2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
6 #include "linux/sched.h"
7 #include "linux/file.h"
8 #include "linux/smp_lock.h"
10 #include "linux/utsname.h"
11 #include "linux/msg.h"
12 #include "linux/shm.h"
13 #include "linux/sys.h"
14 #include "linux/syscalls.h"
15 #include "linux/unistd.h"
16 #include "linux/slab.h"
17 #include "linux/utime.h"
19 #include "asm/uaccess.h"
21 #include "kern_util.h"
22 #include "user_util.h"
23 #include "sysdep/syscalls.h"
24 #include "mode_kern.h"
25 #include "choose-mode.h"
27 /* Unlocked, I don't care if this is a bit off */
34 current->thread.forking = 1;
35 ret = do_fork(SIGCHLD, 0, NULL, 0, NULL, NULL);
36 current->thread.forking = 0;
44 current->thread.forking = 1;
45 ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0, NULL, 0, NULL,
47 current->thread.forking = 0;
51 /* common code for old and new mmaps */
52 long sys_mmap2(unsigned long addr, unsigned long len,
53 unsigned long prot, unsigned long flags,
54 unsigned long fd, unsigned long pgoff)
57 struct file * file = NULL;
59 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
60 if (!(flags & MAP_ANONYMOUS)) {
66 down_write(¤t->mm->mmap_sem);
67 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
68 up_write(¤t->mm->mmap_sem);
76 long old_mmap(unsigned long addr, unsigned long len,
77 unsigned long prot, unsigned long flags,
78 unsigned long fd, unsigned long offset)
81 if (offset & ~PAGE_MASK)
84 err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
89 * sys_pipe() is the normal C calling standard for creating
90 * a pipe. It's not the way unix traditionally does this, though.
92 long sys_pipe(unsigned long __user * fildes)
99 if (copy_to_user(fildes, fd, sizeof(fd)))
106 long sys_uname(struct old_utsname * name)
112 err=copy_to_user(name, &system_utsname, sizeof (*name));
114 return err?-EFAULT:0;
117 long sys_olduname(struct oldold_utsname * name)
123 if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
128 error = __copy_to_user(&name->sysname,&system_utsname.sysname,
130 error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
131 error |= __copy_to_user(&name->nodename,&system_utsname.nodename,
133 error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
134 error |= __copy_to_user(&name->release,&system_utsname.release,
136 error |= __put_user(0,name->release+__OLD_UTS_LEN);
137 error |= __copy_to_user(&name->version,&system_utsname.version,
139 error |= __put_user(0,name->version+__OLD_UTS_LEN);
140 error |= __copy_to_user(&name->machine,&system_utsname.machine,
142 error |= __put_user(0,name->machine+__OLD_UTS_LEN);
146 error = error ? -EFAULT : 0;
151 DEFINE_SPINLOCK(syscall_lock);
153 static int syscall_index = 0;
155 int next_syscall_index(int limit)
159 spin_lock(&syscall_lock);
161 if(++syscall_index == limit)
163 spin_unlock(&syscall_lock);
168 * Overrides for Emacs so that we follow Linus's tabbing style.
169 * Emacs will notice this stuff at the end of the file and automatically
170 * adjust the settings for this buffer only. This must remain at the end
172 * ---------------------------------------------------------------------------
174 * c-file-style: "linux"