osfmk/i386/trap.h

   1 /*
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  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990 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.
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  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  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
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  55  */
  56 /*
  57  */
  58
  59 #ifndef _I386_TRAP_H_
  60 #define _I386_TRAP_H_
  61
  62 /*
  63  * Hardware trap vectors for i386.
  64  */
  65 #define T_DIVIDE_ERROR          0
  66 #define T_DEBUG                 1
  67 #define T_NMI                   2               /* non-maskable interrupt */
  68 #define T_INT3                  3               /* int 3 instruction */
  69 #define T_OVERFLOW              4               /* overflow test */
  70 #define T_OUT_OF_BOUNDS         5               /* bounds check */
  71 #define T_INVALID_OPCODE        6               /* invalid op code */
  72 #define T_NO_FPU                7               /* no floating point */
  73 #define T_DOUBLE_FAULT          8               /* double fault */
  74 #define T_FPU_FAULT             9
  75 #define T_INVALID_TSS           10
  76 #define T_SEGMENT_NOT_PRESENT   11
  77 #define T_STACK_FAULT           12
  78 #define T_GENERAL_PROTECTION    13
  79 #define T_PAGE_FAULT            14
  80 /*                              15 */
  81 #define T_FLOATING_POINT_ERROR  16
  82 #define T_WATCHPOINT            17
  83 #define T_MACHINE_CHECK         18
  84 #define T_SSE_FLOAT_ERROR       19
  85 /*                          20-126 */
  86 #define T_DTRACE_RET            127
  87
  88 /* The SYSENTER and SYSCALL trap numbers are software constructs.
  89  * These exceptions are dispatched directly to the system call handlers.
  90  * See also the "software interrupt codes" section of
  91  * osfmk/mach/i386/syscall_sw.h
  92  */
  93 #define T_SYSENTER              0x84
  94 #define T_SYSCALL               0x85
  95
  96 #define T_PREEMPT               255
  97
  98 #define TRAP_NAMES "divide error", "debug trap", "NMI", "breakpoint", \
  99                    "overflow", "bounds check", "invalid opcode", \
 100                    "no coprocessor", "double fault", "coprocessor overrun", \
 101                    "invalid TSS", "segment not present", "stack bounds", \
 102                    "general protection", "page fault", "(reserved)", \
 103                    "coprocessor error", "watchpoint", "machine check", "SSE floating point"
 104
 105 /*
 106  * Page-fault trap codes.
 107  */
 108 #define T_PF_PROT               0x1             /* protection violation */
 109 #define T_PF_WRITE              0x2             /* write access */
 110 #define T_PF_USER               0x4             /* from user state */
 111
 112 #define T_PF_RSVD               0x8             /* reserved bit set to 1 */
 113 #define T_PF_EXECUTE            0x10            /* instruction fetch when NX */
 114
 115 #if !defined(ASSEMBLER) && defined(MACH_KERNEL)
 116
 117 #include <i386/thread.h>
 118
 119 extern void             i386_exception(
 120                                 int                     exc,
 121                                 mach_exception_code_t   code,
 122                                 mach_exception_subcode_t subcode);
 123
 124 extern void             sync_iss_to_iks(x86_saved_state_t *regs);
 125
 126 extern void             sync_iss_to_iks_unconditionally(
 127                                 x86_saved_state_t       *regs);
 128
 129 extern void             kernel_trap(x86_saved_state_t *regs, uintptr_t *lo_spp);
 130
 131 extern void             user_trap(x86_saved_state_t *regs);
 132
 133 extern void             interrupt(x86_saved_state_t *regs);
 134
 135 extern void             panic_double_fault64(x86_saved_state_t *regs);
 136 extern void             panic_machine_check64(x86_saved_state_t *regs);
 137
 138 extern void             i386_astintr(int preemption);
 139
 140
 141 typedef kern_return_t (*perfCallback)(
 142                                 int                     trapno,
 143                                 void                    *regs,
 144                                 uintptr_t               *lo_spp,
 145                                       int);
 146
 147 typedef kern_return_t (*perfASTCallback)(ast_t reasons, ast_t *myast);
 148
 149 extern volatile perfCallback perfTrapHook;
 150 extern volatile perfASTCallback perfASTHook;
 151 extern volatile perfCallback perfIntHook;
 152
 153 extern void             panic_i386_backtrace(void *, int, const char *, boolean_t, x86_saved_state_t *);
 154 #if MACH_KDP
 155 extern boolean_t        kdp_i386_trap(
 156                                 unsigned int,
 157                                 x86_saved_state64_t *,
 158                                 kern_return_t,
 159                                 vm_offset_t);
 160 #endif /* MACH_KDP */
 161 #endif  /* !ASSEMBLER && MACH_KERNEL */
 162
 163 #endif  /* _I386_TRAP_H_ */