Uf2 Decompiler -

Unlike an ELF file, a raw binary does not have an entry point header telling the decompiler where main() is. You must find it manually.

For RP2040 / ARM Cortex-M: The vector table is usually at the start of the binary.

Ghidra will produce a pseudo-C representation. It is not the original source code, but a functional equivalent. uf2 decompiler

What you will see:

void reset_handler(void) 
  uint32_t *src = &_sfixed;
  uint32_t *dst = &_data_start;
  while (dst < &_data_end) *dst++ = *src++;
  // ... call main()

What you will not see:

To improve readability:

Before we go further, we need to clear up a common misconception. You cannot "decompile a UF2 file" for the same reason you cannot "un-zip a JPEG." Unlike an ELF file, a raw binary does

When you ask for a "UF2 decompiler," you are actually asking for two distinct, sequential operations:

The first operation is trivial. The second operation is one of the hardest problems in computer science. Ghidra will produce a pseudo-C representation

You cannot feed a .uf2 file directly into a decompiler like Ghidra or IDA Pro. You must strip the container headers and reconstruct the raw firmware image.