687b16fb61
If an arch doesn't support the hw breakpoints, counter_arch_bp() has no off case to cover the missing breakpoint info structure from the perf event. The result is a build error in non-x86 configs. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <1258114575-32655-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Prasad <prasad@linux.vnet.ibm.com>
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
#ifndef _LINUX_HW_BREAKPOINT_H
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#define _LINUX_HW_BREAKPOINT_H
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#include <linux/perf_event.h>
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enum {
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HW_BREAKPOINT_LEN_1 = 1,
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HW_BREAKPOINT_LEN_2 = 2,
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HW_BREAKPOINT_LEN_4 = 4,
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HW_BREAKPOINT_LEN_8 = 8,
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};
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enum {
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HW_BREAKPOINT_R = 1,
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HW_BREAKPOINT_W = 2,
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HW_BREAKPOINT_X = 4,
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};
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static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
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{
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return bp->attr.bp_addr;
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}
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static inline int hw_breakpoint_type(struct perf_event *bp)
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{
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return bp->attr.bp_type;
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}
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static inline int hw_breakpoint_len(struct perf_event *bp)
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{
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return bp->attr.bp_len;
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}
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#ifdef CONFIG_HAVE_HW_BREAKPOINT
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extern struct perf_event *
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register_user_hw_breakpoint(unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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struct task_struct *tsk,
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bool active);
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/* FIXME: only change from the attr, and don't unregister */
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extern struct perf_event *
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modify_user_hw_breakpoint(struct perf_event *bp,
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unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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struct task_struct *tsk,
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bool active);
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/*
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* Kernel breakpoints are not associated with any particular thread.
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*/
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extern struct perf_event *
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register_wide_hw_breakpoint_cpu(unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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int cpu,
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bool active);
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extern struct perf_event **
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register_wide_hw_breakpoint(unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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bool active);
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extern int register_perf_hw_breakpoint(struct perf_event *bp);
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extern int __register_perf_hw_breakpoint(struct perf_event *bp);
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extern void unregister_hw_breakpoint(struct perf_event *bp);
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extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);
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extern int reserve_bp_slot(struct perf_event *bp);
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extern void release_bp_slot(struct perf_event *bp);
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extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
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static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
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{
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return &bp->hw.info;
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}
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#else /* !CONFIG_HAVE_HW_BREAKPOINT */
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static inline struct perf_event *
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register_user_hw_breakpoint(unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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struct task_struct *tsk,
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bool active) { return NULL; }
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static inline struct perf_event *
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modify_user_hw_breakpoint(struct perf_event *bp,
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unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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struct task_struct *tsk,
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bool active) { return NULL; }
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static inline struct perf_event *
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register_wide_hw_breakpoint_cpu(unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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int cpu,
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bool active) { return NULL; }
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static inline struct perf_event **
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register_wide_hw_breakpoint(unsigned long addr,
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int len,
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int type,
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perf_callback_t triggered,
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bool active) { return NULL; }
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static inline int
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register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
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static inline int
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__register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
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static inline void unregister_hw_breakpoint(struct perf_event *bp) { }
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static inline void
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unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { }
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static inline int
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reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; }
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static inline void release_bp_slot(struct perf_event *bp) { }
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static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { }
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static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
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{
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return NULL;
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}
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#endif /* CONFIG_HAVE_HW_BREAKPOINT */
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#endif /* _LINUX_HW_BREAKPOINT_H */
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