Toro Kernel

From Free Pascal wiki
Revision as of 07:42, 24 August 2019 by Skalogryz (talk | contribs) (Building)

A dedicated kernel for multi-threading applications

On Windows

It's possible to develop Toro Kernel microservices on Windows.


  • you'll need to have cross-compile linux binary utils
those could be acquired from fpcup or fpcupdeluxe (
  • the project contain "build" utility complication as well. The utiltiy produces an image from the resulting .elf file

Running QEMU

  • install QEmu for Windows
  • run the system specifying the built image
qemu-system-x86_64 -hda HelloWorldMicroservice.img
  • on start qemu can complain about unknown or raw format of ".img" file.
One might find the script files to build the Qemu recognizable image file formats: BuildVHDX.cmd and/or BuildVMDK.cmd


QEmu provides a built-in support for GDB remote debuggin


  • run QEmu with enabling gdb (-s) and also requesting the QEmu to halt until getting the "continue" signal from gdb (-S)
qemu-system-x86_64 -s -S -hda HelloWorldMicroservice.img
The expected result is that Qemu window will halt with the message that "vga" system has not been initialized yet (and doing nothing)
-s - configures the default remote GDB mode for the use of TCP socket for port 1234
  • run the debugger, and provide the previously complied binary file as its gdb target. (The file is needed to load debugging information)
gdb HelloWorldMicroservice
  • after that run the remote target command
(gdb)> target remote localhost:1234
The command makes gdb connect to the specified address. In which case this would be Qemu running locally at port 1234.
  • setup the debugging information (i.e. breakpoints, etc)
The debugging information in the compiled binary contains the information necessary to work with binary during debugging.
(gdb)> b HelloWorldMicroservice.pas:250
sets a breakpoint HelloWorldMicroservice at the line that outputs "ToroService: listening on port xxxx ..."
  • "continue" the process.
(gdb)> continue

See Also