From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Lance Taylor To: hjl@lucon.org Cc: gas2@cygnus.com Subject: Re: A PREFIX_SEPARATOR bug in binutils 2.9 Date: Tue, 21 Apr 1998 12:39:00 -0000 Message-id: <199804211911.PAA05010@subrogation.cygnus.com> References: X-SW-Source: 1998/msg00165.html From: hjl@lucon.org (H.J. Lu) Date: Tue, 21 Apr 1998 12:02:45 -0700 (PDT) PREFIX_SEPARATOR indicates a prefix, like data16PREFIX_SEPARATORmov foo,%eax But '/' is also used to start a comment. So data16/mov foo,%eax becomes data16 after preprocessing. Thanks. If you include a test case with a bug report, it will save everybody's time. > been there since May 1993, so clearly it can work. Apparently, noone tried to use it or reported it. So the next question is whether we think this ought to work. Evidently gcc does not generate code of this form, or this would have been noticed long ago. Note that there is another way to accomplish this: data16 mov foo,%eax I tried the test case data16/mov foo,%eax on the UnixWare assembler, and it failed there as well. In fact, the reason gas uses '/' to start a comment for i386 ELF is because that is how the UnixWare assembler behaves. Putting data16 on a separate line, as above, works with both gas and the UnixWare assembler. I don't know if the UnixWare assembler permits you to specify a prefix on the same line as an instruction. I tried a few other characters, but I couldn't find anything that worked. So I'm not sure whether we need to change anything here. Ian