diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b5dbefef4e..6542170e2d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -176,6 +176,10 @@ jobs:
             tuple: s390x-unknown-linux-gnu
             os: ubuntu-latest
           test_everything: true
+        - target:
+            tuple: i686-unknown-linux-gnu
+            os: ubuntu-latest
+          test_everything: true
         - target:
             tuple: x86_64-unknown-linux-gnu
             os: ubuntu-latest
diff --git a/Cargo.lock b/Cargo.lock
index a1c31fa9f0..70f1644ec6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -84,15 +84,15 @@ checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
 [[package]]
 name = "bitflags"
-version = "2.11.0"
+version = "2.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
+checksum = "c4512299f36f043ab09a583e57bceb5a5aab7a73db1805848e8fef3c9e8c78b3"
 
 [[package]]
 name = "cc"
-version = "1.2.59"
+version = "1.2.61"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7a4d3ec6524d28a329fc53654bbadc9bdd7b0431f5d65f1a56ffb28a1ee5283"
+checksum = "d16d90359e986641506914ba71350897565610e87ce0ad9e6f28569db3dd5c6d"
 dependencies = [
  "find-msvc-tools",
  "shlex",
@@ -106,9 +106,9 @@ checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
 [[package]]
 name = "clap"
-version = "4.6.0"
+version = "4.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b193af5b67834b676abd72466a96c1024e6a6ad978a1f484bd90b85c94041351"
+checksum = "1ddb117e43bbf7dacf0a4190fef4d345b9bad68dfc649cb349e7d17d28428e51"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -128,9 +128,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.6.0"
+version = "4.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1110bd8a634a1ab8cb04345d8d878267d57c3cf1b38d91b71af6686408bbca6a"
+checksum = "f2ce8604710f6733aa641a2b3731eaa1e8b3d9973d5e3565da11800813f997a9"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -300,7 +300,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "r-efi",
- "rand_core 0.10.0",
+ "rand_core 0.10.1",
  "wasip2",
  "wasip3",
 ]
@@ -322,9 +322,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.16.1"
+version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
+checksum = "4f467dd6dccf739c208452f8014c75c18bb8301b050ad1cfb27153803edb0f51"
 
 [[package]]
 name = "heck"
@@ -368,12 +368,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.13.1"
+version = "2.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45a8a2b9cb3e0b0c1803dbb0758ffac5de2f425b23c28f518faabd9d805342ff"
+checksum = "d466e9454f08e4a911e14806c24e16fba1b4c121d1ea474396f396069cf949d9"
 dependencies = [
  "equivalent",
- "hashbrown 0.16.1",
+ "hashbrown 0.17.0",
  "serde",
  "serde_core",
 ]
@@ -435,9 +435,9 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "libc"
-version = "0.2.184"
+version = "0.2.186"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48f5d2a454e16a5ea0f4ced81bd44e4cfc7bd3a507b61887c99fd3538b28e4af"
+checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
 [[package]]
 name = "linked-hash-map"
@@ -529,7 +529,7 @@ checksum = "95c589f335db0f6aaa168a7cd27b1fc6920f5e1470c804f814d9cd6e62a0f70b"
 dependencies = [
  "env_logger 0.11.10",
  "log",
- "rand 0.10.0",
+ "rand 0.10.1",
 ]
 
 [[package]]
@@ -549,9 +549,9 @@ checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
 [[package]]
 name = "rand"
-version = "0.8.5"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+checksum = "5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a"
 dependencies = [
  "libc",
  "rand_chacha",
@@ -560,12 +560,12 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc266eb313df6c5c09c1c7b1fbe2510961e5bcd3add930c1e31f7ed9da0feff8"
+checksum = "d2e8e8bcc7961af1fdac401278c6a831614941f6164ee3bf4ce61b7edb162207"
 dependencies = [
  "getrandom 0.4.2",
- "rand_core 0.10.0",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -589,15 +589,15 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c8d0fd677905edcbeedbf2edb6494d676f0e98d54d5cf9bda0b061cb8fb8aba"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
 
 [[package]]
 name = "rayon"
-version = "1.11.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "368f01d005bf8fd9b1206fb6fa653e6c4a81ceb1466406b81792d87c5677a58f"
+checksum = "fb39b166781f92d482534ef4b4b1b2568f42613b53e5b6c160e24cfbfa30926d"
 dependencies = [
  "either",
  "rayon-core",
@@ -726,9 +726,9 @@ dependencies = [
 
