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1 perry 1 VM86
2 !!!VM86
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 RETURN VALUE
7 ERRORS
8 CONFORMING TO
9 ----
10 !!NAME
11
12
13 vm86, vm86old - enter virtual 8086 mode
14 !!SYNOPSIS
15
16
17 __#include __
18
19
20 __int vm86(unsigned long__ ''fn''__, struct
21 vm86plus_struct *__ ''v86''__);__
22
23
24 __int vm86old(struct vm86_struct *__
25 ''info''__);__
26 !!DESCRIPTION
27
28
29 The system call __vm86__ was introduced in Linux 0.97p2.
30 In Linux 2.1.15 and 2.0.28 it was renamed to __vm86old__,
31 and a new __vm86__ was introduced. The definition of
32 `struct vm86_struct' was changed in 1.1.8 and
33 1.1.9.
34
35
36 These calls cause the process to enter VM86 mode, and are
37 used by __dosemu__ (dos(1)).
38 !!RETURN VALUE
39
40
41 On success, zero is returned. On error, -1 is returned, and
42 ''errno'' is set appropriately.
43 !!ERRORS
44
45
46 (for __vm86old__)
47
48
49 __EPERM__
50
51
52 Saved kernel stack exists. (This is a kernel sanity check;
53 the saved stack should only exist within vm86 mode
54 itself.)
55 !!CONFORMING TO
56
57
58 This call is specific to Linux on Intel processors, and
59 should not be used in programs intended to be
60 portable.
61 ----
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