diff options
| -rw-r--r-- | tools/testing/selftests/bpf/README.rst | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/tools/testing/selftests/bpf/README.rst b/tools/testing/selftests/bpf/README.rst index 3b8d8885892d..ca064180d4d0 100644 --- a/tools/testing/selftests/bpf/README.rst +++ b/tools/testing/selftests/bpf/README.rst @@ -33,11 +33,12 @@ The verifier will reject such code with above error. At insn 18 the r7 is indeed unbounded. The later insn 19 checks the bounds and the insn 20 undoes map_value addition. It is currently impossible for the verifier to understand such speculative pointer arithmetic. -Hence - https://reviews.llvm.org/D85570 -addresses it on the compiler side. It was committed on llvm 12. +Hence `this patch`__ addresses it on the compiler side. It was committed on llvm 12. + +__ https://reviews.llvm.org/D85570 The corresponding C code + .. code-block:: c for (int i = 0; i < MAX_CGROUPS_PATH_DEPTH; i++) { @@ -80,10 +81,11 @@ The symptom for ``bpf_iter/netlink`` looks like 17: (7b) *(u64 *)(r7 +0) = r2 only read is supported -This is due to a llvm BPF backend bug. The fix - https://reviews.llvm.org/D78466 +This is due to a llvm BPF backend bug. `The fix`__ has been pushed to llvm 10.x release branch and will be -available in 10.0.1. The fix is available in llvm 11.0.0 trunk. +available in 10.0.1. The patch is available in llvm 11.0.0 trunk. + +__ https://reviews.llvm.org/D78466 BPF CO-RE-based tests and Clang version ======================================= @@ -97,11 +99,11 @@ them to Clang/LLVM. These sub-tests are going to be skipped if Clang is too old to support them, they shouldn't cause build failures or runtime test failures: - - __builtin_btf_type_id() ([0], [1], [2]); - - __builtin_preserve_type_info(), __builtin_preserve_enum_value() ([3], [4]). +- __builtin_btf_type_id() [0_, 1_, 2_]; +- __builtin_preserve_type_info(), __builtin_preserve_enum_value() [3_, 4_]. - [0] https://reviews.llvm.org/D74572 - [1] https://reviews.llvm.org/D74668 - [2] https://reviews.llvm.org/D85174 - [3] https://reviews.llvm.org/D83878 - [4] https://reviews.llvm.org/D83242 +.. _0: https://reviews.llvm.org/D74572 +.. _1: https://reviews.llvm.org/D74668 +.. _2: https://reviews.llvm.org/D85174 +.. _3: https://reviews.llvm.org/D83878 +.. _4: https://reviews.llvm.org/D83242 |