Mercurial > hg-old > index.cgi

annotate lwasm/lwasm.c @ 170:bf69160da467

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added ability to use 0x and 0X as prefixes for hexadecimal numbers
author lost
date Sun, 01 Mar 2009 00:53:21 +0000
parents 427e268e876b
children bae1e3ecdce1
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__
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
25
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
26 #include <stdarg.h>
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
27 #include <stdlib.h>
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
28 #include <stdio.h>
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
29
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
30 #include "lwasm.h"
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
31 #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
32 #include "expr.h"
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
33
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
34 int debug_level = 0;
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
35
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
36 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
37 {
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
38 lwasm_error_t *e;
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
39 va_list args;
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
40 char errbuff[1024];
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
41 int r;
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
42
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
43 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
44 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
45
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
46 if (as -> passnum != pass)
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
47 return;
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
48
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
49 va_start(args, fmt);
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
50
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
51 e = lwasm_alloc(sizeof(lwasm_error_t));
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
52
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
53 e -> next = l -> err;
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
54 l -> err = e;
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
55
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
56 as -> errorcount++;
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
57
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
58 r = vsnprintf(errbuff, 1024, fmt, args);
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
59 e -> mess = lwasm_strdup(errbuff);
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
60
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
61 va_end(args);
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
62
26
d2e86babd958 Added error tracking infrastructure
lost
parents: 13
diff changeset
63 return r;
0
57495da01900 Initial checking of LWASM
lost
parents:
diff changeset
64 }
27
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
65
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
66 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
67 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
68 as -> addr += 1;
58
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
69 as -> addr &= 0xffff;
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
70
74
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
71 if (as -> outformat == OUTPUT_OBJ && !(as -> csect))
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
72 {
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
73 register_error(as, l, 1, "Output not allowed outside sections with obj target");
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
74 return;
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
75 }
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
76 if (as -> outformat == OUTPUT_OBJ && as -> csect -> flags & SECTION_BSS)
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
77 {
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
78 register_error(as, l, 1, "Output not allowed inside BSS sections");
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
79 return;
c8c772ef5df9 Checkpointing object target implementation
lost
parents: 60
diff changeset
80 }
27
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
81 if (as -> passnum == 1)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
82 return;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
83
42
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
84
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
85 if (l -> codelen >= l -> codesize)
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
86 {
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
87 l -> bytes = realloc(l -> bytes, l -> codesize + 16);
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
88 l -> codesize += 16;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
89 }
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
90 l -> bytes[l -> codelen] = b & 0xff;
4bb7b723e5b7 Added pass2 code generation to lwasm_emit()
lost
parents: 39
diff changeset
91 l -> codelen += 1;
27
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
92 }
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 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
95 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
96 if (o >= 0x100)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
97 lwasm_emit(as, l, o >> 8);
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
98 lwasm_emit(as, l, o & 0xff);
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
99 }
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 int lwasm_lookupreg2(const char *reglist, char **str)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
102 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
103 int rval = 0;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
104
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
105 while (*reglist)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
106 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
107 if (toupper(**str) == *reglist)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
108 {
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
109 // first char matches
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
110 if (reglist[1] == ' ' && !isalpha(*(*str + 1)))
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
111 break;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
112 if (toupper(*(*str + 1)) == reglist[1])
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
113 break;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
114 }
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
115 reglist += 2;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
116 rval++;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
117 }
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
118 if (!*reglist)
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
119 return -1;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
120 if (reglist[1] == ' ')
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
121 (*str)++;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
122 else
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
123 (*str) += 2;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
124 return rval;
f736579569b4 Added handlers for inherent and register to register instructions
lost
parents: 26
diff changeset
125 }
32
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
126
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
127 int lwasm_lookupreg3(const char *rlist, const char **str)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
128 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
129 int rval = 0;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
130 int f = 0;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
131 const char *reglist = rlist;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
132
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
133 while (*reglist)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
134 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
135 if (toupper(**str) == *reglist)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
136 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
137 // first char matches
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
138 if (reglist[1] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
139 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
140 f = 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
141 break;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
142 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
143 if (toupper(*(*str + 1)) == reglist[1])
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
144 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
145 // second char matches
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
146 if (reglist[2] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
147 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
148 f = 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
149 break;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
150 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
151 if (toupper(*(*str + 2)) == reglist[2])
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
152 {
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
153 f = 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
154 break;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
155 }
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 reglist += 3;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
159 rval++;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
160 }
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
161 if (f == 0)
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
162 return -1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
163
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
164
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
165 reglist = rval * 3 + rlist;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
166 if (reglist[1] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
167 (*str) += 1;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
168 else if (reglist[2] == ' ')
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
169 (*str) += 2;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
170 else
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
171 (*str)+=3;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
172 return rval;
9bd0fbfe7405 Added basic indexed mode handling
lost
parents: 27
diff changeset
173 }
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
174
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
175 struct symstateinfo
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
176 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
177 asmstate_t *as;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
178 lwasm_line_t *l;
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
179 int flags;
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
180 };
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
181
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
182 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
183 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
184 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
185 struct symstateinfo *st;
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
186 lwasm_expr_stack_t *rs;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
187 lwasm_expr_term_t *t;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
188 lwasm_expr_stack_node_t *n;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
189
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
190 int val;
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
191
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
192 st = state;
52
b9856da2674a Added file inclusion
lost
parents: 42
diff changeset
193 debug_message(3, "lwasm_expr_lookup_symbol(): find '%s' (context=%d)", sym, st -> as -> context);
b9856da2674a Added file inclusion
lost
parents: 42
diff changeset
194
60
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
195 // check for special symbols first...
