Release v0.9.5 #178
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Release v0.9.5 #178
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- Build job only (no tests) - Tests on Intel (macos-14) and Apple Silicon (macos-14-large) - Uses Homebrew: nasm, cmake, i686-elf-gcc - Critical: CMAKE_TOOLCHAIN_FILE=tools/toolchain-i686-elf.cmake - Verifies successful build artifacts - 30 minute timeout per job
…ation feature(kernel): enable FHS initialization
- Simplify runner with straightforward test registry (no X-macros) - Add test_utils with safe non-destructive testing utilities - Refactor GDT tests to verification-only patterns - Remove destructive test files (exception, idt, interrupt) - Focus on GDT tests for framework stabilization - Update .gitignore for summary files
- Remove GDT/IDT-specific copy functions from test_utils - test_utils now contains only generic utilities (macros and helpers) - Add gdt_safe_copy as static inline in test_gdt.c - Use standard memcpy for safe read-only access - Keep test_utils.c for future non-inline utilities
feat(memory): comprehensive DMA zone allocator implementation with memory subsystem testing
Initial executable segments should be mapped as present, not COW. COW is for fork() where there's an existing backing frame to copy. Initial loads have no previous frame, causing immediate page faults.
Initial process stack should be mapped as present, not COW. COW is for fork() with shared backing. Initial stack has no previous frame.
Don't call scheduler_run() when interrupted from kernel mode. Kernel mode interrupts don't save complete pt_regs frame.
… volatile semantics
- Add __ps2_delay() for busy-wait delays with memory barriers - Add __ps2_blind_read_buffer() for clearing output buffer before writes - Add __ps2_flush_output_buffer() for flushing data with timeout - Refactor ps2_write_data/command to use __ps2_blind_read_buffer - Refactor ps2_initialize to use new helper functions throughout - Eliminates repeated delay loops and buffer flush patterns
- Compiler was eliminating CMOS register reads in Release builds - Replaced read_register() calls with direct inline assembly in rtc_read_datetime() - Added NMI disable, I/O wait cycles, and memory barriers - Improved diagnostics: UIP timeout, all-zero/0xFF reads, mirrored index detection - Added proper I/O wait helper using port 0x80 - RTC now works correctly in both Debug and Release modes
Replaced 7 duplicate inline assembly blocks with calls to __rtc_read_cmos_direct(). Improves code readability while maintaining unoptimizable inline assembly behavior.
- Fixed volatile semantics in paging test loops to prevent optimization - Added proper memory barriers and volatile declarations - Ensured tests work correctly in both Debug and Release builds
…frame - Replaced ISR_NOERR/ISR_ERR macros with single unified ISR macro - Added intelligent privilege level detection (kernel vs user mode) - Normalize stack frame by conditionally pushing SS/UESP in kernel mode - Ensures pt_regs struct alignment matches actual stack layout - Fixes crashes when accessing SS register from kernel exceptions
…rnel exceptions - Removed overly complex stack frame normalization logic - Simplified isr_common to standard register save/restore - Made PRINT_REGS conditional: only access SS/UESP for user mode exceptions - Prevents crashes when exception handlers try to print register state - Exception frame is now simpler and less error-prone
fix(syscall): return negative ENOSYS for invalid syscall numbers
Changed port I/O constraints from 'dN' to 'd' to force dx register usage. The 'dN' constraint allowed compiler to use immediate values in Release mode, but assembly instructions always used %%dx, causing I/O on wrong ports. This fixed years-long issue where OS only booted in Debug mode.
Reverted temporary changes used for debugging: - Removed forced Release compilation for userspace programs and libc - Restored normal CMAKE_BUILD_TYPE optimization flags - Changed log levels back from DEBUG to NOTICE The critical I/O port fix remains in place.
Fix Release boot by correcting port I/O inline asm constraints
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Release v0.9.5
This release focuses on kernel stability, comprehensive testing infrastructure, and proper memory zone management with DMA support.
Major Changes
Memory Management & DMA Zone
Testing Infrastructure
Kernel Stability & Correctness
Code Quality & Refactoring
Build System & Platform Support
Features
Statistics
Upgrade Notes
No breaking changes expected. This is a drop-in upgrade from v0.9.4.
Testing
All unit tests pass in both Debug and Release builds. QEMU integration tests validated on Linux.