Before importing the file, you must identify the CPU architecture. If you know the physical chip the UF2 file was compiled for, you can look up its core architecture. ARM Cortex-M0+ (Thumb mode) Adafruit Feathers / SAMD21: ARM Cortex-M0+ (Thumb mode) SAMD51: ARM Cortex-M4 (Thumb mode) ESP32-S2 / ESP32-S3: Xtensa LX7 Step 3: Importing and Memory Mapping in Ghidra
(usually up to 256 bytes of actual machine code).
: Import your .bin file into Ghidra. You’ll need to specify the Base Address (for an RP2040, this is typically 0x10000000 ).
: A collection of scripts that help unpack and inspect blocks. uf2 decompiler
The tool parses the 512-byte blocks to extract the raw data payloads. It uses the address information in each block header to reconstruct a contiguous binary image ( .bin or .hex ).
Inspecting suspicious firmware for "phone-home" bugs or backdoors. Interoperability:
void _start(void) uint32_t uVar1; uVar1 = *0x20000000; if ((uVar1 & 0x20000000) != 0) // setup clocks... Before importing the file, you must identify the
To fix the memory-mapping issue, use a plugin in Ghidra or IDA to load a System View Description (SVD) file. This file automatically names the peripheral registers based on the official chip specifications. Is True Decompilation Possible?
– Studying compiler optimizations across UF2-flashed firmware from different vendors.
that gives back your source code. What you can do is extract the machine code → disassemble → decompile to rough C using Ghidra. The result will be functional but far from the original – useful for security analysis or low‑level learning, not for recovery of nice, readable code. : Import your
For ARM Cortex-M architectures, the Vector Table sits at the very beginning of the mapped flash memory address:
Embedded C code interacts directly with hardware registers to control GPIO pins, SPI, I2C, or UART buses. By cross-referencing observed memory reads/writes with the target microcontroller's datasheet, you can identify function purposes.