mirror of
https://github.com/fluencelabs/wasmer
synced 2025-05-23 15:41:19 +00:00
620 lines
21 KiB
Rust
620 lines
21 KiB
Rust
use super::utils::copy_stat_into_wasm;
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use super::varargs::VarArgs;
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use crate::webassembly::Instance;
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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,
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bind,
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c_int,
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c_void,
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chown,
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// fcntl, ioctl, setsockopt, getppid
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close,
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connect,
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exit,
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fstat,
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getgid,
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getpeername,
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getpid,
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getsockname,
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getsockopt,
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gid_t,
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iovec,
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listen,
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lseek,
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mkdir,
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msghdr,
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off_t,
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open,
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pid_t,
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pread,
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pwrite,
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read,
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readv,
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recvfrom,
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recvmsg,
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sendmsg,
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sendto,
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sockaddr,
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socket,
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socklen_t,
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ssize_t,
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stat,
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uname,
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utsname,
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write,
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writev,
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setsockopt,
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dup2,
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};
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/// exit
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pub extern "C" fn ___syscall1(_which: c_int, mut varargs: VarArgs, instance: &mut Instance) {
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debug!("emscripten::___syscall1 (exit)");
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let status: i32 = varargs.get(instance);
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unsafe {
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exit(status);
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}
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}
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/// read
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pub extern "C" fn ___syscall3(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> ssize_t {
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debug!("emscripten::___syscall3 (read)");
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let fd: i32 = varargs.get(instance);
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let buf: u32 = varargs.get(instance);
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let count: usize = varargs.get(instance);
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debug!("=> fd: {}, buf_offset: {}, count: {}", fd, buf, count);
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let buf_addr = instance.memory_offset_addr(0, buf as usize) as *mut c_void;
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unsafe { read(fd, buf_addr, count) }
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}
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/// write
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pub extern "C" fn ___syscall4(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall4 (write)");
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let fd: i32 = varargs.get(instance);
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let buf: u32 = varargs.get(instance);
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let count: u32 = varargs.get(instance);
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debug!("=> fd: {}, buf: {}, count: {}", fd, buf, count);
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let buf_addr = instance.memory_offset_addr(0, buf as usize) as *const c_void;
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unsafe { write(fd, buf_addr, count as usize) as i32 }
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}
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/// open
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pub extern "C" fn ___syscall5(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall5 (open)");
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let pathname: u32 = varargs.get(instance);
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let flags: i32 = varargs.get(instance);
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let mode: u32 = varargs.get(instance);
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let pathname_addr = instance.memory_offset_addr(0, pathname as usize) 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 { open(pathname_addr, flags, mode) };
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debug!("=> pathname: {}, flags: {}, mode: {} = fd: {}\npath: {}", pathname, flags, mode, fd, path_str);
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fd
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}
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/// close
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pub extern "C" fn ___syscall6(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall6 (close)");
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let fd: i32 = varargs.get(instance);
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debug!("fd: {}", fd);
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unsafe { close(fd) }
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}
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// chdir
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pub extern "C" fn ___syscall12(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall12 (chdir)");
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let path_addr: i32 = varargs.get(instance);
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let path = unsafe {
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let path_ptr = instance.memory_offset_addr(0, path_addr as usize) as *const i8;
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let path = std::ffi::CStr::from_ptr(path_ptr).to_str().unwrap();
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debug!("=> path: {}", path);
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path
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};
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0
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}
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// getpid
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pub extern "C" fn ___syscall20() -> pid_t {
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debug!("emscripten::___syscall20 (getpid)");
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unsafe { getpid() }
