888
edits
Changes
Jump to navigation
Jump to search
Line 7:
Line 7: − + − + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
→KernelLoader_Main
void KernelLoader_Main(uintptr_t kernel_base_address, KernelMap *kernel_map, uintptr_t ini1_base_address);
void KernelLoader_Main(uintptr_t kernel_base_address, KernelMap *kernel_map, uintptr_t ini1_base_address);
== KernelLoader_Main ==
== KernelLdr_Main ==
* TODO: Fill in what KernelLdr does
First, it clears BSS, and then sets SP = <BSS end>.
<pre>
for (uint64_t *i = __bss_start; i != __bss_end; i++) {
*i = 0;
}
SP = __bss_end;
</pre>
Next, it applies relocations to itself and calls its init array.
<pre>
KernelLdr_ApplyRelocations(&KernelLdr_Main, __dynamic_start);
KernelLdr_libc_init_array();
</pre>
Then, it calls the function which relocates the kernel, and jumps back to the kernel entrypoint.
<pre>
// KernelLdr_LoadKernel returns (relocated_kernel_base - original_kernel_base).
uintptr_t kernel_relocation_offset = KernelLdr_LoadKernel(kernel_base, kernel_map, ini_base);
// dtor called for static page allocator.
g_InitialPageAllocator.~KInitialPageAllocator();
// Jumps back to the kernel code that called KernelLdr_Main.
((void (*)(void))(kernel_relocation_offset + LR))();
</pre>
== KernelLdr_ApplyRelocations ==
TODO: Fill this out
== KernelLdr_lib_init_array() ==
This is just standard libc init array code. .init_array is empty in all available binaries.
== KernelLdr_LoadKernel ==
TODO: Fill this out
== KInitialPageAllocator::~KInitialPageAllocator ==
This just clears the allocator's next address.
<pre>
this->next_address = 0;
</pre>
== Structures ==
== Structures ==