diff options
Diffstat (limited to 'include/linux/ptrace.h')
| -rw-r--r-- | include/linux/ptrace.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index c6f5f9dd0cee..fd31756e1a00 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -121,6 +121,74 @@ static inline void ptrace_unlink(struct task_struct *child) int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data); int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data); +/** + * task_ptrace - return %PT_* flags that apply to a task + * @task: pointer to &task_struct in question + * + * Returns the %PT_* flags that apply to @task. + */ +static inline int task_ptrace(struct task_struct *task) +{ + return task->ptrace; +} + +/** + * ptrace_event - possibly stop for a ptrace event notification + * @mask: %PT_* bit to check in @current->ptrace + * @event: %PTRACE_EVENT_* value to report if @mask is set + * @message: value for %PTRACE_GETEVENTMSG to return + * + * This checks the @mask bit to see if ptrace wants stops for this event. + * If so we stop, reporting @event and @message to the ptrace parent. + * + * Returns nonzero if we did a ptrace notification, zero if not. + * + * Called without locks. + */ +static inline int ptrace_event(int mask, int event, unsigned long message) +{ + if (mask && likely(!(current->ptrace & mask))) + return 0; + current->ptrace_message = message; + ptrace_notify((event << 8) | SIGTRAP); + return 1; +} + +/** + * ptrace_init_task - initialize ptrace state for a new child + * @child: new child task + * @ptrace: true if child should be ptrace'd by parent's tracer + * + * This is called immediately after adding @child to its parent's children + * list. @ptrace is false in the normal case, and true to ptrace @child. + * + * Called with current's siglock and write_lock_irq(&tasklist_lock) held. + */ +static inline void ptrace_init_task(struct task_struct *child, bool ptrace) +{ + INIT_LIST_HEAD(&child->ptrace_entry); + INIT_LIST_HEAD(&child->ptraced); + child->parent = child->real_parent; + child->ptrace = 0; + if (unlikely(ptrace)) { + child->ptrace = current->ptrace; + __ptrace_link(child, current->parent); + } +} + +/** + * ptrace_release_task - final ptrace-related cleanup of a zombie being reaped + * @task: task in %EXIT_DEAD state + * + * Called with write_lock(&tasklist_lock) held. + */ +static inline void ptrace_release_task(struct task_struct *task) +{ + BUG_ON(!list_empty(&task->ptraced)); + ptrace_unlink(task); + BUG_ON(!list_empty(&task->ptrace_entry)); +} + #ifndef force_successful_syscall_return /* * System call handlers that, upon successful completion, need to return a @@ -246,6 +314,10 @@ static inline void user_enable_block_step(struct task_struct *task) #define arch_ptrace_stop(code, info) do { } while (0) #endif +extern int task_current_syscall(struct task_struct *target, long *callno, + unsigned long args[6], unsigned int maxargs, + unsigned long *sp, unsigned long *pc); + #endif #endif |