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Kernel/aarch64: Embed disk image into kernel binary

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This allows us to actually boot to userspace in the next commit! :^)
This commit is contained in:
Timon Kruiper 2023-01-30 14:07:37 +01:00 committed by Linus Groh
parent da89cd948f
commit 3b65fd64fc
Notes: sideshowbarker 2024-07-18 03:20:18 +09:00 
Author: https://github.com/FireFox317
Commit: https://github.com/SerenityOS/serenity/commit/3b65fd64fc
Pull-request: https://github.com/SerenityOS/serenity/pull/17249
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/nico ✅
Reviewed-by: https://github.com/supercomputer7
4 changed files with 18 additions and 3 deletions
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3
Kernel/Arch/aarch64/Dummy.cpp
View file

@ -38,9 +38,6 @@ bool g_pci_access_is_disabled_from_commandline { false };
// x86 init
multiboot_module_entry_t multiboot_copy_boot_modules_array[16];
size_t multiboot_copy_boot_modules_count;
extern "C" {
READONLY_AFTER_INIT PhysicalAddress start_of_prekernel_image;
READONLY_AFTER_INIT PhysicalAddress end_of_prekernel_image;

12
Kernel/Arch/aarch64/init.cpp
View file

@ -43,6 +43,12 @@ uintptr_t __stack_chk_guard;
READONLY_AFTER_INIT bool g_in_early_boot;
extern "C" const u32 disk_image_start;
extern "C" const u32 disk_image_size;
multiboot_module_entry_t multiboot_copy_boot_modules_array[16];
size_t multiboot_copy_boot_modules_count;
namespace Kernel {
static void draw_logo(u8* framebuffer_data);
@ -111,6 +117,12 @@ extern "C" [[noreturn]] void init()
multiboot_memory_map = mmap;
multiboot_memory_map_count = 1;
multiboot_flags = 0x4;
multiboot_copy_boot_modules_count = 1;
auto disk_image_start_physical_addr = ((FlatPtr)&disk_image_start - kernel_load_base);
multiboot_copy_boot_modules_array[0].start = disk_image_start_physical_addr;
multiboot_copy_boot_modules_array[0].end = disk_image_start_physical_addr + disk_image_size;
dbgln("Welcome to Serenity OS!");
dbgln("Imagine this being your ideal operating system.");
dbgln("Observed deviations from that ideal are shortcomings of your imagination.");

5
Kernel/Arch/aarch64/linker.ld
View file

@ -80,6 +80,11 @@ SECTIONS
page_tables_phys_end = .;
end_of_kernel_image = .;
disk_image ALIGN(4K) : AT (ADDR(disk_image) - KERNEL_MAPPING_BASE)
{
*(disk_image)
}
}
size_of_bss_divided_by_8 = (end_of_bss - start_of_bss + 7) / 8;

1
Kernel/CMakeLists.txt
View file

@ -726,6 +726,7 @@ install(FILES "${CMAKE_CURRENT_BINARY_DIR}/kernel.map" DESTINATION res)
if ("${SERENITY_ARCH}" STREQUAL "aarch64")
embed_resource(Kernel serenity_boot_logo "Arch/aarch64/SerenityLogoRGB.ppm")
embed_resource(Kernel disk_image "../Build/aarch64/_disk_image")
add_custom_command(
TARGET Kernel POST_BUILD
COMMAND ${CMAKE_OBJCOPY} -O binary Kernel kernel8.img