LWTools Old Repo: lwasm/lwasm.c annotate

annotate lwasm/lwasm.c @ 238:a9a14e6b4bc8

Fixed os9 module CRC calculation

author	lost
date	Sat, 15 Aug 2009 05:26:02 +0000
parents	a58f49a77441
children	1106ec189e4f

rev	line source
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	1 /*
4 34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	2 lwasm.c
55 8e32696380f3 added expression evaluation and checking function lost parents: 52 diff changeset	3 Copyright © 2009 William Astle
4 34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	4
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	5 This file is part of LWASM.
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	6
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	7 LWASM is free software: you can redistribute it and/or modify it under the
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	8 terms of the GNU General Public License as published by the Free Software
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	9 Foundation, either version 3 of the License, or (at your option) any later
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	10 version.
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	11
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	12 This program is distributed in the hope that it will be useful, but WITHOUT
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	15 more details.
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	16
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	17 You should have received a copy of the GNU General Public License along with
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	18 this program. If not, see <http://www.gnu.org/licenses/>.
34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	19
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	20
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	21 Contains random functions used by the assembler
4 34568fab6058 Fixed package to include all required files; also added copyright preamble to all source files lost parents: 0 diff changeset	22 */
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	23
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	24 #define __lwasm_c_seen__
212 bae1e3ecdce1 More preparation for gnulib integration lost parents: 151 diff changeset	25 #include <config.h>
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	26
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	27 #include <stdarg.h>
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	28 #include <stdlib.h>
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	29 #include <stdio.h>
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	30
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	31 #include "lwasm.h"
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	32 #include "util.h"
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	33 #include "expr.h"
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	34
38 9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	35 int debug_level = 0;
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	36
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	37 int register_error(asmstate_t as, lwasm_line_t l, int pass, const char *fmt, ...)
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	38 {
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	39 lwasm_error_t *e;
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	40 va_list args;
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	41 char errbuff[1024];
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	42 int r;
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	43
143 0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 101 diff changeset	44 if (!l)
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 101 diff changeset	45 return;
0ee5f65bccf9 Added pragma to allow all undefined symbols to be considered external and also added a --pragma command line option lost parents: 101 diff changeset	46
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	47 if (as -> passnum != pass)
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	48 return;
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	49
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	50 va_start(args, fmt);
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	51
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	52 e = lwasm_alloc(sizeof(lwasm_error_t));
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	53
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	54 e -> next = l -> err;
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	55 l -> err = e;
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	56
57495da01900 Initial checking of LWASM lost parents: diff changeset	57 as -> errorcount++;
57495da01900 Initial checking of LWASM lost parents: diff changeset	58
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	59 r = vsnprintf(errbuff, 1024, fmt, args);
d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	60 e -> mess = lwasm_strdup(errbuff);
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	61
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	62 va_end(args);
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	63
26 d2e86babd958 Added error tracking infrastructure lost parents: 13 diff changeset	64 return r;
0 57495da01900 Initial checking of LWASM lost parents: diff changeset	65 }
27 f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	66
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	67 void lwasm_emit(asmstate_t as, lwasm_line_t l, int b)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	68 {
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	69 as -> addr += 1;
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 57 diff changeset	70 as -> addr &= 0xffff;
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 57 diff changeset	71
74 c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	72 if (as -> outformat == OUTPUT_OBJ && !(as -> csect))
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	73 {
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	74 register_error(as, l, 1, "Output not allowed outside sections with obj target");
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	75 return;
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	76 }
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	77 if (as -> outformat == OUTPUT_OBJ && as -> csect -> flags & SECTION_BSS)
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	78 {
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	79 register_error(as, l, 1, "Output not allowed inside BSS sections");
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	80 return;
c8c772ef5df9 Checkpointing object target implementation lost parents: 60 diff changeset	81 }
236 a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	82
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	83 if (as -> outformat == OUTPUT_OS9 && as -> inmod == 0)
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	84 {
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	85 register_error(as, l, 1, "Output not allowed outside of module in OS9 mode");
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	86 return;
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	87 }
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	88
27 f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	89 if (as -> passnum == 1)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	90 return;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	91
