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[Bug backtrace/15032] GNU/Linux backtrace fails to use eh_frameinformation when built with --enable-64-bit-bfd
- From: "jan.kratochvil at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Mon, 21 Jan 2013 18:39:13 +0000
- Subject: [Bug backtrace/15032] GNU/Linux backtrace fails to use eh_frameinformation when built with --enable-64-bit-bfd
- Auto-submitted: auto-generated
- References: <bug-15032-4717@http.sourceware.org/bugzilla/>
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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