--- /dev/null
+/*
+ * Tracing hooks
+ *
+ * This file defines hook entry points called by core code where
+ * user tracing/debugging support might need to do something.
+ * These entry points are called tracehook_*. Each hook declared below
+ * has a detailed comment giving the context (locking et al) from
+ * which it is called, and the meaning of its return value (if any).
+ *
+ * We also declare here tracehook_* functions providing access to low-level
+ * interrogation and control of threads. These functions must be called
+ * on either the current thread or on a quiescent thread. We say a
+ * thread is "quiescent" if it is in TASK_STOPPED or TASK_TRACED state,
+ * we are guaranteed it will not be woken up and return to user mode, and
+ * we have called wait_task_inactive on it.
+ */
+
+#ifndef _LINUX_TRACEHOOK_H
+#define _LINUX_TRACEHOOK_H 1
+
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+struct linux_binprm;
+struct pt_regs;
+
+
+/*
+ * The machine-specific asm/tracehook.h file is responsible for declaring
+ * the following entry points. These can be called only on a quiescent thread,
+ * or the current thread when it is about to return to user mode.
+ *
+ * Single-step control. When enabled, the next instruction or syscall exit
+ * produces a SIGTRAP. Enabling or disabling redundantly is harmless.
+ *
+ * void tracehook_enable_single_step(struct task_struct *tsk);
+ * void tracehook_disable_single_step(struct task_struct *tsk);
+ * int tracehook_single_step_enabled(struct task_struct *tsk);
+ *
+ * If those calls are defined, #define ARCH_HAS_SINGLE_STEP to nonzero.
+ * Do not #define it if these calls are never available in this kernel config.
+ * If defined, the value of ARCH_HAS_SINGLE_STEP can be constant or variable.
+ * It should evaluate to nonzero if the hardware is able to support
+ * tracehook_enable_single_step. If it's a variable expression, it
+ * should be one that can be evaluated in modules, i.e. uses exported symbols.
+ *
+ * Block-step control (trap on control transfer), when available.
+ * tracehook_disable_block_step will be called after tracehook_enable_single_step.
+ * When enabled, the next jump, or other control transfer or syscall exit,
+ * produces a SIGTRAP. Enabling or disabling redundantly is harmless.
+ *
+ * void tracehook_enable_block_step(struct task_struct *tsk);
+ * void tracehook_disable_block_step(struct task_struct *tsk);
+ * int tracehook_block_step_enabled(struct task_struct *tsk);
+ *
+ * If those calls are defined, #define ARCH_HAS_BLOCK_STEP to nonzero.
+ * Do not #define it if these calls are never available in this kernel config.
+ * If defined, the value of ARCH_HAS_BLOCK_STEP can be constant or variable.
+ * It should evaluate to nonzero if the hardware is able to support
+ * tracehook_enable_block_step. If it's a variable expression, it
+ * should be one that can be evaluated in modules, i.e. uses exported symbols.
+ *
+ * Control system call tracing. When enabled a syscall entry or exit
+ * produces a call to tracehook_report_syscall, below.
+ *
+ * void tracehook_enable_syscall_trace(struct task_struct *tsk);
+ * void tracehook_disable_syscall_trace(struct task_struct *tsk);
+ *
+ * When stopped in tracehook_report_syscall for syscall entry,
+ * abort the syscall so no kernel function is called.
+ * If the register state was not otherwise updated before,
+ * this produces an -ENOSYS error return as for an invalid syscall number.
+ *
+ * void tracehook_abort_syscall(struct pt_regs *regs);
+ *
+ * Return the regset view (see below) that is native for the given process.
+ * For example, what it would access when it called ptrace.
+ * Throughout the life of the process, this only changes at exec.
+ *
+ * const struct utrace_regset_view *utrace_native_view(struct task_struct *);
+ *
+ ***/
+
+
+/*
+ * This data structure describes a machine resource we call a register set.
+ * This is part of the state of an individual thread, not necessarily
+ * actual CPU registers per se. A register set consists of a number of
+ * similar slots, given by ->n. Each slot is ->size bytes, and aligned to
+ * ->align bytes (which is at least ->size).
+ *
+ * As described above, these entry points can be called on the current
+ * thread or on a quiescent thread. The pos argument must be aligned
+ * according to ->align; the count argument must be a multiple of ->size.
