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comparison ticoff/tables.c @ 71:c15cd3d695c0

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tiobjd: successful parsing of the section header table
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sat, 22 Mar 2014 05:53:02 +0000
parents
children 10f3fbff5e97
comparison
equal deleted inserted replaced
70:6799a5c57a49 71:c15cd3d695c0
1 /*
2 * This C module will contain functions for the initial parsing
3 * of the section and symbol tables.
4 */
5
6 #include <sys/types.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <strings.h>
11 #include "filestruct.h"
12 #include "intstruct.h"
13 #include "globals.h"
14
15 extern unsigned get_u16(), get_u32();
16
17 static char *
18 get_secorsym_name(ptr)
19 u_char *ptr;
20 {
21 char *alloc;
22
23 if (ptr[0]) {
24 if (ptr[7]) {
25 alloc = malloc(9);
26 if (!alloc) {
27 perror("malloc");
28 exit(1);
29 }
30 bcopy(ptr, alloc, 8);
31 alloc[8] = '\0';
32 return(alloc);
33 } else
34 return((char *) ptr);
35 }
36 if (ptr[1] || ptr[2] || ptr[3]) {
37 fprintf(stderr, "error: malformed name in %s at offset 0x%x\n",
38 objfilename, ptr - filemap);
39 exit(1);
40 }
41 return(filemap + strtab_offset + get_u32(ptr+4));
42 }
43
44 get_int_section_table()
45 {
46 unsigned n;
47
48 sections = malloc(sizeof(struct internal_scnhdr) * nsections);
49 if (!sections) {
50 perror("malloc");
51 exit(1);
52 }
53 for (n = 0; n < nsections; n++) {
54 sections[n].name = get_secorsym_name(sections_raw[n].s_name);
55 if (get_u32(sections_raw[n].s_paddr))
56 fprintf(stderr,
57 "warning: section #%u (%s) has nonzero paddr\n",
58 n, sections[n].name);
59 if (get_u32(sections_raw[n].s_vaddr))
60 fprintf(stderr,
61 "warning: section #%u (%s) has nonzero vaddr\n",
62 n, sections[n].name);
63 sections[n].size = get_u32(sections_raw[n].s_size);
64 sections[n].data_offset = get_u32(sections_raw[n].s_scnptr);
65 sections[n].reloc_offset = get_u32(sections_raw[n].s_relptr);
66 sections[n].line_offset = get_u32(sections_raw[n].s_lnnoptr);
67 sections[n].nreloc = get_u32(sections_raw[n].s_nreloc);
68 sections[n].nlineent = get_u32(sections_raw[n].s_nlnno);
69 sections[n].flags = get_u32(sections_raw[n].s_flags);
70 if (get_u16(sections_raw[n].s_reserved))
71 fprintf(stderr,
72 "warning: section #%u (%s): some nonzero value in s_reserved bytes\n",
73 n, sections[n].name);
74 if (get_u16(sections_raw[n].s_page))
75 fprintf(stderr,
76 "warning: section #%u (%s): some nonzero value in s_page bytes\n",
77 n, sections[n].name);
78 }
79 }
80
81 cmd_sechdr()
82 {
83 unsigned n;
84 struct internal_scnhdr *inf;
85
86 get_int_section_table();
87 for (n = 0; n < nsections; n++) {
88 inf = sections + n;
89 printf("#%d: %s size=%u, flags=0x%x\n", n, inf->name,
90 inf->size, inf->flags);
91 printf("\t%u reloc, %u line entries\n",
92 inf->nreloc, inf->nlineent);
93 }
94 exit(0);
95 }