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}
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// mkdir
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pub extern "C" fn ___syscall39(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall39 (mkdir)");
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let pathname: u32 = varargs.get(instance);
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let mode: u32 = varargs.get(instance);
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let pathname_addr = instance.memory_offset_addr(0, pathname as usize) as *const i8;
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unsafe { mkdir(pathname_addr, mode as _) };
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0
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}
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// getppid
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pub extern "C" fn ___syscall64() -> pid_t {
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debug!("emscripten::___syscall64 (getppid)");
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unsafe { getpid() }
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}
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/// ioctl
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pub extern "C" fn ___syscall54(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall54 (ioctl)");
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let _fd: i32 = varargs.get(instance);
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let _request: u32 = varargs.get(instance);
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// debug!("fd: {}, op: {}", fd, request);
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// unsafe { ioctl(fd, request as _) }
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0
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}
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use std::mem::size_of;
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// socketcall
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pub extern "C" fn ___syscall102(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall102 (socketcall)");
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let call: u32 = varargs.get(instance);
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let mut socket_varargs: VarArgs = varargs.get(instance);
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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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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(instance);
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let ty: i32 = socket_varargs.get(instance);
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let protocol: i32 = socket_varargs.get(instance);
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let socket = unsafe { socket(domain, ty, protocol) };
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debug!("=> domain: {} (AF_INET/2), type: {} (SOCK_STREAM/1), protocol: {} = fd: {}", domain, ty, protocol, socket);
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socket
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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: i32 = socket_varargs.get(instance);
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let address: u32 = socket_varargs.get(instance);
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let address_len: u32 = socket_varargs.get(instance);
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let address = instance.memory_offset_addr(0, address as usize) as *mut sockaddr;
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let status = unsafe { bind(socket, address, address_len) };
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debug!("=> socketfd: {}, address: {:?}, address_len: {} = status: {}", socket, address, address_len, status);
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status
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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: i32 = socket_varargs.get(instance);
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let address: u32 = socket_varargs.get(instance);
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let address_len: u32 = socket_varargs.get(instance);
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let address = instance.memory_offset_addr(0, address as usize) 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: i32 = socket_varargs.get(instance);
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let backlog: i32 = socket_varargs.get(instance);
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let status = unsafe { listen(socket, backlog) };
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debug!("=> socketfd: {}, backlog: {} = status: {}", socket, backlog, status);
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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: i32 = socket_varargs.get(instance);
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let address: u32 = socket_varargs.get(instance);
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let address_len: u32 = socket_varargs.get(instance);
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let address = instance.memory_offset_addr(0, address as usize) as *mut sockaddr;
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let address_len_addr =
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instance.memory_offset_addr(0, address_len as usize) as *mut socklen_t;
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unsafe { accept(socket, address, address_len_addr) }
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}
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6 => {
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debug!("socket: getsockname");
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// getsockname (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
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let socket: i32 = socket_varargs.get(instance);
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let address: u32 = socket_varargs.get(instance);
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let address_len: u32 = socket_varargs.get(instance);
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let address = instance.memory_offset_addr(0, address as usize) as *mut sockaddr;
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let address_len_addr =
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instance.memory_offset_addr(0, address_len as usize) as *mut socklen_t;
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unsafe { getsockname(socket, address, address_len_addr) }
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}
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7 => {
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debug!("socket: getpeername");
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// getpeername (socket: c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> c_int
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let socket: i32 = socket_varargs.get(instance);
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let address: u32 = socket_varargs.get(instance);
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let address_len: u32 = socket_varargs.get(instance);
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let address = instance.memory_offset_addr(0, address as usize) as *mut sockaddr;
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let address_len_addr =
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instance.memory_offset_addr(0, address_len as usize) as *mut socklen_t;
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unsafe { getpeername(socket, address, address_len_addr) }
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}
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11 => {
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debug!("socket: sendto");
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// sendto (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
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let socket: i32 = socket_varargs.get(instance);
