| # Zircon |
| |
| Zircon is the core platform that powers Fuchsia. Zircon is |
| composed of a kernel (source in [/zircon/kernel](/zircon/kernel)) |
| as well as a small set of userspace services, drivers, and libraries |
| (source in [/zircon/system/](/zircon/system)) necessary for the system |
| to boot, talk to hardware, load userspace processes and run them, etc. |
| Fuchsia builds a much larger OS on top of this foundation. |
| |
| The canonical Zircon repository is part of the Fuchsia project |
| at: [https://fuchsia.googlesource.com/fuchsia/+/HEAD/zircon/](/zircon/) |
| |
| The Zircon Kernel provides syscalls to manage processes, threads, |
| virtual memory, inter-process communication, waiting on object state |
| changes, and locking (via futexes). |
| |
| Currently there are some temporary syscalls that have been used for early |
| bringup work, which will be going away in the future as the long term |
| syscall API and ABI surface is finalized. The expectation is that there will |
| be about 100 syscalls. |
| |
| Zircon syscalls are generally non-blocking. The `wait_one`, `wait_many` |
| `port_wait` and `thread sleep` being the notable exceptions. |
| |
| This page is a non-comprehensive index of the zircon documentation. |
| |
| + [Getting Started](/docs/development/kernel/getting_started.md) |
| + [Contributing |
| Patches to Zircon](/docs/development/source_code/contribute_changes.md#contributing-patches-to-zircon) |
| |
| + [Zircon Concepts](/docs/concepts/kernel/concepts.md) |
| + [Kernel Objects](/docs/reference/kernel_objects/objects.md) |
| + [Kernel Invariants](kernel_invariants.md) |
| + [Kernel Scheduling](kernel_scheduling.md) |
| + [Kernel Thread Signaling](kernel_thread_signaling.md) |
| + [Fair Scheduler](fair_scheduler.md) |
| + [Errors](errors.md) |
| + [Time units](/docs/development/kernel/time.md) |
| |
| + [Process Objects](/docs/reference/kernel_objects/process.md) |
| + [Thread Objects](/docs/reference/kernel_objects/thread.md) |
| + [Thread local storage](/docs/development/kernel/threads/tls.md) |
| + [Thread annotations](/docs/development/kernel/threads/thread_annotations.md) |
| + [Handles](/docs/concepts/kernel/handles.md) |
| + [Lock validation](lockdep.md) |
| + [System Calls](/reference/syscalls) |
| + [zxcrypt](/docs/concepts/filesystems/zxcrypt.md) |
| |
| + [Driver framework (DFv2)](/docs/concepts/drivers/driver_framework.md) |
| + [Driver interfaces - audio overview](/docs/development/audio/drivers/overview.md) |
| |
| + [libc](/docs/development/languages/c-cpp/libc.md) |
| + [C++ fpromise::promise<> guide](/docs/development/languages/c-cpp/fpromise_promise_guide.md) |
| |
| + [Testing](/docs/development/testing/testing.md) |
| + [Kernel tracing](/docs/development/tracing/advanced/recording-a-kernel-trace.md) |
| + [Block device testing](/docs/development/testing/block_device_testing.md) |
| + [nand Testing](/docs/development/testing/nand_testing.md) |
| |
| + [Compile-time object collections](/docs/development/languages/c-cpp/compile_time_object_collections.md) |
| + [ACPI debugging](/docs/development/debugging/acpi.md) |
| + [Entropy collection TODOs](/docs/concepts/kernel/jitterentropy/entropy_collection_todos.md) |
| + [Memory usage analysis tools](/docs/development/kernel/memory/memory.md) |
| + [Symbolizer](/docs/reference/kernel/symbolizer_markup.md) |
| + [Relationship with LK](zx_and_lk.md) |
| + [Viewing microbenchmarks with Chromeperf](/docs/development/performance/chromeperf_user_guide.md) |
| + [Avoiding a problem with the SYSRET instruction](sysret_problem.md) |
