Karina
31 lines
982 B
C
31 lines
982 B
C
// SPDX-License-Identifier: GPL-3.0-or-later
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// Copyright (c) 2026 0xKarinyash
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#include <OS/Services/OSServiceMemory.h>
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#include <OS/OSScheduler.h>
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#include <VM/PMM.h>
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#include <VM/VMM.h>
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#include <lib/String.h>
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UInt64 OSServiceMemoryAllocate(UInt64 size) {
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if (size == 0) return 0;
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OSProcess* currentProcess = gOSSchedulerCurrentTask->process;
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UInt64 addressToReturn = currentProcess->heapCurrentPointer;
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UInt64 pages_needed = (size + (kVMPageSize-1)) / kVMPageSize;
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for (UInt64 i = 0; i < pages_needed; i++) {
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void* phycialAddress = VMPhysicalMemoryAllocatePage();
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if (!phycialAddress) return 0;
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VMVirtualMemoryMapPage((UInt64*)currentProcess->physicalPML4, (UInt64)phycialAddress, currentProcess->heapCurrentPointer, PTE_PRESENT | PTE_RW | PTE_USER);
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MemorySet((void*)PHYS_TO_HHDM((UInt64)phycialAddress), 0, kVMPageSize);
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currentProcess->heapCurrentPointer += kVMPageSize;
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}
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return addressToReturn;
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}
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