sys.c

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/*
 * linux/arch/unicore32/kernel/sys.c
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2010 GUAN Xue-tao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/stat.h>
#include <linux/syscalls.h>
#include <linux/mman.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/ipc.h>
#include <linux/uaccess.h>

#include <asm/syscalls.h>
#include <asm/cacheflush.h>

/* Clone a task - this clones the calling program thread.
 * This is called indirectly via a small wrapper
 */
asmlinkage long __sys_clone(unsigned long clone_flags, unsigned long newsp,
             void __user *parent_tid, void __user *child_tid,
             struct pt_regs *regs)
{
    if (!newsp)
        newsp = regs->UCreg_sp;

    return do_fork(clone_flags, newsp, regs, 0,
            parent_tid, child_tid);
}

/* Note: used by the compat code even in 64-bit Linux. */
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
        unsigned long, prot, unsigned long, flags,
        unsigned long, fd, unsigned long, off_4k)
{
    return sys_mmap_pgoff(addr, len, prot, flags, fd,
                  off_4k);
}

/* Provide the actual syscall number to call mapping. */
#undef __SYSCALL
#define __SYSCALL(nr, call) [nr] = (call),

/* Note that we don't include <linux/unistd.h> but <asm/unistd.h> */
void *sys_call_table[__NR_syscalls] = {
    [0 ... __NR_syscalls-1] = sys_ni_syscall,
#include <asm/unistd.h>
};