include/linux/tracehook.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
5  * Copyright (C) 2008-2009 Red Hat, Inc.  All rights reserved.
31  * Some tracehook_*() inlines take arguments that the current tracing
38  * can change so there is no make-work burden on the core code.  The
51 #include <linux/blk-cgroup.h>
60 	int ptrace = current->ptrace;  in ptrace_report_syscall()
65 	current->ptrace_message = message;  in ptrace_report_syscall()
71 	 * stopping signal is not SIGTRAP.  -brl  in ptrace_report_syscall()
73 	if (current->exit_code) {  in ptrace_report_syscall()
74 		send_sig(current->exit_code, current, 1);  in ptrace_report_syscall()
75 		current->exit_code = 0;  in ptrace_report_syscall()
78 	current->ptrace_message = 0;  in ptrace_report_syscall()
79 	return fatal_signal_pending(current);  in ptrace_report_syscall()
83  * tracehook_report_syscall_entry - task is about to attempt a system call
84  * @regs:		user register state of current task
87  * when the current task has just entered the kernel for a system call.
94  * made.  If @task ever returns to user mode after this, its register state
97  * can work (see asm-generic/syscall.h).
99  * Called without locks, just after entering kernel mode.
108  * tracehook_report_syscall_exit - task has just finished a system call
109  * @regs:		user register state of current task
110  * @step:		nonzero if simulating single-step or block-step
113  * current task has just finished an attempted system call.  Full
133  * tracehook_signal_handler - signal handler setup is complete
134  * @stepping:		nonzero if debugger single-step or block-step in use
140  * Called without locks, shortly before returning to user mode
150  * set_notify_resume - cause tracehook_notify_resume() to be called
154  * before returning to user mode.  If it's already running in user mode,
167  * tracehook_notify_resume - report when about to return to user mode
168  * @regs:		user-mode registers of @current task
171  * about to return to user mode, and the user state in @regs can be
175  * user mode.
183 	 * This barrier pairs with task_work_add()->set_notify_resume() after  in tracehook_notify_resume()
184 	 * hlist_add_head(task->task_works);  in tracehook_notify_resume()
187 	if (unlikely(current->task_works))  in tracehook_notify_resume()
191 	if (unlikely(current->cached_requested_key)) {  in tracehook_notify_resume()
192 		key_put(current->cached_requested_key);  in tracehook_notify_resume()
193 		current->cached_requested_key = NULL;  in tracehook_notify_resume()