include/linux/ptdump.h

File Facts

System

Linux kernel

Corpus path

include/linux/ptdump.h

Extension

.h

Size

1382 bytes

Lines

41

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/mm_types.h

Detected Declarations

• struct ptdump_range
• struct ptdump_state
• function debug_checkwx

Annotated Snippet

struct ptdump_range {
	unsigned long start;
	unsigned long end;
};

struct ptdump_state {
	void (*note_page_pte)(struct ptdump_state *st, unsigned long addr, pte_t pte);
	void (*note_page_pmd)(struct ptdump_state *st, unsigned long addr, pmd_t pmd);
	void (*note_page_pud)(struct ptdump_state *st, unsigned long addr, pud_t pud);
	void (*note_page_p4d)(struct ptdump_state *st, unsigned long addr, p4d_t p4d);
	void (*note_page_pgd)(struct ptdump_state *st, unsigned long addr, pgd_t pgd);
	void (*note_page_flush)(struct ptdump_state *st);
	void (*effective_prot_pte)(struct ptdump_state *st, pte_t pte);
	void (*effective_prot_pmd)(struct ptdump_state *st, pmd_t pmd);
	void (*effective_prot_pud)(struct ptdump_state *st, pud_t pud);
	void (*effective_prot_p4d)(struct ptdump_state *st, p4d_t p4d);
	void (*effective_prot_pgd)(struct ptdump_state *st, pgd_t pgd);
	const struct ptdump_range *range;
};

bool ptdump_walk_pgd_level_core(struct seq_file *m,
				struct mm_struct *mm, pgd_t *pgd,
				bool checkwx, bool dmesg);
void ptdump_walk_pgd(struct ptdump_state *st, struct mm_struct *mm, pgd_t *pgd);
bool ptdump_check_wx(void);

static inline void debug_checkwx(void)
{
	if (IS_ENABLED(CONFIG_DEBUG_WX))
		ptdump_check_wx();
}

#endif /* _LINUX_PTDUMP_H */

Annotation

• Immediate include surface: `linux/mm_types.h`.
• Detected declarations: `struct ptdump_range`, `struct ptdump_state`, `function debug_checkwx`.
• Atlas domain: Core OS / Core Kernel Interface.
• 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.