arch/um/sys-x86_64/ptrace_user.c

   1 /*
   2  * Copyright 2003 PathScale, Inc.
   3  *
   4  * Licensed under the GPL
   5  */
   6
   7 #include <stddef.h>
   8 #include <errno.h>
   9 #include "ptrace_user.h"
  10 #include "user.h"
  11 #include "kern_constants.h"
  12
  13 int ptrace_getregs(long pid, unsigned long *regs_out)
  14 {
  15         if(ptrace(PTRACE_GETREGS, pid, 0, regs_out) < 0)
  16                 return(-errno);
  17         return(0);
  18 }
  19
  20 int ptrace_setregs(long pid, unsigned long *regs)
  21 {
  22         if(ptrace(PTRACE_SETREGS, pid, 0, regs) < 0)
  23                 return(-errno);
  24         return(0);
  25 }
  26
  27 void ptrace_pokeuser(unsigned long addr, unsigned long data)
  28 {
  29         panic("ptrace_pokeuser");
  30 }
  31
  32 #define DS 184
  33 #define ES 192
  34 #define __USER_DS     0x2b
  35
  36 void arch_enter_kernel(void *task, int pid)
  37 {
  38 }
  39
  40 void arch_leave_kernel(void *task, int pid)
  41 {
  42 #ifdef UM_USER_CS
  43         if(ptrace(PTRACE_POKEUSR, pid, CS, UM_USER_CS) < 0)
  44                 printk("POKEUSR CS failed");
  45 #endif
  46
  47         if(ptrace(PTRACE_POKEUSR, pid, DS, __USER_DS) < 0)
  48                 printk("POKEUSR DS failed");
  49         if(ptrace(PTRACE_POKEUSR, pid, ES, __USER_DS) < 0)
  50                 printk("POKEUSR ES failed");
  51 }