master gem5 ThreadContext vs ThreadState vs ExecContext vs Process!

userland/posix/getpid.c

@@ -0,0 +1,13 @@
+/* https://cirosantilli.com/linux-kernel-module-cheat#getpid */
+
+#define _XOPEN_SOURCE 700
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main(void) {
+    printf("pid=%jd\n", (intmax_t)getpid());
+    return EXIT_SUCCESS;
+}