1.\" $NetBSD: compat_netbsd32.8,v 1.5 2003/03/31 09:32:43 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 February 3, 2001 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. 43.Pp 44To use 45.Nm , 46one must either have 47.Dv COMPAT_NETBSD32 48in the kernel, or load the compat_netbsd32 and exec_netbsd32 kernel 49modules. 50.Pp 51Static executables typically need no additional setup. 52Dynamic binaries require the dynamic linker, plus shared libraries. Most of 53these files will need to be placed under 54.Pa /emul/netbsd32 . 55.Pp 56The easiest method of installing support for these is via the 57.Pa emulators/netbsd32_compat14 58and 59.Pa emulators/netbsd32_compat15 60packages, provided in the 61.Nx 62packages collection. These install 32-bit a.out and ELF compatibility 63libraries, respectively. The details of what is actually necessary for 64correct operation are given below. This obviously is handled by the 65emulator packages. 66.Pp 67For a.out compatibility, 68.Pa /usr/libexec/ld.so 69from a 32-bit distribution is required to exist as 70.Pa /emul/netbsd32/usr/libexec/ld.so . 71For 32-bit ELF compatibility, 72.Pa /usr/libexec/ld.elf_so 73needs to be in 74.Pa /emul/netbsd32/usr/libexec/ld.elf_so . 75.Pp 76The shared libraries for a.out binaries do not live under the 77.Pa /emul/netbsd32 78directory, but under the 79.Pa /emul/aout 80directory, where the a.out dynamic linker will find them. 81.Sh BUGS 82A list of things which fail to work in compatibility mode should 83be here. 84.Pp 85IPC is not well supported. 86.Pp 87.Xr sysctl 3 88is not well supported. 89