42 4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	92
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	93 if (l -> codelen >= l -> codesize)
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	94 {
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	95 l -> bytes = realloc(l -> bytes, l -> codesize + 16);
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	96 l -> codesize += 16;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	97 }
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	98 l -> bytes[l -> codelen] = b & 0xff;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit() lost parents: 39 diff changeset	99 l -> codelen += 1;
236 a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	100
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	101 if (as -> outformat == OUTPUT_OS9 && as -> inmod)
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	102 {
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	103 // calc the CRC
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	104 b &= 0xff;
a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	105
238 a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	106 b ^= (as -> crc)[0];
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	107 (as -> crc)[0] = (as -> crc)[1];
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	108 (as -> crc)[1] = (as -> crc)[2];
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	109 (as -> crc)[1] ^= (b >> 7);
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	110 (as -> crc)[2] = (b << 1);
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	111 (as -> crc)[1] ^= (b >> 2);
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	112 (as -> crc)[2] ^= (b << 6);
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	113 b ^= (b << 1);
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	114 b ^= (b << 2);
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	115 b ^= (b << 4);
236 a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	116 if (b & 0x80)
238 a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	117 {
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	118 (as -> crc)[0] ^= 0x80;
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	119 (as -> crc)[2] ^= 0x21;
a9a14e6b4bc8 Fixed os9 module CRC calculation lost parents: 236 diff changeset	120 }
236 a58f49a77441 Added os9 target, pragma to control whether $ localizes a symbol, and fixed some condition nesting bugs lost parents: 212 diff changeset	121 }
27 f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	122 }
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	123
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	124 void lwasm_emitop(asmstate_t as, lwasm_line_t l, int o)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	125 {
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	126 if (o >= 0x100)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	127 lwasm_emit(as, l, o >> 8);
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	128 lwasm_emit(as, l, o & 0xff);
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	129 }
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	130
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	131 int lwasm_lookupreg2(const char reglist, char *str)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	132 {
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	133 int rval = 0;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	134
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	135 while (*reglist)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	136 {
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	137 if (toupper(*str) == reglist)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	138 {
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	139 // first char matches
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	140 if (reglist[1] == ' ' && !isalpha((str + 1)))
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	141 break;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	142 if (toupper((str + 1)) == reglist[1])
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	143 break;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	144 }
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	145 reglist += 2;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	146 rval++;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	147 }
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	148 if (!*reglist)
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	149 return -1;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	150 if (reglist[1] == ' ')
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	151 (*str)++;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	152 else
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	153 (*str) += 2;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	154 return rval;
f736579569b4 Added handlers for inherent and register to register instructions lost parents: 26 diff changeset	155 }
32 9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	156
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	157 int lwasm_lookupreg3(const char rlist, const char *str)
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	158 {
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	159 int rval = 0;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	160 int f = 0;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	161 const char *reglist = rlist;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	162
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	163 while (*reglist)
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	164 {
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	165 if (toupper(*str) == reglist)
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	166 {
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	167 // first char matches
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	168 if (reglist[1] == ' ')
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	169 {
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	170 f = 1;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	171 break;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	172 }
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	173 if (toupper((str + 1)) == reglist[1])
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	174 {
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	175 // second char matches
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	176 if (reglist[2] == ' ')
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	177 {
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	178 f = 1;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	179 break;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	180 }
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	181 if (toupper((str + 2)) == reglist[2])
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	182 {
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	183 f = 1;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	184 break;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	185 }
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	186 }
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	187 }
