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 0x10
20#define PTRACE_DETACH 0x11
21
22#define PTRACE_SYSCALL 24
23#define PTRACE_SYSEMU 31
24#define PTRACE_SYSEMU_SINGLESTEP 32
25
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
31
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
40
41#define PTRACE_O_MASK 0x0000007f
42
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
50
51#include <asm/ptrace.h>
52
53#ifdef __KERNEL__
54/*
55 * Ptrace flags
56 */
57
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 */
69
70#define PT_TRACE_MASK 0x000003f4
71
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)
77
78#include <linux/compiler.h> /* For unlikely. */
79#include <linux/sched.h> /* For struct task_struct. */
80
81
82extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
83extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
84extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
85extern int ptrace_attach(struct task_struct *tsk);
86extern int ptrace_detach(struct task_struct *, unsigned int);
87extern void ptrace_disable(struct task_struct *);
88extern int ptrace_check_attach(struct task_struct *task, int kill);
89extern int ptrace_request(struct task_struct *child, long request, long addr, long data);
90extern void ptrace_notify(int exit_code);
91extern void __ptrace_link(struct task_struct *child,
92 struct task_struct *new_parent);
93extern void __ptrace_unlink(struct task_struct *child);
94extern void ptrace_untrace(struct task_struct *child);
95extern int ptrace_may_attach(struct task_struct *task);
96
97static inline void ptrace_link(struct task_struct *child,
98 struct task_struct *new_parent)
99{
100 if (unlikely(child->ptrace))
101 __ptrace_link(child, new_parent);
102}
103static inline void ptrace_unlink(struct task_struct *child)
104{
105 if (unlikely(child->ptrace))
106 __ptrace_unlink(child);
107}
108
109
110#ifndef force_successful_syscall_return
111/*
112 * System call handlers that, upon successful completion, need to return a
113 * negative value should call force_successful_syscall_return() right before
114 * returning. On architectures where the syscall convention provides for a
115 * separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly
116 * others), this macro can be used to ensure that the error flag will not get
117 * set. On architectures which do not support a separate error flag, the macro
118 * is a no-op and the spurious error condition needs to be filtered out by some
119 * other means (e.g., in user-level, by passing an extra argument to the
120 * syscall handler, or something along those lines).
121 */
122#define force_successful_syscall_return() do { } while (0)
123#endif
124
125#endif
126
127#endif