/* * Multiboot */ .set ALIGN, 1<<0 /* align loaded modules on page boundaries */ .set MEMINFO, 1<<1 /* provide memory map */ .set FLAGS, ALIGN | MEMINFO /* this is the Multiboot 'flag' field */ .set MAGIC, 0x1BADB002 /* 'magic number' lets bootloader find the header */ .set CHECKSUM, -(MAGIC + FLAGS) /* checksum of above, to prove we are multiboot */ .section .multiboot .align 4 .long MAGIC .long FLAGS .long CHECKSUM .section .bss .align 16 stack_bottom: .skip 16384 # 16 KiB stack_top: .section .text .include "./source/kernel/gdt/gdt.s" .include "./source/kernel/irs_table.s" .include "./source/kernel/irq_table.s" .include "./source/kernel/interrupts/idt/idt.s" .include "./source/kernel/memory/paging.s" .global _start .type _start, @function _start: /*Setup the stack pointer to point to the beginning of our stack */ /* I believe its a high address growing down to lower adress for the stack on x86*/ mov $stack_top, %esp /*Reset EFLAGS*/ pushl $0 popf /* push the pointer to the Multiboot information structure*/ pushl %ebx /* push the magic value */ pushl %eax call early_main mov %cr0, %eax or $1, %eax mov %eax, %cr0 call kernel_main cli 1: hlt jmp 1b .size _start, . - _start