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https://github.com/freebsd/freebsd-src
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145 lines
4.3 KiB
C
145 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright 1996-1998 John D. Polstra.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Support for printing debugging messages.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include "debug.h"
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#include "rtld.h"
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#include "rtld_printf.h"
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static const char rel_header[] =
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" symbol name r_info r_offset st_value st_size address value\n"
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" ------------------------------------------------------------------------------\n";
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static const char rel_format[] = " %-25s %6lx %08lx %08lx %7d %10p %08lx\n";
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int debug = 0;
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void
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debug_printf(const char *format, ...)
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{
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if (debug) {
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va_list ap;
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va_start(ap, format);
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rtld_vfdprintf(STDERR_FILENO, format, ap);
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rtld_fdputchar(STDERR_FILENO, '\n');
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va_end(ap);
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}
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}
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void
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dump_relocations (Obj_Entry *obj0)
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{
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Obj_Entry *obj;
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for (obj = globallist_curr(obj0); obj != NULL;
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obj = globallist_next(obj)) {
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dump_obj_relocations(obj);
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}
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}
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void
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dump_obj_relocations (Obj_Entry *obj)
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{
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rtld_printf("Object \"%s\", relocbase %p\n", obj->path, obj->relocbase);
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if (obj->relsize) {
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rtld_printf("Non-PLT Relocations: %ld\n",
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(obj->relsize / sizeof(Elf_Rel)));
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dump_Elf_Rel(obj, obj->rel, obj->relsize);
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}
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if (obj->relasize) {
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rtld_printf("Non-PLT Relocations with Addend: %ld\n",
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(obj->relasize / sizeof(Elf_Rela)));
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dump_Elf_Rela(obj, obj->rela, obj->relasize);
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}
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if (obj->pltrelsize) {
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rtld_printf("PLT Relocations: %ld\n",
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(obj->pltrelsize / sizeof(Elf_Rel)));
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dump_Elf_Rel(obj, obj->pltrel, obj->pltrelsize);
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}
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if (obj->pltrelasize) {
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rtld_printf("PLT Relocations with Addend: %ld\n",
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(obj->pltrelasize / sizeof(Elf_Rela)));
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dump_Elf_Rela(obj, obj->pltrela, obj->pltrelasize);
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}
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}
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void
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dump_Elf_Rel (Obj_Entry *obj, const Elf_Rel *rel0, u_long relsize)
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{
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const Elf_Rel *rel;
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const Elf_Rel *rellim;
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const Elf_Sym *sym;
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Elf_Addr *dstaddr;
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rtld_putstr(rel_header);
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rellim = (const Elf_Rel *)((const char *)rel0 + relsize);
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for (rel = rel0; rel < rellim; rel++) {
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dstaddr = (Elf_Addr *)(obj->relocbase + rel->r_offset);
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sym = obj->symtab + ELF_R_SYM(rel->r_info);
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rtld_printf(rel_format,
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obj->strtab + sym->st_name,
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(u_long)rel->r_info, (u_long)rel->r_offset,
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(u_long)sym->st_value, (int)sym->st_size,
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dstaddr, (u_long)*dstaddr);
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}
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return;
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}
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void
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dump_Elf_Rela (Obj_Entry *obj, const Elf_Rela *rela0, u_long relasize)
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{
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const Elf_Rela *rela;
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const Elf_Rela *relalim;
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const Elf_Sym *sym;
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Elf_Addr *dstaddr;
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rtld_putstr(rel_header);
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relalim = (const Elf_Rela *)((const char *)rela0 + relasize);
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for (rela = rela0; rela < relalim; rela++) {
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dstaddr = (Elf_Addr *)(obj->relocbase + rela->r_offset);
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sym = obj->symtab + ELF_R_SYM(rela->r_info);
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rtld_printf(rel_format,
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obj->strtab + sym->st_name,
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(u_long)rela->r_info, (u_long)rela->r_offset,
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(u_long)sym->st_value, (int)sym->st_size,
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dstaddr, (u_long)*dstaddr);
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}
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return;
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}
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