linux-old/include/linux/ptrace.h
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   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
  24#include <asm/ptrace.h>
  25
  26#ifdef __KERNEL__
  27
  28#ifndef force_successful_syscall_return
  29/*
  30 * System call handlers that, upon successful completion, need to return a
  31 * negative value should call force_successful_syscall_return() right before
  32 * returning.  On architectures where the syscall convention provides for a
  33 * separate error flag (e.g., alpha, ia64, ppc{,64}, sparc{,64}, possibly
  34 * others), this macro can be used to ensure that the error flag will not get
  35 * set.  On architectures which do not support a separate error flag, the macro
  36 * is a no-op and the spurious error condition needs to be filtered out by some
  37 * other means (e.g., in user-level, by passing an extra argument to the
  38 * syscall handler, or something along those lines).
  39 */
  40#define force_successful_syscall_return() do { } while (0)
  41#endif
  42#endif
  43
  44#endif
  45
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