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Commit 33c5a4ec authored by anttib-5's avatar anttib-5
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bare1_2

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with 33 additions and 82 deletions
examples/bare1.rs
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− 82
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...@@ -24,8 +24,8 @@ fn main() -> ! { ...@@ -24,8 +24,8 @@ fn main() -> ! {
let mut _x = 0; let mut _x = 0;
loop { loop {
_x += 1; _x += 1;
cortex_m::asm::nop(); //cortex_m::asm::nop();
cortex_m::asm::bkpt(); //cortex_m::asm::bkpt();
_x -= 1; _x -= 1;
} }
} }
...@@ -68,32 +68,37 @@ fn main() -> ! { ...@@ -68,32 +68,37 @@ fn main() -> ! {
// //
// What is the output of: // What is the output of:
// (gdb) disassemble // (gdb) disassemble
// //Dump of assembler code for function main:
//Dump of assembler code for function Reset: // 0x08000400 <+0>: sub sp, #16
// => 0x08000616 <+0>: bl 0x8000686 <DefaultPreInit> // 0x08000402 <+2>: movs r0, #0
// 0x0800061a <+4>: b.n 0x800061c <Reset+6> // 0x08000404 <+4>: str r0, [sp, #12]
// 0x0800061c <+6>: movw r0, #0 // 0x08000406 <+6>: b.n 0x8000408 <main+8>
// 0x08000620 <+10>: movt r0, #8192 ; 0x2000 // 0x08000408 <+8>: ldr r0, [sp, #12]
// 0x08000624 <+14>: movw r1, #0 // 0x0800040a <+10>: adds r1, r0, #1
// 0x08000628 <+18>: movt r1, #8192 ; 0x2000 // 0x0800040c <+12>: mov r2, r1
// 0x0800062c <+22>: bl 0x8000688 <r0::zero_bss> // 0x0800040e <+14>: cmp r1, r0
// 0x08000630 <+26>: b.n 0x8000632 <Reset+28> // 0x08000410 <+16>: str r2, [sp, #8]
// 0x08000632 <+28>: movw r0, #0 // 0x08000412 <+18>: bvs.n 0x800042c <main+44>
// 0x08000636 <+32>: movt r0, #8192 ; 0x2000 // 0x08000414 <+20>: b.n 0x8000416 <main+22>
// 0x0800063a <+36>: movw r1, #0 // 0x08000416 <+22>: ldr r0, [sp, #8]
// 0x0800063e <+40>: movt r1, #8192 ; 0x2000 // 0x08000418 <+24>: str r0, [sp, #12]
// 0x08000642 <+44>: movw r2, #2580 ; 0xa14 // 0x0800041a <+26>: ldr r1, [sp, #12]
// 0x08000646 <+48>: movt r2, #2048 ; 0x800 // 0x0800041c <+28>: subs r2, r1, #1
// 0x0800064a <+52>: bl 0x80006d0 <r0::init_data> // 0x0800041e <+30>: cmp r1, #1
// 0x0800064e <+56>: b.n 0x8000650 <Reset+58> // 0x08000420 <+32>: str r2, [sp, #4]
// 0x08000650 <+58>: movw r0, #60808 ; 0xed88 // 0x08000422 <+34>: bvs.n 0x800043a <main+58>
// 0x08000654 <+62>: movt r0, #57344 ; 0xe000 // 0x08000424 <+36>: b.n 0x8000426 <main+38>
// 0x08000658 <+66>: ldr r1, [r0, #0] // 0x08000426 <+38>: ldr r0, [sp, #4]
// 0x0800065a <+68>: orr.w r1, r1, #15728640 ; 0xf00000 // 0x08000428 <+40>: str r0, [sp, #12]
// 0x0800065e <+72>: bl 0x800074a <core::ptr::write_volatile> // => 0x0800042a <+42>: b.n 0x8000408 <main+8>
// 0x08000662 <+76>: b.n 0x8000664 <Reset+78> // 0x0800042c <+44>: movw r0, #2268 ; 0x8dc
// 0x08000664 <+78>: bl 0x800066a <ResetTrampoline> // 0x08000430 <+48>: movt r0, #2048 ; 0x800
// 0x08000668 <+82>: udf #254 ; 0xfe // 0x08000434 <+52>: bl 0x800045c <panic>
// 0x08000438 <+56>: udf #254 ; 0xfe
// 0x0800043a <+58>: movw r0, #2340 ; 0x924
// 0x0800043e <+62>: movt r0, #2048 ; 0x800
// 0x08000442 <+66>: bl 0x800045c <panic>
// 0x08000446 <+70>: udf #254 ; 0xfe
// End of assembler dump. // End of assembler dump.
