89 lines
3.1 KiB
Groff
89 lines
3.1 KiB
Groff
.\" $NetBSD: compat_netbsd32.8,v 1.5 2003/03/31 09:32:43 wiz Exp $
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.\"
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.\" Copyright (c) 2001 Matthew R. Green
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd February 3, 2001
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.Dt COMPAT_NETBSD32 8
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.Os
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.Sh NAME
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.Nm compat_netbsd32
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.Nd setup procedure for 32-bit compatibility on 64-bit platform
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.Sh DESCRIPTION
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The
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.Nm
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module allows
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.Nx Ns Tn /sparc64
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to run
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.Nx Ns Tn /sparc
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executables.
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.Pp
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To use
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.Nm ,
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one must either have
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.Dv COMPAT_NETBSD32
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in the kernel, or load the compat_netbsd32 and exec_netbsd32 kernel
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modules.
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.Pp
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Static executables typically need no additional setup.
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Dynamic binaries require the dynamic linker, plus shared libraries. Most of
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these files will need to be placed under
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.Pa /emul/netbsd32 .
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.Pp
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The easiest method of installing support for these is via the
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.Pa emulators/netbsd32_compat14
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and
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.Pa emulators/netbsd32_compat15
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packages, provided in the
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.Nx
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packages collection. These install 32-bit a.out and ELF compatibility
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libraries, respectively. The details of what is actually necessary for
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correct operation are given below. This obviously is handled by the
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emulator packages.
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.Pp
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For a.out compatibility,
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.Pa /usr/libexec/ld.so
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from a 32-bit distribution is required to exist as
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.Pa /emul/netbsd32/usr/libexec/ld.so .
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For 32-bit ELF compatibility,
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.Pa /usr/libexec/ld.elf_so
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needs to be in
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.Pa /emul/netbsd32/usr/libexec/ld.elf_so .
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.Pp
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The shared libraries for a.out binaries do not live under the
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.Pa /emul/netbsd32
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directory, but under the
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.Pa /emul/aout
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directory, where the a.out dynamic linker will find them.
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.Sh BUGS
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A list of things which fail to work in compatibility mode should
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be here.
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.Pp
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IPC is not well supported.
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.Pp
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.Xr sysctl 3
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is not well supported.
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