xen/arch/i386/traps.c


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/******************************************************************************
 * arch/i386/traps.c
 * 
 * Modifications to Linux original are copyright (c) 2002-2003, K A Fraser
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 *  xen/arch/i386/traps.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  Pentium III FXSR, SSE support
 *	Gareth Hughes <gareth@valinux.com>, May 2000
 */

#include <xeno/config.h>
#include <xeno/init.h>
#include <xeno/interrupt.h>
#include <xeno/sched.h>
#include <xeno/lib.h>
#include <xeno/errno.h>
#include <xeno/mm.h>
#include <asm/ptrace.h>
#include <xeno/delay.h>
#include <xeno/spinlock.h>
#include <xeno/irq.h>
#include <xeno/perfc.h>
#include <asm/domain_page.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/desc.h>
#include <asm/debugreg.h>
#include <asm/smp.h>
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <asm/i387.h>

#define GTBF_TRAP        1
#define GTBF_TRAP_NOCODE 2
#define GTBF_TRAP_CR2    4
struct guest_trap_bounce {
    unsigned long  error_code;        /*   0 */
    unsigned long  cr2;               /*   4 */
    unsigned short flags;             /*   8 */
    unsigned short cs;                /*  10 */
    unsigned long  eip;               /*  12 */
} guest_trap_bounce[NR_CPUS] = { { 0 } };

#define DOUBLEFAULT_STACK_SIZE 1024
static struct tss_struct doublefault_tss;
static unsigned char doublefault_stack[DOUBLEFAULT_STACK_SIZE];

asmlinkage int hypervisor_call(void);
asmlinkage void lcall7(void);
asmlinkage void lcall27(void);

/* Master table, and the one used by CPU0. */
struct desc_struct idt_table[256] = { {0, 0}, };
/* All other CPUs have their own copy. */
struct desc_struct *idt_tables[NR_CPUS] = { 0 };

asmlinkage void divide_error(void);
asmlinkage void debug(void);
asmlinkage void nmi(void);
asmlinkage void int3(void);
asmlinkage void overflow(void);
asmlinkage void bounds(void);
asmlinkage void invalid_op(void);
asmlinkage void device_not_available(void);
asmlinkage void coprocessor_segment_overrun(void);
asmlinkage void invalid_TSS(void);
asmlinkage void segment_not_present(void);
asmlinkage void stack_segment(void);
asmlinkage void general_protection(void);
asmlinkage void page_fault(void);
asmlinkage void coprocessor_error(void);
asmlinkage void simd_coprocessor_error(void);
asmlinkage void alignment_check(void);
asmlinkage void spurious_interrupt_bug(void);
asmlinkage void machine_check(void);

int kstack_depth_to_print = 8*20;

static inline int kernel_text_address(unsigned long addr)
{
    if (addr >= (unsigned long) &_stext &&