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Build system changes: - scripts/gen_initrd.sh packs all files from apps/ into a newc-format CPIO archive at build/isodir/boot/initrd.cpio. - CMakeLists.txt adds 'initrd' target as ISO dependency. GRUB loads the archive as a Multiboot2 module via 'module2 /boot/initrd.cpio'. - apps/README added as placeholder file for initial ramdisk content. Kernel changes: - kernel.c scans Multiboot2 tags for MULTIBOOT_TAG_TYPE_MODULE to find the initrd's physical address range, then passes it to cpio_init(). - cpio.c/h implements a parser for the SVR4/newc CPIO format: - cpio_init(): lists archive contents on startup - cpio_find(): look up a file by name (handles ./ prefix) - cpio_next(): iterate through all entries - cpio_count(): count files in archive - The initrd lives in identity-mapped physical memory, so no additional mapping is needed to access it. Verified in QEMU: GRUB loads the module at 0x0014A000, CPIO parser finds the README file (38 bytes). All existing functionality (Ring 3 processes, syscalls) continues to work.
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38 B
Plaintext
2 lines
38 B
Plaintext
This is the ClaudeOS initial ramdisk.
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