bool PCProcess::setMemoryAccessRights(Address start, size_t size,
PCMemPerm rights) {
// if (PAGE_EXECUTE_READWRITE == rights || PAGE_READWRITE == rights) {
if (rights.isRWX() || rights.isRW() ) {
mapped_object *obj = findObject(start);
int page_size = getMemoryPageSize();
for (Address cur = start; cur < (start + size); cur += page_size) {
obj->removeProtectedPage(start -(start % page_size));
}
}
stopProcess();
changeMemoryProtections(start, size, rights, true);
return true;
}
bool PCProcess::setMemoryAccessRights(Address start, size_t size,
PCMemPerm rights) {
mal_printf("setMemoryAccessRights to %s [%lx %lx]\n",
rights.getPermName().c_str(), start, start+size);
assert(!"Not implemented yet");
return false;
}
void PCProcess::changeMemoryProtections(Address addr, size_t size,
PCMemPerm rights, bool setShadow) {
PCMemPerm oldRights;
unsigned pageSize = getMemoryPageSize();
Address pageBase = addr - (addr % pageSize);
size += (addr % pageSize);
// Temporary: set on a page-by-page basis to work around problems
// with memory deallocation
for (Address idx = pageBase, idx_e = pageBase + size;
idx < idx_e; idx += pageSize) {
mal_printf("setting rights to %s for [%lx %lx)\n",
rights.getPermName().c_str(), idx , idx + pageSize);
if (!pcProc_->setMemoryAccessRights(idx, pageSize,
rights, oldRights)) {
mal_printf("ERROR: failed to set access rights "
"for page %lx, %s[%d]\n", addr, FILE__, __LINE__);
} else if (isMemoryEmulated() && setShadow) {
Address shadowAddr = 0;
PCMemPerm shadowRights;
bool valid = false;
boost::tie(valid, shadowAddr) = getMemEm()->translate(idx);
if (!valid) {
mal_printf("WARNING: set access rights on page %lx that has "
"no shadow %s[%d]\n",addr,FILE__,__LINE__);
} else {
if(!pcProc_->setMemoryAccessRights(shadowAddr, pageSize,
rights, shadowRights)) {
mal_printf("ERROR: failed to set access rights "
"for page %lx, %s[%d]\n",
shadowAddr, FILE__, __LINE__);
}
if (shadowRights != oldRights) {
mal_printf("WARNING: shadow page[%lx] rights %s did not "
"match orig-page [%lx] rights %s\n",
shadowAddr, shadowRights.getPermName().c_str(),
addr, oldRights.getPermName().c_str());
}
}
}
}
}
