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|
/* Chrysalide - Outil d'analyse de fichiers binaires
* header.c - annotation des en-têtes de section de binaires ELF
*
* Copyright (C) 2015-2017 Cyrille Bagard
*
* This file is part of Chrysalide.
*
* Chrysalide is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Chrysalide 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#include "section.h"
#include <i18n.h>
#include <arch/raw.h>
#include <common/extstr.h>
#include <format/symbol.h>
#include <format/elf/elf-int.h>
#include <format/elf/section.h>
/* Charge tous les symboles liés à un en-tête de section ELF. */
static bool annotate_elf_section_header(GElfFormat *, SourceEndian, const elf_shdr *, vmpa2t *);
/******************************************************************************
* *
* Paramètres : format = description de l'exécutable à compléter. *
* endian = boutisme présentement utilisé. *
* strings = section renvoyant vers des chaînes de caractères. *
* pos = tête de lecture à déplacer. [OUT] *
* *
* Description : Charge tous les symboles liés à un en-tête de section ELF. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
static bool annotate_elf_section_header(GElfFormat *format, SourceEndian endian, const elf_shdr *strings, vmpa2t *pos)
{
elf_shdr shdr; /* En-tête de programme ELF */
GBinContent *content; /* Contenu binaire à lire */
const char *secname; /* Nom d'une section analysée */
ImmOperandDisplay disp; /* Afficahge de valeur */
const char *text; /* Texte constant à insérer */
GArchInstruction *instr; /* Instruction décodée */
GArchOperand *operand; /* Opérande à venir modifier */
GDbComment *comment; /* Définition de commentaire */
GBinSymbol *symbol; /* Symbole à intégrer */
char *dtext; /* Texte dynamique à créer */
bool filled; /* Suivi de mise en place */
if (!read_elf_section_header(format, get_phy_addr(pos), &shdr))
return false;
content = g_binary_format_get_content(G_BIN_FORMAT(format));
/* Champ "sh_name" */
secname = extract_name_from_elf_string_section(format, strings,
ELF_SHDR(format, shdr, sh_name));
if (secname == NULL)
dtext = strdup(_("Section name: <invalid>"));
else
{
dtext = strdup(_("Section name: '"));
dtext = stradd(dtext, secname);
dtext = stradd(dtext, "'");
}
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
SET_IMM_DISPLAY(instr, operand, 0, IOD_DEC);
ADD_RAW_AS_SYM(format, symbol, instr, comment, dtext);
free(dtext);
/* Champ "sh_type" */
disp = IOD_DEC;
switch (ELF_SHDR(format, shdr, sh_type))
{
case SHT_NULL:
text = _("Section type: unused");
break;
case SHT_PROGBITS:
text = _("Section type: program data");
break;
case SHT_SYMTAB:
text = _("Section type: symbol table");
break;
case SHT_STRTAB:
text = _("Section type: string table");
break;
case SHT_RELA:
text = _("Section type: relocation entries with addends");
break;
case SHT_HASH:
text = _("Section type: symbol hash table");
break;
case SHT_DYNAMIC:
text = _("Section type: dynamic linking information");
break;
case SHT_NOTE:
text = _("Section type: notes");
break;
case SHT_NOBITS:
text = _("Section type: program space with no data (bss)");
break;
case SHT_REL:
text = _("Section type: relocation entries, no addends");
break;
case SHT_SHLIB:
text = _("Section type: reserved");
break;
case SHT_DYNSYM:
text = _("Section type: dynamic linker symbol table");
break;
case SHT_INIT_ARRAY:
text = _("Section type: array of constructors");
break;
case SHT_FINI_ARRAY:
text = _("Section type: array of destructors");
break;
case SHT_PREINIT_ARRAY:
text = _("Section type: array of pre-constructors");
break;
case SHT_GROUP:
text = _("Section type: section group");
break;
case SHT_SYMTAB_SHNDX:
text = _("Section type: extended section indeces");
break;
case SHT_LOOS ... SHT_HIOS:
disp = IOD_HEX;
switch (ELF_SHDR(format, shdr, sh_type))
{
case SHT_GNU_ATTRIBUTES:
text = _("Section type: object attributes");
break;
case SHT_GNU_HASH:
text = _("Section type: GNU-style hash table");
break;
case SHT_GNU_LIBLIST:
text = _("Section type: prelink library list");
break;
case SHT_CHECKSUM:
text = _("Section type: checksum for DSO content");
break;
case SHT_LOSUNW ... SHT_HISUNW:
switch (ELF_SHDR(format, shdr, sh_type))
{
case SHT_SUNW_move:
text = _("Section type: SHT_SUNW_move");
break;
case SHT_SUNW_COMDAT:
text = _("Section type: SHT_SUNW_COMDAT");
break;
case SHT_SUNW_syminfo:
text = _("Section type: SHT_SUNW_syminfo");
break;
case SHT_GNU_verdef:
text = _("Section type: version definition section");
break;
case SHT_GNU_verneed:
text = _("Section type: version needs section");
break;
case SHT_GNU_versym:
text = _("Section type: version symbol table");
break;
default:
text = _("Section type: Sun-specific");
break;
}
break;
