diff --git a/c-scape/Cargo.toml b/c-scape/Cargo.toml
index f81a7c9..a2fa32c 100644
--- a/c-scape/Cargo.toml
+++ b/c-scape/Cargo.toml
@@ -19,11 +19,11 @@ cc = { version = "1.0.68", optional = true }
 
 [dependencies]
 libm = "0.2.1"
-rustix = { version = "0.38.31", default-features = false, features = ["event", "fs", "itoa", "mm", "net", "param", "pipe", "process", "rand", "runtime", "shm", "stdio", "system", "termios", "thread", "time"] }
+rustix = { version = "0.38.33", default-features = false, features = ["event", "fs", "itoa", "mm", "net", "param", "pipe", "process", "rand", "runtime", "shm", "stdio", "system", "termios", "thread", "time"] }
 rustix-futex-sync = { version = "0.2.1", features = ["atomic_usize"] }
 memoffset = "0.9.0"
 realpath-ext = { version = "0.1.0", default-features = false }
-origin = { version = "0.18.1", default-features = false, features = ["thread", "init-fini-arrays", "alloc"] }
+origin = { version = "0.18.3", default-features = false, features = ["thread", "init-fini-arrays", "alloc"] }
 # We use the libc crate for C ABI types and constants, but we don't depend on
 # the actual platform libc.
 libc = { version = "0.2.138", default-features = false }
diff --git a/c-scape/src/process_.rs b/c-scape/src/process_.rs
index dfa9761..e720879 100644
--- a/c-scape/src/process_.rs
+++ b/c-scape/src/process_.rs
@@ -170,7 +170,7 @@ fn _pathconf(name: c_int) -> c_long {
 #[cfg(feature = "take-charge")]
 #[no_mangle]
 unsafe extern "C" fn getauxval(type_: c_ulong) -> *mut c_void {
-    libc!(ptr::from_exposed_addr_mut(libc::getauxval(type_) as _));
+    libc!(ptr::with_exposed_provenance_mut(libc::getauxval(type_) as _));
     _getauxval(type_)
 }
 
@@ -187,9 +187,13 @@ unsafe extern "C" fn __getauxval(type_: c_ulong) -> *mut c_void {
 
 #[cfg(feature = "take-charge")]
 fn _getauxval(type_: c_ulong) -> *mut c_void {
+    // FIXME: reuse const from libc when available?
+    const AT_MINSIGSTKSZ: libc::c_ulong = 51;
+
     match type_ {
         libc::AT_HWCAP => ptr::without_provenance_mut(rustix::param::linux_hwcap().0),
         libc::AT_HWCAP2 => ptr::without_provenance_mut(rustix::param::linux_hwcap().1),
+        AT_MINSIGSTKSZ => ptr::without_provenance_mut(rustix::param::linux_minsigstksz()),
         _ => todo!("unrecognized __getauxval {}", type_),
     }
 }
@@ -214,7 +218,7 @@ unsafe extern "C" fn dl_iterate_phdr(
 
     let (phdr, _phent, phnum) = rustix::runtime::exe_phdrs();
     let mut info = libc::dl_phdr_info {
-        dlpi_addr: addr_of!(__executable_start).expose_addr() as _,
+        dlpi_addr: addr_of!(__executable_start).expose_provenance() as _,
         dlpi_name: c"/proc/self/exe".as_ptr(),
         dlpi_phdr: phdr.cast(),
         dlpi_phnum: phnum.try_into().unwrap(),
diff --git a/c-scape/src/thread/mod.rs b/c-scape/src/thread/mod.rs
index 56f9737..1edff5d 100644
--- a/c-scape/src/thread/mod.rs
+++ b/c-scape/src/thread/mod.rs
@@ -122,14 +122,14 @@ libc_type!(PthreadRwlockattrT, pthread_rwlockattr_t);
 
 #[no_mangle]
 unsafe extern "C" fn pthread_self() -> PthreadT {
-    libc!(ptr::from_exposed_addr_mut(libc::pthread_self() as _));
+    libc!(ptr::with_exposed_provenance_mut(libc::pthread_self() as _));
     thread::current().to_raw().cast()
 }
 
 #[no_mangle]
 unsafe extern "C" fn pthread_getattr_np(thread: PthreadT, attr: *mut PthreadAttrT) -> c_int {
     libc!(libc::pthread_getattr_np(
-        thread.expose_addr() as _,
+        thread.expose_provenance() as _,
         checked_cast!(attr)
     ));
     let (stack_addr, stack_size, guard_size) = thread::stack(Thread::from_raw(thread.cast()));
@@ -741,14 +741,14 @@ unsafe extern "C" fn pthread_create(
 
 #[no_mangle]
 unsafe extern "C" fn pthread_detach(pthread: PthreadT) -> c_int {
-    libc!(libc::pthread_detach(pthread.expose_addr() as _));
+    libc!(libc::pthread_detach(pthread.expose_provenance() as _));
     thread::detach(Thread::from_raw(pthread.cast()));
     0
 }
 
 #[no_mangle]
 unsafe extern "C" fn pthread_join(pthread: PthreadT, retval: *mut *mut c_void) -> c_int {
-    libc!(libc::pthread_join(pthread.expose_addr() as _, retval));
+    libc!(libc::pthread_join(pthread.expose_provenance() as _, retval));
 
     let return_value = thread::join(Thread::from_raw(pthread.cast()));
 
@@ -852,7 +852,7 @@ unsafe extern "C" fn pthread_getname_np(
     len: size_t,
 ) -> c_int {
     libc!(libc::pthread_getname_np(
-        pthread.expose_addr() as _,
+        pthread.expose_provenance() as _,
         name,
         len
     ));
@@ -909,7 +909,7 @@ unsafe extern "C" fn pthread_getname_np(
 #[cfg(target_os = "linux")]
 #[no_mangle]
 unsafe extern "C" fn pthread_setname_np(pthread: PthreadT, name: *const libc::c_char) -> c_int {
-    libc!(libc::pthread_setname_np(pthread.expose_addr() as _, name));
+    libc!(libc::pthread_setname_np(pthread.expose_provenance() as _, name));
 
     let name = core::ffi::CStr::from_ptr(name);
     let bytes = name.to_bytes();
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index c9a29fc..e51ce31 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2024-02-26"
+channel = "nightly-2024-04-21"
 components = ["rustc", "cargo", "rust-std", "rust-src", "rustfmt"]