1ab5c8ca4Slogin use core::{ 2ab5c8ca4Slogin ffi::{c_char, c_int, c_void, CStr}, 3ab5c8ca4Slogin sync::atomic::{AtomicBool, Ordering}, 4ab5c8ca4Slogin }; 5ab5c8ca4Slogin 640314b30SXiaoye Zheng use crate::kdebug; 740314b30SXiaoye Zheng 8676b8ef6SMork use num_traits::{FromPrimitive, ToPrimitive}; 9676b8ef6SMork 10ab5c8ca4Slogin use crate::{ 111496ba7bSLoGin arch::{cpu::cpu_reset, interrupt::TrapFrame, MMArch}, 122dbef785SGnoCiYeH driver::base::{block::SeekFrom, device::DeviceNumber}, 13ab5c8ca4Slogin filesystem::vfs::{ 146d81180bSLoGin fcntl::FcntlCommand, 15ab5c8ca4Slogin file::FileMode, 162dbef785SGnoCiYeH syscall::{ModeType, PosixKstat, SEEK_CUR, SEEK_END, SEEK_MAX, SEEK_SET}, 17ab5c8ca4Slogin MAX_PATHLEN, 18ab5c8ca4Slogin }, 191496ba7bSLoGin include::bindings::bindings::{PAGE_2M_SIZE, PAGE_4K_SIZE}, 20aa0367d6SLoGin kinfo, 2140fe15e0SLoGin libs::align::page_align_up, 22be63f3b2Shoumkh mm::{verify_area, MemoryManagementArch, VirtAddr}, 23ab5c8ca4Slogin net::syscall::SockAddr, 241496ba7bSLoGin process::Pid, 2536fd0130Shoumkh time::{ 2640fe15e0SLoGin syscall::{PosixTimeZone, PosixTimeval}, 2736fd0130Shoumkh TimeSpec, 2836fd0130Shoumkh }, 29ab5c8ca4Slogin }; 30ab5c8ca4Slogin 319e9ffedfSPlucky923 use self::user_access::{UserBufferReader, UserBufferWriter}; 324537ffb7SChiichen 3340fe15e0SLoGin pub mod user_access; 3440fe15e0SLoGin 354454d1a2Slogin #[repr(i32)] 36676b8ef6SMork #[derive(Debug, FromPrimitive, ToPrimitive, PartialEq, Eq, Clone)] 3779a452ceShoumkh #[allow(dead_code, non_camel_case_types)] 384454d1a2Slogin pub enum SystemError { 3979a452ceShoumkh EPERM = 1, 4079a452ceShoumkh /// 没有指定的文件或目录 No such file or directory. 4179a452ceShoumkh ENOENT = 2, 424454d1a2Slogin /// 没有这样的进程 No such process. 4379a452ceShoumkh ESRCH = 3, 4479a452ceShoumkh /// 被中断的函数 Interrupted function. 4579a452ceShoumkh EINTR = 4, 4679a452ceShoumkh /// I/O错误 I/O error. 4779a452ceShoumkh EIO = 5, 4879a452ceShoumkh /// 没有这样的设备或地址 No such device or address. 4979a452ceShoumkh ENXIO = 6, 5079a452ceShoumkh /// 参数列表过长,或者在输出buffer中缺少空间 或者参数比系统内建的最大值要大 Argument list too long. 5179a452ceShoumkh E2BIG = 7, 5279a452ceShoumkh /// 可执行文件格式错误 Executable file format error 5379a452ceShoumkh ENOEXEC = 8, 5479a452ceShoumkh /// 错误的文件描述符 Bad file descriptor. 5579a452ceShoumkh EBADF = 9, 5679a452ceShoumkh /// 没有子进程 No child processes. 5779a452ceShoumkh ECHILD = 10, 5879a452ceShoumkh /// 资源不可用,请重试。 Resource unavailable, try again.(may be the same value as [EWOULDBLOCK]) 5979a452ceShoumkh /// 6079a452ceShoumkh /// 操作将被禁止 Operation would block.(may be the same value as [EAGAIN]). 6179a452ceShoumkh EAGAIN_OR_EWOULDBLOCK = 11, 6279a452ceShoumkh /// 没有足够的空间 Not enough space. 6379a452ceShoumkh ENOMEM = 12, 6479a452ceShoumkh /// 访问被拒绝 Permission denied 6579a452ceShoumkh EACCES = 13, 6679a452ceShoumkh /// 错误的地址 Bad address 6779a452ceShoumkh EFAULT = 14, 6879a452ceShoumkh /// 需要块设备 Block device required 6979a452ceShoumkh ENOTBLK = 15, 7079a452ceShoumkh /// 设备或资源忙 Device or resource busy. 7179a452ceShoumkh EBUSY = 16, 7279a452ceShoumkh /// 文件已存在 File exists. 7379a452ceShoumkh EEXIST = 17, 744454d1a2Slogin /// 跨设备连接 Cross-device link. 7579a452ceShoumkh EXDEV = 18, 7679a452ceShoumkh /// 没有指定的设备 No such device. 7779a452ceShoumkh ENODEV = 19, 7879a452ceShoumkh /// 不是目录 Not a directory. 7979a452ceShoumkh ENOTDIR = 20, 8079a452ceShoumkh /// 是一个目录 Is a directory 8179a452ceShoumkh EISDIR = 21, 8279a452ceShoumkh /// 不可用的参数 Invalid argument. 8379a452ceShoumkh EINVAL = 22, 8479a452ceShoumkh /// 系统中打开的文件过多 Too many files open in system. 8579a452ceShoumkh ENFILE = 23, 8679a452ceShoumkh /// 文件描述符的值过大 File descriptor value too large. 8779a452ceShoumkh EMFILE = 24, 8879a452ceShoumkh /// 不正确的I/O控制操作 Inappropriate I/O control operation. 8979a452ceShoumkh ENOTTY = 25, 9079a452ceShoumkh /// 文本文件忙 Text file busy. 9179a452ceShoumkh ETXTBSY = 26, 9279a452ceShoumkh /// 文件太大 File too large. 9379a452ceShoumkh EFBIG = 27, 9479a452ceShoumkh /// 设备上没有空间 No space left on device. 9579a452ceShoumkh ENOSPC = 28, 9679a452ceShoumkh /// 错误的寻道.当前文件是pipe,不允许seek请求 Invalid seek. 9779a452ceShoumkh ESPIPE = 29, 9879a452ceShoumkh /// 只读的文件系统 Read-only file system. 9979a452ceShoumkh EROFS = 30, 10079a452ceShoumkh /// 链接数过多 Too many links. 10179a452ceShoumkh EMLINK = 31, 10279a452ceShoumkh /// 断开的管道 Broken pipe. 10379a452ceShoumkh EPIPE = 32, 10479a452ceShoumkh /// 数学参数超出作用域 Mathematics argument out of domain of function. 10579a452ceShoumkh EDOM = 33, 10679a452ceShoumkh /// 结果过大 Result too large. 10779a452ceShoumkh ERANGE = 34, 10879a452ceShoumkh /// 资源死锁将要发生 Resource deadlock would occur. 10979a452ceShoumkh EDEADLK = 35, 11079a452ceShoumkh /// 文件名过长 Filename too long. 11179a452ceShoumkh ENAMETOOLONG = 36, 11279a452ceShoumkh /// 没有可用的锁 No locks available. 11379a452ceShoumkh ENOLCK = 37, 11479a452ceShoumkh /// 功能不支持 Function not supported. 11579a452ceShoumkh ENOSYS = 38, 11679a452ceShoumkh /// 目录非空 Directory not empty. 11779a452ceShoumkh ENOTEMPTY = 39, 11879a452ceShoumkh /// 符号链接级别过多 Too many levels of symbolic links. 11979a452ceShoumkh ELOOP = 40, 12079a452ceShoumkh /// 没有期待类型的消息 No message of the desired type. 12179a452ceShoumkh ENOMSG = 41, 12279a452ceShoumkh /// 标志符被移除 Identifier removed. 