added support for Cortex-M33 (nRF5340 app core)

CMakeLists.txt

@@ -26,6 +26,14 @@ elseif(${ARCH} STREQUAL "arm")
             set(rust_target thumbv7em-zephyr-eabi)
             set(clang_target thumbv7em-unknown-none-eabi)
         endif()
+    elseif(CONFIG_ARMV8_M_MAINLINE)
+        if(CONFIG_FPU)
+            set(rust_target thumbv8m.main-zephyr-eabihf)
+            set(clang_target thumbv8m.main-unknown-none-eabihf)
+        else()
+            set(rust_target thumbv8m.main-zephyr-eabi)
+            set(clang_target thumbv8m.main-unknown-none-eabi)
+        endif()
     else()
         set(rust_target thumbv7m-zephyr-eabi)
         set(clang_target thumbv7m-none-eabi)

rust/targets/thumbv8m.main-zephyr-eabi.json

@@ -0,0 +1,20 @@
+{
+  "abi": "eabi",
+  "arch": "arm",
+  "c-enum-min-bits": 8,
+  "data-layout": "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64",
+  "emit-debug-gdb-scripts": false,
+  "frame-pointer": "always",
+  "linker": "rust-lld",
+  "linker-flavor": "ld.lld",
+  "llvm-target": "thumbv8m.main-none-eabi",
+  "max-atomic-width": 32,
+  "panic-strategy": "abort",
+  "relocation-model": "static",
+  "target-pointer-width": "32",
+  "target-family": "zephyr",
+  "os": "zephyr",
+  "position-independent-executables": "false",
+  "dynamic-linking": "false",
+  "has-thread-local": "false"
+}

rust/targets/thumbv8m.main-zephyr-eabihf.json

@@ -0,0 +1,21 @@
+{
+  "abi": "eabihf",
+  "arch": "arm",
+  "c-enum-min-bits": 8,
+  "data-layout": "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64",
+  "emit-debug-gdb-scripts": false,
+  "features": "+fp-armv8,-fp64,-d32",
+  "frame-pointer": "always",
+  "linker": "rust-lld",
+  "linker-flavor": "ld.lld",
+  "llvm-target": "thumbv8m.main-none-eabihf",
+  "max-atomic-width": 32,
+  "panic-strategy": "abort",
+  "relocation-model": "static",
+  "target-pointer-width": "32",
+  "target-family": "zephyr",
+  "os": "zephyr",
+  "position-independent-executables": "false",
+  "dynamic-linking": "false",
+  "has-thread-local": "false"
+}

rust/targets/update-targets.sh

@@ -11,6 +11,8 @@ thumbv7em-zephyr-eabi
 thumbv7m-zephyr-eabi
 thumbv7r-zephyr-eabihf
 thumbv7r-zephyr-eabi
+thumbv8m.main-zephyr-eabi
+thumbv8m.main-zephyr-eabihf
 )
 
 for target in "${targets[@]}"; do