Commit 1c26ac6a authored by Andrei Matei's avatar Andrei Matei Committed by Daniel Borkmann
Browse files

selftest/bpf: Fix rst formatting in readme 



A couple of places in the readme had invalid rst formatting causing the
rendering to be off. This patch fixes them with minimal edits.

Signed-off-by: default avatarAndrei Matei <andreimatei1@gmail.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20201122022205.57229-2-andreimatei1@gmail.com
parent 05a98d76

tools/testing/selftests/bpf/README.rst

+15 −13
Original line number Diff line number Diff line
@@ -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

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