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Re: [PATCH v2] backends,bpf: add proper relocation support
On 6/21/18 11:58 AM, Mark Wielaard wrote:
On Wed, Jun 20, 2018 at 07:18:22AM -0700, Yonghong Song wrote:
On 6/20/18 4:41 AM, Mark Wielaard wrote:
The patch looks perfect. And the new testcase is good. I used the
testfile to quickly test eu-readelf --debug-dump also got the
relocations right, and it did of course.
Just waiting for the glibc elf.h update/sync and then I'll push this to
master.
This looks perfect. Thanks!
Pushed both. Thanks for the patch and testcase.
Thanks for the below tip!
Don't know you release schedule, but could you cut a release
soon so this can be picked up by dist/pahole?
Yonghong
BTW. The following now also just works in case you have tools that
cannot handle the BPF relocations, but can handle separate .debug
files:
eu-strip --reloc-debug-sections -f testfile-bpf-reloc.o.debug \
testfile-bpf-reloc.o
That puts the debuginfo with all (simple) relocations resolved
into the .debug file.
--reloc-debug-sections Resolve all trivial relocations between debug
sections if the removed sections are placed in
a debug file (only relevant for ET_REL files,
operation is not reversable, needs -f)
This is used by some distros for the kernel .ko modules (which are
also ET_REL files) to safe space. But also might be applicable to
these BPF elf files in case they are packaged.
Cheers,
Mark