linux/arch/score/kernel/sys_score.c
Al Viro 1856ab6db1 score: switch to generic kernel_thread()/kernel_execve()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-15 16:12:06 -04:00

110 lines
2.9 KiB
C

/*
* arch/score/kernel/syscall.c
*
* Score Processor version.
*
* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
* Chen Liqin <liqin.chen@sunplusct.com>
* Lennox Wu <lennox.wu@sunplusct.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/unistd.h>
#include <linux/syscalls.h>
#include <asm/syscalls.h>
asmlinkage long
sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
unsigned long flags, unsigned long fd, unsigned long pgoff)
{
return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
}
asmlinkage long
sys_mmap(unsigned long addr, unsigned long len, unsigned long prot,
unsigned long flags, unsigned long fd, off_t offset)
{
if (unlikely(offset & ~PAGE_MASK))
return -EINVAL;
return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
}
asmlinkage long
score_fork(struct pt_regs *regs)
{
return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL);
}
/*
* Clone a task - this clones the calling program thread.
* This is called indirectly via a small wrapper
*/
asmlinkage long
score_clone(struct pt_regs *regs)
{
unsigned long clone_flags;
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs->regs[4];
newsp = regs->regs[5];
if (!newsp)
newsp = regs->regs[0];
parent_tidptr = (int __user *)regs->regs[6];
child_tidptr = (int __user *)regs->regs[8];
return do_fork(clone_flags, newsp, regs, 0,
parent_tidptr, child_tidptr);
}
asmlinkage long
score_vfork(struct pt_regs *regs)
{
return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
regs->regs[0], regs, 0, NULL, NULL);
}
/*
* sys_execve() executes a new program.
* This is called indirectly via a small wrapper
*/
asmlinkage long
score_execve(struct pt_regs *regs)
{
int error;
struct filename *filename;
filename = getname((char __user*)regs->regs[4]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
error = do_execve(filename->name,
(const char __user *const __user *)regs->regs[5],
(const char __user *const __user *)regs->regs[6],
regs);
putname(filename);
return error;
}