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/*
* HT Editor
* htelfsym.cc
*
* Copyright (C) 1999-2002 Stefan Weyergraf
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "elfstruc.h"
#include "atom.h"
#include "except.h"
#include "htelf.h"
#include "htelfsym.h"
#include "httag.h"
#include "formats.h"
#include "snprintf.h"
#include <stdlib.h>
static int_hash elf_st_bind[] =
{
{ELF_STB_LOCAL, "local"},
{ELF_STB_GLOBAL, "global"},
{ELF_STB_WEAK, "weak"},
{0, 0}
};
static int_hash elf_st_type[] =
{
{ELF_STT_NOTYPE, "no type"},
{ELF_STT_OBJECT, "object"},
{ELF_STT_FUNC, "func"},
{ELF_STT_SECTION, "section"},
{ELF_STT_FILE, "file"},
{ELF_STT_COMMON, "common"},
{0, 0}
};
static ht_view *htelfsymboltable_init(Bounds *b, File *file, ht_format_group *group)
{
ht_elf_shared_data *elf_shared=(ht_elf_shared_data *)group->get_shared_data();
if (elf_shared->ident.e_ident[ELF_EI_CLASS]!=ELFCLASS32) return 0;
uint skip = elf_shared->symtables;
uint symtab_shidx = ELF_SHN_UNDEF;
for (uint i=1; i<elf_shared->sheaders.count; i++) {
if ((elf_shared->sheaders.sheaders32[i].sh_type == ELF_SHT_SYMTAB) || (elf_shared->sheaders.sheaders32[i].sh_type==ELF_SHT_DYNSYM)) {
if (!skip--) {
symtab_shidx = i;
break;
}
}
}
if (!isValidELFSectionIdx(elf_shared, symtab_shidx)) return NULL;
FileOfs h = elf_shared->sheaders.sheaders32[symtab_shidx].sh_offset;
/* associated string table offset (from sh_link) */
FileOfs sto = elf_shared->sheaders.sheaders32[elf_shared->sheaders.sheaders32[symtab_shidx].sh_link].sh_offset;
String symtab_name("?");
if (isValidELFSectionIdx(elf_shared, elf_shared->header32.e_shstrndx)) {
file->seek(elf_shared->sheaders.sheaders32[elf_shared->header32.e_shstrndx].sh_offset
+ elf_shared->sheaders.sheaders32[symtab_shidx].sh_name);
file->readStringz(symtab_name);
}
char desc[128];
ht_snprintf(desc, sizeof desc, DESC_ELF_SYMTAB, &symtab_name, symtab_shidx);
ht_uformat_viewer *v=new ht_uformat_viewer();
v->init(b, desc, VC_EDIT | VC_SEARCH, file, group);
ht_mask_sub *m = new ht_mask_sub();
m->init(file, 0);
registerAtom(ATOM_ELF_ST_BIND, elf_st_bind);
char t[256];
ht_snprintf(t, sizeof t, "* ELF symtab at offset %08qx", h);
m->add_mask(t);
m->add_mask("idx binding type value size section name");
bool elf_bigendian = (elf_shared->ident.e_ident[ELF_EI_DATA] == ELFDATA2MSB);
uint symnum = elf_shared->sheaders.sheaders32[symtab_shidx].sh_size / sizeof (ELF_SYMBOL32);
for (uint i=0; i < symnum; i++) {
ELF_SYMBOL32 sym;
file->seek(h+i*sizeof (ELF_SYMBOL32));
file->readx(&sym, sizeof sym);
createHostStruct(&sym, ELF_SYMBOL32_struct, elf_shared->byte_order);
file->seek(sto+sym.st_name);
char *name = file->fgetstrz();
/* FIXME: error handling (also in elf_analy.cc) */
if (!name) continue;
char *tt = t;
#define tt_end sizeof t - (tt-t)
tt += ht_snprintf(tt, tt_end, "%04x ", i);
const char *bind = matchhash(ELF32_ST_BIND(sym.st_info), elf_st_bind);
if (bind) {
tt += ht_snprintf(tt, tt_end, "%-8s ", bind);
} else {
tt += ht_snprintf(tt, tt_end, "? (%d) ", ELF32_ST_BIND(sym.st_info));
}
const char *type = matchhash(ELF32_ST_TYPE(sym.st_info), elf_st_type);
if (type) {
tt += ht_snprintf(tt, tt_end, "%-8s ", type);
} else {
tt += ht_snprintf(tt, tt_end, "? (%d) ", ELF32_ST_TYPE(sym.st_info));
}
FileOfs so = elf_shared->sheaders.sheaders32[elf_shared->header32.e_shstrndx].sh_offset;
tt = tag_make_edit_dword(tt, tt_end, h+i*sizeof (ELF_SYMBOL32)+4, elf_bigendian ? tag_endian_big : tag_endian_little);
tt += ht_snprintf(tt, tt_end, " ");
tt = tag_make_edit_dword(tt, tt_end, h+i*sizeof (ELF_SYMBOL32)+8, elf_bigendian ? tag_endian_big : tag_endian_little);
tt += ht_snprintf(tt, tt_end, " ");
switch (sym.st_shndx) {
case ELF_SHN_UNDEF:
tt += ht_snprintf(tt, tt_end, "*undefined ");
break;
case ELF_SHN_ABS:
tt += ht_snprintf(tt, tt_end, "*absolute ");
break;
case ELF_SHN_COMMON:
tt += ht_snprintf(tt, tt_end, "*common ");
break;
default: {
String s("?");
if (isValidELFSectionIdx(elf_shared, sym.st_shndx)) {
file->readStringz(s);
}
tt += ht_snprintf(tt, tt_end, "%-11y ", &s);
break;
}
}
tt += ht_snprintf(tt, tt_end, "%s", name);
free(name);
m->add_mask(t);
}
v->insertsub(m);
return v;
}
format_viewer_if htelfsymboltable_if = {
htelfsymboltable_init,
0
};
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