2 * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Copyright 2003 PathScale, Inc.
5 * Licensed under the GPL
8 #include <linux/sched.h>
9 #include <linux/sched/mm.h>
10 #include <linux/syscalls.h>
11 #include <linux/uaccess.h>
12 #include <asm/prctl.h> /* XXX This should get the constants from libc */
13 #include <registers.h>
16 long arch_prctl(struct task_struct *task, int option,
17 unsigned long __user *arg2)
23 current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)] =
28 current->thread.regs.regs.gp[GS_BASE / sizeof(unsigned long)] =
33 ret = put_user(current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)], arg2);
36 ret = put_user(current->thread.regs.regs.gp[GS_BASE / sizeof(unsigned long)], arg2);
43 SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
45 return arch_prctl(current, option, (unsigned long __user *) arg2);
48 void arch_switch_to(struct task_struct *to)
51 * Nothing needs to be done on x86_64.
52 * The FS_BASE/GS_BASE registers are saved in the ptrace register set.
56 SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
57 unsigned long, prot, unsigned long, flags,
58 unsigned long, fd, unsigned long, off)
63 return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);