+ * These functions are not responsible for checking for invalid arguments.
+ *
+ * When there is a natural value to use as an index, ->bias gives the
+ * difference between the natural index and the slot index for the
+ * register set. For example, x86 GDT segment descriptors form a regset;
+ * the segment selector produces a natural index, but only a subset of
+ * that index space is available as a regset (the TLS slots); subtracting
+ * ->bias from a segment selector index value computes the regset slot.
+ */
+struct utrace_regset {
+ unsigned int n; /* Number of slots (registers). */
+ unsigned int size; /* Size in bytes of a slot (register). */
+ unsigned int align; /* Required alignment, in bytes. */
+ unsigned int bias; /* Bias from natural indexing. */
+
+ /*
+ * Return -ENODEV if not available on the hardware found.
+ * Return 0 if no interesting state in this thread.
+ * Return >0 number of ->size units of interesting state.
+ * Any get call fetching state beyond that number will
+ * see the default initialization state for this data,
+ * so a caller that knows that the default state is need
+ * not copy it all out.
+ * This call is optional; the pointer is NULL if there
+ * so no inexpensive check to yield a value < .n.
+ */
+ int (*active)(struct task_struct *, const struct utrace_regset *);
+
+ /*
+ * Fetch and store register values. Return 0 on success; -EIO or
+ * -ENODEV are usual failure returns. The pos and count values are
+ * in bytes, but must be properly aligned. If kbuf is non-null,
+ * that buffer is used and ubuf is ignored. If kbuf is NULL, then
+ * ubuf gives a userland pointer to access directly, and an -EFAULT
+ * return value is possible.
+ */
+ int (*get)(struct task_struct *, const struct utrace_regset *,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf);
+ int (*set)(struct task_struct *, const struct utrace_regset *,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf);
+
+ /*
+ * This call is optional; usually the pointer is NULL.
+ * When provided, there is some user memory associated
+ * with this regset's hardware, such as memory backing
+ * cached register data on register window machines; the
+ * regset's data controls what user memory is used
+ * (e.g. via the stack pointer value).
+ *
+ * Write register data back to user memory. If the
+ * immediate flag is nonzero, it must be written to the
+ * user memory so uaccess/access_process_vm can see it
+ * when this call returns; if zero, then it must be
+ * written back by the time the task completes a context
+ * switch (as synchronized with wait_task_inactive).
+ * Return 0 on success or if there was nothing to do,
+ * -EFAULT for a memory problem (bad stack pointer or
+ * whatever), or -EIO for a hardware problem.
+ */
+ int (*writeback)(struct task_struct *, const struct utrace_regset *,
+ int immediate);
+};
+
+/*
+ * A regset view is a collection of regsets (struct utrace_regset, above).
+ * This describes all the state of a thread that can be seen from a given
+ * architecture/ABI environment. More than one view might refer to the
+ * same utrace_regset, or more than one regset might refer to the same
+ * machine-specific state in the thread. For example, a 32-bit thread's
+ * state could be examined from the 32-bit view or from the 64-bit view.
+ * Either method reaches the same thread register state, doing appropriate
+ * widening or truncation.
+ */
+struct utrace_regset_view {
+ const char *name; /* Identifier, e.g. ELF_PLATFORM string. */
+
+ const struct utrace_regset *regsets;
+ unsigned int n;
+
+ /*
+ * EM_* value for which this is the native view, if any.
+ */
+ u16 e_machine;
+};
+
+
+/*
+ * These two are helpers for writing regset get/set functions in arch code.
+ * Use one or more calls sequentially for each chunk of regset data stored
+ * contiguously in memory. Call with constants for start_pos and end_pos,
+ * giving the range of byte positions in the regset that data corresponds
+ * to; end_pos can be -1 if this chunk is at the end of the regset layout.
+ * Each call updates the arguments to point past its chunk.
