refactor syscall ABI and FAT32 driver to use request structs and string views natively, enforce handle access rights on object lookup, add scheduler statistics tracking, fix KiSchedule to prevent 50% idle throttling on CPU-bound threads, better document x64 initial user stack alignment, fix process teardown to properly signal exit events and manage thread counts, optimize doom file I/O with a custom handle struct to internally track position and size, add SubsystemData to TEB for generic thread-local state, apply PAGE_NX to non-executable PE sections in the loader, update native apps, tests, and shells to match new APIs, update kernel32 directory retrieval.

code/posix/posix_proc.c

@@ -15,8 +15,8 @@ static SYS_PEB* PosixPeb(void) {
 
 __declspec(dllexport) const char* posix_get_command_line(void) {
     SYS_PEB* peb = PosixPeb();
-    if (!peb || peb->Magic != SYS_PEB_MAGIC || !peb->CommandLine) return "";
-    return peb->CommandLine;
+    if (!peb || peb->Magic != SYS_PEB_MAGIC || !peb->CommandLine.Data) return "";
+    return peb->CommandLine.Data;
 }
 
 // pid -> proc handle table (user-mode side, for waitpid)
@@ -104,7 +104,8 @@ __declspec(dllexport) int posix_spawn(pid_t* pidOut,
     }
 
     uint32_t procHandle;
-    uint32_t s = SysCreateProcess(native, &procHandle, cmdline);
+    SYS_CREATE_PROCESS_REQUEST req = { SysSvFromCstr(native), SysSvFromCstr(cmdline), &procHandle };
+    uint32_t s = SysCreateProcess(&req);
     if (s != 0) { errno = ENOENT; return -1; }
 
     uint32_t kpid = 0;