LWTools Old Repo: lwasm/pass1.c annotate

annotate lwasm/pass1.c @ 232:1009f302ac11

Documented the "Flags" term for object files

author	lost
date	Fri, 12 Jun 2009 04:17:22 +0000
parents	bae1e3ecdce1
children	a58f49a77441

rev	line source
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	1 /*
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	2 pass1.c
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	3 Copyright © 2008 William Astle
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	4
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	5 This file is part of LWASM.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	6
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	7 LWASM is free software: you can redistribute it and/or modify it under the
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	8 terms of the GNU General Public License as published by the Free Software
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	9 Foundation, either version 3 of the License, or (at your option) any later
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	10 version.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	11
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	12 This program is distributed in the hope that it will be useful, but WITHOUT
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	15 more details.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	16
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	17 You should have received a copy of the GNU General Public License along with
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	18 this program. If not, see <http://www.gnu.org/licenses/>.
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	19
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	20
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	21 Handles first pass of assembly
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	22
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	23 First pass involves the following:
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	24
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	25 1. read all lines from the main source file, following all "include"
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	26 directives as appropriate
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	27 2. each operand is evaluated for syntax and futher for value if there are
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	28 multiple addressing sizes available; any undefined or not fully resolved
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	29 value will default to the largest addressing size available (16 bit)
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	30 3. addresses are assigned to every symbol defined in the assembly
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	31 4. macros are defined and expanded at this pass
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	32
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	33 * note: the lines are re-evaluated on the second pass
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	34
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	35 All source lines are read into memory with a record of the file name and
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	36 line number within the files.
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	37
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	38 Lines are one of the following formats:
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	39
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	40 <symbol> <opcode> <operand> <comment>
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	41 <symbol> <opcode> <comment>
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	42 <opcode> <operand> <comment>
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	43 <opcode> <comment>
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	44
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	45 A "*" or ";" appearing anywhere on the line that is not otherwise interpreted
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	46 as part of an operation code or operand introduces a comment.
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	47
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	48 Certain lwasm specific operations are prefixed with a "*" to aid in source
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	49 code portability (like *pragma).
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	50 */
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	51
212 bae1e3ecdce1 More preparation for gnulib integration lost parents: 151 diff changeset	52 #include <config.h>
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	53
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	54 #include <errno.h>
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	55 #include <stdio.h>
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	56 #include <stdlib.h>
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	57
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	58 #include "lwasm.h"
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	59 #include "util.h"
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	60
35 39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	61
39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	62 extern int lwasm_parse_line(asmstate_t as, lwasm_line_t l);
39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	63
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	64 // we can't use standard line inputting functions here because we have to
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	65 // handle non-standard line terminations (CR, LF, CRLF, or LFCR)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	66 int lwasm_read_file(asmstate_t as, const char filename)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	67 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	68 FILE *f;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	69 int c, c2;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	70 lwasm_line_t *nl;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	71 int lineno = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	72 char *fnref;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	73
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	74 // ought to be long enough...we truncate longer lines
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	75 char linebuff[2049];
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	76 int lbloc = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	77 int eol = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	78
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	79 // add filename to list
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	80 as -> filelist = lwasm_realloc(as -> filelist, sizeof(char ) (as -> filelistlen + 1));
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	81 fnref = as -> filelist[as -> filelistlen] = lwasm_strdup(filename);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	82 as -> filelistlen += 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	83
89 11d38c9e5095 Made reading input files use binary mode to avoid newline translation since we handle it ourselves manually lost parents: 85 diff changeset	84 f = fopen(filename, "rb");