12379a452ceShoumkh EIDRM = 42, 12479a452ceShoumkh /// 通道号超出范围 Channel number out of range 12579a452ceShoumkh ECHRNG = 43, 12679a452ceShoumkh /// 二级不同步 Level 2 not synchronized 12779a452ceShoumkh EL2NSYNC = 44, 12879a452ceShoumkh /// 三级暂停 Level 3 halted 12979a452ceShoumkh EL3HLT = 45, 13079a452ceShoumkh /// 三级重置 Level 3 reset 13179a452ceShoumkh EL3RST = 46, 13279a452ceShoumkh /// 链接号超出范围 Link number out of range 13379a452ceShoumkh ELNRNG = 47, 13479a452ceShoumkh /// 未连接协议驱动程序 Protocol driver not attached 13579a452ceShoumkh EUNATCH = 48, 13679a452ceShoumkh /// 没有可用的CSI结构 No CSI structure available 13779a452ceShoumkh ENOCSI = 49, 13879a452ceShoumkh /// 二级暂停 Level 2 halted 13979a452ceShoumkh EL2HLT = 50, 14079a452ceShoumkh /// 无效交换 Invalid exchange 14179a452ceShoumkh EBADE = 51, 14279a452ceShoumkh /// 无效的请求描述符 Invalid request descriptor 14379a452ceShoumkh EBADR = 52, 14479a452ceShoumkh /// 交换满 Exchange full 14579a452ceShoumkh EXFULL = 53, 14679a452ceShoumkh /// 无阳极 No anode 14779a452ceShoumkh ENOANO = 54, 14879a452ceShoumkh /// 请求码无效 Invalid request code 14979a452ceShoumkh EBADRQC = 55, 15079a452ceShoumkh /// 无效插槽 Invalid slot 15179a452ceShoumkh EBADSLT = 56, 15279a452ceShoumkh /// 资源死锁 Resource deadlock would occur 15379a452ceShoumkh EDEADLOCK = 57, 15479a452ceShoumkh /// 错误的字体文件格式 Bad font file format 15579a452ceShoumkh EBFONT = 58, 15679a452ceShoumkh /// 不是STREAM Not a STREAM 15779a452ceShoumkh ENOSTR = 59, 15879a452ceShoumkh /// 队列头没有可读取的消息 No message is available on the STREAM head read queue. 15979a452ceShoumkh ENODATA = 60, 16079a452ceShoumkh /// 流式ioctl()超时 Stream ioctl() timeout 16179a452ceShoumkh ETIME = 61, 16279a452ceShoumkh /// 没有STREAM资源 No STREAM resources. 16379a452ceShoumkh ENOSR = 62, 16479a452ceShoumkh /// 机器不在网络上 Machine is not on the network 16579a452ceShoumkh ENONET = 63, 16679a452ceShoumkh /// 未安装软件包 Package not installed 16779a452ceShoumkh ENOPKG = 64, 16879a452ceShoumkh /// 远程对象 Object is remote 16979a452ceShoumkh EREMOTE = 65, 17079a452ceShoumkh /// 保留 Reserved. 17179a452ceShoumkh ENOLINK = 66, 17279a452ceShoumkh /// 外设错误 Advertise error. 17379a452ceShoumkh EADV = 67, 17479a452ceShoumkh /// 安装错误 Srmount error 17579a452ceShoumkh ESRMNT = 68, 17679a452ceShoumkh /// 发送时发生通信错误 Communication error on send 17779a452ceShoumkh ECOMM = 69, 17879a452ceShoumkh /// 协议错误 Protocol error. 17979a452ceShoumkh EPROTO = 70, 18079a452ceShoumkh /// 保留使用 Reserved. 18179a452ceShoumkh EMULTIHOP = 71, 18279a452ceShoumkh /// RFS特定错误 RFS specific error 18379a452ceShoumkh EDOTDOT = 72, 18479a452ceShoumkh /// 错误的消息 Bad message. 18579a452ceShoumkh EBADMSG = 73, 18679a452ceShoumkh /// 数值过大,产生溢出 Value too large to be stored in data type. 18779a452ceShoumkh EOVERFLOW = 74, 18879a452ceShoumkh /// 名称在网络上不是唯一的 Name not unique on network 18979a452ceShoumkh ENOTUNIQ = 75, 19079a452ceShoumkh /// 处于不良状态的文件描述符 File descriptor in bad state 19179a452ceShoumkh EBADFD = 76, 19279a452ceShoumkh /// 远程地址已更改 Remote address changed 19379a452ceShoumkh EREMCHG = 77, 19479a452ceShoumkh /// 无法访问所需的共享库 Can not access a needed shared library 19579a452ceShoumkh ELIBACC = 78, 19679a452ceShoumkh /// 访问损坏的共享库 Accessing a corrupted shared library 19779a452ceShoumkh ELIBBAD = 79, 19879a452ceShoumkh /// a. out中的.lib部分已损坏 .lib section in a.out corrupted 19979a452ceShoumkh ELIBSCN = 80, 20079a452ceShoumkh /// 尝试链接太多共享库 Attempting to link in too many shared libraries 20179a452ceShoumkh ELIBMAX = 81, 20279a452ceShoumkh /// 无法直接执行共享库 Cannot exec a shared library directly 20379a452ceShoumkh ELIBEXEC = 82, 20479a452ceShoumkh /// 不合法的字符序列 Illegal byte sequence. 20579a452ceShoumkh EILSEQ = 83, 20679a452ceShoumkh /// 中断的系统调用应该重新启动 Interrupted system call should be restarted 20779a452ceShoumkh ERESTART = 84, 20879a452ceShoumkh /// 流管道错误 Streams pipe error 20979a452ceShoumkh ESTRPIPE = 85, 21079a452ceShoumkh /// 用户太多 Too many users 21179a452ceShoumkh EUSERS = 86, 21279a452ceShoumkh /// 不是一个套接字 Not a socket. 21379a452ceShoumkh ENOTSOCK = 87, 21479a452ceShoumkh /// 需要目标地址 Destination address required. 21579a452ceShoumkh EDESTADDRREQ = 88, 21679a452ceShoumkh /// 消息过大 Message too large. 21779a452ceShoumkh EMSGSIZE = 89, 21879a452ceShoumkh /// 对于套接字而言,错误的协议 Protocol wrong type for socket. 21979a452ceShoumkh EPROTOTYPE = 90, 22079a452ceShoumkh /// 协议不可用 Protocol not available. 22179a452ceShoumkh ENOPROTOOPT = 91, 22279a452ceShoumkh /// 协议不被支持 Protocol not supported. 22379a452ceShoumkh EPROTONOSUPPORT = 92, 22479a452ceShoumkh /// 不支持套接字类型 Socket type not supported 22579a452ceShoumkh ESOCKTNOSUPPORT = 93, 22679a452ceShoumkh /// 套接字不支持该操作 Operation not supported on socket (may be the same value as [ENOTSUP]). 22779a452ceShoumkh /// 22879a452ceShoumkh /// 不被支持 Not supported (may be the same value as [EOPNOTSUPP]). 22979a452ceShoumkh EOPNOTSUPP_OR_ENOTSUP = 94, 23079a452ceShoumkh /// 不支持协议系列 Protocol family not supported 23179a452ceShoumkh EPFNOSUPPORT = 95, 23279a452ceShoumkh /// 地址family不支持 Address family not supported. 23379a452ceShoumkh EAFNOSUPPORT = 96, 23479a452ceShoumkh /// 地址正在被使用 Address in use. 23579a452ceShoumkh EADDRINUSE = 97, 23679a452ceShoumkh /// 地址不可用 Address not available. 23779a452ceShoumkh EADDRNOTAVAIL = 98, 23879a452ceShoumkh /// 网络已关闭 Network is down. 23979a452ceShoumkh ENETDOWN = 99, 24079a452ceShoumkh /// 网络不可达 Network unreachable. 24179a452ceShoumkh ENETUNREACH = 100, 24279a452ceShoumkh /// 网络连接已断开 Connection aborted by network. 24379a452ceShoumkh ENETRESET = 101, 24479a452ceShoumkh /// 连接已断开 Connection aborted. 24579a452ceShoumkh ECONNABORTED = 102, 24679a452ceShoumkh /// 连接被重置 Connection reset. 24779a452ceShoumkh ECONNRESET = 103, 24879a452ceShoumkh /// 缓冲区空间不足 No buffer space available. 24979a452ceShoumkh ENOBUFS = 104, 25079a452ceShoumkh /// 套接字已连接 Socket is connected. 25179a452ceShoumkh EISCONN = 105, 25279a452ceShoumkh /// 套接字未连接 The socket is not connected. 25379a452ceShoumkh ENOTCONN = 106, 25479a452ceShoumkh /// 传输端点关闭后无法发送 Cannot send after transport endpoint shutdown 25579a452ceShoumkh ESHUTDOWN = 107, 25679a452ceShoumkh /// 引用太多:无法拼接 Too many references: cannot splice 25779a452ceShoumkh ETOOMANYREFS = 108, 25879a452ceShoumkh /// 连接超时 Connection timed out. 25979a452ceShoumkh ETIMEDOUT = 109, 26079a452ceShoumkh /// 连接被拒绝 Connection refused. 