text: /*
   * Copyright (C) 2004 PathScale, Inc
   * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   * Licensed under the GPL
   */
  
  #include <errno.h>
  #include "kern_constants.h"
  #include "longjmp.h"
  #include "user.h"
  #include "sysdep/ptrace_user.h"
  
  int save_fp_registers(int pid, unsigned long *fp_regs)
  {
  	if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
  		return -errno;
  	return 0;
  }
  
  int restore_fp_registers(int pid, unsigned long *fp_regs)
  {
  	if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
  		return -errno;
  	return 0;
  }
  
  int save_fpx_registers(int pid, unsigned long *fp_regs)
  {
  	if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
  		return -errno;
  	return 0;
  }
  
  int restore_fpx_registers(int pid, unsigned long *fp_regs)
  {
  	if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
  		return -errno;
  	return 0;
  }
  
  unsigned long get_thread_reg(int reg, jmp_buf *buf)
  {
  	switch (reg) {
  	case EIP:
  		return buf[0]->__eip;
  	case UESP:
  		return buf[0]->__esp;
  	case EBP:
  		return buf[0]->__ebp;
  	default:
  		printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
  		       reg);
  		return 0;
  	}
  }
  
  int have_fpx_regs = 1;
  
  void arch_init_registers(int pid)
  {
  	unsigned long fpx_regs[HOST_XFP_SIZE];
  	int err;
  
  	err = ptrace(PTRACE_GETFPXREGS, pid, 0, fpx_regs);
  	if(!err)
  		return;
  
  	if(errno != EIO)
  		panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
  		      errno);
  
  	have_fpx_regs = 0;
  }
  