Mercurial > hg-old > index.cgi

comparison src/lwasm.h @ 77:a338d496350e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Checkpointing conversion to allow object target
author lost
date Fri, 09 Jan 2009 04:23:00 +0000
parents 2fe5fd7d65a3
children 121bf4a588ea
comparison
equal deleted inserted replaced
76:2fe5fd7d65a3 77:a338d496350e
60 char *mess; // the actual error message 60 char *mess; // the actual error message
61 lwasm_error_t *next; // ptr to next error 61 lwasm_error_t *next; // ptr to next error
62 }; 62 };
63 63
64 // structure for keeping track of lines 64 // structure for keeping track of lines
65 // it also as space for 4 expressions which is enough for all known
66 // instructions and addressing modes
67 // on pass 1, the expressions are parsed, on pass 2 they are re-evaluated
68 // to determine constancy
65 typedef struct lwasm_line_s lwasm_line_t; 69 typedef struct lwasm_line_s lwasm_line_t;
66 struct lwasm_line_s { 70 struct lwasm_line_s {
67 char *text; // the actual text of the line 71 char *text; // the actual text of the line
68 int lineno; // line number within the file 72 int lineno; // line number within the file
69 char *filename; // file name reference 73 char *filename; // file name reference
82 int badop; // bad operation - ignore it 86 int badop; // bad operation - ignore it
83 87
84 // the following are used for obj format - for external references, inter-section 88 // the following are used for obj format - for external references, inter-section
85 // references, and intrasection relocations 89 // references, and intrasection relocations
86 int relocoff; // offset into insn where relocation value goes 90 int relocoff; // offset into insn where relocation value goes
87 // the incomplete reference expression 91 lwasm_expr_stack_t *exprs[4]; // non-constant expression values
88 lwasm_expr_stack_t *expr; 92 int exprvals[4]; // constant expression values
93 char *exprends[4]; // pointer to character after end of expression
89 }; 94 };
90 95
91 // for keeping track of symbols 96 // for keeping track of symbols
92 #define SYMBOL_SET 1 // the symbol was used for "SET" 97 #define SYMBOL_SET 1 // the symbol was used for "SET"
93 #define SYMBOL_COMPLEX 2 // register symbol as a complex symbol (from l -> expr) 98 #define SYMBOL_COMPLEX 2 // register symbol as a complex symbol (from l -> expr)
173 #define EXPR_NOFLAG 0 178 #define EXPR_NOFLAG 0
174 #define EXPR_PASS1CONST 1 // no forward references on pass 1 179 #define EXPR_PASS1CONST 1 // no forward references on pass 1
175 #define EXPR_PASS2CONST 2 // no undefined references on pass 2 180 #define EXPR_PASS2CONST 2 // no undefined references on pass 2
176 #define EXPR_BYTE 4 // the result must fit within 8 bits 181 #define EXPR_BYTE 4 // the result must fit within 8 bits
177 #define EXPR_COMPLEX 8 // a non-constant result is permitted (stored in l -> expr) 182 #define EXPR_COMPLEX 8 // a non-constant result is permitted (stored in l -> expr)
183 #define EXPR_NOINTERSECT 16 // only allow intra-section values (pass 2)
178 184
179 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val); 185 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val);
186 __lwasm_E__ int lwasm_expr_result2(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val, int slot);
180 187
181 #undef __lwasm_E__ 188 #undef __lwasm_E__
182 189
183 190
184 #ifndef __symbol_c_seen__ 191 #ifndef __symbol_c_seen__