System calls are now part of dedicated symbol library

- This symbol library is still special in that symbols are created on
  demand and never actually added.  It just serves as a link to
  protolibrary with system call prototypes, and has a name (SYS).

- Prototypes for system calls were moved to a dedicated prototype
  library called syscalls.conf.

- Because it's undesirable to look up syscall prototypes in anything
  but the dedicated syscall protolib, prototype.c/.h now understand
  that some lookups shouldn't be done recursively (and so we never
  pick the definition from -F file that just happens to have the same
  name as a system call).  The good thing is that now libraries can
  actually use symbols named SYS_something without clashing with
  system call prototypes.

- One test case needed to be updated, because we now display system
  calls as something@SYS instead of SYS_something.

1 files changed, 10 insertions, 8 deletions

diff --git a/prototype.h b/prototype.h
index e6a4c21..26c3098 100644
--- a/prototype.h
+++ b/prototype.h
@@ -21,6 +21,8 @@
 #ifndef _PROTOTYPE_H_
 #define _PROTOTYPE_H_
 
+#include <stdbool.h>
+
 #include "forward.h"
 #include "dict.h"
 #include "vect.h"
@@ -122,21 +124,21 @@ int protolib_add_named_type(struct protolib *plib,
 			    const char *name, int own_name,
 			    struct named_type *named);
 
-/* Lookup prototype named NAME in PLIB.  If none is found, look
- * recursively in each of the imports.  Returns the corresponding
- * prototype, or NULL if none was found.  */
+/* Lookup prototype named NAME in PLIB.  If none is found and IMPORTS
+ * is true, look recursively in each of the imports.  Returns the
+ * corresponding prototype, or NULL if none was found.  */
 struct prototype *protolib_lookup_prototype(struct protolib *plib,
-					    const char *name);
+					    const char *name, bool imports);
 
 /* Add a named type NAMED to PLIB.  Returns 0 on success or a negative
  * value on failure.  */
 int protolib_add_type(struct protolib *plib, struct named_type *named);
 
-/* Lookup type named NAME in PLIB.  If none is found, look recursively
- * in each of the imports.  Returns the corresponding type, or NULL if
- * none was found.  */
+/* Lookup type named NAME in PLIB.  If none is found and IMPORTS is
+ * true, look recursively in each of the imports.  Returns the
+ * corresponding type, or NULL if none was found.  */
 struct named_type *protolib_lookup_type(struct protolib *plib,
-					const char *name);
+					const char *name, bool imports);
 
 /* A cache of prototype libraries.  Can load prototype libraries on
  * demand.