1 #ifndef _LINUX_PTRACE_H
2 #define _LINUX_PTRACE_H
4 /* structs and defines to help the user use the ptrace system call. */
6 /* has the defines to get at the registers. */
8 #define PTRACE_TRACEME 0
9 #define PTRACE_PEEKTEXT 1
10 #define PTRACE_PEEKDATA 2
11 #define PTRACE_PEEKUSR 3
12 #define PTRACE_POKETEXT 4
13 #define PTRACE_POKEDATA 5
14 #define PTRACE_POKEUSR 6
17 #define PTRACE_SINGLESTEP 9
19 #define PTRACE_ATTACH 0x10
20 #define PTRACE_DETACH 0x11
22 #define PTRACE_SYSCALL 24
23 #define PTRACE_SYSEMU 31
24 #define PTRACE_SYSEMU_SINGLESTEP 32
26 /* 0x4200-0x4300 are reserved for architecture-independent additions. */
27 #define PTRACE_SETOPTIONS 0x4200
28 #define PTRACE_GETEVENTMSG 0x4201
29 #define PTRACE_GETSIGINFO 0x4202
30 #define PTRACE_SETSIGINFO 0x4203
32 /* options set using PTRACE_SETOPTIONS */
33 #define PTRACE_O_TRACESYSGOOD 0x00000001
34 #define PTRACE_O_TRACEFORK 0x00000002
35 #define PTRACE_O_TRACEVFORK 0x00000004
36 #define PTRACE_O_TRACECLONE 0x00000008
37 #define PTRACE_O_TRACEEXEC 0x00000010
38 #define PTRACE_O_TRACEVFORKDONE 0x00000020
39 #define PTRACE_O_TRACEEXIT 0x00000040
41 #define PTRACE_O_MASK 0x0000007f
43 /* Wait extended result codes for the above trace options. */
44 #define PTRACE_EVENT_FORK 1
45 #define PTRACE_EVENT_VFORK 2
46 #define PTRACE_EVENT_CLONE 3
47 #define PTRACE_EVENT_EXEC 4
48 #define PTRACE_EVENT_VFORK_DONE 5
49 #define PTRACE_EVENT_EXIT 6
51 #include <asm/ptrace.h>
58 #define PT_PTRACED 0x00000001
59 #define PT_DTRACE 0x00000002 /* delayed trace (used on m68k, i386) */
60 #define PT_TRACESYSGOOD 0x00000004
61 #define PT_PTRACE_CAP 0x00000008 /* ptracer can follow suid-exec */
62 #define PT_TRACE_FORK 0x00000010
63 #define PT_TRACE_VFORK 0x00000020
64 #define PT_TRACE_CLONE 0x00000040
65 #define PT_TRACE_EXEC 0x00000080
66 #define PT_TRACE_VFORK_DONE 0x00000100
67 #define PT_TRACE_EXIT 0x00000200
68 #define PT_ATTACHED 0x00000400 /* parent != real_parent */
70 #define PT_TRACE_MASK 0x000003f4
72 /* single stepping state bits (used on ARM and PA-RISC) */
73 #define PT_SINGLESTEP_BIT 31
74 #define PT_SINGLESTEP (1<<PT_SINGLESTEP_BIT)
75 #define PT_BLOCKSTEP_BIT 30
76 #define PT_BLOCKSTEP (1<<PT_BLOCKSTEP_BIT)
78 #include <linux/compiler.h> /* For unlikely. */
79 #include <linux/sched.h> /* For struct task_struct. */
81 extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
82 extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
83 extern int ptrace_attach(struct task_struct *tsk);
84 extern int ptrace_detach(struct task_struct *, unsigned int);
85 extern void ptrace_disable(struct task_struct *);
86 extern int ptrace_check_attach(struct task_struct *task, int kill);
87 extern int ptrace_request(struct task_struct *child, long request, long addr, long data);
88 extern void ptrace_notify(int exit_code);
89 extern void __ptrace_link(struct task_struct *child,
90 struct task_struct *new_parent);
91 extern void __ptrace_unlink(struct task_struct *child);
92 extern void ptrace_untrace(struct task_struct *child);
93 extern int ptrace_may_attach(struct task_struct *task);
95 static inline void ptrace_link(struct task_struct *child,
96 struct task_struct *new_parent)
98 if (unlikely(child->ptrace))
99 __ptrace_link(child, new_parent);
101 static inline void ptrace_unlink(struct task_struct *child)
103 if (unlikely(child->ptrace))
104 __ptrace_unlink(child);
108 #ifndef force_successful_syscall_return
110 * System call handlers that, upon successful completion, need to return a
111 * negative value should call force_successful_syscall_return() right before
112 * returning. On architectures where the syscall convention provides for a
113 * separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly
114 * others), this macro can be used to ensure that the error flag will not get
115 * set. On architectures which do not support a separate error flag, the macro
116 * is a no-op and the spurious error condition needs to be filtered out by some
117 * other means (e.g., in user-level, by passing an extra argument to the
118 * syscall handler, or something along those lines).
120 #define force_successful_syscall_return() do { } while (0)