Merge pull request #2726 from sisungo/master

Change `os.rs` to build on musl libc

vm/src/stdlib/os.rs

@@ -1563,8 +1563,12 @@ mod _os {
 
         // Safety: p_offset_src and p_offset_dst is a unique pointer for offset_src and offset_dst respectively,
         // and will only be freed after this function ends.
+        //
+        // Why not use `libc::copy_file_range`: On `musl-libc`, `libc::copy_file_range` is not provided. Therefore
+        // we use syscalls directly instead.
         let ret = unsafe {
-            libc::copy_file_range(
+            libc::syscall(
+                libc::SYS_copy_file_range,
                 args.src,
                 p_offset_src as *mut i64,
                 args.dst,