On 07.03.2023 12:33, Juergen Gross wrote: > On 07.03.23 11:31, Jan Beulich wrote: >> On 07.03.2023 07:32, Juergen Gross wrote: >>> Using a rather oldish gcc (7.5) it was verified that code generation >>> doesn't really differ between CONFIG_DEBUG_INFO on or off without >>> CONFIG_DEBUG being set (only observed differences were slightly >>> different symbol addresses, verified via "objdump -d"). The old gcc >>> version selection was based on the assumption, that newer gcc won't >>> regress in this regard. >> >> This is good to know, but I'm still curious about the mentioned >> differences in symbol addresses: If code generation didn't change, what >> caused addresses to differ? Is that merely because individual functions >> or objects are emitted in different order by the compiler? (If so I'd >> be inclined to infer that comparing generated code must have been >> quite a bit of effort, as first of all you would have had to undo that >> re-ordering.) > > I did a simple diff of the two disassembly outputs and got only small > differences for %rip relative addresses (the differences were in the > range of +/- 32 bytes).
That's still odd and hence imo wants understanding. Do you still have both binaries around? Jan
