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Re: CVS commit: src/sys



I will investigate.

Can you confirm that it works correctly if you have the built-in
module?  (ie, kernel with ``options COMPAT_NETBSD32'')


On Thu, 5 Nov 2020, Rin Okuyama wrote:

On 2020/11/05 5:43, Paul Goyette wrote:
BTW, the patch you submitted with the initial message in this thread
looks good for avoiding the issue.  But I'm not sure it is a complete
solution.

In particular, you would need to build a 32-bit arm that contains ``no
options COMPAT_NETBSD32'' and then boot and load the compat_netbsd32
and compat_netbsd32_coredump modules

     modload compat_netbsd32
     modload compat_netbsd32_coredump

Then see if emulation of the old ABI still works, and check if core-
dump works for old-ADI programs; the test program I've been using for
core-dump checking is

     #include <stdlib.h>
     int main(int argc, void *argv) { abort(); }

I really have to leave and take care of some personal business, so I
would greatly appreciate if you can check this out.

Hmm, ``modload compat_netbsd32'' does not work on evbarmv6hf-el:

----
# uname -ap
NetBSD 9.99.75 NetBSD 9.99.75 (RPI0) #11: Thu Nov 5 20:26:39 JST 2020 rin@latipes:/sys/arch/evbarm/compile/RPI0 evbarm earmv6hf
# modload compat_netbsd32
[ 29.6328410] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `netbsd32_vm_default_addr' not found [ 29.6460400] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `netbsd32_machdep_md_init' not found [ 29.6560750] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `netbsd32_sendsig' not found [ 29.6661200] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `cpu_mcontext32_validate' not found [ 29.6791570] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `cpu_setmcontext32' not found [ 29.6791570] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `netbsd32_machdep_md_fini' not found [ 29.6948370] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `startlwp32' not found [ 29.7048770] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `cpu_getmcontext32' not found [ 29.7168550] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `machine32' not found [ 29.7168550] kobj_checksyms, 994: [compat_netbsd32]: linker error: symbol `netbsd32_sysarch' not found [ 29.7318320] WARNING: module error: unable to affix module `compat_netbsd32', error 8
modload: compat_netbsd32: Exec format error
----

This should be because there are ``#ifdef COMPAT_NETBSD32'' codes in files
not included in compat_netbsd32 module. compat_netbsd32 module must not
work also for aarch64 and mips64 for the same reason, whereas amd64 and
sparc64 seem OK.

Thanks,
rin

!DSPAM:5fa3f309175521945872603!



+--------------------+--------------------------+-----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:     |
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