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

   1 /*
   2  *
   3  * Copyright 2013 Google Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #ifndef _ARCH_EXCEPTION_H
  30 #define _ARCH_EXCEPTION_H
  31
  32 #include <stdint.h>
  33
  34 void exception_init_asm(void);
  35 void exception_dispatch(void);
  36 void enable_interrupts(void);
  37 void disable_interrupts(void);
  38 /** Returns 1 if interrupts are enabled. */
  39 int interrupts_enabled(void);
  40
  41 struct exception_state
  42 {
  43         /* Careful: x86/gdb.c currently relies on the size and order of regs. */
  44         struct {
  45                 u32 eax;
  46                 u32 ecx;
  47                 u32 edx;
  48                 u32 ebx;
  49                 u32 esp;
  50                 u32 ebp;
  51                 u32 esi;
  52                 u32 edi;
  53                 u32 eip;
  54                 u32 eflags;
  55                 u32 cs;
  56                 u32 ss;
  57                 u32 ds;
  58                 u32 es;
  59                 u32 fs;
  60                 u32 gs;
  61         } regs;
  62         u32 error_code;
  63         u32 vector;
  64 } __packed;
  65 extern struct exception_state *exception_state;
  66
  67 extern u32 exception_stack[];
  68 extern u32 *exception_stack_end;
  69
  70 enum {
  71         EXC_DE = 0, /* Divide by zero */
  72         EXC_DB = 1, /* Debug */
  73         EXC_NMI = 2, /* Non maskable interrupt */
  74         EXC_BP = 3, /* Breakpoint */
  75         EXC_OF = 4, /* Overflow */
  76         EXC_BR = 5, /* Bound range */
  77         EXC_UD = 6, /* Invalid opcode */
  78         EXC_NM = 7, /* Device not available */
  79         EXC_DF = 8, /* Double fault */
  80         EXC_TS = 10, /* Invalid TSS */
  81         EXC_NP = 11, /* Segment not present */
  82         EXC_SS = 12, /* Stack */
  83         EXC_GP = 13, /* General protection */
  84         EXC_PF = 14, /* Page fault */
  85         EXC_MF = 16, /* x87 floating point */
  86         EXC_AC = 17, /* Alignment check */
  87         EXC_MC = 18, /* Machine check */
  88         EXC_XF = 19, /* SIMD floating point */
  89         EXC_SX = 30, /* Security */
  90         EXC_COUNT
  91 };
  92
  93 #endif