SIGBUS si_code 12

[Paul Floyd]

> On 22 May 2020, at 21:28, Konstantin Belousov <kostikbel at gmail.com> wrote:
> 
> On Fri, May 22, 2020 at 05:32:37PM +0200, Paul Floyd wrote:
>> A bit more on this.
>> 
>> The code in question is in trap.c:

[snip]

>> 
>> I have machte.prot_fault_translation set to 0 (the default I believe) so this enters the first ‘else if’ branch.
>> 
>> The value of p_osrel looks like it comes from retold.c. I see two mechanisms - passed via auxv AT_OSRELDATE (with a backup of using a sysctl) and reading the NT_FREEBSD_ABI_TAG note - I’m not sure which is used in this case.
> I do not know what retold.c is.


That’s how autocorrect thinks that rtld.c should be spelt.


>> 
>> The auxv value seems to be sent and I can’t see why either should be failing.
> 
> auxv has nothing to do with p_osrel as seen by kernel.  In-kernel
> ELF image activator parses notes and reads osrel if available.

And which files/functions do that?

A+
Paul