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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/xtensa/include/asm/hw_breakpoint.h
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/*

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 * Xtensa hardware breakpoints/watchpoints handling functions

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 *

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 * This file is subject to the terms and conditions of the GNU General Public

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 * License.  See the file "COPYING" in the main directory of this archive

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 * for more details.

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 *

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 * Copyright (C) 2016 Cadence Design Systems Inc.

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 */

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#ifndef __ASM_XTENSA_HW_BREAKPOINT_H

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#define __ASM_XTENSA_HW_BREAKPOINT_H

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#ifdef CONFIG_HAVE_HW_BREAKPOINT

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#include <linux/kdebug.h>

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#include <linux/types.h>

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#include <uapi/linux/hw_breakpoint.h>

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/* Breakpoint */

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#define XTENSA_BREAKPOINT_EXECUTE	0

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/* Watchpoints */

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#define XTENSA_BREAKPOINT_LOAD		1

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#define XTENSA_BREAKPOINT_STORE		2

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struct arch_hw_breakpoint {

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	unsigned long address;

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	u16 len;

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	u16 type;

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};

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struct perf_event_attr;

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struct perf_event;

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struct pt_regs;

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struct task_struct;

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int hw_breakpoint_slots(int type);

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int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);

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int hw_breakpoint_arch_parse(struct perf_event *bp,

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			     const struct perf_event_attr *attr,

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			     struct arch_hw_breakpoint *hw);

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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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int check_hw_breakpoint(struct pt_regs *regs);

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void clear_ptrace_hw_breakpoint(struct task_struct *tsk);

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void restore_dbreak(void);

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#else

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struct task_struct;

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static inline void clear_ptrace_hw_breakpoint(struct task_struct *tsk)

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{

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}

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#endif /* CONFIG_HAVE_HW_BREAKPOINT */

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#endif /* __ASM_XTENSA_HW_BREAKPOINT_H */

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