arch/arc/include/uapi/asm/signal.h

File Facts

System

Linux kernel

Corpus path

arch/arc/include/uapi/asm/signal.h

Extension

.h

Size

996 bytes

Lines

29

Domain

Architecture Layer

Bucket

arch/arc

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

• asm-generic/signal.h

Detected Declarations

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

Annotated Snippet

#ifndef _ASM_ARC_SIGNAL_H
#define _ASM_ARC_SIGNAL_H

/*
 * This is much needed for ARC sigreturn optimization.
 * This allows uClibc to piggback the addr of a sigreturn stub in sigaction,
 * which allows sigreturn based re-entry into kernel after handling signal.
 * W/o this kernel needs to "synthesize" the sigreturn trampoline on user
 * mode stack which in turn forces the following:
 * -TLB Flush (after making the stack page executable)
 * -Cache line Flush (to make I/D Cache lines coherent)
 */
#define SA_RESTORER	0x04000000

#include <asm-generic/signal.h>

#endif /* _ASM_ARC_SIGNAL_H */

Annotation

• Immediate include surface: `asm-generic/signal.h`.
• Atlas domain: Architecture Layer / arch/arc.
• 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.