 [[package]]
 name = "serde_with"
-version = "3.18.0"
+version = "3.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd5414fad8e6907dbdd5bc441a50ae8d6e26151a03b1de04d89a5576de61d01f"
+checksum = "f05839ce67618e14a09b286535c0d9c94e85ef25469b0e13cb4f844e5593eb19"
 dependencies = [
  "serde_core",
  "serde_with_macros",
@@ -736,9 +736,9 @@ dependencies = [
 
 [[package]]
 name = "serde_with_macros"
-version = "3.18.0"
+version = "3.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3db8978e608f1fe7357e211969fd9abdcae80bac1ba7a3369bb7eb6b404eb65"
+checksum = "cf2ebbe86054f9b45bc3881e865683ccfaccce97b9b4cb53f3039d67f355a334"
 dependencies = [
  "darling",
  "proc-macro2",
@@ -805,7 +805,7 @@ dependencies = [
 name = "stdarch-gen-loongarch"
 version = "0.1.0"
 dependencies = [
- "rand 0.8.5",
+ "rand 0.8.6",
 ]
 
 [[package]]
@@ -838,7 +838,7 @@ version = "0.0.0"
 dependencies = [
  "core_arch",
  "quickcheck",
- "rand 0.8.5",
+ "rand 0.8.6",
 ]
 
 [[package]]
@@ -929,11 +929,11 @@ checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
 [[package]]
 name = "wasip2"
-version = "1.0.2+wasi-0.2.9"
+version = "1.0.3+wasi-0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9517f9239f02c069db75e65f174b3da828fe5f5b945c4dd26bd25d89c03ebcf5"
+checksum = "20064672db26d7cdc89c7798c48a0fdfac8213434a1186e5ef29fd560ae223d6"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.57.1",
 ]
 
 [[package]]
@@ -942,7 +942,7 @@ version = "0.4.0+wasi-0.3.0-rc-2026-01-06"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5428f8bf88ea5ddc08faddef2ac4a67e390b88186c703ce6dbd955e1c145aca5"
 dependencies = [
- "wit-bindgen",
+ "wit-bindgen 0.51.0",
 ]
 
 [[package]]
@@ -962,7 +962,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bb0e353e6a2fbdc176932bbaab493762eb1255a7900fe0fea1a2f96c296cc909"
 dependencies = [
  "anyhow",
- "indexmap 2.13.1",
+ "indexmap 2.14.0",
  "wasm-encoder",
  "wasmparser 0.244.0",
 ]
@@ -974,7 +974,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "161296c618fa2d63f6ed5fffd1112937e803cb9ec71b32b01a76321555660917"
 dependencies = [
  "bitflags",
- "indexmap 2.13.1",
+ "indexmap 2.14.0",
  "semver",
 ]
 
@@ -986,7 +986,7 @@ checksum = "47b807c72e1bac69382b3a6fb3dbe8ea4c0ed87ff5629b8685ae6b9a611028fe"
 dependencies = [
  "bitflags",
  "hashbrown 0.15.5",
- "indexmap 2.13.1",
+ "indexmap 2.14.0",
  "semver",
 ]
 
@@ -1034,6 +1034,12 @@ dependencies = [
  "wit-bindgen-rust-macro",
 ]
 
