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comparison src/lwasm.h @ 37:538e15927776

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Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
author lost
date Sat, 03 Jan 2009 04:20:49 +0000
parents 9bd0fbfe7405
children 9bd584bb6296
comparison
equal deleted inserted replaced
36:99e3b3310bac 37:538e15927776
22 22
23 23
24 #ifndef __lwasm_h_seen__ 24 #ifndef __lwasm_h_seen__
25 #define __lwasm_h_seen__ 25 #define __lwasm_h_seen__
26 26
27 #include "expr.h"
28
27 #define OUTPUT_DECB 0 // DECB multirecord format 29 #define OUTPUT_DECB 0 // DECB multirecord format
28 #define OUTPUT_RAW 1 // raw sequence of bytes 30 #define OUTPUT_RAW 1 // raw sequence of bytes
29 #define OUTPUT_OBJ 2 // proprietary object file format 31 #define OUTPUT_OBJ 2 // proprietary object file format
32
30 33
31 // structure for tracking errors 34 // structure for tracking errors
32 typedef struct lwasm_error_s lwasm_error_t; 35 typedef struct lwasm_error_s lwasm_error_t;
33 struct lwasm_error_s 36 struct lwasm_error_s
34 { 37 {
44 char *filename; // file name reference 47 char *filename; // file name reference
45 lwasm_line_t *next; // next line 48 lwasm_line_t *next; // next line
46 lwasm_line_t *prev; // previous line 49 lwasm_line_t *prev; // previous line
47 lwasm_error_t *err; // error messages 50 lwasm_error_t *err; // error messages
48 int fsize; // forced size (0 = no forced size) 51 int fsize; // forced size (0 = no forced size)
52 char *sym; // scratch area to record the presence of a symbol
53 };
54
55 // for keeping track of symbols
56 typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t;
57 struct lwasm_symbol_ent_s
58 {
59 char *sym; // the symbol
60 int context; // the context number of the symbol (-1 for global)
61 int value; // the value of the symbol
62 lwasm_symbol_ent_t *next; // next symbol in the table
63 lwasm_symbol_ent_t *prev; // previous symbol in the table
49 }; 64 };
50 65
51 // keep track of current assembler state 66 // keep track of current assembler state
52 typedef struct { 67 typedef struct {
53 int dpval; // current dp value (setdp) 68 int dpval; // current dp value (setdp)
54 int addr; // current address 69 int addr; // current address
70 int context; // context counter (for local symbols)
55 int errorcount; // error count 71 int errorcount; // error count
56 int passnum; // which pass are we on? 72 int passnum; // which pass are we on?
57 int execaddr; // execution address for the program (END ....) 73 int execaddr; // execution address for the program (END ....)
58 int pragmas; // what pragmas are in effect? 74 int pragmas; // what pragmas are in effect?
59 75
60 lwasm_line_t *lineshead; // first line of source code 76 lwasm_line_t *lineshead; // first line of source code
61 lwasm_line_t *linestail; // last line of source code 77 lwasm_line_t *linestail; // last line of source code
78
79 lwasm_symbol_ent_t *symhead; // first entry in symbol table
80 lwasm_symbol_ent_t *symtail; // last entry in symbol table
62 81
63 const char *infile; // input file 82 const char *infile; // input file
64 const char *outfile; // output file 83 const char *outfile; // output file
65 const char *listfile; // output listing file 84 const char *listfile; // output listing file
66 int debug; // debug mode 85 int debug; // debug mode
82 __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b); 101 __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b);
83 __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o); 102 __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o);
84 __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str); 103 __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str);
85 __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str); 104 __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str);
86 105
106 __lwasm_E__ lwasm_expr_stack_t *lwasm_evaluate_expr(asmstate_t *as, lwasm_line_t *l, const char *inp, const char **outp);
107
87 #undef __lwasm_E__ 108 #undef __lwasm_E__
88 109
89 110
90 #ifndef __symtab_c_seen__ 111 #ifndef __symbol_c_seen__
91 //extern void register_symbol(asmstate_t *as, sourceline_t *cl, char *symstr, int val, int flags); 112 #define __lwasm_E__ extern
92 //extern int lookup_symbol(asmstate_t *as, char *symstr); 113 #else
93 //extern void list_symbols(asmstate_t *as, FILE *f); 114 #define __lwasm_E__
94 #endif 115 #endif
116
117 __lwasm_E__ int lwasm_register_symbol(asmstate_t *as, lwasm_line_t *l, char *sym, int val);
118 __lwasm_E__ lwasm_symbol_ent_t *lwasm_find_symbol(asmstate_t *as, char *sym, int scontext);
119 __lwasm_E__ int lwasm_set_symbol(asmstate_t *as, char *sym, int scontext, int val);
120
121 #undef __lwasm_E__
122
95 123
96 124
97 #endif //__lwasm_h_seen__ 125 #endif //__lwasm_h_seen__