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Re: PATCH: PR 18655


Daniel Jacobowitz wrote:

Assuming it bakes OK on the mainline, I would like this patch for 4.0. Eventually GDB will use DWARF-2 unwind information on PPC; the longer
GCC generates bad unwind information, the harder it will be to adapt
GDB. So I have high motivation to see 4.0.1 fixed.

There were no complaints, and no objections to the idea of putting in 4.0, so I went ahead and committed. If there's any trouble, for some unforseen reason, it's coming back out, though.


It's probably going to require a gruesome unwinding hack anyway.

Can you treat a return address of 0x41 in the CFA as meaning 0x6c on PowerPC? Or notice the mismatch somehow? (I'm curious, in other words, as to whether you drop the non-DWARF2 unwinding by default, and compensate for the sometimes-broken DWARF2.)


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Mark Mitchell
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