From 96fbd8961ef748b0516f1ebd55ff73f150d0e3f7 Mon Sep 17 00:00:00 2001
From: Jorge Aparicio <jorge@japaric.io>
Date: Wed, 25 Jul 2018 19:48:44 -0500
Subject: [PATCH] cmsis: add __BKPT

---
 coresimd/arm/cmsis.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/coresimd/arm/cmsis.rs b/coresimd/arm/cmsis.rs
index e1913df67d..555ab77dc6 100644
--- a/coresimd/arm/cmsis.rs
+++ b/coresimd/arm/cmsis.rs
@@ -327,3 +327,14 @@ pub unsafe fn __DSB() {
 pub unsafe fn __DMB() {
     asm!("dmb 0xF" : : : "memory" : "volatile");
 }
+
+/// Breakpoint
+///
+/// Causes the processor to enter Debug state. Debug tools can use this to investigate system state
+/// when the instruction at a particular address is reached.
+#[inline]
+#[target_feature(enable = "mclass")]
+#[cfg_attr(test, assert_instr(bkpt))]
+pub unsafe fn __BKPT(value: u8) {
+    asm!("bkpt $0" : : "i"(value) : : "volatile")
+}