|
364
|
1 /*
|
|
|
2 pass3.c
|
|
|
3
|
|
|
4 Copyright © 2010 William Astle
|
|
|
5
|
|
|
6 This file is part of LWTOOLS.
|
|
|
7
|
|
|
8 LWTOOLS is free software: you can redistribute it and/or modify it under the
|
|
|
9 terms of the GNU General Public License as published by the Free Software
|
|
|
10 Foundation, either version 3 of the License, or (at your option) any later
|
|
|
11 version.
|
|
|
12
|
|
|
13 This program is distributed in the hope that it will be useful, but WITHOUT
|
|
|
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
|
16 more details.
|
|
|
17
|
|
|
18 You should have received a copy of the GNU General Public License along with
|
|
|
19 this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
20 */
|
|
|
21
|
|
|
22 #include <config.h>
|
|
|
23
|
|
|
24 #include <stdio.h>
|
|
|
25 #include <string.h>
|
|
|
26
|
|
|
27 #include <lw_alloc.h>
|
|
|
28 #include <lw_string.h>
|
|
|
29
|
|
|
30 #include "lwasm.h"
|
|
|
31 #include "instab.h"
|
|
|
32
|
|
|
33 /*
|
|
|
34 Resolve1 Pass
|
|
|
35
|
|
|
36 repeatedly resolve instruction sizes and line addresses
|
|
|
37 until nothing more reduces
|
|
|
38
|
|
|
39 */
|
|
|
40 void do_pass3(asmstate_t *as)
|
|
|
41 {
|
|
365
|
42 int rc;
|
|
|
43 line_t *cl;
|
|
|
44 struct line_expr_s *le;
|
|
|
45
|
|
|
46 do
|
|
|
47 {
|
|
|
48 rc = 0;
|
|
|
49 for (cl = as -> line_head; cl; cl = cl -> next)
|
|
|
50 {
|
|
|
51 as -> cl = cl;
|
|
|
52
|
|
|
53 // simplify address
|
|
|
54 lwasm_reduce_expr(as, cl -> addr);
|
|
|
55
|
|
|
56 // simplify each expression
|
|
|
57 for (le = cl -> exprs; le; le = le -> next)
|
|
|
58 lwasm_reduce_expr(as, le -> expr);
|
|
|
59
|
|
|
60 if (cl -> len == -1)
|
|
|
61 {
|
|
|
62 // try resolving the instruction length
|
|
|
63 // but don't force resolution
|
|
|
64 if (cl -> insn >= 0 && instab[cl -> insn].resolve)
|
|
|
65 {
|
|
|
66 (instab[cl -> insn].resolve)(as, cl, 0);
|
|
|
67 if (cl -> len != -1)
|
|
|
68 rc++;
|
|
|
69 }
|
|
|
70 }
|
|
|
71 }
|
|
|
72 if (as -> errorcount > 0)
|
|
|
73 return;
|
|
|
74 } while (rc > 0);
|
|
364
|
75 }
|
