2 Commits

Author	SHA1	Message	Date
AI	c25ba1fccd	feat: shell (sh) with keyboard driver, SYS_READ, SYS_EXEC ... - PS/2 keyboard driver: IRQ1 handler, scancode set 1 translation, ring buffer, shift key support - SYS_READ (fd=0): non-blocking keyboard read for stdin - SYS_YIELD: calls schedule_tick directly (no nested INT 0x80) - SYS_EXEC: loads binary from CPIO initrd, replaces process image - User-space libc: crt0.S (C runtime startup), syscalls.h (inline syscall wrappers, basic string functions) - Shell app (sh): readline with echo/backspace, builtins (cd, env, help, exit), fork+exec for external commands - Updated build_apps.sh: C app support with crt0 linking, libc include path, .bss section in objcopy Tested: shell boots, keyboard input works, hello-world runs via fork+exec, env shows CWD, exit cleanly terminates.	2026-02-23 13:08:06 +00:00
AI	a6e6e3d8ca	feat: hello-world user-mode app loaded from initrd via VFS ... - Created apps/hello-world/hello-world.S: AT&T assembly user program that calls SYS_WRITE to print 'Hello, World' then SYS_EXIT(0) - Created apps/user.ld: linker script for user apps at 0x08048000 - Created scripts/build_apps.sh: builds each app dir into flat binary - Updated CMakeLists.txt: added apps build target in ISO pipeline - Updated gen_initrd.sh: packs built binaries from build/apps_bin/ - Updated kernel.c: replaced inline machine code with VFS-based loading of hello-world from /initrd/hello-world via cpio_find() Verified: hello-world binary (49 bytes) loads from CPIO initrd, prints 'Hello, World', and exits with code 0.	2026-02-23 12:30:36 +00:00