+[[package]]
+name = "wit-bindgen"
+version = "0.57.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
+
 [[package]]
 name = "wit-bindgen-core"
 version = "0.51.0"
@@ -1053,7 +1059,7 @@ checksum = "b7c566e0f4b284dd6561c786d9cb0142da491f46a9fbed79ea69cdad5db17f21"
 dependencies = [
  "anyhow",
  "heck",
- "indexmap 2.13.1",
+ "indexmap 2.14.0",
  "prettyplease",
  "syn",
  "wasm-metadata",
@@ -1084,7 +1090,7 @@ checksum = "9d66ea20e9553b30172b5e831994e35fbde2d165325bec84fc43dbf6f4eb9cb2"
 dependencies = [
  "anyhow",
  "bitflags",
- "indexmap 2.13.1",
+ "indexmap 2.14.0",
  "log",
  "serde",
  "serde_derive",
@@ -1103,7 +1109,7 @@ checksum = "ecc8ac4bc1dc3381b7f59c34f00b67e18f910c2c0f50015669dde7def656a736"
 dependencies = [
  "anyhow",
  "id-arena",
- "indexmap 2.13.1",
+ "indexmap 2.14.0",
  "log",
  "semver",
  "serde",
diff --git a/ci/docker/x86_64-unknown-linux-gnu/cpuid.def b/ci/cpuid.def
similarity index 100%
rename from ci/docker/x86_64-unknown-linux-gnu/cpuid.def
rename to ci/cpuid.def
diff --git a/ci/docker/i686-unknown-linux-gnu/Dockerfile b/ci/docker/i686-unknown-linux-gnu/Dockerfile
index 49d5cecc71..e6696f4987 100644
--- a/ci/docker/i686-unknown-linux-gnu/Dockerfile
+++ b/ci/docker/i686-unknown-linux-gnu/Dockerfile
@@ -4,4 +4,16 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   libc6-dev \
   file \
   make \
-  ca-certificates
+  ca-certificates \
+  wget \
+  xz-utils
+
+RUN wget http://ci-mirrors.rust-lang.org/stdarch/sde-external-10.5.0-2026-01-13-lin.tar.xz -O sde.tar.xz
+RUN mkdir intel-sde
+RUN tar -xJf sde.tar.xz --strip-components=1 -C intel-sde
+ENV CARGO_TARGET_I686_UNKNOWN_LINUX_GNU_RUNNER="/intel-sde/sde \
+            -cpuid-in /checkout/ci/cpuid.def \
+            -debugtrace --"
+# SDE doesn't support AMD extensions
+# FIXME: find a way to test these
+ENV STDARCH_TEST_SKIP_FEATURE="sse4a,tbm,xop"
diff --git a/ci/docker/x86_64-unknown-linux-gnu/Dockerfile b/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
index 17c6d25215..eaac30d69f 100644
--- a/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
+++ b/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
@@ -16,7 +16,7 @@ RUN wget http://ci-mirrors.rust-lang.org/sde-external-10.8.0-2026-03-15-lin.tar.
 RUN mkdir intel-sde
 RUN tar -xJf sde.tar.xz --strip-components=1 -C intel-sde
 ENV CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUNNER="/intel-sde/sde64 \
-            -cpuid-in /checkout/ci/docker/x86_64-unknown-linux-gnu/cpuid.def \
+            -cpuid-in /checkout/ci/cpuid.def \
             -rtm-mode full -tsx --"
 # SDE doesn't support AMD extensions
 # FIXME: find a way to test these
diff --git a/ci/run-docker.sh b/ci/run-docker.sh
index 28dfd5a24a..da50b86fc8 100755
--- a/ci/run-docker.sh
+++ b/ci/run-docker.sh
@@ -19,6 +19,8 @@ run() {
     # Prevent `Read-only file system (os error 30)`.
     cargo generate-lockfile
 
+    echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
+
     echo "Building docker container for TARGET=${1}"
     docker build -t stdarch -f "ci/docker/${1}/Dockerfile" ci/
     mkdir -p target c_programs rust_programs
@@ -41,12 +43,14 @@ run() {
       --volume "${HOME}/.cargo":/cargo \
       --volume "$(rustc --print sysroot)":/rust:ro \
       --volume "$(pwd)":/checkout:ro \
+      --volume "$(pwd)"/crates/core_arch:/checkout/crates/core_arch \
       --volume "$(pwd)"/target:/checkout/target \
       --volume "$(pwd)"/c_programs:/checkout/c_programs \
       --volume "$(pwd)"/rust_programs:/checkout/rust_programs \
       --init \
       --workdir /checkout \
       --privileged \
+      --security-opt seccomp=unconfined \
       stdarch \
       sh -c "HOME=/tmp PATH=\$PATH:/rust/bin exec ci/run.sh ${1}"
 }
diff --git a/ci/run.sh b/ci/run.sh
index ea012b42f9..dd9e3ba1be 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -92,7 +92,7 @@ cargo_test() {
 CORE_ARCH="--manifest-path=crates/core_arch/Cargo.toml"
 STDARCH_EXAMPLES="--manifest-path=examples/Cargo.toml"
 
-cargo_test "${CORE_ARCH}"
+cargo_test "${CORE_ARCH}" || cat /checkout/crates/core_arch/sde-debugtrace-out.txt
 
 if [ "$NOSTD" != "1" ]; then
     cargo_test "${STDARCH_EXAMPLES}"