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 char *name; /* Contains name of the symbol to set bkpt */ 14 unsigned long address; 15 u8 len; 16 u8 type; 17 }; 18 19 #include <linux/kdebug.h> 20 #include <linux/percpu.h> 21 #include <linux/list.h> 22 23 /* Available HW breakpoint length encodings */ 24 #define X86_BREAKPOINT_LEN_1 0x40 25 #define X86_BREAKPOINT_LEN_2 0x44 26 #define X86_BREAKPOINT_LEN_4 0x4c 27 #define X86_BREAKPOINT_LEN_EXECUTE 0x40 28 29 #ifdef CONFIG_X86_64 30 #define X86_BREAKPOINT_LEN_8 0x48 31 #endif 32 33 /* Available HW breakpoint type encodings */ 34 35 /* trigger on instruction execute */ 36 #define X86_BREAKPOINT_EXECUTE 0x80 37 /* trigger on memory write */ 38 #define X86_BREAKPOINT_WRITE 0x81 39 /* trigger on memory read or write */ 40 #define X86_BREAKPOINT_RW 0x83 41 42 /* Total number of available HW breakpoint registers */ 43 #define HBP_NUM 4 44 45 struct perf_event; 46 struct pmu; 47 48 extern int arch_check_va_in_userspace(unsigned long va, u8 hbp_len); 49 extern int arch_validate_hwbkpt_settings(struct perf_event *bp, 50 struct task_struct *tsk); 51 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 52 unsigned long val, void *data); 53 54 55 int arch_install_hw_breakpoint(struct perf_event *bp); 56 void arch_uninstall_hw_breakpoint(struct perf_event *bp); 57 void hw_breakpoint_pmu_read(struct perf_event *bp); 58 void hw_breakpoint_pmu_unthrottle(struct perf_event *bp); 59 60 extern void 61 arch_fill_perf_breakpoint(struct perf_event *bp); 62 63 unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type); 64 int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type); 65 66 extern int arch_bp_generic_fields(int x86_len, int x86_type, 67 int *gen_len, int *gen_type); 68 69 extern struct pmu perf_ops_bp; 70 71 #endif /* __KERNEL__ */ 72 #endif /* _I386_HW_BREAKPOINT_H */ 73 74