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- /*
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * @(#) $Header: gencode.h,v 1.14 92/02/14 15:18:55 mccanne Exp $ (LBL)
- */
-
- /*
- * filter.h must be included before this file.
- */
-
- /* Address qualifers. */
-
- #define Q_HOST 1
- #define Q_NET 2
- #define Q_PORT 3
- #define Q_GATEWAY 4
- #define Q_PROTO 5
-
- /* Protocol qualifiers. */
-
- #define Q_LINK 1
- #define Q_IP 2
- #define Q_ARP 3
- #define Q_RARP 4
- #define Q_TCP 5
- #define Q_UDP 6
- #define Q_ICMP 7
-
- /* Directional qualifers. */
-
- #define Q_SRC 1
- #define Q_DST 2
- #define Q_OR 3
- #define Q_AND 4
-
- #define Q_DEFAULT 0
- #define Q_UNDEF 255
-
- struct stmt {
- int code;
- long k;
- };
-
- struct slist {
- struct stmt s;
- struct slist *next;
- };
-
- /*
- * A bit vector to represent definition sets. We assume TOT_REGISTERS
- * is smaller than 8*sizeof(atomset).
- */
- typedef u_long atomset;
- #define ATOMMASK(n) (1 << (n))
- #define ATOMELEM(d, n) (d & ATOMMASK(n))
-
- /*
- * An unbounded set.
- */
- typedef u_long *uset;
-
- /*
- * Total number of atomic entities, including accumulator (A) and index (X).
- * We treat all these guys similarly during flow analysis.
- */
- #define N_ATOMS (BPF_MEMWORDS+2)
-
- struct edge {
- int id;
- int code;
- uset edom;
- struct block *succ;
- struct block *pred;
- struct edge *next; /* link list of incoming edges for a node */
- };
-
- struct block {
- int id;
- struct slist *stmts; /* side effect stmts */
- struct stmt s; /* branch stmt */
- int mark;
- int level;
- int offset;
- int sense;
- struct edge et;
- struct edge ef;
- struct block *head;
- struct block *link; /* link field used by optimizer */
- uset dom;
- uset closure;
- struct edge *in_edges;
- atomset def, kill;
- atomset in_use;
- atomset out_use;
- long oval;
- long val[N_ATOMS];
- };
-
- struct arth {
- struct block *b; /* protocol checks */
- struct slist *s; /* stmt list */
- int regno; /* virtual register number of result */
- };
-
- extern struct arth *gen_loadi();
- extern struct arth *gen_load();
- extern struct arth *gen_loadlen();
- extern struct arth *gen_neg();
- extern struct arth *gen_arth();
-
- extern void gen_and();
- extern void gen_or();
- extern void gen_not();
-
- extern struct block *gen_scode();
- extern struct block *gen_ecode();
- extern struct block *gen_ncode();
- extern struct block *gen_proto_abbrev();
- extern struct block *gen_relation();
- extern struct block *gen_less();
- extern struct block *gen_greater();
- extern struct block *gen_byteop();
- extern struct block *gen_broadcast();
- extern struct block *gen_multicast();
-
- extern void optimize();
-
- extern void finish_parse();
-
- struct qual {
- unsigned char addr;
- unsigned char proto;
- unsigned char dir;
- unsigned char pad;
- };
-
- /* XXX */
- #define JT(b) ((b)->et.succ)
- #define JF(b) ((b)->ef.succ)
-