f7809daf64
Instruction breakpoints need to have a specific length of 0 to be working. Bring this support but also take care the user is not trying to set an unsupported length, like a range breakpoint for example. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Prasad <prasad@linux.vnet.ibm.com> Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Jason Wessel <jason.wessel@windriver.com>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#ifndef _I386_HW_BREAKPOINT_H
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#define _I386_HW_BREAKPOINT_H
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#ifdef __KERNEL__
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#define __ARCH_HW_BREAKPOINT_H
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/*
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* The name should probably be something dealt in
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* a higher level. While dealing with the user
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* (display/resolving)
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*/
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struct arch_hw_breakpoint {
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unsigned long address;
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u8 len;
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u8 type;
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};
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#include <linux/kdebug.h>
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#include <linux/percpu.h>
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#include <linux/list.h>
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/* Available HW breakpoint length encodings */
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#define X86_BREAKPOINT_LEN_X 0x00
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#define X86_BREAKPOINT_LEN_1 0x40
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#define X86_BREAKPOINT_LEN_2 0x44
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#define X86_BREAKPOINT_LEN_4 0x4c
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#ifdef CONFIG_X86_64
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#define X86_BREAKPOINT_LEN_8 0x48
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#endif
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/* Available HW breakpoint type encodings */
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/* trigger on instruction execute */
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#define X86_BREAKPOINT_EXECUTE 0x80
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/* trigger on memory write */
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#define X86_BREAKPOINT_WRITE 0x81
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/* trigger on memory read or write */
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#define X86_BREAKPOINT_RW 0x83
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/* Total number of available HW breakpoint registers */
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#define HBP_NUM 4
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static inline int hw_breakpoint_slots(int type)
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{
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return HBP_NUM;
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}
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struct perf_event;
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struct pmu;
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extern int arch_check_bp_in_kernelspace(struct perf_event *bp);
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extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
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extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
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unsigned long val, void *data);
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int arch_install_hw_breakpoint(struct perf_event *bp);
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void arch_uninstall_hw_breakpoint(struct perf_event *bp);
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void hw_breakpoint_pmu_read(struct perf_event *bp);
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void hw_breakpoint_pmu_unthrottle(struct perf_event *bp);
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extern void
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arch_fill_perf_breakpoint(struct perf_event *bp);
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unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type);
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int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type);
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extern int arch_bp_generic_fields(int x86_len, int x86_type,
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int *gen_len, int *gen_type);
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extern struct pmu perf_ops_bp;
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#endif /* __KERNEL__ */
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#endif /* _I386_HW_BREAKPOINT_H */
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