Macho loader - Mac OS x64
<Bare Bones>
for Mac OS
the generated files main & libtest.dylib
is 8kb
<each>
only .
this code work with mini FPC core librarys < load macho from memory with socket connection >
The macho loader requires access to some system functions
(e.g., NSCreateObjectFileImageFromMemory
, NSLinkModule
)
-
we first walk to the very top of the stack.
-
We then start walking downwards on the stack and we inspect
every pointer we find.
-
The trick is that the offset inside of libdyld.dylib must be
present as it's placed there by the dynamic linker as the
return function when main returns.
-
We find the offset, we resolve the functions and from then on,
it's standard loading of macho bundle .
that are provided by libdyld.dylib. As we don't know the address of libdyld.dylib in memory .
we first walk to the very top of the stack.
We then start walking downwards on the stack and we inspect
every pointer we find.
The trick is that the offset inside of libdyld.dylib must be
present as it's placed there by the dynamic linker as the
return function when main returns.
We find the offset, we resolve the functions and from then on,
it's standard loading of macho bundle .
"Core/loadfunctions.pas"
in loadall()
.
the main logic start at this works only with x64 macho files .
Requirements
How to Build
- Just run
./Build.sh
after installing FreePascal - run
node server.js
- run
./main