arch/um/include/shared/longjmp.h

File Facts

System

Linux kernel

Corpus path

arch/um/include/shared/longjmp.h

Extension

.h

Size

450 bytes

Lines

24

Domain

Architecture Layer

Bucket

arch/um

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.

Dependency Surface

• sysdep/archsetjmp.h
• os.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef __UML_LONGJMP_H
#define __UML_LONGJMP_H

#include <sysdep/archsetjmp.h>
#include <os.h>

extern int setjmp(jmp_buf);
extern void longjmp(jmp_buf, int);

#define UML_LONGJMP(buf, val) do { \
	longjmp(*buf, val);	\
} while(0)

#define UML_SETJMP(buf) ({				\
	int n, enable;					\
	enable = um_get_signals();			\
	n = setjmp(*buf);				\
	if(n != 0)					\
		um_set_signals_trace(enable);		\
	n; })

#endif

Annotation

• Immediate include surface: `sysdep/archsetjmp.h`, `os.h`.
• Atlas domain: Architecture Layer / arch/um.
• 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.