python (12.9k questions)

javascript (9.2k questions)

reactjs (4.7k questions)

java (4.2k questions)

java (4.2k questions)

c# (3.5k questions)

c# (3.5k questions)

html (3.3k questions)

Questions - arm

Is instruction encoded differently from .so file to runtime memory?

I have an Android .so file that uses ARM-V7A instruction set. I drag it into IDA, and there is one line that shows : 0x1000: b #0x102c And the hex window shows that the binary code of b #0x102c is 14...
test-img

user16387400

assembly

arm

disassembly

ida

instruction-encoding

Votes: 0

Answers: 1

Latest Answer

Looks like IDA is breaking it into bytes so you'd expect the low 8 bits to be first, as a byte-stream. 14 e0 is the same thing as little-endian e014, a single 16-bit halfword. (IDA was probably first...
test-img

Peter Cordes

Volatile variable not updated despite unoptimized assembly

I'm working on a dual-core Cortex-R52 ARM chip, with an instance of FreeRTOS running in each core (AMP), and using ICCARM (IAR) as my compiler. I need to ensure that CPU1 initialize some tasks, in ord...
test-img

BowTieping

c

arm

freertos

iar

Votes: 0

Answers: 0

ARM NEON: Convert a binary 8-bit-per-pixel image (only 0/1) to 1-bit-per-pixel?

I am working on a task to convert a large binary label image, which has 8 bits (uint8_t) per pixel and each pixel can only be 0 or 1 (or 255), to an array of uint64_t numbers and each bit in uint64_t ...
test-img

debug_all_the_time

arm

neon

Votes: 0

Answers: 3

Latest Answer

Assuming the input value is either 0 or 255, below is the basic version which is rather straightforward, especially for people with Intel SSE/AVX experience. void foo_basic(uint8_t *pDst, uint8_t *pSr...
test-img

Jake 'Alquimista' LEE

ldr.w instruction causing unaligned access hardfault on ARM Cortex-M7 with Thumb2

I am getting a unaligned access hardfault on the ldr.w instruction with Thumb2 on ARM Cortex-M7. The microcontroller is an STM32H745xx and I am using STM32CubeIDE. I am using the STM32 arm-eabi-none-g...
test-img

ethorn

arm

stm32

cortex-m

thumb

stm32cubeide

Votes: 0

Answers: 0

Posts

Questions

Blogs

Jobs