fix(lib): use #[cfg(target_arch = ...)] to guard __read(fsd|gsq)word

src/lib.rs

@@ -33,6 +33,7 @@
 /// Bindings for `phnt` (nightly) generated by `bindgen`
 pub mod ffi {
    // use vendored bindings
+   // TODO: Restrict use of vendored bindings to x86_64 targets at compile-time. Alternatively: Ship vendored bindings for all architectures (or maybe have diffs and apply this in a build script if that is possible)
    #[cfg_attr(docsrs, doc(cfg(not(feature = "regenerate"))))]
    #[cfg(not(feature = "regenerate"))]
    include!("ffi/generated.rs");
@@ -48,56 +49,37 @@ pub mod ext {
    use crate::ffi::*;
    use core::{arch::asm, mem, ptr};
 
-   #[macro_export]
-   macro_rules! InitializeObjectAttributes {
-      ($p:expr, $n:expr, $a:expr, $r:expr, $s:expr) => {
-         let attrs = $p;
-         attrs.Length =
-            unsafe { u32::try_from(core::mem::size_of::<ffi::OBJECT_ATTRIBUTES>()).unwrap_unchecked() };
-         attrs.RootDirectory = $r;
-         attrs.ObjectName = $n;
-         attrs.Attributes = $a;
-         attrs.SecurityDescriptor = $s;
-         attrs.SecurityQualityOfService = core::ptr::null_mut();
-      };
-   }
-
    #[inline]
+   #[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
    pub unsafe fn __readfsdword(offset: u32) -> usize {
       let out: usize;
       asm!(
-          "mov {:e}, fs:[{:e}]",
-          lateout(reg) out,
-          in(reg) offset,
+          "mov {}, fs:[{}]",
+          lateout(reg) out, in(reg) offset,
           options(nostack, pure, readonly),
       );
       out
    }
 
    #[inline]
-   #[cfg(target_pointer_width = "64")]
+   #[cfg(target_arch = "x86_64")]
    pub unsafe fn __readgsqword(offset: u32) -> usize {
       let out: usize;
       asm!(
-          "mov {}, gs:[{:e}]",
-          lateout(reg) out,
-          in(reg) offset,
+          "mov {}, gs:[{}]",
+          lateout(reg) out, in(reg) offset,
           options(nostack, pure, readonly),
       );
       out
    }
 
    #[inline]
    pub unsafe fn NtCurrentTeb() -> *mut TEB {
-      let teb_offset = mem::offset_of!(NT_TIB, Self_) as u32;
+      const TEB_OFFSET = mem::offset_of!(NT_TIB, Self_) as u32;
       #[cfg(target_arch = "x86_64")]
-      {
-         __readgsqword(teb_offset) as _
-      }
+      __readgsqword(TEB_OFFSET) as _
       #[cfg(target_arch = "x86")]
-      {
-         __readfsdword(teb_offset) as _
-      }
+      __readfsdword(TEB_OFFSET) as _
    }
 
    #[cfg(test)]