selftests/bpf: Resolve bpftool through bpftool_helpers in core_reloc

run_btfgen() shells out to a hardcoded "./bpftool". That path only
exists in the build tree, where DEFINE_TEST_RUNNER_RULES symlinks
bpftool next to each runner binary. After "make install" it is not
there: commit 0b236ac75d04 ("selftests/bpf: Fix make install target")
dropped bpftool from TEST_GEN_PROGS_EXTENDED, which used to flatten it
into $(INSTALL_PATH), and installs it under $(INSTALL_PATH)/tools/sbin/
instead, matching detect_bpftool_path().

Running test_progs from the install tree therefore fails all 64
core_reloc_btfgen subtests:

  run_core_reloc_tests:FAIL:run_btfgen unexpected error: 32512 (errno 95)
  sh: line 1: ./bpftool: No such file or directory

32512 is 127 << 8, i.e. the shell could not find the binary.

Use run_bpftool_command() from bpftool_helpers.h, which locates bpftool
via $BPFTOOL, ./tools/sbin/bpftool or ../tools/sbin/bpftool, the last of
which also covers the test_progs flavors. bpftool_helpers.c is already
in TRUNNER_EXTRA_SOURCES, so no build change is needed.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20260824195746.3070450-1-memxor@gmail.com

0 files changed, 0 insertions, 0 deletions