AI
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c25ba1fccd
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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.
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2026-02-23 13:08:06 +00:00 |
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