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/*
* HT Editor
* htelfsym.cc
*
* Copyright (C) 1999, 2000, 2001 Stefan Weyergraf (stefan@weyergraf.de)
*
* 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 "htatom.h"
#include "htelf.h"
#include "htelfsym.h"
#include "httag.h"
#include "formats.h"
#include <stdlib.h>
int_hash elf_st_bind[] =
{
{ELF_STB_LOCAL, "local"},
{ELF_STB_GLOBAL, "global"},
{ELF_STB_WEAK, "weak"},
{0, 0}
};
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}
};
ht_view *htelfsymboltable_init(bounds *b, ht_streamfile *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 (symtab_shidx==ELF_SHN_UNDEF) return 0;
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;
file->seek(elf_shared->sheaders.sheaders32[elf_shared->header32.e_shstrndx].sh_offset+elf_shared->sheaders.sheaders32[symtab_shidx].sh_name);
char *symtab_name=fgetstrz(file);
char desc[128];
sprintf(desc, DESC_ELF_SYMTAB, symtab_name, symtab_shidx);
free(symtab_name);
ht_uformat_viewer *v=new ht_uformat_viewer();
v->init(b, desc, VC_EDIT, file, group);
ht_mask_sub *m=new ht_mask_sub();
m->init(file, 0);
register_atom(ATOM_ELF_ST_BIND, elf_st_bind);
char t[1024]; /* FIXME: possible buffer overflow ! */
sprintf(t, "* ELF symtab at offset %08x", 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->read(&sym, sizeof sym);
create_host_struct(&sym, ELF_SYMBOL32_struct, elf_shared->byte_order);
file->seek(sto+sym.st_name);
char *name = fgetstrz(file);
/* FIXME: error handling (also in elf_analy.cc) */
if (!name) continue;
char *tt=t;
tt+=sprintf(tt, "%04x ", i);
char *bind=matchhash(ELF32_ST_BIND(sym.st_info), elf_st_bind);
if (bind) {
tt+=sprintf(tt, "%-8s ", bind);
} else {
tt+=sprintf(tt, "? (%d) ", ELF32_ST_BIND(sym.st_info));
}
char *type=matchhash(ELF32_ST_TYPE(sym.st_info), elf_st_type);
if (type) {
tt+=sprintf(tt, "%-8s ", type);
} else {
tt+=sprintf(tt, "? (%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, h+i*sizeof (ELF_SYMBOL32)+4, elf_bigendian ? tag_endian_big : tag_endian_little);
*tt++=' ';
tt=tag_make_edit_dword(tt, h+i*sizeof (ELF_SYMBOL32)+8, elf_bigendian ? tag_endian_big : tag_endian_little);
*tt++=' ';
*tt=0;
switch (sym.st_shndx) {
case ELF_SHN_UNDEF:
tt+=sprintf(tt, "*undefined ");
break;
case ELF_SHN_ABS:
tt+=sprintf(tt, "*absolute ");
break;
case ELF_SHN_COMMON:
tt+=sprintf(tt, "*common ");
break;
default: {
file->seek(so+elf_shared->sheaders.sheaders32[sym.st_shndx].sh_name);
char *s=fgetstrz(file);
tt+=sprintf(tt, "%-11s ", s);
free(s);
break;
}
}
tt+=sprintf(tt, "%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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