LXR linux/arch/um/include/ptrace

   1/* 
   2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.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);
  13extern int ptrace_getfpregs(long pid, unsigned long *regs_out);
  14extern int ptrace_setfpregs(long pid, unsigned long *regs);
  15extern void arch_enter_kernel(void *task, int pid);
  16extern void arch_leave_kernel(void *task, int pid);
  17extern void ptrace_pokeuser(unsigned long addr, unsigned long data);
  18
  19
  20/* syscall emulation path in ptrace */
  21
  22#ifndef PTRACE_SYSEMU
  23#define PTRACE_SYSEMU 31
  24#endif
  25#ifndef PTRACE_SYSEMU_SINGLESTEP
  26#define PTRACE_SYSEMU_SINGLESTEP 32
  27#endif
  28
  29/* On architectures, that started to support PTRACE_O_TRACESYSGOOD
  30 * in linux 2.4, there are two different definitions of
  31 * PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200.
  32 * For binary compatibility, 2.6 also supports the old "21", named
  33 * PTRACE_OLDSETOPTION. On these architectures, UML always must use
  34 * "21", to ensure the kernel runs on 2.4 and 2.6 host without
  35 * recompilation. So, we use PTRACE_OLDSETOPTIONS in UML.
  36 * We also want to be able to build the kernel on 2.4, which doesn't
  37 * have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare
  38 * PTRACE_OLDSETOPTIONS to to be the same as PTRACE_SETOPTIONS.
  39 *
  40 * On architectures, that start to support PTRACE_O_TRACESYSGOOD on
  41 * linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't
  42 * supported by the host kernel. In that case, our trick lets us use
  43 * the new 0x4200 with the name PTRACE_OLDSETOPTIONS.
  44 */
  45#ifndef PTRACE_OLDSETOPTIONS
  46#define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS
  47#endif
  48
  49void set_using_sysemu(int value);
  50int get_using_sysemu(void);
  51extern int sysemu_supported;
  52
  53#define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \
  54        (((int[3][3] ) { \
  55                { PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \
  56                { PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \
  57                { PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, PTRACE_SYSEMU_SINGLESTEP }}) \
  58                [sysemu_mode][singlestep_mode])
  59
  60#endif
  61