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COMPAT_NETBSD32(8)          System Manager's Manual         COMPAT_NETBSD32(8)

     compat_netbsd32 - setup procedure for 32-bit compatibility on 64-bit

     The compat_netbsd32 module allows NetBSD/sparc64 to run NetBSD/sparc
     executables, and NetBSD/amd64 to run NetBSD/i386 executables.

     To use compat_netbsd32, one must either have COMPAT_NETBSD32 and
     EXEC_ELF32 in the kernel, or load the compat_netbsd32 and exec_netbsd32
     kernel modules.

     Static executables typically need no additional setup.  Dynamic binaries
     require the dynamic linker plus shared libraries.  Most of these files
     will need to be placed under /emul/netbsd32.

     The easiest method of installing support for these is via the
     emulators/netbsd32_compat14, emulators/netbsd32_compat15, and
     emulators/netbsd32_compat16 packages, provided in the NetBSD packages
     collection.  These install 32-bit a.out and ELF compatibility libraries,
     respectively.  The details of what is actually necessary for correct
     operation are given below.  This obviously is handled by the emulator

     For a.out compatibility, /usr/libexec/ld.so from a 32-bit distribution is
     required to exist as /emul/netbsd32/usr/libexec/ld.so.  For 32-bit ELF
     compatibility, /usr/libexec/ld.elf_so needs to be in

     The shared libraries for a.out binaries do not live under the
     /emul/netbsd32 directory, but under the /emul/aout directory, where the
     a.out dynamic linker will find them.

     A list of things which fail to work in compatibility mode should be here.

     IPC is not well supported.

     sysctl(3) is not well supported.

NetBSD 8.0                      March 11, 2006                      NetBSD 8.0