Difference between revisions of "Kernel Loader"
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Revision as of 03:25, 31 August 2019
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
| 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 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 |