[Bug gas/28262] Add warning when generating code in data section

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28262

Nick Clifton <nickc at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |nickc at redhat dot com

--- Comment #1 from Nick Clifton <nickc at redhat dot com> ---
(In reply to Dietmar May from comment #0)
Hi Dietmar,

> If assembler code exists within a section that does not have a flags
> argument, and does not have a "well known" name (like ".init" or ".text"),
> it is assembled and silently placed within a data section.

I guess it depends upon what you mean by a data section.  If you mean a section
with the PROGBITS type and the ALLOC and WRITE flags, then I would agree.  But
to be clear such a section will not have the EXECUTE flag.  (I am restricting
myself to ELF here, but similar concepts exist for other file formats).


> ld will happily link the code, and the code will execute; 

Are you sure about this ?  If the code is in a non-executable section then it
should be linked into a non-executable segment, and so it should never be run.

Do you have an example to demonstrate the behaviour you describe ?


> The warning would only be emitted in the case where a section contains
> executable code,

Well I am not convinced enough of the utility of this warning to want to
implement it myself, but if someone volunteers I am not going to object...

Cheers
  Nick

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