From 062ef5894459fec07e9aa5a0a69fcba281b33998 Mon Sep 17 00:00:00 2001
From: Dominik Boehi <dominik.boehi@nordicsemi.no>
Date: Wed, 28 Aug 2024 16:02:41 +0200
Subject: [PATCH 1/2] Allow up to 496 interrupts on ARMv8-M

---
 cortex-m-rt/build.rs   |  2 +-
 cortex-m-rt/src/lib.rs | 19 ++++++++++++++++---
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/cortex-m-rt/build.rs b/cortex-m-rt/build.rs
index 2a1406cf..9575a537 100644
--- a/cortex-m-rt/build.rs
+++ b/cortex-m-rt/build.rs
@@ -59,7 +59,7 @@ INCLUDE device.x"#
     } else if target.starts_with("thumbv8m") {
         println!("cargo:rustc-cfg=cortex_m");
         println!("cargo:rustc-cfg=armv8m");
-        240
+        496
     } else {
         // Non ARM target. We assume you're just testing the syntax.
         // This value seems as good as any.
diff --git a/cortex-m-rt/src/lib.rs b/cortex-m-rt/src/lib.rs
index 7db49d43..8f1207a3 100644
--- a/cortex-m-rt/src/lib.rs
+++ b/cortex-m-rt/src/lib.rs
@@ -258,8 +258,8 @@
 //!
 //! - `__INTERRUPTS`. This is the device specific interrupt portion of the vector table; its exact
 //!   size depends on the target device but if the `"device"` feature has not been enabled it will
-//!   have a size of 32 vectors (on ARMv6-M) or 240 vectors (on ARMv7-M). This array is located after
-//!   `__EXCEPTIONS` in the `.vector_table` section.
+//!   have a size of 32 vectors (on ARMv6-M), 240 vectors (on ARMv7-M) or 496 vectors (on ARMv8-M).
+//!   This array is located after `__EXCEPTIONS` in the `.vector_table` section.
 //!
 //! - `__pre_init`. This is a function to be run before RAM is initialized. It defaults to an empty
 //!   function. As this runs before RAM is initialised, it is not sound to use a Rust function for
@@ -1234,7 +1234,7 @@ pub static __EXCEPTIONS: [Vector; 14] = [
 
 // If we are not targeting a specific device we bind all the potential device specific interrupts
 // to the default handler
-#[cfg(all(any(not(feature = "device"), test), not(armv6m)))]
+#[cfg(all(any(not(feature = "device"), test), not(armv6m), not(armv8m)))]
 #[doc(hidden)]
 #[cfg_attr(cortex_m, link_section = ".vector_table.interrupts")]
 #[no_mangle]
@@ -1246,6 +1246,19 @@ pub static __INTERRUPTS: [unsafe extern "C" fn(); 240] = [{
     DefaultHandler
 }; 240];
 
+// ARMv8-M can have up to 496 device specific interrupts
+#[cfg(all(any(not(feature = "device")), armv8m))]
+#[doc(hidden)]
+#[cfg_attr(cortex_m, link_section = ".vector_table.interrupts")]
+#[no_mangle]
+pub static __INTERRUPTS: [unsafe extern "C" fn(); 496] = [{
+    extern "C" {
+        fn DefaultHandler();
+    }
+
+    DefaultHandler
+}; 496];
+
 // ARMv6-M can only have a maximum of 32 device specific interrupts
 #[cfg(all(not(feature = "device"), armv6m))]
 #[doc(hidden)]

From 7d57d0844f236cb8eb1c134350f01132aca26f40 Mon Sep 17 00:00:00 2001
From: Dominik Boehi <dominik.boehi@nordicsemi.no>
Date: Wed, 28 Aug 2024 16:07:00 +0200
Subject: [PATCH 2/2] Fix clippy warning

---
 cortex-m-rt/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cortex-m-rt/src/lib.rs b/cortex-m-rt/src/lib.rs
index 8f1207a3..615c96c2 100644
--- a/cortex-m-rt/src/lib.rs
+++ b/cortex-m-rt/src/lib.rs
@@ -1247,7 +1247,7 @@ pub static __INTERRUPTS: [unsafe extern "C" fn(); 240] = [{
 }; 240];
 
 // ARMv8-M can have up to 496 device specific interrupts
-#[cfg(all(any(not(feature = "device")), armv8m))]
+#[cfg(all(not(feature = "device"), armv8m))]
 #[doc(hidden)]
 #[cfg_attr(cortex_m, link_section = ".vector_table.interrupts")]
 #[no_mangle]