Low-Level Systems Programming Internals

Translate a virtual address manually by walking four-level x86-64 page tables.

Implement a physical-frame allocator from a bootloader-provided memory map.

Implement a kernel routine that maps a virtual page with selected permissions.

Construct an independent page-table root for a new user address space.

Implement demand allocation of a zero-filled page from a page fault.

Verify address-space isolation and stale-translation handling with targeted kernel tests.

Enter x86-64 ring 3 to execute a minimal user program.

Define a trap-frame representation that preserves a user task's execution state.

Implement an x86-64 context switch between two kernel-managed tasks.

Implement preemptive round-robin scheduling with a periodic timer interrupt.

Validate a userspace pointer before copying data across the kernel boundary.

Implement a bounded message channel between two isolated user address spaces.

Map browser, renderer, and GPU processes to explicit assets and trust boundaries.

Launch a renderer process inside Linux user, mount, PID, and network namespaces.

Derive a minimal seccomp-BPF syscall allowlist from an observed renderer workload.

Apply a seccomp-BPF filter to an untrusted renderer process.

Implement a broker that passes an approved file descriptor to a sandboxed process.

Test a renderer sandbox with probes for forbidden syscalls, files, processes, and network access.

Implement a tokenizer for a defined subset of HTML tokens.

Build a DOM tree from the supported HTML token stream.

Implement a parser for a defined subset of CSS rules and declarations.

Match simple CSS selectors against DOM elements.

Resolve cascade precedence and inheritance for supported CSS properties.

Construct a styled tree containing the computed values required by layout.

Compute content, padding, border, and margin dimensions from supported CSS box-model values.

Implement top-to-bottom block layout for normal-flow elements.

Lay out inline text runs using metrics returned by a text-shaping library.

Implement clipping and scroll offsets for overflowing layout boxes.

Generate a paint-ordered display list from the laid-out document.

Identify the layout and paint regions invalidated by a localized style change.

Rasterize solid rectangles, borders, and glyph runs from a display list into a CPU pixel buffer.

Partition a rendered surface into tiles and rerasterize only damaged tiles.

Represent stacking contexts as a compositing-layer tree.

Render textured layer quads through a GPU API from Rust.

Synchronize CPU updates and GPU presentation with a bounded set of frame resources.

Measure frame time and locate CPU, upload, or GPU bottlenecks in the rendering pipeline.

Separate browser-control, renderer, and GPU responsibilities into three operating-system processes.

Define a versioned IPC schema for navigation, input, display-list, and frame messages.

Transfer large rendering payloads through shared memory while sending control metadata over IPC.

Validate untrusted renderer messages before they reach browser or GPU capabilities.

Run the renderer of the integrated prototype under the namespace and seccomp sandbox.

Evaluate the prototype against functional, isolation, crash-containment, and frame-time targets.