CTSRD-CHERI/cheribuild
Jun 2025 – Oct 2025
4 Months active
Languages Used
Python
Technical Skills
Build System ConfigurationBuild SystemsCross-CompilationEmbedded SystemsEmbedded Systems DevelopmentSDK Integration
Hesham Almatary
PROFILE
Hesham Almatary
Worked on the CTSRD-CHERI/cheribuild repository to deliver cross-architecture build and integration features for the CHERI ecosystem, focusing on embedded systems and kernel development. Implemented CHERI support across SE-L4 and Microkit, integrated the CHERI Alliance SDK with LLVM and QEMU, and enabled end-to-end Linux kernel cross-compilation and testing for AArch64 and RISC-V. Enhanced CI/CD reliability by stabilizing build workflows, standardizing sysroot handling, and improving configuration management. Addressed compatibility issues with Busybox and Linux kernel updates, documenting changes for future audits. Leveraged Python for build system automation, emphasizing cross-compilation, SDK integration, and system programming throughout the development process.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
10Total
Bugs
2
Commits
10
Features
4
Lines of code
1,343
Activity Months4
Your Network
20 peopleShared Repositories
20
Work History
October 2025
1 Commits
Oct 1, 2025Month: 2025-10 - Concise monthly summary for CTSRD-CHERI/cheribuild focused on Busybox build compatibility with Linux kernel 6.8+. The primary effort this month was addressing a kernel-change impact by disabling Busybox CONFIG_TC to maintain build reliability for CI and downstream users. The change was documented with a clear rationale referencing bug reports and mailing list discussions to support future reviews and audits.
1 Commits
Oct 1, 2025Month: 2025-10 - Concise monthly summary for CTSRD-CHERI/cheribuild focused on Busybox build compatibility with Linux kernel 6.8+. The primary effort this month was addressing a kernel-change impact by disabling Busybox CONFIG_TC to maintain build reliability for CI and downstream users. The change was documented with a clear rationale referencing bug reports and mailing list discussions to support future reviews and audits.
October 2025
September 2025
2 Commits • 2 Features
Sep 1, 2025Month: 2025-09 Key features delivered: - Linux kernel cross-compile support: Added new targets to cross-compile the Linux kernel using LLVM for AArch64 and RISC-V, plus a QEMU launch class to package and run these kernels, enabling building and testing Linux kernels within cheribuild on Morello and CHERI-Alliance platforms. (Commit 737eafcf77f89e6577ec6ded3464153822e5d74e) - Sysroot path standardization for MorelloBaremetal and Freestanding targets: Standardizes sysroot directory handling and ensures the target triple is appended to the sysroot path, aligning with Freestanding target conventions and accommodating expected layouts for Newlib and GCC within cheribuild. (Commit 0972b1599bf2333196bf3fb11f1e8649425489ec) Major bugs fixed: - No notable bugs fixed this month. Overall impact and accomplishments: - Enables end-to-end Linux kernel development and testing workflows within cheribuild for Morello and CHERI-Alliance platforms, reducing setup time for developers and expanding platform coverage. The sysroot standardization improves build reliability and consistency across targets, supporting more predictable CI and local development. Technologies/skills demonstrated: - Cross-compilation workflows with LLVM for AArch64 and RISC-V; QEMU-based kernel testing; cheribuild platform targeting; sysroot conventions; MorelloBaremetal/Freestanding alignment; CHERI-Alliance ecosystem.
September 2025
2 Commits • 2 Features
Sep 1, 2025Month: 2025-09 Key features delivered: - Linux kernel cross-compile support: Added new targets to cross-compile the Linux kernel using LLVM for AArch64 and RISC-V, plus a QEMU launch class to package and run these kernels, enabling building and testing Linux kernels within cheribuild on Morello and CHERI-Alliance platforms. (Commit 737eafcf77f89e6577ec6ded3464153822e5d74e) - Sysroot path standardization for MorelloBaremetal and Freestanding targets: Standardizes sysroot directory handling and ensures the target triple is appended to the sysroot path, aligning with Freestanding target conventions and accommodating expected layouts for Newlib and GCC within cheribuild. (Commit 0972b1599bf2333196bf3fb11f1e8649425489ec) Major bugs fixed: - No notable bugs fixed this month. Overall impact and accomplishments: - Enables end-to-end Linux kernel development and testing workflows within cheribuild for Morello and CHERI-Alliance platforms, reducing setup time for developers and expanding platform coverage. The sysroot standardization improves build reliability and consistency across targets, supporting more predictable CI and local development. Technologies/skills demonstrated: - Cross-compilation workflows with LLVM for AArch64 and RISC-V; QEMU-based kernel testing; cheribuild platform targeting; sysroot conventions; MorelloBaremetal/Freestanding alignment; CHERI-Alliance ecosystem.
July 2025
4 Commits • 1 Features
Jul 1, 2025Month: 2025-07 — Delivered a new CheriSel4Exercises target in cheribuild, enabling unified build/test workflows for CHERI Exercises and Missions across architectures. Strengthened build-system stability and CI reliability with targeted fixes to Alliance SDK sysroot path, project sequencing for opensbi.py, and improved libdir resolution on aarch64 hosts. These changes enhance cross-architecture testing, reduce CI flakiness, and improve overall maintainability and reliability of the CheriBuild pipeline.
4 Commits • 1 Features
Jul 1, 2025Month: 2025-07 — Delivered a new CheriSel4Exercises target in cheribuild, enabling unified build/test workflows for CHERI Exercises and Missions across architectures. Strengthened build-system stability and CI reliability with targeted fixes to Alliance SDK sysroot path, project sequencing for opensbi.py, and improved libdir resolution on aarch64 hosts. These changes enhance cross-architecture testing, reduce CI flakiness, and improve overall maintainability and reliability of the CheriBuild pipeline.
July 2025
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025: CHERI ecosystem integration delivered in cheribuild, enabling CHERI support across SE-L4 and Microkit, integrating CHERI Alliance SDK (LLVM and QEMU), and adding a dedicated GDB build target for CHERI Alliance. This work closes critical integration gaps, accelerates end-to-end CHERI workflows, and lays groundwork for forthcoming features.
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025: CHERI ecosystem integration delivered in cheribuild, enabling CHERI support across SE-L4 and Microkit, integrating CHERI Alliance SDK (LLVM and QEMU), and adding a dedicated GDB build target for CHERI Alliance. This work closes critical integration gaps, accelerates end-to-end CHERI workflows, and lays groundwork for forthcoming features.
Activity
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Quality Metrics
Correctness91.0%
Maintainability92.0%
Architecture91.0%
Performance83.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Python
Technical Skills
Build System ConfigurationBuild SystemsBuild systemsCI/CDConfiguration ManagementCross-CompilationCross-compilationEmbedded SystemsEmbedded Systems DevelopmentEmbedded systemsKernel developmentLLVMMicrokernel DevelopmentQEMUSDK Integration
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