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/* Chrysalide - Outil d'analyse de fichiers binaires
* header.c - annotation des en-têtes de programme de binaires ELF
*
* Copyright (C) 2015 Cyrille Bagard
*
* This file is part of Chrysalide.
*
* OpenIDA 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.
*
* OpenIDA 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 "program.h"
#include <i18n.h>
#include <arch/raw.h>
#include <common/extstr.h>
#include <format/symbol.h>
#include <format/elf/elf-int.h>
/* Charge tous les symboles liés à un en-tête de programme ELF. */
static bool annotate_elf_program_header(GElfFormat *, SourceEndian, vmpa2t *);
/******************************************************************************
* *
* Paramètres : format = description de l'exécutable à compléter. *
* endian = boutisme présentement utilisé. *
* pos = tête de lecture à déplacer. [OUT] *
* *
* Description : Charge tous les symboles liés à un en-tête de programme ELF. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
static bool annotate_elf_program_header(GElfFormat *format, SourceEndian endian, vmpa2t *pos)
{
elf_phdr phdr; /* En-tête de programme ELF */
GBinContent *content; /* Contenu binaire à lire */
ImmOperandDisplay disp; /* Afficahge de valeur */
const char *text; /* Texte constant à insérer */
vmpa2t start; /* Localisation des symboles */
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_program_header(format, get_phy_addr(pos), &phdr))
return false;
content = g_binary_format_get_content(G_BIN_FORMAT(format));
/* Champ "p_type" */
disp = IOD_DEC;
switch (ELF_PHDR(format, phdr, p_type))
{
case PT_NULL:
text = _("Segment type: unused");
break;
case PT_LOAD:
text = _("Segment type: loadable program segment");
break;
case PT_DYNAMIC:
text = _("Segment type: dynamic linking information");
break;
case PT_INTERP:
text = _("Segment type: program interpreter");
break;
case PT_NOTE:
text = _("Segment type: auxiliary information");
break;
case PT_SHLIB:
text = _("Segment type: reserved");
break;
case PT_PHDR:
text = _("Segment type: entry for header table itself");
break;
case PT_TLS:
text = _("Segment type: thread-local storage segment");
break;
case PT_LOOS ... PT_HIOS:
disp = IOD_HEX;
switch (ELF_PHDR(format, phdr, p_type))
{
case PT_GNU_EH_FRAME:
text = _("Segment type: GCC .eh_frame_hdr segment");
break;
case PT_GNU_STACK:
text = _("Segment type: indicates stack executability");
break;
case PT_GNU_RELRO:
text = _("Segment type: read-only after relocation");
break;
case PT_LOSUNW ... PT_HISUNW:
switch (ELF_PHDR(format, phdr, p_type))
{
case PT_SUNWSTACK:
text = _("Segment type: Sun Stack segment");
break;
default:
text = _("Segment type: Sun specific segment");
break;
}
break;
default:
text = _("Segment type: OS-specific");
break;
}
break;
case PT_LOPROC ... PT_HIPROC:
disp = IOD_HEX;
text = _("Segment type: processor-specific");
break;
default:
disp = IOD_HEX;
text = _("Segment type: unknown");
break;
}
copy_vmpa(&start, pos);
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, pos, instr, comment, text);
if (format->is_32b)
{
/* Champ "p_offset" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment file offset"));
/* Champ "p_vaddr" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment virtual address"));
/* Champ "p_paddr" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment physical address"));
/* Champ "p_filesz" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment size in file"));
/* Champ "p_memsz" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment size in memory"));
/* Champ "p_flags" */
dtext = strdup(_("Segment flags: "));
filled = false;
if (ELF_PHDR(format, phdr, p_flags) & PF_R)
{
dtext = stradd(dtext, "R");
filled = true;
}
if (ELF_PHDR(format, phdr, p_flags) & PF_W)
{
dtext = stradd(dtext, "W");
filled = true;
}
if (ELF_PHDR(format, phdr, p_flags) & PF_X)
{
dtext = stradd(dtext, "X");
filled = true;
}
if (ELF_PHDR(format, phdr, p_flags) & PF_MASKOS)
/* TODO */;
if (ELF_PHDR(format, phdr, p_flags) & PF_MASKPROC)
/* TODO */;
if (!filled)
dtext = stradd(dtext, _("none"));
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, dtext);
free(dtext);
/* Champ "p_align" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment alignment"));
}
else
{
/* Champ "p_flags" */
dtext = strdup(_("Segment flags: "));
filled = false;
if (ELF_PHDR(format, phdr, p_flags) & PF_R)
{
dtext = stradd(dtext, "R");
filled = true;
}
if (ELF_PHDR(format, phdr, p_flags) & PF_W)
{
dtext = stradd(dtext, "W");
filled = true;
}
if (ELF_PHDR(format, phdr, p_flags) & PF_X)
{
dtext = stradd(dtext, "X");
filled = true;
}
if (ELF_PHDR(format, phdr, p_flags) & PF_MASKOS)
/* TODO */;
if (ELF_PHDR(format, phdr, p_flags) & PF_MASKPROC)
/* TODO */;
if (!filled)
dtext = stradd(dtext, _("none"));
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_32_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, dtext);
free(dtext);
/* Champ "p_offset" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment file offset"));
/* Champ "p_vaddr" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment virtual address"));
/* Champ "p_paddr" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment physical address"));
/* Champ "p_filesz" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment size in file"));
/* Champ "p_memsz" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment size in memory"));
/* Champ "p_align" */
copy_vmpa(&start, pos);
instr = g_raw_instruction_new_array(content, MDS_64_BITS, 1, pos, endian);
ADD_RAW_AS_SYM(format, symbol, pos, instr, comment, _("Segment alignment"));
}
g_object_unref(G_OBJECT(content));
return true;
}
/******************************************************************************
* *
* Paramètres : format = description de l'exécutable à compléter. *
* *
* Description : Charge tous les symboles liés aux en-têtes de programme ELF. *
* *
* Retour : Bilan de l'opération. *
* *
* Remarques : - *
* *
******************************************************************************/
bool annotate_elf_program_header_table(GElfFormat *format)
{
bool result; /* Bilan à retourner */
const elf_header *header; /* En-tête principale */
SourceEndian endian; /* Boutisme utilisé */
phys_t offset; /* Tête de lecture du bbinaire */
vmpa2t pos; /* Localisation des symboles */
uint16_t e_phnum; /* Nombre d'éléments 'Program' */
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));
offset = ELF_HDR(format, *header, e_phoff);
if (!g_exe_format_translate_offset_into_vmpa(G_EXE_FORMAT(format), offset, &pos))
return false;
e_phnum = ELF_HDR(format, *header, e_phnum);
for (i = 0; i < e_phnum && result; i++)
result = annotate_elf_program_header(format, endian, &pos);
return true;
}
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