mirror of
https://github.com/fluencelabs/wasmer
synced 2025-06-22 05:01:33 +00:00
re-organize modules for syscalls, windows is in bad shape
This commit is contained in:
Mackenzie Clark
589
lib/emscripten/src/syscalls/unix/host_fs.rs
Normal file
589
lib/emscripten/src/syscalls/unix/host_fs.rs
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@ -0,0 +1,589 @@
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use crate::varargs::VarArgs;
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/// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
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/// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
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use libc::{
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accept, bind, c_char, c_int, c_void, connect, dup2, fcntl, getgid, getpeername, getsockname,
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getsockopt, in_addr_t, in_port_t, ioctl, listen, msghdr, pid_t, recvfrom, recvmsg, sa_family_t,
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select, sendmsg, sendto, setsockopt, sockaddr, socket, socklen_t, EINVAL, FIOCLEX, FIONBIO,
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F_GETFD, F_SETFD, SOL_SOCKET, SO_REUSEADDR, TIOCGWINSZ,
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};
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use wasmer_runtime_core::vm::Ctx;
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use std::slice;
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// Another conditional constant for name resolution: Macos et iOS use
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// SO_NOSIGPIPE as a setsockopt flag to disable SIGPIPE emission on socket.
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// Other platforms do otherwise.
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use crate::utils::copy_stat_into_wasm;
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#[cfg(target_os = "darwin")]
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use libc::SO_NOSIGPIPE;
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#[cfg(not(target_os = "darwin"))]
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const SO_NOSIGPIPE: c_int = 0;
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/// read
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pub fn ___syscall3(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
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// -> ssize_t
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debug!("emscripten::___syscall3 (read) {}", _which);
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let fd: i32 = varargs.get(ctx);
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let buf: u32 = varargs.get(ctx);
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let count: i32 = varargs.get(ctx);
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debug!("=> fd: {}, buf_offset: {}, count: {}", fd, buf, count);
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let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut c_void;
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let ret = unsafe { libc::read(fd, buf_addr, count as _) };
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debug!("=> ret: {}", ret);
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ret as _
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}
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/// write
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pub fn ___syscall4(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall4 (write) {}", _which);
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let fd: i32 = varargs.get(ctx);
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let buf: u32 = varargs.get(ctx);
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let count: i32 = varargs.get(ctx);
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debug!("=> fd: {}, buf: {}, count: {}", fd, buf, count);
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let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *const c_void;
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unsafe { libc::write(fd, buf_addr, count as _) as i32 }
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}
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/// open
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pub fn ___syscall5(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall5 (open) {}", _which);
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let pathname: u32 = varargs.get(ctx);
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let flags: i32 = varargs.get(ctx);
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let mode: u32 = varargs.get(ctx);
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let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
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let _path_str = unsafe { std::ffi::CStr::from_ptr(pathname_addr).to_str().unwrap() };
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let fd = unsafe { libc::open(pathname_addr, flags, mode) };
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debug!(
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"=> pathname: {}, flags: {}, mode: {} = fd: {}\npath: {}",
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pathname, flags, mode, fd, _path_str
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);
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fd
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}
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/// close
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pub fn ___syscall6(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall6 (close) {}", _which);
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let fd: i32 = varargs.get(ctx);
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debug!("fd: {}", fd);
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unsafe { libc::close(fd) }
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}
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/// chmod
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pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
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debug!("emscripten::___syscall15");
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-1
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}
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/// chown
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pub fn ___syscall212(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall212 (chown) {}", _which);
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let pathname: u32 = varargs.get(ctx);
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let owner: u32 = varargs.get(ctx);
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let group: u32 = varargs.get(ctx);
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let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
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unsafe { libc::chown(pathname_addr, owner, group) }
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}
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/// mkdir
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pub fn ___syscall39(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall39 (mkdir) {}", _which);
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let pathname: u32 = varargs.get(ctx);
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let mode: u32 = varargs.get(ctx);
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let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
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unsafe { libc::mkdir(pathname_addr, mode as _) }
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}
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/// pipe
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pub fn ___syscall42(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall42 (pipe)");
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// offset to a file descriptor, which contains a read end and write end, 2 integers
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let fd_offset: u32 = varargs.get(ctx);
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let emscripten_memory = ctx.memory(0);
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// convert the file descriptor into a vec with two slots
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let mut fd_vec: Vec<c_int> = emscripten_memory.view()[((fd_offset / 4) as usize)..]
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.iter()
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.map(|pipe_end: &std::cell::Cell<c_int>| pipe_end.get())
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.take(2)
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.collect();
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// get it as a mutable pointer
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let fd_ptr = fd_vec.as_mut_ptr();
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// call pipe and store the pointers in this array
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#[cfg(target_os = "windows")]
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let result: c_int = unsafe { libc::pipe(fd_ptr, 2048, 0) };
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#[cfg(not(target_os = "windows"))]
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let result: c_int = unsafe { libc::pipe(fd_ptr) };
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result
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}
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/// dup2
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pub fn ___syscall63(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall63 (dup2) {}", _which);
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let src: i32 = varargs.get(ctx);
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let dst: i32 = varargs.get(ctx);
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unsafe { libc::dup2(src, dst) }
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}
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// getgid
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//#[cfg(not(feature = "vfs"))]
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pub fn ___syscall201(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
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debug!("emscripten::___syscall201 (getgid)");
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let result = unsafe {
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// Maybe fix: Emscripten returns 0 always
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getgid() as i32
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};
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result
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}
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// getgid32
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pub fn ___syscall202(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
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// gid_t
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debug!("emscripten::___syscall202 (getgid32)");
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unsafe {
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// Maybe fix: Emscripten returns 0 always
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getgid() as _
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}
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}
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/// dup3
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pub fn ___syscall330(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_t {
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// Implementation based on description at https://linux.die.net/man/2/dup3
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debug!("emscripten::___syscall330 (dup3)");
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let oldfd: c_int = varargs.get(ctx);
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let newfd: c_int = varargs.get(ctx);
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let flags: c_int = varargs.get(ctx);
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if oldfd == newfd {
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return EINVAL;
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}
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let res = unsafe { dup2(oldfd, newfd) };
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// Set flags on newfd (https://www.gnu.org/software/libc/manual/html_node/Descriptor-Flags.html)
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let mut old_flags = unsafe { fcntl(newfd, F_GETFD, 0) };
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if old_flags > 0 {
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old_flags |= flags;
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} else if old_flags == 0 {
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old_flags &= !flags;
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}
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unsafe {
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fcntl(newfd, F_SETFD, old_flags);
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}
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debug!(
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"=> oldfd: {}, newfd: {}, flags: {} = pid: {}",
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oldfd, newfd, flags, res
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);
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res
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}
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/// ioctl
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pub fn ___syscall54(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall54 (ioctl) {}", _which);
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let fd: i32 = varargs.get(ctx);
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let request: u32 = varargs.get(ctx);
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debug!("fd: {}, op: {}", fd, request);
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// Got the equivalents here: https://code.woboq.org/linux/linux/include/uapi/asm-generic/ioctls.h.html
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match request as _ {
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21537 => {
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// FIONBIO
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let argp: u32 = varargs.get(ctx);
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let argp_ptr = emscripten_memory_pointer!(ctx.memory(0), argp) as *mut c_void;
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let ret = unsafe { ioctl(fd, FIONBIO, argp_ptr) };
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debug!("ret(FIONBIO): {}", ret);
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ret
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// 0
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}
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21523 => {
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// TIOCGWINSZ
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let argp: u32 = varargs.get(ctx);
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let argp_ptr = emscripten_memory_pointer!(ctx.memory(0), argp) as *mut c_void;
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let ret = unsafe { ioctl(fd, TIOCGWINSZ, argp_ptr) };
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debug!("ret(TIOCGWINSZ): {} (harcoded to 0)", ret);
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// ret
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// TODO: We hardcode the value to have emscripten tests pass, as for some reason
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// when the capturer is active, ioctl returns -1 instead of 0
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if ret == -1 {
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0
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} else {
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ret
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}
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}
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_ => {
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debug!(
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"emscripten::___syscall54 -> non implemented case {}",
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request
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);
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0
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}
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}
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}
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// socketcall
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#[allow(clippy::cast_ptr_alignment)]
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pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
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debug!("emscripten::___syscall102 (socketcall) {}", _which);
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let call: u32 = varargs.get(ctx);
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let mut socket_varargs: VarArgs = varargs.get(ctx);
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#[repr(C)]
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pub struct GuestSockaddrIn {
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pub sin_family: sa_family_t, // u16
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pub sin_port: in_port_t, // u16
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pub sin_addr: GuestInAddr, // u32
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pub sin_zero: [u8; 8], // u8 * 8
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// 2 + 2 + 4 + 8 = 16
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}
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#[repr(C)]
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pub struct GuestInAddr {
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pub s_addr: in_addr_t, // u32
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}
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// debug!("GuestSockaddrIn = {}", size_of::<GuestSockaddrIn>());
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pub struct LinuxSockAddr {
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pub sa_family: u16,
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pub sa_data: [c_char; 14],
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}
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match call {
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1 => {
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debug!("socket: socket");
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// socket (domain: c_int, ty: c_int, protocol: c_int) -> c_int
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let domain: i32 = socket_varargs.get(ctx);
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let ty: i32 = socket_varargs.get(ctx);
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let protocol: i32 = socket_varargs.get(ctx);
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let fd = unsafe { socket(domain, ty, protocol) };
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// set_cloexec
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unsafe {
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ioctl(fd, FIOCLEX);
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};
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let _err = errno::errno();
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// type T = u32;
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// let payload = 1 as *const T as _;
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let _result = unsafe { setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, 0 as *const _, 4) };
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let _err2 = errno::errno();
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debug!(
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"=> domain: {} (AF_INET/2), type: {} (SOCK_STREAM/1), protocol: {} = fd: {}",
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domain, ty, protocol, fd
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);
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fd as _
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}
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2 => {
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debug!("socket: bind");
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// bind (socket: c_int, address: *const sockaddr, address_len: socklen_t) -> c_int
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// TODO: Emscripten has a different signature.
