From 5ff54a875642962fc857cee00bde17f9a465f1fa Mon Sep 17 00:00:00 2001
From: Bradley Morgan <brads@mainlining.org>
Date: Sun, 4 Oct 2026 10:42:10 +0000
Subject: tashaboot: arm64 bootloader

holy shit it's here, Tashaboot, based from arm arm, enjoy
reading this masterpiece

Signed-off-by: Bradley Morgan <brads@mainlining.org>
---
 arch/arm64/kernel/tashaboot.lds | 91 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 arch/arm64/kernel/tashaboot.lds

(limited to 'arch/arm64/kernel/tashaboot.lds')

diff --git a/arch/arm64/kernel/tashaboot.lds b/arch/arm64/kernel/tashaboot.lds
new file mode 100644
index 0000000..e2b7954
--- /dev/null
+++ b/arch/arm64/kernel/tashaboot.lds
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * tashaboot arm64 memory layout. one segment, loaded at the bottom of
+ * RAM, right where qemu -kernel drops a raw image on virt.
+ *
+ * Copyright (C) 2026 Bradley Morgan <brads@mainlining.org>
+ */
+
+OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64", "elf64-littleaarch64")
+OUTPUT_ARCH(aarch64)
+ENTRY(_start)
+
+SECTIONS
+{
+	/*
+	 * the first 64 bytes are the arm64 Image header: code0 'b' over
+	 * it, magic ARM\x64, text_offset 0. qemu -kernel parses the
+	 * header, loads the file at 0x40000000 and enters at
+	 * 0x40000000, where the branch lands on reset at 0x40000040.
+	 * without the header qemu guesses text_offset 0x80000 and runs
+	 * the whole loader from the wrong address.
+	 */
+	. = 0x40000000;
+
+	__image_copy_start = .;
+	_text_start = .;
+
+	.text :
+	{
+		arch/arm64/kernel/start.o (.text.boot)
+		*(.text.boot)
+
+		/* the Image header, code0 branches over it */
+		. = ALIGN(64);
+		*(.text.imgheader)
+		. = ALIGN(64);
+
+		*(.text*)
+	}
+
+	. = ALIGN(8);
+	__text_end = .;
+
+	.rodata :
+	{
+		*(SORT_BY_ALIGNMENT(.rodata*))
+	}
+
+	. = ALIGN(8);
+	__rodata_end = .;
+
+	.data :
+	{
+		*(.data*)
+	}
+
+	. = ALIGN(8);
+	__image_end = .;
+
+	__bss_start = .;
+	.bss :
+	{
+		*(.bss*)
+		*(COMMON)
+	}
+	. = ALIGN(8);
+	__bss_end = .;
+
+	/*
+	 * the stack lives in its own region, clear of bss. page tables
+	 * and buffers are bss objects, a stack sharing their address
+	 * space grows down into them and the first deep call crushes
+	 * whatever it meets.
+	 */
+	. = ALIGN(4096);
+	__stack_bottom = .;
+	. += 0x4000;
+	__stack_top = .;
+	__image_copy_end = .;
+
+	/DISCARD/ : { *(.dynsym) }
+	/DISCARD/ : { *(.dynstr*) }
+	/DISCARD/ : { *(.dynamic*) }
+	/DISCARD/ : { *(.plt*) }
+	/DISCARD/ : { *(.interp*) }
+	/DISCARD/ : { *(.gnu*) }
+	/DISCARD/ : { *(.ARM.attributes) }
+	/DISCARD/ : { *(.comment) }
+	/DISCARD/ : { *(.note*) }
+	/DISCARD/ : { *(.eh_frame*) }
+}
-- 
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