mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 06:24:53 +08:00
f8b7256096
New helper - sys_mmap_pgoff(); switch syscalls to using it. Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2007-2009 PetaLogix
|
|
* Copyright (C) 2007 John Williams <john.williams@petalogix.com>
|
|
*
|
|
* Copyright (C) 2006 Atmark Techno, Inc.
|
|
* Yasushi SHOJI <yashi@atmark-techno.com>
|
|
* Tetsuya OHKAWA <tetsuya@atmark-techno.com>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/sys.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/file.h>
|
|
#include <linux/module.h>
|
|
#include <linux/err.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/semaphore.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/unistd.h>
|
|
|
|
#include <asm/syscalls.h>
|
|
|
|
asmlinkage long microblaze_vfork(struct pt_regs *regs)
|
|
{
|
|
return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1,
|
|
regs, 0, NULL, NULL);
|
|
}
|
|
|
|
asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs)
|
|
{
|
|
if (!stack)
|
|
stack = regs->r1;
|
|
return do_fork(flags, stack, regs, 0, NULL, NULL);
|
|
}
|
|
|
|
asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv,
|
|
char __user *__user *envp, struct pt_regs *regs)
|
|
{
|
|
int error;
|
|
char *filename;
|
|
|
|
filename = getname(filenamei);
|
|
error = PTR_ERR(filename);
|
|
if (IS_ERR(filename))
|
|
goto out;
|
|
error = do_execve(filename, argv, envp, regs);
|
|
putname(filename);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, off_t pgoff)
|
|
{
|
|
if (pgoff & ~PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
|
|
}
|
|
|
|
/*
|
|
* 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 const char *__a __asm__("r5") = filename;
|
|
register const void *__b __asm__("r6") = argv;
|
|
register const void *__c __asm__("r7") = envp;
|
|
register unsigned long __syscall __asm__("r12") = __NR_execve;
|
|
register unsigned long __ret __asm__("r3");
|
|
__asm__ __volatile__ ("brki r14, 0x8"
|
|
: "=r" (__ret), "=r" (__syscall)
|
|
: "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
|
|
: "r4", "r8", "r9",
|
|
"r10", "r11", "r14", "cc", "memory");
|
|
return __ret;
|
|
}
|