Re: add-symbol-file-from-memory patch breaks non-elf targets?

[Andrew Cagney <cagney@gnu.org>]

> Roland McGrath <roland@redhat.com> writes:
> 
>>> It's unfortunate that this is done in a way that requires a tweak for every
>>> specific target.  The functionality will work, and thus ought to be
>>> available, on any ELF target.  The use of symbol_file_add_from_memory from
>>> other gdb code to support Linux's vDSO is already needed on more than one
>>> Linux target and it is not unlikely that other Linux targets will follow
>>> suit in the future.  It is crufty and makes maintenance error prone if we
>>> have nothing better than copying and updating makefile boilerplate for
>>> every specific Linux/CPU target.  For example, your patch covers only x86
>>> and powerpc, but already IA64 and x86-64 need this support (and AFAIK not
>>> yet powerpc).  
> 
> 
> But "any ELF target" is not a well-defined thing in GDB.  GDB just
> tries to cope with whatever it gets.  GDB lets BFD keep track of what
> object file formats are appropriate for what targets.
> 
> The reason I thought this approach would be appropriate is that it
> resembles the way we handle the different dynamic linker debugging
> protocols: each .mt file selects solib-mumble.o manually.  As far as I
> know, this hasn't been much of a maintenance hassle.

No, that's also a bug.  As part of multi-arch, GDB should be able to 
include multiple shlib mechanisms.

Anyway, looks like I'm fixing this.

Andrew