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Kernel: Introduce basic pre-kernel environment

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This implements a simple bootloader that is capable of loading ELF64
kernel images. It does this by using QEMU/GRUB to load the kernel image
from disk and pass it to our bootloader as a Multiboot module.

The bootloader then parses the ELF image and sets it up appropriately.
The kernel's entry point is a C++ function with architecture-native
code.

Co-authored-by: Liav A <liavalb@gmail.com>
This commit is contained in:
Gunnar Beutner 2021-07-18 14:47:32 +02:00 • committed by Andreas Kling
parent 357ddd393e
commit 7e94b090fe
30 changed files with 1207 additions and 181 deletions
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3
Kernel/Arch/x86/i386/Boot/ap_setup.S
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@ -1,4 +1,3 @@
#define _BOOTLOADER
#include <Kernel/Sections.h>
.extern init_ap
@ -110,7 +109,7 @@ apic_ap_start32_2:
/* push the Processor pointer this CPU is going to use */
movl (ap_cpu_init_processor_info_array - apic_ap_start)(%ebp), %eax
addl $KERNEL_BASE, %eax
addl kernel_base, %eax
movl 0(%eax, %esi, 4), %eax
push %eax