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let buf: u32 = socket_varargs.get(instance);
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let flags: usize = socket_varargs.get(instance);
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let len: i32 = socket_varargs.get(instance);
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let address: u32 = socket_varargs.get(instance);
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let address_len: u32 = socket_varargs.get(instance);
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let buf_addr = instance.memory_offset_addr(0, buf as usize) as *mut c_void;
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let address = instance.memory_offset_addr(0, address as usize) as *mut sockaddr;
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unsafe { sendto(socket, buf_addr, flags, len, address, address_len) as i32 }
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}
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12 => {
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debug!("socket: recvfrom");
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// recvfrom (socket: c_int, buf: *const c_void, len: size_t, flags: c_int, addr: *const sockaddr, addrlen: socklen_t) -> ssize_t
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let socket: i32 = socket_varargs.get(instance);
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let buf: u32 = socket_varargs.get(instance);
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let flags: usize = socket_varargs.get(instance);
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let len: i32 = socket_varargs.get(instance);
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let address: u32 = socket_varargs.get(instance);
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let address_len: u32 = socket_varargs.get(instance);
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let buf_addr = instance.memory_offset_addr(0, buf as usize) as *mut c_void;
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let address = instance.memory_offset_addr(0, address as usize) as *mut sockaddr;
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let address_len_addr =
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instance.memory_offset_addr(0, address_len as usize) as *mut socklen_t;
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unsafe { recvfrom(socket, buf_addr, flags, len, address, address_len_addr) as i32 }
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}
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14 => {
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debug!("socket: setsockopt");
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// NOTE: Emscripten seems to be passing the wrong values to this syscall
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// level: Em passes 1 as SOL_SOCKET; SOL_SOCKET is 0xffff in BSD
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// name: Em passes SO_ACCEPTCONN, but Nginx complains about REUSEADDR
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// https://github.com/openbsd/src/blob/master/sys/sys/socket.h#L156
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// setsockopt (socket: c_int, level: c_int, name: c_int, value: *const c_void, option_len: socklen_t) -> c_int
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let socket: i32 = socket_varargs.get(instance);
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// SOL_SOCKET = 0xffff in BSD
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let level: i32 = 0xffff; let _: u32 = socket_varargs.get(instance);
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// SO_ACCEPTCONN = 0x4
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let name: i32 = 0x4; let _: u32 = socket_varargs.get(instance);
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let value: u32 = socket_varargs.get(instance);
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let option_len: u32 = socket_varargs.get(instance);
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let value_addr = instance.memory_offset_addr(0, value as usize) as *mut c_void; // Endian problem
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let ret = unsafe { setsockopt(socket, level, name, value_addr, option_len) };
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// debug!("option_value = {:?}", unsafe { *(value_addr as *const u32) });
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debug!("=> socketfd: {}, level: {} (SOL_SOCKET/0xffff), name: {} (SO_REUSEADDR/4), value_addr: {:?}, option_len: {} = status: {}", socket, level, name, value_addr, option_len, ret);
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ret
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}
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15 => {
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debug!("socket: getsockopt");
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// getsockopt (sockfd: c_int, level: c_int, optname: c_int, optval: *mut c_void, optlen: *mut socklen_t) -> c_int
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let socket: i32 = socket_varargs.get(instance);
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let level: i32 = socket_varargs.get(instance);
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let name: i32 = socket_varargs.get(instance);
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let value: u32 = socket_varargs.get(instance);
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let option_len: u32 = socket_varargs.get(instance);
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let value_addr = instance.memory_offset_addr(0, value as usize) as *mut c_void;
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let option_len_addr =
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instance.memory_offset_addr(0, option_len as usize) as *mut socklen_t;
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unsafe { getsockopt(socket, level, name, value_addr, option_len_addr) }
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}
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16 => {
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debug!("socket: sendmsg");
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// sendmsg (fd: c_int, msg: *const msghdr, flags: c_int) -> ssize_t
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let socket: i32 = socket_varargs.get(instance);
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let msg: u32 = socket_varargs.get(instance);
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let flags: i32 = socket_varargs.get(instance);
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let msg_addr = instance.memory_offset_addr(0, msg as usize) as *const msghdr;
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unsafe { sendmsg(socket, msg_addr, flags) as i32 }
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}
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17 => {
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debug!("socket: recvmsg");
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// recvmsg (fd: c_int, msg: *mut msghdr, flags: c_int) -> ssize_t
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let socket: i32 = socket_varargs.get(instance);
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let msg: u32 = socket_varargs.get(instance);
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let flags: i32 = socket_varargs.get(instance);
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let msg_addr = instance.memory_offset_addr(0, msg as usize) as *mut msghdr;
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unsafe { recvmsg(socket, msg_addr, flags) as i32 }
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}
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_ => {
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// others
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-1
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}
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}
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}
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/// uname
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// NOTE: Wondering if we should return custom utsname, like Emscripten.
