arch/xtensa/include/asm/hw_breakpoint.h

File Facts

System

Linux kernel

Corpus path

arch/xtensa/include/asm/hw_breakpoint.h

Extension

.h

Size

1624 bytes

Lines

63

Domain

Architecture Layer

Bucket

arch/xtensa

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kdebug.h
• linux/types.h
• uapi/linux/hw_breakpoint.h

Detected Declarations

• struct arch_hw_breakpoint
• struct perf_event_attr
• struct perf_event
• struct pt_regs
• struct task_struct
• struct task_struct
• function clear_ptrace_hw_breakpoint

Annotated Snippet

struct arch_hw_breakpoint {
	unsigned long address;
	u16 len;
	u16 type;
};

struct perf_event_attr;
struct perf_event;
struct pt_regs;
struct task_struct;

int hw_breakpoint_slots(int type);
int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
int hw_breakpoint_arch_parse(struct perf_event *bp,
			     const struct perf_event_attr *attr,
			     struct arch_hw_breakpoint *hw);
int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
				    unsigned long val, void *data);

int arch_install_hw_breakpoint(struct perf_event *bp);
void arch_uninstall_hw_breakpoint(struct perf_event *bp);
void hw_breakpoint_pmu_read(struct perf_event *bp);
int check_hw_breakpoint(struct pt_regs *regs);
void clear_ptrace_hw_breakpoint(struct task_struct *tsk);
void restore_dbreak(void);

#else

struct task_struct;

static inline void clear_ptrace_hw_breakpoint(struct task_struct *tsk)
{
}

#endif /* CONFIG_HAVE_HW_BREAKPOINT */
#endif /* __ASM_XTENSA_HW_BREAKPOINT_H */

Annotation

• Immediate include surface: `linux/kdebug.h`, `linux/types.h`, `uapi/linux/hw_breakpoint.h`.
• Detected declarations: `struct arch_hw_breakpoint`, `struct perf_event_attr`, `struct perf_event`, `struct pt_regs`, `struct task_struct`, `struct task_struct`, `function clear_ptrace_hw_breakpoint`.
• Atlas domain: Architecture Layer / arch/xtensa.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.