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Christoph Müllner

PROFILE

Christoph Müllner

Christoph Muellner contributed to both the rust-lang/gcc and openssl/openssl repositories, focusing on RISC-V architecture enhancements and stability. He implemented accurate RISC-V extension definitions and introduced RNMI interrupt support in GCC, aligning compiler behavior with updated specifications and improving regression test coverage. In openssl/openssl, Christoph expanded hardware capability detection for RISC-V in CI, adding robust capscheck validations and hardening cryptographic dispatch logic to prevent illegal traps. His work involved C and C++ programming, low-level system programming, and CI/CD integration. Across these projects, Christoph demonstrated depth in compiler development, hardware abstraction, and cross-compilation, delivering well-documented, maintainable solutions.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

9Total
Bugs
3
Commits
9
Features
3
Lines of code
170
Activity Months3

Your Network

645 people

Same Organization

@vrull.eu
1
kelefthMember

Work History

April 2026

5 Commits • 1 Features

Apr 1, 2026

April 2026 monthly summary for openssl/openssl focusing on RISC-V hwprobe CI improvements and vector crypto safety. Implemented new hwprobe-based capability detection entries, added capscheck validations, fixed range checks, and hardened AES-GCM dispatch against illegal traps. Result: earlier bug detection in CI, greater stability, and safer hardware-accelerated crypto across architectures.

July 2025

3 Commits • 2 Features

Jul 1, 2025

Concise monthly summary for July 2025 focused on rust-lang/gcc: - Delivered key RISC-V features and stabilizing fixes, aligning with updated specifications and improving test coverage. - Maintained build stability and cross-compiler compatibility by addressing warnings and removing deprecated interrupt support. - Emphasized business value through broader platform support, reduced maintenance risk, and stronger regression coverage.

June 2025

1 Commits

Jun 1, 2025

June 2025 monthly summary for rust-lang/gcc: Delivered a critical accuracy improvement for RISC-V extension definitions, addressing incorrect bit positions and replacing placeholder IDs with allocated group IDs in the riscv-ext.def. The changes align the definitions with the riscv-c-api-doc, enabling correct code generation and smoother downstream tooling for RISC-V targets.

Activity

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Quality Metrics

Correctness93.4%
Maintainability91.2%
Architecture91.2%
Performance88.8%
AI Usage20.0%

Skills & Technologies

Programming Languages

AssemblyCC++ShellYAML

Technical Skills

C programmingCI/CDCompiler DevelopmentCross-compilationDevOpsEmbedded SystemsRISC-VRISC-V ArchitectureRISC-V architectureTestingcryptographyhardware abstractionlow-level programmingsystem programming

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

openssl/openssl

Apr 2026 Apr 2026
1 Month active

Languages Used

CShellYAML

Technical Skills

C programmingCI/CDCross-compilationDevOpsRISC-VRISC-V architecture

rust-lang/gcc

Jun 2025 Jul 2025
2 Months active

Languages Used

CAssemblyC++

Technical Skills

Compiler DevelopmentEmbedded SystemsRISC-V ArchitectureRISC-V