1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Based on arch/arm/mm/extable.c 4 */ 5 6 #include <linux/extable.h> 7 #include <linux/uaccess.h> 8 9 int fixup_exception(struct pt_regs *regs) 10 { 11 const struct exception_table_entry *fixup; 12 13 fixup = search_exception_tables(instruction_pointer(regs)); 14 if (!fixup) 15 return 0; 16 17 if (IS_ENABLED(CONFIG_BPF_JIT) && 18 regs->pc >= BPF_JIT_REGION_START && 19 regs->pc < BPF_JIT_REGION_END) 20 return arm64_bpf_fixup_exception(fixup, regs); 21 22 regs->pc = (unsigned long)&fixup->fixup + fixup->fixup; 23 return 1; 24 } 25