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	188 reglist += 3;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	189 rval++;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	190 }
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	191 if (f == 0)
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	192 return -1;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	193
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	194
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	195 reglist = rval * 3 + rlist;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	196 if (reglist[1] == ' ')
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	197 (*str) += 1;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	198 else if (reglist[2] == ' ')
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	199 (*str) += 2;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	200 else
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	201 (*str)+=3;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	202 return rval;
9bd0fbfe7405 Added basic indexed mode handling lost parents: 27 diff changeset	203 }
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	204
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	205 struct symstateinfo
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	206 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	207 asmstate_t *as;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	208 lwasm_line_t *l;
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	209 int flags;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	210 };
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	211
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	212 lwasm_expr_stack_t lwasm_expr_lookup_symbol(char sym, void *state)
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	213 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	214 lwasm_symbol_ent_t *se;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	215 struct symstateinfo *st;
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	216 lwasm_expr_stack_t *rs;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	217 lwasm_expr_term_t *t;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	218 lwasm_expr_stack_node_t *n;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	219
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	220 int val;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	221
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	222 st = state;
52 b9856da2674a Added file inclusion lost parents: 42 diff changeset	223 debug_message(3, "lwasm_expr_lookup_symbol(): find '%s' (context=%d)", sym, st -> as -> context);
b9856da2674a Added file inclusion lost parents: 42 diff changeset	224
60 309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	225 // check for special symbols first...
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	226 if (sym[1] == '\0')
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	227 {
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	228 switch (sym[0])
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	229 {
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	230 // current line address
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	231 case '*':
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	232 case '.':
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	233 val = st -> l -> codeaddr;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	234 goto retconst;
60 309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	235
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	236 case '<':
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	237 // previous branch point
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	238 // not implemented
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	239 break;
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	240 case '>':
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	241 // next branch point
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	242 // not implemented
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	243 break;
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	244 }
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	245 }
309810f39ab7 Implemented the * and . special symbols lost parents: 58 diff changeset	246
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	247 // look for local symbol first then global symbol
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	248 se = lwasm_find_symbol(st -> as, sym, st -> as -> context);
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	249 if (!se)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	250 se = lwasm_find_symbol(st -> as, sym, -1);
52 b9856da2674a Added file inclusion lost parents: 42 diff changeset	251 debug_message(3, "lwasm_expr_lookup_symbol(): got '%p'", se);
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	252 if (!se)
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	253 {
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	254 register_error(st -> as, st -> l, 2, "Undefined symbol '%s'", sym);
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	255 return NULL;
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	256 }
92 ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list lost parents: 84 diff changeset	257 // external reference - can not resolve it
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list lost parents: 84 diff changeset	258 if (se -> flags & SYMBOL_EXTERN)
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list lost parents: 84 diff changeset	259 {
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list lost parents: 84 diff changeset	260 return NULL;
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list lost parents: 84 diff changeset	261 }
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	262 if (st -> flags & EXPR_SECTCONST)
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	263 {
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	264 if (se -> sect == st -> l -> sect)
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	265 {
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	266 if (se -> expr)
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	267 goto retsym;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	268 val = se -> value;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	269 goto retconst;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	270 }
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	271 }
93 34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default lost parents: 92 diff changeset	272 if (st -> as -> outformat == OUTPUT_OBJ && se -> sect != NULL)
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default lost parents: 92 diff changeset	273 {
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default lost parents: 92 diff changeset	274 return NULL;
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default lost parents: 92 diff changeset	275 }
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default lost parents: 92 diff changeset	276 if (st -> as -> outformat != OUTPUT_OBJ \|\| se -> sect == NULL)
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	277 {
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	278 // global symbol, intrasegment reference, or not an object target
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	279 val = se -> value;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	280 goto retconst;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	281 }
