rts/ExecPage.c


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/*
 * Utilities for managing dynamically-allocated executable pages.
 *
 * These are primarily used to back the adjustor code produced by the native
 * adjustor implementations.
 */

#include "Rts.h"
#include "sm/OSMem.h"
#include "linker/MMap.h"

ExecPage *allocateExecPage() {
    ExecPage *page = (ExecPage *) mmapAnonForLinker(getPageSize());
    return page;
}

void freezeExecPage(ExecPage *page) {
    mprotectForLinker(page, getPageSize(), MEM_READ_EXECUTE);
    flushExec(getPageSize(), page);
}

void freeExecPage(ExecPage *page) {
    munmapForLinker(page, getPageSize(), "freeExecPage");
}