diff --git a/cranelift/native/src/lib.rs b/cranelift/native/src/lib.rs
index 8250b1e524f4..8d2a3ca1cc40 100644
--- a/cranelift/native/src/lib.rs
+++ b/cranelift/native/src/lib.rs
@@ -46,7 +46,12 @@ pub fn builder_with_options(infer_native_flags: bool) -> Result<isa::Builder, &'
         isa::LookupError::Unsupported => "unsupported architecture",
     })?;
 
-    #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+    #[cfg(target_arch = "x86")]
+    {
+        compile_error!("Unsupported architecture");
+    }
+
+    #[cfg(target_arch = "x86_64")]
     {
         use cranelift_codegen::settings::Configurable;
 
diff --git a/crates/jit/src/unwind.rs b/crates/jit/src/unwind.rs
index feb37c50f346..72284872ce1d 100644
--- a/crates/jit/src/unwind.rs
+++ b/crates/jit/src/unwind.rs
@@ -2,9 +2,6 @@ cfg_if::cfg_if! {
     if #[cfg(all(windows, any(target_arch = "x86_64", target_arch = "aarch64")))] {
         mod winx64;
         pub use self::winx64::*;
-    } else if #[cfg(all(windows, target_arch = "x86"))] {
-        mod winx32;
-        pub use self::winx32::*;
     } else if #[cfg(unix)] {
         mod systemv;
         pub use self::systemv::*;
diff --git a/crates/jit/src/unwind/winx32.rs b/crates/jit/src/unwind/winx32.rs
deleted file mode 100644
index 25b887ce72a9..000000000000
--- a/crates/jit/src/unwind/winx32.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-//! Stub unwind registry for Windows x32.
-
-use anyhow::{bail, Result};
-use cranelift_codegen::isa::{unwind::UnwindInfo, TargetIsa};
-
-pub struct UnwindRegistry {}
-
-impl UnwindRegistry {
-    pub fn new(_base_address: usize) -> Self {
-        Self {}
-    }
-
-    pub fn register(&mut self, _func_start: u32, _func_len: u32, _info: &UnwindInfo) -> Result<()> {
-        bail!("winx32 has no unwind registry")
-    }
-
-    pub fn publish(&mut self, _isa: &dyn TargetIsa) -> Result<()> {
-        Ok(())
-    }
-}
diff --git a/crates/runtime/src/traphandlers/macos.rs b/crates/runtime/src/traphandlers/macos.rs
index 54f9d0269e9c..b8047e03a289 100644
--- a/crates/runtime/src/traphandlers/macos.rs
+++ b/crates/runtime/src/traphandlers/macos.rs
@@ -120,7 +120,7 @@ mod mach_addons {
 
     pub static ARM_THREAD_STATE64: thread_state_flavor_t = 6;
 
-    #[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
+    #[cfg(target_arch = "x86_64")]
     pub static THREAD_STATE_NONE: thread_state_flavor_t = 13;
     #[cfg(target_arch = "aarch64")]
     pub static THREAD_STATE_NONE: thread_state_flavor_t = 5;
diff --git a/crates/runtime/src/traphandlers/unix.rs b/crates/runtime/src/traphandlers/unix.rs
index 64dfe58f169a..83af764adfbb 100644
--- a/crates/runtime/src/traphandlers/unix.rs
+++ b/crates/runtime/src/traphandlers/unix.rs
@@ -47,16 +47,24 @@ pub unsafe fn platform_init() {
     register(&mut PREV_SIGILL, libc::SIGILL);
 
     // x86 and s390x use SIGFPE to report division by zero
-    if cfg!(target_arch = "x86") || cfg!(target_arch = "x86_64") || cfg!(target_arch = "s390x") {
+    if cfg!(target_arch = "x86_64") || cfg!(target_arch = "s390x") {
         register(&mut PREV_SIGFPE, libc::SIGFPE);
     }
 
     // Sometimes we need to handle SIGBUS too:
-    // - On ARM, handle Unaligned Accesses.
     // - On Darwin, guard page accesses are raised as SIGBUS.
-    if cfg!(target_arch = "arm") || cfg!(target_os = "macos") || cfg!(target_os = "freebsd") {
+    if cfg!(target_os = "macos") || cfg!(target_os = "freebsd") {
         register(&mut PREV_SIGBUS, libc::SIGBUS);
     }
+
+    #[cfg(target_arch = "x86")]
+    {
+        compile_error!("x86-32 unsupported; may need SIGFPE handler registered");
+    }
+    #[cfg(target_arch = "arm")]
+    {
+        compile_error!("ARM32 unsupported; may need SIGBUS handler registered");
+    }
 }
 
 unsafe extern "C" fn trap_handler(
@@ -172,12 +180,6 @@ unsafe fn get_pc_and_fp(cx: *mut libc::c_void, _signum: libc::c_int) -> (*const
                 cx.uc_mcontext.gregs[libc::REG_RIP as usize] as *const u8,
                 cx.uc_mcontext.gregs[libc::REG_RBP as usize] as usize
             )
-        } else if #[cfg(all(target_os = "linux", target_arch = "x86"))] {
-            let cx = &*(cx as *const libc::ucontext_t);
-            (
-                cx.uc_mcontext.gregs[libc::REG_EIP as usize] as *const u8,
-                cx.uc_mcontext.gregs[libc::REG_EBP as usize] as usize,
-            )
         } else if #[cfg(all(any(target_os = "linux", target_os = "android"), target_arch = "aarch64"))] {
             let cx = &*(cx as *const libc::ucontext_t);
             (
@@ -210,12 +212,6 @@ unsafe fn get_pc_and_fp(cx: *mut libc::c_void, _signum: libc::c_int) -> (*const
                 (*cx.uc_mcontext).__ss.__rip as *const u8,
                 (*cx.uc_mcontext).__ss.__rbp as usize,
             )
-        } else if #[cfg(all(target_os = "macos", target_arch = "x86"))] {
-            let cx = &*(cx as *const libc::ucontext_t);
-            (
-                (*cx.uc_mcontext).__ss.__eip as *const u8,
-                (*cx.uc_mcontext).__ss.__ebp as usize,
-            )
         } else if #[cfg(all(target_os = "macos", target_arch = "aarch64"))] {
             let cx = &*(cx as *const libc::ucontext_t);
             (
diff --git a/crates/runtime/src/traphandlers/windows.rs b/crates/runtime/src/traphandlers/windows.rs
index c76c1b0c068f..a9c1b4f04424 100644
--- a/crates/runtime/src/traphandlers/windows.rs
+++ b/crates/runtime/src/traphandlers/windows.rs
@@ -55,9 +55,6 @@ unsafe extern "system" fn exception_handler(exception_info: *mut EXCEPTION_POINT
             if #[cfg(target_arch = "x86_64")] {
                 let ip = (*(*exception_info).ContextRecord).Rip as *const u8;
                 let fp = (*(*exception_info).ContextRecord).Rbp as usize;
-            } else if #[cfg(target_arch = "x86")] {
-                let ip = (*(*exception_info).ContextRecord).Eip as *const u8;
-                let fp = (*(*exception_info).ContextRecord).Ebp as usize;
             } else if #[cfg(target_arch = "aarch64")] {
                 let ip = (*(*exception_info).ContextRecord).Pc as *const u8;
                 let fp = (*(*exception_info).ContextRecord).Anonymous.Anonymous.Fp as usize;