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	282
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	283 // an intersegment reference will return as NULL (to be resolved at output/link time)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	284 // if se -> expr is NULL, it has to be an intersegment reference here
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	285 if (se -> expr == NULL)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	286 {
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	287 return NULL;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	288 }
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	289
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	290 retsym:
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	291 // duplicate the expression for return
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	292 rs = lwasm_expr_stack_create();
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	293 for (n = se -> expr -> head; n; n = n -> next)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	294 {
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	295 lwasm_expr_stack_push(rs, n -> term);
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	296 }
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	297 return rs;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	298
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	299 retconst:
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	300 rs = lwasm_expr_stack_create();
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	301 t = lwasm_expr_term_create_int(val);
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	302 lwasm_expr_stack_push(rs, t);
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	303 lwasm_expr_term_free(t);
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	304 return rs;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	305 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	306
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	307 lwasm_expr_stack_t lwasm_evaluate_expr(asmstate_t as, lwasm_line_t l, const char inp, const char **outp, int flags)
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	308 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	309 struct symstateinfo st;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	310
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	311 st.as = as;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	312 st.l = l;
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	313 st.flags = flags;
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	314
38 9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	315 debug_message(2, "Evaluate expression: %s", inp);
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	316
37 538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	317 return(lwasm_expr_eval(inp, outp, lwasm_expr_lookup_symbol, &st));
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes lost parents: 32 diff changeset	318 }
38 9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	319
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	320
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	321 int lwasm_reevaluate_expr(asmstate_t as, lwasm_line_t l, lwasm_expr_stack_t *s, int flags)
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	322 {
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	323 struct symstateinfo st;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	324
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	325 st.as = as;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	326 st.l = l;
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	327 st.flags = flags;
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	328 return(lwasm_expr_reval(s, lwasm_expr_lookup_symbol, &st));
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	329 }
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	330
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	331 // return 1 if no undefined symbols (externals and incompletes are okay)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	332 // return 0 if there are undefined symbols
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	333 int lwasm_expr_result_ckconst(asmstate_t as, lwasm_expr_stack_t s)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	334 {
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	335 lwasm_expr_stack_node_t *n;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	336 lwasm_symbol_ent_t *se;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	337
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	338 if (as -> outformat != OUTPUT_OBJ)
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	339 {
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	340 if (lwasm_expr_is_constant(s))
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	341 return 1;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	342 else
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	343 return 0;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	344 }
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	345
76 2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	346 for (n = s -> head; n; n = n -> next)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	347 {
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	348 if (n -> term -> term_type == LWASM_TERM_SYM)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	349 {
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	350 se = lwasm_find_symbol(as, n -> term -> symbol, as -> context);
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	351 if (!se)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	352 se = lwasm_find_symbol(as, n -> term -> symbol, -1);
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	353 if (!se)
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	354 return 0;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	355 }
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	356 }
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	357 return 1;
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	358 }
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	359
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	360 /*
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	361 Evaluate an expression according to the flag value. Return 0 if a constant result was
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	362 obtained, 1 if an incomplete result was obtained, and -1 if an error was flagged.
2fe5fd7d65a3 Checkpointing object target implementation lost parents: 74 diff changeset	363
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	364 */
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	365 int lwasm_expr_result2(asmstate_t as, lwasm_line_t l, char *inp, int flag, int val, int slot)
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	366 {
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	367 lwasm_expr_stack_t *s = NULL;
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	368 const char *ep;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	369 int rval;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	370
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	371 if ((as -> passnum == 1 && !(flag & EXPR_REEVAL)) \|\| slot < 0)
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	372 {
