1 /*-
2 * Copyright 1996-1998 John D. Polstra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28 /*
29 * Support for printing debugging messages.
30 */
31
32 #include <stdarg.h>
33 #include <stdio.h>
34
35 #include "debug.h"
36 #include "rtld.h"
37 #include "rtld_printf.h"
38
39 static const char rel_header[] =
40 " symbol name r_info r_offset st_value st_size address value\n"
41 " ------------------------------------------------------------------------------\n";
42 static const char rel_format[] = " %-25s %6lx %08lx %08lx %7d %10p %08lx\n";
43
44 int debug = 0;
45
46 void
debug_printf(const char * format,...)47 debug_printf(const char *format, ...)
48 {
49 if (debug) {
50 va_list ap;
51 va_start(ap, format);
52
53 rtld_vfdprintf(STDERR_FILENO, format, ap);
54 rtld_fdputchar(STDERR_FILENO, '\n');
55
56 va_end(ap);
57 }
58 }
59
60 void
dump_relocations(Obj_Entry * obj0)61 dump_relocations (Obj_Entry *obj0)
62 {
63 Obj_Entry *obj;
64
65 for (obj = obj0; obj != NULL; obj = obj->next) {
66 dump_obj_relocations(obj);
67 }
68 }
69
70 void
dump_obj_relocations(Obj_Entry * obj)71 dump_obj_relocations (Obj_Entry *obj)
72 {
73
74 rtld_printf("Object \"%s\", relocbase %p\n", obj->path, obj->relocbase);
75
76 if (obj->relsize) {
77 rtld_printf("Non-PLT Relocations: %ld\n",
78 (obj->relsize / sizeof(Elf_Rel)));
79 dump_Elf_Rel(obj, obj->rel, obj->relsize);
80 }
81
82 if (obj->relasize) {
83 rtld_printf("Non-PLT Relocations with Addend: %ld\n",
84 (obj->relasize / sizeof(Elf_Rela)));
85 dump_Elf_Rela(obj, obj->rela, obj->relasize);
86 }
87
88 if (obj->pltrelsize) {
89 rtld_printf("PLT Relocations: %ld\n",
90 (obj->pltrelsize / sizeof(Elf_Rel)));
91 dump_Elf_Rel(obj, obj->pltrel, obj->pltrelsize);
92 }
93
94 if (obj->pltrelasize) {
95 rtld_printf("PLT Relocations with Addend: %ld\n",
96 (obj->pltrelasize / sizeof(Elf_Rela)));
97 dump_Elf_Rela(obj, obj->pltrela, obj->pltrelasize);
98 }
99 }
100
101 void
dump_Elf_Rel(Obj_Entry * obj,const Elf_Rel * rel0,u_long relsize)102 dump_Elf_Rel (Obj_Entry *obj, const Elf_Rel *rel0, u_long relsize)
103 {
104 const Elf_Rel *rel;
105 const Elf_Rel *rellim;
106 const Elf_Sym *sym;
107 Elf_Addr *dstaddr;
108
109 rtld_putstr(rel_header);
110 rellim = (const Elf_Rel *)((const char *)rel0 + relsize);
111 for (rel = rel0; rel < rellim; rel++) {
112 dstaddr = (Elf_Addr *)(obj->relocbase + rel->r_offset);
113 sym = obj->symtab + ELF_R_SYM(rel->r_info);
114 rtld_printf(rel_format,
115 obj->strtab + sym->st_name,
116 (u_long)rel->r_info, (u_long)rel->r_offset,
117 (u_long)sym->st_value, (int)sym->st_size,
118 dstaddr, (u_long)*dstaddr);
119 }
120 return;
121 }
122
123 void
dump_Elf_Rela(Obj_Entry * obj,const Elf_Rela * rela0,u_long relasize)124 dump_Elf_Rela (Obj_Entry *obj, const Elf_Rela *rela0, u_long relasize)
125 {
126 const Elf_Rela *rela;
127 const Elf_Rela *relalim;
128 const Elf_Sym *sym;
129 Elf_Addr *dstaddr;
130
131 rtld_putstr(rel_header);
132 relalim = (const Elf_Rela *)((const char *)rela0 + relasize);
133 for (rela = rela0; rela < relalim; rela++) {
134 dstaddr = (Elf_Addr *)(obj->relocbase + rela->r_offset);
135 sym = obj->symtab + ELF_R_SYM(rela->r_info);
136 rtld_printf(rel_format,
137 obj->strtab + sym->st_name,
138 (u_long)rela->r_info, (u_long)rela->r_offset,
139 (u_long)sym->st_value, (int)sym->st_size,
140 dstaddr, (u_long)*dstaddr);
141 }
142 return;
143 }
144