X-Git-Url: https://git.tcpdump.org/libpcap/blobdiff_plain/fb20696441656c36961e92e3ddf074d770e81c55..a94d5a3f5426b1e91c9ba1851d35d4fee55e80df:/gencode.h diff --git a/gencode.h b/gencode.h index 2b089d21..9631dd02 100644 --- a/gencode.h +++ b/gencode.h @@ -19,6 +19,12 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ +#ifndef gencode_h +#define gencode_h + +#include "pcap/funcattrs.h" +#include "pcap/bpf.h" /* bpf_u_int32 and BPF_MEMWORDS */ + /* * ATM support: * @@ -53,10 +59,6 @@ * POSSIBILITY OF SUCH DAMAGE. */ -#ifndef HAVE___ATTRIBUTE__ -#define __attribute__(x) -#endif /* HAVE___ATTRIBUTE__ */ - /* Address qualifiers. */ #define Q_HOST 1 @@ -115,16 +117,14 @@ #define Q_ISIS_L2 32 /* PDU types */ #define Q_ISIS_IIH 33 -#define Q_ISIS_LAN_IIH 34 -#define Q_ISIS_PTP_IIH 35 -#define Q_ISIS_SNP 36 -#define Q_ISIS_CSNP 37 -#define Q_ISIS_PSNP 38 -#define Q_ISIS_LSP 39 +#define Q_ISIS_SNP 34 +#define Q_ISIS_CSNP 35 +#define Q_ISIS_PSNP 36 +#define Q_ISIS_LSP 37 -#define Q_RADIO 40 +#define Q_RADIO 38 -#define Q_CARP 41 +#define Q_CARP 39 /* Directional qualifiers. */ @@ -204,11 +204,14 @@ struct slist; +/* + * A single statement, corresponding to an instruction in a block. + */ struct stmt { - int code; - struct slist *jt; /*only for relative jump in block*/ - struct slist *jf; /*only for relative jump in block*/ - bpf_int32 k; + int code; /* opcode */ + struct slist *jt; /* only for relative jump in block */ + struct slist *jf; /* only for relative jump in block */ + bpf_u_int32 k; /* k field */ }; struct slist { @@ -235,17 +238,27 @@ typedef bpf_u_int32 *uset; */ #define N_ATOMS (BPF_MEMWORDS+2) +/* + * Control flow graph of a program. + * This corresponds to an edge in the CFG. + * It's a directed graph, so an edge has a predecessor and a successor. + */ struct edge { - int id; - int code; + u_int id; + int code; /* opcode for branch corresponding to this edge */ uset edom; - struct block *succ; - struct block *pred; + struct block *succ; /* successor vertex */ + struct block *pred; /* predecessor vertex */ struct edge *next; /* link list of incoming edges for a node */ }; +/* + * A block is a vertex in the CFG. + * It has a list of statements, with the final statement being a + * branch to successor blocks. + */ struct block { - int id; + u_int id; struct slist *stmts; /* side effect stmts */ struct stmt s; /* branch stmt */ int mark; @@ -254,20 +267,25 @@ struct block { int level; int offset; int sense; - struct edge et; - struct edge ef; + struct edge et; /* edge corresponding to the jt branch */ + struct edge ef; /* edge corresponding to the jf branch */ struct block *head; struct block *link; /* link field used by optimizer */ uset dom; uset closure; - struct edge *in_edges; + struct edge *in_edges; /* first edge in the set (linked list) of edges with this as a successor */ atomset def, kill; atomset in_use; atomset out_use; - int oval; - int val[N_ATOMS]; + int oval; /* value ID for value tested in branch stmt */ + bpf_u_int32 val[N_ATOMS]; }; +/* + * A value of 0 for val[i] means the value is unknown. + */ +#define VAL_UNKNOWN 0 + struct arth { struct block *b; /* protocol checks */ struct slist *s; /* stmt list */ @@ -285,8 +303,8 @@ struct _compiler_state; typedef struct _compiler_state compiler_state_t; -struct arth *gen_loadi(compiler_state_t *, int); -struct arth *gen_load(compiler_state_t *, int, struct arth *, int); +struct arth *gen_loadi(compiler_state_t *, bpf_u_int32); +struct arth *gen_load(compiler_state_t *, int, struct arth *, bpf_u_int32); struct arth *gen_loadlen(compiler_state_t *); struct arth *gen_neg(compiler_state_t *, struct arth *); struct arth *gen_arth(compiler_state_t *, int, struct arth *, struct arth *); @@ -296,13 +314,13 @@ void gen_or(struct block *, struct block *); void gen_not(struct block *); struct block *gen_scode(compiler_state_t *, const char *, struct qual); -struct block *gen_ecode(compiler_state_t *, const u_char *, struct qual); -struct block *gen_acode(compiler_state_t *, const u_char *, struct qual); +struct block *gen_ecode(compiler_state_t *, const char *, struct qual); +struct block *gen_acode(compiler_state_t *, const char *, struct qual); struct block *gen_mcode(compiler_state_t *, const char *, const char *, - unsigned int, struct qual); + bpf_u_int32, struct qual); #ifdef INET6 struct block *gen_mcode6(compiler_state_t *, const char *, const char *, - unsigned int, struct qual); + bpf_u_int32, struct qual); #endif struct block *gen_ncode(compiler_state_t *, const char *, bpf_u_int32, struct qual); @@ -311,9 +329,10 @@ struct block *gen_relation(compiler_state_t *, int, struct arth *, struct arth *, int); struct block *gen_less(compiler_state_t *, int); struct block *gen_greater(compiler_state_t *, int); -struct block *gen_byteop(compiler_state_t *, int, int, int); +struct block *gen_byteop(compiler_state_t *, int, int, bpf_u_int32); struct block *gen_broadcast(compiler_state_t *, int); struct block *gen_multicast(compiler_state_t *, int); +struct block *gen_ifindex(compiler_state_t *, int); struct block *gen_inbound(compiler_state_t *, int); struct block *gen_llc(compiler_state_t *); @@ -323,22 +342,22 @@ struct block *gen_llc_u(compiler_state_t *); struct block *gen_llc_s_subtype(compiler_state_t *, bpf_u_int32); struct block *gen_llc_u_subtype(compiler_state_t *, bpf_u_int32); -struct block *gen_vlan(compiler_state_t *, int); -struct block *gen_mpls(compiler_state_t *, int); +struct block *gen_vlan(compiler_state_t *, bpf_u_int32, int); +struct block *gen_mpls(compiler_state_t *, bpf_u_int32, int); struct block *gen_pppoed(compiler_state_t *); -struct block *gen_pppoes(compiler_state_t *, int); +struct block *gen_pppoes(compiler_state_t *, bpf_u_int32, int); -struct block *gen_geneve(compiler_state_t *, int); +struct block *gen_geneve(compiler_state_t *, bpf_u_int32, int); -struct block *gen_atmfield_code(compiler_state_t *, int, bpf_int32, - bpf_u_int32, int); -struct block *gen_atmtype_abbrev(compiler_state_t *, int type); -struct block *gen_atmmulti_abbrev(compiler_state_t *, int type); +struct block *gen_atmfield_code(compiler_state_t *, int, bpf_u_int32, + int, int); +struct block *gen_atmtype_abbrev(compiler_state_t *, int); +struct block *gen_atmmulti_abbrev(compiler_state_t *, int); -struct block *gen_mtp2type_abbrev(compiler_state_t *, int type); +struct block *gen_mtp2type_abbrev(compiler_state_t *, int); struct block *gen_mtp3field_code(compiler_state_t *, int, bpf_u_int32, - bpf_u_int32, int); + int, int); struct block *gen_pf_ifname(compiler_state_t *, const char *); struct block *gen_pf_rnr(compiler_state_t *, int); @@ -347,8 +366,8 @@ struct block *gen_pf_ruleset(compiler_state_t *, char *); struct block *gen_pf_reason(compiler_state_t *, int); struct block *gen_pf_action(compiler_state_t *, int); -struct block *gen_p80211_type(compiler_state_t *, int, int); -struct block *gen_p80211_fcdir(compiler_state_t *, int); +struct block *gen_p80211_type(compiler_state_t *, bpf_u_int32, bpf_u_int32); +struct block *gen_p80211_fcdir(compiler_state_t *, bpf_u_int32); /* * Representation of a program as a tree of blocks, plus current mark. @@ -365,23 +384,15 @@ struct icode { int cur_mark; }; -void bpf_optimize(compiler_state_t *, struct icode *ic); -void bpf_syntax_error(compiler_state_t *, const char *); -void bpf_error(compiler_state_t *, const char *, ...) - __attribute__((noreturn)) -#ifdef __ATTRIBUTE___FORMAT_OK - __attribute__((format (printf, 2, 3))) -#endif /* __ATTRIBUTE___FORMAT_OK */ - ; +int bpf_optimize(struct icode *, char *); +void bpf_set_error(compiler_state_t *, const char *, ...) + PCAP_PRINTFLIKE(2, 3); -void finish_parse(compiler_state_t *, struct block *); +int finish_parse(compiler_state_t *, struct block *); char *sdup(compiler_state_t *, const char *); -struct _opt_state; -typedef struct _opt_state opt_state_t; - -struct bpf_insn *icode_to_fcode(compiler_state_t *, struct icode *, - struct block *, u_int *); +struct bpf_insn *icode_to_fcode(struct icode *, struct block *, u_int *, + char *); void sappend(struct slist *, struct slist *); /* @@ -393,3 +404,5 @@ int pcap_parse(void *, compiler_state_t *); /* XXX */ #define JT(b) ((b)->et.succ) #define JF(b) ((b)->ef.succ) + +#endif /* gencode_h */