1 #ifndef _I386_HW_BREAKPOINT_H 2 #define _I386_HW_BREAKPOINT_H 3 4 #ifdef __KERNEL__ 5 #define __ARCH_HW_BREAKPOINT_H 6 7 /* 8 * The name should probably be something dealt in 9 * a higher level. While dealing with the user 10 * (display/resolving) 11 */ 12 struct arch_hw_breakpoint { 13 unsigned long address; 14 u8 len; 15 u8 type; 16 }; 17 18 #include <linux/kdebug.h> 19 #include <linux/percpu.h> 20 #include <linux/list.h> 21 22 /* Available HW breakpoint length encodings */ 23 #define X86_BREAKPOINT_LEN_1 0x40 24 #define X86_BREAKPOINT_LEN_2 0x44 25 #define X86_BREAKPOINT_LEN_4 0x4c 26 #define X86_BREAKPOINT_LEN_EXECUTE 0x40 27 28 #ifdef CONFIG_X86_64 29 #define X86_BREAKPOINT_LEN_8 0x48 30 #endif 31 32 /* Available HW breakpoint type encodings */ 33 34 /* trigger on instruction execute */ 35 #define X86_BREAKPOINT_EXECUTE 0x80 36 /* trigger on memory write */ 37 #define X86_BREAKPOINT_WRITE 0x81 38 /* trigger on memory read or write */ 39 #define X86_BREAKPOINT_RW 0x83 40 41 /* Total number of available HW breakpoint registers */ 42 #define HBP_NUM 4 43 44 struct perf_event; 45 struct pmu; 46 47 extern int arch_check_va_in_userspace(unsigned long va, u8 hbp_len); 48 extern int arch_validate_hwbkpt_settings(struct perf_event *bp, 49 struct task_struct *tsk); 50 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 51 unsigned long val, void *data); 52 53 54 int arch_install_hw_breakpoint(struct perf_event *bp); 55 void arch_uninstall_hw_breakpoint(struct perf_event *bp); 56 void hw_breakpoint_pmu_read(struct perf_event *bp); 57 void hw_breakpoint_pmu_unthrottle(struct perf_event *bp); 58 59 extern void 60 arch_fill_perf_breakpoint(struct perf_event *bp); 61 62 unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type); 63 int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type); 64 65 extern int arch_bp_generic_fields(int x86_len, int x86_type, 66 int *gen_len, int *gen_type); 67 68 extern struct pmu perf_ops_bp; 69 70 #endif /* __KERNEL__ */ 71 #endif /* _I386_HW_BREAKPOINT_H */ 72 73