+ */
+
+static inline int
+utrace_regset_copyout(unsigned int *pos, unsigned int *count,
+ void **kbuf, void __user **ubuf,
+ const void *data, int start_pos, int end_pos)
+{
+ if (*count == 0)
+ return 0;
+ BUG_ON(*pos < start_pos);
+ if (end_pos < 0 || *pos < end_pos) {
+ unsigned int copy = (end_pos < 0 ? *count
+ : min(*count, end_pos - *pos));
+ data += *pos - start_pos;
+ if (*kbuf) {
+ memcpy(*kbuf, data, copy);
+ *kbuf += copy;
+ }
+ else if (copy_to_user(*ubuf, data, copy))
+ return -EFAULT;
+ else
+ *ubuf += copy;
+ *pos += copy;
+ *count -= copy;
+ }
+ return 0;
+}
+
+static inline int
+utrace_regset_copyin(unsigned int *pos, unsigned int *count,
+ const void **kbuf, const void __user **ubuf,
+ void *data, int start_pos, int end_pos)
+{
+ if (*count == 0)
+ return 0;
+ BUG_ON(*pos < start_pos);
+ if (end_pos < 0 || *pos < end_pos) {
+ unsigned int copy = (end_pos < 0 ? *count
+ : min(*count, end_pos - *pos));
+ data += *pos - start_pos;
+ if (*kbuf) {
+ memcpy(data, *kbuf, copy);
+ *kbuf += copy;
+ }
+ else if (copy_from_user(data, *ubuf, copy))
+ return -EFAULT;
+ else
+ *ubuf += copy;
+ *pos += copy;
+ *count -= copy;
+ }
+ return 0;
+}
+
+/*
+ * These two parallel the two above, but for portions of a regset layout
+ * that always read as all-zero or for which writes are ignored.
+ */
+static inline int
+utrace_regset_copyout_zero(unsigned int *pos, unsigned int *count,
+ void **kbuf, void __user **ubuf,
+ int start_pos, int end_pos)
+{
+ if (*count == 0)
+ return 0;
+ BUG_ON(*pos < start_pos);
+ if (end_pos < 0 || *pos < end_pos) {
+ unsigned int copy = (end_pos < 0 ? *count
+ : min(*count, end_pos - *pos));
+ if (*kbuf) {
+ memset(*kbuf, 0, copy);
+ *kbuf += copy;
+ }
+ else if (clear_user(*ubuf, copy))
+ return -EFAULT;
+ else
+ *ubuf += copy;
+ *pos += copy;
+ *count -= copy;
+ }
+ return 0;
+}
+
+static inline int
+utrace_regset_copyin_ignore(unsigned int *pos, unsigned int *count,
+ const void **kbuf, const void __user **ubuf,
+ int start_pos, int end_pos)
+{
+ if (*count == 0)
+ return 0;
+ BUG_ON(*pos < start_pos);
+ if (end_pos < 0 || *pos < end_pos) {
+ unsigned int copy = (end_pos < 0 ? *count
+ : min(*count, end_pos - *pos));
+ if (*kbuf)
+ *kbuf += copy;
+ else
+ *ubuf += copy;
+ *pos += copy;
+ *count -= copy;
+ }
+ return 0;
+}
+
+/**/
+
+
+/***
+ ***
+ *** Following are entry points from core code, where the user debugging
+ *** support can affect the normal behavior. The locking situation is
+ *** described for each call.
+ ***
+ ***/
+
+#ifdef CONFIG_UTRACE
+#include <linux/utrace.h>
+#endif
+
+
+/*
+ * Called in copy_process when setting up the copied task_struct,
+ * with tasklist_lock held for writing.
+ */
+static inline void tracehook_init_task(struct task_struct *child)
+{
+#ifdef CONFIG_UTRACE
+ child->utrace_flags = 0;
+ child->utrace = NULL;
+#endif
+}
+
+/*
+ * Called from release_task, no locks held.
+ * After this, there should be no tracing entanglements.
+ */
+static inline void tracehook_release_task(struct task_struct *p)
+{
+#ifdef CONFIG_UTRACE
+ smp_mb();
+ if (p->utrace != NULL)
+ utrace_release_task(p);
+#endif
+}
+
+/*
+ * Return nonzero to trigger a BUG_ON crash in release_task.
+ * This should verify that there is no tracing-related state
+ * still affecting the task_struct about to be released.
+ * Called with tasklist_lock held for writing.
+ */
+static inline int tracehook_check_released(struct task_struct *p)
+{
+#ifdef CONFIG_UTRACE
+ return unlikely(p->utrace != NULL);
+#endif
+ return 0;
+}
+
+/*
+ * do_notify_parent_cldstop calls this when it's about to generate a SIGCHLD
+ * for a job control stop. Return nonzero to prevent that signal generation.
