Date: Sat, 17 Aug 2002 12:10:04 -0700 (PDT) From: "Jukka A. Ukkonen" <spam-me-senseless@sittingduck.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/41543: Easier wine/w32 support Message-ID: <200208171910.g7HJA4S3060592@freefall.freebsd.org>
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The following reply was made to PR kern/41543; it has been noted by GNATS.
From: "Jukka A. Ukkonen" <spam-me-senseless@sittingduck.com>
To: freebsd-gnats-submit@FreeBSD.org
Cc:
Subject: Re: kern/41543: Easier wine/w32 support
Date: Sat, 17 Aug 2002 22:06:13 +0300
This is a multi-part message in MIME format.
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Attached is a better version of the same theme. My original
version used a compiled in constant name for the emulator.
This of course is not appropriate, because some systems might
prefer to use other windows support software than wine.
The new version makes the name of the used emulator program
a sysctl adjustable kernel MIB variable (kern.w32emu).
The new version also fixes some other minor inconveniences
which were present in the initial version.
This extension requires the HW architecture being defined as
a preprocessor macro (i386, etc) while compiling the kernel.
It tries to check whether the binary could be run on this HW
platform.
--
Cheers,
// jau
.--- ..- -.- -.- .- .- .-.-.- ..- -.- -.- --- -. . -.
/ Jukka A. Ukkonen, Mawit Ltd, Finland
/__ M.Sc. (sw-eng & cs)
/ Internet: jau(a)iki.fi
/ (Phone) +358-500-606-671
v
+ + + + My opinions are mine and mine alone, not my employers. + + + +
--------------84D14C616853ED7F899BF845
Content-Type: application/x-sh;
name="ImgActWine.sh"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
filename="ImgActWine.sh"
# This is a shell archive. Save it in a file, remove anything before
# this line, and then unpack it by entering "sh file". Note, it may
# create directories; files and directories will be owned by you and
# have default permissions.
#
# This archive contains:
#
# windos.h
# imgact_wine.c
#
echo x - windos.h
sed 's/^X//' >windos.h << 'END-of-windos.h'
X
X#ifndef _COMPAT_WINDOS_H
X#define _COMPAT_WINDOS_H
X
X/*
X * This file was originally taken from the Willows twin package
X * and modified to better suit being used inside a UNIX kernel.
X *
X * This file does nothing more than describes the format of
X * a ms-windows binary file header.
X */
X
X#ifndef WINDOS_WORD
Xtypedef unsigned short WORD;
X# define WINDOS_WORD WORD
X#endif
X
X#ifndef WINDOS_DWORD
Xtypedef unsigned long DWORD;
X# define WINDOS_DWORD DWORD
X#endif
X
X/*
X * Old MZ header for DOS programs.
X * We check only the magic and the e_lfanew offset to
X * the new executable header.
X *
X * The new format executables should start with PE\0\0.
X * The next two bytes after the "PE\0\0" tag specify
X * the hardware architecture for which the binary has
X * been compiled.
X */
X
Xtypedef struct
X{
X WORD e_magic; /* MZ Header signature */
X WORD e_cblp; /* Bytes on last page of file */
X WORD e_cp; /* Pages in file */
X WORD e_crlc; /* Relocations */
X WORD e_cparhdr; /* Size of header in paragraphs */
X WORD e_minalloc; /* Minimum extra paragraphs needed */
X WORD e_maxalloc; /* Maximum extra paragraphs needed */
X WORD e_ss; /* Initial (relative) SS value */
X WORD e_sp; /* Initial SP value */
X WORD e_csum; /* Checksum */
X WORD e_ip; /* Initial IP value */
X WORD e_cs; /* Initial (relative) CS value */
X WORD e_lfarlc; /* File address of relocation table */
X WORD e_ovno; /* Overlay number */
X WORD e_res[4]; /* Reserved words */
X WORD e_oemid; /* OEM identifier (for e_oeminfo) */
X WORD e_oeminfo; /* OEM information; e_oemid specific */
X WORD e_res2[10]; /* Reserved words */
X WORD e_lfanew; /* Offset to extended header */
X} IMAGE_DOS_HEADER,*PIMAGE_DOS_HEADER;
X
X#define IMAGE_DOS_SIGNATURE 0x5A4D /* MZ */
X#define IMAGE_OS2_SIGNATURE 0x454E /* NE */
X#define IMAGE_OS2_SIGNATURE_LE 0x454C /* LE */
X#define IMAGE_VXD_SIGNATURE 0x454C /* LE */
X#define IMAGE_NT_SIGNATURE 0x00004550 /* PE00 */
X
X#endif
END-of-windos.h
echo x - imgact_wine.c
sed 's/^X//' >imgact_wine.c << 'END-of-imgact_wine.c'
X/*
X * Copyright (c) 2002, Jukka A. Ukkonen <jau(a)drop-this-part.iki.fi>
X * All rights reserved.
X *
X * Redistribution and use in source and binary forms, with or without
X * modification, are permitted provided that the following conditions
X * are met:
X * 1. Redistributions of source code must retain the above copyright
X * notice, this list of conditions and the following disclaimer.
