Viewing file:  extable.h (1.1 KB) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_EXTABLE_H
#define __ASM_EXTABLE_H
/*
* The exception table consists of pairs of relative offsets: the first
* is the relative offset to an instruction that is allowed to fault,
* and the second is the relative offset at which the program should
* continue. No registers are modified, so it is entirely up to the
* continuation code to figure out what to do.
*
* 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;
};
#define ARCH_HAS_RELATIVE_EXTABLE
#ifdef CONFIG_BPF_JIT
int arm64_bpf_fixup_exception(const struct exception_table_entry *ex,
struct pt_regs *regs);
#else /* !CONFIG_BPF_JIT */
static inline
int arm64_bpf_fixup_exception(const struct exception_table_entry *ex,
struct pt_regs *regs)
{
return 0;
}
#endif /* !CONFIG_BPF_JIT */
extern int fixup_exception(struct pt_regs *regs);
#endif
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