27 lines
824 B
C
27 lines
824 B
C
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#include "heap_break.h"
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#include "memory.h"
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#include "paging_internal.h"
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#include "../runtime/stdio.h"
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static uintptr_t heapBreak = KERNEL_HEAP_VIRTUAL, pageBreak = KERNEL_HEAP_VIRTUAL;
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void *memory_AddBreak(intptr_t inc) {
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if (heapBreak + inc < KERNEL_HEAP_VIRTUAL)
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return (void *)-1;
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heapBreak += inc;
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if (heapBreak > pageBreak) {
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// we need more pages
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int pageCount = roundUpToPageCount(heapBreak - pageBreak);
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io_Printf("memory_AddBreak(): 0x%llx -> 0x%llx, add %d, allocating %d pages\n", heapBreak - inc, heapBreak, inc, pageCount);
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paging_map_PageAllocated(pageBreak, pageCount, MAP_PROT_READ | MAP_PROT_WRITE);
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pageBreak += SYSTEM_PAGE_SIZE * pageCount;
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} else
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io_Printf("memory_AddBreak(): 0x%llx -> 0x%llx, add %d\n", heapBreak - inc, heapBreak, inc);
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return (void *)(heapBreak - inc);
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}
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