get_proc_info () syscall, CE procinfo command

kernel/syscall/syscall.c

@@ -14,6 +14,7 @@
 #include <proc/proc.h>
 #include <proc/procgroup.h>
 #include <proc/resource.h>
+#include <proc_info.h>
 #include <status.h>
 #include <sync/spin_lock.h>
 #include <sys/debug.h>
@@ -1055,6 +1056,26 @@ DEFINE_SYSCALL (sys_stream_read) {
   return SYSRESULT (proc_stream_read (&stream_resource->u.stream, buffer, buffer_size));
 }
 
+/* int get_proc_int (struct proc_info* infos, size_t count) */
+DEFINE_SYSCALL (sys_get_proc_info) {
+  uint64_t fp;
+
+  uintptr_t uvaddr_infos = a1;
+  size_t infos_count = (size_t)a2;
+
+  spin_lock (&proc->lock, &fp);
+  struct procgroup* procgroup = proc->procgroup;
+  spin_unlock (&proc->lock, fp);
+
+  struct proc_info* infos =
+      sys_get_user_buffer (procgroup, uvaddr_infos, infos_count * sizeof (struct proc_info));
+
+  if (infos == NULL)
+    return SYSRESULT (-ST_BAD_ADDRESS_SPACE);
+
+  return SYSRESULT (proc_populate_proc_infos (infos, infos_count));
+}
+
 static syscall_handler_func_t handler_table[] = {
     [SYS_QUIT] = &sys_quit,
     [SYS_TEST] = &sys_test,
@@ -1092,6 +1113,7 @@ static syscall_handler_func_t handler_table[] = {
     [SYS_GET_SELF_PID] = &sys_get_self_pid,
     [SYS_STREAM_WRITE] = &sys_stream_write,
     [SYS_STREAM_READ] = &sys_stream_read,
+    [SYS_GET_PROC_INFO] = &sys_get_proc_info,
 };
 
 syscall_handler_func_t syscall_find_handler (int syscall_num) {