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let socket = socket_varargs.get(ctx);
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let address: u32 = socket_varargs.get(ctx);
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let address_len = socket_varargs.get(ctx);
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let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
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// Debug received address
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let _proper_address = address as *const GuestSockaddrIn;
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debug!(
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"=> address.sin_family: {:?}, address.sin_port: {:?}, address.sin_addr.s_addr: {:?}",
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unsafe { (*_proper_address).sin_family }, unsafe { (*_proper_address).sin_port }, unsafe { (*_proper_address).sin_addr.s_addr }
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);
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let status = unsafe { bind(socket, address, address_len) };
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// debug!("=> status: {}", status);
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debug!(
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"=> socketfd: {}, address: {:?}, address_len: {} = status: {}",
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socket, address, address_len, status
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);
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status
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// -1
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}
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3 => {
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debug!("socket: connect");
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// connect (socket: c_int, address: *const sockaddr, len: socklen_t) -> c_int
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// TODO: Emscripten has a different signature.
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let socket = socket_varargs.get(ctx);
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let address: u32 = socket_varargs.get(ctx);
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let address_len = socket_varargs.get(ctx);
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let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
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unsafe { connect(socket, address, address_len) }
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}
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4 => {
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debug!("socket: listen");
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// listen (socket: c_int, backlog: c_int) -> c_int
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let socket = socket_varargs.get(ctx);
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let backlog: i32 = socket_varargs.get(ctx);
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let status = unsafe { listen(socket, backlog) };
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debug!(
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"=> socketfd: {}, backlog: {} = status: {}",
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socket, backlog, status
|
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);
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status
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}
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5 => {
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debug!("socket: accept");
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// accept (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
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let socket = socket_varargs.get(ctx);
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let address_addr: u32 = socket_varargs.get(ctx);
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let address_len: u32 = socket_varargs.get(ctx);
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let address = emscripten_memory_pointer!(ctx.memory(0), address_addr) as *mut sockaddr;
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debug!(
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"=> socket: {}, address: {:?}, address_len: {}",
|
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socket, address, address_len
|
||||
);
|
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let address_len_addr =
|
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emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
|
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// let mut address_len_addr: socklen_t = 0;
|
||||
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let fd = unsafe { accept(socket, address, address_len_addr) };
|
||||
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||||
unsafe {
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let address_linux =
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emscripten_memory_pointer!(ctx.memory(0), address_addr) as *mut LinuxSockAddr;
|
||||
(*address_linux).sa_family = (*address).sa_family as u16;
|
||||
(*address_linux).sa_data = (*address).sa_data;
|
||||
let _proper_address = address as *const GuestSockaddrIn;
|
||||
let _x = 10;
|
||||
};
|
||||
|
||||
// set_cloexec
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||||
unsafe {
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||||
ioctl(fd, FIOCLEX);
|
||||
};
|
||||
|
||||
debug!("fd: {}", fd);
|
||||
|
||||
fd as _
|
||||
}
|
||||
6 => {
|
||||
debug!("socket: getsockname");
|
||||
// getsockname (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
|
||||
let socket = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len: u32 = socket_varargs.get(ctx);
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
|
||||
let address_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
|
||||
unsafe { getsockname(socket, address, address_len_addr) }
|
||||
}
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||||
7 => {
|
||||
debug!("socket: getpeername");
|
||||
// getpeername (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
|
||||
let socket = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len: u32 = socket_varargs.get(ctx);
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
|
||||
let address_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
|
||||
unsafe { getpeername(socket, address, address_len_addr) }
|
||||
}
|
||||
11 => {
|
||||
debug!("socket: sendto");
|
||||
// sendto (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
|
||||
let socket = socket_varargs.get(ctx);
|
||||
let buf: u32 = socket_varargs.get(ctx);
|
||||
let flags = socket_varargs.get(ctx);
|
||||
let len: i32 = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len = socket_varargs.get(ctx);
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
|
||||
unsafe { sendto(socket, buf_addr, flags, len, address, address_len) as i32 }
|
||||
}
|
||||
12 => {
|
||||
debug!("socket: recvfrom");
|
||||
// recvfrom (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
|
||||
let socket = socket_varargs.get(ctx);
|
||||
let buf: u32 = socket_varargs.get(ctx);
|
||||
let flags = socket_varargs.get(ctx);
|
||||
let len: i32 = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len: u32 = socket_varargs.get(ctx);
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut sockaddr;
|
||||
let address_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut socklen_t;
|
||||
unsafe { recvfrom(socket, buf_addr, flags, len, address, address_len_addr) as i32 }
