mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-08-31 01:50:15 +02:00
166 lines
4.9 KiB
C++
166 lines
4.9 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Kipp E.B. Hickman.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "leaky.h"
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#ifdef USE_ELF
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#include "leaky.h"
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#include <stdio.h>
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#include <malloc.h>
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#include <libelf/libelf.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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void leaky::readSymbols(const char *fileName)
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{
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int fd = ::open(fileName, O_RDONLY);
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if (fd < 0) {
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fprintf(stderr, "%s: unable to open \"%s\"\n", applicationName,
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fileName);
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exit(-1);
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}
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elf_version(EV_CURRENT);
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Elf *elf = elf_begin(fd, ELF_C_READ, 0);
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if (!elf) {
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fprintf(stderr, "%s: \"%s\": has no symbol table\n", applicationName,
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fileName);
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exit(-1);
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}
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long alloced = 10000;
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Symbol* syms = (Symbol*) malloc(sizeof(Symbol) * 10000);
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Symbol* sp = syms;
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Symbol* last = syms + alloced;
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// Get each of the relevant sections and add them to the list of
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// symbols.
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Elf32_Ehdr *ehdr = elf32_getehdr(elf);
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if (!ehdr) {
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fprintf(stderr, "%s: elf library lossage\n", applicationName);
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exit(-1);
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}
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#if 0
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Elf32_Half ndx = ehdr->e_shstrndx;
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#endif
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Elf_Scn *scn = 0;
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int strtabndx = -1;
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for (int i = 1; (scn = elf_nextscn(elf, scn)) != 0; i++) {
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Elf32_Shdr *shdr = elf32_getshdr(scn);
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#if 0
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char *name = elf_strptr(elf, ndx, (size_t) shdr->sh_name);
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printf("Section %s (%d 0x%x)\n", name ? name : "(null)",
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shdr->sh_type, shdr->sh_type);
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#endif
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if (shdr->sh_type == SHT_STRTAB) {
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/* We assume here that string tables preceed symbol tables... */
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strtabndx = i;
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continue;
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}
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#if 0
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if (shdr->sh_type == SHT_DYNAMIC) {
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/* Dynamic */
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Elf_Data *data = elf_getdata(scn, 0);
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if (!data || !data->d_size) {
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printf("No data...");
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continue;
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}
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Elf32_Dyn *dyn = (Elf32_Dyn*) data->d_buf;
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Elf32_Dyn *lastdyn =
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(Elf32_Dyn*) ((char*) data->d_buf + data->d_size);
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for (; dyn < lastdyn; dyn++) {
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printf("tag=%d value=0x%x\n", dyn->d_tag, dyn->d_un.d_val);
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}
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} else
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#endif
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if ((shdr->sh_type == SHT_SYMTAB) ||
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(shdr->sh_type == SHT_DYNSYM)) {
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/* Symbol table */
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Elf_Data *data = elf_getdata(scn, 0);
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if (!data || !data->d_size) {
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printf("No data...");
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continue;
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}
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/* In theory we now have the symbols... */
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Elf32_Sym *esym = (Elf32_Sym*) data->d_buf;
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Elf32_Sym *lastsym =
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(Elf32_Sym*) ((char*) data->d_buf + data->d_size);
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for (; esym < lastsym; esym++) {
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#if 0
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char *nm = elf_strptr(elf, strtabndx, (size_t)esym->st_name);
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printf("%20s 0x%08x %02x %02x\n",
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nm, esym->st_value, ELF32_ST_BIND(esym->st_info),
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ELF32_ST_TYPE(esym->st_info));
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#endif
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if ((esym->st_value == 0) ||
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(ELF32_ST_BIND(esym->st_info) == STB_WEAK) ||
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(ELF32_ST_BIND(esym->st_info) == STB_NUM) ||
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(ELF32_ST_TYPE(esym->st_info) != STT_FUNC)) {
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continue;
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}
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#if 1
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char *nm = elf_strptr(elf, strtabndx, (size_t)esym->st_name);
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#endif
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sp->name = nm ? strdup(nm) : "(no name)";
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sp->address = esym->st_value;
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sp++;
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if (sp >= last) {
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long n = alloced + 10000;
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syms = (Symbol*)
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realloc(syms, (size_t) (sizeof(Symbol) * n));
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last = syms + n;
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sp = syms + alloced;
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alloced = n;
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}
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}
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}
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}
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int interesting = sp - syms;
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if (!quiet) {
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printf("Total of %d symbols\n", interesting);
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}
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usefulSymbols = interesting;
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externalSymbols = syms;
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}
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#endif /* USE_ELF */
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