mirror of
https://github.com/tailix/kernel.git
synced 2024-10-30 12:03:52 -04:00
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
#include "panic.h"
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#include "pfa.h"
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#include "protected.h"
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#include "paging.h"
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#include "info.h"
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#include "stdlib.h"
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#include "module.h"
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#include "tasks.h"
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#include "elf.h"
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#include "logger.h"
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static struct KernelMQ_Info kinfo;
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void init(const struct KernelMQ_Info *const kinfo_ptr)
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{
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kmemset(&kinfo, 0, sizeof(struct KernelMQ_Info));
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assert(kernelmq_info_validate_and_copy(&kinfo, kinfo_ptr), "Invalid kernel information.");
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pfa_initialize(&kinfo);
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protected_initialize(&kinfo);
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// Set up a new post-relocate bootstrap pagetable so that
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// we can map in VM, and we no longer rely on pre-relocated
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// data.
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paging_clear();
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paging_identity(); // Still need 1:1 for lapic and video mem and such.
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paging_mapkernel(&kinfo);
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paging_load();
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if (kinfo.modules_count > 0) {
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const struct KernelMQ_ELF_Header *const elf_header =
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(void*)kinfo.modules[0].base;
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const unsigned char is_elf_header_valid =
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elf_header->magic_0x7F == 0x7F &&
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elf_header->magic_E == 'E' &&
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elf_header->magic_L == 'L' &&
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elf_header->magic_F == 'F' &&
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elf_header->bitness == 1 &&
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elf_header->endianness == 1 &&
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elf_header->header_version == 1 &&
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elf_header->os_abi == 0 &&
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elf_header->obj_type == 2 &&
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elf_header->isa == 3 &&
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elf_header->elf_version == 1 &&
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elf_header->arch_flags == 0 &&
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elf_header->header_size == 52;
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if (is_elf_header_valid) {
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tasks_switch_to_user(elf_header->entrypoint);
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}
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else {
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logger_warn_from("init", "Invalid ELF header");
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}
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}
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}
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