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pass3.c - scc - simple c99 compiler
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---
pass3.c (1343B)
---
1 #include <ctype.h>
2 #include <stdio.h>
3 #include <stdlib.h>
4
5 #include <scc/mach.h>
6
7 #include "ld.h"
8
9 /* TODO: This function must go in pass2 */
10 static void
11 rebase(Obj *obj)
12 {
13 Symbol *aux;
14 Objsym *sym;
15
16 for (sym = obj->syms; sym; sym = sym->next) {
17 switch (sym->type) {
18 case 'T':
19 case 'D':
20 case 'B':
21 /*
22 * this lookup must succeed, otherwise
23 * we have an error in our code.
24 */
25 aux = lookup(sym->name);
26 aux->value += obj->secs[sym->index].base;
27 case 't':
28 case 'd':
29 case 'b':
30 sym->value += obj->secs[sym->index].base;
31 case 'U':
32 case 'N':
33 case '?':
34 break;
35 default:
36 abort();
37 }
38 }
39 }
40
41 /*
42 * rebase all the sections
43 */
44 void
45 pass3(int argc, char *argv[])
46 {
47 int i;
48 Obj *obj;
49 Section *sec;
50 Segment *seg;
51
52 /*
53 * TODO: deal with page aligment
54 */
55 text.base = 0x100;
56 rodata.base = text.base + text.size;
57 data.base = rodata.base + rodata.size;
58 bss.base = data.base + data.size;
59
60 for (obj = objhead; obj; obj = obj->next) {
61 for (i = 0; getsec(obj, &i, &sec); i++) {
62 /* TODO: deal with symbol aligment */
63 switch (sec->type) {
64 case 'T':
65 seg = &text;
66 break;
67 /* TODO: what happens with rodata? */
68 case 'D':
69 seg = &data;
70 break;
71 case 'B':
72 seg = &bss;
73 break;
74 default:
75 abort();
76 }
77
78 rebase(obj, i, seg->size);
79 seg->size += sec.size;
80 }
81 }
82 }