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diff --git a/qt/md/i386.h b/qt/md/i386.h
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--- a/qt/md/i386.h
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-/*
- * QuickThreads -- Threads-building toolkit.
- * Copyright (c) 1993 by David Keppel
- *
- * Permission to use, copy, modify and distribute this software and
- * its documentation for any purpose and without fee is hereby
- * granted, provided that the above copyright notice and this notice
- * appear in all copies. This software is provided as a
- * proof-of-concept and for demonstration purposes; there is no
- * representation about the suitability of this software for any
- * purpose.
- */
-
-#ifndef QT_386_H
-#define QT_386_H
-
-typedef unsigned long qt_word_t;
-
-/* Thread's initial stack layout on the i386:
-
- non-varargs:
-
- +---
- | arg[2] === `userf' on startup
- | arg[1] === `pt' on startup
- | arg[0] === `pu' on startup
- +---
- | ret pc === qt_error
- +---
- | ret pc === `only' on startup
- +---
- | %ebp
- | %esi
- | %edi
- | %ebx <--- qt_t.sp
- +---
-
- When a non-varargs thread is started, it ``returns'' directly to
- the client's `only' function.
-
- varargs:
-
- +---
- | arg[n-1]
- | ..
- | arg[0]
- +---
- | ret pc === `qt_vstart'
- +---
- | %ebp === `startup'
- | %esi === `cleanup'
- | %edi === `pt'
- | %ebx === `vuserf' <--- qt_t.sp
- +---
-
- When a varargs thread is started, it ``returns'' to the `qt_vstart'
- startup code. The startup code calls the appropriate functions. */
-
-
-/* What to do to start a varargs thread running. */
-extern void qt_vstart (void);
-
-
-/* Hold 4 saved regs plus two return pcs (qt_error, qt_start) plus
- three args. */
-#define QT_STKBASE (9 * 4)
-
-/* Hold 4 saved regs plus one return pc (qt_vstart). */
-#define QT_VSTKBASE (5 * 4)
-
-
-/* Stack must be 4-byte aligned. */
-#define QT_STKALIGN (4)
-
-
-/* Where to place various arguments. */
-#define QT_ONLY_INDEX (QT_PC)
-#define QT_USER_INDEX (QT_ARG2)
-#define QT_ARGT_INDEX (QT_ARG1)
-#define QT_ARGU_INDEX (QT_ARG0)
-
-#define QT_VSTARTUP_INDEX (QT_EBP)
-#define QT_VUSERF_INDEX (QT_EBX)
-#define QT_VCLEANUP_INDEX (QT_ESI)
-#define QT_VARGT_INDEX (QT_EDI)
-
-
-#define QT_EBX 0
-#define QT_EDI 1
-#define QT_ESI 2
-#define QT_EBP 3
-#define QT_PC 4
-/* The following are defined only for non-varargs. */
-#define QT_RPC 5
-#define QT_ARG0 6
-#define QT_ARG1 7
-#define QT_ARG2 8
-
-
-/* Stack grows down. The top of the stack is the first thing to
- pop off (preincrement, postdecrement). */
-#define QT_GROW_DOWN
-
-extern void qt_error (void);
-
-/* Push on the error return address. */
-#define QT_ARGS_MD(sto) \
- (QT_SPUT (sto, QT_RPC, qt_error))
-
-
-/* When varargs are pushed, allocate space for all the args. */
-#define QT_VARGS_MD0(sto, nbytes) \
- ((qt_t *)(((char *)(sto)) - QT_STKROUNDUP(nbytes)))
-
-#define QT_VARGS_MD1(sto) \
- (QT_SPUT (sto, QT_PC, qt_vstart))
-
-#define QT_VARGS_DEFAULT
-
-#endif /* QT_386_H */