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Diffstat (limited to 'lib/libc/i386/sys/i386_vm86.2')
| -rw-r--r-- | lib/libc/i386/sys/i386_vm86.2 | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/lib/libc/i386/sys/i386_vm86.2 b/lib/libc/i386/sys/i386_vm86.2 deleted file mode 100644 index 5958f31d2cbf..000000000000 --- a/lib/libc/i386/sys/i386_vm86.2 +++ /dev/null @@ -1,141 +0,0 @@ -.\" Copyright (c) 1998 Jonathan Lemon -.\" All rights reserved. -.\" -.\" Redistribution and use in source and binary forms, with or without -.\" modification, are permitted provided that the following conditions -.\" are met: -.\" 1. Redistributions of source code must retain the above copyright -.\" notice, this list of conditions and the following disclaimer. -.\" 2. Redistributions in binary form must reproduce the above copyright -.\" notice, this list of conditions and the following disclaimer in the -.\" documentation and/or other materials provided with the distribution. -.\" -.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND -.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE -.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -.\" SUCH DAMAGE. -.\" -.\" $FreeBSD$ -.\" -.Dd July 27, 1998 -.Dt I386_VM86 2 -.Os -.Sh NAME -.Nm i386_vm86 -.Nd control vm86-related functions -.Sh LIBRARY -.Lb libc -.Sh SYNOPSIS -.In sys/types.h -.In machine/sysarch.h -.In machine/vm86.h -.Ft int -.Fn i386_vm86 "int function" "void *data" -.Sh DESCRIPTION -The -.Fn i386_vm86 -system call -is used to call various vm86 related functions. -The -.Fa function -argument -can be one of the following values: -.Bl -tag -offset indent -width VM86_SET_VME -.It Dv VM86_INIT -This will initialize the kernel's vm86 parameter area for the -process, and permit the process to make vm86 calls. -The -.Fa data -argument -points to the following structure: -.Bd -literal -struct vm86_init_args { - int debug; - int cpu_type; - u_char int_map[32]; -}; -.Ed -.Pp -The -.Fa debug -argument -is used to turn on debugging code. -The -.Fa cpu_type -argument -controls the type of CPU being emulated, and is currently unimplemented. -The -.Fa int_map -argument -is a bitmap which determines whether vm86 interrupts should be handled -in vm86 mode, or reflected back to the process. -If the -.Em Nth -bit is set, the interrupt will be reflected to the process, otherwise -it will be dispatched by the vm86 interrupt table. -.It Dv VM86_INTCALL -This allows calls to be made to vm86 interrupt handlers by the process. -It effectively simulates an INT instruction. -.Fa data -should point to the following structure: -.Bd -literal -struct vm86_intcall_args { - int intnum; - struct vm86frame vmf; -}; -.Ed -.Pp -.Fa intnum -specifies the operand of INT for the simulated call. -A value of 0x10, for example, would often be used to call into the VGA BIOS. -.Fa vmf -is used to initialize CPU registers according to the calling convention for -the interrupt handler. -.It Dv VM86_GET_VME -This is used to retrieve the current state of the Pentium(r) processor's -VME (Virtual-8086 Mode Extensions) flag, which is bit 0 of CR4. -.Fa data -should be initialized to point to the following: -.Bd -literal -struct vm86_vme_args { - int state; /* status */ -}; -.Ed -.Pp -.Fa state -will contain the state of the VME flag on return. -.\" .It Dv VM86_SET_VME -.El -.Pp -vm86 mode is entered by calling -.Xr sigreturn 2 -with the correct machine context for vm86, and with the -.Dv PSL_VM -bit set. -Control returns to the process upon delivery of a signal. -.Sh RETURN VALUES -.Rv -std i386_vm86 -.Sh ERRORS -The -.Fn i386_vm86 -system call -will fail if: -.Bl -tag -width Er -.It Bq Er EINVAL -The kernel does not have vm86 support, or an invalid function was specified. -.It Bq Er ENOMEM -There is not enough memory to initialize the kernel data structures. -.El -.Sh AUTHORS -.An -nosplit -This man page was written by -.An Jonathan Lemon , -and updated by -.An Bruce M Simpson . |