include/linux/ptrace.h

   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
  84 extern long arch_ptrace(struct task_struct *child, long request, long addr, long data);
  85 extern struct task_struct *ptrace_get_task_struct(pid_t pid);
  86 extern int ptrace_traceme(void);
  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);
  99 extern int ptrace_may_attach(struct task_struct *task);
 100
 101 static 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 }
 107 static inline void ptrace_unlink(struct task_struct *child)
 108 {
 109         if (unlikely(child->ptrace))
 110                 __ptrace_unlink(child);
 111 }
 112
 113 int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data);
 114
 115 #ifndef force_successful_syscall_return
 116 /*
 117  * System call handlers that, upon successful completion, need to return a
 118  * negative value should call force_successful_syscall_return() right before
 119  * returning.  On architectures where the syscall convention provides for a
 120  * separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly
 121  * others), this macro can be used to ensure that the error flag will not get
 122  * set.  On architectures which do not support a separate error flag, the macro
 123  * is a no-op and the spurious error condition needs to be filtered out by some
 124  * other means (e.g., in user-level, by passing an extra argument to the
 125  * syscall handler, or something along those lines).
 126  */
 127 #define force_successful_syscall_return() do { } while (0)
 128 #endif
 129
 130 #endif
 131
 132 #endif