Date: Mon, 4 Jan 2021 18:11:51 -0800 From: Khem Raj <raj.khem@...il.com> To: musl@...ts.openwall.com Subject: Re: [PATCH] crt: Add .file directive Thanks for update thats right way to go as well. I think we can ignore this patch On Mon, Jan 4, 2021 at 12:08 PM Fangrui Song <i@...kray.me> wrote: > > On Fri, Oct 30, 2020 at 1:54 PM Fangrui Song <i@...kray.me> wrote: > > > > On 2020-10-30, Rich Felker wrote: > > >On Fri, Oct 30, 2020 at 11:44:02AM -0700, Khem Raj wrote: > > >> Musl linked binaries come out to be not reproducible because > > >> absolute build path is seen in debug info of crti.o and crtn.o > > >> This is due to the fact that these objects are built from assembly > > >> source files and they are missing .file directive > > >> if we add .file <filename>.s in them then debug info encodes this > > >> value instead of absolute path in debug_line section > > > > .debug_line is unrelated because there is no .loc directive in these > > crti.s and crtn.s files. > > > > Many architectures do not leave non-STT_SECTION STB_LOCAL symbols in > > crti.o and crtn.o, so they don't need to be patched (even if the > > maintainer agrees to add the workaround in musl, instead of fixing the > > toolchain). > > > > >Surely there should be some better way to achieve this with CFLAGS > > >instead of duplication across every source file..? > > > > > >Rich > > > > https://bugs.llvm.org/show_bug.cgi?id=48023 captures the nature of the > > problem. You may send a message to binutils@...rceware.org how GCC/gas > > should handle this situation. > > > > LLD and gold do not synthesize STT_FILE, hence no such problem. > > The binutils action is: GNU ld 2.36 will use the base name > (https://sourceware.org/bugzilla/show_bug.cgi?id=26822)
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