arch/arm64/include/asm/signal.h

Source file repositories/reference/linux-study-clean/arch/arm64/include/asm/signal.h

File Facts

System
Linux kernel
Corpus path
arch/arm64/include/asm/signal.h
Extension
.h
Size
650 bytes
Lines
26
Domain
Architecture Layer
Bucket
arch/arm64
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __ARM64_ASM_SIGNAL_H
#define __ARM64_ASM_SIGNAL_H

#include <asm/memory.h>
#include <uapi/asm/signal.h>
#include <uapi/asm/siginfo.h>

static inline void __user *arch_untagged_si_addr(void __user *addr,
						 unsigned long sig,
						 unsigned long si_code)
{
	/*
	 * For historical reasons, all bits of the fault address are exposed as
	 * address bits for watchpoint exceptions. New architectures should
	 * handle the tag bits consistently.
	 */
	if (sig == SIGTRAP && si_code == TRAP_BRKPT)
		return addr;

	return untagged_addr(addr);
}
#define arch_untagged_si_addr arch_untagged_si_addr

#endif

Annotation

Implementation Notes