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Only diddle IOPL if opened for writing.

This commit is contained in:
mycroft 1994-04-25 05:15:07 +00:00
parent 695a2609af
commit dabe150020
1 changed files with 16 additions and 11 deletions
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27
sys/arch/i386/i386/mem.c
View File

@ -38,7 +38,7 @@
*
* from: Utah Hdr: mem.c 1.13 89/10/08
* from: @(#)mem.c 7.2 (Berkeley) 5/9/91
* $Id: mem.c,v 1.13 1994/03/27 08:55:31 cgd Exp $
* $Id: mem.c,v 1.14 1994/04/25 05:15:07 mycroft Exp $
*/
/*
@ -58,18 +58,21 @@
#include <vm/vm.h>
extern char *vmmap; /* poor name! */
/*ARGSUSED*/
mmclose(dev, uio, flags)
mmclose(dev, uio, mode)
dev_t dev;
struct uio *uio;
int flags;
int mode;
{
struct trapframe *fp;
switch (minor(dev)) {
case 14:
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags &= ~PSL_IOPL;
if (mode & FWRITE) {
struct trapframe *fp;
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags &= ~PSL_IOPL;
}
break;
default:
break;
@ -78,17 +81,19 @@ mmclose(dev, uio, flags)
}
/*ARGSUSED*/
mmopen(dev, uio, flags)
mmopen(dev, uio, mode)
dev_t dev;
struct uio *uio;
int flags;
int mode;
{
struct trapframe *fp;
switch (minor(dev)) {
case 14:
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags |= PSL_IOPL;
if (mode & FWRITE) {
struct trapframe *fp;
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags |= PSL_IOPL;
}
break;
default:
break;