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pub extern "C" fn ___syscall122(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall122");
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let buf: u32 = varargs.get(instance);
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debug!("=> buf: {}", buf);
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let buf_addr = instance.memory_offset_addr(0, buf as usize) as *mut utsname;
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unsafe { uname(buf_addr) }
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}
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// mmap2
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pub extern "C" fn ___syscall192(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> c_int {
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debug!("emscripten::___syscall192 (mmap2)");
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let addr: i32 = varargs.get(instance);
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let len: i32 = varargs.get(instance);
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let prot: i32 = varargs.get(instance);
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let flags: i32 = varargs.get(instance);
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let fd: i32 = varargs.get(instance);
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let off: i32 = varargs.get(instance);
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debug!("=> addr: {}, len: {}, prot: {}, flags: {}, fd: {}, off: {}", addr, len, prot, flags, fd, off);
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0
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}
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/// lseek
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pub extern "C" fn ___syscall140(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> off_t {
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debug!("emscripten::___syscall145 (lseek)");
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let fd: i32 = varargs.get(instance);
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let offset: i64 = varargs.get(instance);
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let whence: i32 = varargs.get(instance);
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debug!("=> fd: {}, offset: {}, whence = {}", fd, offset, whence);
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unsafe { lseek(fd, offset, whence) }
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}
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/// readv
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pub extern "C" fn ___syscall145(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> ssize_t {
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debug!("emscripten::___syscall145 (readv)");
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let fd: i32 = varargs.get(instance);
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let iov: u32 = varargs.get(instance);
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let iovcnt: i32 = varargs.get(instance);
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debug!("=> fd: {}, iov: {}, iovcnt = {}", fd, iov, iovcnt);
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let iov_addr = instance.memory_offset_addr(0, iov as usize) as *mut iovec;
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unsafe { readv(fd, iov_addr, iovcnt) }
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}
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// writev
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pub extern "C" fn ___syscall146(
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_which: c_int,
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mut varargs: VarArgs,
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instance: &mut Instance,
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) -> ssize_t {
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debug!("emscripten::___syscall145 (writev)");
|
|
let fd: i32 = varargs.get(instance);
|
|
let iov: u32 = varargs.get(instance);
|
|
let iovcnt: i32 = varargs.get(instance);
|
|
debug!("=> fd: {}, iov: {}, iovcnt = {}", fd, iov, iovcnt);
|
|
let iov_addr = instance.memory_offset_addr(0, iov as usize) as *mut iovec;
|
|
unsafe { writev(fd, iov_addr, iovcnt) }
|
|
}
|
|
|
|
// pread
|
|
pub extern "C" fn ___syscall180(
|
|
_which: c_int,
|
|
mut varargs: VarArgs,
|
|
