Only diddle IOPL if opened for writing.
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695a2609af
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@ -38,7 +38,7 @@
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*
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* from: Utah Hdr: mem.c 1.13 89/10/08
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* from: @(#)mem.c 7.2 (Berkeley) 5/9/91
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* $Id: mem.c,v 1.13 1994/03/27 08:55:31 cgd Exp $
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* $Id: mem.c,v 1.14 1994/04/25 05:15:07 mycroft Exp $
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*/
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/*
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@ -58,18 +58,21 @@
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#include <vm/vm.h>
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extern char *vmmap; /* poor name! */
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/*ARGSUSED*/
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mmclose(dev, uio, flags)
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mmclose(dev, uio, mode)
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dev_t dev;
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struct uio *uio;
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int flags;
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int mode;
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{
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struct trapframe *fp;
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switch (minor(dev)) {
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case 14:
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fp = (struct trapframe *)curproc->p_regs;
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fp->tf_eflags &= ~PSL_IOPL;
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if (mode & FWRITE) {
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struct trapframe *fp;
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fp = (struct trapframe *)curproc->p_regs;
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fp->tf_eflags &= ~PSL_IOPL;
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}
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break;
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default:
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break;
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@ -78,17 +81,19 @@ mmclose(dev, uio, flags)
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}
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/*ARGSUSED*/
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mmopen(dev, uio, flags)
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mmopen(dev, uio, mode)
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dev_t dev;
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struct uio *uio;
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int flags;
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int mode;
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{
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struct trapframe *fp;
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switch (minor(dev)) {
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case 14:
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fp = (struct trapframe *)curproc->p_regs;
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fp->tf_eflags |= PSL_IOPL;
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if (mode & FWRITE) {
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struct trapframe *fp;
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fp = (struct trapframe *)curproc->p_regs;
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fp->tf_eflags |= PSL_IOPL;
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}
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break;
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default:
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break;
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