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From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Fri, 11 Sep 2020 06:51:33 -0700
Message-ID: <CAMe9rOrgKDa4Qppscd6_tK4kCsNSzwj13N4PP-hSCNwbc-jc2Q@mail.gmail.com>
Subject: Re: [PATCH] gas: Don't error when .debug_line already exists, unless
 .loc was used
To: Nick Clifton <nickc@redhat.com>
Cc: Mark Wielaard <mark@klomp.org>,
 "binutils@sourceware.org" <binutils@sourceware.org>
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On Fri, Sep 11, 2020 at 5:48 AM Nick Clifton via Binutils
<binutils@sourceware.org> wrote:
>
> Hi Mark,
>
> > The tests are unfortunately arch specific because the line table is only
> > generated when actual instructions have been emitted.
>
> Are you sure about that ?  How about using the NOP instruction ?
>
> I admit that some architectures do need special syntax for their
> nop instructions, but there is already a test in gas testsuite
> that handles this (see gas/testsuite/gas/all/gas.exp:org-1).  The
> nop-selecting code there could probably be extracted into a library
> function then used in lots of places...
>

7.66 '.nops SIZE[, CONTROL]'
============================

This directive emits SIZE bytes filled with no-op instructions.  SIZE is
absolute expression, which must be a positve value.  CONTROL controls
how no-op instructions should be generated.  If the comma and CONTROL
are omitted, CONTROL is assumed to be zero.


-- 
H.J.