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start documenting kernelldr
The Kernel Loader ("KernelLdr"/"Kernelldr") was added in [[8.0.0]]. It is responsible for applying relocations to the Kernel, and mapping the Kernel's .text/.rodata/.data/.bss at a random slide.
= Kernel Loader =
KernelLdr is called immediately by the Kernel's crt0 (after it deprivileges from EL2 to EL1, if required), with the following signature:
void KernelLoader_Main(uintptr_t kernel_base_address, KernelMap *kernel_map, uintptr_t ini1_base_address);
== KernelLoader_Main ==
* TODO: Fill in what KernelLdr does
== Structures ==
=== KernelMap ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 4
| .text offset
|-
| 0x4
| 4
| .text end offset
|-
| 0x8
| 4
| .rodata end offset
|-
| 0xC
| 4
| .rodata end offset
|-
| 0x10
| 4
| .rwdata offset
|-
| 0x14
| 4
| .rwdata end offset
|-
| 0x18
| 4
| .bss end offset
|-
| 0x1C
| 4
| .bss end offset
|-
| 0x20
| 4
| INI1 load offset
|-
| 0x24
| 4
| .dynamic end offset
|-
| 0x28
| 4
| .init_array end offset
|-
| 0x2C
| 4
| .init_array end offset
|-
|}
= Kernel Loader =
KernelLdr is called immediately by the Kernel's crt0 (after it deprivileges from EL2 to EL1, if required), with the following signature:
void KernelLoader_Main(uintptr_t kernel_base_address, KernelMap *kernel_map, uintptr_t ini1_base_address);
== KernelLoader_Main ==
* TODO: Fill in what KernelLdr does
== Structures ==
=== KernelMap ===
{| class="wikitable" border="1"
|-
! Offset
! Size
! Description
|-
| 0x0
| 4
| .text offset
|-
| 0x4
| 4
| .text end offset
|-
| 0x8
| 4
| .rodata end offset
|-
| 0xC
| 4
| .rodata end offset
|-
| 0x10
| 4
| .rwdata offset
|-
| 0x14
| 4
| .rwdata end offset
|-
| 0x18
| 4
| .bss end offset
|-
| 0x1C
| 4
| .bss end offset
|-
| 0x20
| 4
| INI1 load offset
|-
| 0x24
| 4
| .dynamic end offset
|-
| 0x28
| 4
| .init_array end offset
|-
| 0x2C
| 4
| .init_array end offset
|-
|}