--- /dev/null
+#ifndef _LWK_PTRACE_H
+#define _LWK_PTRACE_H
+/* ptrace.h */
+/* structs and defines to help the user use the ptrace system call. */
+
+/* has the defines to get at the registers. */
+
+#define PTRACE_TRACEME 0
+#define PTRACE_PEEKTEXT 1
+#define PTRACE_PEEKDATA 2
+#define PTRACE_PEEKUSR 3
+#define PTRACE_POKETEXT 4
+#define PTRACE_POKEDATA 5
+#define PTRACE_POKEUSR 6
+#define PTRACE_CONT 7
+#define PTRACE_KILL 8
+#define PTRACE_SINGLESTEP 9
+
+#define PTRACE_ATTACH 0x10
+#define PTRACE_DETACH 0x11
+
+#define PTRACE_SYSCALL 24
+
+/* 0x4200-0x4300 are reserved for architecture-independent additions. */
+#define PTRACE_SETOPTIONS 0x4200
+#define PTRACE_GETEVENTMSG 0x4201
+#define PTRACE_GETSIGINFO 0x4202
+#define PTRACE_SETSIGINFO 0x4203
+
+/* options set using PTRACE_SETOPTIONS */
+#define PTRACE_O_TRACESYSGOOD 0x00000001
+#define PTRACE_O_TRACEFORK 0x00000002
+#define PTRACE_O_TRACEVFORK 0x00000004
+#define PTRACE_O_TRACECLONE 0x00000008
+#define PTRACE_O_TRACEEXEC 0x00000010
+#define PTRACE_O_TRACEVFORKDONE 0x00000020
+#define PTRACE_O_TRACEEXIT 0x00000040
+
+#define PTRACE_O_MASK 0x0000007f
+
+/* Wait extended result codes for the above trace options. */
+#define PTRACE_EVENT_FORK 1
+#define PTRACE_EVENT_VFORK 2
+#define PTRACE_EVENT_CLONE 3
+#define PTRACE_EVENT_EXEC 4
+#define PTRACE_EVENT_VFORK_DONE 5
+#define PTRACE_EVENT_EXIT 6
+
+#include <arch/ptrace.h>
+
+#ifdef __KERNEL__
+/*
+ * Ptrace flags
+ */
+
+#define PT_PTRACED 0x00000001
+#define PT_DTRACE 0x00000002 /* delayed trace (used on m68k, i386) */
+#define PT_TRACESYSGOOD 0x00000004
+#define PT_PTRACE_CAP 0x00000008 /* ptracer can follow suid-exec */
+#define PT_TRACE_FORK 0x00000010
+#define PT_TRACE_VFORK 0x00000020
+#define PT_TRACE_CLONE 0x00000040
+#define PT_TRACE_EXEC 0x00000080
+#define PT_TRACE_VFORK_DONE 0x00000100
+#define PT_TRACE_EXIT 0x00000200
+#define PT_ATTACHED 0x00000400 /* parent != real_parent */
+
+#define PT_TRACE_MASK 0x000003f4
+
+/* single stepping state bits (used on ARM and PA-RISC) */
+#define PT_SINGLESTEP_BIT 31
+#define PT_SINGLESTEP (1<<PT_SINGLESTEP_BIT)
+#define PT_BLOCKSTEP_BIT 30
+#define PT_BLOCKSTEP (1<<PT_BLOCKSTEP_BIT)
+
+#include <lwk/compiler.h> /* For unlikely. */
+#include <lwk/task.h>
+
+
+extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
+extern struct task_struct *ptrace_get_task(pid_t pid);
+extern int ptrace_traceme(void);
+extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
+extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
+extern int ptrace_attach(struct task_struct *tsk);
+extern int ptrace_detach(struct task_struct *, unsigned int);
+extern void __ptrace_detach(struct task_struct *, unsigned int);
+extern void ptrace_disable(struct task_struct *);
+extern int ptrace_check_attach(struct task_struct *task, int kill);
+extern int ptrace_request(struct task_struct *child, long request, long addr, long data);
+extern void ptrace_notify(int exit_code);
+extern void __ptrace_link(struct task_struct *child,
+ struct task_struct *new_parent);
+extern void __ptrace_unlink(struct task_struct *child);
+extern void ptrace_untrace(struct task_struct *child);
+extern int ptrace_may_attach(struct task_struct *task);
+
+static inline void ptrace_link(struct task_struct *child,
+ struct task_struct *new_parent)
+{
+ if (unlikely(child->ptrace))
+ __ptrace_link(child, new_parent);
+}
+static inline void ptrace_unlink(struct task_struct *child)
+{
+ if (unlikely(child->ptrace))
+ __ptrace_unlink(child);
+}
+
+
+#ifndef force_successful_syscall_return
+/*
+ * System call handlers that, upon successful completion, need to return a
+ * negative value should call force_successful_syscall_return() right before
+ * returning. On architectures where the syscall convention provides for a
+ * separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly
+ * others), this macro can be used to ensure that the error flag will not get
+ * set. On architectures which do not support a separate error flag, the macro
+ * is a no-op and the spurious error condition needs to be filtered out by some
+ * other means (e.g., in user-level, by passing an extra argument to the
+ * syscall handler, or something along those lines).
+ */
+#define force_successful_syscall_return() do { } while (0)
+#endif
+
+#endif
+
+#endif
