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" |
ff64b4c1 | 15 | #include "internal.h" |
1da177e4 | 16 | |
1da177e4 LT |
17 | long sys_fork(void) |
18 | { | |
19 | long ret; | |
20 | ||
21 | current->thread.forking = 1; | |
e0877f07 JD |
22 | ret = do_fork(SIGCHLD, UPT_SP(¤t->thread.regs.regs), |
23 | ¤t->thread.regs, 0, NULL, NULL); | |
1da177e4 | 24 | current->thread.forking = 0; |
ba180fd4 | 25 | return ret; |
1da177e4 LT |
26 | } |
27 | ||
28 | long sys_vfork(void) | |
29 | { | |
30 | long ret; | |
31 | ||
32 | current->thread.forking = 1; | |
e0877f07 JD |
33 | ret = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, |
34 | UPT_SP(¤t->thread.regs.regs), | |
35 | ¤t->thread.regs, 0, NULL, NULL); | |
1da177e4 | 36 | current->thread.forking = 0; |
ba180fd4 | 37 | return ret; |
1da177e4 LT |
38 | } |
39 | ||
40 | /* common code for old and new mmaps */ | |
41 | long sys_mmap2(unsigned long addr, unsigned long len, | |
42 | unsigned long prot, unsigned long flags, | |
43 | unsigned long fd, unsigned long pgoff) | |
44 | { | |
45 | long error = -EBADF; | |
46 | struct file * file = NULL; | |
47 | ||
48 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
49 | if (!(flags & MAP_ANONYMOUS)) { | |
50 | file = fget(fd); | |
51 | if (!file) | |
52 | goto out; | |
53 | } | |
54 | ||
55 | down_write(¤t->mm->mmap_sem); | |
56 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
57 | up_write(¤t->mm->mmap_sem); | |
58 | ||
59 | if (file) | |
60 | fput(file); | |
61 | out: | |
62 | return error; | |
63 | } | |
64 | ||
65 | long old_mmap(unsigned long addr, unsigned long len, | |
66 | unsigned long prot, unsigned long flags, | |
67 | unsigned long fd, unsigned long offset) | |
68 | { | |
69 | long err = -EINVAL; | |
70 | if (offset & ~PAGE_MASK) | |
71 | goto out; | |
72 | ||
73 | err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | |
74 | out: | |
75 | return err; | |
76 | } | |
1da177e4 | 77 | |
4d338e1a | 78 | long sys_uname(struct old_utsname __user * name) |
1da177e4 LT |
79 | { |
80 | long err; | |
81 | if (!name) | |
82 | return -EFAULT; | |
83 | down_read(&uts_sem); | |
e9ff3990 | 84 | err = copy_to_user(name, utsname(), sizeof (*name)); |
1da177e4 LT |
85 | up_read(&uts_sem); |
86 | return err?-EFAULT:0; | |
87 | } | |
88 | ||
4d338e1a | 89 | long sys_olduname(struct oldold_utsname __user * name) |
1da177e4 LT |
90 | { |
91 | long error; | |
92 | ||
93 | if (!name) | |
94 | return -EFAULT; | |
95 | if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) | |
96 | return -EFAULT; | |
1d3468a6 | 97 | |
ba180fd4 | 98 | down_read(&uts_sem); |
1d3468a6 | 99 | |
e9ff3990 | 100 | error = __copy_to_user(&name->sysname, &utsname()->sysname, |
1da177e4 | 101 | __OLD_UTS_LEN); |
e9ff3990 SH |
102 | error |= __put_user(0, name->sysname + __OLD_UTS_LEN); |
103 | error |= __copy_to_user(&name->nodename, &utsname()->nodename, | |
1da177e4 | 104 | __OLD_UTS_LEN); |
e9ff3990 SH |
105 | error |= __put_user(0, name->nodename + __OLD_UTS_LEN); |
106 | error |= __copy_to_user(&name->release, &utsname()->release, | |
1da177e4 | 107 | __OLD_UTS_LEN); |
e9ff3990 SH |
108 | error |= __put_user(0, name->release + __OLD_UTS_LEN); |
109 | error |= __copy_to_user(&name->version, &utsname()->version, | |
1da177e4 | 110 | __OLD_UTS_LEN); |
e9ff3990 SH |
111 | error |= __put_user(0, name->version + __OLD_UTS_LEN); |
112 | error |= __copy_to_user(&name->machine, &utsname()->machine, | |
1da177e4 | 113 | __OLD_UTS_LEN); |
e9ff3990 | 114 | error |= __put_user(0, name->machine + __OLD_UTS_LEN); |
1d3468a6 | 115 | |
1da177e4 | 116 | up_read(&uts_sem); |
1d3468a6 | 117 | |
1da177e4 LT |
118 | error = error ? -EFAULT : 0; |
119 | ||
120 | return error; | |
121 | } | |
122 | ||
3db03b4a AB |
123 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) |
124 | { | |
125 | mm_segment_t fs; | |
126 | int ret; | |
127 | ||
128 | fs = get_fs(); | |
129 | set_fs(KERNEL_DS); | |
e4c2ff1c MS |
130 | ret = um_execve((char *)filename, (char __user *__user *)argv, |
131 | (char __user *__user *) envp); | |
3db03b4a AB |
132 | set_fs(fs); |
133 | ||
134 | return ret; | |
135 | } |