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Kernel: Add KERNEL_MAPPING_BASE to Sections.h and use it in Prekernel

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Timon Kruiper 2023-01-10 10:34:25 +01:00 committed by Linus Groh
parent 95992a255e
commit 33581d5c44
Notes: sideshowbarker 2024-07-17 22:09:47 +09:00 
Author: https://github.com/FireFox317
Commit: https://github.com/SerenityOS/serenity/commit/33581d5c44
Pull-request: https://github.com/SerenityOS/serenity/pull/16884
Reviewed-by: https://github.com/48cf
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/mrkct
Reviewed-by: https://github.com/nico ✅
3 changed files with 7 additions and 1 deletions
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4
Kernel/Prekernel/Prekernel.h
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@ -15,6 +15,10 @@
#define MAX_KERNEL_SIZE 0x4000000
#define KERNEL_PD_SIZE 0x31000000
// FIXME: This should be using the define from Sections.h, but that currently is not possible
// and causes linker errors, because Sections.h includes BootInfo.h.
#define KERNEL_MAPPING_BASE 0x2000000000
#ifdef __cplusplus
namespace Kernel {

2
Kernel/Prekernel/init.cpp
View file

@ -90,7 +90,7 @@ extern "C" [[noreturn]] void init()
__builtin_memcpy(kernel_program_headers, kernel_image + kernel_elf_header.e_phoff, sizeof(ElfW(Phdr)) * kernel_elf_header.e_phnum);
FlatPtr kernel_physical_base = 0x200000;
FlatPtr default_kernel_load_base = 0x2000200000;
FlatPtr default_kernel_load_base = KERNEL_MAPPING_BASE + 0x200000;
FlatPtr kernel_load_base = default_kernel_load_base;

2
Kernel/Sections.h
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@ -15,6 +15,8 @@
#define READONLY_AFTER_INIT __attribute__((section(".ro_after_init")))
#define UNMAP_AFTER_INIT NEVER_INLINE __attribute__((section(".unmap_after_init")))
#define KERNEL_MAPPING_BASE 0x2000000000
#define KERNEL_PD_END (kernel_mapping_base + KERNEL_PD_SIZE)
#define KERNEL_PT1024_BASE (kernel_mapping_base + 0x3FE00000)