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License COS under GPLv2 (#64)
* Add the GPLv2 license * Add license headers to all files * Add license headers to libcos * Add license headers to the two user applications * Add license disclaimer at README * Add license headers to assembly files
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‎LICENSE‎

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‎README.md‎

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This will generate a file `image.iso` inside your working directory. Use VMWare or your favourite VM emulator (or put it on a liveCD if you're brave enough) to run and test it out. Or run `qemu.sh` to run it on QEMU.
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![An image of COS saying 'Hello, world!'](images/hello%20world%20with%20cosh.png)
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## License
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This project is released under the GPLv2 license. To find out more, read [LICENSE](LICENSE).

‎kernel/include/kclib/ctype.h‎

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/*
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* ctype.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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int isalnum (int c);

‎kernel/include/kclib/stdio.h‎

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/*
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* stdio.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdarg.h>

‎kernel/include/kclib/string.h‎

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/*
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* string.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stddef.h>

‎kernel/include/kernel/acpi/acpi.h‎

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/*
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* acpi.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdint.h>

‎kernel/include/kernel/acpi/acpi_common.h‎

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/*
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* acpi_common.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdint.h>

‎kernel/include/kernel/acpi/fadt.h‎

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/*
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* fadt.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <kernel/acpi/acpi_common.h>

‎kernel/include/kernel/acpi/madt.h‎

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/*
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* madt.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <kernel/acpi/acpi_common.h>

‎kernel/include/kernel/acpi/rsdp.h‎

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/*
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* rsdp.h
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* Copyright (C) 2026 Aditya Kumar
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with this program; if
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* not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdint.h>

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