+ * Called with tasklist_lock held for reading, sometimes with irqs disabled.
+ */
+static inline int tracehook_notify_cldstop(struct task_struct *tsk,
+ const siginfo_t *info)
+{
+#ifdef CONFIG_UTRACE
+ if (tsk->utrace_flags & UTRACE_ACTION_NOREAP)
+ return 1;
+#endif
+ return 0;
+}
+
+/*
+ * exit_notify calls this with tasklist_lock held for writing.
+ * Return nonzero to prevent any normal SIGCHLD generation for this
+ * thread's death (i.e. when it is not ignored and its thread group is
+ * empty). This call must set *noreap to 0, or to 1 to force this thread
+ * to become a zombie when it would normally reap itself.
+ * The *death_cookie is passed to tracehook_report_death (below).
+ */
+static inline int tracehook_notify_death(struct task_struct *tsk,
+ int *noreap, void **death_cookie)
+{
+ *death_cookie = NULL;
+#ifdef CONFIG_UTRACE
+ *death_cookie = tsk->utrace;
+ if (tsk->utrace_flags & UTRACE_ACTION_NOREAP) {
+ *noreap = 1;
+ return 1;
+ }
+#endif
+ *noreap = 0;
+ return 0;
+}
+
+/*
+ * Return zero iff tracing doesn't care to examine this fatal signal,
+ * so it can short-circuit normal delivery directly to a group exit.
+ * Called with tsk->sighand->siglock held.
+ */
+static inline int tracehook_consider_fatal_signal(struct task_struct *tsk,
+ int sig)
+{
+#ifdef CONFIG_UTRACE
+ return (tsk->utrace_flags & (UTRACE_EVENT(SIGNAL_TERM)
+ | UTRACE_EVENT(SIGNAL_CORE)));
+#endif
+ return 0;
+}
+
+/*
+ * Return zero iff tracing doesn't care to examine this ignored signal,
+ * so it can short-circuit normal delivery and never even get queued.
+ * Either the handler is SIG_DFL and sig's default is ignore, or it's SIG_IGN.
+ * Called with tsk->sighand->siglock held.
+ */
+static inline int tracehook_consider_ignored_signal(struct task_struct *tsk,
+ int sig, void *handler)
+{
+#ifdef CONFIG_UTRACE
+ return (tsk->utrace_flags & UTRACE_EVENT(SIGNAL_IGN));
+#endif
+ return 0;
+}
+
+
+/*
+ * Called with the siglock held when computing tsk's signal_pending flag.
+ * Return nonzero to force the signal_pending flag on, so that
+ * tracehook_induce_signal will be called before the next return to user mode.
+ */
+static inline int tracehook_induce_sigpending(struct task_struct *tsk)
+{
+#ifdef CONFIG_UTRACE
+ return unlikely(tsk->utrace_flags & UTRACE_ACTION_QUIESCE);
+#endif
+ return 0;
+}
+
+/*
+ * Called with the siglock held before dequeuing pending signals.
+ * Return zero to check for a real pending signal normally.
+ * Return -1 after releasing the siglock to repeat the check.
+ * Return a signal number to induce an artifical signal delivery,
+ * setting *info and *return_ka to specify its details and behavior.
+ */
+static inline int tracehook_get_signal(struct task_struct *tsk,
+ struct pt_regs *regs,
+ siginfo_t *info,
+ struct k_sigaction *return_ka)
+{
+#ifdef CONFIG_UTRACE
+ if (unlikely(tsk->utrace_flags))
+ return utrace_get_signal(tsk, regs, info, return_ka);
+#endif
+ return 0;
+}
+
+/*
+ * Called with no locks held when about to stop for job control;
+ * we are already in TASK_STOPPED state, about to call schedule.
+ * Return zero if the normal SIGCHLD should be generated, which
+ * will happen if last_one is true meaning this is the last thread
+ * in the thread group to stop.
+ */
+static inline int tracehook_finish_stop(int last_one)
+{
+#ifdef CONFIG_UTRACE
+ if (current->utrace_flags & UTRACE_EVENT(JCTL))
+ return utrace_report_jctl(CLD_STOPPED);
+#endif
+
+ return 0;
+}
+
+/*
+ * Called with tasklist_lock held for reading, for an event notification stop.
