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linux-next/arch/x86/include/asm/extable.h
Al Viro 45caf47007 x86: separate extable.h, switch sections.h to it
drivers/platform/x86/dell-smo8800.c is touched due to the following obscenity:
drivers/platform/x86/dell-smo8800.c ->
	linux/interrupt.h ->
		linux/hardirq.h ->
			asm/hardirq.h ->
				linux/irq.h ->
					asm/hw_irq.h ->
						asm/sections.h ->
							asm/uaccess.h
is the only chain of includes pulling asm/uaccess.h there.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-09-27 21:15:23 -04:00

36 lines
1.2 KiB
C

#ifndef _ASM_X86_EXTABLE_H
#define _ASM_X86_EXTABLE_H
/*
* The exception table consists of triples of addresses relative to the
* exception table entry itself. The first address is of an instruction
* that is allowed to fault, the second is the target at which the program
* should continue. The third is a handler function to deal with the fault
* caused by the instruction in the first field.
*
* All the routines below use bits of fixup code that are out of line
* with the main instruction path. This means when everything is well,
* we don't even have to jump over them. Further, they do not intrude
* on our cache or tlb entries.
*/
struct exception_table_entry {
int insn, fixup, handler;
};
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)->handler = (b)->handler + (delta); \
(b)->handler = (tmp).handler - (delta); \
} while (0)
extern int fixup_exception(struct pt_regs *regs, int trapnr);
extern bool ex_has_fault_handler(unsigned long ip);
extern void early_fixup_exception(struct pt_regs *regs, int trapnr);
#endif