1.\" $NetBSD: compat_netbsd32.8,v 1.6 2004/12/31 00:57:50 wiz Exp $ 2.\" 3.\" Copyright (c) 2001 Matthew R. Green 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. The name of the author may not be used to endorse or promote products 15.\" derived from this software without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.Dd December 28, 2004 30.Dt COMPAT_NETBSD32 8 31.Os 32.Sh NAME 33.Nm compat_netbsd32 34.Nd setup procedure for 32-bit compatibility on 64-bit platform 35.Sh DESCRIPTION 36The 37.Nm 38module allows 39.Nx Ns Tn /sparc64 40to run 41.Nx Ns Tn /sparc 42executables, and 43.Nx Ns Tn /amd64 44to run 45.Nx Ns Tn /i386 46executables. 47.Pp 48To use 49.Nm , 50one must either have 51.Dv COMPAT_NETBSD32 52in the kernel, or load the compat_netbsd32 and exec_netbsd32 kernel 53modules. 54.Pp 55Static executables typically need no additional setup. 56Dynamic binaries require the dynamic linker plus shared libraries. 57Most of these files will need to be placed under 58.Pa /emul/netbsd32 . 59.Pp 60The easiest method of installing support for these is via the 61.Pa emulators/netbsd32_compat14 , 62.Pa emulators/netbsd32_compat15 , 63and 64.Pa emulators/netbsd32_compat16 65packages, provided in the 66.Nx 67packages collection. 68These install 32-bit a.out and ELF compatibility libraries, 69respectively. 70The details of what is actually necessary for correct operation 71are given below. 72This obviously is handled by the emulator packages. 73.Pp 74For a.out compatibility, 75.Pa /usr/libexec/ld.so 76from a 32-bit distribution is required to exist as 77.Pa /emul/netbsd32/usr/libexec/ld.so . 78For 32-bit ELF compatibility, 79.Pa /usr/libexec/ld.elf_so 80needs to be in 81.Pa /emul/netbsd32/usr/libexec/ld.elf_so . 82.Pp 83The shared libraries for a.out binaries do not live under the 84.Pa /emul/netbsd32 85directory, but under the 86.Pa /emul/aout 87directory, where the a.out dynamic linker will find them. 88.Sh BUGS 89A list of things which fail to work in compatibility mode should 90be here. 91.Pp 92IPC is not well supported. 93.Pp 94.Xr sysctl 3 95is not well supported. 96