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43 lines
1.1 KiB
Markdown
43 lines
1.1 KiB
Markdown
# aya-obj - an eBPF object file loading library
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## Overview
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eBPF programs written with [libbpf] or [aya-bpf] are usually compiled
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into an ELF object file, using various section to store information
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about the eBPF programs.
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`aya-obj` is a library that loads, parses and processes such eBPF
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object files.
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[libbpf]: https://github.com/libbpf/libbpf
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[aya-bpf]: https://github.com/aya-rs/aya
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## Example
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This example loads a simple eBPF program and runs it with [rbpf].
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```rust
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use aya_bpf::Object;
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// Parse the object file
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let bytes = std::fs::read("program.o").unwrap();
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let mut object = Object::parse(bytes).unwrap();
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// Relocate the programs
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object.relocate_calls().unwrap();
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object.relocate_maps(std::iter::empty()).unwrap();
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// Run with rbpf
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let program = object.programs.iter().next().unwrap().1;
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let instructions = &program.function.instructions;
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let data = unsafe {
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from_raw_parts(
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instructions.as_ptr() as *const u8,
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instructions.len() * size_of::<bpf_insn>(),
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)
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};
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let vm = rbpf::EbpfVmNoData::new(Some(data)).unwrap();
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let _return = vm.execute_program().unwrap();
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```
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[rbpf]: https://github.com/qmonnet/rbpf
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