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 registers)
- 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.
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.