|
||||
}
|
||||
14 => {
|
||||
debug!("socket: setsockopt");
|
||||
// NOTE: Emscripten seems to be passing the wrong values to this syscall
|
||||
// level: Em passes 1 as SOL_SOCKET; SOL_SOCKET is 0xffff in BSD
|
||||
// name: Em passes SO_ACCEPTCONN, but Nginx complains about REUSEADDR
|
||||
// https://github.com/openbsd/src/blob/master/sys/sys/socket.h#L156
|
||||
// setsockopt (socket: c_int, level: c_int, name: c_int, value: *const c_void, option_len: socklen_t) -> c_int
|
||||
|
||||
let socket = socket_varargs.get(ctx);
|
||||
// SOL_SOCKET = 0xffff (BSD, Linux)
|
||||
let level: i32 = SOL_SOCKET;
|
||||
let _: u32 = socket_varargs.get(ctx);
|
||||
// SO_REUSEADDR = 0x4 (BSD, Linux)
|
||||
let name: i32 = SO_REUSEADDR;
|
||||
let _: u32 = socket_varargs.get(ctx);
|
||||
let value: u32 = socket_varargs.get(ctx);
|
||||
let option_len = socket_varargs.get(ctx);
|
||||
let value_addr = emscripten_memory_pointer!(ctx.memory(0), value) as _; // Endian problem
|
||||
let ret = unsafe { setsockopt(socket, level, name, value_addr, option_len) };
|
||||
|
||||
debug!("=> socketfd: {}, level: {} (SOL_SOCKET/0xffff), name: {} (SO_REUSEADDR/4), value_addr: {:?}, option_len: {} = status: {}", socket, level, name, value_addr, option_len, ret);
|
||||
ret
|
||||
}
|
||||
15 => {
|
||||
debug!("socket: getsockopt");
|
||||
// getsockopt (sockfd: c_int, level: c_int, optname: c_int, optval: *mut c_void, optlen: *mut socklen_t) -> c_int
|
||||
let socket = socket_varargs.get(ctx);
|
||||
let level: i32 = socket_varargs.get(ctx);
|
||||
let name: i32 = socket_varargs.get(ctx);
|
||||
let value: u32 = socket_varargs.get(ctx);
|
||||
let option_len: u32 = socket_varargs.get(ctx);
|
||||
let value_addr = emscripten_memory_pointer!(ctx.memory(0), value) as _;
|
||||
let option_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), option_len) as *mut socklen_t;
|
||||
let result = unsafe { getsockopt(socket, level, name, value_addr, option_len_addr) };
|
||||
result
|
||||
}
|
||||
16 => {
|
||||
debug!("socket: sendmsg");
|
||||
// sendmsg (fd: c_int, msg: *const msghdr, flags: c_int) -> ssize_t
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let msg: u32 = socket_varargs.get(ctx);
|
||||
let flags: i32 = socket_varargs.get(ctx);
|
||||
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *const msghdr;
|
||||
unsafe { sendmsg(socket, msg_addr, flags) as i32 }
|
||||
}
|
||||
17 => {
|
||||
debug!("socket: recvmsg");
|
||||
// recvmsg (fd: c_int, msg: *mut msghdr, flags: c_int) -> ssize_t
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let msg: u32 = socket_varargs.get(ctx);
|
||||
let flags: i32 = socket_varargs.get(ctx);
|
||||
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *mut msghdr;
|
||||
unsafe { recvmsg(socket, msg_addr, flags) as i32 }
|
||||
}
|
||||
_ => {
|
||||
// others
|
||||
-1
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// pread
|
||||
pub fn ___syscall180(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall180 (pread) {}", _which);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let count: u32 = varargs.get(ctx);
|
||||
{
|
||||
let zero: u32 = varargs.get(ctx);
|
||||
assert_eq!(zero, 0);
|
||||
}
|
||||
let offset: i64 = varargs.get(ctx);
|
||||
|
||||
let buf_ptr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
|
||||
|
||||
unsafe { libc::pread(fd, buf_ptr, count as _, offset) as _ }
|
||||
}
|
||||
|
||||
/// pwrite
|
||||
pub fn ___syscall181(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall181 (pwrite) {}", _which);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let count: u32 = varargs.get(ctx);
|
||||
{
|
||||
let zero: u32 = varargs.get(ctx);
|
||||
assert_eq!(zero, 0);
|
||||
}
|
||||
let offset: i64 = varargs.get(ctx);
|
||||
|
||||
let buf_ptr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
|
||||
let status = unsafe { libc::pwrite(fd, buf_ptr, count as _, offset) as _ };
|
||||
debug!(
|
||||
"=> fd: {}, buf: {}, count: {}, offset: {} = status:{}",
|
||||
fd, buf, count, offset, status
|
||||
);
|
||||
status
|
||||
}
|
||||
|
||||
// select
|
||||
#[allow(clippy::cast_ptr_alignment)]
|
||||
pub fn ___syscall142(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall142 (newselect) {}", _which);
|
||||
|
||||
let nfds: i32 = varargs.get(ctx);
|
||||
let readfds: u32 = varargs.get(ctx);
|
||||
let writefds: u32 = varargs.get(ctx);
|
||||
let exceptfds: u32 = varargs.get(ctx);
|
||||
let _timeout: i32 = varargs.get(ctx);
|
||||
|
||||
let readfds_set_ptr = emscripten_memory_pointer!(ctx.memory(0), readfds) as *mut _;
|
||||
let readfds_set_u8_ptr = readfds_set_ptr as *mut u8;
|
||||
let writefds_set_ptr = emscripten_memory_pointer!(ctx.memory(0), writefds) as *mut _;
|
||||
let writefds_set_u8_ptr = writefds_set_ptr as *mut u8;
|
||||
|
||||
let nfds = nfds as _;
|
||||
let readfds_slice = unsafe { slice::from_raw_parts_mut(readfds_set_u8_ptr, nfds) };
|
||||
let _writefds_slice = unsafe { slice::from_raw_parts_mut(writefds_set_u8_ptr, nfds) };
|
||||
let nfds = nfds as _;
|
||||
|
||||
use bit_field::BitArray;
|
||||
|
||||
let mut bits = vec![];
|
||||
for virtual_fd in 0..nfds {
|
||||
let bit_flag = readfds_slice.get_bit(virtual_fd as usize);
|
||||
if !bit_flag {
|
||||
continue;
|
||||
}
|
||||
bits.push(virtual_fd);
|
||||
}
|
||||
|
||||
let readfds_ptr = emscripten_memory_pointer!(ctx.memory(0), readfds) as _;
|
||||
let writefds_ptr = emscripten_memory_pointer!(ctx.memory(0), writefds) as _;
|
||||
|
||||
// let rd = unsafe { libc::read(bits[0], 0 as *mut _, 0)};
|
||||
|
||||
let _err = errno::errno();
|
||||
|
||||
let result = unsafe { select(nfds, readfds_ptr, writefds_ptr, 0 as _, 0 as _) };
|
||||
|
||||
assert!(nfds <= 64, "`nfds` must be less than or equal to 64");
|
||||
assert!(exceptfds == 0, "`exceptfds` is not supporrted");
|
||||
|
||||
let _err = errno::errno();
|
||||
debug!("gah again: {}", _err);
|
||||
|
||||
result
|
||||
// unsafe { select(nfds, readfds_ptr, writefds_ptr, 0 as _, 0 as _) }
|
||||
}
|
||||
|
||||
/// fstat64
|
||||
pub fn ___syscall197(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall197 (fstat64) {}", _which);
|
||||
let fd: c_int = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
|
||||
unsafe {
|
||||
let mut stat = std::mem::zeroed();
|
||||
let ret = libc::fstat(fd, &mut stat);
|
||||
debug!("ret: {}", ret);
|
||||
if ret != 0 {
|
||||
return ret;
|
||||
}
|
||||
copy_stat_into_wasm(ctx, buf, &stat);
|
||||
}
|
||||
|
||||
0
|
||||
}
|
||||
129
lib/emscripten/src/syscalls/unix/mod.rs
Normal file
129
lib/emscripten/src/syscalls/unix/mod.rs
Normal file
@ -0,0 +1,129 @@
|
||||
use crate::varargs::VarArgs;
|
||||
|
||||
#[cfg(not(feature = "vfs"))]
|
||||
pub mod host_fs;
|
||||
|
||||
#[cfg(feature = "vfs")]
|
||||
pub mod vfs;
|
||||
|
||||
#[cfg(not(feature = "vfs"))]
|
||||
pub use host_fs::*;
|
||||
|
||||
#[cfg(feature = "vfs")]
|
||||
pub use vfs::*;
|
||||
|
||||
/// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
|
||||
/// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
|
||||
use libc::{
|
||||
c_int, dup2, fcntl, getgid, pid_t, rusage, setpgid, uname, utsname, EINVAL, F_GETFD, F_SETFD,
|
||||
};
|
||||
use wasmer_runtime_core::vm::Ctx;
|
||||
|
||||
// Linking to functions that are not provided by rust libc
|
||||
#[cfg(target_os = "macos")]
|
||||
#[link(name = "c")]
|
||||
extern "C" {
|
||||
pub fn wait4(pid: pid_t, status: *mut c_int, options: c_int, rusage: *mut rusage) -> pid_t;
|
||||
}
|
||||
|
||||
#[cfg(not(target_os = "macos"))]
|
||||
use libc::wait4;
|
||||
|
||||
// Another conditional constant for name resolution: Macos et iOS use
|
||||
// SO_NOSIGPIPE as a setsockopt flag to disable SIGPIPE emission on socket.
