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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 <string.h>
#include <sys/ptrace.h>
#include "sysdep/ptrace.h"
int save_registers(int pid, struct uml_pt_regs *regs)
{
int err;
err = ptrace(PTRACE_GETREGS, pid, 0, regs->gp);
if (err < 0)
return -errno;
return 0;
}
int restore_registers(int pid, struct uml_pt_regs *regs)
{
int err;
err = ptrace(PTRACE_SETREGS, pid, 0, regs->gp);
if (err < 0)
return -errno;
return 0;
}
/* This is set once at boot time and not changed thereafter */
static unsigned long exec_regs[MAX_REG_NR];
int init_registers(int pid)
{
int err;
err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs);
if (err < 0)
return -errno;
arch_init_registers(pid);
return 0;
}
void get_safe_registers(unsigned long *regs)
{
memcpy(regs, exec_regs, sizeof(exec_regs));
}
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