arch/um/include/ptrace_user.h

   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
  11 extern int ptrace_getregs(long pid, unsigned long *regs_out);
  12 extern int ptrace_setregs(long pid, unsigned long *regs_in);
  13 extern int ptrace_getfpregs(long pid, unsigned long *regs_out);
  14 extern int ptrace_setfpregs(long pid, unsigned long *regs);
  15 extern void arch_enter_kernel(void *task, int pid);
  16 extern void arch_leave_kernel(void *task, int pid);
  17 extern 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
  49 void set_using_sysemu(int value);
  50 int get_using_sysemu(void);
  51 extern 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