|
||||
// Other platforms do otherwise.
|
||||
//#[cfg(target_os = "darwin")]
|
||||
//use libc::SO_NOSIGPIPE;
|
||||
//#[cfg(not(target_os = "darwin"))]
|
||||
//const SO_NOSIGPIPE: c_int = 0;
|
||||
|
||||
// getgid
|
||||
//#[cfg(not(feature = "vfs"))]
|
||||
pub fn ___syscall201(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
|
||||
debug!("emscripten::___syscall201 (getgid)");
|
||||
let result = unsafe {
|
||||
// Maybe fix: Emscripten returns 0 always
|
||||
getgid() as i32
|
||||
};
|
||||
result
|
||||
}
|
||||
|
||||
// getgid32
|
||||
pub fn ___syscall202(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
|
||||
// gid_t
|
||||
debug!("emscripten::___syscall202 (getgid32)");
|
||||
unsafe {
|
||||
// Maybe fix: Emscripten returns 0 always
|
||||
getgid() as _
|
||||
}
|
||||
}
|
||||
|
||||
/// dup3
|
||||
pub fn ___syscall330(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_t {
|
||||
// Implementation based on description at https://linux.die.net/man/2/dup3
|
||||
debug!("emscripten::___syscall330 (dup3)");
|
||||
let oldfd: c_int = varargs.get(ctx);
|
||||
let newfd: c_int = varargs.get(ctx);
|
||||
let flags: c_int = varargs.get(ctx);
|
||||
|
||||
if oldfd == newfd {
|
||||
return EINVAL;
|
||||
}
|
||||
|
||||
let res = unsafe { dup2(oldfd, newfd) };
|
||||
|
||||
// Set flags on newfd (https://www.gnu.org/software/libc/manual/html_node/Descriptor-Flags.html)
|
||||
let mut old_flags = unsafe { fcntl(newfd, F_GETFD, 0) };
|
||||
|
||||
if old_flags > 0 {
|
||||
old_flags |= flags;
|
||||
} else if old_flags == 0 {
|
||||
old_flags &= !flags;
|
||||
}
|
||||
|
||||
unsafe {
|
||||
fcntl(newfd, F_SETFD, old_flags);
|
||||
}
|
||||
|
||||
debug!(
|
||||
"=> oldfd: {}, newfd: {}, flags: {} = pid: {}",
|
||||
oldfd, newfd, flags, res
|
||||
);
|
||||
res
|
||||
}
|
||||
|
||||
/// wait4
|
||||
#[allow(clippy::cast_ptr_alignment)]
|
||||
pub fn ___syscall114(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> pid_t {
|
||||
debug!("emscripten::___syscall114 (wait4)");
|
||||
let pid: pid_t = varargs.get(ctx);
|
||||
let status: u32 = varargs.get(ctx);
|
||||
let options: c_int = varargs.get(ctx);
|
||||
let rusage: u32 = varargs.get(ctx);
|
||||
let status_addr = emscripten_memory_pointer!(ctx.memory(0), status) as *mut c_int;
|
||||
let rusage_addr = emscripten_memory_pointer!(ctx.memory(0), rusage) as *mut rusage;
|
||||
let res = unsafe { wait4(pid, status_addr, options, rusage_addr) };
|
||||
debug!(
|
||||
"=> pid: {}, status: {:?}, options: {}, rusage: {:?} = pid: {}",
|
||||
pid, status_addr, options, rusage_addr, res
|
||||
);
|
||||
res
|
||||
}
|
||||
|
||||
/// setpgid
|
||||
pub fn ___syscall57(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall57 (setpgid) {}", _which);
|
||||
let pid: i32 = varargs.get(ctx);
|
||||
let pgid: i32 = varargs.get(ctx);
|
||||
unsafe { setpgid(pid, pgid) }
|
||||
}
|
||||
|
||||
/// uname
|
||||
// NOTE: Wondering if we should return custom utsname, like Emscripten.
|
||||
pub fn ___syscall122(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall122 (uname) {}", _which);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
debug!("=> buf: {}", buf);
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut utsname;
|
||||
unsafe { uname(buf_addr) }
|
||||
}
|
||||
911
lib/emscripten/src/syscalls/unix/vfs.rs
Normal file
911
lib/emscripten/src/syscalls/unix/vfs.rs
Normal file
@ -0,0 +1,911 @@
|
||||
use crate::utils::{copy_stat_into_wasm, read_string_from_wasm};
|
||||
use crate::varargs::VarArgs;
|
||||
use libc::stat;
|
||||
use std::os::raw::c_int;
|
||||
use std::slice;
|
||||
use wasmer_runtime_core::vm::Ctx;
|
||||
|
||||
// Another conditional constant for name resolution: Macos et iOS use
|
||||
// SO_NOSIGPIPE as a setsockopt flag to disable SIGPIPE emission on socket.
|
||||
// Other platforms do otherwise.
|
||||
use crate::syscalls::emscripten_vfs::FileHandle::{Socket, VirtualFile};
|
||||
use crate::syscalls::emscripten_vfs::{FileHandle, VirtualFd};
|
||||
#[cfg(target_os = "darwin")]
|
||||
use libc::SO_NOSIGPIPE;
|
||||
use std::ffi::c_void;
|
||||
|
||||
#[cfg(not(target_os = "darwin"))]
|
||||
const SO_NOSIGPIPE: c_int = 0;
|
||||
|
||||
/// read
|
||||
pub fn ___syscall3(ctx: &mut Ctx, _: i32, mut varargs: VarArgs) -> i32 {
|
||||
debug!("emscripten::___syscall3 (read - vfs)",);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let count: i32 = varargs.get(ctx);
|
||||
|
||||
debug!("=> fd: {}, buf_offset: {}, count: {}", fd, buf, count);
|
||||
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut u8;
|
||||
let mut buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(fd);
|
||||
let virtual_file_handle = vfs.get_virtual_file_handle(vfd).unwrap();
|
||||
|
||||
let ret = vfs
|
||||
.vfs
|
||||
.read_file(virtual_file_handle as _, &mut buf_slice)
|
||||
.unwrap();
|
||||
debug!("=> read syscall returns: {}", ret);
|
||||
ret as _
|
||||
}
|
||||
|
||||
/// write
|
||||
pub fn ___syscall4(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall4 (write - vfs) {}", _which);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let count: i32 = varargs.get(ctx);
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf);
|
||||
|
||||
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
|
||||
let vfd = VirtualFd(fd);
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
|
||||
let count: usize = match vfs.fd_map.get(&vfd) {
|
||||
Some(FileHandle::VirtualFile(handle)) => {
|
||||
vfs.vfs
|
||||
.write_file(*handle as _, buf_slice, count as _, 0)
|
||||
.unwrap();
|
||||
count as usize
|
||||
}
|
||||
Some(FileHandle::Socket(host_fd)) => unsafe {
|
||||
libc::write(*host_fd, buf_addr as _, count as _) as usize
|
||||
},
|
||||
None => panic!(),
|
||||
};
|
||||
|
||||
let string = read_string_from_wasm(ctx.memory(0), buf);
|
||||
|
||||
debug!(
|
||||
"=> fd: {} (host {}), buf: {}, count: {}\n",
|
||||
vfd.0, fd, buf, count
|
||||
);
|
||||
debug!("=> data:\n \"{}\"", string);
|
||||
count as c_int
|
||||
}
|
||||
|
||||
/// open
|
||||
pub fn ___syscall5(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall5 (open vfs) {}", _which);
|
||||
let pathname: u32 = varargs.get(ctx);
|
||||
let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
|
||||
let path_str = unsafe { std::ffi::CStr::from_ptr(pathname_addr).to_str().unwrap() };
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let fd = vfs.vfs.open_file(path_str).unwrap();
|
||||
let virtual_file_handle = FileHandle::VirtualFile(fd);
|
||||
let virtual_fd = vfs.next_lowest_fd();
|
||||
let fd = virtual_fd.0;
|
||||
assert!(
|
||||
!vfs.fd_map.contains_key(&virtual_fd),
|
||||
"Emscripten vfs should not contain file descriptor."
