Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_PTRACE_H
2#define _LINUX_PTRACE_H
3/* ptrace.h */
4/* structs and defines to help the user use the ptrace system call. */
5
6/* has the defines to get at the registers. */
7
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
15#define PTRACE_CONT 7
16#define PTRACE_KILL 8
17#define PTRACE_SINGLESTEP 9
18
19#define PTRACE_ATTACH 16
20#define PTRACE_DETACH 17
21
22#define PTRACE_SYSCALL 24
23
24/* 0x4200-0x4300 are reserved for architecture-independent additions. */
25#define PTRACE_SETOPTIONS 0x4200
26#define PTRACE_GETEVENTMSG 0x4201
27#define PTRACE_GETSIGINFO 0x4202
28#define PTRACE_SETSIGINFO 0x4203
29
30/* options set using PTRACE_SETOPTIONS */
31#define PTRACE_O_TRACESYSGOOD 0x00000001
32#define PTRACE_O_TRACEFORK 0x00000002
33#define PTRACE_O_TRACEVFORK 0x00000004
34#define PTRACE_O_TRACECLONE 0x00000008
35#define PTRACE_O_TRACEEXEC 0x00000010
36#define PTRACE_O_TRACEVFORKDONE 0x00000020
37#define PTRACE_O_TRACEEXIT 0x00000040
38
39#define PTRACE_O_MASK 0x0000007f
40
41/* Wait extended result codes for the above trace options. */
42#define PTRACE_EVENT_FORK 1
43#define PTRACE_EVENT_VFORK 2
44#define PTRACE_EVENT_CLONE 3
45#define PTRACE_EVENT_EXEC 4
46#define PTRACE_EVENT_VFORK_DONE 5
47#define PTRACE_EVENT_EXIT 6
48
49#include <asm/ptrace.h>
50
51#ifdef __KERNEL__
52/*
53 * Ptrace flags
54 *
55 * The owner ship rules for task->ptrace which holds the ptrace
56 * flags is simple. When a task is running it owns it's task->ptrace
57 * flags. When the a task is stopped the ptracer owns task->ptrace.
58 */
59
60#define PT_PTRACED 0x00000001
61#define PT_DTRACE 0x00000002 /* delayed trace (used on m68k, i386) */
62#define PT_TRACESYSGOOD 0x00000004
63#define PT_PTRACE_CAP 0x00000008 /* ptracer can follow suid-exec */
64#define PT_TRACE_FORK 0x00000010
65#define PT_TRACE_VFORK 0x00000020
66#define PT_TRACE_CLONE 0x00000040
67#define PT_TRACE_EXEC 0x00000080
68#define PT_TRACE_VFORK_DONE 0x00000100
69#define PT_TRACE_EXIT 0x00000200
70#define PT_ATTACHED 0x00000400 /* parent != real_parent */
71
72#define PT_TRACE_MASK 0x000003f4
73
74/* single stepping state bits (used on ARM and PA-RISC) */
75#define PT_SINGLESTEP_BIT 31
76#define PT_SINGLESTEP (1<<PT_SINGLESTEP_BIT)
77#define PT_BLOCKSTEP_BIT 30
78#define PT_BLOCKSTEP (1<<PT_BLOCKSTEP_BIT)
79
80#include <linux/compiler.h> /* For unlikely. */
81#include <linux/sched.h> /* For struct task_struct. */
82
83
84extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
85extern struct task_struct *ptrace_get_task_struct(pid_t pid);
86extern int ptrace_traceme(void);
87extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
88extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
89extern int ptrace_attach(struct task_struct *tsk);
90extern int ptrace_detach(struct task_struct *, unsigned int);
91extern void ptrace_disable(struct task_struct *);
92extern int ptrace_check_attach(struct task_struct *task, int kill);
93extern int ptrace_request(struct task_struct *child, long request, long addr, long data);
94extern void ptrace_notify(int exit_code);
95extern void __ptrace_link(struct task_struct *child,
96 struct task_struct *new_parent);
97extern void __ptrace_unlink(struct task_struct *child);
98extern void ptrace_untrace(struct task_struct *child);
99extern int ptrace_may_attach(struct task_struct *task);
100
101static inline void ptrace_link(struct task_struct *child,
102 struct task_struct *new_parent)
103{
104 if (unlikely(child->ptrace))
105 __ptrace_link(child, new_parent);
106}
107static inline void ptrace_unlink(struct task_struct *child)
108{
109 if (unlikely(child->ptrace))
110 __ptrace_unlink(child);
111}
112
113
114#ifndef force_successful_syscall_return
115/*
116 * System call handlers that, upon successful completion, need to return a
117 * negative value should call force_successful_syscall_return() right before
118 * returning. On architectures where the syscall convention provides for a
119 * separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly
120 * others), this macro can be used to ensure that the error flag will not get
121 * set. On architectures which do not support a separate error flag, the macro
122 * is a no-op and the spurious error condition needs to be filtered out by some
123 * other means (e.g., in user-level, by passing an extra argument to the
124 * syscall handler, or something along those lines).
125 */
126#define force_successful_syscall_return() do { } while (0)
127#endif
128
129#endif
130
131#endif