1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_DEBUGREG_H
3 #define _ASM_X86_DEBUGREG_H
7 #include <uapi/asm/debugreg.h>
9 DECLARE_PER_CPU(unsigned long, cpu_dr7);
11 #ifndef CONFIG_PARAVIRT_XXL
13 * These special macros can be used to get or set a debugging register
15 #define get_debugreg(var, register) \
16 (var) = native_get_debugreg(register)
17 #define set_debugreg(value, register) \
18 native_set_debugreg(register, value)
21 static inline unsigned long native_get_debugreg(int regno)
23 unsigned long val = 0; /* Damn you, gcc! */
27 asm("mov %%db0, %0" :"=r" (val));
30 asm("mov %%db1, %0" :"=r" (val));
33 asm("mov %%db2, %0" :"=r" (val));
36 asm("mov %%db3, %0" :"=r" (val));
39 asm("mov %%db6, %0" :"=r" (val));
42 asm("mov %%db7, %0" :"=r" (val));
50 static inline void native_set_debugreg(int regno, unsigned long value)
54 asm("mov %0, %%db0" ::"r" (value));
57 asm("mov %0, %%db1" ::"r" (value));
60 asm("mov %0, %%db2" ::"r" (value));
63 asm("mov %0, %%db3" ::"r" (value));
66 asm("mov %0, %%db6" ::"r" (value));
69 asm("mov %0, %%db7" ::"r" (value));
76 static inline void hw_breakpoint_disable(void)
78 /* Zero the control register for HW Breakpoint */
81 /* Zero-out the individual HW breakpoint address registers */
88 static inline int hw_breakpoint_active(void)
90 return __this_cpu_read(cpu_dr7) & DR_GLOBAL_ENABLE_MASK;
93 extern void aout_dump_debugregs(struct user *dump);
95 extern void hw_breakpoint_restore(void);
98 DECLARE_PER_CPU(int, debug_stack_usage);
99 static inline void debug_stack_usage_inc(void)
101 __this_cpu_inc(debug_stack_usage);
103 static inline void debug_stack_usage_dec(void)
105 __this_cpu_dec(debug_stack_usage);
107 void debug_stack_set_zero(void);
108 void debug_stack_reset(void);
110 static inline void debug_stack_set_zero(void) { }
111 static inline void debug_stack_reset(void) { }
112 static inline void debug_stack_usage_inc(void) { }
113 static inline void debug_stack_usage_dec(void) { }
116 #ifdef CONFIG_CPU_SUP_AMD
117 extern void set_dr_addr_mask(unsigned long mask, int dr);
119 static inline void set_dr_addr_mask(unsigned long mask, int dr) { }
122 #endif /* _ASM_X86_DEBUGREG_H */