linux/arch/x86/kernel/step.c

// SPDX-License-Identifier: GPL-2.0
/*
 * x86 single-step support code, common to 32-bit and 64-bit.
 */
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <linux/mm.h>
#include <linux/ptrace.h>

#include <asm/desc.h>
#include <asm/debugreg.h>
#include <asm/mmu_context.h>

unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs)
{ … }

static int is_setting_trap_flag(struct task_struct *child, struct pt_regs *regs)
{ … }

/*
 * Enable single-stepping.  Return nonzero if user mode is not using TF itself.
 */
static int enable_single_step(struct task_struct *child)
{ … }

void set_task_blockstep(struct task_struct *task, bool on)
{ … }

/*
 * Enable single or block step.
 */
static void enable_step(struct task_struct *child, bool block)
{ … }

void user_enable_single_step(struct task_struct *child)
{ … }

void user_enable_block_step(struct task_struct *child)
{ … }

void user_disable_single_step(struct task_struct *child)
{ … }