|
||||
);
|
||||
vfs.fd_map.insert(virtual_fd, virtual_file_handle);
|
||||
debug!("=> opening `{}` with new virtual fd: {}", path_str, fd);
|
||||
debug!("{}", path_str);
|
||||
return fd as _;
|
||||
}
|
||||
|
||||
/// close
|
||||
pub fn ___syscall6(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall6 (close vfs) {}", _which);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
debug!("closing virtual fd {}...", fd);
|
||||
|
||||
// let emscripten_data = crate::env::get_emscripten_data(ctx);
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(fd);
|
||||
|
||||
match vfs.fd_map.get(&vfd) {
|
||||
Some(VirtualFile(handle)) => {
|
||||
vfs.vfs.close(handle).unwrap();
|
||||
vfs.fd_map.remove(&vfd);
|
||||
0
|
||||
}
|
||||
Some(Socket(host_fd)) => unsafe {
|
||||
let result = libc::close(*host_fd);
|
||||
if result == 0 {
|
||||
vfs.fd_map.remove(&vfd);
|
||||
0
|
||||
} else {
|
||||
-1
|
||||
}
|
||||
},
|
||||
_ => -1,
|
||||
}
|
||||
}
|
||||
|
||||
/// chmod
|
||||
pub fn ___syscall15(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
|
||||
debug!("emscripten::___syscall15 (chmod)");
|
||||
debug!("chmod always returns 0.");
|
||||
0
|
||||
}
|
||||
|
||||
// mkdir
|
||||
pub fn ___syscall39(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall39 (mkdir vfs) {}", _which);
|
||||
let pathname: u32 = varargs.get(ctx);
|
||||
let _mode: u32 = varargs.get(ctx);
|
||||
let path = read_string_from_wasm(ctx.memory(0), pathname);
|
||||
let root = std::path::PathBuf::from("/");
|
||||
let absolute_path = root.join(&path);
|
||||
// debug!("mkdir: {}", absolute_path.display());
|
||||
let emscripten_data = crate::env::get_emscripten_data(ctx);
|
||||
let ret = if let Some(vfs) = &mut emscripten_data.vfs {
|
||||
match vfs.vfs.make_dir(&absolute_path) {
|
||||
Ok(_) => 0,
|
||||
Err(_) => -1,
|
||||
}
|
||||
} else {
|
||||
-1
|
||||
};
|
||||
// debug!("mkdir returns {}", ret);
|
||||
ret
|
||||
}
|
||||
|
||||
/// pipe
|
||||
pub fn ___syscall42(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall42 (pipe)");
|
||||
// offset to a file descriptor, which contains a read end and write end, 2 integers
|
||||
let fd_offset: u32 = varargs.get(ctx);
|
||||
|
||||
let emscripten_memory = ctx.memory(0);
|
||||
|
||||
// convert the file descriptor into a vec with two slots
|
||||
let mut fd_vec: Vec<c_int> = emscripten_memory.view()[((fd_offset / 4) as usize)..]
|
||||
.iter()
|
||||
.map(|pipe_end: &std::cell::Cell<c_int>| pipe_end.get())
|
||||
.take(2)
|
||||
.collect();
|
||||
|
||||
// get it as a mutable pointer
|
||||
let fd_ptr = fd_vec.as_mut_ptr();
|
||||
|
||||
// call pipe and store the pointers in this array
|
||||
#[cfg(target_os = "windows")]
|
||||
let result: c_int = unsafe { libc::pipe(fd_ptr, 2048, 0) };
|
||||
#[cfg(not(target_os = "windows"))]
|
||||
let result: c_int = unsafe { libc::pipe(fd_ptr) };
|
||||
result
|
||||
}
|
||||
|
||||
/// ioctl
|
||||
pub fn ___syscall54(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall54 (ioctl) {}", _which);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
let request: u32 = varargs.get(ctx);
|
||||
debug!("virtual fd: {}, op: {}", fd, request);
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(fd);
|
||||
|
||||
let host_fd = match vfs.fd_map.get(&vfd) {
|
||||
Some(Socket(host_fd)) => *host_fd,
|
||||
Some(_) => 0,
|
||||
_ => panic!("Should not ioctl on a vbox file."),
|
||||
};
|
||||
|
||||
// Got the equivalents here: https://code.woboq.org/linux/linux/include/uapi/asm-generic/ioctls.h.html
|
||||
match request as _ {
|
||||
21537 => {
|
||||
// FIONBIO
|
||||
let argp: u32 = varargs.get(ctx);
|
||||
let argp_ptr = emscripten_memory_pointer!(ctx.memory(0), argp) as *mut c_void;
|
||||
let ret = unsafe { libc::ioctl(host_fd, libc::FIONBIO, argp_ptr) };
|
||||
debug!("ret(FIONBIO): {}", ret);
|
||||
ret
|
||||
// 0
|
||||
}
|
||||
21523 => {
|
||||
// TIOCGWINSZ
|
||||
let argp: u32 = varargs.get(ctx);
|
||||
let argp_ptr = emscripten_memory_pointer!(ctx.memory(0), argp) as *mut c_void;
|
||||
let ret = unsafe { libc::ioctl(host_fd, libc::TIOCGWINSZ, argp_ptr) };
|
||||
debug!("ret(TIOCGWINSZ): {} (harcoded to 0)", ret);
|
||||
// ret
|
||||
// TODO: We hardcode the value to have emscripten tests pass, as for some reason
|
||||
// when the capturer is active, ioctl returns -1 instead of 0
|
||||
if ret == -1 {
|
||||
0
|
||||
} else {
|
||||
ret
|
||||
}
|
||||
}
|
||||
_ => {
|
||||
debug!(
|
||||
"emscripten::___syscall54 -> non implemented case {}",
|
||||
request
|
||||
);
|
||||
0
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// dup2
|
||||
pub fn ___syscall63(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall63 (dup2) {}", _which);
|
||||
|
||||
let src: i32 = varargs.get(ctx);
|
||||
let dst: i32 = varargs.get(ctx);
|
||||
|
||||
let src = VirtualFd(src);
|
||||
let dst = VirtualFd(dst);
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
|
||||
// if the src is a valid file descriptor, then continue
|
||||
if !vfs.fd_map.contains_key(&src) {
|
||||
return -1;
|
||||
}
|
||||
// if src and dst are identical, do nothing
|
||||
if src == dst {
|
||||
return 0;
|
||||
}
|
||||
// test if the destination needs to closed first, if so, close it atomically (or fake it)
|
||||
if vfs.fd_map.contains_key(&dst) {
|
||||
vfs.close(&dst);
|
||||
}
|
||||
|
||||
let dst_file_handle = match vfs.fd_map.get(&src) {
|
||||
Some(FileHandle::VirtualFile(handle)) => {
|
||||
let new_handle: i32 = vfs.vfs.duplicate_handle(handle);
|
||||
FileHandle::VirtualFile(new_handle)
|
||||
}
|
||||
Some(FileHandle::Socket(src_host_fd)) => unsafe {
|
||||
// get a dst file descriptor, or just use the underlying dup syscall
|
||||
let dst_host_fd = libc::dup(*src_host_fd);
|
||||
if dst_host_fd == -1 {
|
||||
panic!()
|
||||
}
|
||||
FileHandle::Socket(dst_host_fd)
|
||||
},
|
||||
None => panic!(),
|
||||
};
|
||||
|
||||
vfs.fd_map.insert(dst.clone(), dst_file_handle);
|
||||
|
||||
let dst = dst.0;
|
||||
|
||||
debug!("emscripten::___syscall63 (dup2) returns {}", dst);
|
||||
|
||||
dst
|
||||
}
|
||||
|
||||
/// pread
|
||||
pub fn ___syscall180(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall180 (pread) {}", _which);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let count: i32 = varargs.get(ctx);
|
||||
let offset: i32/*i64*/ = varargs.get(ctx);
|
||||
// debug!(
|
||||
// "=> fd: {}, buf_offset: {}, count: {}, offset: {}",
|
||||
// fd, buf, count, offset
|
||||
// );
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as *mut u8;
|
||||
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
|
||||
let mut buf_slice_with_offset: &mut [u8] = &mut buf_slice[(offset as usize)..];
