Mercurial > hg-old > index.cgi

annotate lwasm/lwasm.c @ 234:4e25aa2af73c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Adjusted synonyms for TFM
author lost
date Fri, 12 Jun 2009 04:55:16 +0000
parents bae1e3ecdce1
children a58f49a77441
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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 }
27
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
82 if (as -> passnum == 1)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
83 return;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
84
42
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
85
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
86 if (l -> codelen >= l -> codesize)
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
87 {
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
88 l -> bytes = realloc(l -> bytes, l -> codesize + 16);
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
89 l -> codesize += 16;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
90 }
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
91 l -> bytes[l -> codelen] = b & 0xff;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
92 l -> codelen += 1;
27
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
93 }
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
94
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
95 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
96 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
97 if (o >= 0x100)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
98 lwasm_emit(as, l, o >> 8);
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
99 lwasm_emit(as, l, o & 0xff);
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
100 }
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
101
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
102 int lwasm_lookupreg2(const char *reglist, char **str)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
103 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
104 int rval = 0;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
105
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
106 while (*reglist)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
107 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
108 if (toupper(**str) == *reglist)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
109 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
110 // first char matches
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
111 if (reglist[1] == ' ' && !isalpha(*(*str + 1)))
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
112 break;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
113 if (toupper(*(*str + 1)) == reglist[1])
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
114 break;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
115 }
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
116 reglist += 2;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
117 rval++;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
118 }
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
119 if (!*reglist)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
120 return -1;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
121 if (reglist[1] == ' ')
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
122 (*str)++;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
123 else
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
124 (*str) += 2;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
125 return rval;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
126 }
32
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
127
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
128 int lwasm_lookupreg3(const char *rlist, const char **str)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
129 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
130 int rval = 0;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
131 int f = 0;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
132 const char *reglist = rlist;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
133
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
134 while (*reglist)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
135 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
136 if (toupper(**str) == *reglist)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
137 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
138 // first char matches
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
139 if (reglist[1] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
140 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
141 f = 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
142 break;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
143 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
144 if (toupper(*(*str + 1)) == reglist[1])
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
145 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
146 // second char matches
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
147 if (reglist[2] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
148 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
149 f = 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
150 break;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
151 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
152 if (toupper(*(*str + 2)) == reglist[2])
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
153 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
154 f = 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
155 break;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
156 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
157 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
158 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
159 reglist += 3;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
160 rval++;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
161 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
162 if (f == 0)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
163 return -1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
164
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
165
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
166 reglist = rval * 3 + rlist;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
167 if (reglist[1] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
168 (*str) += 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
169 else if (reglist[2] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
170 (*str) += 2;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
171 else
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
172 (*str)+=3;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
173 return rval;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
174 }
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
175
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
176 struct symstateinfo
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
177 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
178 asmstate_t *as;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
179 lwasm_line_t *l;
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
180 int flags;
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
181 };
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
182
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
183 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
184 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
185 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
186 struct symstateinfo *st;
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
187 lwasm_expr_stack_t *rs;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
188 lwasm_expr_term_t *t;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
189 lwasm_expr_stack_node_t *n;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
190
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
191 int val;
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
192
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
193 st = state;
52
b9856da2674a Added file inclusion
lost
parents: 42
diff changeset
194 debug_message(3, "lwasm_expr_lookup_symbol(): find '%s' (context=%d)", sym, st -> as -> context);
b9856da2674a Added file inclusion
lost
parents: 42
diff changeset
195
60
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
196 // check for special symbols first...
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
197 if (sym[1] == '\0')
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
198 {
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
199 switch (sym[0])
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
200 {
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
201 // current line address
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
202 case '*':
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
203 case '.':
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
204 val = st -> l -> codeaddr;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
205 goto retconst;
60
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
206
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
207 case '<':
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
208 // previous branch point
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
209 // not implemented
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
210 break;
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
211 case '>':
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
212 // next branch point
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
213 // not implemented
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
214 break;
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
215 }
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
216 }
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
217
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
218 // 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
219 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
220 if (!se)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
221 se = lwasm_find_symbol(st -> as, sym, -1);
52
b9856da2674a Added file inclusion
lost
parents: 42
diff changeset
222 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
223 if (!se)
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
224 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
225 register_error(st -> as, st -> l, 2, "Undefined symbol '%s'", sym);
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
226 return NULL;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
227 }
92
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list
lost
parents: 84
diff changeset
228 // 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
229 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
230 {
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list
lost
parents: 84
diff changeset
231 return NULL;
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list
lost
parents: 84
diff changeset
232 }
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
233 if (st -> flags & EXPR_SECTCONST)
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
234 {
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
235 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
236 {
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
237 if (se -> expr)
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
238 goto retsym;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
239 val = se -> value;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
240 goto retconst;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
241 }
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
242 }
93
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
243 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
244 {
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
245 return NULL;
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
246 }
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
247 if (st -> as -> outformat != OUTPUT_OBJ || se -> sect == NULL)
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
248 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
249 // global symbol, intrasegment reference, or not an object target
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
250 val = se -> value;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
251 goto retconst;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
252 }
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
253
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
254 // an intersegment reference will return as NULL (to be resolved at output/link time)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
255 // if se -> expr is NULL, it has to be an intersegment reference here