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	85 if (!f)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	86 return -1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	87
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	88 for (;;)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	89 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	90 c = fgetc(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	91 if (c == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	92 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	93 linebuff[lbloc] = '\0';
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	94 eol = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	95 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	96 else if (c == '\r')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	97 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	98 linebuff[lbloc] = '\0';
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	99 eol = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	100 // check for '\n':
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	101 c2 = fgetc(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	102 if (c2 == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	103 c = EOF;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	104 else if (c2 != '\n')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	105 ungetc(c2, f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	106 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	107 else if (c == '\n')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	108 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	109 linebuff[lbloc] = '\0';
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	110 eol = 1;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	111 // check for '\r':
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	112 c2 = fgetc(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	113 if (c2 == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	114 c = EOF;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	115 else if (c2 != '\r')
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	116 ungetc(c2, f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	117 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	118 else
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	119 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	120 // silently ignore characters past 2K on a line... FIXME
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	121 if (lbloc < 2048)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	122 linebuff[lbloc++] = c;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	123 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	124 if (eol)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	125 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	126 eol = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	127 lbloc = 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	128 nl = lwasm_alloc(sizeof(lwasm_line_t));
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	129 nl -> text = lwasm_strdup(linebuff);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	130 nl -> lineno = lineno++;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	131 nl -> filename = fnref;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	132 nl -> next = NULL;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	133 nl -> prev = as -> linestail;
26 d2e86babd958 Added error tracking infrastructure lost parents: 22 diff changeset	134 nl -> err = NULL;
28 c0ff62e5ad39 Added register list mode handler lost parents: 27 diff changeset	135 nl -> fsize = 0;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 35 diff changeset	136 nl -> sym = NULL;
42 4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 37 diff changeset	137 nl -> bytes = NULL;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 37 diff changeset	138 nl -> codelen = 0;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 37 diff changeset	139 nl -> codesize = 0;
46 b962cee20bf4 Ported output modules forward from old version lost parents: 44 diff changeset	140 nl -> nocodelen = 0;
49 21ae0fab469b Added needed infra for useful listing of EQU and ORG type statements lost parents: 46 diff changeset	141 nl -> addrset = 0;
21ae0fab469b Added needed infra for useful listing of EQU and ORG type statements lost parents: 46 diff changeset	142 nl -> symaddr = -1;
67 d5fe306f1ab1 Fixed numerous bugs in macro handling lost parents: 58 diff changeset	143 nl -> badop = 0;
85 918be0c02239 Started adding object target output lost parents: 67 diff changeset	144 nl -> relocoff = -1;
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	145 if (as -> linestail)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	146 as -> linestail -> next = nl;
44 2330b88f9600 Added simple output listing lost parents: 42 diff changeset	147 as -> linestail = nl;
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	148 if (!(as -> lineshead))
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	149 as -> lineshead = nl;
35 39d750ee8d34 Added error display and fixed infinite loop in lwasm_parse_line() lost parents: 28 diff changeset	150 lwasm_parse_line(as, nl);
54 360d53062bb9 Fixed typo in instruction table and added END directive lost parents: 49 diff changeset	151 if (as -> endseen)
360d53062bb9 Fixed typo in instruction table and added END directive lost parents: 49 diff changeset	152 break;
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	153 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	154 if (c == EOF)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	155 break;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	156 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	157
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	158 fclose(f);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	159 return 0;
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	160 }
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	161
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	162 void lwasm_pass1(asmstate_t *as)
05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	163 {
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	164 as -> passnum = 1;
27 f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	165 as -> addr = 0;
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 54 diff changeset	166 as -> nextcontext = 1;
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	167
44 2330b88f9600 Added simple output listing lost parents: 42 diff changeset	168 debug_message(1, "Entering pass 1");
21 3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	169 if (lwasm_read_file(as, as -> infile) < 0)
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	170 {
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	171 fprintf(stderr, "Error reading input file '%s'", as -> infile);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	172 perror("");
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	173 exit(1);
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	174 }
3c0e5f311c95 Added reading of input file for pass1 lost parents: 13 diff changeset	175
13 05d4115b4860 Started work on new expression evaluator system and major code re-work for next release lost parents: diff changeset	176 }

Mercurial > hg-old > index.cgi

annotate lwasm/pass1.c @ 232:1009f302ac11