|
||||
|
||||
// let emscripten_data = crate::env::get_emscripten_data(ctx);
|
||||
// let ret = match &mut emscripten_data.vfs {
|
||||
// Some(vfs) => vfs.vfs.read_file(fd as _, &mut buf_slice_with_offset).unwrap(),
|
||||
// None => 0,
|
||||
// };
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(fd);
|
||||
let virtual_file_handle = vfs.get_virtual_file_handle(vfd).unwrap();
|
||||
let ret = vfs
|
||||
.vfs
|
||||
.read_file(virtual_file_handle as _, &mut buf_slice_with_offset)
|
||||
.unwrap();
|
||||
|
||||
// debug!("=> pread returns: {}", ret);
|
||||
ret as _
|
||||
}
|
||||
|
||||
/// pwrite
|
||||
pub fn ___syscall181(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall181 (pwrite) {}", _which);
|
||||
let fd: i32 = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let count: u32 = varargs.get(ctx);
|
||||
let offset: i32 = varargs.get(ctx);
|
||||
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf);
|
||||
|
||||
let buf_slice = unsafe { slice::from_raw_parts_mut(buf_addr, count as _) };
|
||||
|
||||
// let emscripten_data = crate::env::get_emscripten_data(ctx);
|
||||
// let count = if let Some(vfs) = &mut emscripten_data.vfs {
|
||||
// vfs.vfs.write_file(fd as _, buf_slice, count as _, offset as _)
|
||||
// .unwrap()
|
||||
// } else {
|
||||
// 0
|
||||
// };
|
||||
|
||||
let vfd = VirtualFd(fd);
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let virtual_file_handle = vfs.get_virtual_file_handle(vfd).unwrap();
|
||||
vfs.vfs
|
||||
.write_file(virtual_file_handle as _, buf_slice, count as _, offset as _)
|
||||
.unwrap();
|
||||
|
||||
count as _
|
||||
}
|
||||
|
||||
// stat64
|
||||
#[cfg(feature = "vfs")]
|
||||
pub fn ___syscall195(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall195 (stat64) {}", _which);
|
||||
let pathname: u32 = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let path_string = read_string_from_wasm(ctx.memory(0), pathname);
|
||||
debug!("path extract for `stat` syscall: {}", &path_string);
|
||||
let path = std::path::PathBuf::from(path_string);
|
||||
|
||||
let emscripten_data = crate::env::get_emscripten_data(ctx);
|
||||
let ret = match &mut emscripten_data.vfs {
|
||||
Some(vfs) => {
|
||||
let metadata = vfs.vfs.get_path_metadata(&path).unwrap();
|
||||
let len = metadata.len();
|
||||
unsafe {
|
||||
let mut stat: stat = std::mem::zeroed();
|
||||
stat.st_size = len as _;
|
||||
debug!("stat size: {}", len);
|
||||
copy_stat_into_wasm(ctx, buf, &stat as _);
|
||||
}
|
||||
0
|
||||
}
|
||||
None => -1,
|
||||
};
|
||||
debug!("stat return: {}", ret);
|
||||
ret
|
||||
}
|
||||
|
||||
/// fstat64
|
||||
pub fn ___syscall197(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall197 (fstat64) {}", _which);
|
||||
let fd: c_int = varargs.get(ctx);
|
||||
let buf: u32 = varargs.get(ctx);
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(fd);
|
||||
let ret = match vfs.fd_map.get(&vfd) {
|
||||
Some(FileHandle::VirtualFile(internal_handle)) => {
|
||||
let metadata = vfs.vfs.get_file_metadata(internal_handle).unwrap();
|
||||
let len = metadata.len;
|
||||
let mode = if metadata.is_file {
|
||||
libc::S_IFREG
|
||||
} else {
|
||||
libc::S_IFDIR
|
||||
};
|
||||
unsafe {
|
||||
let mut stat: stat = std::mem::zeroed();
|
||||
stat.st_mode = mode as _;
|
||||
stat.st_size = len as _;
|
||||
debug!("fstat size: {}", len);
|
||||
copy_stat_into_wasm(ctx, buf, &stat as _);
|
||||
}
|
||||
0
|
||||
}
|
||||
Some(FileHandle::Socket(_host_fd)) => panic!(),
|
||||
None => -1,
|
||||
};
|
||||
debug!("fstat return: {}", ret);
|
||||
ret
|
||||
}
|
||||
|
||||
// getgid
|
||||
//pub fn ___syscall201(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
|
||||
// debug!("emscripten::___syscall201 (getgid)");
|
||||
// 0
|
||||
//}
|
||||
|
||||
// socketcall
|
||||
#[allow(clippy::cast_ptr_alignment)]
|
||||
pub fn ___syscall102(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall102 (socketcall) {}", _which);
|
||||
let call: u32 = varargs.get(ctx);
|
||||
let mut socket_varargs: VarArgs = varargs.get(ctx);
|
||||
|
||||
#[cfg(target_os = "windows")]
|
||||
type libc_sa_family_t = u16;
|
||||
#[cfg(not(target_os = "windows"))]
|
||||
type libc_sa_family_t = libc::sa_family_t;
|
||||
|
||||
#[cfg(target_os = "windows")]
|
||||
type libc_in_port_t = u16;
|
||||
#[cfg(not(target_os = "windows"))]
|
||||
type libc_in_port_t = libc::in_port_t;
|
||||
|
||||
#[cfg(target_os = "windows")]
|
||||
type libc_in_addr_t = u32;
|
||||
#[cfg(not(target_os = "windows"))]
|
||||
type libc_in_addr_t = libc::in_addr_t;
|
||||
|
||||
#[repr(C)]
|
||||
pub struct GuestSockaddrIn {
|
||||
pub sin_family: libc_sa_family_t, // u16
|
||||
pub sin_port: libc_in_port_t, // u16
|
||||
pub sin_addr: GuestInAddr, // u32
|
||||
pub sin_zero: [u8; 8], // u8 * 8
|
||||
// 2 + 2 + 4 + 8 = 16
|
||||
}
|
||||
|
||||
#[repr(C)]
|
||||
pub struct GuestInAddr {
|
||||
pub s_addr: libc_in_addr_t, // u32
|
||||
}
|
||||
|
||||
pub struct LinuxSockAddr {
|
||||
pub sa_family: u16,
|
||||
pub sa_data: [libc::c_char; 14],
|
||||
}
|
||||
|
||||
match call {
|
||||
1 => {
|
||||
debug!("socket: socket");
|
||||
// socket (domain: c_int, ty: c_int, protocol: c_int) -> c_int
|
||||
let domain: i32 = socket_varargs.get(ctx);
|
||||
let ty: i32 = socket_varargs.get(ctx);
|
||||
let protocol: i32 = socket_varargs.get(ctx);
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
|
||||
let _test_errno = errno::errno();
|
||||
|
||||
// create the host socket
|
||||
let host_fd = unsafe { libc::socket(domain, ty, protocol) };
|
||||
let vfd = vfs.new_socket_fd(host_fd);
|
||||
|
||||
debug!("--- host fd from libc::socket: {} ---", host_fd);
|
||||
debug!("--- reference fd in vfs from libc::socket: {} ---", vfd);
|
||||
|
||||
// set_cloexec
|
||||
let _ioctl_result = unsafe { libc::ioctl(host_fd, libc::FIOCLEX) };
|
||||
|
||||
use libc::{setsockopt, SOL_SOCKET};
|
||||
|
||||
let _err = errno::errno();
|
||||
|
||||
type T = u32;
|
||||
let payload = 1 as *const T as _;
|
||||
let _setsockopt_result = unsafe {
|
||||
setsockopt(
|
||||
host_fd,
|
||||
SOL_SOCKET,
|
||||
SO_NOSIGPIPE,
|
||||
payload,
|
||||
std::mem::size_of::<T>() as libc::socklen_t,
|
||||
)
|
||||
};
|
||||
|
||||
let _err2 = errno::errno();
|
||||
|
||||
debug!(
|
||||
"=> domain: {} (AF_INET/2), type: {} (SOCK_STREAM/1), protocol: {} = fd: {}",
|
||||
domain, ty, protocol, vfd
|
||||
);
|
||||
|
||||
vfd.0 as _
|
||||
}
|
||||
2 => {
|
||||
debug!("socket: bind");
|
||||
// bind (socket: c_int, address: *const sockaddr, address_len: socklen_t) -> c_int
|
||||
// TODO: Emscripten has a different signature.
