Commit | Line | Data |
---|---|---|
1d3468a6 | 1 | /* |
ba180fd4 | 2 | * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
1da177e4 | 6 | #include "linux/file.h" |
4e950f6f | 7 | #include "linux/fs.h" |
ba180fd4 JD |
8 | #include "linux/mm.h" |
9 | #include "linux/sched.h" | |
1da177e4 | 10 | #include "linux/utsname.h" |
ba180fd4 | 11 | #include "asm/current.h" |
1da177e4 LT |
12 | #include "asm/mman.h" |
13 | #include "asm/uaccess.h" | |
ba180fd4 | 14 | #include "asm/unistd.h" |
1da177e4 | 15 | |
1da177e4 LT |
16 | long sys_fork(void) |
17 | { | |
18 | long ret; | |
19 | ||
20 | current->thread.forking = 1; | |
e0877f07 JD |
21 | ret = do_fork(SIGCHLD, UPT_SP(¤t->thread.regs.regs), |
22 | ¤t->thread.regs, 0, NULL, NULL); | |
1da177e4 | 23 | current->thread.forking = 0; |
ba180fd4 | 24 | return ret; |
1da177e4 LT |
25 | } |
26 | ||
27 | long sys_vfork(void) | |
28 | { | |
29 | long ret; | |
30 | ||
31 | current->thread.forking = 1; | |
e0877f07 JD |
32 | ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, |
33 | UPT_SP(¤t->thread.regs.regs), | |
34 | ¤t->thread.regs, 0, NULL, NULL); | |
1da177e4 | 35 | current->thread.forking = 0; |
ba180fd4 | 36 | return ret; |
1da177e4 LT |
37 | } |
38 | ||
39 | /* common code for old and new mmaps */ | |
40 | long sys_mmap2(unsigned long addr, unsigned long len, | |
41 | unsigned long prot, unsigned long flags, | |
42 | unsigned long fd, unsigned long pgoff) | |
43 | { | |
44 | long error = -EBADF; | |
45 | struct file * file = NULL; | |
46 | ||
47 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
48 | if (!(flags & MAP_ANONYMOUS)) { | |
49 | file = fget(fd); | |
50 | if (!file) | |
51 | goto out; | |
52 | } | |
53 | ||
54 | down_write(¤t->mm->mmap_sem); | |
55 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
56 | up_write(¤t->mm->mmap_sem); | |
57 | ||
58 | if (file) | |
59 | fput(file); | |
60 | out: | |
61 | return error; | |
62 | } | |
63 | ||
64 | long old_mmap(unsigned long addr, unsigned long len, | |
65 | unsigned long prot, unsigned long flags, | |
66 | unsigned long fd, unsigned long offset) | |
67 | { | |
68 | long err = -EINVAL; | |
69 | if (offset & ~PAGE_MASK) | |
70 | goto out; | |
71 | ||
72 | err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | |
73 | out: | |
74 | return err; | |
75 | } | |
1da177e4 | 76 | |
4d338e1a | 77 | long sys_uname(struct old_utsname __user * name) |
1da177e4 LT |
78 | { |
79 | long err; | |
80 | if (!name) | |
81 | return -EFAULT; | |
82 | down_read(&uts_sem); | |
e9ff3990 | 83 | err = copy_to_user(name, utsname(), sizeof (*name)); |
1da177e4 LT |
84 | up_read(&uts_sem); |
85 | return err?-EFAULT:0; | |
86 | } | |
87 | ||
4d338e1a | 88 | long sys_olduname(struct oldold_utsname __user * name) |
1da177e4 LT |
89 | { |
90 | long error; | |
91 | ||
92 | if (!name) | |
93 | return -EFAULT; | |
94 | if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) | |
95 | return -EFAULT; | |
1d3468a6 | 96 | |
ba180fd4 | 97 | down_read(&uts_sem); |
1d3468a6 | 98 | |
e9ff3990 | 99 | error = __copy_to_user(&name->sysname, &utsname()->sysname, |
1da177e4 | 100 | __OLD_UTS_LEN); |
e9ff3990 SH |
101 | error |= __put_user(0, name->sysname + __OLD_UTS_LEN); |
102 | error |= __copy_to_user(&name->nodename, &utsname()->nodename, | |
1da177e4 | 103 | __OLD_UTS_LEN); |
e9ff3990 SH |
104 | error |= __put_user(0, name->nodename + __OLD_UTS_LEN); |
105 | error |= __copy_to_user(&name->release, &utsname()->release, | |
1da177e4 | 106 | __OLD_UTS_LEN); |
e9ff3990 SH |
107 | error |= __put_user(0, name->release + __OLD_UTS_LEN); |
108 | error |= __copy_to_user(&name->version, &utsname()->version, | |
1da177e4 | 109 | __OLD_UTS_LEN); |
e9ff3990 SH |
110 | error |= __put_user(0, name->version + __OLD_UTS_LEN); |
111 | error |= __copy_to_user(&name->machine, &utsname()->machine, | |
1da177e4 | 112 | __OLD_UTS_LEN); |
e9ff3990 | 113 | error |= __put_user(0, name->machine + __OLD_UTS_LEN); |
1d3468a6 | 114 | |
1da177e4 | 115 | up_read(&uts_sem); |
1d3468a6 | 116 | |
1da177e4 LT |
117 | error = error ? -EFAULT : 0; |
118 | ||
119 | return error; | |
120 | } | |
121 | ||
3db03b4a AB |
122 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) |
123 | { | |
124 | mm_segment_t fs; | |
125 | int ret; | |
126 | ||
127 | fs = get_fs(); | |
128 | set_fs(KERNEL_DS); | |
129 | ret = um_execve(filename, argv, envp); | |
130 | set_fs(fs); | |
131 | ||
132 | return ret; | |
133 | } |