arch/x86/um/fault.c

Source file repositories/reference/linux-study-clean/arch/x86/um/fault.c

File Facts

System
Linux kernel
Corpus path
arch/x86/um/fault.c
Extension
.c
Size
677 bytes
Lines
30
Domain
Architecture Layer
Bucket
arch/x86
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

#include <arch.h>
#include <sysdep/ptrace.h>

/* These two are from asm-um/uaccess.h and linux/module.h, check them. */
struct exception_table_entry
{
	unsigned long insn;
	unsigned long fixup;
};

const struct exception_table_entry *search_exception_tables(unsigned long add);

/* Compare this to arch/i386/mm/extable.c:fixup_exception() */
int arch_fixup(unsigned long address, struct uml_pt_regs *regs)
{
	const struct exception_table_entry *fixup;

	fixup = search_exception_tables(address);
	if (fixup) {
		UPT_IP(regs) = fixup->fixup;
		return 1;
	}
	return 0;
}

Annotation

Implementation Notes