On Tue, 27 Feb 2018 18:04:26 +0800 Alan Kao <[email protected]> wrote: > 1. During the final linking stages, do "objdump vmlinux.o | grep ..." [2]
Note, doing it at that stage takes the longest time. It makes small changes much longer to compile. That said... > 2. Form the output as an ELF objecj > 3. Link the object to __mcount_loc_start symbol > 4. Done > > With the similar reason as the patch [3], we should mark _mcount to be > a weak symbol to prevent it from being relaxed later. > > We would like to know your opinion and comments on this. > Thanks! What about just having your arch use recordmcount.c instead? It doesn't do any grepping. It is an elf reader and modifier and modifies the .o file directly. Note, I will be rewriting that code in the near future too, to consolidate it with objtool. -- Steve
