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/*
* This file is part of the libpayload project.
*
* Copyright 2013 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ARCH_EXCEPTION_H
#define _ARCH_EXCEPTION_H
#include <stdint.h>
void exception_init_asm(void);
void exception_dispatch(void);
void enable_interrupts(void);
void disable_interrupts(void);
/** Returns 1 if interrupts are enabled. */
int interrupts_enabled(void);
struct exception_state
{
/* Careful: x86/gdb.c currently relies on the size and order of regs. */
struct {
u32 eax;
u32 ecx;
u32 edx;
u32 ebx;
u32 esp;
u32 ebp;
u32 esi;
u32 edi;
u32 eip;
u32 eflags;
u32 cs;
u32 ss;
u32 ds;
u32 es;
u32 fs;
u32 gs;
} regs;
u32 error_code;
u32 vector;
} __packed;
extern struct exception_state *exception_state;
extern u32 exception_stack[];
extern u32 *exception_stack_end;
enum {
EXC_DE = 0, /* Divide by zero */
EXC_DB = 1, /* Debug */
EXC_NMI = 2, /* Non maskable interrupt */
EXC_BP = 3, /* Breakpoint */
EXC_OF = 4, /* Overflow */
EXC_BR = 5, /* Bound range */
EXC_UD = 6, /* Invalid opcode */
EXC_NM = 7, /* Device not available */
EXC_DF = 8, /* Double fault */
EXC_TS = 10, /* Invalid TSS */
EXC_NP = 11, /* Segment not present */
EXC_SS = 12, /* Stack */
EXC_GP = 13, /* General protection */
EXC_PF = 14, /* Page fault */
EXC_MF = 16, /* x87 floating point */
EXC_AC = 17, /* Alignment check */
EXC_MC = 18, /* Machine check */
EXC_XF = 19, /* SIMD floating point */
EXC_SX = 30, /* Security */
EXC_COUNT
};
#endif
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