On 09/27/10 16:48, Paul Brook wrote:
Most of the interesting bits happen in the linker+debugger. "gcc -ffunction- sections -fdata-sections -fPIC" is likely to be pretty good in terms of compiler output. What you then need is a linker that will relink an image, changing it as little as possible relative to a previous run. Your debugger then needs to be able to replace these images in-place (which may require interaction with the dynamic linker). Be warned that this ends up being extremely complex, even for relatively simple changes.
I think that you are aiming at the wrong target. Look at the goal: - To be able to debug then edit, recompile and continue debugging. There seems to be no requirement for "preserve the ABI" nor "compile to native code". What I am getting at is that it is possible to use a different ABI that is more robust with respect to local variable addition/removal. Michael
