#ifndef _ASM_X86_DEBUGREG_H#define _ASM_X86_DEBUGREG_H  #include <linux/bug.h>#include <uapi/asm/debugreg.h> DECLARE_PER_CPU(unsigned long, cpu_dr7); #ifndef CONFIG_PARAVIRT/* * These special macros can be used to get or set a debugging register */#define get_debugreg(var, register)				\	(var) = native_get_debugreg(register)#define set_debugreg(value, register)				\	native_set_debugreg(register, value)#endif static inline unsigned long native_get_debugreg(int regno){	unsigned long val = 0;	/* Damn you, gcc! */ 	switch (regno) {	case 0:		asm("mov %%db0, %0" :"=r" (val));		break;	case 1:		asm("mov %%db1, %0" :"=r" (val));		break;	case 2:		asm("mov %%db2, %0" :"=r" (val));		break;	case 3:		asm("mov %%db3, %0" :"=r" (val));		break;	case 6:		asm("mov %%db6, %0" :"=r" (val));		break;	case 7:		asm("mov %%db7, %0" :"=r" (val));		break;	default:		BUG();	}	return val;} static inline void native_set_debugreg(int regno, unsigned long value){	switch (regno) {	case 0:		asm("mov %0, %%db0"	::"r" (value));		break;	case 1:		asm("mov %0, %%db1"	::"r" (value));		break;	case 2:		asm("mov %0, %%db2"	::"r" (value));		break;	case 3:		asm("mov %0, %%db3"	::"r" (value));		break;	case 6:		asm("mov %0, %%db6"	::"r" (value));		break;	case 7:		asm("mov %0, %%db7"	::"r" (value));		break;	default:		BUG();	}} static inline void hw_breakpoint_disable(void){	/* Zero the control register for HW Breakpoint */	set_debugreg(0UL, 7); 	/* Zero-out the individual HW breakpoint address registers */	set_debugreg(0UL, 0);	set_debugreg(0UL, 1);	set_debugreg(0UL, 2);	set_debugreg(0UL, 3);} static inline int hw_breakpoint_active(void){	return __this_cpu_read(cpu_dr7) & DR_GLOBAL_ENABLE_MASK;} extern void aout_dump_debugregs(struct user *dump); extern void hw_breakpoint_restore(void); #ifdef CONFIG_X86_64DECLARE_PER_CPU(int, debug_stack_usage);static inline void debug_stack_usage_inc(void){	__get_cpu_var(debug_stack_usage)++;}static inline void debug_stack_usage_dec(void){	__get_cpu_var(debug_stack_usage)--;}int is_debug_stack(unsigned long addr);void debug_stack_set_zero(void);void debug_stack_reset(void);#else /* !X86_64 */static inline int is_debug_stack(unsigned long addr) { return 0; }static inline void debug_stack_set_zero(void) { }static inline void debug_stack_reset(void) { }static inline void debug_stack_usage_inc(void) { }static inline void debug_stack_usage_dec(void) { }#endif /* X86_64 */  #endif /* _ASM_X86_DEBUGREG_H */