cc binutils > -----Original Message----- > From: Nick Clifton [mailto:ni...@redhat.com] > Sent: Friday, June 15, 2018 6:18 AM > To: Robinson, Paul; dwarf-discuss@lists.dwarfstd.org > Subject: Re: [Dwarf-Discuss] Asm syntax for DWARF 5 line table info > > Hi Paul, > > > I have been working on adding DWARF 5 support to LLVM, and some of > > that support requires some assembler syntax tweaks. It has been > > suggested that I publicize those tweaks outside of the LLVM world, > > and this list seems like the most likely place to find the people > > who would be most interested in agreeing on a common syntax. > > I think that it would also be wise to include the binutils project > (binut...@sourceware.org) as they are responsible for the GNU > Assembler (gas). > > > I propose to add a new optional clause to the .file directive, like so: > > > > .file filenumber [ "directory" ] "path" [ md5 checksum ] > > > > where md5 is a keyword and checksum is the integer checksum, > > typically expressed as a hex 128-bit value. > > > > If all .file directives provide an md5 checksum, then the assembler > > will put that checksum into the DWARF 5 file table. > > If there are discrepancies in the md5 checksums, what should the assembler > do ?
In LLVM, I have the assembler issue a warning if it sees inconsistent use of the md5 clause. It's not an error, because I do see it happen when the compiler is reading a preprocessed file, and the assembler can't tell the difference between something the compiler produced and a mistake made by human coding. Thanks, --paulr > > Cheers > Nick > > _______________________________________________ Dwarf-Discuss mailing list Dwarf-Discuss@lists.dwarfstd.org http://lists.dwarfstd.org/listinfo.cgi/dwarf-discuss-dwarfstd.org