26179a452ceShoumkh ECONNREFUSED = 110, 26279a452ceShoumkh /// 主机已关闭 Host is down 26379a452ceShoumkh EHOSTDOWN = 111, 26479a452ceShoumkh /// 主机不可达 Host is unreachable. 26579a452ceShoumkh EHOSTUNREACH = 112, 26679a452ceShoumkh /// 连接已经在处理 Connection already in progress. 26779a452ceShoumkh EALREADY = 113, 26879a452ceShoumkh /// 操作正在处理 Operation in progress. 26979a452ceShoumkh EINPROGRESS = 114, 27079a452ceShoumkh /// 保留 Reserved. 27179a452ceShoumkh ESTALE = 115, 27279a452ceShoumkh /// 结构需要清理 Structure needs cleaning 27379a452ceShoumkh EUCLEAN = 116, 27479a452ceShoumkh /// 不是XENIX命名类型文件 Not a XENIX named type file 27579a452ceShoumkh ENOTNAM = 117, 27679a452ceShoumkh /// 没有可用的XENIX信号量 No XENIX semaphores available 27779a452ceShoumkh ENAVAIL = 118, 27879a452ceShoumkh /// 是命名类型文件 Is a named type file 27979a452ceShoumkh EISNAM = 119, 28079a452ceShoumkh /// 远程I/O错误 Remote I/O error 28179a452ceShoumkh EREMOTEIO = 120, 28279a452ceShoumkh /// 保留使用 Reserved 28379a452ceShoumkh EDQUOT = 121, 28479a452ceShoumkh /// 没有找到媒介 No medium found 28579a452ceShoumkh ENOMEDIUM = 122, 28679a452ceShoumkh /// 介质类型错误 Wrong medium type 28779a452ceShoumkh EMEDIUMTYPE = 123, 28879a452ceShoumkh /// 操作被取消 Operation canceled. 28979a452ceShoumkh ECANCELED = 124, 29079a452ceShoumkh /// 所需的密钥不可用 Required key not available 29179a452ceShoumkh ENOKEY = 125, 29279a452ceShoumkh /// 密钥已过期 Key has expired 29379a452ceShoumkh EKEYEXPIRED = 126, 29479a452ceShoumkh /// 密钥已被撤销 Key has been revoked 29579a452ceShoumkh EKEYREVOKED = 127, 29679a452ceShoumkh /// 密钥被服务拒绝 Key has been revoked 29779a452ceShoumkh EKEYREJECTED = 128, 29879a452ceShoumkh /// 之前的拥有者挂了 Previous owner died. 29979a452ceShoumkh EOWNERDEAD = 129, 30079a452ceShoumkh /// 状态不可恢复 State not recoverable. 30179a452ceShoumkh ENOTRECOVERABLE = 130, 30240314b30SXiaoye Zheng // VMX on 虚拟化开启指令出错 30340314b30SXiaoye Zheng EVMXONFailed = 131, 30440314b30SXiaoye Zheng // VMX off 虚拟化关闭指令出错 30540314b30SXiaoye Zheng EVMXOFFFailed = 132, 30640314b30SXiaoye Zheng // VMX VMWRITE 写入虚拟化VMCS内存出错 30740314b30SXiaoye Zheng EVMWRITEFailed = 133, 30840314b30SXiaoye Zheng EVMREADFailed = 134, 30940314b30SXiaoye Zheng EVMPRTLDFailed = 135, 31040314b30SXiaoye Zheng EVMLAUNCHFailed = 136, 31140314b30SXiaoye Zheng KVM_HVA_ERR_BAD = 137, 3124454d1a2Slogin } 313676b8ef6SMork 314676b8ef6SMork impl SystemError { 315676b8ef6SMork /// @brief 把posix错误码转换为系统错误枚举类型。 316676b8ef6SMork pub fn from_posix_errno(errno: i32) -> Option<SystemError> { 317676b8ef6SMork // posix 错误码是小于0的 318676b8ef6SMork if errno >= 0 { 319676b8ef6SMork return None; 320676b8ef6SMork } 321676b8ef6SMork return <Self as FromPrimitive>::from_i32(-errno); 322676b8ef6SMork } 323676b8ef6SMork 324676b8ef6SMork /// @brief 把系统错误枚举类型转换为负数posix错误码。 325676b8ef6SMork pub fn to_posix_errno(&self) -> i32 { 326676b8ef6SMork return -<Self as ToPrimitive>::to_i32(self).unwrap(); 327676b8ef6SMork } 328676b8ef6SMork } 329ab5c8ca4Slogin 330ab5c8ca4Slogin // 定义系统调用号 331*ad1d649eSGnoCiYeH pub const SYS_READ: usize = 0; 332*ad1d649eSGnoCiYeH pub const SYS_WRITE: usize = 1; 333ab5c8ca4Slogin pub const SYS_OPEN: usize = 2; 334ab5c8ca4Slogin pub const SYS_CLOSE: usize = 3; 335*ad1d649eSGnoCiYeH #[allow(dead_code)] 336*ad1d649eSGnoCiYeH pub const SYS_STAT: usize = 4; 337*ad1d649eSGnoCiYeH pub const SYS_FSTAT: usize = 5; 338ab5c8ca4Slogin 339*ad1d649eSGnoCiYeH #[allow(dead_code)] 340*ad1d649eSGnoCiYeH pub const SYS_POLL: usize = 7; 341*ad1d649eSGnoCiYeH pub const SYS_LSEEK: usize = 8; 342*ad1d649eSGnoCiYeH pub const SYS_MMAP: usize = 9; 343*ad1d649eSGnoCiYeH pub const SYS_MPROTECT: usize = 10; 344*ad1d649eSGnoCiYeH pub const SYS_MUNMAP: usize = 11; 345*ad1d649eSGnoCiYeH pub const SYS_BRK: usize = 12; 346*ad1d649eSGnoCiYeH pub const SYS_SIGACTION: usize = 13; 347*ad1d649eSGnoCiYeH #[allow(dead_code)] 348*ad1d649eSGnoCiYeH pub const SYS_RT_SIGPROCMASK: usize = 14; 349*ad1d649eSGnoCiYeH 350*ad1d649eSGnoCiYeH pub const SYS_RT_SIGRETURN: usize = 15; 351*ad1d649eSGnoCiYeH pub const SYS_IOCTL: usize = 16; 352*ad1d649eSGnoCiYeH 353*ad1d649eSGnoCiYeH #[allow(dead_code)] 354*ad1d649eSGnoCiYeH pub const SYS_WRITEV: usize = 20; 355*ad1d649eSGnoCiYeH 356*ad1d649eSGnoCiYeH pub const SYS_DUP: usize = 32; 357*ad1d649eSGnoCiYeH pub const SYS_DUP2: usize = 33; 358*ad1d649eSGnoCiYeH 359*ad1d649eSGnoCiYeH pub const SYS_NANOSLEEP: usize = 35; 360*ad1d649eSGnoCiYeH 361*ad1d649eSGnoCiYeH pub const SYS_GETPID: usize = 39; 362*ad1d649eSGnoCiYeH 363*ad1d649eSGnoCiYeH pub const SYS_SOCKET: usize = 41; 364*ad1d649eSGnoCiYeH pub const SYS_CONNECT: usize = 42; 365*ad1d649eSGnoCiYeH pub const SYS_ACCEPT: usize = 43; 366*ad1d649eSGnoCiYeH pub const SYS_SENDTO: usize = 44; 367*ad1d649eSGnoCiYeH pub const SYS_RECVFROM: usize = 45; 368*ad1d649eSGnoCiYeH 369*ad1d649eSGnoCiYeH pub const SYS_RECVMSG: usize = 47; 370*ad1d649eSGnoCiYeH pub const SYS_SHUTDOWN: usize = 48; 371*ad1d649eSGnoCiYeH pub const SYS_BIND: usize = 49; 372*ad1d649eSGnoCiYeH pub const SYS_LISTEN: usize = 50; 373*ad1d649eSGnoCiYeH pub const SYS_GETSOCKNAME: usize = 51; 374*ad1d649eSGnoCiYeH pub const SYS_GETPEERNAME: usize = 52; 375*ad1d649eSGnoCiYeH 376*ad1d649eSGnoCiYeH pub const SYS_SETSOCKOPT: usize = 54; 377*ad1d649eSGnoCiYeH pub const SYS_GETSOCKOPT: usize = 55; 378*ad1d649eSGnoCiYeH 379*ad1d649eSGnoCiYeH #[allow(dead_code)] 380*ad1d649eSGnoCiYeH pub const SYS_CLONE: usize = 56; 381*ad1d649eSGnoCiYeH pub const SYS_FORK: usize = 57; 382*ad1d649eSGnoCiYeH pub const SYS_VFORK: usize = 58; 383*ad1d649eSGnoCiYeH pub const SYS_EXECVE: usize = 59; 384*ad1d649eSGnoCiYeH pub const SYS_EXIT: usize = 60; 