forked from Minki/linux
134 lines
3.5 KiB
C
134 lines
3.5 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/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;
|
|
char *filename;
|
|
|
|
filename = getname((char __user*)regs->regs[4]);
|
|
error = PTR_ERR(filename);
|
|
if (IS_ERR(filename))
|
|
return error;
|
|
|
|
error = do_execve(filename, (char __user *__user*)regs->regs[5],
|
|
(char __user *__user *) regs->regs[6], regs);
|
|
|
|
putname(filename);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Do a system call from kernel instead of calling sys_execve so we
|
|
* end up with proper pt_regs.
|
|
*/
|
|
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
|
|
{
|
|
register unsigned long __r4 asm("r4") = (unsigned long) filename;
|
|
register unsigned long __r5 asm("r5") = (unsigned long) argv;
|
|
register unsigned long __r6 asm("r6") = (unsigned long) envp;
|
|
register unsigned long __r7 asm("r7");
|
|
|
|
__asm__ __volatile__ (" \n"
|
|
"ldi r27, %5 \n"
|
|
"syscall \n"
|
|
"mv %0, r4 \n"
|
|
"mv %1, r7 \n"
|
|
: "=&r" (__r4), "=r" (__r7)
|
|
: "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve)
|
|
: "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25",
|
|
"r26", "r27", "memory");
|
|
|
|
if (__r7 == 0)
|
|
return __r4;
|
|
|
|
return -__r4;
|
|
}
|