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len = socket_varargs.get(ctx);
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
// Debug received address
|
||||
let _proper_address = address as *const GuestSockaddrIn;
|
||||
let _other_proper_address = address as *const libc::sockaddr;
|
||||
unsafe {
|
||||
debug!(
|
||||
"=> address.sin_family: {:?}, address.sin_port: {:?}, address.sin_addr.s_addr: {:?}",
|
||||
(*_proper_address).sin_family, (*_proper_address).sin_port, (*_proper_address).sin_addr.s_addr
|
||||
);
|
||||
}
|
||||
let status = unsafe { libc::bind(host_socket_fd as _, address, address_len) };
|
||||
// debug!("=> status: {}", status);
|
||||
debug!(
|
||||
"=> socketfd: {}, address: {:?}, address_len: {} = status: {}",
|
||||
socket, address, address_len, status
|
||||
);
|
||||
status
|
||||
// -1
|
||||
}
|
||||
3 => {
|
||||
debug!("socket: connect");
|
||||
// connect (socket: c_int, address: *const sockaddr, len: socklen_t) -> c_int
|
||||
// TODO: Emscripten has a different signature.
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len = socket_varargs.get(ctx);
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
unsafe { libc::connect(host_socket_fd as _, address, address_len) }
|
||||
}
|
||||
4 => {
|
||||
debug!("socket: listen");
|
||||
// listen (socket: c_int, backlog: c_int) -> c_int
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let backlog: i32 = socket_varargs.get(ctx);
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
let status = unsafe { libc::listen(host_socket_fd, backlog) };
|
||||
debug!(
|
||||
"=> socketfd: {}, backlog: {} = status: {}",
|
||||
socket, backlog, status
|
||||
);
|
||||
status
|
||||
}
|
||||
5 => {
|
||||
debug!("socket: accept");
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let address_addr: u32 = socket_varargs.get(ctx);
|
||||
let address_len: u32 = socket_varargs.get(ctx);
|
||||
let address =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_addr) as *mut libc::sockaddr;
|
||||
let address_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut libc::socklen_t;
|
||||
|
||||
let host_socket_fd = {
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
host_socket_fd
|
||||
};
|
||||
|
||||
debug!(
|
||||
"=> socket: {}(host {}), address: {:?}, address_len: {}",
|
||||
socket, host_socket_fd, address, address_len
|
||||
);
|
||||
|
||||
let new_accept_host_fd =
|
||||
unsafe { libc::accept(host_socket_fd, address, address_len_addr) };
|
||||
|
||||
unsafe {
|
||||
let address_linux =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_addr) as *mut LinuxSockAddr;
|
||||
(*address_linux).sa_family = (*address).sa_family as u16;
|
||||
(*address_linux).sa_data = (*address).sa_data;
|
||||
};
|
||||
|
||||
// set_cloexec
|
||||
let _ioctl_result = unsafe { libc::ioctl(new_accept_host_fd, libc::FIOCLEX) };
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let new_vfd = vfs.new_socket_fd(new_accept_host_fd);
|
||||
|
||||
debug!("new accept fd: {}(host {})", new_vfd.0, new_accept_host_fd);
|
||||
|
||||
new_vfd.0 as _
|
||||
}
|
||||
6 => {
|
||||
debug!("socket: getsockname");
|
||||
// getsockname (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len: u32 = socket_varargs.get(ctx);
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
|
||||
let address_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut libc::socklen_t;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
unsafe { libc::getsockname(host_socket_fd as _, address, address_len_addr) }
|
||||
}
|
||||
7 => {
|
||||
debug!("socket: getpeername");
|
||||
// getpeername (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len: u32 = socket_varargs.get(ctx);
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
|
||||
let address_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut libc::socklen_t;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
unsafe { libc::getpeername(host_socket_fd as _, address, address_len_addr) }
|
||||
}
|
||||
11 => {
|
||||
debug!("socket: sendto");
|
||||
// sendto (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let buf: u32 = socket_varargs.get(ctx);
|
||||
let flags = socket_varargs.get(ctx);
|
||||
let len: i32 = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len = socket_varargs.get(ctx);
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
unsafe {
|
||||
libc::sendto(
|
||||
host_socket_fd as _,
|
||||
buf_addr,
|
||||
flags,
|
||||
len,
|
||||
address,
|
||||
address_len,
|
||||
) as i32
|
||||
}
|
||||
}
|
||||
12 => {
|
||||
debug!("socket: recvfrom");
|
||||
// recvfrom (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let buf: u32 = socket_varargs.get(ctx);
|
||||
let len: i32 = socket_varargs.get(ctx);
|
||||
let flags = socket_varargs.get(ctx);
|
||||
let address: u32 = socket_varargs.get(ctx);
|
||||
let address_len: u32 = socket_varargs.get(ctx);
|
||||
let buf_addr = emscripten_memory_pointer!(ctx.memory(0), buf) as _;
|
||||
let address = emscripten_memory_pointer!(ctx.memory(0), address) as *mut libc::sockaddr;
|
||||
let address_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), address_len) as *mut libc::socklen_t;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
unsafe {
|
||||
libc::recvfrom(
|
||||
host_socket_fd,
|
||||
buf_addr,
|
||||
flags,
|
||||
len,
|
||||
address,
|
||||
address_len_addr,
|
||||
) as i32
|
||||
}
|
||||
}
|
||||
14 => {
|
||||
debug!("socket: setsockopt");
|
||||
// NOTE: Emscripten seems to be passing the wrong values to this syscall
|
||||
// level: Em passes 1 as SOL_SOCKET; SOL_SOCKET is 0xffff in BSD
|
||||
// name: Em passes SO_ACCEPTCONN, but Nginx complains about REUSEADDR
|
||||
// https://github.com/openbsd/src/blob/master/sys/sys/socket.h#L156
|
||||
// setsockopt (socket: c_int, level: c_int, name: c_int, value: *const c_void, option_len: socklen_t) -> c_int
|
||||
|
||||
let socket = socket_varargs.get(ctx);
|
||||
// SOL_SOCKET = 0xffff (BSD, Linux)
|
||||
let level: i32 = libc::SOL_SOCKET;
|
||||
// SO_REUSEADDR = 0x4 (BSD, Linux)
|
||||
let name: i32 = libc::SO_REUSEADDR;
|
||||
let _: u32 = socket_varargs.get(ctx);
|
||||
let value: u32 = socket_varargs.get(ctx);
|
||||
let option_len = socket_varargs.get(ctx);
|
||||
let value_addr = emscripten_memory_pointer!(ctx.memory(0), value) as _; // Endian problem
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
let ret = unsafe {
|
||||
libc::setsockopt(host_socket_fd as _, level, name, value_addr, option_len)
|
||||
};
|
||||
|
||||