X * 2. Redistributions in binary form must reproduce the above copyright
X * notice, this list of conditions and the following disclaimer in the
X * documentation and/or other materials provided with the distribution.
X *
X * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
X * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
X * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
X * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
X * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
X * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
X * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
X * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
X * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
X * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
X * SUCH DAMAGE.
X *
X * $Id: imgact_wine.c,v 1.4 2002/08/17 15:09:19 jau Exp $
X */
X
X/*
X * Set the editor tab-width to 4
X * to view/edit this file.
X * Otherwise this might look a bit funny.
X */
X
X#include <sys/param.h>
X#include <sys/systm.h>
X#include <sys/sysproto.h>
X#include <sys/exec.h>
X#include <sys/imgact.h>
X#include <sys/kernel.h>
X#include <sys/sysctl.h>
X
X#include <vm/vm_param.h>
X#include <compat/windos.h>
X
X#if defined(USER_LDT) && defined(SYSVSHM) \
X && defined(SYSVSEM) && defined(SYSVMSG)
X# define IMGACT_WINE_OK
X#else
X# undef IMGACT_WINE_OK
X#endif
X
X/*
X * We do not really have to test for this limit,
X * because "/usr/local/bin/wine" is static and
X * obviously also much shoter than 64 bytes.
X */
X
X#define MAXWINECMDLEN 64
X
X#if defined(i386)
Xstatic char w32emulator[MAXWINECMDLEN] = "/usr/local/bin/wine";
X#else
Xstatic char w32emulator[MAXWINECMDLEN] = "";
X#endif
X
XSYSCTL_STRING(_kern, KERN_W32EMU, w32emu, CTLFLAG_RW, \
X w32emulator, sizeof (w32emulator), \
X "Windows emulator for w16/w32 binaries");
X
Xstatic int exec_wine_imgact __P((struct image_params *imgp));
X
X/*
X * Shell interpreter image activator. A interpreter name beginning
X * at imgp->stringbase is the minimal successful exit requirement.
X */
X
Xstatic int
Xexec_wine_imgact (imgp)
X struct image_params *imgp;
X{
X#ifndef IMGACT_WINE_OK
X return (-1);
X#else
X const char *image_header = imgp->image_header;
X const char *ihp, *line_endp;
X char *interp;
X IMAGE_DOS_HEADER *mshdr;
X u_int16_t extoffs;
X
X# if !defined(i386) && !defined(alpha) && !defined(ppc)
X return (-1);
X# else
X
X /* a wine/ms-win-dos executable? */
X
X if ((image_header[0] != 'M') || (image_header[1] != 'Z'))
X return (-1);
X
X
X mshdr = (IMAGE_DOS_HEADER *) image_header;
X
X extoffs = mshdr.e_lfanew;
X
X# if BYTE_ORDER == BIG_ENDIAN
X extoffs = (extoffs >> 8) | (extoffs << 8);
X# endif
X
X
X if (extoffs >= PAGE_SIZE - 6)
X return (-1);
X
X /*
X * If it happens to be a PE\0\0 format object,
X * we can test also whether it has been intended
X * for our present HW architecture.
X */
X
X if ((image_header[extoffs] == 0x50) /* 'P' */
X && (image_header[extoffs + 1] == 0x45) /* 'E' */
X && (image_header[extoffs + 2] == 0)
X && (image_header[extoffs + 3] == 0)) {
X
X /*
X * We *must not* return ENOEXEC here.
X * The exec() code will do it unless no other
X * imgact activator takes the job.
X */
X
X# if defined(i386)
X if ((image_header[extoffs + 4] != 0x4c)
X || (image_header[extoffs + 4] != 0x01))
X return (-1);
X# endif
X
X# if defined(alpha)
X if ((image_header[extoffs + 4] != 0x84)
X || (image_header[extoffs + 4] != 0x01))
X return (-1);
X# endif
X
X# if defined(ppc)
X if ((image_header[extoffs + 4] != 0xf0)
X || (image_header[extoffs + 4] != 0x01))
X return (-1);
X# endif
X
X }
X# if !defined(i386)
X else {
X /*
X * If a MZ binary is not a new format PE binary
X * it is invariably assumed to be a i386 binary.
X * Because we are not running on a i386 host,
X * there is pretty little we can do, though.
X */
X return (-1);
X }
X# endif
X
X if (w32emulator[0] != '/') /* Expect absolute path name. */
X return (-1); /* Emulator undefined. */
X
X imgp->interpreted = 1;
X
X interp = imgp->interpreter_name;
X ihp = w32emulator;
X
X while (*interp++ = *ihp++);
X
X imgp->argv0 = imgp->uap->fname;
X
X return (0);
X
X# endif
X#endif
X}
X
X/*
X * Tell kern_execve.c about it, with a little help from the linker.
X * Since `const' objects end up in the text segment, TEXT_SET is the
X * correct directive to use.
X */
X
Xstatic const struct execsw wine_execsw = { exec_wine_imgact, "Wine" };
X
XEXEC_SET(wine, wine_execsw);
END-of-imgact_wine.c
exit
--------------84D14C616853ED7F899BF845--
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