hi,
sending change we discussed some time ago [1] to get rid of
some deprecated functions we use in perf prologue code.
Despite the gloomy discussion I think the final code does
not look that bad ;-)
This patchset removes following libbpf functions from perf:
bpf_program__set_prep
bpf_program__nth_fd
struct bpf_prog_prep_result
v3 changes:
- removed R0/R1 zero init in libbpf_prog_prepare_load_fn,
because it's not needed [Andrii]
- rebased/post on top of bpf-next/master which now has
all the needed perf/core changes
v2 changes:
- use fallback section prog handler, so we don't need to
use section prefix [Andrii]
- realloc prog->insns array in bpf_program__set_insns [Andrii]
- squash patch 1 from previous version with
bpf_program__set_insns change [Daniel]
- patch 3 already merged [Arnaldo]
- added more comments
meanwhile.. perf/core and bpf-next diverged, so:
- libbpf bpf_program__set_insns change is based on bpf-next/master
- perf changes do not apply on bpf-next/master so they are based on
perf/core ... however they can be merged only after we release
libbpf 0.8.0 with bpf_program__set_insns change, so we don't break
the dynamic linking
I'm sending perf changes now just for review, I'll resend them
once libbpf 0.8.0 is released
thanks,
jirka
[1] https://lore.kernel.org/bpf/CAEf4BzaiBO3_617kkXZdYJ8hS8YF--ZLgapNbgeeEJ-pY0H88g@xxxxxxxxxxxxxx/
---
Jiri Olsa (2):
perf tools: Register fallback libbpf section handler
perf tools: Rework prologue generation code
tools/perf/util/bpf-loader.c | 173 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------
1 file changed, 155 insertions(+), 18 deletions(-)
