| /* 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 |
