Logo Search packages:      
Sourcecode: linux version File versions  Download package

registers.c

/*
 * 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;
}

Generated by  Doxygen 1.6.0   Back to index