default:
text = _("Section type: OS-specific");
break;
}
break;
case SHT_LOPROC ... SHT_HIPROC:
disp = IOD_HEX;
text = _("Section type: processor-specific");
break;
case SHT_LOUSER ... SHT_HIUSER:
disp = IOD_HEX;
text = _("Section type: application-specific");
break;
default:
disp = IOD_HEX;
text = _("Section type: unknown");
break;
}
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
SET_IMM_DISPLAY(instr, operand, 0, disp);
ADD_RAW_AS_SYM(format, symbol, instr, comment, text);
/* Champ "sh_flags"... */
dtext = strdup(_("Section flags: "));
filled = false;
if (ELF_SHDR(format, shdr, sh_type) & SHF_WRITE)
{
dtext = stradd(dtext, "W");
filled = true;
}
if (ELF_SHDR(format, shdr, sh_type) & SHF_ALLOC)
{
dtext = stradd(dtext, "A");
filled = true;
}
if (ELF_SHDR(format, shdr, sh_type) & SHF_EXECINSTR)
{
dtext = stradd(dtext, "X");
filled = true;
}
if (ELF_SHDR(format, shdr, sh_type) & SHF_MERGE)
{
dtext = stradd(dtext, "M");
filled = true;
}
if (ELF_SHDR(format, shdr, sh_type) & SHF_LINK_ORDER)
{
dtext = stradd(dtext, "L");
filled = true;
}
if (ELF_SHDR(format, shdr, sh_type) & SHF_TLS)
{
dtext = stradd(dtext, "T");
filled = true;
}
if (!filled)
dtext = stradd(dtext, _("none"));
if (format->is_32b)
{
/* Champ "sh_flags" (suite) */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, dtext);
free(dtext);
/* Champ "sh_addr" */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section virtual addr at execution"));
/* Champ "sh_offset" */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section file offset"));
/* Champ "sh_size" */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
SET_IMM_DISPLAY(instr, operand, 0, IOD_DEC);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section size in bytes"));
}
else
{
/* Champ "sh_flags" (suite) */
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, dtext);
free(dtext);
/* Champ "sh_addr" */
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section virtual addr at execution"));
/* Champ "sh_offset" */
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section file offset"));
/* Champ "sh_size" */
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
SET_IMM_DISPLAY(instr, operand, 0, IOD_DEC);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section size in bytes"));
}
/* Champ "sh_link" */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Link to another section"));
/* Champ "sh_info" */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Additional section information"));
if (format->is_32b)
{
/* Champ "sh_addralign" */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section alignment"));
/* Champ "sh_entsize" */
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
SET_IMM_DISPLAY(instr, operand, 0, IOD_DEC);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Entry size if section holds table"));
}
else
{
/* Champ "sh_addralign" */
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Section alignment"));
/* Champ "sh_entsize" */
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
SET_IMM_DISPLAY(instr, operand, 0, IOD_DEC);
ADD_RAW_AS_SYM(format, symbol, instr, comment, _("Entry size if section holds table"));
}
g_object_unref(G_OBJECT(content));
return true;
}
/******************************************************************************
* *
* Paramètres : format = description de l'exécutable à compléter. *
* status = barre de statut à tenir informée. *
* *
* Description : Charge tous les symboles liés aux en-têtes de section ELF. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool annotate_elf_section_header_table(GElfFormat *format, GtkStatusStack *status)
{
bool result; /* Bilan à retourner */
const elf_header *header; /* En-tête principale */
SourceEndian endian; /* Boutisme utilisé */
elf_shdr strings; /* Section des descriptions */
off_t offset; /* Tête de lecture du binaire */
vmpa2t pos; /* Localisation des symboles */
uint16_t e_shnum; /* Nombre d'éléments 'Program' */
activity_id_t msg; /* Message de progression */
uint16_t i; /* Boucle de parcours */
result = true;
header = g_elf_format_get_header(format);
endian = g_binary_format_get_endianness(G_BIN_FORMAT(format));
if (!find_elf_section_by_index(format, ELF_HDR(format, *header, e_shstrndx), &strings))
return false;
offset = ELF_HDR(format, *header, e_shoff);
init_vmpa(&pos, offset, 0x9900);
e_shnum = ELF_HDR(format, *header, e_shnum);
msg = gtk_status_stack_add_activity(status, _("Writing annotations for all Elf section headers..."), e_shnum);
for (i = 0; i < e_shnum && result; i++)
{
result = annotate_elf_section_header(format, endian, &strings, &pos);
gtk_status_stack_update_activity_value(status, msg, 1);
}
gtk_status_stack_remove_activity(status, msg);
return true;
}
|
