From d2eed6978881586c0155d8a13843ee54ed3bf0e6 Mon Sep 17 00:00:00 2001
From: Hammarkvast <tomham-3@student.ltu.se>
Date: Thu, 20 Feb 2020 14:32:34 +0100
Subject: [PATCH] bare1_2
---
examples/bare1.rs | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/examples/bare1.rs b/examples/bare1.rs
index deaf900..cdcbff4 100644
--- a/examples/bare1.rs
+++ b/examples/bare1.rs
@@ -79,16 +79,28 @@ fn main() -> ! {
// > disassemble
//
// ** your answer here **
-//
+// Dump of assembler code for function bare1::__cortex_m_rt_main:
+// 0x0800040a <+0>: sub sp, #8
+// 0x0800040c <+2>: mvn.w r0, #1
+// 0x08000410 <+6>: str r0, [sp, #4]
+// => 0x08000412 <+8>: bkpt 0x0000
+// 0x08000414 <+10>: mov.w r0, #4294967295 ; 0xffffffff
+// 0x08000418 <+14>: add r4, sp, #4
+// 0x0800041a <+16>: str r0, [sp, #4]
+// 0x0800041c <+18>: bkpt 0x0000
+// 0x0800041e <+20>: mov r0, r4
+// 0x08000420 <+22>: bl 0x8000400 <core::ptr::read_volatile>
+// 0x08000424 <+26>: bkpt 0x0000
+
// How many instructions are in between the two `bkpt` instructions in the loop.
// Notice, the generated code may not be exactly what you expect :)
//
// ** your answer here **
-//
+// there are 6 instructions
// Which instruction stores the local variable on the stack.
//
// ** your answer here **
-//
+// str r0 [sp, #4]
// Commit your answers (bare1_2)
//
// 3. Release mode (optimized builds).
--
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