bare1

examples/bare1.rs

@@ -59,10 +59,16 @@ fn main() -> ! {
 //    (passing 3 breakpoints)
 //
 //    ** your answer here **
+//    The program hits the first breakpoint again with a callstack
+//    with a lot of elements in the callstack pointing to 0x08000424
+//    local x variable contains various values
 //
 //    What is the `ITM` output.
 //
-//    ** your answer here **
+// Program
+//  received signal SIGTRAP, Trace/breakpoint trap.
+// bare1::__cortex_m_rt_main () at examples/bare1.rs:22
+// 22	        cortex_m::asm::bkpt();
 //
 //    Commit your answer (bare1_1)
 //
@@ -74,16 +80,42 @@ fn main() -> ! {
 //    What is the output of:
 //    > disassemble
 //
-//    ** your answer here **
+//    Please check OUTPUT tab (Adapter Output) for output from openocd
+
+
+// disassemble
+// 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
+//    0x08000426 <+28>:	ldr	r0, [sp, #4]
+//    0x08000428 <+30>:	adds	r0, #1
+//    0x0800042a <+32>:	bcc.n	0x800041a <bare1::__cortex_m_rt_main+16>
+//    0x0800042c <+34>:	movw	r0, #5984	; 0x1760
+//    0x08000430 <+38>:	movt	r0, #2048	; 0x800
+//    0x08000434 <+42>:	movw	r2, #5956	; 0x1744
+//    0x08000438 <+46>:	movt	r2, #2048	; 0x800
+//    0x0800043c <+50>:	movs	r1, #28
+//    0x0800043e <+52>:	bl	0x800053a <core::panicking::panic>
+//    0x08000442 <+56>:	udf	#254	; 0xfe
+// End of assembler dump.
 //
 //    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 instrucations inbetween
 //
 //    Which instruction stores the local variable on the stack.
 //
-//    ** your answer here **
+//    0x0800041a <+16>:	str	r0, [sp, #4]
 //
 //    Commit your answers (bare1_2)
 //
@@ -99,15 +131,25 @@ fn main() -> ! {
 //    What is the output of:
 //    > disassemble
 //
-//    ** your answer here **
+//      Dump of assembler code for function bare1::__cortex_m_rt_main:
+//      0x08000406 <+0>:	sub	sp, #4
+//      0x08000408 <+2>:	mvn.w	r0, #1
+//      0x0800040c <+6>:	str	r0, [sp, #0]
+//      0x0800040e <+8>:	adds	r0, #1
+//      0x08000410 <+10>:	bkpt	0x0000
+//      0x08000412 <+12>:	str	r0, [sp, #0]
+//      => 0x08000414 <+14>:	bkpt	0x0000
+//      0x08000416 <+16>:	ldr	r0, [sp, #0]
+//      0x08000418 <+18>:	b.n	0x800040e <bare1::__cortex_m_rt_main+8>
+//      End of assembler dump.
 //
 //    How many instructions are in between the two `bkpt` instructions.
 //
-//    ** your answer here **
+//    1
 //
 //    Where is the local variable stored?
 //
-//    ** your answer here **
+//    0x08000412 <+12>:	str	r0, [sp, #0]
 //
 //    Is there now any reference to the panic handler?
 //    If not, why is that the case?
@@ -172,9 +214,21 @@ fn main() -> ! {
 //
 //    What is now the disassembly of the loop (in debug/dev mode):
 //
-//    ** your answer here **
-//
-//    commit your answers (bare1_5)
+//         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>:	add	r4, sp, #4
+//         0x08000414 <+10>:	bkpt	0x0000
+//         0x08000416 <+12>:	ldr	r0, [sp, #4]
+//         0x08000418 <+14>:	adds	r0, #1
+//         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>:	b.n	0x8000414 <bare1::__cortex_m_rt_main+10>
+//         End of assembler dump.
+//    commit your answers (bare1_4)
 //
 //    Now restore the `.cargo/config` to its original state.
 //