originally faulted instruction address.
139 */
140 kprintf_break_lock();
141
142 if (do_mca_dump) {
143 #if CONFIG_MCA
144 /*
145 * Dump the contents of the machine check MSRs (if any).
146 */
147 mca_dump();
148 #endif
149 }
150
151 x86_saved_state64_t *regs = saved_state64(sp);
152 panic("%s at 0x%016llx, registers:\n"
153 "CR0: 0x%016lx, CR2: 0x%016lx, CR3: 0x%016lx, CR4: 0x%016lx\n"
154 "RAX: 0x%016llx, RBX: 0x%016llx, RCX: 0x%016llx, RDX: 0x%016llx\n"
155 "RSP: 0x%016llx, RBP: 0x%016llx, RSI: 0x%016llx, RDI: 0x%016llx\n"
156 "R8: 0x%016llx, R9: 0x%016llx, R10: 0x%016llx, R11: 0x%016llx\n"
157 "R12: 0x%016llx, R13: 0x%016llx, R14: 0x%016llx, R15: 0x%016llx\n"
158 "RFL: 0x%016llx, RIP: 0x%016llx, CS: 0x%016llx, SS: 0x%016llx\n"
159 "Error code: 0x%016llx%s\n",
160 msg,
161 regs->isf.rip,
162 get_cr0(), get_cr2(), get_cr3_raw(), get_cr4(),
163 regs->rax, regs->rbx, regs->rcx, regs->rdx,
164 regs->isf.rsp, regs->rbp, regs->rsi, regs->rdi,
165 regs->r8, regs->r9, regs->r10, regs->r11,
166 regs->r12, regs->r13, regs->r14, regs->r15,
167 regs->isf.rflags, regs->isf.rip, regs->isf.cs & 0xFFFF, regs->isf.ss & 0xFFFF,
168 regs->isf.err, virtualized ? " VMM" : "");
169 }
170
171 void
panic_double_fault64(x86_saved_state_t * sp)172 panic_double_fault64(x86_saved_state_t *sp)
173 {
174 #if DEVELOPMENT || DEBUG
175 uint64_t frameptr = is_saved_state64(sp) ? saved_state64(sp)->rbp : saved_state32(sp)->ebp;
176 (void) traptrace_start(T_DOUBLE_FAULT, saved_state64(sp)->isf.rip, mach_absolute_time(), frameptr);
177 #endif
178 (void)OSCompareAndSwap((UInt32) - 1, (UInt32) cpu_number(), (volatile UInt32 *)&panic_double_fault_cpu);
179 panic_64(sp, PANIC_DOUBLE_FAULT, "Double fault", FALSE);
180 }
181 void
panic_machine_check64(x86_saved_state_t * sp)182 panic_machine_check64(x86_saved_state_t *sp)
183 {
184 #if DEVELOPMENT || DEBUG
185 uint64_t frameptr = is_saved_state64(sp) ? saved_state64(sp)->rbp : saved_state32(sp)->ebp;
186 (void) traptrace_start(T_MACHINE_CHECK, saved_state64(sp)->isf.rip, mach_absolute_time(), frameptr);
187 #endif
188 panic_64(sp, PANIC_MACHINE_CHECK, "Machine Check", TRUE);
189 }
190