+ * We are already in TASK_TRACED. Return zero to go back to running,
+ * or nonzero to actually stop until resumed.
+ */
+static inline int tracehook_stop_now(void)
+{
+ return 0;
+}
+
+
+/*
+ * Return nonzero if the child's parent (current) should be prevented
+ * from seeing its child in TASK_STOPPED state when it waits with WSTOPPED.
+ * Called with tasklist_lock held for reading.
+ */
+static inline int tracehook_inhibit_wait_stopped(struct task_struct *child)
+{
+#ifdef CONFIG_UTRACE
+ return (child->utrace_flags & UTRACE_ACTION_NOREAP);
+#endif
+ return 0;
+}
+
+/*
+ * Return nonzero if the child's parent (current) should be prevented
+ * from seeing its child in TASK_ZOMBIE state when it waits with WEXITED.
+ * Called with tasklist_lock held for reading.
+ */
+static inline int tracehook_inhibit_wait_zombie(struct task_struct *child)
+{
+#ifdef CONFIG_UTRACE
+ return (child->utrace_flags & UTRACE_ACTION_NOREAP);
+#endif
+ return 0;
+}
+
+/*
+ * Return nonzero if the child's parent (current) should be prevented
+ * from seeing its child resuming after job stop when it waits with WCONTINUED.
+ * Called with tasklist_lock held for reading.
+ */
+static inline int tracehook_inhibit_wait_continued(struct task_struct *child)
+{
+#ifdef CONFIG_UTRACE
+ return (child->utrace_flags & UTRACE_ACTION_NOREAP);
+#endif
+ return 0;
+}
+
+
+/*
+ * Return LSM_UNSAFE_* bits applied to an exec because of tracing.
+ * Called with task_lock(tsk) held.
+ */
+static inline int tracehook_unsafe_exec(struct task_struct *tsk)
+{
+#ifdef CONFIG_UTRACE
+ if (tsk->utrace_flags)
+ return utrace_unsafe_exec(tsk);
+#endif
+ return 0;
+}
+
+/*
+ * Return the task_struct for the task using ptrace on this one, or NULL.
+ * Must be called with rcu_read_lock held to keep the returned struct alive.
+ *
+ * At exec time, this may be called with task_lock(p) still held from when
+ * tracehook_unsafe_exec was just called.
+ *
+ * The value is also used to display after "TracerPid:" in /proc/PID/status,
+ * where it is called with only rcu_read_lock held.
+ */
+static inline struct task_struct *tracehook_tracer_task(struct task_struct *p)
+{
+#ifdef CONFIG_UTRACE
+ if (p->utrace_flags)
+ return utrace_tracer_task(p);
+#endif
+ return NULL;
+}
+
+/*
+ * Return nonzero if the current task should be allowed to use
+ * access_process_vm on the given task.
+ */
+static inline int tracehook_allow_access_process_vm(struct task_struct *tsk)
+{
+ if (tsk == current)
+ return 1;
+#ifdef CONFIG_UTRACE
+ if (tsk->utrace_flags)
+ return utrace_allow_access_process_vm(tsk);
+#endif
+ return 0;
+}
+
+
+/***
+ ***
+ *** Following decelarations are hook stubs where core code reports
+ *** events. These are called without locks, from the thread having the
+ *** event. In all tracehook_report_* calls, no locks are held and the thread
+ *** is in a state close to returning to user mode with little baggage to
+ *** unwind, except as noted below for tracehook_report_clone. It is generally
+ *** OK to block in these places if you want the user thread to be suspended.
+ ***
+ ***/
+
+/*
+ * Thread has just become a zombie (exit_state==TASK_ZOMBIE) or is about to
+ * self-reap (exit_state==EXIT_DEAD). If normal reaping is not inhibited,
+ * tsk->exit_state might be changing in parallel. The death_cookie was
+ * passed back by tracehook_notify_death (above).
+ */
+static inline void tracehook_report_death(struct task_struct *tsk,
+ int exit_state, void *death_cookie)
+{
+#ifdef CONFIG_UTRACE
+ smp_mb();
+ if (tsk->utrace_flags & (UTRACE_EVENT(DEATH) | UTRACE_ACTION_QUIESCE))
+ utrace_report_death(tsk, death_cookie);
+#endif
+}
+
+/*
+ * exec completed, we are shortly going to return to user mode.
