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| author | Christoph Hellwig <hch@lst.de> | 2021-12-23 11:19:03 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-12-31 01:31:44 +0100 |
| commit | fa86aa77d4da211fc814325cdb3a572b1b851058 (patch) | |
| tree | 8c1f0e7ff0e97cdb41a3838fa11ce39537813469 /Documentation/bpf | |
| parent | Merge branch 'lighten uapi/bpf.h rebuilds' (diff) | |
| download | linux-fa86aa77d4da211fc814325cdb3a572b1b851058.tar.xz linux-fa86aa77d4da211fc814325cdb3a572b1b851058.zip | |
bpf, docs: Fix verifier references
Use normal RST file reference instead of linkage copied from the old filter.rst
document that does not actually work when using HTML output.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211223101906.977624-2-hch@lst.de
Diffstat (limited to 'Documentation/bpf')
| -rw-r--r-- | Documentation/bpf/instruction-set.rst | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/Documentation/bpf/instruction-set.rst b/Documentation/bpf/instruction-set.rst index fa7cba59031e..fa469078301b 100644 --- a/Documentation/bpf/instruction-set.rst +++ b/Documentation/bpf/instruction-set.rst @@ -203,7 +203,7 @@ Some core changes of the eBPF format from classic BPF: bpf_exit After the call the registers R1-R5 contain junk values and cannot be read. - An in-kernel `eBPF verifier`_ is used to validate eBPF programs. + An in-kernel verifier.rst is used to validate eBPF programs. Also in the new design, eBPF is limited to 4096 insns, which means that any program will terminate quickly and will only call a fixed number of kernel @@ -234,7 +234,7 @@ optimizations, socket filters and seccomp are using it as assembler. Tracing filters may use it as assembler to generate code from kernel. In kernel usage may not be bounded by security considerations, since generated eBPF code may be optimizing internal code path and not being exposed to the user space. -Safety of eBPF can come from the `eBPF verifier`_. In such use cases as +Safety of eBPF can come from the verifier.rst. In such use cases as described, it may be used as safe instruction set. Just like the original BPF, eBPF runs within a controlled environment, @@ -462,6 +462,3 @@ of two consecutive ``struct bpf_insn`` 8-byte blocks and interpreted as single instruction that loads 64-bit immediate value into a dst_reg. Classic BPF has similar instruction: ``BPF_LD | BPF_W | BPF_IMM`` which loads 32-bit immediate value into a register. - -.. Links: -.. _eBPF verifier: verifiers.rst |