// //
// Commit your answers (bare1_2) // Commit your answers (bare1_2)
...@@ -104,32 +109,6 @@ fn main() -> ! { ...@@ -104,32 +109,6 @@ fn main() -> ! {
// What is the output of: // What is the output of:
// (gdb) disassemble // (gdb) disassemble
// //
//Dump of assembler code for function Reset:
// => 0x0800061e <+0>: bl 0x800068e <DefaultPreInit>
// 0x08000622 <+4>: b.n 0x8000624 <Reset+6>
// 0x08000624 <+6>: movw r0, #0
// 0x08000628 <+10>: movt r0, #8192 ; 0x2000
// 0x0800062c <+14>: movw r1, #0
// 0x08000630 <+18>: movt r1, #8192 ; 0x2000
// 0x08000634 <+22>: bl 0x8000690 <r0::zero_bss>
// 0x08000638 <+26>: b.n 0x800063a <Reset+28>
// 0x0800063a <+28>: movw r0, #0
// 0x0800063e <+32>: movt r0, #8192 ; 0x2000
// 0x08000642 <+36>: movw r1, #0
// 0x08000646 <+40>: movt r1, #8192 ; 0x2000
// 0x0800064a <+44>: movw r2, #2580 ; 0xa14
// 0x0800064e <+48>: movt r2, #2048 ; 0x800
// 0x08000652 <+52>: bl 0x80006d8 <r0::init_data>
// 0x08000656 <+56>: b.n 0x8000658 <Reset+58>
// 0x08000658 <+58>: movw r0, #60808 ; 0xed88
// 0x0800065c <+62>: movt r0, #57344 ; 0xe000
// 0x08000660 <+66>: ldr r1, [r0, #0]
// 0x08000662 <+68>: orr.w r1, r1, #15728640 ; 0xf00000
// 0x08000666 <+72>: bl 0x8000752 <core::ptr::write_volatile>
// 0x0800066a <+76>: b.n 0x800066c <Reset+78>
// 0x0800066c <+78>: bl 0x8000672 <ResetTrampoline>
// 0x08000670 <+82>: udf #254 ; 0xfe
// End of assembler dump.
// //
// Commit your answers (bare1_3) // Commit your answers (bare1_3)
// //
...@@ -139,32 +118,6 @@ fn main() -> ! { ...@@ -139,32 +118,6 @@ fn main() -> ! {
// What is the output of: // What is the output of:
// (gdb) disassemble // (gdb) disassemble
// //
// Dump of assembler code for function Reset:
// => 0x08000622 <+0>: bl 0x8000692 <DefaultPreInit>
// 0x08000626 <+4>: b.n 0x8000628 <Reset+6>
// 0x08000628 <+6>: movw r0, #0
// 0x0800062c <+10>: movt r0, #8192 ; 0x2000
// 0x08000630 <+14>: movw r1, #0
// 0x08000634 <+18>: movt r1, #8192 ; 0x2000
// 0x08000638 <+22>: bl 0x8000694 <r0::zero_bss>
// 0x0800063c <+26>: b.n 0x800063e <Reset+28>
// 0x0800063e <+28>: movw r0, #0
// 0x08000642 <+32>: movt r0, #8192 ; 0x2000
// 0x08000646 <+36>: movw r1, #0
// 0x0800064a <+40>: movt r1, #8192 ; 0x2000
// 0x0800064e <+44>: movw r2, #2580 ; 0xa14
// 0x08000652 <+48>: movt r2, #2048 ; 0x800
// 0x08000656 <+52>: bl 0x80006dc <r0::init_data>
// 0x0800065a <+56>: b.n 0x800065c <Reset+58>
// 0x0800065c <+58>: movw r0, #60808 ; 0xed88
// 0x08000660 <+62>: movt r0, #57344 ; 0xe000
// 0x08000664 <+66>: ldr r1, [r0, #0]
// 0x08000666 <+68>: orr.w r1, r1, #15728640 ; 0xf00000
// 0x0800066a <+72>: bl 0x8000756 <core::ptr::write_volatile>
// 0x0800066e <+76>: b.n 0x8000670 <Reset+78>
// 0x08000670 <+78>: bl 0x8000676 <ResetTrampoline>
// 0x08000674 <+82>: udf #254 ; 0xfe
// End of assembler dump.
// //
// Commit your answers (bare1_4) // Commit your answers (bare1_4)
// //
...@@ -177,8 +130,6 @@ fn main() -> ! { ...@@ -177,8 +130,6 @@ fn main() -> ! {
// Compare the generated assembly for the loop // Compare the generated assembly for the loop
// between the dev (unoptimized) and release (optimized) build. // between the dev (unoptimized) and release (optimized) build.
// //
// The optimized assembly code is much longer (so long that I could not even copy it)
// It is longer since it executes instructions that the non-optimized does not make
// //
// commit your answers (bare1_5) // commit your answers (bare1_5)
// //
......
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