instance: &mut Instance,
|
|
) -> c_int {
|
|
debug!("emscripten::___syscall180 (pread)");
|
|
let fd: i32 = varargs.get(instance);
|
|
let buf: u32 = varargs.get(instance);
|
|
let count: u32 = varargs.get(instance);
|
|
{
|
|
let zero: u32 = varargs.get(instance);
|
|
assert_eq!(zero, 0);
|
|
}
|
|
let offset: i64 = varargs.get(instance);
|
|
|
|
let buf_ptr = instance.memory_offset_addr(0, buf as _) as _;
|
|
|
|
unsafe { pread(fd, buf_ptr, count as _, offset) as _ }
|
|
}
|
|
|
|
// pwrite
|
|
pub extern "C" fn ___syscall181(
|
|
_which: c_int,
|
|
mut varargs: VarArgs,
|
|
instance: &mut Instance,
|
|
) -> c_int {
|
|
debug!("emscripten::___syscall181 (pwrite)");
|
|
let fd: i32 = varargs.get(instance);
|
|
let buf: u32 = varargs.get(instance);
|
|
let count: u32 = varargs.get(instance);
|
|
{
|
|
let zero: u32 = varargs.get(instance);
|
|
assert_eq!(zero, 0);
|
|
}
|
|
let offset: i64 = varargs.get(instance);
|
|
|
|
let buf_ptr = instance.memory_offset_addr(0, buf as _) as _;
|
|
let status = unsafe { pwrite(fd, buf_ptr, count as _, offset) as _ };
|
|
debug!("=> fd: {}, buf: {}, count: {}, offset: {} = status:{}", fd, buf, count, offset, status);
|
|
status
|
|
}
|
|
|
|
// stat64
|
|
pub extern "C" fn ___syscall195(
|
|
_which: c_int,
|
|
mut varargs: VarArgs,
|
|
instance: &mut Instance,
|
|
) -> c_int {
|
|
debug!("emscripten::___syscall195 (stat64)");
|
|
let pathname: u32 = varargs.get(instance);
|
|
let buf: u32 = varargs.get(instance);
|
|
|
|
let pathname_addr = instance.memory_offset_addr(0, pathname as usize) as *const i8;
|
|
|
|
unsafe {
|
|
let mut _stat: stat = std::mem::zeroed();
|
|
let ret = stat(pathname_addr, &mut _stat);
|
|
debug!("ret: {}", ret);
|
|
if ret != 0 {
|
|
return ret;
|
|
}
|
|
copy_stat_into_wasm(instance, buf, &_stat);
|
|
}
|
|
0
|
|
}
|
|
|
|
// fstat64
|
|
pub extern "C" fn ___syscall197(
|
|
_which: c_int,
|
|
mut varargs: VarArgs,
|
|
instance: &mut Instance,
|
|
) -> c_int {
|
|
debug!("emscripten::___syscall197 (fstat64)");
|
|
let fd: c_int = varargs.get(instance);
|
|
let buf: u32 = varargs.get(instance);
|
|
|
|
unsafe {
|
|
let mut stat = std::mem::zeroed();
|
|
let ret = fstat(fd, &mut stat);
|
|
debug!("ret: {}", ret);
|
|
if ret != 0 {
|
|
return ret;
|
|
}
|
|
copy_stat_into_wasm(instance, buf, &stat);
|
|
}
|
|
|
|
0
|
|
}
|
|
|
|
// /// fcntl64
|
|
// pub extern "C" fn ___syscall221(_which: c_int, mut varargs: VarArgs, instance: &mut Instance) -> c_int {
|
|
// debug!("emscripten::___syscall221");
|
|
// let fd: i32 = varargs.get(instance);
|
|
// let cmd: i32 = varargs.get(instance);
|
|
// debug!("fd: {}, cmd: {}", fd, cmd);
|
|
// unsafe { fcntl(fd, cmd) }
|
|
// }
|
|
|
|
// getgid
|
|
pub extern "C" fn ___syscall201() -> gid_t {
|
|
debug!("emscripten::___syscall201 (getgid)");
|
|
unsafe {
|
|
// Maybe fix: Emscripten returns 0 always
|
|
getgid()
|
|
}
|
|
}
|
|
|
|
// getgid32
|
|
pub extern "C" fn ___syscall202() -> gid_t {
|
|
debug!("emscripten::___syscall202 (getgid32)");
|
|
unsafe {
|
|
// Maybe fix: Emscripten returns 0 always
|
|
getgid()
|
|
}
|
|
}
|
|
|
|
|
|
// chown
|
|
pub extern "C" fn ___syscall212(
|
|
_which: c_int,
|
|
mut varargs: VarArgs,
|
|
instance: &mut Instance,
|
|
) -> c_int {
|
|
debug!("emscripten::___syscall212 (chown)");
|
|
|
|
let pathname: u32 = varargs.get(instance);
|
|
let owner: u32 = varargs.get(instance);
|
|
let group: u32 = varargs.get(instance);
|
|
|
|
let pathname_addr = instance.memory_offset_addr(0, pathname as usize) as *const i8;
|
|
|
|
unsafe { chown(pathname_addr, owner, group) }
|
|
}
|
|
|
|
// fcntl64
|
|
pub extern "C" fn ___syscall221(
|
|
_which: c_int,
|
|
mut varargs: VarArgs,
|
|
instance: &mut Instance,
|
|
) -> c_int { // fcntl64
|
|
let _fd: i32 = varargs.get(instance);
|
|
let cmd: u32 = varargs.get(instance);
|
|
match cmd {
|
|
2 => 0,
|
|
_ => -1,
|
|
}
|
|
}
|
|
|
|
// prlimit64
|
|
pub extern "C" fn ___syscall340(
|
|
_which: c_int,
|
|
mut _varargs: VarArgs,
|
|
_instance: &mut Instance,
|
|
) -> c_int {
|
|
debug!("emscripten::___syscall340 (prlimit64)");
|
|
// NOTE: Doesn't really matter. Wasm modules cannot exceed WASM_PAGE_SIZE anyway.
|
|
0
|
|
}
|
|
|
|
// dup2
|
|
pub extern "C" fn ___syscall63(
|
|
_which: c_int,
|
|
mut varargs: VarArgs,
|
|
instance: &mut Instance,
|
|
) -> c_int {
|
|
debug!("emscripten::___syscall63 (dup2)");
|
|
|
|
let src: i32 = varargs.get(instance);
|
|
let dst: i32 = varargs.get(instance);
|
|
|
|
unsafe {
|
|
dup2(src, dst)
|
|
}
|
|
}
|