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 int ptrace_setfpregs(long pid, unsigned long *regs)
  28 {
  29         if (ptrace(PTRACE_SETFPREGS, pid, 0, regs) < 0)
  30                 return -errno;
  31         return 0;
  32 }
  33
  34 void ptrace_pokeuser(unsigned long addr, unsigned long data)
  35 {
  36         panic("ptrace_pokeuser");
  37 }
  38
  39 #define DS 184
  40 #define ES 192
  41 #define __USER_DS     0x2b
  42
  43 void arch_enter_kernel(void *task, int pid)
  44 {
  45 }
  46
  47 void arch_leave_kernel(void *task, int pid)
  48 {
  49 #ifdef UM_USER_CS
  50         if(ptrace(PTRACE_POKEUSR, pid, CS, UM_USER_CS) < 0)
  51                 printk("POKEUSR CS failed");
  52 #endif
  53
  54         if(ptrace(PTRACE_POKEUSR, pid, DS, __USER_DS) < 0)
  55                 printk("POKEUSR DS failed");
  56         if(ptrace(PTRACE_POKEUSR, pid, ES, __USER_DS) < 0)
  57                 printk("POKEUSR ES failed");
  58 }