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1da177e4 LT |
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 | ||
416bc512 RM |
19 | #define PTRACE_ATTACH 16 |
20 | #define PTRACE_DETACH 17 | |
1da177e4 LT |
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 | |
260ea101 EB |
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. | |
1da177e4 LT |
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 | ||
481bed45 CH |
83 | |
84 | extern long arch_ptrace(struct task_struct *child, long request, long addr, long data); | |
6b9c7ed8 CH |
85 | extern struct task_struct *ptrace_get_task_struct(pid_t pid); |
86 | extern int ptrace_traceme(void); | |
1da177e4 LT |
87 | extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len); |
88 | extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len); | |
89 | extern int ptrace_attach(struct task_struct *tsk); | |
90 | extern int ptrace_detach(struct task_struct *, unsigned int); | |
91 | extern void ptrace_disable(struct task_struct *); | |
92 | extern int ptrace_check_attach(struct task_struct *task, int kill); | |
93 | extern int ptrace_request(struct task_struct *child, long request, long addr, long data); | |
94 | extern void ptrace_notify(int exit_code); | |
95 | extern void __ptrace_link(struct task_struct *child, | |
96 | struct task_struct *new_parent); | |
97 | extern void __ptrace_unlink(struct task_struct *child); | |
98 | extern void ptrace_untrace(struct task_struct *child); | |
ab8d11be | 99 | extern int ptrace_may_attach(struct task_struct *task); |
831830b5 | 100 | extern int __ptrace_may_attach(struct task_struct *task); |
1da177e4 LT |
101 | |
102 | static inline void ptrace_link(struct task_struct *child, | |
103 | struct task_struct *new_parent) | |
104 | { | |
105 | if (unlikely(child->ptrace)) | |
106 | __ptrace_link(child, new_parent); | |
107 | } | |
108 | static inline void ptrace_unlink(struct task_struct *child) | |
109 | { | |
110 | if (unlikely(child->ptrace)) | |
111 | __ptrace_unlink(child); | |
112 | } | |
113 | ||
76647323 | 114 | int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data); |
f284ce72 | 115 | int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data); |
1da177e4 LT |
116 | |
117 | #ifndef force_successful_syscall_return | |
118 | /* | |
119 | * System call handlers that, upon successful completion, need to return a | |
120 | * negative value should call force_successful_syscall_return() right before | |
121 | * returning. On architectures where the syscall convention provides for a | |
122 | * separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly | |
123 | * others), this macro can be used to ensure that the error flag will not get | |
124 | * set. On architectures which do not support a separate error flag, the macro | |
125 | * is a no-op and the spurious error condition needs to be filtered out by some | |
126 | * other means (e.g., in user-level, by passing an extra argument to the | |
127 | * syscall handler, or something along those lines). | |
128 | */ | |
129 | #define force_successful_syscall_return() do { } while (0) | |
130 | #endif | |
131 | ||
fb7fa8f1 RM |
132 | /* |
133 | * <asm/ptrace.h> should define the following things inside #ifdef __KERNEL__. | |
134 | * | |
135 | * These do-nothing inlines are used when the arch does not | |
136 | * implement single-step. The kerneldoc comments are here | |
137 | * to document the interface for all arch definitions. | |
138 | */ | |
139 | ||
140 | #ifndef arch_has_single_step | |
141 | /** | |
142 | * arch_has_single_step - does this CPU support user-mode single-step? | |
143 | * | |
144 | * If this is defined, then there must be function declarations or | |
145 | * inlines for user_enable_single_step() and user_disable_single_step(). | |
146 | * arch_has_single_step() should evaluate to nonzero iff the machine | |
147 | * supports instruction single-step for user mode. | |
148 | * It can be a constant or it can test a CPU feature bit. | |
149 | */ | |
150 | #define arch_has_single_step() (0) | |
151 | ||
152 | /** | |
153 | * user_enable_single_step - single-step in user-mode task | |
154 | * @task: either current or a task stopped in %TASK_TRACED | |
155 | * | |
156 | * This can only be called when arch_has_single_step() has returned nonzero. | |
157 | * Set @task so that when it returns to user mode, it will trap after the | |
158 | * next single instruction executes. | |
159 | */ | |
160 | static inline void user_enable_single_step(struct task_struct *task) | |
161 | { | |
162 | BUG(); /* This can never be called. */ | |
163 | } | |
164 | ||
165 | /** | |
166 | * user_disable_single_step - cancel user-mode single-step | |
167 | * @task: either current or a task stopped in %TASK_TRACED | |
168 | * | |
169 | * Clear @task of the effects of user_enable_single_step(). This can | |
170 | * be called whether or not user_enable_single_step() was ever called | |
171 | * on @task, and even if arch_has_single_step() returned zero. | |
172 | */ | |
173 | static inline void user_disable_single_step(struct task_struct *task) | |
174 | { | |
175 | } | |
176 | #endif /* arch_has_single_step */ | |
177 | ||
1da177e4 LT |
178 | #endif |
179 | ||
180 | #endif |