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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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2
Kernel/Process.cpp
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@ -370,7 +370,7 @@ void Process::crash(int signal, FlatPtr ip, bool out_of_memory)
if (out_of_memory) {
dbgln("\033[31;1mOut of memory\033[m, killing: {}", *this);
} else {
if (ip >= KERNEL_BASE && g_kernel_symbols_available) {
if (ip >= kernel_base && g_kernel_symbols_available) {
auto* symbol = symbolicate_kernel_address(ip);
dbgln("\033[31;1m{:p} {} +{}\033[0m\n", ip, (symbol ? symbol->name : "(k?)"), (symbol ? ip - symbol->address : 0));
} else {