385*ad1d649eSGnoCiYeH pub const SYS_WAIT4: usize = 61; 386*ad1d649eSGnoCiYeH pub const SYS_KILL: usize = 62; 387*ad1d649eSGnoCiYeH 388*ad1d649eSGnoCiYeH pub const SYS_FCNTL: usize = 72; 389*ad1d649eSGnoCiYeH 390*ad1d649eSGnoCiYeH pub const SYS_FTRUNCATE: usize = 77; 391*ad1d649eSGnoCiYeH pub const SYS_GET_DENTS: usize = 78; 392*ad1d649eSGnoCiYeH 393*ad1d649eSGnoCiYeH pub const SYS_GETCWD: usize = 79; 394*ad1d649eSGnoCiYeH 395*ad1d649eSGnoCiYeH pub const SYS_CHDIR: usize = 80; 396*ad1d649eSGnoCiYeH 397*ad1d649eSGnoCiYeH pub const SYS_MKDIR: usize = 83; 398*ad1d649eSGnoCiYeH 399*ad1d649eSGnoCiYeH pub const SYS_GETTIMEOFDAY: usize = 96; 400*ad1d649eSGnoCiYeH 401*ad1d649eSGnoCiYeH #[allow(dead_code)] 402*ad1d649eSGnoCiYeH pub const SYS_SIGALTSTACK: usize = 131; 403*ad1d649eSGnoCiYeH 404*ad1d649eSGnoCiYeH #[allow(dead_code)] 405*ad1d649eSGnoCiYeH pub const SYS_ARCH_PRCTL: usize = 158; 406*ad1d649eSGnoCiYeH 407*ad1d649eSGnoCiYeH pub const SYS_REBOOT: usize = 169; 408*ad1d649eSGnoCiYeH 409*ad1d649eSGnoCiYeH pub const SYS_GETPPID: usize = 110; 410*ad1d649eSGnoCiYeH pub const SYS_GETPGID: usize = 121; 411*ad1d649eSGnoCiYeH 412*ad1d649eSGnoCiYeH pub const SYS_MKNOD: usize = 133; 413*ad1d649eSGnoCiYeH 414*ad1d649eSGnoCiYeH #[allow(dead_code)] 415*ad1d649eSGnoCiYeH pub const SYS_TKILL: usize = 200; 416*ad1d649eSGnoCiYeH 417*ad1d649eSGnoCiYeH #[allow(dead_code)] 418*ad1d649eSGnoCiYeH pub const SYS_FUTEX: usize = 202; 419*ad1d649eSGnoCiYeH 420*ad1d649eSGnoCiYeH pub const SYS_GET_DENTS_64: usize = 217; 421*ad1d649eSGnoCiYeH #[allow(dead_code)] 422*ad1d649eSGnoCiYeH pub const SYS_SET_TID_ADDR: usize = 218; 423*ad1d649eSGnoCiYeH 424*ad1d649eSGnoCiYeH pub const SYS_UNLINK_AT: usize = 263; 425*ad1d649eSGnoCiYeH 426*ad1d649eSGnoCiYeH pub const SYS_PIPE: usize = 293; 427*ad1d649eSGnoCiYeH 428*ad1d649eSGnoCiYeH #[allow(dead_code)] 429*ad1d649eSGnoCiYeH pub const SYS_GET_RANDOM: usize = 318; 430*ad1d649eSGnoCiYeH 431*ad1d649eSGnoCiYeH // 与linux不一致的调用,在linux基础上累加 432*ad1d649eSGnoCiYeH pub const SYS_PUT_STRING: usize = 100000; 433*ad1d649eSGnoCiYeH pub const SYS_SBRK: usize = 100001; 434ab5c8ca4Slogin /// todo: 该系统调用与Linux不一致,将来需要删除该系统调用!!! 删的时候记得改C版本的libc 435*ad1d649eSGnoCiYeH pub const SYS_CLOCK: usize = 100002; 436*ad1d649eSGnoCiYeH pub const SYS_SCHED: usize = 100003; 43740314b30SXiaoye Zheng 438ab5c8ca4Slogin #[derive(Debug)] 439ab5c8ca4Slogin pub struct Syscall; 440ab5c8ca4Slogin 441ab5c8ca4Slogin extern "C" { 442ab5c8ca4Slogin fn do_put_string(s: *const u8, front_color: u32, back_color: u32) -> usize; 443ab5c8ca4Slogin } 444ab5c8ca4Slogin 445ab5c8ca4Slogin #[no_mangle] 446ab5c8ca4Slogin pub extern "C" fn syscall_init() -> i32 { 447ab5c8ca4Slogin kinfo!("Initializing syscall..."); 448ab5c8ca4Slogin Syscall::init().expect("syscall init failed"); 449ab5c8ca4Slogin kinfo!("Syscall init successfully!"); 450ab5c8ca4Slogin return 0; 451ab5c8ca4Slogin } 452ab5c8ca4Slogin 453ab5c8ca4Slogin impl Syscall { 454ab5c8ca4Slogin /// 初始化系统调用 455ab5c8ca4Slogin pub fn init() -> Result<(), SystemError> { 456ab5c8ca4Slogin static INIT_FLAG: AtomicBool = AtomicBool::new(false); 457ab5c8ca4Slogin let prev = INIT_FLAG.swap(true, Ordering::SeqCst); 458ab5c8ca4Slogin if prev { 459ab5c8ca4Slogin panic!("Cannot initialize syscall more than once!"); 460ab5c8ca4Slogin } 461ab5c8ca4Slogin return crate::arch::syscall::arch_syscall_init(); 462ab5c8ca4Slogin } 463ab5c8ca4Slogin /// @brief 系统调用分发器,用于分发系统调用。 464ab5c8ca4Slogin /// 465ab5c8ca4Slogin /// 这个函数内,需要根据系统调用号,调用对应的系统调用处理函数。 466ab5c8ca4Slogin /// 并且,对于用户态传入的指针参数,需要在本函数内进行越界检查,防止访问到内核空间。 4679e9ffedfSPlucky923 pub fn handle( 4689e9ffedfSPlucky923 syscall_num: usize, 4699e9ffedfSPlucky923 args: &[usize], 4709e9ffedfSPlucky923 frame: &mut TrapFrame, 4719e9ffedfSPlucky923 ) -> Result<usize, SystemError> { 472ab5c8ca4Slogin let r = match syscall_num { 473ab5c8ca4Slogin SYS_PUT_STRING => { 474ab5c8ca4Slogin Self::put_string(args[0] as *const u8, args[1] as u32, args[2] as u32) 475ab5c8ca4Slogin } 476ab5c8ca4Slogin SYS_OPEN => { 477ab5c8ca4Slogin let path: &CStr = unsafe { CStr::from_ptr(args[0] as *const c_char) }; 478ab5c8ca4Slogin let path: Result<&str, core::str::Utf8Error> = path.to_str(); 479ab5c8ca4Slogin let res = if path.is_err() { 480ab5c8ca4Slogin Err(SystemError::EINVAL) 481ab5c8ca4Slogin } else { 482ab5c8ca4Slogin let path: &str = path.unwrap(); 48334e6d6c8Syuyi2439 484ab5c8ca4Slogin let flags = args[1]; 485ab5c8ca4Slogin let open_flags: FileMode = FileMode::from_bits_truncate(flags as u32); 486ab5c8ca4Slogin Self::open(path, open_flags) 487ab5c8ca4Slogin }; 4886d81180bSLoGin 489ab5c8ca4Slogin res 490ab5c8ca4Slogin } 491ab5c8ca4Slogin SYS_CLOSE => { 492ab5c8ca4Slogin let fd = args[0]; 49334e6d6c8Syuyi2439 49434e6d6c8Syuyi2439 let res = Self::close(fd); 49534e6d6c8Syuyi2439 49634e6d6c8Syuyi2439 res 497ab5c8ca4Slogin } 498ab5c8ca4Slogin SYS_READ => { 499ab5c8ca4Slogin let fd = args[0] as i32; 500ab5c8ca4Slogin let buf_vaddr = args[1]; 501ab5c8ca4Slogin let len = args[2]; 5029e9ffedfSPlucky923 let from_user = frame.from_user(); 5039e9ffedfSPlucky923 let mut user_buffer_writer = 5049e9ffedfSPlucky923 UserBufferWriter::new(buf_vaddr as *mut u8, len, from_user)?; 5056d81180bSLoGin 5069e9ffedfSPlucky923 let user_buf = user_buffer_writer.buffer(0)?; 5079e9ffedfSPlucky923 let res = Self::read(fd, user_buf); 508ab5c8ca4Slogin res 509ab5c8ca4Slogin } 510ab5c8ca4Slogin SYS_WRITE => { 511ab5c8ca4Slogin let fd = args[0] as i32; 512ab5c8ca4Slogin let buf_vaddr = args[1]; 513ab5c8ca4Slogin let len = args[2]; 5149e9ffedfSPlucky923 let from_user = frame.from_user(); 5159e9ffedfSPlucky923 let user_buffer_reader = 5169e9ffedfSPlucky923 UserBufferReader::new(buf_vaddr as *const u8, len, from_user)?; 5176d81180bSLoGin 5189e9ffedfSPlucky923 let user_buf = user_buffer_reader.read_from_user(0)?; 5199e9ffedfSPlucky923 let res = Self::write(fd, user_buf); 520ab5c8ca4Slogin res 521ab5c8ca4Slogin } 522ab5c8ca4Slogin 523ab5c8ca4Slogin SYS_LSEEK => { 524ab5c8ca4Slogin let fd = args[0] as i32; 525ab5c8ca4Slogin let offset = args[1] as i64; 526ab5c8ca4Slogin let whence = args[2] as u32; 527ab5c8ca4Slogin 528ab5c8ca4Slogin let w = match whence { 529ab5c8ca4Slogin SEEK_SET => Ok(SeekFrom::SeekSet(offset)), 530ab5c8ca4Slogin SEEK_CUR => Ok(SeekFrom::SeekCurrent(offset)), 531ab5c8ca4Slogin SEEK_END => Ok(SeekFrom::SeekEnd(offset)), 532ab5c8ca4Slogin SEEK_MAX => Ok(SeekFrom::SeekEnd(0)), 533ab5c8ca4Slogin _ => Err(SystemError::EINVAL), 5349e9ffedfSPlucky923 }?; 535ab5c8ca4Slogin 536ab5c8ca4Slogin Self::lseek(fd, w) 537ab5c8ca4Slogin } 53840314b30SXiaoye Zheng SYS_IOCTL => { 53940314b30SXiaoye Zheng kdebug!("SYS_IOCTL"); 54040314b30SXiaoye Zheng let fd = args[0]; 54140314b30SXiaoye Zheng let cmd = args[1]; 54240314b30SXiaoye Zheng let data = args[2]; 54340314b30SXiaoye Zheng Self::ioctl(fd, cmd as u32, data) 54440314b30SXiaoye Zheng } 545ab5c8ca4Slogin 5461496ba7bSLoGin SYS_FORK => Self::fork(frame), 5471496ba7bSLoGin SYS_VFORK => Self::vfork(frame), 5481496ba7bSLoGin 549ab5c8ca4Slogin SYS_BRK => { 55040fe15e0SLoGin let new_brk = VirtAddr::new(args[0]); 55140fe15e0SLoGin Self::brk(new_brk).map(|vaddr| vaddr.data()) 552ab5c8ca4Slogin } 553ab5c8ca4Slogin 554ab5c8ca4Slogin SYS_SBRK => { 555ab5c8ca4Slogin let increment = args[0] as isize; 5561496ba7bSLoGin Self::sbrk(increment).map(|vaddr: VirtAddr| vaddr.data()) 557ab5c8ca4Slogin } 558ab5c8ca4Slogin 559ab5c8ca4Slogin SYS_REBOOT => Self::reboot(), 560ab5c8ca4Slogin 561ab5c8ca4Slogin SYS_CHDIR => { 562ab5c8ca4Slogin // Closure for checking arguments 563ab5c8ca4Slogin let chdir_check = |arg0: usize| { 564ab5c8ca4Slogin if arg0 == 0 { 565ab5c8ca4Slogin return Err(SystemError::EFAULT); 566ab5c8ca4Slogin } 567ab5c8ca4Slogin let path_ptr = arg0 as *const c_char; 568be63f3b2Shoumkh let virt_addr = VirtAddr::new(path_ptr as usize); 569ab5c8ca4Slogin // 权限校验 570ab5c8ca4Slogin if path_ptr.is_null() 5711496ba7bSLoGin || (frame.from_user() 5721496ba7bSLoGin && verify_area(virt_addr, PAGE_2M_SIZE as usize).is_err()) 573ab5c8ca4Slogin { 574ab5c8ca4Slogin return Err(SystemError::EINVAL); 575ab5c8ca4Slogin } 576ab5c8ca4Slogin let dest_path: &CStr = unsafe { CStr::from_ptr(path_ptr) }; 577ab5c8ca4Slogin let dest_path: &str = dest_path.to_str().map_err(|_| SystemError::EINVAL)?; 578ab5c8ca4Slogin if dest_path.len() == 0 { 579ab5c8ca4Slogin return Err(SystemError::EINVAL); 5801496ba7bSLoGin } else if dest_path.len() > MAX_PATHLEN as usize { 581ab5c8ca4Slogin return Err(SystemError::ENAMETOOLONG); 582ab5c8ca4Slogin } 583ab5c8ca4Slogin 584ab5c8ca4Slogin return Ok(dest_path); 585ab5c8ca4Slogin }; 586ab5c8ca4Slogin 5879e9ffedfSPlucky923 let r = chdir_check(args[0])?; 5889e9ffedfSPlucky923 Self::chdir(r) 589ab5c8ca4Slogin } 590ab5c8ca4Slogin 591*ad1d649eSGnoCiYeH SYS_GET_DENTS | SYS_GET_DENTS_64 => { 592ab5c8ca4Slogin let fd = args[0] as i32; 59334e6d6c8Syuyi2439 594ab5c8ca4Slogin let buf_vaddr = args[1]; 595ab5c8ca4Slogin let len = args[2]; 596f5df0e79SLoGin let virt_addr: VirtAddr = VirtAddr::new(buf_vaddr); 597ab5c8ca4Slogin // 判断缓冲区是否来自用户态,进行权限校验 5981496ba7bSLoGin let res = if frame.from_user() && verify_area(virt_addr, len as usize).is_err() { 599ab5c8ca4Slogin // 来自用户态,而buffer在内核态,这样的操作不被允许 600ab5c8ca4Slogin Err(SystemError::EPERM) 601ab5c8ca4Slogin } else if buf_vaddr == 0 { 602ab5c8ca4Slogin Err(SystemError::EFAULT) 603ab5c8ca4Slogin } else { 604ab5c8ca4Slogin let buf: &mut [u8] = unsafe { 605ab5c8ca4Slogin core::slice::from_raw_parts_mut::<'static, u8>(buf_vaddr as *mut u8, len) 606ab5c8ca4Slogin }; 607ab5c8ca4Slogin Self::getdents(fd, buf) 608ab5c8ca4Slogin }; 609ab5c8ca4Slogin 610ab5c8ca4Slogin res 611ab5c8ca4Slogin } 612ab5c8ca4Slogin 613ab5c8ca4Slogin SYS_EXECVE => { 614ab5c8ca4Slogin let path_ptr = args[0]; 615ab5c8ca4Slogin let argv_ptr = args[1]; 616ab5c8ca4Slogin let env_ptr = args[2]; 617be63f3b2Shoumkh let virt_path_ptr = VirtAddr::new(path_ptr); 618be63f3b2Shoumkh let virt_argv_ptr = VirtAddr::new(argv_ptr); 619be63f3b2Shoumkh let virt_env_ptr = VirtAddr::new(env_ptr); 620ab5c8ca4Slogin // 权限校验 6211496ba7bSLoGin if frame.from_user() 6221496ba7bSLoGin && (verify_area(virt_path_ptr, MAX_PATHLEN as usize).is_err() 623be63f3b2Shoumkh || verify_area(virt_argv_ptr, PAGE_4K_SIZE as usize).is_err()) 624be63f3b2Shoumkh || verify_area(virt_env_ptr, PAGE_4K_SIZE as usize).is_err() 625ab5c8ca4Slogin { 626ab5c8ca4Slogin Err(SystemError::EFAULT) 627ab5c8ca4Slogin } else { 628ab5c8ca4Slogin Self::execve( 6291496ba7bSLoGin path_ptr as *const u8, 6301496ba7bSLoGin argv_ptr as *const *const u8, 6311496ba7bSLoGin env_ptr as *const *const u8, 6321496ba7bSLoGin frame, 633ab5c8ca4Slogin ) 6341496ba7bSLoGin .map(|_| 0) 635ab5c8ca4Slogin } 636ab5c8ca4Slogin } 637ab5c8ca4Slogin SYS_WAIT4 => { 6381496ba7bSLoGin let pid = args[0] as i64; 6391496ba7bSLoGin let wstatus = args[1] as *mut i32; 640ab5c8ca4Slogin let options = args[2] as c_int; 641ab5c8ca4Slogin let rusage = args[3] as *mut c_void; 642ab5c8ca4Slogin // 权限校验 643ab5c8ca4Slogin // todo: 引入rusage之后,更正以下权限校验代码中,rusage的大小 644ab5c8ca4Slogin Self::wait4(pid, wstatus, options, rusage) 645ab5c8ca4Slogin } 646ab5c8ca4Slogin 647ab5c8ca4Slogin SYS_EXIT => { 648ab5c8ca4Slogin let exit_code = args[0]; 649ab5c8ca4Slogin Self::exit(exit_code) 650ab5c8ca4Slogin } 651ab5c8ca4Slogin SYS_MKDIR => { 652ab5c8ca4Slogin let path_ptr = args[0] as *const c_char; 653ab5c8ca4Slogin let mode = args[1]; 654be63f3b2Shoumkh let virt_path_ptr = VirtAddr::new(path_ptr as usize); 655ab5c8ca4Slogin let security_check = || { 656ab5c8ca4Slogin if path_ptr.is_null() 6571496ba7bSLoGin || (frame.from_user() 6581496ba7bSLoGin && verify_area(virt_path_ptr, PAGE_2M_SIZE as usize).is_err()) 659ab5c8ca4Slogin { 660ab5c8ca4Slogin return Err(SystemError::EINVAL); 661ab5c8ca4Slogin } 662ab5c8ca4Slogin let path: &CStr = unsafe { CStr::from_ptr(path_ptr) }; 663ab5c8ca4Slogin let path: &str = path.to_str().map_err(|_| SystemError::EINVAL)?.trim(); 664ab5c8ca4Slogin 665ab5c8ca4Slogin if path == "" { 666ab5c8ca4Slogin return Err(SystemError::EINVAL); 667ab5c8ca4Slogin } 668ab5c8ca4Slogin return Ok(path); 669ab5c8ca4Slogin }; 670ab5c8ca4Slogin 671ab5c8ca4Slogin let path = security_check(); 672ab5c8ca4Slogin if path.is_err() { 673ab5c8ca4Slogin Err(path.unwrap_err()) 674ab5c8ca4Slogin } else { 675ab5c8ca4Slogin Self::mkdir(path.unwrap(), mode) 676ab5c8ca4Slogin } 677ab5c8ca4Slogin } 678ab5c8ca4Slogin 679ab5c8ca4Slogin SYS_NANOSLEEP => { 680ab5c8ca4Slogin let req = args[0] as *const TimeSpec; 681ab5c8ca4Slogin let rem = args[1] as *mut TimeSpec; 682be63f3b2Shoumkh let virt_req = VirtAddr::new(req as usize); 683be63f3b2Shoumkh let virt_rem = VirtAddr::new(rem as usize); 6841496ba7bSLoGin if frame.from_user() 685be63f3b2Shoumkh && (verify_area(virt_req, core::mem::size_of::<TimeSpec>() as usize).is_err() 686be63f3b2Shoumkh || verify_area(virt_rem, core::mem::size_of::<TimeSpec>() as usize) 687be63f3b2Shoumkh .is_err()) 688ab5c8ca4Slogin { 689ab5c8ca4Slogin Err(SystemError::EFAULT) 690ab5c8ca4Slogin } else { 691ab5c8ca4Slogin Self::nanosleep(req, rem) 692ab5c8ca4Slogin } 693ab5c8ca4Slogin } 694ab5c8ca4Slogin 695ab5c8ca4Slogin SYS_CLOCK => Self::clock(), 696ab5c8ca4Slogin SYS_PIPE => { 69722c9db31Shanjiezhou let pipefd: *mut i32 = args[0] as *mut c_int; 69822c9db31Shanjiezhou let arg1 = args[1]; 69922c9db31Shanjiezhou if pipefd.is_null() { 70022c9db31Shanjiezhou Err(SystemError::EFAULT) 70122c9db31Shanjiezhou } else { 70222c9db31Shanjiezhou let flags = FileMode::from_bits_truncate(arg1 as u32); 70322c9db31Shanjiezhou Self::pipe2(pipefd, flags) 704ab5c8ca4Slogin } 705ab5c8ca4Slogin } 706ab5c8ca4Slogin 707ab5c8ca4Slogin SYS_UNLINK_AT => { 708ab5c8ca4Slogin let dirfd = args[0] as i32; 709ab5c8ca4Slogin let pathname = args[1] as *const c_char; 710ab5c8ca4Slogin let flags = args[2] as u32; 711be63f3b2Shoumkh let virt_pathname = VirtAddr::new(pathname as usize); 7121496ba7bSLoGin if frame.from_user() && verify_area(virt_pathname, PAGE_4K_SIZE as usize).is_err() { 713ab5c8ca4Slogin Err(SystemError::EFAULT) 714ab5c8ca4Slogin } else if pathname.is_null() { 715ab5c8ca4Slogin Err(SystemError::EFAULT) 716ab5c8ca4Slogin } else { 717ab5c8ca4Slogin let get_path = || { 718ab5c8ca4Slogin let pathname: &CStr = unsafe { CStr::from_ptr(pathname) }; 719ab5c8ca4Slogin 720ab5c8ca4Slogin let pathname: &str = pathname.to_str().map_err(|_| SystemError::EINVAL)?; 721ab5c8ca4Slogin if pathname.len() >= MAX_PATHLEN { 722ab5c8ca4Slogin return Err(SystemError::ENAMETOOLONG); 723ab5c8ca4Slogin } 724ab5c8ca4Slogin return Ok(pathname.trim()); 725ab5c8ca4Slogin }; 726ab5c8ca4Slogin let pathname = get_path(); 727ab5c8ca4Slogin if pathname.is_err() { 728ab5c8ca4Slogin Err(pathname.unwrap_err()) 729ab5c8ca4Slogin } else { 7306d81180bSLoGin // kdebug!("sys unlinkat: dirfd: {}, pathname: {}", dirfd, pathname.as_ref().unwrap()); 731ab5c8ca4Slogin Self::unlinkat(dirfd, pathname.unwrap(), flags) 732ab5c8ca4Slogin } 733ab5c8ca4Slogin } 734ab5c8ca4Slogin } 735ab5c8ca4Slogin SYS_KILL => { 7361496ba7bSLoGin let pid = Pid::new(args[0]); 737ab5c8ca4Slogin let sig = args[1] as c_int; 7383c82aa56SChiichen // kdebug!("KILL SYSCALL RECEIVED"); 739ab5c8ca4Slogin Self::kill(pid, sig) 740ab5c8ca4Slogin } 741ab5c8ca4Slogin 742ab5c8ca4Slogin SYS_SIGACTION => { 743ab5c8ca4Slogin let sig = args[0] as c_int; 744ab5c8ca4Slogin let act = args[1]; 745ab5c8ca4Slogin let old_act = args[2]; 7461496ba7bSLoGin Self::sigaction(sig, act, old_act, frame.from_user()) 747ab5c8ca4Slogin } 748ab5c8ca4Slogin 749ab5c8ca4Slogin SYS_RT_SIGRETURN => { 750ab5c8ca4Slogin // 由于目前signal机制的实现,与x86_64强关联,因此暂时在arch/x86_64/syscall.rs中调用 751ab5c8ca4Slogin // todo: 未来需要将signal机制与平台解耦 752ab5c8ca4Slogin todo!() 753ab5c8ca4Slogin } 754ab5c8ca4Slogin 7551496ba7bSLoGin SYS_GETPID => Self::getpid().map(|pid| pid.into()), 756ab5c8ca4Slogin 7571496ba7bSLoGin SYS_SCHED => Self::sched(frame.from_user()), 758ab5c8ca4Slogin SYS_DUP => { 759ab5c8ca4Slogin let oldfd: i32 = args[0] as c_int; 760ab5c8ca4Slogin Self::dup(oldfd) 761ab5c8ca4Slogin } 762ab5c8ca4Slogin SYS_DUP2 => { 763ab5c8ca4Slogin let oldfd: i32 = args[0] as c_int; 764ab5c8ca4Slogin let newfd: i32 = args[1] as c_int; 765ab5c8ca4Slogin Self::dup2(oldfd, newfd) 766ab5c8ca4Slogin } 767ab5c8ca4Slogin 768ab5c8ca4Slogin SYS_SOCKET => Self::socket(args[0], args[1], args[2]), 769ab5c8ca4Slogin SYS_SETSOCKOPT => { 770ab5c8ca4Slogin let optval = args[3] as *const u8; 771ab5c8ca4Slogin let optlen = args[4] as usize; 772be63f3b2Shoumkh let virt_optval = VirtAddr::new(optval as usize); 773ab5c8ca4Slogin // 验证optval的地址是否合法 774be63f3b2Shoumkh if verify_area(virt_optval, optlen as usize).is_err() { 775ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 776ab5c8ca4Slogin Err(SystemError::EFAULT) 777ab5c8ca4Slogin } else { 778ab5c8ca4Slogin let data: &[u8] = unsafe { core::slice::from_raw_parts(optval, optlen) }; 779ab5c8ca4Slogin Self::setsockopt(args[0], args[1], args[2], data) 780ab5c8ca4Slogin } 781ab5c8ca4Slogin } 782ab5c8ca4Slogin SYS_GETSOCKOPT => { 783ab5c8ca4Slogin let optval = args[3] as *mut u8; 784ab5c8ca4Slogin let