gistfile1.txt

// GetFramePointer (ASM)
.globl GetFramePointer
GetFramePointer:
  mov rp, fp
  mov pc, lr

// Walk the stack
struct FramePointer
{
  pointer_t FP;
  pointer_t SP;
  pointer_t LR;
  pointer_t PC;
};

static void GetSymbolName(pointer_t ptr, AsciiString& outString)
{
  pointer_t   addressList[] = { ptr, NULL };
  uint8_t**   symbolList    = backtrace_symbols(addressList, 1);
  
  outString = AsciiString::FromCString(symbolList[0]);
}

static void GetCallStack(uint32_t depth, DynamicArray<AsciiString>& outCallStack)
{
  pointer_t top = GetFramePointer();
  
  for (uint32_t i = 0; i < depth; ++i) {
    FramePointer* frame = reinterpret_cast<FramePointer*>(top) - sizeof(FramePointer);
    
    AsciiString symbolName;
    
    if (i == 0)           GetSymbolName(frame->PC, symbolName);
    if (frame->FP != 0)   GetSymbolName(frame->LR, symbolName);
    else                  GetSymbolName(frame->PC, symbolName);
    
    outCallStack.Add(symbolName);
    
    top = frame->FP;
    
    if (!ValidateFramePointer(top))
      break;
  }
}