diff --git a/Cargo.lock b/Cargo.lock
index 4b39524..4faacd1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,24 +17,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
-[[package]]
-name = "aho-corasick"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
-dependencies = [
- "memchr",
-]
-
-[[package]]
-name = "ansi_term"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
-dependencies = [
- "winapi",
-]
-
 [[package]]
 name = "argh"
 version = "0.1.12"
@@ -66,17 +48,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "atty"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
-dependencies = [
- "hermit-abi",
- "libc",
- "winapi",
-]
-
 [[package]]
 name = "backtrace"
 version = "0.3.69"
@@ -85,43 +56,13 @@ checksum = "2089b7e3f35b9dd2d0ed921ead4f6d318c27680d4a5bd167b3ee120edb105837"
 dependencies = [
  "addr2line",
  "cc",
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
  "miniz_oxide",
  "object",
  "rustc-demangle",
 ]
 
-[[package]]
-name = "bindgen"
-version = "0.53.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c72a978d268b1d70b0e963217e60fdabd9523a941457a6c42a7315d15c7e89e5"
-dependencies = [
- "bitflags 1.3.2",
- "cexpr",
- "cfg-if 0.1.10",
- "clang-sys",
- "clap",
- "env_logger",
- "lazy_static",
- "lazycell",
- "log",
- "peeking_take_while",
- "proc-macro2",
- "quote",
- "regex",
- "rustc-hash",
- "shlex",
- "which",
-]
-
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
 [[package]]
 name = "bitflags"
 version = "2.4.1"
@@ -137,53 +78,12 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "cexpr"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4aedb84272dbe89af497cf81375129abda4fc0a9e7c5d317498c15cc30c0d27"
-dependencies = [
- "nom",
-]
-
-[[package]]
-name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "clang-sys"
-version = "0.29.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe6837df1d5cba2397b835c8530f51723267e16abbf83892e9e5af4f0e5dd10a"
-dependencies = [
- "glob",
- "libc",
- "libloading",
-]
-
-[[package]]
-name = "clap"
-version = "2.34.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
-dependencies = [
- "ansi_term",
- "atty",
- "bitflags 1.3.2",
- "strsim",
- "textwrap",
- "unicode-width",
- "vec_map",
-]
-
 [[package]]
 name = "color-eyre"
 version = "0.6.2"
@@ -211,19 +111,6 @@ dependencies = [
  "tracing-error",
 ]
 
-[[package]]
-name = "env_logger"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
-dependencies = [
- "atty",
- "humantime",
- "log",
- "regex",
- "termcolor",
-]
-
 [[package]]
 name = "eyre"
 version = "0.6.8"
@@ -240,12 +127,6 @@ version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6fb8d784f27acf97159b40fc4db5ecd8aa23b9ad5ef69cdd136d3bc80665f0c0"
 
-[[package]]
-name = "glob"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
-
 [[package]]
 name = "hbbytecode"
 version = "0.1.0"
@@ -266,25 +147,6 @@ version = "0.1.0"
 dependencies = [
  "hbvm",
  "nix",
- "setjmp",
-]
-
-[[package]]
-name = "hermit-abi"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
-
-[[package]]
-name = "humantime"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df004cfca50ef23c36850aaaa59ad52cc70d0e90243c3c7737a4dd32dc7a3c4f"
-dependencies = [
- "quick-error",
 ]
 
 [[package]]
@@ -299,34 +161,12 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
-[[package]]
-name = "lazycell"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
-
 [[package]]
 name = "libc"
 version = "0.2.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a08173bc88b7955d1b3145aa561539096c421ac8debde8cbc3612ec635fee29b"
 
-[[package]]
-name = "libloading"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2b111a074963af1d37a139918ac6d49ad1d0d5e47f72fd55388619691a7d753"
-dependencies = [
- "cc",
- "winapi",
-]
-
-[[package]]
-name = "log"
-version = "0.4.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
-
 [[package]]
 name = "memchr"
 version = "2.6.4"
@@ -348,21 +188,11 @@ version = "0.27.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2eb04e9c688eff1c89d72b407f168cf79bb9e867a9d3323ed6c01519eb9cc053"
 dependencies = [
- "bitflags 2.4.1",
- "cfg-if 1.0.0",
+ "bitflags",
+ "cfg-if",
  "libc",
 ]
 
-[[package]]
-name = "nom"
-version = "5.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08959a387a676302eebf4ddbcbc611da04285579f76f88ee0506c63b1a61dd4b"
-dependencies = [
- "memchr",
- "version_check",
-]
-
 [[package]]
 name = "object"
 version = "0.32.1"
@@ -384,12 +214,6 @@ version = "3.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1b04fb49957986fdce4d6ee7a65027d55d4b6d2265e5848bbb507b58ccfdb6f"
 
-[[package]]
-name = "peeking_take_while"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
-
 [[package]]
 name = "pin-project-lite"
 version = "0.2.13"
@@ -405,12 +229,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "quick-error"
-version = "1.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
-
 [[package]]
 name = "quote"
 version = "1.0.33"
@@ -420,47 +238,12 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "regex"
-version = "1.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-automata",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-automata"
-version = "0.4.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-syntax"
-version = "0.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
-
 [[package]]
 name = "rustc-demangle"
 version = "0.1.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
 
