| // Copyright 2021 The Fuchsia Authors |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #include <lib/arch/x86/standard-segments.h> |
| #include <lib/arch/zbi-boot.h> |
| |
| namespace arch { |
| |
| [[noreturn]] void ZbiBootRaw(uintptr_t entry, void* data) { |
| // Make a fresh little GDT on the stack here just so we know there's a 64-bit |
| // code segment to use. The stack this function is using is usually not |
| // going to be preserved, it's just arbitrary memory that the new kernel |
| // might overwrite. But it's obliged to set up its own GDT and its own page |
| // tables and so on in its own load image and bss space before touching any |
| // other "free" memory in the system, so this bit of stack is as good a place |
| // as any for the temporary GDT. |
| X86StandardSegments().Load(entry, reinterpret_cast<uintptr_t>(data)); |
| } |
| |
| } // namespace arch |
