Re: netbsd32 emul in netbsd7

[Paul Goyette <paul%vps1.whooppee.com@localhost>]

On Tue, 15 Dec 2015, Patrick Welche wrote:

> Grabbing a /rescue/ls from NetBSD-5/i386, and running it on -current/amd64
> works, but on a recent 7.0_STABLE/amd64 kernel gives
>
> ./ls: Exec format error. Binary file not executable.
>
> ./ls: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, for NetBSD 5.1, stripped
>
>    12      1 ktrace   EMUL  "netbsd"
>    12      1 ktrace   CALL  execve(0x7f7ffffffdbf,0x7f7fffffdbb0,0x7f7fffffdbc0)
>    12      1 ktrace   NAMI  "./ls"
>    12      1 ktrace   NAMI  "./ls"
>    12      1 ktrace   RET   execve -1 errno 8 Exec format error
>    12      1 ktrace   CALL  execve(0x7f7ff7510146,0x7f7fffffd680,0x7f7fffffdbc0)
>    12      1 ktrace   NAMI  "/bin/sh"
>    12      1 ktrace   NAMI  "/libexec/ld.elf_so"
>    12      1 sh       EMUL  "netbsd"
>    12      1 sh       RET   execve JUSTRETURN
>    12      1 sh       CALL  mmap(0,0x8000,3,0x1002,0xffffffff,0,0)
>    12      1 sh       RET   mmap 140187598290944/0x7f7ff7ff8000
>
> no mention of NAMI "/emul/netbsd32"...
>
> modstat suggests netbsd32 emulation is available:
>
> compat_netbsd32  exec       builtin    -1    0                -        compat,compat_sysv,nfsserver,mqueue,exec_elf32
>
>
> Any thoughts on where to look?

The "-1" in the refcount field indicates that the compat_netbsd32 module
failed to initialize.

you could turn on verbose module messages with

	sysctl -w kern.module.verbose=1

and then re-run the module initialization with

	modload -f compat_netbsd32

Grab _all_ the kernel messages from the console...  :)  And you might
also provide complete output from modstat(8) so we can trace any
issues with dependencies ("required" modules).




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