For the sake of your project, u could define a new type of library, other than a dll. Call it what you want. The aim is to store the code image for each function in this "new dll".
To run the code, we load the file with function image(s), decrypt them if we have to, load it into some or other allocated memory, and run. I am not sure what type of memory allocation will be most optimal for running the code though. This you will have to read up on. There may also be other OS related issues with regards to memory management that are not immediately apparent. But asside from that, it can be done.
eg:
// Code segment that we want to run. Takes 2 parameters, adds
// them together, and returns the result.
// This would be our binary image, stored in a file, possibly
// encrypted.
DWORD AddTwoNumbersAndReturnResult_Image[32] =
{
0x0000000C, // Number of dwords to load from index 1.
0x83EC8B55, // Code starts.
0x565344EC,
0xBC7D8D57,
0x000011B9,
0xCCCCB800,
0xABF3CCCC,
0x0308458B,
0x45890C45,
0xFC458BFC,
0x8B5B5E5F,
0x08C25DE5,
0xFFFFFF00 // Code ends.
};
// Type definition for the function signature.
typedef INT (WINAPI* LPFUNC1)(INT,INT);
// First number in the array if the number of dwords to read
// in starting at index 1.
// Allocate memory for 12 dword values. The actual code image is
// 45 bytes.
DWORD* pdwCode = new DWORD[AddTwoNumbersAndReturnResult_Image[0]];
// Read in the code image we are going to run.
// NB: At this stage you may want to decrypt if you have done so.
for(UINT i=0;i<AddTwoNumbersAndReturnResult_Image[0];i++)
{
// Read 1 ahead since index 0 is reserved for number of dword
// values to read in.
pdwCode
= AddTwoNumbersAndReturnResult_Image[i+1];
}
// Declare a function pointer from the typedef function signature
// we already have, and set it to point to our code image.
LPFUNC1 func1 = (LPFUNC1)pdwCode;
// Invoke the function, and get a return value.
n1 = func1(33,44);
PS: This will not work if u have recursive functions in ur app.
