Calling getaddrinfo(3) in 32-bit binary on 64-bit host

[Eugene Grosbein]

23.01.2018 2:29, Konstantin Belousov пишет:
> On Tue, Jan 23, 2018 at 02:55:24AM +0800, Li-Wen Hsu wrote:
>> I'll try to find other uses of SA_SIZE() and see if they would be run in
>> compat32 mode and works or not.
> There are enough uses of SA_SIZE() by functions which are perhaps called
> both from a sysctl handler and for queuing the routing messages into routing
> socket queue.  In the later case, we cannot know ABI of the reader.  This
> is what I referenced when I noted that routing socket's ABI compat is
> impossible to implement correctly.

Can't we supply sysctl handler with some kind of back reference to original
userland caller of the syscall to find its ABI?