| /* 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 | |
| static inline bool in_bpf_jit(struct pt_regs *regs) | |
| { | |
| if (!IS_ENABLED(CONFIG_BPF_JIT)) | |
| return false; | |
| return regs->pc >= BPF_JIT_REGION_START && | |
| regs->pc < BPF_JIT_REGION_END; | |
| } | |
| #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 |