optlen = args[4] as *mut usize; 785be63f3b2Shoumkh let virt_optval = VirtAddr::new(optval as usize); 786be63f3b2Shoumkh let virt_optlen = VirtAddr::new(optlen as usize); 787ab5c8ca4Slogin let security_check = || { 788ab5c8ca4Slogin // 验证optval的地址是否合法 789be63f3b2Shoumkh if verify_area(virt_optval, PAGE_4K_SIZE as usize).is_err() { 790ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 791ab5c8ca4Slogin return Err(SystemError::EFAULT); 792ab5c8ca4Slogin } 793ab5c8ca4Slogin 794ab5c8ca4Slogin // 验证optlen的地址是否合法 795be63f3b2Shoumkh if verify_area(virt_optlen, core::mem::size_of::<u32>() as usize).is_err() { 796ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 797ab5c8ca4Slogin return Err(SystemError::EFAULT); 798ab5c8ca4Slogin } 799ab5c8ca4Slogin return Ok(()); 800ab5c8ca4Slogin }; 801ab5c8ca4Slogin let r = security_check(); 802ab5c8ca4Slogin if r.is_err() { 803ab5c8ca4Slogin Err(r.unwrap_err()) 804ab5c8ca4Slogin } else { 805ab5c8ca4Slogin Self::getsockopt(args[0], args[1], args[2], optval, optlen as *mut u32) 806ab5c8ca4Slogin } 807ab5c8ca4Slogin } 808ab5c8ca4Slogin 809ab5c8ca4Slogin SYS_CONNECT => { 810ab5c8ca4Slogin let addr = args[1] as *const SockAddr; 811ab5c8ca4Slogin let addrlen = args[2] as usize; 812be63f3b2Shoumkh let virt_addr = VirtAddr::new(addr as usize); 813ab5c8ca4Slogin // 验证addr的地址是否合法 814be63f3b2Shoumkh if verify_area(virt_addr, addrlen as usize).is_err() { 815ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 816ab5c8ca4Slogin Err(SystemError::EFAULT) 817ab5c8ca4Slogin } else { 818ab5c8ca4Slogin Self::connect(args[0], addr, addrlen) 819ab5c8ca4Slogin } 820ab5c8ca4Slogin } 821ab5c8ca4Slogin SYS_BIND => { 822ab5c8ca4Slogin let addr = args[1] as *const SockAddr; 823ab5c8ca4Slogin let addrlen = args[2] as usize; 824be63f3b2Shoumkh let virt_addr = VirtAddr::new(addr as usize); 825ab5c8ca4Slogin // 验证addr的地址是否合法 826be63f3b2Shoumkh if verify_area(virt_addr, addrlen as usize).is_err() { 827ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 828ab5c8ca4Slogin Err(SystemError::EFAULT) 829ab5c8ca4Slogin } else { 830ab5c8ca4Slogin Self::bind(args[0], addr, addrlen) 831ab5c8ca4Slogin } 832ab5c8ca4Slogin } 833ab5c8ca4Slogin 834ab5c8ca4Slogin SYS_SENDTO => { 835ab5c8ca4Slogin let buf = args[1] as *const u8; 836ab5c8ca4Slogin let len = args[2] as usize; 837ab5c8ca4Slogin let flags = args[3] as u32; 838ab5c8ca4Slogin let addr = args[4] as *const SockAddr; 839ab5c8ca4Slogin let addrlen = args[5] as usize; 840be63f3b2Shoumkh let virt_buf = VirtAddr::new(buf as usize); 841be63f3b2Shoumkh let virt_addr = VirtAddr::new(addr as usize); 842ab5c8ca4Slogin // 验证buf的地址是否合法 843be63f3b2Shoumkh if verify_area(virt_buf, len as usize).is_err() { 844ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 845ab5c8ca4Slogin Err(SystemError::EFAULT) 846be63f3b2Shoumkh } else if verify_area(virt_addr, addrlen as usize).is_err() { 847ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 848ab5c8ca4Slogin Err(SystemError::EFAULT) 849ab5c8ca4Slogin } else { 850ab5c8ca4Slogin let data: &[u8] = unsafe { core::slice::from_raw_parts(buf, len) }; 851ab5c8ca4Slogin Self::sendto(args[0], data, flags, addr, addrlen) 852ab5c8ca4Slogin } 853ab5c8ca4Slogin } 854ab5c8ca4Slogin 855ab5c8ca4Slogin SYS_RECVFROM => { 856ab5c8ca4Slogin let buf = args[1] as *mut u8; 857ab5c8ca4Slogin let len = args[2] as usize; 858ab5c8ca4Slogin let flags = args[3] as u32; 859ab5c8ca4Slogin let addr = args[4] as *mut SockAddr; 860ab5c8ca4Slogin let addrlen = args[5] as *mut usize; 861be63f3b2Shoumkh let virt_buf = VirtAddr::new(buf as usize); 862be63f3b2Shoumkh let virt_addrlen = VirtAddr::new(addrlen as usize); 863be63f3b2Shoumkh let virt_addr = VirtAddr::new(addr as usize); 864ab5c8ca4Slogin let security_check = || { 865ab5c8ca4Slogin // 验证buf的地址是否合法 866be63f3b2Shoumkh if verify_area(virt_buf, len as usize).is_err() { 867ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 868ab5c8ca4Slogin return Err(SystemError::EFAULT); 869ab5c8ca4Slogin } 870ab5c8ca4Slogin 871ab5c8ca4Slogin // 验证addrlen的地址是否合法 872be63f3b2Shoumkh if verify_area(virt_addrlen, core::mem::size_of::<u32>() as usize).is_err() { 873ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 874ab5c8ca4Slogin return Err(SystemError::EFAULT); 875ab5c8ca4Slogin } 876ab5c8ca4Slogin 877be63f3b2Shoumkh if verify_area(virt_addr, core::mem::size_of::<SockAddr>() as usize).is_err() { 878ab5c8ca4Slogin // 地址空间超出了用户空间的范围,不合法 879ab5c8ca4Slogin return Err(SystemError::EFAULT); 880ab5c8ca4Slogin } 881ab5c8ca4Slogin return Ok(()); 882ab5c8ca4Slogin }; 883ab5c8ca4Slogin let r = security_check(); 884ab5c8ca4Slogin if r.is_err() { 885ab5c8ca4Slogin Err(r.unwrap_err()) 886ab5c8ca4Slogin } else { 887ab5c8ca4Slogin let buf = unsafe { core::slice::from_raw_parts_mut(buf, len) }; 888ab5c8ca4Slogin Self::recvfrom(args[0], buf, flags, addr, addrlen as *mut u32) 889ab5c8ca4Slogin } 890ab5c8ca4Slogin } 891ab5c8ca4Slogin 892ab5c8ca4Slogin SYS_RECVMSG => { 893ab5c8ca4Slogin let msg = args[1] as *mut crate::net::syscall::MsgHdr; 894ab5c8ca4Slogin let flags = args[2] as u32; 8954537ffb7SChiichen match UserBufferWriter::new( 8964537ffb7SChiichen msg, 8974537ffb7SChiichen core::mem::size_of::<crate::net::syscall::MsgHdr>(), 8984537ffb7SChiichen true, 8994537ffb7SChiichen ) { 9004537ffb7SChiichen Err(e) => Err(e), 9014537ffb7SChiichen Ok(mut user_buffer_writer) => { 9024537ffb7SChiichen match user_buffer_writer.buffer::<crate::net::syscall::MsgHdr>(0) { 9034537ffb7SChiichen Err(e) => Err(e), 9044537ffb7SChiichen Ok(buffer) => { 9054537ffb7SChiichen let msg = &mut buffer[0]; 906ab5c8ca4Slogin Self::recvmsg(args[0], msg, flags) 907ab5c8ca4Slogin } 908ab5c8ca4Slogin } 