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view src/lwasm.h @ 74:c8c772ef5df9
Checkpointing object target implementation
author | lost |
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date | Thu, 08 Jan 2009 01:18:40 +0000 |
parents | d5fe306f1ab1 |
children | 92eb93bffa28 |
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/* lwasm.h Copyright © 2008 William Astle This file is part of LWASM. LWASM is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. Contains the main defs used by the assembler */ #ifndef __lwasm_h_seen__ #define __lwasm_h_seen__ #include <stdio.h> #include "expr.h" #define OUTPUT_DECB 0 // DECB multirecord format #define OUTPUT_RAW 1 // raw sequence of bytes #define OUTPUT_OBJ 2 // proprietary object file format #define OUTPUT_RAWREL 3 // raw bytes where ORG causes a SEEK in the file // structure for tracking sections #define SECTION_BSS 1 // the section contains no actual code - just uninit vars typedef struct sectiontab_s sectiontab_t; struct sectiontab_s { char *name; // name of the section int offset; // current offset in the section int flags; // section flags sectiontab_t *next; // next section }; // structure for tracking macros typedef struct macrotab_s macrotab_t; struct macrotab_s { char *name; char **lines; int numlines; macrotab_t *next; }; // structure for tracking errors typedef struct lwasm_error_s lwasm_error_t; struct lwasm_error_s { char *mess; // the actual error message lwasm_error_t *next; // ptr to next error }; // structure for keeping track of lines typedef struct lwasm_line_s lwasm_line_t; struct lwasm_line_s { char *text; // the actual text of the line int lineno; // line number within the file char *filename; // file name reference lwasm_line_t *next; // next line lwasm_line_t *prev; // previous line lwasm_error_t *err; // error messages int fsize; // forced size (0 = no forced size) char *sym; // scratch area to record the presence of a symbol unsigned char *bytes; // actual bytes emitted int codelen; // number of bytes emitted int codesize; // the size of the code buffer int codeaddr; // address the code goes at int nocodelen; // for "RMB" type instructions int addrset; // set if this instruction sets the assembly address int symaddr; // set if this instruction sets a symbol addr with EQU or the like int badop; // bad operation - ignore it // the following are used for obj format - for external references, inter-section // references, and intrasection relocations int relocoff; // offset into insn where relocation value goes // the incomplete reference expression struct lwasm_expr_strack_t *expr; }; // for keeping track of symbols #define SYMBOL_SET 1 // the symbol was used for "SET" #define SYMBOL_NORM 0 // no flags typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t; struct lwasm_symbol_ent_s { char *sym; // the symbol int context; // the context number of the symbol (-1 for global) int value; // the value of the symbol int flags; // flags for the symbol lwasm_symbol_ent_t *next; // next symbol in the table lwasm_symbol_ent_t *prev; // previous symbol in the table }; // keep track of current assembler state typedef struct { int dpval; // current dp value (setdp) int addr; // current address int context; // context counter (for local symbols) int errorcount; // error count int passnum; // which pass are we on? int execaddr; // execution address for the program (END ....) int pragmas; // what pragmas are in effect? lwasm_line_t *lineshead; // first line of source code lwasm_line_t *linestail; // last line of source code lwasm_symbol_ent_t *symhead; // first entry in symbol table lwasm_symbol_ent_t *symtail; // last entry in symbol table macrotab_t *macros; // macro table const char *infile; // input file const char *outfile; // output file const char *listfile; // output listing file int outformat; // output format type char **filelist; // files that have been read int filelistlen; // number of files in the list int endseen; // set to true if "end" has been seen int skipcond; // skipping a condition? int skipcount; // how many? int skipmacro; // skipping a macro? int inmacro; // are we currently in a macro? int macroex; // current depth of macro expansion int nextcontext; // next context number int skiplines; // number of lines to skip // items used only for the "object" target sectiontab_t *sections; // pointer to section table sectiontab_t *csect; // current section - NULL if not in one } asmstate_t; #define PRAGMA_NOINDEX0TONONE 1 #ifndef __lwasm_c_seen__ #define __lwasm_E__ extern #else #define __lwasm_E__ #endif __lwasm_E__ int debug_level; __lwasm_E__ int register_error(asmstate_t *as, lwasm_line_t *l, int pass, const char *fmt, ...); __lwasm_E__ void debug_message(int level, const char *fmt, ...); __lwasm_E__ void lwasm_emit(asmstate_t *as, lwasm_line_t *l, int b); __lwasm_E__ void lwasm_emitop(asmstate_t *as, lwasm_line_t *l, int o); __lwasm_E__ int lwasm_lookupreg2(const char *reglist, char **str); __lwasm_E__ int lwasm_lookupreg3(const char *rlist, const char **str); __lwasm_E__ lwasm_expr_stack_t *lwasm_evaluate_expr(asmstate_t *as, lwasm_line_t *l, const char *inp, const char **outp); // return next context number and update it __lwasm_E__ int lwasm_next_context(asmstate_t *as); // also throw an error on expression eval failure // return 0 on ok, -1 on error #define EXPR_NOFLAG 0 #define EXPR_PASS1CONST 1 #define EXPR_PASS2CONST 2 #define EXPR_BYTE 4 __lwasm_E__ int lwasm_expr_result(asmstate_t *as, lwasm_line_t *l, char **inp, int flag, int *val); #undef __lwasm_E__ #ifndef __symbol_c_seen__ #define __lwasm_E__ extern #else #define __lwasm_E__ #endif __lwasm_E__ int lwasm_register_symbol(asmstate_t *as, lwasm_line_t *l, char *sym, int val, int flags); __lwasm_E__ lwasm_symbol_ent_t *lwasm_find_symbol(asmstate_t *as, char *sym, int scontext); __lwasm_E__ int lwasm_set_symbol(asmstate_t *as, char *sym, int scontext, int val); __lwasm_E__ void lwasm_list_symbols(asmstate_t *as, FILE *f); #undef __lwasm_E__ #endif //__lwasm_h_seen__