EBPF: Difference between revisions

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 LLVM has enjoyed <tt>bpf</tt> backend support since 3.7. Compile using <tt>-target bpf</tt> to generate BPF bytecode, adding <tt>-g</tt> to generate BTF information.
-<tt>readelf</tt> on the resulting object ought look like:
+<tt>readelf</tt> on the resulting object ought indicate a <tt>Machine</tt> of "Linux BPF" or "EM_BPF". The resulting object can be loaded into the kernel with <tt>bpftool prog load</tt> or libbpf's <tt>bpf_object__open()</tt>.
-<pre>
-ELF Header:
-  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00
-  Class:                             ELF64
-  Data:                              2's complement, little endian
-  Version:                           1 (current)
-  OS/ABI:                            UNIX - System V
-  ABI Version:                       0
-  Type:                              REL (Relocatable file)
-  Machine:                           Linux BPF
-  Version:                           0x1
-  Entry point address:               0x0
-  Start of program headers:          0 (bytes into file)
-  Start of section headers:          360 (bytes into file)
-  Flags:                             0x0
-...
-</pre>
-The resulting object can be loaded into the kernel with <tt>bpftool prog load</tt> or libbpf's <tt>bpf_object__open()</tt>.
 ===JIT===