diff --git a/Cargo.lock b/Cargo.lock
index c487725..509889e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -72,9 +72,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.13.0"
+version = "2.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4388bee8683e3d04af747c73422af53102d2bd24d9eadb6cbc100baef4b43f8"
+checksum = "b588b76d00fde79687d7646a9b5bdf3cc0f655e0bbd080335a95d7e96f3587da"
 
 [[package]]
 name = "bitstruct"
@@ -101,7 +101,7 @@ name = "bldb"
 version = "0.1.0"
 dependencies = [
  "bit_field",
- "bitflags 2.13.0",
+ "bitflags 2.13.1",
  "bitstruct",
  "cpio_reader",
  "goblin",
@@ -109,7 +109,7 @@ dependencies = [
  "miniz_oxide",
  "seq-macro",
  "sha2",
- "spin 0.12.0",
+ "spin 0.12.2",
  "static_assertions",
  "x86",
  "xmodem",
@@ -139,9 +139,9 @@ checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
 [[package]]
 name = "clap"
-version = "4.6.1"
+version = "4.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ddb117e43bbf7dacf0a4190fef4d345b9bad68dfc649cb349e7d17d28428e51"
+checksum = "dd059f9da4f5c36b3787f65d38ccaab1cc315f07b01f89abc8359ee6a8205011"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -149,9 +149,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.6.0"
+version = "4.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "714a53001bf66416adb0e2ef5ac857140e7dc3a0c48fb28b2f10762fc4b5069f"
+checksum = "f09628afdcc538b57f3c6341e9c8e9970f18e4a481690a64974d7023bd33548b"
 dependencies = [
  "anstream",
  "anstyle",
@@ -168,7 +168,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.117",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -195,7 +195,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5793d74f50cf1460a969f028d40963d8d6e01ebae049dea976e944335c7df492"
 dependencies = [
- "bitflags 2.13.0",
+ "bitflags 2.13.1",
 ]
 
 [[package]]
@@ -314,9 +314,9 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "hybrid-array"
-version = "0.4.12"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9155a582abd142abc056962c29e3ce5ff2ad5469f4246b537ed42c5deba857da"
+checksum = "818356c5132c1fede50f837ca96afbe78ff42413047f4abb886217845e1b6c8c"
 dependencies = [
  "typenum",
 ]
@@ -342,7 +342,7 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
 dependencies = [
- "spin 0.9.8",
+ "spin 0.9.9",
 ]
 
 [[package]]
@@ -353,9 +353,9 @@ checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
 [[package]]
 name = "log"
-version = "0.4.32"
+version = "0.4.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "953f07c43838f8e6f9758cab68bf5bed85465e7587ebe0b823f1bcd81978ad3a"
+checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad"
 
 [[package]]
 name = "miniz_oxide"
@@ -390,18 +390,18 @@ checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.106"
+version = "1.0.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fd00f0bb2e90d81d1044c2b32617f68fcb9fa3bb7640c23e9c748e53fb30934"
+checksum = "985e7ec9bb745e6ce6535b544d84d6cd6f7ad8bd711c398938ae983b91a766d9"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.45"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41f2619966050689382d2b44f664f4bc593e129785a36d6ee376ddf37259b924"
+checksum = "1fbf4db142a473a8d80c26bbf18454ed458bf8d26c8219c331daecfdbd079001"
 dependencies = [
  "proc-macro2",
 ]
@@ -432,7 +432,7 @@ checksum = "ed76efe62313ab6610570951494bdaa81568026e0318eaa55f167de70eeea67d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.117",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -502,15 +502,15 @@ dependencies = [
 
 [[package]]
 name = "spin"
-version = "0.9.8"
+version = "0.9.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
+checksum = "3763264f6b73151db08c50ff20d7d8a0b8796e021cdea7ceedad07b80155fa0e"
 
 [[package]]
 name = "spin"
-version = "0.12.0"
+version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1527984ca054dfca79333baec451042863f485fbee01b7bf6d911de915cac865"
+checksum = "8abadc99fd9c7bbb7d0ca2b31d72a067d0c0dcd7aad25ab8cac71ba91417694b"
 
