arch/x86/include/asm/extable.h

Source file repositories/reference/linux-study-clean/arch/x86/include/asm/extable.h

File Facts

System
Linux kernel
Corpus path
arch/x86/include/asm/extable.h
Extension
.h
Size
1862 bytes
Lines
61
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

struct exception_table_entry {
	int insn, fixup, data;
};
struct pt_regs;

#define ARCH_HAS_RELATIVE_EXTABLE

#define swap_ex_entry_fixup(a, b, tmp, delta)			\
	do {							\
		(a)->fixup = (b)->fixup + (delta);		\
		(b)->fixup = (tmp).fixup - (delta);		\
		(a)->data = (b)->data;				\
		(b)->data = (tmp).data;				\
	} while (0)

extern int fixup_exception(struct pt_regs *regs, int trapnr,
			   unsigned long error_code, unsigned long fault_addr);
extern int ex_get_fixup_type(unsigned long ip);
extern void early_fixup_exception(struct pt_regs *regs, int trapnr);

#ifdef CONFIG_X86_MCE
extern void __noreturn ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr);
#else
static inline void __noreturn ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr)
{
	for (;;)
		cpu_relax();
}
#endif

#if defined(CONFIG_BPF_JIT) && defined(CONFIG_X86_64)
bool ex_handler_bpf(const struct exception_table_entry *x, struct pt_regs *regs);
#else
static inline bool ex_handler_bpf(const struct exception_table_entry *x,
				  struct pt_regs *regs) { return false; }
#endif

#endif

Annotation

Implementation Notes