Write a simple bootstrap stub

2026-08-25 17:24:39 +03:00
parent 706e5b0127
commit bdb7ada1ed
4 changed files with 48 additions and 1 deletions
@@ -0,0 +1,34 @@
+/* Multiboot header */
+	.set ALIGN, 	1<<0
+	.set MEMINFO, 	1<<1
+	.set FLAGS, 	ALIGN | MEMINFO
+	.set MAGIC, 	0x1BADB002
+	.set CHECKSUM, 	-(MAGIC + FLAGS)
+
+	.section .multiboot
+	.align 4
+	.long MAGIC
+	.long FLAGS
+	.long CHECKSUM
+
+	.section .bss
+	.align 16
+stack_bottom:
+	.skip 16384 /* 16 KiB */
+stack_top:
+
+	.section .text
+	.global _start
+	.type _start, @function
+_start:
+	mov $stack_top, %esp
+
+	/* Initialize processor state here */
+
+	call kernel_main
+
+	cli /* Disable interrupts */
+1:	hlt /* Waits for an interrupt */
+	jmp 1b /* Jump in case an interrupt actually arrives */
+
+	.size _start, . - _start