 [[package]]
 name = "stable_deref_trait"
@@ -548,7 +548,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.117",
+ "syn 2.0.119",
 ]
 
 [[package]]
@@ -564,9 +564,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.117"
+version = "2.0.119"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e665b8803e7b1d2a727f4023456bbbbe74da67099c585258af0ad9c5013b9b99"
+checksum = "872831b642d1a07999a962a351ed35b955ea2cfc8f3862091e2a240a84f17297"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -575,9 +575,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec"
-version = "1.11.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e61e67053d25a4e82c844e8424039d9745781b3fc4f32b8d55ed50f5f667ef3"
+checksum = "bb4ebadaa0af04fab11ae01eb5f9fdb5f9c5b875506e210e71c07873528baa7f"
 
 [[package]]
 name = "typenum"
@@ -719,7 +719,7 @@ name = "zmodem2"
 version = "0.1.2"
 source = "git+https://github.com/oxidecomputer/zmodem2#f3c1d8422c6356f51131d8ced7502e44fc9153d4"
 dependencies = [
- "bitflags 2.13.0",
+ "bitflags 2.13.1",
  "crc",
  "heapless",
  "hex",
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 54ea4fa..bef1e8e 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2026-06-16"
+channel = "nightly-2026-07-20"
 components = [ "rustfmt", "rust-src", "llvm-tools", "clippy", "miri", "rust-analyzer" ]
diff --git a/src/allocator.rs b/src/allocator.rs
index 00b25c7..c5a4176 100644
--- a/src/allocator.rs
+++ b/src/allocator.rs
@@ -87,14 +87,14 @@ impl BumpAlloc {
     /// and the second is the requested block itself.
     pub(crate) fn try_alloc(
         &self,
-        align: usize,
         size: usize,
+        align: usize,
     ) -> Option<(Block, Block)> {
         let base = self.arena.as_ptr();
         let mut first = ptr::null_mut();
         let mut adjust = 0;
         self.cursor
-            .fetch_update(Ordering::Relaxed, Ordering::Relaxed, |current| {
+            .try_update(Ordering::Relaxed, Ordering::Relaxed, |current| {
                 first = base.wrapping_add(current);
                 adjust = first.align_offset(align);
                 let offset =
@@ -118,10 +118,10 @@ impl BumpAlloc {
     #[allow(clippy::mut_from_ref)]
     pub(crate) fn alloc_bytes(
         &self,
-        align: usize,
         size: usize,
+        align: usize,
     ) -> Option<&mut [u8]> {
-        let (_, block) = self.try_alloc(align, size)?;
+        let (_, block) = self.try_alloc(size, align)?;
         let ptr = block.as_ptr();
         unsafe {
             ptr::write_bytes(ptr, 0, size);
diff --git a/src/mmu.rs b/src/mmu.rs
index 7cb8edd..f281853 100644
--- a/src/mmu.rs
+++ b/src/mmu.rs
@@ -1680,7 +1680,7 @@ mod arena {
             assert_eq!(align, PAGE_SIZE);
             assert_eq!(size, PAGE_SIZE);
             let page_allocator = unsafe { &*PAGE_ALLOCATOR.get() };
-            let a = page_allocator.alloc_bytes(align, size);
+            let a = page_allocator.alloc_bytes(size, align);
             let p = a.ok_or(AllocError)?;
             Ok(p.into())
         }
diff --git a/x86_64-oxide-none-elf.json b/x86_64-oxide-none-elf.json
index 20ab846..4fabbf3 100644
--- a/x86_64-oxide-none-elf.json
+++ b/x86_64-oxide-none-elf.json
@@ -14,7 +14,7 @@
 	"frame-pointer": "always",
 	"disable-redzone": true,
 	"features": "-avx,-avx2,-avx512bf16,-f16c,-fxsr,-mmx,-sse,-sse2,-sse3,-sse4.1,-sse4.2,-sse4a,-ssse3,-x87,+soft-float",
-	"rustc-abi": "x86-softfloat",
+	"rustc-abi": "softfloat",
 	"linker-flavor": "ld",
 	"linker": "ld.lld",
 	"no-default-libraries": true,