Mercurial > hg-old > index.cgi

comparison src/lwasm.h @ 0:57495da01900

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial checking of LWASM
author lost
date Fri, 03 Oct 2008 02:44:20 +0000
parents
children 34568fab6058
comparison
equal deleted inserted replaced
-1:000000000000 0:57495da01900
1 /*
2 * lwasm.h
3 *
4 * main defs used by the assembler
5 *
6 */
7
8
9 #ifndef __lwasm_h_seen__
10 #define __lwasm_h_seen__
11
12 #define MAX_OP_LEN 32
13 #define SYMCHAR_START "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
14 #define SYMCHAR "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_$."
15
16 #define MACROCHAR_START "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
17 #define MACROCHAR "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
18
19
20 #define OPER_INH 0
21 #define OPER_RTOR 1
22 #define OPER_RLIST 2
23 #define OPER_TFM 3
24 #define OPER_IMM8 4
25 #define OPER_IMM16 5
26 #define OPER_IMM32 6
27 #define OPER_DIR 7
28 #define OPER_EXT 8
29 #define OPER_INDEX 9 // indexed with no offset
30 #define OPER_DIREXT 10 // used as a placeholder when direct/extended unknown
31 #define OPER_BITBIT 11 // bit to bit direct page opers
32 #define OPER_REL8 12
33 #define OPER_REL16 13
34 #define OPER_INDEX5 14 // 5 bit offset indexed
35 #define OPER_INDEX8 15 // 8 bit offset indexed
36 #define OPER_INDEX16 16 // 16 bit offset indexed
37 #define OPER_INDEXV 17 // unknown size offset indexed
38 #define OPER_EXTIND 18 // extended indirect
39 #define OPER_LOGICD 19 // logic on mem, direct mode
40 #define OPER_LOGICE 20 // logic on mem, extended mode
41 #define OPER_LOGICEI 21 // logic on mem, extended indir mode
42 #define OPER_LOGICI 22 // logic on mem, indexed no offset
43 #define OPER_LOGICI5 23 // logic on mem, 5 bit indexed offset
44 #define OPER_LOGICI8 24 // logic on mem, 8 bit indexed offset
45 #define OPER_LOGICI16 25 // logic on mem, 16 bit indexed offset
46 #define OPER_LOGICIV 26 // logic on mem, unknown size offset
47
48 #define OUTPUT_DECB 0 // DECB multirecord format
49 #define OUTPUT_RAW 1 // raw sequence of bytes
50 #define OUTPUT_RAWREL 2 // raw but with ORG as a relative offset
51
52 enum
53 {
54 ERR_NONE, // no error
55 ERR_BADOP, // bad opcode
56 ERR_BADSYM, // illegal symbol
57 ERR_DUPSYM, // duplicate symbol definition
58 ERR_NOSYM, // symbol required but not present
59 ERR_FORWARD, // forward references not permitted here
60 ERR_OVERFLOW, // byte overflow
61 ERR_PHASE, // phasing error
62 ERR_BADOPER, // bad operand
63 ERR_SYM, // symbol present where not permitted
64 ERR_UNDEF, // undefined symbol
65 ERR_OVERFLOW3, // bit number out of range
66 ERR_BADEXPR, // invalid expression
67 ERR_BADREG, // invalid register
68 ERR_BADFN, // bad file name
69 ERR_ENDM, // end macro without macro
70 ERR_MACRO, // redefined macro
71 ERR_NESTNAME, // nested namespace
72 ERR_BADCOND, // bad condition
73 ERR_USER, // user error
74 ERR_PRAGMA, // bad pragma
75
76 ERR_MAXERR // last error in the list
77 };
78
79 typedef struct sourceline_s sourceline_t;
80
81 // structure to keep track of errors
82 typedef struct errortab_s errortab_t;
83 struct errortab_s {
84 int errnum;
85 sourceline_t *line;
86 errortab_t *next;
87 };
88
89 typedef struct macroline_s macroline_t;
90 struct macroline_s
91 {
92 char *linetext;
93 macroline_t *next;
94 };
95
96 typedef struct macrotab_s macrotab_t;
97 struct macrotab_s
98 {
99 char *name; // name of the macro
100 macroline_t *linehead; // start of the macro lines
101 macroline_t *linetail; // last line of macro
102 macrotab_t *next;
103 };
104
105
106 // structure to keep track of each line of the source
107 // this also keeps various bits of state about a line
108 struct sourceline_s {
109 char *sourcefile; // name of the source file
110 int lineno; // line number in the source file
111 char *symstr; // symbol on this line (if any)
112 int opcode; // index to instab for this line
113 int opbytes; // actual bytes of opcode
114 int postbyte; // post byte for the instruction
115 int numcodebytes; // how many code bytes for this line
116 unsigned char *codebytes; // actual code for this line
117 int codesize; // size of codebytes
118 // if minaddr and maxaddr are the same, we know exactly which address
119 // we are at so there can be no possible phase error with symbols defined
120 // here; these are *code* addresses
121 int len; // length of this insn
122 int in_macro; // set if it's a macro expansion line
123 int code_symloc;
124 int addrmode; // addressing mode of this insn
125 int addr; // the lowest possible address of this line
126 int dpval; // dp value at this point in the code
127 int hassym; // is there a symbol on this line
128 int addrset; // is this insn a point where the address is *set* (org)
129 int isequ; // does this insn set a symbol address (equ)?
