[Bug breakpoints/12703] Different function breakpoints are set atsame pc address.

["qiyao at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12703

Yao Qi <qiyao at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |qiyao at gcc dot gnu.org

--- Comment #3 from Yao Qi <qiyao at gcc dot gnu.org> 2011-05-06 04:17:03 UTC ---

> 
> I looked into the function arm_skip_prologue which uses limit_pc to indicate
> the range of prologue. If it fails to get an acute pc boundary, it will use
> pc+64 as limit_pc. For my case, the pc+64 exceeds the body of function
> fault_isr and reaches the prologue of following function reset_isr. This
> mechanism cause GDB to  set two different function points at the same pc
> address.

This fix works, however, IMO, the root cause is that thumb_analyze_prologue is
unable to compute/analyze such prologue in your case.

> 
> I come up with attached patch to ensure the limit_pc shouldn't exceed the body
> of current functions. It fixes this issue.

Please send your patch to gcc-patches@, then maintainers can review/approve it.

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