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
196 if (sym[1] == '\0')
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
197 {
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
198 switch (sym[0])
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
199 {
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
200 // current line address
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
201 case '*':
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
202 case '.':
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
203 val = st -> l -> codeaddr;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
204 goto retconst;
60
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
205
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
206 case '<':
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
207 // previous branch point
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
208 // not implemented
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
209 break;
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
210 case '>':
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
211 // next branch point
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
212 // not implemented
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
213 break;
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
214 }
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
215 }
309810f39ab7 Implemented the * and . special symbols
lost
parents: 58
diff changeset
216
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
217 // 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
218 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
219 if (!se)
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
220 se = lwasm_find_symbol(st -> as, sym, -1);
52
b9856da2674a Added file inclusion
lost
parents: 42
diff changeset
221 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
222 if (!se)
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
223 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
224 register_error(st -> as, st -> l, 2, "Undefined symbol '%s'", sym);
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
225 return NULL;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
226 }
92
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list
lost
parents: 84
diff changeset
227 // 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
228 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
229 {
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list
lost
parents: 84
diff changeset
230 return NULL;
ea2cfebef5d0 Make external symbols remain unresolved in expressions and also flag them in the symbol list
lost
parents: 84
diff changeset
231 }
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
232 if (st -> flags & EXPR_SECTCONST)
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
233 {
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
234 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
235 {
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
236 if (se -> expr)
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
237 goto retsym;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
238 val = se -> value;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
239 goto retconst;
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
240 }
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
241 }
93
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
242 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
243 {
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
244 return NULL;
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
245 }
34ca1c6e9550 Fixed symbol resolution to not resolve intra-section references to constants by default
lost
parents: 92
diff changeset
246 if (st -> as -> outformat != OUTPUT_OBJ || se -> sect == NULL)
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
247 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
248 // global symbol, intrasegment reference, or not an object target
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
249 val = se -> value;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
250 goto retconst;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
251 }
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
252
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
253 // an intersegment reference will return as NULL (to be resolved at output/link time)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
254 // if se -> expr is NULL, it has to be an intersegment reference here
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
255 if (se -> expr == NULL)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
256 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
257 return NULL;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
258 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
259
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
260 retsym:
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
261 // duplicate the expression for return
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
262 rs = lwasm_expr_stack_create();
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
263 for (n = se -> expr -> head; n; n = n -> next)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
264 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
265 lwasm_expr_stack_push(rs, n -> term);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
266 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
267 return rs;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
268
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
269 retconst:
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
270 rs = lwasm_expr_stack_create();
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
271 t = lwasm_expr_term_create_int(val);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
272 lwasm_expr_stack_push(rs, t);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
273 lwasm_expr_term_free(t);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
274 return rs;
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
275 }
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
276
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
277 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
278 {
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
279 struct symstateinfo st;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
280
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
281 st.as = as;
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
282 st.l = l;
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
283 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
284
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
285 debug_message(2, "Evaluate expression: %s", inp);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
286
37
538e15927776 Added symbol handling to expression subsystem; adpated instruction handlers to the new scheme; misc fixes
lost
parents: 32
diff changeset
287 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
288 }
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
289
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
290
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
291 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
292 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
293 struct symstateinfo st;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
294
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
295 st.as = as;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
296 st.l = l;
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
297 st.flags = flags;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
298 return(lwasm_expr_reval(s, lwasm_expr_lookup_symbol, &st));
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
299 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
300
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
301 // return 1 if no undefined symbols (externals and incompletes are okay)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
302 // return 0 if there are undefined symbols
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
303 int lwasm_expr_result_ckconst(asmstate_t *as, lwasm_expr_stack_t *s)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
304 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
305 lwasm_expr_stack_node_t *n;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
306 lwasm_symbol_ent_t *se;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
307
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
308 if (as -> outformat != OUTPUT_OBJ)
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
309 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
310 if (lwasm_expr_is_constant(s))
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
311 return 1;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
312 else
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
