Currently, helpers that expect ARG_PTR_TO_MAP_KEY and ARG_PTR_TO_MAP_VALUE
can only access stack and packet memory. This patchset allows these
helpers to directly access map values by passing registers of type
PTR_TO_MAP_VALUE.
The first patch changes the verifier; the second adds new test cases.
Previous versions of this patchset were sent on the iovisor-dev mailing
list only.
Changelogs:
Changes in v4:
- Rebase.
Changes in v3:
- Bug fixes.
- Negative test cases.
Changes in v2:
- Additional test cases for adjusted maps.
Paul Chaignon (2):
bpf: allow map helpers access to map values directly
tools/bpf: add verifier tests for accesses to map
kernel/bpf/verifier.c | 9 +-
tools/testing/selftests/bpf/test_verifier.c | 266 ++++++++++++++++++++++++++++
2 files changed, 274 insertions(+), 1 deletion(-)
--
2.14.1
