djstub project provides a dj64-compatible and go32-compatible stubs that support COFF, PE and ELF payloads. Its primary target is dj64dev suite, but it can also work with djgpp-built executables.
- It can stubify or re-stub COFF and PE executables. See
djstubify. - It can link the ELF binaries into a dj64 executables. See
djlink. - It can strip the debug info from dj64 executables. See
djstrip.
There are 2 stubs available: full,
which has all the loaders within, and
mini,
which relies on a "DJ64STUB" DPMI extension, which is
supposed to have the same loaders inside DPMI host.
Full stub requires gcc-ia16 to build, and is therefore currently not maintained. Mini stub uses SmallerC and is actively maintained. If you want to use this project outside of dosemu2 (which means djgpp + bare-metal DOS or windows), you may need full stub. Otherwise, mini stub is enough.
$ djstubify -i comcom64.exe
dj64 file format
Overlay 0 (i386/ELF DOS payload) at 23368, size 30548
Overlay 1 (x86_64/ELF host payload) at 53916, size 87048
Overlay 2 (x86_64/ELF host debug info) at 140964, size 174936
Overlay name: comcom64.exe
Stub version: 4
Stub flags: 0x0b07
$ djlink -d dosemu_hello.exe.dbg libtmp.so -n hello.exe -o hello.exe tmp.elf
These examples are documented in a dj64dev project.