[PATCHv5 bpf-next 0/1] perf tools: Fix prologue generation

Jiri Olsa
2022-06-16T20:22:25Z

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

v5 changes:
- squashed patches together so we don't break bisection [Arnaldo]

v4 changes:
- fix typo [Andrii]

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

thanks,
jirka

[1] https://lore.kernel.org/bpf/CAEf4BzaiBO3_617kkXZdYJ8hS8YF--ZLgapNbgeeEJ-pY0H88g@mail.gmail.com/
---
Jiri Olsa (1):
perf tools: Rework prologue generation code

tools/perf/util/bpf-loader.c | 204 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------
1 file changed, 175 insertions(+), 29 deletions(-)