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Kernel/x86: Bake the Prekernel and the Kernel into one image

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The new baked image is a Prekernel and a Kernel baked together now, so
essentially we no longer need to pass the Prekernel as -kernel and the
actual  kernel image as -initrd to QEMU, leaving the option to pass an
actual initrd or initramfs module later on with multiboot.
This commit is contained in:
Liav A 2023-03-24 20:31:53 +03:00 • committed by Jelle Raaijmakers
parent 2a1e58f8cc
commit 897c4e5145
10 changed files with 81 additions and 50 deletions
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13
Kernel/Arch/init.cpp
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@ -84,9 +84,6 @@ extern "C" u8 end_of_safemem_atomic_text[];
extern "C" u8 end_of_kernel_image[];
multiboot_module_entry_t multiboot_copy_boot_modules_array[16];
size_t multiboot_copy_boot_modules_count;
READONLY_AFTER_INIT bool g_in_early_boot;
namespace Kernel {
@ -137,8 +134,10 @@ READONLY_AFTER_INIT char const* kernel_cmdline;
READONLY_AFTER_INIT u32 multiboot_flags;
READONLY_AFTER_INIT multiboot_memory_map_t* multiboot_memory_map;
READONLY_AFTER_INIT size_t multiboot_memory_map_count;
READONLY_AFTER_INIT multiboot_module_entry_t* multiboot_modules;
READONLY_AFTER_INIT size_t multiboot_modules_count;
READONLY_AFTER_INIT PhysicalAddress multiboot_module_ramdisk_physical_start;
READONLY_AFTER_INIT PhysicalAddress multiboot_module_ramdisk_physical_end;
READONLY_AFTER_INIT PhysicalAddress multiboot_module_ramdisk_physical_string_addr;
READONLY_AFTER_INIT PhysicalAddress multiboot_framebuffer_addr;
READONLY_AFTER_INIT u32 multiboot_framebuffer_pitch;
READONLY_AFTER_INIT u32 multiboot_framebuffer_width;
@ -170,8 +169,10 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init([[maybe_unused]] BootInfo con
multiboot_flags = boot_info.multiboot_flags;
multiboot_memory_map = (multiboot_memory_map_t*)boot_info.multiboot_memory_map;
multiboot_memory_map_count = boot_info.multiboot_memory_map_count;
multiboot_modules = (multiboot_module_entry_t*)boot_info.multiboot_modules;
multiboot_modules_count = boot_info.multiboot_modules_count;
multiboot_module_ramdisk_physical_start = PhysicalAddress { boot_info.multiboot_module_ramdisk_physical_start };
multiboot_module_ramdisk_physical_end = PhysicalAddress { boot_info.multiboot_module_ramdisk_physical_end };
multiboot_module_ramdisk_physical_string_addr = PhysicalAddress { boot_info.multiboot_module_ramdisk_physical_string_addr };
multiboot_framebuffer_addr = PhysicalAddress { boot_info.multiboot_framebuffer_addr };
multiboot_framebuffer_pitch = boot_info.multiboot_framebuffer_pitch;
multiboot_framebuffer_width = boot_info.multiboot_framebuffer_width;
@ -200,8 +201,6 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init([[maybe_unused]] BootInfo con
// We need to copy the command line before kmalloc is initialized,
// as it may overwrite parts of multiboot!
CommandLine::early_initialize(kernel_cmdline);
memcpy(multiboot_copy_boot_modules_array, multiboot_modules, multiboot_modules_count * sizeof(multiboot_module_entry_t));
multiboot_copy_boot_modules_count = multiboot_modules_count;
new (&bsp_processor()) Processor();
bsp_processor().early_initialize(0);

5
Kernel/Arch/x86_64/linker.ld
View file

@ -69,6 +69,8 @@ SECTIONS
start_of_kernel_data = .;
*(.data*)
end_of_kernel_data = .;
. = ALIGN(4K);
*(.heap)
} :data
.ro_after_init ALIGN(4K) : AT(ADDR(.ro_after_init))
@ -85,9 +87,6 @@ SECTIONS
*(COMMON)
*(.bss*)
end_of_kernel_bss = .;
. = ALIGN(4K);
*(.heap)
} :bss
.dynamic ALIGN(4K) : AT (ADDR(.dynamic))