lume/include/kernel/riscv.h, branch master A general-purpose operating system with Linux ABI compatibility https://git.richardqin.org/lume/atom?h=master 2026-07-10T03:31:46Z refactor: promote new architecture to repository root 2026-07-10T03:31:46Z Richard Qin richard.qin.x@gmail.com 2026-07-10T03:31:46Z urn:sha1:e90b72ec3082588b296956730bd2930cf8d5d671 Archive the deprecated implementation under lume-legacy, make the new kernel the default root-level build, and update repository entry points without changing kernel behavior. Fix: critical malloc size calculation bug 2026-01-02T18:13:08Z Richard Qin richard.qin.x@gmail.com 2026-01-02T18:13:08Z urn:sha1:10614e04929a6d109a5e90524e446b637aaf0c13 Summary: - Fixed an integer arithmetic error in malloc() where 'nunits' was initialized to 0, causing incorrect heap sizing. - This bug caused malloc to return pointers pointing to unmapped memory pages, leading to Store Page Fault (scause 15) at process boundaries. - Switched memory allocator logic to use byte-based size calculation instead of K&R style units to prevent off-by-one errors. Improvements: - Shell now starts successfully without segfaults. dev:Refactor Memory Management and Process Management 2025-12-31T10:00:55Z Richard Qin richard.qin.x@gmail.com 2025-12-31T10:00:55Z urn:sha1:dbba25aa24f86c1f8c3a0589c82985840adc1b6b feat: Implement the first user program of the lume OS 2025-12-27T13:56:42Z Richard Qin richard.qin.x@gmail.com 2025-12-27T13:56:42Z urn:sha1:7ececbe2818510a8acaa2a2e513085c768b14d15 feat: Encapsulates the low-level hardware details of the RISC-V architecture, providing interfaces for the rest of the kernel to operate CPU registers and manage memory 2025-12-24T18:21:25Z Richard Qin richard.qin.x@gmail.com 2025-12-24T18:21:25Z urn:sha1:be71d44b9dfcf65fba3394fbd3dc2b3e06962897 Copied from the xv-6 source code.