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/*
* Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright 2003 PathScale, Inc.
*
* Licensed under the GPL
*/
#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/syscalls.h>
#include <linux/uaccess.h>
#include <asm/prctl.h> /* XXX This should get the constants from libc */
#include <registers.h>
#include <os.h>
long arch_prctl(struct task_struct *task, int option,
unsigned long __user *arg2)
{
long ret = -EINVAL;
switch (option) {
case ARCH_SET_FS:
current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)] =
(unsigned long) arg2;
ret = 0;
break;
case ARCH_SET_GS:
current->thread.regs.regs.gp[GS_BASE / sizeof(unsigned long)] =
(unsigned long) arg2;
ret = 0;
break;
case ARCH_GET_FS:
ret = put_user(current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)], arg2);
break;
case ARCH_GET_GS:
ret = put_user(current->thread.regs.regs.gp[GS_BASE / sizeof(unsigned long)], arg2);
break;
}
return ret;
}
SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
{
return arch_prctl(current, option, (unsigned long __user *) arg2);
}
void arch_switch_to(struct task_struct *to)
{
/*
* Nothing needs to be done on x86_64.
* The FS_BASE/GS_BASE registers are saved in the ptrace register set.
*/
}
SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, unsigned long, off)
{
if (off & ~PAGE_MASK)
return -EINVAL;
return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
}
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