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
256 if (se -> expr == NULL)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
257 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
258 return NULL;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
259 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
260
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
261 retsym:
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
262 // duplicate the expression for return
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
263 rs = lwasm_expr_stack_create();
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
264 for (n = se -> expr -> head; n; n = n -> next)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
265 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
266 lwasm_expr_stack_push(rs, n -> term);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
267 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
268 return rs;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
269
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
270 retconst:
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
271 rs = lwasm_expr_stack_create();
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
272 t = lwasm_expr_term_create_int(val);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
273 lwasm_expr_stack_push(rs, t);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
274 lwasm_expr_term_free(t);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
275 return rs;
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
276 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
277
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
278 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
279 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
280 struct symstateinfo st;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
281
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
282 st.as = as;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
283 st.l = l;
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
284 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
285
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
286 debug_message(2, "Evaluate expression: %s", inp);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
287
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
288 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
289 }
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
290
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
291
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
292 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
293 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
294 struct symstateinfo st;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
295
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
296 st.as = as;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
297 st.l = l;
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
298 st.flags = flags;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
299 return(lwasm_expr_reval(s, lwasm_expr_lookup_symbol, &st));
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
300 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
301
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
302 // return 1 if no undefined symbols (externals and incompletes are okay)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
303 // return 0 if there are undefined symbols
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
304 int lwasm_expr_result_ckconst(asmstate_t *as, lwasm_expr_stack_t *s)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
305 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
306 lwasm_expr_stack_node_t *n;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
307 lwasm_symbol_ent_t *se;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
308
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
309 if (as -> outformat != OUTPUT_OBJ)
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
310 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
311 if (lwasm_expr_is_constant(s))
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
312 return 1;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
313 else
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
314 return 0;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
315 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
316
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
317 for (n = s -> head; n; n = n -> next)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
318 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
319 if (n -> term -> term_type == LWASM_TERM_SYM)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
320 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
321 se = lwasm_find_symbol(as, n -> term -> symbol, as -> context);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
322 if (!se)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
323 se = lwasm_find_symbol(as, n -> term -> symbol, -1);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
324 if (!se)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
325 return 0;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
326 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
327 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
328 return 1;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
329 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
330
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
331 /*
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
332 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
333 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
334
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
335 */
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
336 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
337 {
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
338 lwasm_expr_stack_t *s = NULL;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
339 const char *ep;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
340 int rval;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
341
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
342 if ((as -> passnum == 1 && !(flag & EXPR_REEVAL)) || slot < 0)
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
343 {
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
344 s = lwasm_evaluate_expr(as, l, *inp, &ep, flag);
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
345 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
346 l -> exprs[slot] = s;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
347 if (!s)
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
348 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
349 register_error(as, l, 1, "Bad expression");
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
350 *val = 0;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
351 return -1;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
352 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
353 *inp = (char *)ep;
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
354 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
355 {
94
83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't
lost
parents: 93
diff changeset
356 l -> exprends[slot] = (char *)ep;
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
357 l -> exprvals[slot] = lwasm_expr_get_value(s);
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
358 }
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
359 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
360 else if (l -> exprs[slot])
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
361 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
362 s = l -> exprs[slot];
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
363 lwasm_reevaluate_expr(as, l, s, flag);
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
364 l -> exprvals[slot] = lwasm_expr_get_value(s);
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
365 }
84
e12edcfbebd5 Fixed problem with expression evaluation infrastructure not advancing input pointer on pass 2
lost
parents: 79
diff changeset
366 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
367 *inp = l -> exprends[slot];
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
368
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
369 if (s && lwasm_expr_is_constant(s))
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
370 {
94
83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't
lost
parents: 93
diff changeset
371 *val = lwasm_expr_get_value(s);
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
372 lwasm_expr_stack_free(s);
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
373 l -> exprs[slot] = NULL;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
374 s = NULL;
94
83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't
lost
parents: 93
diff changeset
375 return 0;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
376 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
377
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
378 if (!s && slot >= 0)
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
379 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
380 *val = l -> exprvals[slot];
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
381 return 0;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
382 }
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
383 else if (!s)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
384 {
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
385 *val = 0;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
386 return 0;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
387 }
78
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
388
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
389 // was a constant result on pass 1 requested?
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
390 // that means we must have a constant on either pass
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
391 if (flag & EXPR_PASS1CONST)
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
392 {
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
393 *val = 0;
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
394 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
395 l -> exprvals[slot] = 0;
78
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
396 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
397 lwasm_expr_stack_free(s);
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
398 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
399 l -> exprs[slot] = NULL;
78
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
400 return -1;
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
401 }
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
402
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
403 return 1;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
404 }
55
8e32696380f3 added expression evaluation and checking function
lost
parents: 52
diff changeset
405
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
406 void debug_message(int level, const char *fmt, ...)
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
407 {
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
408 va_list args;
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
409
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
410 va_start(args, fmt);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
411 if (debug_level >= level)
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
412 {
39
efa19ec69df9 tweaked debugging system for expression handler
lost
parents: 38
diff changeset
413 if (level > 0)
efa19ec69df9 tweaked debugging system for expression handler
lost
parents: 38
diff changeset
414 fprintf(stderr, "DEBUG %d: ", level);
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
415 vfprintf(stderr, fmt, args);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
416 fputc('\n', stderr);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
417 }
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
418 va_end(args);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
419 }
57
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
420
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
421 int lwasm_next_context(asmstate_t *as)
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
422 {
58
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
423 int r;
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
424 r = as -> nextcontext;
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
425 as -> nextcontext += 1;
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
426 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
427 return r;
57
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
428 }
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
429