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/*
* 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_mmap2(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
struct file *file = NULL;
int ret = -EBADF;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file) {
printk(KERN_INFO "no fd in mmap\r\n");
goto out;
}
}
down_write(¤t->mm->mmap_sem);
ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(¤t->mm->mmap_sem);
if (file)
fput(file);
out:
return ret;
}
asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, off_t pgoff)
{
int err = -EINVAL;
if (pgoff & ~PAGE_MASK) {
printk(KERN_INFO "no pagemask in mmap\r\n");
goto out;
}
err = sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
out:
return err;
}
/*
* 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;
}
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