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 <stddef.h>
  33 #include <stdint.h>
  34
  35 void exception_init_asm(void);
  36 void exception_dispatch(void);
  37 void enable_interrupts(void);
  38 void disable_interrupts(void);
  39 /** Returns 1 if interrupts are enabled. */
  40 int interrupts_enabled(void);
  41
  42 #if CONFIG(LP_ARCH_X86_64)
  43 struct exception_state {
  44         /* Careful: x86/gdb.c currently relies on the size and order of regs. */
  45         struct {
  46                 size_t reg_ax;
  47                 size_t reg_bx;
  48                 size_t reg_cx;
  49                 size_t reg_dx;
  50                 size_t reg_si;
  51                 size_t reg_di;
  52                 size_t reg_bp;
  53                 size_t reg_sp;
  54                 size_t reg_r8;
  55                 size_t reg_r9;
  56                 size_t reg_r10;
  57                 size_t reg_r11;
  58                 size_t reg_r12;
  59                 size_t reg_r13;
  60                 size_t reg_r14;
  61                 size_t reg_r15;
  62                 size_t reg_ip;
  63                 size_t reg_flags;
  64                 u32 cs;
  65                 u32 ss;
  66                 u32 ds;
  67                 u32 es;
  68                 u32 fs;
  69                 u32 gs;
  70         } regs;
  71         size_t error_code;
  72         size_t vector;
  73 } __packed;
  74 #else
  75 struct exception_state {
  76         /* Careful: x86/gdb.c currently relies on the size and order of regs. */
  77         struct {
  78                 size_t reg_ax;
  79                 size_t reg_cx;
  80                 size_t reg_dx;
  81                 size_t reg_bx;
  82                 size_t reg_sp;
  83                 size_t reg_bp;
  84                 size_t reg_si;
  85                 size_t reg_di;
  86                 size_t reg_ip;
  87                 size_t reg_flags;
  88                 u32 cs;
  89                 u32 ss;
  90                 u32 ds;
  91                 u32 es;
  92                 u32 fs;
  93                 u32 gs;
  94         } regs;
  95         size_t error_code;
  96         size_t vector;
  97 } __packed;
  98 #endif
  99
 100 extern struct exception_state *exception_state;
 101
 102 extern u8 exception_stack[];
 103 extern u8 *exception_stack_end;
 104
 105 enum {
 106         EXC_DE = 0, /* Divide by zero */
 107         EXC_DB = 1, /* Debug */
 108         EXC_NMI = 2, /* Non maskable interrupt */
 109         EXC_BP = 3, /* Breakpoint */
 110         EXC_OF = 4, /* Overflow */
 111         EXC_BR = 5, /* Bound range */
 112         EXC_UD = 6, /* Invalid opcode */
 113         EXC_NM = 7, /* Device not available */
 114         EXC_DF = 8, /* Double fault */
 115         EXC_TS = 10, /* Invalid TSS */
 116         EXC_NP = 11, /* Segment not present */
 117         EXC_SS = 12, /* Stack */
 118         EXC_GP = 13, /* General protection */
 119         EXC_PF = 14, /* Page fault */
 120         EXC_MF = 16, /* x87 floating point */
 121         EXC_AC = 17, /* Alignment check */
 122         EXC_MC = 18, /* Machine check */
 123         EXC_XF = 19, /* SIMD floating point */
 124         EXC_SX = 30, /* Security */
 125         EXC_COUNT
 126 };
 127
 128 #endif