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/*
* Copyright (C) 2004 PathScale, Inc
* Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include <errno.h>
#include <sys/ptrace.h>
#include <asm/user.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;
int get_fp_registers(int pid, unsigned long *regs)
{
if (have_fpx_regs)
return save_fpx_registers(pid, regs);
else
return save_fp_registers(pid, regs);
}
int put_fp_registers(int pid, unsigned long *regs)
{
if (have_fpx_regs)
return restore_fpx_registers(pid, regs);
else
return restore_fp_registers(pid, regs);
}
void arch_init_registers(int pid)
{
struct user_fxsr_struct fpx_regs;
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;
}
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