redo boot around an explicit system volume and fixed kernel/HAL images, redo volumes and filesystem paths around capabilities instead of drive numbers and kernel CWD state, add a capability/security model with derived and revocable handles and security contexts, add port IPC and rssrv to manage the userspace resource namespace and publish the system volume, move process, dll and path loading to userspace and add process builder syscalls, init now supervises rssrv and the session process, redo the syscall ABI around request structs and four arguments, add a volume manager and proper partition arrival/removal handling so FAT and NTFS mount dynamically, clean up the HAL/DDK boundary so drivers don't depend on HAL internals, save fpu state properly now, the serial driver doesn't hang on a missing port, fix AHCI startup races, fix timeout accounting, fix shared mmap writeback, more smoke tests

code/user/apps/udp/udp.c

@@ -8,12 +8,12 @@
 
 // Prints the requested operation.
 static void print(const char* s) {
-    if (s) { SYS_WRITE_CONSOLE_REQUEST req = { SysSvFromCstr(s) }; SysWriteConsole(&req); }
+    if (s) { SYS_WRITE_CONSOLE_REQUEST req = { sizeof(SYS_WRITE_CONSOLE_REQUEST), SysSvFromCstr(s) }; SysWriteConsole(&req); }
 }
 
 // Prints char.
 static void print_char(char c) {
-    SYS_WRITE_CONSOLE_REQUEST req = { SysSvFromParts(&c, 1) };
+    SYS_WRITE_CONSOLE_REQUEST req = { sizeof(SYS_WRITE_CONSOLE_REQUEST), SysSvFromParts(&c, 1) };
     SysWriteConsole(&req);
 }
 
@@ -155,6 +155,7 @@ static uint32_t resolve_address(const char* text, SYS_SOCKET_ADDRESS* out) {
     size_t addressSize = sizeof(*out);
     memset(out, 0, sizeof(*out));
     memset(&req, 0, sizeof(req));
+    req.Size = sizeof(req);
     req.Name = SysSvFromCstr(text);
     req.Family = SYS_AF_INET6;
     req.AddressOut = out;
@@ -207,6 +208,7 @@ static int run_send(const char* cmd) {
     size_t sent = 0;
     SYS_SOCKET_SEND_TO_REQUEST req;
     memset(&req, 0, sizeof(req));
+    req.Size = sizeof(req);
     req.Buffer = msg;
     req.Length = strlen(msg);
     req.RemoteAddress = &remote;
@@ -270,6 +272,7 @@ static int run_listen(const char* cmd) {
     size_t got = 0;
     SYS_SOCKET_RECV_FROM_REQUEST req;
     memset(&req, 0, sizeof(req));
+    req.Size = sizeof(req);
     req.Buffer = buf;
     req.Length = sizeof(buf) - 1;
     req.RemoteAddressOut = &remote;