9094537ffb7SChiichen } 9104537ffb7SChiichen } 9114537ffb7SChiichen } 912ab5c8ca4Slogin 913ab5c8ca4Slogin SYS_LISTEN => Self::listen(args[0], args[1]), 914ab5c8ca4Slogin SYS_SHUTDOWN => Self::shutdown(args[0], args[1]), 915ab5c8ca4Slogin SYS_ACCEPT => Self::accept(args[0], args[1] as *mut SockAddr, args[2] as *mut u32), 916ab5c8ca4Slogin SYS_GETSOCKNAME => { 917ab5c8ca4Slogin Self::getsockname(args[0], args[1] as *mut SockAddr, args[2] as *mut u32) 918ab5c8ca4Slogin } 919ab5c8ca4Slogin SYS_GETPEERNAME => { 920ab5c8ca4Slogin Self::getpeername(args[0], args[1] as *mut SockAddr, args[2] as *mut u32) 921ab5c8ca4Slogin } 92236fd0130Shoumkh SYS_GETTIMEOFDAY => { 92336fd0130Shoumkh let timeval = args[0] as *mut PosixTimeval; 92440fe15e0SLoGin let timezone_ptr = args[1] as *mut PosixTimeZone; 92540fe15e0SLoGin Self::gettimeofday(timeval, timezone_ptr) 9264537ffb7SChiichen } 92740fe15e0SLoGin SYS_MMAP => { 92840fe15e0SLoGin let len = page_align_up(args[1]); 929be63f3b2Shoumkh let virt_addr = VirtAddr::new(args[0] as usize); 930be63f3b2Shoumkh if verify_area(virt_addr, len as usize).is_err() { 93140fe15e0SLoGin Err(SystemError::EFAULT) 93240fe15e0SLoGin } else { 93340fe15e0SLoGin Self::mmap( 93440fe15e0SLoGin VirtAddr::new(args[0]), 93540fe15e0SLoGin len, 93640fe15e0SLoGin args[2], 93740fe15e0SLoGin args[3], 93840fe15e0SLoGin args[4] as i32, 93940fe15e0SLoGin args[5], 94040fe15e0SLoGin ) 94140fe15e0SLoGin } 94240fe15e0SLoGin } 94340fe15e0SLoGin SYS_MUNMAP => { 94440fe15e0SLoGin let addr = args[0]; 94540fe15e0SLoGin let len = page_align_up(args[1]); 94640fe15e0SLoGin if addr & MMArch::PAGE_SIZE != 0 { 94740fe15e0SLoGin // The addr argument is not a multiple of the page size 94840fe15e0SLoGin Err(SystemError::EINVAL) 94940fe15e0SLoGin } else { 95040fe15e0SLoGin Self::munmap(VirtAddr::new(addr), len) 95140fe15e0SLoGin } 95240fe15e0SLoGin } 95340fe15e0SLoGin SYS_MPROTECT => { 95440fe15e0SLoGin let addr = args[0]; 95540fe15e0SLoGin let len = page_align_up(args[1]); 95640fe15e0SLoGin if addr & MMArch::PAGE_SIZE != 0 { 95740fe15e0SLoGin // The addr argument is not a multiple of the page size 95840fe15e0SLoGin Err(SystemError::EINVAL) 95940fe15e0SLoGin } else { 96040fe15e0SLoGin Self::mprotect(VirtAddr::new(addr), len, args[2]) 96140fe15e0SLoGin } 96240fe15e0SLoGin } 96340fe15e0SLoGin 9641496ba7bSLoGin SYS_GETCWD => { 9651496ba7bSLoGin let buf = args[0] as *mut u8; 9661496ba7bSLoGin let size = args[1] as usize; 9671496ba7bSLoGin let security_check = || { 9681496ba7bSLoGin verify_area(VirtAddr::new(buf as usize), size)?; 9691496ba7bSLoGin return Ok(()); 9701496ba7bSLoGin }; 9711496ba7bSLoGin let r = security_check(); 9721496ba7bSLoGin if r.is_err() { 9731496ba7bSLoGin Err(r.unwrap_err()) 9741496ba7bSLoGin } else { 9751496ba7bSLoGin let buf = unsafe { core::slice::from_raw_parts_mut(buf, size) }; 9761496ba7bSLoGin Self::getcwd(buf).map(|ptr| ptr.data()) 9771496ba7bSLoGin } 9781496ba7bSLoGin } 9791496ba7bSLoGin 9801496ba7bSLoGin SYS_GETPGID => Self::getpgid(Pid::new(args[0])).map(|pid| pid.into()), 9811496ba7bSLoGin 9821496ba7bSLoGin SYS_GETPPID => Self::getppid().map(|pid| pid.into()), 983be63f3b2Shoumkh SYS_FSTAT => { 984be63f3b2Shoumkh let fd = args[0] as i32; 985be63f3b2Shoumkh let kstat = args[1] as *mut PosixKstat; 986be63f3b2Shoumkh let vaddr = VirtAddr::new(kstat as usize); 987be63f3b2Shoumkh // FIXME 由于c中的verify_area与rust中的verify_area重名,所以在引入时加了前缀区分 988be63f3b2Shoumkh // TODO 应该将用了c版本的verify_area都改为rust的verify_area 989be63f3b2Shoumkh match verify_area(vaddr, core::mem::size_of::<PosixKstat>()) { 990be63f3b2Shoumkh Ok(_) => Self::fstat(fd, kstat), 991be63f3b2Shoumkh Err(e) => Err(e), 992be63f3b2Shoumkh } 993be63f3b2Shoumkh } 994be63f3b2Shoumkh 9956d81180bSLoGin SYS_FCNTL => { 9966d81180bSLoGin let fd = args[0] as i32; 9976d81180bSLoGin let cmd: Option<FcntlCommand> = 9986d81180bSLoGin <FcntlCommand as FromPrimitive>::from_u32(args[1] as u32); 9996d81180bSLoGin let arg = args[2] as i32; 10006d81180bSLoGin let res = if let Some(cmd) = cmd { 10016d81180bSLoGin Self::fcntl(fd, cmd, arg) 10026d81180bSLoGin } else { 10036d81180bSLoGin Err(SystemError::EINVAL) 10046d81180bSLoGin }; 10056d81180bSLoGin 10066d81180bSLoGin // kdebug!("FCNTL: fd: {}, cmd: {:?}, arg: {}, res: {:?}", fd, cmd, arg, res); 10076d81180bSLoGin res 10086d81180bSLoGin } 10096d81180bSLoGin 10106d81180bSLoGin SYS_FTRUNCATE => { 10116d81180bSLoGin let fd = args[0] as i32; 10126d81180bSLoGin let len = args[1] as usize; 10136d81180bSLoGin let res = Self::ftruncate(fd, len); 10146d81180bSLoGin // kdebug!("FTRUNCATE: fd: {}, len: {}, res: {:?}", fd, len, res); 10156d81180bSLoGin res 10166d81180bSLoGin } 10176d81180bSLoGin 10182dbef785SGnoCiYeH SYS_MKNOD => { 10192dbef785SGnoCiYeH let path = args[0]; 10202dbef785SGnoCiYeH let flags = args[1]; 10212dbef785SGnoCiYeH let dev_t = args[2]; 10222dbef785SGnoCiYeH let flags: ModeType = ModeType::from_bits_truncate(flags as u32); 10232dbef785SGnoCiYeH Self::mknod(path as *const i8, flags, DeviceNumber::from(dev_t)) 10242dbef785SGnoCiYeH } 10252dbef785SGnoCiYeH 1026ab5c8ca4Slogin _ => panic!("Unsupported syscall ID: {}", syscall_num), 1027ab5c8ca4Slogin }; 1028ab5c8ca4Slogin return r; 1029ab5c8ca4Slogin } 1030ab5c8ca4Slogin 1031ab5c8ca4Slogin pub fn put_string( 1032ab5c8ca4Slogin s: *const u8, 1033ab5c8ca4Slogin front_color: u32, 1034ab5c8ca4Slogin back_color: u32, 1035ab5c8ca4Slogin ) -> Result<usize, SystemError> { 1036ab5c8ca4Slogin return Ok(unsafe { do_put_string(s, front_color, back_color) }); 1037ab5c8ca4Slogin } 1038ab5c8ca4Slogin 1039ab5c8ca4Slogin pub fn reboot() -> Result<usize, SystemError> { 1040ab5c8ca4Slogin cpu_reset(); 1041ab5c8ca4Slogin } 1042ab5c8ca4Slogin } 1043