linux/arch/x86/kernel/cet.c

// SPDX-License-Identifier: GPL-2.0

#include <linux/ptrace.h>
#include <asm/bugs.h>
#include <asm/traps.h>

enum cp_error_code { … };

static const char cp_err[][10] = …;

static const char *cp_err_string(unsigned long error_code)
{ … }

static void do_unexpected_cp(struct pt_regs *regs, unsigned long error_code)
{ … }

static DEFINE_RATELIMIT_STATE(cpf_rate, DEFAULT_RATELIMIT_INTERVAL,
			      DEFAULT_RATELIMIT_BURST);

static void do_user_cp_fault(struct pt_regs *regs, unsigned long error_code)
{ … }

static __ro_after_init bool ibt_fatal = …;

static void do_kernel_cp_fault(struct pt_regs *regs, unsigned long error_code)
{ … }

static int __init ibt_setup(char *str)
{ … }

__setup(…);

DEFINE_IDTENTRY_ERRORCODE(exc_control_protection)
{ … }