-[[package]]
-name = "rustc-hash"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
-
 [[package]]
 name = "serde"
 version = "1.0.189"
@@ -481,17 +264,6 @@ dependencies = [
  "syn 2.0.38",
 ]
 
-[[package]]
-name = "setjmp"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9bce8e042e9b4349ccf7ce5caeb5c9b7ee6007ff543b494733ae8ed4ea083c73"
-dependencies = [
- "bindgen",
- "clang-sys",
- "libc",
-]
-
 [[package]]
 name = "sharded-slab"
 version = "0.1.7"
@@ -501,18 +273,6 @@ dependencies = [
  "lazy_static",
 ]
 
-[[package]]
-name = "shlex"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fdf1b9db47230893d76faad238fd6097fd6d6a9245cd7a4d90dbd639536bbd2"
-
-[[package]]
-name = "strsim"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
-
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -535,31 +295,13 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "termcolor"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6093bad37da69aab9d123a8091e4be0aa4a03e4d601ec641c327398315f62b64"
-dependencies = [
- "winapi-util",
-]
-
-[[package]]
-name = "textwrap"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
-dependencies = [
- "unicode-width",
-]
-
 [[package]]
 name = "thread_local"
 version = "1.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "once_cell",
 ]
 
@@ -610,70 +352,12 @@ version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
-[[package]]
-name = "unicode-width"
-version = "0.1.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e51733f11c9c4f72aa0c160008246859e340b00807569a0da0e7a1079b27ba85"
-
 [[package]]
 name = "valuable"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
-[[package]]
-name = "vec_map"
-version = "0.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
-
-[[package]]
-name = "version_check"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
-
-[[package]]
-name = "which"
-version = "3.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d011071ae14a2f6671d0b74080ae0cd8ebf3a6f8c9589a2cd45f23126fe29724"
-dependencies = [
- "libc",
-]
-
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
-[[package]]
-name = "winapi-util"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f29e6f9198ba0d26b4c9f07dbe6f9ed633e1f3d5b8b414090084349e46a52596"
-dependencies = [
- "winapi",
-]
-
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
 [[package]]
 name = "with_builtin_macros"
 version = "0.0.3"
diff --git a/hbxrt/Cargo.toml b/hbxrt/Cargo.toml
index 6831f3e..2fd08a9 100644
--- a/hbxrt/Cargo.toml
+++ b/hbxrt/Cargo.toml
@@ -7,4 +7,3 @@ default-run = "hbxrt"
 [dependencies]
 hbvm.path = "../hbvm"
 nix       = { version = "0.27", features = ["mman", "signal"] }
-setjmp    = "0.1"
diff --git a/hbxrt/src/main.rs b/hbxrt/src/main.rs
index e10194b..ac0c022 100644
--- a/hbxrt/src/main.rs
+++ b/hbxrt/src/main.rs
@@ -4,10 +4,7 @@ mod mem;
 use {
     hbvm::{mem::Address, Vm, VmRunOk},
     nix::sys::mman::{mmap, MapFlags, ProtFlags},
-    setjmp::sigjmp_buf,
-    std::{
-        cell::UnsafeCell, env::args, fs::File, mem::MaybeUninit, num::NonZeroUsize, process::exit,
-    },
+    std::{env::args, fs::File, num::NonZeroUsize, process::exit},
 };
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -42,9 +39,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     unsafe {
         use nix::sys::signal;
 
-        static JMP_BUF: SyncUnsafeCell<MaybeUninit<sigjmp_buf>> =
-            SyncUnsafeCell::new(MaybeUninit::uninit());
-
         extern "C" fn action(
             _: std::ffi::c_int,
             info: *mut nix::libc::siginfo_t,
@@ -52,19 +46,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         ) {
             unsafe {
                 eprintln!("[E] Memory access fault at {:p}", (*info).si_addr());
-                setjmp::siglongjmp((*JMP_BUF.get()).as_mut_ptr(), 1);
             }
         }
 
-        if setjmp::sigsetjmp((*JMP_BUF.get()).as_mut_ptr(), 0) > 0 {
-            eprintln!(
-                "    Program counter: {:#x}\n\n== Registers ==\n{:?}",
-                vm.pc.get(),
-                vm.registers
-            );
-            exit(3);
-        }
-
         signal::sigaction(
             signal::Signal::SIGSEGV,
             &nix::sys::signal::SigAction::new(
@@ -107,25 +91,3 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
-
-#[repr(transparent)]
-struct SyncUnsafeCell<T: ?Sized> {
-    value: UnsafeCell<T>,
-}
-
-unsafe impl<T: ?Sized + Sync> Sync for SyncUnsafeCell<T> {}
-impl<T> SyncUnsafeCell<T> {
-    #[inline(always)]
-    pub const fn new(value: T) -> Self {
-        Self {
-            value: UnsafeCell::new(value),
-        }
-    }
-}
-
-impl<T: ?Sized> SyncUnsafeCell<T> {
-    #[inline(always)]
-    pub const fn get(&self) -> *mut T {
-        self.value.get()
-    }
-}