From 32ff44d9511bed86104698dff1907577dbd5a0f0 Mon Sep 17 00:00:00 2001 From: Danny Holman Date: Wed, 15 Oct 2025 19:51:55 -0500 Subject: bootstrap: stage1: create a baseline environment Create a baseline booting environment in the first stage. This should allow booting on UEFI-aware systems and load the second stage in. Signed-off-by: Danny Holman --- bootstrap/stage1/arch/x86_64/asm/__chkstk.s | 25 +++++++++++++++++++++++++ bootstrap/stage1/arch/x86_64/asm/entry.s | 25 +++++++++++++++++++++++++ 2 files changed, 50 insertions(+) create mode 100644 bootstrap/stage1/arch/x86_64/asm/__chkstk.s create mode 100644 bootstrap/stage1/arch/x86_64/asm/entry.s (limited to 'bootstrap/stage1/arch') diff --git a/bootstrap/stage1/arch/x86_64/asm/__chkstk.s b/bootstrap/stage1/arch/x86_64/asm/__chkstk.s new file mode 100644 index 0000000..7d5f0c4 --- /dev/null +++ b/bootstrap/stage1/arch/x86_64/asm/__chkstk.s @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2025 Danny Holman + * + * This file is part of BoxOS, a free and open-source Unix-like operating + * system. + * + * BoxOS is free software; you can redistribute it and/or modify under the + * terms of the GNU General Public License as published by the Free Software + * Foundation; either version 2 of the License, or (at your option) any later + * version. + * + * BoxOS is distributed in the hope it will be useful, but WITHOUT ANY WARRANTY; + * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A + * PARTICULAR PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along with + * BoxOS; if not, see . + */ + +.section .text + +# FIXME: this causes GP faults under certain conditions +.global __chkstk +__chkstk: + ret diff --git a/bootstrap/stage1/arch/x86_64/asm/entry.s b/bootstrap/stage1/arch/x86_64/asm/entry.s new file mode 100644 index 0000000..05797ca --- /dev/null +++ b/bootstrap/stage1/arch/x86_64/asm/entry.s @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2025 Danny Holman + * + * This file is part of BoxOS, a free and open-source Unix-like operating + * system. + * + * BoxOS is free software; you can redistribute it and/or modify under the + * terms of the GNU General Public License as published by the Free Software + * Foundation; either version 2 of the License, or (at your option) any later + * version. + * + * BoxOS is distributed in the hope it will be useful, but WITHOUT ANY WARRANTY; + * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A + * PARTICULAR PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along with + * BoxOS; if not, see . + */ + +.section .text + +.global _start +_start: + call efi_main + ret -- cgit v1.2.3