registers.c

/*
 * Copyright (C) 2006 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#include <errno.h>
#include <sys/ptrace.h>
#define __FRAME_OFFSETS
#include <asm/ptrace.h>
#include "kern_constants.h"
#include "longjmp.h"
#include "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;
}

unsigned long get_thread_reg(int reg, jmp_buf *buf)
{
	switch (reg) {
	case RIP:
		return buf[0]->__rip;
	case RSP:
		return buf[0]->__rsp;
	case RBP:
		return buf[0]->__rbp;
	default:
		printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
		       reg);
		return 0;
	}
}

int get_fp_registers(int pid, unsigned long *regs)
{
	return save_fp_registers(pid, regs);
}

int put_fp_registers(int pid, unsigned long *regs)
{
	return restore_fp_registers(pid, regs);
}