313 return 0;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
314 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
315
76
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
316 for (n = s -> head; n; n = n -> next)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
317 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
318 if (n -> term -> term_type == LWASM_TERM_SYM)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
319 {
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
320 se = lwasm_find_symbol(as, n -> term -> symbol, as -> context);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
321 if (!se)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
322 se = lwasm_find_symbol(as, n -> term -> symbol, -1);
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
323 if (!se)
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
324 return 0;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
325 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
326 }
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
327 return 1;
2fe5fd7d65a3 Checkpointing object target implementation
lost
parents: 74
diff changeset
328 }
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 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
332 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
333
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
334 */
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
335 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
336 {
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
337 lwasm_expr_stack_t *s = NULL;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
338 const char *ep;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
339 int rval;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
340
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
341 if ((as -> passnum == 1 && !(flag & EXPR_REEVAL)) || slot < 0)
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
342 {
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
343 s = lwasm_evaluate_expr(as, l, *inp, &ep, flag);
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
344 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
345 l -> exprs[slot] = s;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
346 if (!s)
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
347 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
348 register_error(as, l, 1, "Bad expression");
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
349 *val = 0;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
350 return -1;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
351 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
352 *inp = (char *)ep;
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
353 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
354 {
94
83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't
lost
parents: 93
diff changeset
355 l -> exprends[slot] = (char *)ep;
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
356 l -> exprvals[slot] = lwasm_expr_get_value(s);
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
357 }
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
358 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
359 else if (l -> exprs[slot])
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
360 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
361 s = l -> exprs[slot];
101
f59c0916753d Fixed relative branches and PCR addressing to handle constant intra-section references properly
lost
parents: 98
diff changeset
362 lwasm_reevaluate_expr(as, l, s, flag);
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
363 l -> exprvals[slot] = lwasm_expr_get_value(s);
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
364 }
84
e12edcfbebd5 Fixed problem with expression evaluation infrastructure not advancing input pointer on pass 2
lost
parents: 79
diff changeset
365 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
366 *inp = l -> exprends[slot];
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
367
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
368 if (s && lwasm_expr_is_constant(s))
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
369 {
94
83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't
lost
parents: 93
diff changeset
370 *val = lwasm_expr_get_value(s);
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
371 lwasm_expr_stack_free(s);
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
372 l -> exprs[slot] = NULL;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
373 s = NULL;
94
83ba34ed11b3 Fixed problem with constant expressions evaluating to 0 when they shouldn't
lost
parents: 93
diff changeset
374 return 0;
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
375 }
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
376
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
377 if (!s && slot >= 0)
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
378 {
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
379 *val = l -> exprvals[slot];
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
380 return 0;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
381 }
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
382 else if (!s)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
383 {
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
384 *val = 0;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
385 return 0;
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
386 }
78
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
387
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
388 // was a constant result on pass 1 requested?
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
389 // that means we must have a constant on either pass
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
390 if (flag & EXPR_PASS1CONST)
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
391 {
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
392 *val = 0;
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
393 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
394 l -> exprvals[slot] = 0;
78
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
395 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
396 lwasm_expr_stack_free(s);
79
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
397 if (slot >= 0)
d0ce3f5f6797 Checkpointing deployment of non-constant expression handling
lost
parents: 78
diff changeset
398 l -> exprs[slot] = NULL;
78
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
399 return -1;
121bf4a588ea Checkpointing deployment of non-constant expression handling
lost
parents: 77
diff changeset
400 }
77
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
401
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
402 return 1;
a338d496350e Checkpointing conversion to allow object target
lost
parents: 76
diff changeset
403 }
55
8e32696380f3 added expression evaluation and checking function
lost
parents: 52
diff changeset
404
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
405 void debug_message(int level, const char *fmt, ...)
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
406 {
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
407 va_list args;
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
408
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
409 va_start(args, fmt);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
410 if (debug_level >= level)
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
411 {
39
efa19ec69df9 tweaked debugging system for expression handler
lost
parents: 38
diff changeset
412 if (level > 0)
efa19ec69df9 tweaked debugging system for expression handler
lost
parents: 38
diff changeset
413 fprintf(stderr, "DEBUG %d: ", level);
38
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
414 vfprintf(stderr, fmt, args);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
415 fputc('\n', stderr);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
416 }
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
417 va_end(args);
9bd584bb6296 Added debugging message infrastructure
lost
parents: 37
diff changeset
418 }
57
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
419
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
420 int lwasm_next_context(asmstate_t *as)
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
421 {
58
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
422 int r;
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
423 r = as -> nextcontext;
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
424 as -> nextcontext += 1;
b1d81800bc91 Added symbol listing to list file; various fixes
lost
parents: 57
diff changeset
425 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
426 return r;
57
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
427 }
035b95a3690f Added conditional assembly and macros
lost
parents: 55
diff changeset
428