130 int isset; // is the address setting from a "set"?
131 int issetdp; // this insn sets DP
132 int symaddr; // address for the symbol (if we're setting one)
133 // also used for "setdp"
134 int undef; // set if the symbol is undefined
135 int p1f16; // if we forced 16 bit on pass 1 so we can force it on pass 2
136 int nocode; // if set, there is no code to output (rmb)
137 int notinsn; // if this is not a regular insn (used for formatting output)
138 char *line; // the text of the line
139 char *opcstr; // opcode string
140 char *operstr; // operand string
141 char *remainder; // remainder string (whole line if no opcode/operand
142 errortab_t *errors; // errors on this line
143 sourceline_t *next; // next line
144 sourceline_t *prev; // previous line
145 macrotab_t *macro; // pointer to macro table entry if this is a macro
146 int skipped; // set if the line was skipped
147 char *user_error; // user error message
148 int macrodef; // set if it's a macro definition line
149 };
150
151 // structure to keep the symbol table
152 typedef struct symtab_s symtab_t;
153 struct symtab_s {
154 char *symbol; // symbol name
155 sourceline_t *line; // pointer to the line where symbol is defined
156 int addr; // address of symbol (-1 for unknown)
157 int flags; // flags for symbol
158 symtab_t *next; // next symbol
159 };
160
161
162 // keep track of current assembler state
163 typedef struct {
164 int dpval; // current dp value (setdp)
165 int addr; // current address
166 symtab_t *symbol_table;
167 sourceline_t *source_head;
168 sourceline_t *source_tail;
169 int errorcount; // error count
170 int passnum; // which pass are we on?
171 const char *infile; // input file
172 const char *outfile;// output file
173 const char *listfile; // output listing file
174 int debug; // debug mode
175 int outformat; // output format type: 0 = decb, 1 = raw
176 int execaddr; // execution address for the program (END ....)
177 macrotab_t *macros; // pointer to macros
178 int inmacro; // are we in a macro?
179 char *cur_namespace; // current namespace prefix
180 int skipcond; // are we skipping a condition?
181 int skipcount; // number of endc we need before we stop skipping
182 int skipmacro; // are we skipping a macro definition?
183 int noelse; // skipped an else?
184 int pragmas; // what pragmas are in effect?
185 } asmstate_t;
186
187 #define PRAGMA_NOINDEX0TONONE 1
188
189
190 #ifndef __lwasm_c_seen__
191 extern int eval_expr(asmstate_t *as, sourceline_t *cl, char **optr, int *val);
192 extern void register_error(asmstate_t *as, sourceline_t *cl, int errcode);
193 extern int lookupreg3(const char *rlist, char **str);
194 extern int lookupreg(const char *reglist, char **str);
195 extern void lwasm_read_file(asmstate_t *as, char *fname);
196 extern void addcodebyte(asmstate_t *as, sourceline_t *cl, int cb);
197 #endif
198
199 #define SYMFLAG_NONE 0
200 #define SYMFLAG_SET 1
201
202 #ifndef __symtab_c_seen__
203 #include <stdio.h>
204 extern void register_symbol(asmstate_t *as, sourceline_t *cl, char *symstr, int val, int flags);
205 extern int lookup_symbol(asmstate_t *as, char *symstr);
206 extern void list_symbols(asmstate_t *as, FILE *f);
207 #endif
208
209
210 #ifndef __index_c_seen__
211 extern int parse_index_expr(asmstate_t *as, sourceline_t *cl, char **optr, int *postbyte, int *opmode, int *v1);
212 #endif
213
214 #define emit(cb) do { addcodebyte(as, cl, (cb)); } while (0)
215 #define emitop(cb) do { if ((cb) > 0xff) addcodebyte(as, cl, (cb)>>8); addcodebyte(as, cl, (cb) & 0xff); } while (0)
216 #define errorp1(e) do { if (as -> passnum == 1) register_error(as, cl, (e)); } while (0)
217 #define errorp2(e) do { if (as -> passnum == 2) register_error(as, cl, (e)); } while (0)
218
219 #endif //__lwasm_h_seen__