Questions tagged [assembly]
Assembly language questions. Please tag the processor and/or the instruction set you are using, as well as the assembler, a valid set should be like this: ([assembly] [x86] [gnu-assembler] or [att]). Use the [.net-assembly] tag instead for .NET assemblies, [cil] for .NET assembly language, [wasm] for web assembly, and for Java bytecode, use the tag java-bytecode-asm instead.
assembly
44,635
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When an embedded c program is created, why is there extra machine code around my compiled c program?
This C program blinks an LED attached to an AVR ATmega32u4.
ISR(TIMER1_OVF_vect) // attach Interrupt Sub Routine to TIMER1
{
// toggle LED
PIND = (1 << PIND5); // #define PIND (*(...
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Difference between comiss and comisd in x64 asm
I wrote some code to compare the value of xmm10 and xmm6 using:
comiss xmm10, xmm6 and then comisd xmm10, xmm6
The first one works, and the second one doesn't.
I tried using subss xmm10, xmm6 followed ...
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Why is my array value not equal to a literal?
I am new to assembly and was trying to work with an array. However, I was geting caught when try to compare the array value to a constant stored in a register.
From the following code I was expecting ...
- 2,698
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Printing 2D array in MIPS
I have been using a few other posts on here to try and figure out what I am doing wrong but I am stuck and could use some help. I am making a game that has an 8x8 "board" (2d array) similar ...
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Why does the code show only some white lines when you compiled it?
.MODEL SMALL
.STACK 100h
.DATA
COLUMNA DW ?
FILA DW ?
AVANCEH DW ?
AVANCEV DW ?
.CODE
DETENER_POR_TIEMPO PROC
MOV CX, 2000h
MOV DX, 2000h
MOV BX, 2000h
NOP
RET
DETENER_POR_TIEMPO ...
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How can I get this STDIN to work in GAS Assembler running on Linux?
I am new to Assembler and am currently reading a book about it by Jonathan Bartlett called 'Learn to Program with Assembly'. On pages 160-1 he gives the following sample program to demonstrate the use ...
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1
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What is wrong with this control for the brightness of a lamp in ATmega328P?
I'm new to assembly and I'm trying to develop a control for the brightness of a lamp for my college. The lamp must have 5 distinct levels of brightness, one off and four levels with gradual increase. ...
3
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1
answer
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Are there any negative side-effects to using -mmacosx-version-min and -segalign flags to reduce padding space in an executable?
I noticed that if I compile a C program with the gcc or clang command on macOS 10.15.7 the executable will be around 50 KB, no matter how simple the program. In older versions, the same program ...
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multidimensional slice access performance in golang
I am working on a little and simple game-of-life in Golang and stumbled on a performance problem during slice access.
This is the primary data structure for the game:
type Neighbor struct {
X, Y ...
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data segment of AVR store nonsense after compiling
So i'm trying to change the first element of an array that i'm storing in sram and i checked if the data after compile is equal to the value of pre-initialaztion and it wasn't equal. so this my code:
....
- 3,543
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CMake does not compile asm-files (cross-compile)
We set up our build system with CMake and besides C and C++-files we need to compile asm-files (.s).
We use a tiarmclang-compiler (LTS3.2.0) and thus need to crosscompile.
While everything works for C ...
- 64k
0
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1
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Converting ARM assembly to RISC-V assembly
I am trying to rewrite this code. It works perfectly for ARM assembly, but I am trying to rewrite it in RISC-V assembly. Here is the ARM code:
.text
.global main
.equ ADD1, 0x40000000
.set ADD2, ...
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signal SIGSEGV: address access protected in __run_exit_handlers
I'm trying to do a packer project for my school, it is made in C and ASM, and for the moment it is supposed to target only ELF files.
I have managed to do my section injection, correctly align my new ...
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Why does gdb combine byte values when examining memory as words? [closed]
While examining 4 addresses from $rip as bytes in GDB, it shows 4 individual values. However, when I examine the same addresses as words, it combines that 4 byte values into a single word value. Why ...
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Unable to find 'Software1.dll;Software2.dll' to be lazy loaded later. Confirm that project or package references are included and the reference is u
In a webassembly project I created two Razor Class Libraries Software1 and Software2 and added a reference to both in the main client app.
I also added these to my client's Project file:
<ItemGroup&...
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