as.h - scc - simple c99 compiler
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as.h (2952B)
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1 /*
2 * First 3 bits of flags in segments and symbols are for the
3 * type of segment
4 */
5 enum symflags {
6 FREG = 1 << 0,
7 FSECT = 1 << 1,
8 FSYM = 1 << 2,
9 FCOMMON = 1 << 3,
10 FEXTERN = 1 << 4,
11 FDEF = 1 << 5,
12 FGLOBAL = 1 << 6,
13 FABS = 1 << 7,
14 };
15
16 /*
17 * some systems polute the namespace defining BIG_ENDIAN and
18 * LITTLE_ENDIAN
19 */
20 #undef BIG_ENDIAN
21 #undef LITTLE_ENDIAN
22
23 enum endianess {
24 BIG_ENDIAN = -1,
25 LITTLE_ENDIAN = 1
26 };
27
28 enum common_args {
29 AIMM = 1,
30 ASTR,
31 AREG,
32 ANUMBER,
33 AIMM2,
34 AIMM3,
35 AIMM5,
36 AIMM8,
37 AIMM16,
38 AIMM32,
39 AIMM64,
40 AINDIR,
41 AINDEX,
42 ADIRECT,
43 AREG_OFF,
44 ASYM,
45 AOPT,
46 AREP,
47 AMAX,
48 };
49
50 enum tokens {
51 EOS = -1,
52 IDEN = 1,
53 NUMBER,
54 REG,
55 STRING,
56 MINUS,
57 SHL,
58 SHR,
59 GE,
60 LE,
61 };
62
63 #define MAXSYM 63
64
65 typedef struct reloc Reloc;
66 typedef struct ins Ins;
67 typedef struct op Op;
68 typedef struct node Node;
69 typedef void Format(Op *, Node **);
70
71 struct line {
72 char *label;
73 char *op;
74 char *args;
75 };
76
77 struct ins {
78 int begin, end;
79 char *str;
80 };
81
82 struct reloc {
83 size_t offset;
84 Symbol *sym;
85 unsigned char flags;
86 unsigned char size;
87 unsigned char nbits;
88 unsigned char shift;
89 };
90
91 struct op {
92 unsigned char flags;
93 unsigned char size;
94 void (*format)(Op *, Node **);
95 unsigned char *bytes;
96 unsigned char *args;
97 };
98
99 struct node {
100 unsigned char op;
101 unsigned char addr;
102 struct symbol *sym;
103 struct node *left;
104 struct node *right;
105 };
106
107 union yylval {
108 TUINT val;
109 Symbol *sym;
110 };
111
112 /* symbol.c */
113 extern void cleansecs(void);
114 extern void ibinfmt(void);
115 extern void emit(char *, int);
116 extern Section *defsec(char *, char *);
117 extern Symbol *tmpsym(TUINT);
118 extern void killtmp(void);
119 extern int toobig(Node *, int);
120 extern void dumpstab(char *);
121 extern Symbol *lookup(char *);
122 extern Symbol *deflabel(char *);
123 extern unsigned long long getpc(void);
124
125 /* parser.c */
126 extern Node **getargs(char *);
127 extern void error(char *, ...);
128 /* Avoid errors in files where stdio is not included */
129 #ifdef stdin
130 extern int nextline(struct line *);
131 #endif
132 extern void unexpected(void);
133 extern void expect(int);
134 int next(void);
135 #define accept(t) (yytoken == (t) ? next() : 0)
136 extern void regctx(int mode);
137 extern Node *getreg(void);
138 extern Node *operand(char **);
139 extern void addinput(char *);
140 extern int delinput(void);
141 extern int ahead(void);
142
143 /* expr.c */
144 extern Node *expr(void);
145 extern void deltree(Node *);
146 extern Node *node(int, Node *, Node *);
147
148 /* proc.c */
149 extern void iarch(void);
150 extern int match(Op *, Node **);
151 extern Node *moperand(void);
152
153 /* ins.c */
154 extern char *tobytes(TUINT, int, int);
155
156 /* binfmt.c */
157 extern void writeout(char *);
158
159 /*
160 * Definition of global variables
161 */
162 extern unsigned long M, S, K;
163 extern short hashmap[];
164 extern Section *cursec;
165 extern Ins instab[];
166 extern Op optab[];
167 extern int pass;
168 extern TUINT maxaddr;
169 extern int endian;
170 extern Symbol *linesym;
171 extern char *infile, *outfile;
172 extern int endpass;
173 extern int yytoken;
174 extern size_t yylen;
175 extern union yylval yylval;
176 extern char yytext[];