TermiNexus
f4c653958e
devfs：新增 /dev/fb0（framebuffer_device），提供 ioctl(FB_GET_INFO) 回填几何/格式/物理区间，并新增 devfs_file.mmap_info 虚方法（默认不可映射）把物理区间交给内核 mmap 用；main.vp 在 devfs_init 后登记它。输入设备（/dev/input/keyboard、/dev/input/mouse）此前已存在，本轮起从用户态可达。 用户态可达性：Process 增 fd_kind[]（0=FAT32 fileobj*，1=devfs_fd+1），OPEN 对 "/dev/" 前缀改走 devfs，READ/WRITE/CLOSE 按 kind 分派；Process.exit 只对 kind=0 调 fat32.close（把 devfs fd 当 fileobj* 会跑飞）。fd 种类常量放在 process.vp 供 syscall.vp 引用，避免 process 反向 import devfs（devfs→keyboard/mouse→intr.idt→sched→process 会成环）。 新增 IOCTL syscall（Linux 号 16，本轮开始实现）：只放给 devfs 设备，SDK 侧 vpsdk/fs.vp 加 ioctl() 助手。
142 lines
4.3 KiB
Plaintext
142 lines
4.3 KiB
Plaintext
from . import syscall as syscall
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define O_RDONLY = 0x01
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define O_WRONLY = 0x02
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define O_RDWR = 0x03
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define O_CREAT = 0x04
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define O_TRUNC = 0x08
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define O_APPEND = 0x30
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define SEEK_SET = 0
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define SEEK_CUR = 1
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define SEEK_END = 2
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define DT_UNKNOWN = 0
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define DT_FILE = 1
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define DT_DIR = 2
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def open(path: const str, flags: uint32) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.OPEN), uint64(path), uint64(flags), 0))
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def close(fd: int) -> int:
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return int(syscall._syscall1(uint64(syscall.Syscall.CLOSE), uint64(fd)))
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def read(fd: int, buf: rawptr, count: uint32) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.READ), uint64(fd), uint64(buf), uint64(count)))
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def write(fd: int, buf: rawptr, count: uint32) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.WRITE), uint64(fd), uint64(buf), uint64(count)))
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def seek(fd: int, offset: uint32) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.SEEK), uint64(fd), uint64(offset), 0))
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def tell(fd: int) -> uint32:
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return uint32(syscall._syscall1(uint64(syscall.Syscall.TELL), uint64(fd)))
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def fsize(fd: int) -> uint32:
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return uint32(syscall._syscall1(uint64(syscall.Syscall.SIZE), uint64(fd)))
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def mkdir(path: const str) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.MKDIR), uint64(path), 0, 0))
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def remove(path: const str) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.REMOVE), uint64(path), 0, 0))
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def opendir(path: const str) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.OPENDIR), uint64(path), 0, 0))
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def readdir(dd: int, info: rawptr) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.READDIR), uint64(dd), uint64(info), 0))
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def closedir(dd: int) -> int:
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return int(syscall._syscall1(uint64(syscall.Syscall.CLOSEDIR), uint64(dd)))
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def stat(path: const str, info: rawptr) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.STAT), uint64(path), uint64(info), 0))
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def ioctl(fd: int, request: uint32, arg: rawptr) -> int:
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"""设备控制（Linux ioctl 子集）。当前只有 devfs 设备（如 /dev/fb0）实现了它。"""
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return int(syscall._syscall3(uint64(syscall.Syscall.IOCTL), uint64(fd), uint64(request), uint64(arg)))
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class FileIO:
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_fd: int
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_pos: uint32
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_size: uint32
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_flags: uint32
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_closed: int
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def __init__(self, fd: int, flags: uint32):
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self._fd = fd
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self._flags = flags
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self._pos = 0
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self._size = fsize(fd)
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self._closed = 0
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def read(self, buf: rawptr, count: uint32) -> int:
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if self._closed: return -1
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n: int = read(self._fd, buf, count)
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if n > 0:
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self._pos = self._pos + uint32(n)
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return n
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def write(self, buf: rawptr, count: uint32) -> int:
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if self._closed: return -1
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n: int = write(self._fd, buf, count)
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if n > 0:
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self._pos = self._pos + uint32(n)
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if self._pos > self._size:
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self._size = self._pos
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return n
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def seek(self, offset: uint32) -> int:
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if self._closed: return -1
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res: int = seek(self._fd, offset)
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if res == 0:
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self._pos = offset
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return res
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def tell(self) -> uint32:
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return self._pos
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def size(self) -> uint32:
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return self._size
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def close(self) -> int:
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if self._closed: return 0
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self._closed = 1
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return close(self._fd)
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def is_closed(self) -> int:
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return self._closed
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class DirIO:
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_dd: int
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_closed: int
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def __init__(self, dd: int):
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self._dd = dd
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self._closed = 0
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def read(self, info: rawptr) -> int:
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if self._closed: return -1
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return readdir(self._dd, info)
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def close(self) -> int:
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if self._closed: return 0
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self._closed = 1
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return closedir(self._dd)
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def is_closed(self) -> int:
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return self._closed
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def open_file(path: const str, flags: uint32) -> FileIO:
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fd: int = open(path, flags)
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if fd < 0: return None
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return FileIO(fd, flags)
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def open_dir(path: const str) -> DirIO:
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dd: int = opendir(path)
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if dd < 0: return None
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return DirIO(dd)
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