1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright 1996-1998 John D. Polstra. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 /* 31 * Support for printing debugging messages. 32 */ 33 34 #include <stdarg.h> 35 #include <stdio.h> 36 37 #include "debug.h" 38 #include "rtld.h" 39 #include "rtld_printf.h" 40 41 static const char rel_header[] = 42 " symbol name r_info r_offset st_value st_size address value\n" 43 " ------------------------------------------------------------------------------\n"; 44 static const char rel_format[] = " %-25s %6lx %08lx %08lx %7d %10p %08lx\n"; 45 46 int debug = 0; 47 48 void 49 debug_printf(const char *format, ...) 50 { 51 if (debug) { 52 va_list ap; 53 va_start(ap, format); 54 55 rtld_vfdprintf(STDERR_FILENO, format, ap); 56 rtld_fdputchar(STDERR_FILENO, '\n'); 57 58 va_end(ap); 59 } 60 } 61 62 void 63 dump_relocations (Obj_Entry *obj0) 64 { 65 Obj_Entry *obj; 66 67 for (obj = globallist_curr(obj0); obj != NULL; 68 obj = globallist_next(obj)) { 69 dump_obj_relocations(obj); 70 } 71 } 72 73 void 74 dump_obj_relocations (Obj_Entry *obj) 75 { 76 77 rtld_printf("Object \"%s\", relocbase %p\n", obj->path, obj->relocbase); 78 79 if (obj->relsize) { 80 rtld_printf("Non-PLT Relocations: %ld\n", 81 (obj->relsize / sizeof(Elf_Rel))); 82 dump_Elf_Rel(obj, obj->rel, obj->relsize); 83 } 84 85 if (obj->relasize) { 86 rtld_printf("Non-PLT Relocations with Addend: %ld\n", 87 (obj->relasize / sizeof(Elf_Rela))); 88 dump_Elf_Rela(obj, obj->rela, obj->relasize); 89 } 90 91 if (obj->pltrelsize) { 92 rtld_printf("PLT Relocations: %ld\n", 93 (obj->pltrelsize / sizeof(Elf_Rel))); 94 dump_Elf_Rel(obj, obj->pltrel, obj->pltrelsize); 95 } 96 97 if (obj->pltrelasize) { 98 rtld_printf("PLT Relocations with Addend: %ld\n", 99 (obj->pltrelasize / sizeof(Elf_Rela))); 100 dump_Elf_Rela(obj, obj->pltrela, obj->pltrelasize); 101 } 102 } 103 104 void 105 dump_Elf_Rel (Obj_Entry *obj, const Elf_Rel *rel0, u_long relsize) 106 { 107 const Elf_Rel *rel; 108 const Elf_Rel *rellim; 109 const Elf_Sym *sym; 110 Elf_Addr *dstaddr; 111 112 rtld_putstr(rel_header); 113 rellim = (const Elf_Rel *)((const char *)rel0 + relsize); 114 for (rel = rel0; rel < rellim; rel++) { 115 dstaddr = (Elf_Addr *)(obj->relocbase + rel->r_offset); 116 sym = obj->symtab + ELF_R_SYM(rel->r_info); 117 rtld_printf(rel_format, 118 obj->strtab + sym->st_name, 119 (u_long)rel->r_info, (u_long)rel->r_offset, 120 (u_long)sym->st_value, (int)sym->st_size, 121 dstaddr, (u_long)*dstaddr); 122 } 123 return; 124 } 125 126 void 127 dump_Elf_Rela (Obj_Entry *obj, const Elf_Rela *rela0, u_long relasize) 128 { 129 const Elf_Rela *rela; 130 const Elf_Rela *relalim; 131 const Elf_Sym *sym; 132 Elf_Addr *dstaddr; 133 134 rtld_putstr(rel_header); 135 relalim = (const Elf_Rela *)((const char *)rela0 + relasize); 136 for (rela = rela0; rela < relalim; rela++) { 137 dstaddr = (Elf_Addr *)(obj->relocbase + rela->r_offset); 138 sym = obj->symtab + ELF_R_SYM(rela->r_info); 139 rtld_printf(rel_format, 140 obj->strtab + sym->st_name, 141 (u_long)rela->r_info, (u_long)rela->r_offset, 142 (u_long)sym->st_value, (int)sym->st_size, 143 dstaddr, (u_long)*dstaddr); 144 } 145 return; 146 } 147