Hi David, On Thu, Jul 31, 2014 at 2:22 PM, David Edelsohn <dje....@gmail.com> wrote: > As the comment in the code states DWARF2 unwind info was placed in the > data section to prevent the AIX linker from garbage collecting it. > How are you avoiding that problem?
That comment is very old. I'm not sure what the original problem was. The code generated by collect2 which calls register_frame_info_table has explicit references to the DWARF unwind info. The linker won't garbage collect the unwind info as the linker will see it as used through these references. > Also, the AIX linker uses "$" for the current location, so the kludge > of creating PCREL symbols should not be necessary. I will swap it over to this. > Using __dso_handle as the base address is underwhelming. Does the using the TOC sound like a reasonable solution? Or do you know how to get a reference to the start of the data section from the AIX assembler/linker? The ld manpage lists _data, but this symbol doesn't work for shared libraries. Thanks, Andrew
