1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
177 lines
4.0 KiB
C
177 lines
4.0 KiB
C
/*
|
|
* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include "linux/sched.h"
|
|
#include "linux/file.h"
|
|
#include "linux/smp_lock.h"
|
|
#include "linux/mm.h"
|
|
#include "linux/utsname.h"
|
|
#include "linux/msg.h"
|
|
#include "linux/shm.h"
|
|
#include "linux/sys.h"
|
|
#include "linux/syscalls.h"
|
|
#include "linux/unistd.h"
|
|
#include "linux/slab.h"
|
|
#include "linux/utime.h"
|
|
#include "asm/mman.h"
|
|
#include "asm/uaccess.h"
|
|
#include "asm/ipc.h"
|
|
#include "kern_util.h"
|
|
#include "user_util.h"
|
|
#include "sysdep/syscalls.h"
|
|
#include "mode_kern.h"
|
|
#include "choose-mode.h"
|
|
|
|
/* Unlocked, I don't care if this is a bit off */
|
|
int nsyscalls = 0;
|
|
|
|
long sys_fork(void)
|
|
{
|
|
long ret;
|
|
|
|
current->thread.forking = 1;
|
|
ret = do_fork(SIGCHLD, 0, NULL, 0, NULL, NULL);
|
|
current->thread.forking = 0;
|
|
return(ret);
|
|
}
|
|
|
|
long sys_vfork(void)
|
|
{
|
|
long ret;
|
|
|
|
current->thread.forking = 1;
|
|
ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0, NULL, 0, NULL,
|
|
NULL);
|
|
current->thread.forking = 0;
|
|
return(ret);
|
|
}
|
|
|
|
/* common code for old and new mmaps */
|
|
long sys_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
long error = -EBADF;
|
|
struct file * file = NULL;
|
|
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
}
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
if (file)
|
|
fput(file);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
long old_mmap(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long offset)
|
|
{
|
|
long err = -EINVAL;
|
|
if (offset & ~PAGE_MASK)
|
|
goto out;
|
|
|
|
err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
|
|
out:
|
|
return err;
|
|
}
|
|
/*
|
|
* sys_pipe() is the normal C calling standard for creating
|
|
* a pipe. It's not the way unix traditionally does this, though.
|
|
*/
|
|
long sys_pipe(unsigned long __user * fildes)
|
|
{
|
|
int fd[2];
|
|
long error;
|
|
|
|
error = do_pipe(fd);
|
|
if (!error) {
|
|
if (copy_to_user(fildes, fd, sizeof(fd)))
|
|
error = -EFAULT;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
|
|
long sys_uname(struct old_utsname * name)
|
|
{
|
|
long err;
|
|
if (!name)
|
|
return -EFAULT;
|
|
down_read(&uts_sem);
|
|
err=copy_to_user(name, &system_utsname, sizeof (*name));
|
|
up_read(&uts_sem);
|
|
return err?-EFAULT:0;
|
|
}
|
|
|
|
long sys_olduname(struct oldold_utsname * name)
|
|
{
|
|
long error;
|
|
|
|
if (!name)
|
|
return -EFAULT;
|
|
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
|
|
return -EFAULT;
|
|
|
|
down_read(&uts_sem);
|
|
|
|
error = __copy_to_user(&name->sysname,&system_utsname.sysname,
|
|
__OLD_UTS_LEN);
|
|
error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
|
|
error |= __copy_to_user(&name->nodename,&system_utsname.nodename,
|
|
__OLD_UTS_LEN);
|
|
error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
|
|
error |= __copy_to_user(&name->release,&system_utsname.release,
|
|
__OLD_UTS_LEN);
|
|
error |= __put_user(0,name->release+__OLD_UTS_LEN);
|
|
error |= __copy_to_user(&name->version,&system_utsname.version,
|
|
__OLD_UTS_LEN);
|
|
error |= __put_user(0,name->version+__OLD_UTS_LEN);
|
|
error |= __copy_to_user(&name->machine,&system_utsname.machine,
|
|
__OLD_UTS_LEN);
|
|
error |= __put_user(0,name->machine+__OLD_UTS_LEN);
|
|
|
|
up_read(&uts_sem);
|
|
|
|
error = error ? -EFAULT : 0;
|
|
|
|
return error;
|
|
}
|
|
|
|
DEFINE_SPINLOCK(syscall_lock);
|
|
|
|
static int syscall_index = 0;
|
|
|
|
int next_syscall_index(int limit)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock(&syscall_lock);
|
|
ret = syscall_index;
|
|
if(++syscall_index == limit)
|
|
syscall_index = 0;
|
|
spin_unlock(&syscall_lock);
|
|
return(ret);
|
|
}
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|