Cregit: Linux 5.9: extable.c

Contributors: 5
Author	Tokens	Token Proportion	Commits	Commit Proportion
Catalin Marinas	46	51.69%	1	20.00%
Jean-Philippe Brucker	32	35.96%	1	20.00%
Ard Biesheuvel	9	10.11%	1	20.00%
Paul Gortmaker	1	1.12%	1	20.00%
Greg Kroah-Hartman	1	1.12%	1	20.00%
Total	89		5

// SPDX-License-Identifier: GPL-2.0
/*
 * Based on arch/arm/mm/extable.c
 */

#include <linux/extable.h>
#include <linux/uaccess.h>

int fixup_exception(struct pt_regs *regs)
{
	const struct exception_table_entry *fixup;

	fixup = search_exception_tables(instruction_pointer(regs));
	if (!fixup)
		return 0;

	if (IS_ENABLED(CONFIG_BPF_JIT) &&
	    regs->pc >= BPF_JIT_REGION_START &&
	    regs->pc < BPF_JIT_REGION_END)
		return arm64_bpf_fixup_exception(fixup, regs);

	regs->pc = (unsigned long)&fixup->fixup + fixup->fixup;
	return 1;
}