+ * The freshly initialized register state can be seen and changed here.
+ */
+static inline void tracehook_report_exec(struct linux_binprm *bprm,
+ struct pt_regs *regs)
+{
+#ifdef CONFIG_UTRACE
+ if (current->utrace_flags & UTRACE_EVENT(EXEC))
+ utrace_report_exec(bprm, regs);
+#endif
+}
+
+/*
+ * Called from do_exit, we are about to exit. The code returned to the
+ * parent for wait can be changed here.
+ */
+static inline void tracehook_report_exit(long *exit_code)
+{
+#ifdef CONFIG_UTRACE
+ if (current->utrace_flags & UTRACE_EVENT(EXIT))
+ utrace_report_exit(exit_code);
+#endif
+}
+
+/*
+ * Called after a child is set up, but before it has been started or
+ * been given its CLONE_STOPPED initial stop. (See also tracehook_init_task.)
+ * This is not a good place to block, because the child has not started yet.
+ * Suspend the child here if desired, and block in clone_complete (below).
+ * This must prevent the child from self-reaping if clone_complete uses
+ * the task_struct pointer; otherwise it might have died and been released
+ * by the time tracehook_report_clone_complete is called.
+ */
+static inline void tracehook_report_clone(unsigned long clone_flags,
+ struct task_struct *child)
+{
+#ifdef CONFIG_UTRACE
+ if (current->utrace_flags & UTRACE_EVENT(CLONE))
+ utrace_report_clone(clone_flags, child);
+#endif
+}
+
+/*
+ * Called after the child has started running, shortly after
+ * tracehook_report_clone. This is just before the clone/fork syscall
+ * returns, or blocks for vfork child completion if (clone_flags &
+ * CLONE_VFORK). The child pointer may be invalid if a self-reaping
+ * child died and tracehook_report_clone took no action to prevent it
+ * from self-reaping.
+ */
+static inline void tracehook_report_clone_complete(unsigned long clone_flags,
+ pid_t pid,
+ struct task_struct *child)
+{
+#ifdef CONFIG_UTRACE
+ if (current->utrace_flags & UTRACE_ACTION_QUIESCE)
+ utrace_quiescent(current);
+#endif
+}
+
+/*
+ * Called after a CLONE_VFORK parent has waited for the child to complete.
+ * The clone/vfork system call will return immediately after this.
+ * The child pointer may be invalid if a self-reaping child died and
+ * tracehook_report_clone took no action to prevent it from self-reaping.
+ */
+static inline void tracehook_report_vfork_done(struct task_struct *child,
+ pid_t child_pid)
+{
+#ifdef CONFIG_UTRACE
+ if (current->utrace_flags & UTRACE_EVENT(VFORK_DONE))
+ utrace_report_vfork_done(child_pid);
+#endif
+}
+
+/*
+ * Called for system call entry or exit.
+ */
+static inline void tracehook_report_syscall(struct pt_regs *regs, int is_exit)
+{
+#ifdef CONFIG_UTRACE
+ if (current->utrace_flags & (is_exit ? UTRACE_EVENT(SYSCALL_EXIT)
+ : UTRACE_EVENT(SYSCALL_ENTRY)))
+ utrace_report_syscall(regs, is_exit);
+#endif
+}
+
+/*
+ * Called after system call exit if single/block-stepped into the syscall.
+ */
+static inline void tracehook_report_syscall_step(struct pt_regs *regs)
+{
+}
+
+/*
+ * Called when a signal handler has been set up.
+ * Register and stack state reflects the user handler about to run.
+ * Signal mask changes have already been made.
+ */
+static inline void tracehook_report_handle_signal(int sig,
+ const struct k_sigaction *ka,
+ const sigset_t *oldset,
+ struct pt_regs *regs)
+{
+#ifdef CONFIG_UTRACE
+ struct task_struct *tsk = current;
+ if ((tsk->utrace_flags & UTRACE_EVENT_SIGNAL_ALL)
+ && (tsk->utrace_flags & (UTRACE_ACTION_SINGLESTEP
+ | UTRACE_ACTION_BLOCKSTEP)))
+ utrace_signal_handler_singlestep(tsk, regs);
+#endif
+}
+
+
+#endif /* <linux/tracehook.h> */
git://git.onelab.eu / linux-2.6.git / blobdiff