6 commits

Author	SHA1	Message	Date
Gunnar Beutner	56f952a5f2	Prekernel: Don't assume that PT_LOAD headers are ordered by address ... These headers are ordered by virtual address - at least with GCC - but that might not always be the case.	2021-07-20 15:12:19 +02:00
Gunnar Beutner	be795d5812	Prekernel: Use physical addresses for some of the BootInfo parameters ... The kernel would just turn those virtual addresses into physical addresses later on, so let's just use physical addresses right from the start.	2021-07-20 15:12:19 +02:00
Gunnar Beutner	dd42093b93	Kernel: Move boot info declarations to a header file ... Instead of manually redeclaring those variables in various files this now adds a header file for them.	2021-07-20 15:12:19 +02:00
Gunnar Beutner	69fd68b1c8	Prekernel: Make sure we're not overwriting the ELF header ... This copies the ELF header because we might end up overwriting when loading the ELF sections.	2021-07-20 01:50:55 +02:00
Gunnar Beutner	3678f78bfb	Prekernel: Make sure the last few bytes of the kernel image are mapped ... Depending on the exact layout of the .ksyms section the kernel would fail to boot because the kernel_load_end variable didn't account for the section's size.	2021-07-19 17:47:54 +02:00
Gunnar Beutner	7e94b090fe	Kernel: Introduce basic pre-kernel environment ... 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>	2021-07-18 17:31:13 +02:00