miri/shims/unix/android/
foreign_items.rs

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1use rustc_middle::ty::Ty;
2use rustc_span::Symbol;
3use rustc_target::callconv::{Conv, FnAbi};
4
5use crate::shims::unix::android::thread::prctl;
6use crate::shims::unix::linux_like::epoll::EvalContextExt as _;
7use crate::shims::unix::linux_like::eventfd::EvalContextExt as _;
8use crate::shims::unix::linux_like::syscall::syscall;
9use crate::*;
10
11pub fn is_dyn_sym(_name: &str) -> bool {
12    false
13}
14
15impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
16pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
17    fn emulate_foreign_item_inner(
18        &mut self,
19        link_name: Symbol,
20        abi: &FnAbi<'tcx, Ty<'tcx>>,
21        args: &[OpTy<'tcx>],
22        dest: &MPlaceTy<'tcx>,
23    ) -> InterpResult<'tcx, EmulateItemResult> {
24        let this = self.eval_context_mut();
25        match link_name.as_str() {
26            // epoll, eventfd
27            "epoll_create1" => {
28                let [flag] = this.check_shim(abi, Conv::C, link_name, args)?;
29                let result = this.epoll_create1(flag)?;
30                this.write_scalar(result, dest)?;
31            }
32            "epoll_ctl" => {
33                let [epfd, op, fd, event] = this.check_shim(abi, Conv::C, link_name, args)?;
34                let result = this.epoll_ctl(epfd, op, fd, event)?;
35                this.write_scalar(result, dest)?;
36            }
37            "epoll_wait" => {
38                let [epfd, events, maxevents, timeout] =
39                    this.check_shim(abi, Conv::C, link_name, args)?;
40                this.epoll_wait(epfd, events, maxevents, timeout, dest)?;
41            }
42            "eventfd" => {
43                let [val, flag] = this.check_shim(abi, Conv::C, link_name, args)?;
44                let result = this.eventfd(val, flag)?;
45                this.write_scalar(result, dest)?;
46            }
47
48            // Miscellaneous
49            "__errno" => {
50                let [] = this.check_shim(abi, Conv::C, link_name, args)?;
51                let errno_place = this.last_error_place()?;
52                this.write_scalar(errno_place.to_ref(this).to_scalar(), dest)?;
53            }
54
55            // Dynamically invoked syscalls
56            "syscall" => syscall(this, link_name, abi, args, dest)?,
57
58            // Threading
59            "prctl" => prctl(this, link_name, abi, args, dest)?,
60
61            _ => return interp_ok(EmulateItemResult::NotSupported),
62        }
63        interp_ok(EmulateItemResult::NeedsReturn)
64    }
65}
miri/shims/unix/android/foreign_items.rs

miri/shims/unix/android/
foreign_items.rs
