x86 / amd64 library 
Library to program x86 (amd64) hardware. Contains x86 specific data structure descriptions, data-tables, as well as convenience function to call assembly instructions typically not exposed in higher level languages.
Currently supports
- I/O registers
- Control registers
- MSR registers
- Segmentation
- Descriptor-tables (GDT, LDT, IDT)
- IA32-e page table layout
- Interrupts (with xAPIC and x2APIC, I/O APIC drivers)
- Task state
- Performance counter information
- Intel SGX: Software Guard Extensions
- Random numbers (rdrand, rdseed)
- Time (rdtsc, rdtscp)
- Querying CPUID (uses raw_cpuid library)
- Transactional memory (Intel RTM and HLE)
This library depends on libcore so it can be used in kernel level code.
Testing
We use two forms of tests for the crate. Regular tests with #[test] that run in a ring 3 process
and #[x86test] tests that run in a VM (and therefore grant a privileged execution environment, see x86test).
# To execute x86tests run:
$ RUSTFLAGS="-C relocation-model=dynamic-no-pic -C code-model=kernel" RUST_BACKTRACE=1 cargo test --features vmtest
# To execute the regular tests, run:
$ cargo test --features utest
Features
- performance-counter: Includes the performance counter information. Note this feature can increase compilation time significantly due to large, statically generated hash-tables that are included in the source. Therefore, it is disabled by default.