i686 toolkit

How to build and run ?

1. Install the dependencies

• python >=3.11.0
• pip

2. Install / Use the lib or just run the scripts in scripts/

Lib install

python3 setup.py bdist_wheel
pip3 install dist/ostools-0.0.1-py3-none-any.whl

Usage example

Build and dump/save a GDT

from ostools.gdt import Gdt
from ostools.gdt import GdtEntry
from ostools.gdt import GdtAccessByte
from ostools.gdt import GdtFlags
from ostools.gdt import CpuPrivilevel

a = Gdt() \
.add_entry(
    GdtEntry("gdt_code")
    .set_access_byte(
        GdtAccessByte(0x9a)
    )
    .set_flags(GdtFlags())
) \
.add_entry( 
    GdtEntry("gdt_data")
    .set_access_byte(
        GdtAccessByte()
            .set_p(True)
            .set_dpl(CpuPrivilevel.RING0)
            .set_s(True)
            .set_rw(True)
    )
    .set_flags(0xcf)
) \
.add_end() \
.add_descriptor() \
.dump_asm() # or .save_asm("test.asm")

Convert a Linux PC Screen Font to x86 assembly data

from ostools.psf import Psf

a = Psf("ter-v32n.psf") \
.parse() \
.save_asm("test.asm")

Scripts

The directory scripts/ contains scripts intended to do metaprogramming. Most of them concern the 32 bits interrupts.