SharedMemory * MemoryServer::insertShared(ProcessID procID,
char *key, Size size,
MemoryRange *range, bool *created)
{
SharedMemory *obj = findShared(key);
bool needCreate = obj == ZERO;
if (needCreate)
obj = new SharedMemory;
range->virtualAddress = findFreeRange(procID, size);
range->bytes = size;
range->access = Memory::Present | Memory::User | Memory::Readable | Memory::Writable | Memory::Pinned;
/* Only create a new mapping, if non-existent. */
if (needCreate)
{
range->physicalAddress = ZERO;
VMCtl(procID, Map, range);
/* Create new shared memory object. */
obj->size = size;
obj->key = key;
obj->address = range->physicalAddress;
/* Insert to the list. */
shared.append(obj);
/* We created a new mapping, flag that. */
if (created) *created = true;
}
else
{
range->physicalAddress = obj->address;
VMCtl(procID, Map, range);
/* We didn't create a new mapping, flag that. */
if (created) *created = false;
}
/* Done. */
return obj;
}
SharedMemory * MemoryServer::insertShared(ProcessID procID,
char *key, Size size,
MemoryRange *range, bool *created)
{
SharedMemory *obj;
range->virtualAddress = findFreeRange(procID, size);
range->bytes = size;
range->protection = PAGE_PRESENT | PAGE_USER | PAGE_RW | PAGE_PINNED;
/* Only create a new mapping, if non-existent. */
if (!(obj = findShared(key)))
{
range->physicalAddress = ZERO;
VMCtl(procID, Map, range);
/* Create new shared memory object. */
obj = new SharedMemory;
obj->size = size;
obj->key = new String(key);
obj->address = range->physicalAddress;
/* Insert to the list. */
shared.insertTail(obj);
/* We created a new mapping, flag that. */
if (created) *created = true;
}
else
{
range->physicalAddress = obj->address;
VMCtl(procID, Map, range);
/* We didn't create a new mapping, flag that. */
if (created) *created = false;
}
/* Done. */
return obj;
}
MemoryServer::MemoryServer()
: IPCServer<MemoryServer, MemoryMessage>(this)
{
SystemInformation info;
MemoryRange range;
BootImage *image;
BootProgram *program;
/* Register message handlers. */
addIPCHandler(CreatePrivate, &MemoryServer::createPrivate);
addIPCHandler(ReservePrivate, &MemoryServer::reservePrivate);
addIPCHandler(ReleasePrivate, &MemoryServer::releasePrivate);
addIPCHandler(CreateShared, &MemoryServer::createShared);
addIPCHandler(SystemMemory, &MemoryServer::systemMemory);
/* Allocate a user process table. */
insertShared(SELF, USER_PROCESS_KEY,
sizeof(UserProcess) * MAX_PROCS, &range);
/* Clear it. */
procs = (UserProcess *) range.virtualAddress;
memset(procs, 0, sizeof(UserProcess) * MAX_PROCS);
/* Allocate FileSystemMounts table. */
insertShared(SELF, FILE_SYSTEM_MOUNT_KEY,
sizeof(FileSystemMount) * MAX_MOUNTS, &range);
/* Also Clear it. */
mounts = (FileSystemMount *) range.virtualAddress;
memset(mounts, 0, sizeof(FileSystemMount) * MAX_MOUNTS);
/* We only guarantee that / and /dev are mounted. */
strlcpy(mounts[0].path, "/dev", PATHLEN);
strlcpy(mounts[1].path, "/", PATHLEN);
mounts[0].procID = DEVSRV_PID;
mounts[0].options = ZERO;
mounts[1].procID = ROOTSRV_PID;
mounts[1].options = ZERO;
/* Attempt to load the boot image. */
for (Size i = 0; i < info.moduleCount; i++)
{
if (strcmp(info.modules[i].string, "/boot/boot.img.gz") == 0)
{
range.virtualAddress = findFreeRange(SELF, PAGESIZE * 2);
range.physicalAddress = info.modules[i].modStart;
range.access = Memory::Present | Memory::User | Memory::Readable;
#warning Dangerous value for bytes here?
range.bytes = PAGESIZE * 2;
VMCtl(SELF, Map, &range);
image = (BootImage *) range.virtualAddress;
break;
}
}
/* Loop all embedded programs. */
for (Size j = 0; j < image->programsTableCount; j++)
{
/* Read out the next program. */
program = (BootProgram *)(((Address)image) + image->programsTableOffset);
program += j;
/* Write commandline. */
snprintf(procs[j].command, COMMANDLEN,
"[%s]", program->path);
/* Set current directory. */
snprintf(procs[j].currentDirectory, PATHLEN, "/");
/* Set user and group identities. */
procs[j].userID = 0;
procs[j].groupID = 0;
}
}
