linux/arch/um/include/shared/ptrace_user.h
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   1/* 
   2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3 * Licensed under the GPL
   4 */
   5
   6#ifndef __PTRACE_USER_H__
   7#define __PTRACE_USER_H__
   8
   9#include "sysdep/ptrace_user.h"
  10
  11extern int ptrace_getregs(long pid, unsigned long *regs_out);
  12extern int ptrace_setregs(long pid, unsigned long *regs_in);
  13
  14/* syscall emulation path in ptrace */
  15
  16#ifndef PTRACE_SYSEMU
  17#define PTRACE_SYSEMU 31
  18#endif
  19#ifndef PTRACE_SYSEMU_SINGLESTEP
  20#define PTRACE_SYSEMU_SINGLESTEP 32
  21#endif
  22
  23/* On architectures, that started to support PTRACE_O_TRACESYSGOOD
  24 * in linux 2.4, there are two different definitions of
  25 * PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200.
  26 * For binary compatibility, 2.6 also supports the old "21", named
  27 * PTRACE_OLDSETOPTION. On these architectures, UML always must use
  28 * "21", to ensure the kernel runs on 2.4 and 2.6 host without
  29 * recompilation. So, we use PTRACE_OLDSETOPTIONS in UML.
  30 * We also want to be able to build the kernel on 2.4, which doesn't
  31 * have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare
  32 * PTRACE_OLDSETOPTIONS to be the same as PTRACE_SETOPTIONS.
  33 *
  34 * On architectures, that start to support PTRACE_O_TRACESYSGOOD on
  35 * linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't
  36 * supported by the host kernel. In that case, our trick lets us use
  37 * the new 0x4200 with the name PTRACE_OLDSETOPTIONS.
  38 */
  39#ifndef PTRACE_OLDSETOPTIONS
  40#define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS
  41#endif
  42
  43void set_using_sysemu(int value);
  44int get_using_sysemu(void);
  45extern int sysemu_supported;
  46
  47#define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \
  48        (((int[3][3] ) { \
  49                { PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \
  50                { PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \
  51                { PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, \
  52                  PTRACE_SYSEMU_SINGLESTEP } }) \
  53                [sysemu_mode][singlestep_mode])
  54
  55#endif
  56