payloads/libpayload/include/x86/arch/exception.h

   1 /*
   2  * This file is part of the libpayload project.
   3  *
   4  * Copyright 2013 Google Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef _ARCH_EXCEPTION_H
  31 #define _ARCH_EXCEPTION_H
  32
  33 #include <stdint.h>
  34
  35 void exception_init_asm(void);
  36 void exception_dispatch(void);
  37
  38 struct exception_state
  39 {
  40         /* Careful: x86/gdb.c currently relies on the size and order of regs. */
  41         struct {
  42                 u32 eax;
  43                 u32 ecx;
  44                 u32 edx;
  45                 u32 ebx;
  46                 u32 esp;
  47                 u32 ebp;
  48                 u32 esi;
  49                 u32 edi;
  50                 u32 eip;
  51                 u32 eflags;
  52                 u32 cs;
  53                 u32 ss;
  54                 u32 ds;
  55                 u32 es;
  56                 u32 fs;
  57                 u32 gs;
  58         } regs;
  59         u32 error_code;
  60         u32 vector;
  61 } __packed;
  62 extern struct exception_state *exception_state;
  63
  64 extern u32 exception_stack[];
  65 extern u32 *exception_stack_end;
  66
  67 enum {
  68         EXC_DE = 0, /* Divide by zero */
  69         EXC_DB = 1, /* Debug */
  70         EXC_NMI = 2, /* Non maskable interrupt */
  71         EXC_BP = 3, /* Breakpoint */
  72         EXC_OF = 4, /* Overflow */
  73         EXC_BR = 5, /* Bound range */
  74         EXC_UD = 6, /* Invalid opcode */
  75         EXC_NM = 7, /* Device not available */
  76         EXC_DF = 8, /* Double fault */
  77         EXC_TS = 10, /* Invalid TSS */
  78         EXC_NP = 11, /* Segment not present */
  79         EXC_SS = 12, /* Stack */
  80         EXC_GP = 13, /* General protection */
  81         EXC_PF = 14, /* Page fault */
  82         EXC_MF = 16, /* x87 floating point */
  83         EXC_AC = 17, /* Alignment check */
  84         EXC_MC = 18, /* Machine check */
  85         EXC_XF = 19, /* SIMD floating point */
  86         EXC_SX = 30, /* Security */
  87         EXC_COUNT
  88 };
  89
  90 #endif