Messages in this thread | | | Date | Mon, 17 Aug 2009 08:52:42 -0700 | From | John Reiser <> | Subject | Re: recordmcount commutes with "ld -r" |
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On 08/17/2009 07:33 AM, Steven Rostedt wrote:
> On Mon, 10 Aug 2009, John Reiser wrote:
>> recordmcount commutes with "ld -r". ...
> Running the linking on the built-in.o and *.ko files is a good idea.
I'll see what it takes to patch scripts/Makefile.build and any other build-control file that is required.
>> I noticed another property. Logically, recordmcount could modify a >> .o file in place. ... >> I have written recordmcount.c which does such modify-in-place ...
> I would be interested in seeing it. Do you require any of the elf > libraries to use this? If so, that would make the kernel build > dependent on having the development elf libraries installed.
No, my recordmcount.c is completely standalone except for libc.so. I'll sent it to you (and anyone else who asks) separately.
> I've thought about converting recordmcount into a C file before, but I was > a bit hesitant on rewriting elf routines (although I've done it before > and they are quite trivial) but even more concerned on breaking other > archs.
Yes, the major question is whether R_ARM_ABS32, R_IA64_IMM64, R_PPC64_ADDR64, R_SH_DIR32, R_SPARC_64, R_390_64, and R_390_32 are the correct relocation enums for a plain address. That will require testers...
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