debug!("=> socketfd: {}, level: {} (SOL_SOCKET/0xffff), name: {} (SO_REUSEADDR/4), value_addr: {:?}, option_len: {} = status: {}", socket, level, name, value_addr, option_len, ret);
|
||||
ret
|
||||
}
|
||||
15 => {
|
||||
debug!("socket: getsockopt");
|
||||
// getsockopt (sockfd: c_int, level: c_int, optname: c_int, optval: *mut c_void, optlen: *mut socklen_t) -> c_int
|
||||
use libc::socklen_t;
|
||||
let socket = socket_varargs.get(ctx);
|
||||
let level: i32 = socket_varargs.get(ctx);
|
||||
let name: i32 = socket_varargs.get(ctx);
|
||||
let value: u32 = socket_varargs.get(ctx);
|
||||
let option_len: u32 = socket_varargs.get(ctx);
|
||||
let value_addr = emscripten_memory_pointer!(ctx.memory(0), value) as _;
|
||||
let option_len_addr =
|
||||
emscripten_memory_pointer!(ctx.memory(0), option_len) as *mut socklen_t;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
let result = unsafe {
|
||||
libc::getsockopt(host_socket_fd, level, name, value_addr, option_len_addr)
|
||||
};
|
||||
|
||||
if result == -1 {
|
||||
let err = errno::errno();
|
||||
debug!("socket: getsockopt -- error -- {}", err);
|
||||
}
|
||||
|
||||
result
|
||||
}
|
||||
16 => {
|
||||
debug!("socket: sendmsg");
|
||||
// sendmsg (fd: c_int, msg: *const msghdr, flags: c_int) -> ssize_t
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let msg: u32 = socket_varargs.get(ctx);
|
||||
let flags: i32 = socket_varargs.get(ctx);
|
||||
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *const libc::msghdr;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
unsafe { libc::sendmsg(host_socket_fd as _, msg_addr, flags) as i32 }
|
||||
}
|
||||
17 => {
|
||||
debug!("socket: recvmsg");
|
||||
// recvmsg (fd: c_int, msg: *mut msghdr, flags: c_int) -> ssize_t
|
||||
let socket: i32 = socket_varargs.get(ctx);
|
||||
let msg: u32 = socket_varargs.get(ctx);
|
||||
let flags: i32 = socket_varargs.get(ctx);
|
||||
let msg_addr = emscripten_memory_pointer!(ctx.memory(0), msg) as *mut libc::msghdr;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
let vfd = VirtualFd(socket);
|
||||
let host_socket_fd = vfs.get_host_socket_fd(&vfd).unwrap();
|
||||
|
||||
unsafe { libc::recvmsg(host_socket_fd as _, msg_addr, flags) as i32 }
|
||||
}
|
||||
_ => {
|
||||
// others
|
||||
-1
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// select
|
||||
#[allow(clippy::cast_ptr_alignment)]
|
||||
pub fn ___syscall142(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall142 (newselect) {}", _which);
|
||||
|
||||
let nfds: i32 = varargs.get(ctx);
|
||||
let readfds: u32 = varargs.get(ctx);
|
||||
let writefds: u32 = varargs.get(ctx);
|
||||
let _exceptfds: u32 = varargs.get(ctx);
|
||||
let timeout: i32 = varargs.get(ctx);
|
||||
|
||||
assert!(nfds <= 64, "`nfds` must be less than or equal to 64");
|
||||
// assert_eq!(exceptfds, 0, "`exceptfds` is not supporrted");
|
||||
|
||||
let readfds_set_ptr = emscripten_memory_pointer!(ctx.memory(0), readfds) as *mut _;
|
||||
let readfds_set_u8_ptr = readfds_set_ptr as *mut u8;
|
||||
let writefds_set_ptr = emscripten_memory_pointer!(ctx.memory(0), writefds) as *mut _;
|
||||
let writefds_set_u8_ptr = writefds_set_ptr as *mut u8;
|
||||
|
||||
let nfds = nfds as _;
|
||||
let readfds_slice = unsafe { slice::from_raw_parts_mut(readfds_set_u8_ptr, nfds) };
|
||||
let _writefds_slice = unsafe { slice::from_raw_parts_mut(writefds_set_u8_ptr, nfds) };
|
||||
|
||||
use bit_field::BitArray;
|
||||
|
||||
let vfs = crate::env::get_emscripten_data(ctx).vfs.as_mut().unwrap();
|
||||
|
||||
let mut file_descriptors_to_watch = vec![];
|
||||
for virtual_fd in 0..nfds {
|
||||
let bit_flag = readfds_slice.get_bit(virtual_fd as usize);
|
||||
if !bit_flag {
|
||||
continue;
|
||||
}
|
||||
file_descriptors_to_watch.push(virtual_fd);
|
||||
}
|
||||
|
||||
let mut count = 0;
|
||||
let mut max = -1;
|
||||
|
||||
let mut read_mappings = vec![];
|
||||
|
||||
for virtual_fd in 0..nfds {
|
||||
let bit_flag = readfds_slice.get_bit(virtual_fd);
|
||||
if !bit_flag {
|
||||
continue;
|
||||
}
|
||||
let virtual_file = vfs.fd_map.get(&VirtualFd(virtual_fd as _));
|
||||
match virtual_file {
|
||||
Some(FileHandle::VirtualFile(_fd)) => {
|
||||
count = count + 1;
|
||||
}
|
||||
Some(FileHandle::Socket(host_fd)) => {
|
||||
count = count + 1;
|
||||
let virtual_fd = virtual_fd as i32;
|
||||
let fd = *host_fd;
|
||||
if fd > max {
|
||||
max = fd;
|
||||
}
|
||||
read_mappings.push((virtual_fd, fd));
|
||||
}
|
||||
None => {}
|
||||
};
|
||||
}
|
||||
|
||||
for mapping in read_mappings.clone() {
|
||||
let (virtual_fd, fd) = mapping;
|
||||
unsafe {
|
||||
libc::FD_CLR(virtual_fd, readfds_set_ptr);
|
||||
libc::FD_SET(fd, readfds_set_ptr);
|
||||
}
|
||||
}
|
||||
|
||||
// #[repr(C)]
|
||||
// pub struct timeval {
|
||||
// pub tv_sec: libc::c_long, // time t
|
||||
// pub tv_usec: libc::c_long, // long int
|
||||
// }
|
||||
|
||||
let timeval_ptr = emscripten_memory_pointer!(ctx.memory(0), timeout) as *mut libc::timeval;
|
||||
let mut tval = unsafe {
|
||||
libc::timeval {
|
||||
tv_sec: (*timeval_ptr).tv_sec,
|
||||
tv_usec: (*timeval_ptr).tv_usec,
|
||||
}
|
||||
};
|
||||
let _tval_ptr: *mut libc::timeval = &mut tval;
|
||||
|
||||
let sz = max as i32 + 1;
|
||||
// let result = unsafe { libc::select(sz, readfds_set_ptr, writefds_set_ptr, 0 as _, timeval_ptr as *mut libc::timeval) };
|
||||
let result = unsafe { libc::select(sz, readfds_set_ptr, writefds_set_ptr, 0 as _, 0 as _) };
|
||||
|
||||
assert!(nfds <= 64, "`nfds` must be less than or equal to 64");
|
||||
// assert!(exceptfds == 0, "`exceptfds` is not supporrted");
|
||||
|
||||
let err = errno::errno();
|
||||
debug!("gah again: {}", err);
|
||||
|
||||
// let len = read_mappings.len();
|
||||
|
||||
for mapping in read_mappings {
|
||||
let (virtual_fd, fd) = mapping;
|
||||
unsafe {
|
||||
libc::FD_CLR(fd, readfds_set_ptr);
|
||||
libc::FD_SET(virtual_fd, readfds_set_ptr);
|
||||
}
|
||||
}
|
||||
|
||||
for input in file_descriptors_to_watch {
|
||||
unsafe {
|
||||
let in_set = libc::FD_ISSET(input as _, readfds_set_ptr);
|
||||
assert!(in_set);
|
||||
}
|
||||
}
|
||||
|
||||
result
|
||||
}
|
||||
|
||||
// chown
|
||||
pub fn ___syscall212(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_int {
|
||||
debug!("emscripten::___syscall212 (chown) {}", _which);
|
||||
let _pathname: u32 = varargs.get(ctx);
|
||||
let _owner: u32 = varargs.get(ctx);
|
||||
let _group: u32 = varargs.get(ctx);
|
||||
debug!("syscall `chown` always returns 0");
|
||||
0
|
||||
}
|
||||
Reference in New Issue
Block a user