src/shims/foreign_items/posix/linux.rs

   1 use crate::*;
   2
   3 impl<'mir, 'tcx> EvalContextExt<'mir, 'tcx> for crate::MiriEvalContext<'mir, 'tcx> {}
   4 pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx> {
   5     fn emulate_foreign_item_by_name(
   6         &mut self,
   7         link_name: &str,
   8         args: &[OpTy<'tcx, Tag>],
   9         dest: PlaceTy<'tcx, Tag>,
  10     ) -> InterpResult<'tcx> {
  11         let this = self.eval_context_mut();
  12
  13         match link_name {
  14             "__errno_location" => {
  15                 let errno_place = this.machine.last_error.unwrap();
  16                 this.write_scalar(errno_place.to_ref().to_scalar()?, dest)?;
  17             }
  18
  19             // File related shims
  20             "open64" => {
  21                 let result = this.open(args[0], args[1])?;
  22                 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
  23             }
  24
  25             "close" => {
  26                 let result = this.close(args[0])?;
  27                 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
  28             }
  29
  30             "lseek64" => {
  31                 let result = this.lseek64(args[0], args[1], args[2])?;
  32                 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
  33             }
  34
  35             // Time related shims
  36             "clock_gettime" => {
  37                 let result = this.clock_gettime(args[0], args[1])?;
  38                 this.write_scalar(Scalar::from_int(result, dest.layout.size), dest)?;
  39             }
  40
  41             "pthread_getattr_np" => {
  42                 this.write_null(dest)?;
  43             }
  44             _ => throw_unsup_format!("can't call foreign function: {}", link_name),
  45         };
  46
  47         Ok(())
  48     }
  49 }