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	373 s = lwasm_evaluate_expr(as, l, *inp, &ep, flag);
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	374 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	375 l -> exprs[slot] = s;
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	376 if (!s)
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	377 {
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	378 register_error(as, l, 1, "Bad expression");
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	379 *val = 0;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	380 return -1;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	381 }
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	382 inp = (char )ep;
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	383 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	384 {
94 83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't lost parents: 93 diff changeset	385 l -> exprends[slot] = (char *)ep;
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	386 l -> exprvals[slot] = lwasm_expr_get_value(s);
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	387 }
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	388 }
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	389 else if (l -> exprs[slot])
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	390 {
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	391 s = l -> exprs[slot];
101 f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly lost parents: 98 diff changeset	392 lwasm_reevaluate_expr(as, l, s, flag);
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	393 l -> exprvals[slot] = lwasm_expr_get_value(s);
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	394 }
84 e12edcfbebd5 Fixed problem with expression evaluation infrastructure not advancing input pointer on pass 2 lost parents: 79 diff changeset	395 if (as -> passnum == 2 && slot >= 0)
e12edcfbebd5 Fixed problem with expression evaluation infrastructure not advancing input pointer on pass 2 lost parents: 79 diff changeset	396 *inp = l -> exprends[slot];
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	397
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	398 if (s && lwasm_expr_is_constant(s))
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	399 {
94 83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't lost parents: 93 diff changeset	400 *val = lwasm_expr_get_value(s);
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	401 lwasm_expr_stack_free(s);
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	402 l -> exprs[slot] = NULL;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	403 s = NULL;
94 83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't lost parents: 93 diff changeset	404 return 0;
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	405 }
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	406
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	407 if (!s && slot >= 0)
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	408 {
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	409 *val = l -> exprvals[slot];
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	410 return 0;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	411 }
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	412 else if (!s)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	413 {
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	414 *val = 0;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	415 return 0;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	416 }
78 121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	417
121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	418 // was a constant result on pass 1 requested?
121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	419 // that means we must have a constant on either pass
121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	420 if (flag & EXPR_PASS1CONST)
121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	421 {
121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	422 *val = 0;
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	423 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	424 l -> exprvals[slot] = 0;
78 121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	425 register_error(as, l, 1, "Illegal forward, external, or inter-section reference");
121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	426 lwasm_expr_stack_free(s);
79 d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	427 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling lost parents: 78 diff changeset	428 l -> exprs[slot] = NULL;
78 121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	429 return -1;
121bf4a588ea Checkpointing deployment of non-constant expression handling lost parents: 77 diff changeset	430 }
77 a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	431
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	432 return 1;
a338d496350e Checkpointing conversion to allow object target lost parents: 76 diff changeset	433 }
55 8e32696380f3 added expression evaluation and checking function lost parents: 52 diff changeset	434
38 9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	435 void debug_message(int level, const char *fmt, ...)
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	436 {
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	437 va_list args;
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	438
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	439 va_start(args, fmt);
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	440 if (debug_level >= level)
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	441 {
39 efa19ec69df9 tweaked debugging system for expression handler lost parents: 38 diff changeset	442 if (level > 0)
efa19ec69df9 tweaked debugging system for expression handler lost parents: 38 diff changeset	443 fprintf(stderr, "DEBUG %d: ", level);
38 9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	444 vfprintf(stderr, fmt, args);
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	445 fputc('\n', stderr);
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	446 }
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	447 va_end(args);
9bd584bb6296 Added debugging message infrastructure lost parents: 37 diff changeset	448 }
57 035b95a3690f Added conditional assembly and macros lost parents: 55 diff changeset	449
035b95a3690f Added conditional assembly and macros lost parents: 55 diff changeset	450 int lwasm_next_context(asmstate_t *as)
035b95a3690f Added conditional assembly and macros lost parents: 55 diff changeset	451 {
58 b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 57 diff changeset	452 int r;
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 57 diff changeset	453 r = as -> nextcontext;
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 57 diff changeset	454 as -> nextcontext += 1;
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 57 diff changeset	455 debug_message(3, "lwasm_next_context(): %d (%d) pass %d", r, as -> nextcontext, as -> passnum);
b1d81800bc91 Added symbol listing to list file; various fixes lost parents: 57 diff changeset	456 return r;
57 035b95a3690f Added conditional assembly and macros lost parents: 55 diff changeset	457 }
035b95a3690f Added conditional assembly and macros lost parents: 55 diff changeset	458

Mercurial > hg-old > index.cgi

annotate lwasm/lwasm.c @ 238:a9a14e6b4bc8