Implement proc_spawn_thread syscall, fix proc_resume and proc_suspend

init/init.c

@@ -5,24 +5,41 @@
 #include <string/string.h>
 
 char c = 'a';
+int mutex_rid;
+
+void mythread (void) {
+  for (;;) {
+    proc_mutex_lock (mutex_rid);
+    for (size_t i = 0; i < 3; i++)
+      proc_test ('b');
+    proc_mutex_unlock (mutex_rid);
+    proc_sched ();
+  }
+}
+
+void make_thread (void* fn) {
+  size_t stack_pages = 256;
+  size_t stack_size = PAGE_SIZE * stack_pages;
+
+  uintptr_t out_paddr;
+  int mem_rid = proc_create_resource_mem (100, stack_pages, RV_PRIVATE, &out_paddr);
+  proc_map (out_paddr, PROC_MAP_BASE, stack_pages, PM_PRESENT | PM_RW | PM_USER);
+  memset ((void*)PROC_MAP_BASE, 0, stack_size);
+
+  uintptr_t vstack_top = PROC_MAP_BASE + stack_size;
+  proc_spawn_thread (vstack_top, stack_size, fn);
+}
 
 void app_main (void) {
-  uintptr_t out_paddr;
-  int mem_rid = proc_create_resource_mem (100, 16, RV_PRIVATE, &out_paddr);
+  mutex_rid = proc_create_resource_mutex (200, RV_PRIVATE);
 
-  proc_map (out_paddr, PROC_MAP_BASE, 16, PM_PRESENT | PM_RW | PM_USER);
+  make_thread (&mythread);
 
-  memset ((void*)PROC_MAP_BASE, 0, PAGE_SIZE * 16);
-
-  proc_unmap (PROC_MAP_BASE, 16);
-
-  proc_drop_resource (mem_rid);
-
-  proc_test ('a');
-
-  int mutex_rid = proc_create_resource_mutex (101, RV_PRIVATE);
-
-  proc_mutex_lock (mutex_rid);
-  proc_test ('b');
-  proc_mutex_unlock (mutex_rid);
+  for (;;) {
+    proc_mutex_lock (mutex_rid);
+    for (size_t i = 0; i < 3; i++)
+      proc_test ('a');
+    proc_mutex_unlock (mutex_rid);
+    proc_sched ();
+  }
 }