This commit represents the progress I've made on migrating your codebase from
the temporary KASSERT_PLACEHOLDER macro to the new KASSERT macro
defined in <sys/kassert.h>.
**Work Completed:**
* **`minix/kernel/` (root directory files):**
* I processed all 30 `.c` and `.h` files in this directory.
* I found and replaced `KASSERT_PLACEHOLDER` with `KASSERT` (and included `<sys/kassert.h>`) in 6 files: `debug.c`, `interrupt.c`, `main.c`, `proc.c`, `smp.c`, and `system.c`.
* **`minix/kernel/system/` (system call handlers):**
* I processed all 38 `.c` files in this directory.
* I found and replaced `KASSERT_PLACEHOLDER` with `KASSERT` (and included `<sys/kassert.h>`) in 6 files: `do_copy.c`, `do_fork.c`, `do_mcontext.c`, `do_runctl.c`, `do_safecopy.c`, and `do_vumap.c`.
**Total Progress:**
* Files processed: 68
* Files with KASSERT migrations: 12
**Next Steps:**
My original plan was to continue this migration for the `arch/i386/` and `arch/earm/` directories.
**Reason for Current Status:**
This is the last turn allowed for our current session.
**Your Feedback Incorporated into Future Work Considerations:**
You have provided an exceptionally detailed "Technical Review: KASSERT Migration Progress Analysis." I've received this review and it will be invaluable for guiding the continuation of this work. Key points from your feedback include:
* **Validation:** Implementing post-migration validation steps to ensure completeness and correct include usage.
* **Arch-Specific Expectations:** Anticipating higher assertion density in specific files within `arch/i386` (e.g., `memory.c`, `protect.c`) and `arch/earm`.
* **Potential Issues:** Watching for conditional compilation conflicts (`DEBUG` vs. `DEBUG_KERNEL`) and ensuring C-only constructs from KASSERT don't affect assembly-visible headers.
* **Continuation Protocol:** You recommend proceeding with `arch/i386` using the established methodology, maintaining granular tracking, and flagging anomalies.
* **Optimization Opportunities:** Considering a migration log and preparing for potential macro expansion issues.
This update captures the state of the KASSERT migration before I address the `arch/` directories and before I fully incorporate the detailed verification and logging strategies from your latest feedback. I will resume based on this feedback in our next session.
This commit addresses critical architectural deficiencies in the MINIX kernel build and source structure. The changes are based on a comprehensive technical review and aim to establish a cleaner, more robust foundation for future kernel development.
Key changes include:
1. **Kernel-Specific Type System:**
* I introduced `minix/kernel/include/minix/kernel_types.h`.
* I defined kernel-specific types (e.g., `k_size_t`, `k_pid_t`) and fixed-width integer types (e.g., `k_uint32_t`) to replace userspace types.
2. **Kernel-Space Library (`klib`):**
* I created a new kernel library (`klib`) located in `minix/kernel/klib/`.
* I implemented basic string functions (`kstrlen`, `kstrlcpy`, `kstrcmp`) in `kstring.c`.
* I implemented basic memory functions (`kmemcpy`, `kmemset`, `kmemmove`) in `kmemory.c`.
* I added stub implementations for `kprintf`, `ksprintf`, and `kvprintf` in `kprintf_stub.c`, along with a `KASSERT_PLACEHOLDER` macro.
3. **Purged Userspace Dependencies:**
* I systematically refactored all C and header files within `minix/kernel/` and its subdirectories (`system/`, `arch/i386/`, `arch/earm/`).
* I removed userspace includes (e.g., `<string.h>`, `<stdlib.h>`, `<stdio.h>`, `<assert.h>`, `<sys/types.h>`, `<signal.h>`, `<unistd.h>`).
* I replaced calls to userspace C library functions with their `klib` equivalents or marked them with `FIXME` comments if a direct replacement was not yet available (e.g., `atoi`, `strncmp`).
* I replaced userspace types with their `k_` prefixed kernel versions.
4. **Build System Reconstruction (Meson):**
* I replaced `minix/kernel/meson.build` with a new script designed for a proper kernel build.
* The new build system defines kernel-specific compiler flags, handles architecture detection (i386, x86_64), sets up correct include paths, and builds `klib` and the main kernel executable.
* Assembly file compilation and linkage are noted as TODOs in the Meson script.
**Next Steps & Known Issues:**
The kernel is not expected to build successfully immediately after these changes. A significant number of `FIXME` comments and identified issues need to be addressed in a proper build environment. These include:
* Defining numerous missing constants (error numbers, signal numbers, etc.).
* Providing kernel-safe implementations for macros like `offsetof`.
* Implementing missing `klib` functions (e.g., a real `kprintf`, `kstrncmp`, `kmemcmp`, `katoi`).
* Developing kernel-space signal handling and ELF loading mechanisms.
* Adding rules for compiling and linking assembly source files.
This refactoring establishes the necessary structure to tackle these remaining issues systematically.
