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47 lines
1.3 KiB
47 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_EXTABLE_H |
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#define __ASM_EXTABLE_H |
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/* |
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* The exception table consists of pairs of relative offsets: the first |
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* is the relative offset to an instruction that is allowed to fault, |
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* and the second is the relative offset at which the program should |
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* continue. No registers are modified, so it is entirely up to the |
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* continuation code to figure out what to do. |
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* |
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* All the routines below use bits of fixup code that are out of line |
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* with the main instruction path. This means when everything is well, |
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* we don't even have to jump over them. Further, they do not intrude |
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* on our cache or tlb entries. |
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*/ |
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struct exception_table_entry |
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{ |
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int insn, fixup; |
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}; |
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#define ARCH_HAS_RELATIVE_EXTABLE |
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static inline bool in_bpf_jit(struct pt_regs *regs) |
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{ |
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if (!IS_ENABLED(CONFIG_BPF_JIT)) |
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return false; |
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return regs->pc >= BPF_JIT_REGION_START && |
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regs->pc < BPF_JIT_REGION_END; |
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} |
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#ifdef CONFIG_BPF_JIT |
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int arm64_bpf_fixup_exception(const struct exception_table_entry *ex, |
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struct pt_regs *regs); |
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#else /* !CONFIG_BPF_JIT */ |
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static inline |
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int arm64_bpf_fixup_exception(const struct exception_table_entry *ex, |
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struct pt_regs *regs) |
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{ |
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return 0; |
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} |
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#endif /* !CONFIG_BPF_JIT */ |
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extern int fixup_exception(struct pt_regs *regs); |
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#endif
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