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[Bug backtrace/15032] GNU/Linux backtrace fails to use eh_frameinformation when built with --enable-64-bit-bfd


http://sourceware.org/bugzilla/show_bug.cgi?id=15032

Jan Kratochvil <jan.kratochvil at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING

--- Comment #6 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2013-01-21 18:39:13 UTC ---
(In reply to comment #2)
> as I was in the process of adding missing .eh_frame data

I believe the problem is in your added data.  How do you add it?

gas has the .cfi_* directives which assemble .eh_frame the right way for you.

gcc -fasynchronous-unwind-tables -m32 production uses augmentation flag 'R'
providing encoding 0x1b, therefore DW_EH_PE_pcrel | DW_EH_PE_sdata4.

As the values are 0xff.. they are really signed and you should use
DW_EH_PE_sdata*.

I find it NOT-A-BUG on the GDB side.

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