warabanshi

import sys, struct
from ctypes import *

libc = cdll.LoadLibrary("libc.so.6")
free = libc.free

mmap = libc.mmap
mmap.restype = c_void_p
munmap = libc.munmap
munmap.argtype = [c_void_p, c_size_t]

warabanshi

pType = {
    'NULL'      : 0,
    'LOAD'      : 1,
    'DYNAMIC'   : 2,
    'INTERP'    : 3,
    'NOTE'      : 4,
    'SHLIB'     : 5,
    'PHDR'      : 6,
    'TLS'       : 7,
    'NUM'       : 8,

warabanshi

/* Set up a mapping from BFD sections to program segments.  */

bfd_boolean
_bfd_elf_map_sections_to_segments (bfd *abfd, struct bfd_link_info *info)
{
  unsigned int count;
  struct elf_segment_map *m;
  asection **sections = NULL;
  const struct elf_backend_data *bed = get_elf_backend_data (abfd);
  bfd_boolean no_user_phdrs;

warabanshi

BITS 64
EXTERN putchar
EXTERN exit
GLOBAL _start

SECTION .text
_start:
    mov     edi, 'T'
    call    putchar
    mov     edi, 42

warabanshi

from Header import Header
from elf.Utils import *

# ELF header
class Eh(Header):

    org = 0x400000

    def getOrg(self):
        return self.org

warabanshi

from elf.Utils import *
from elf.components.headers.Eh import Eh
from elf.components.headers.Sh import Sh
from elf.components.Section import Section
from elf.components.SectionAggregator import SectionAggregator

# teardown ELF file
f = open('test.out')
byteList = map(lambda x: int(ord(x)), f.read())

warabanshi

ELF Header:
  Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
  Class:                             ELF64
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           Advanced Micro Devices X86-64
  Version:                           0x1

warabanshi

segment .data
switch: dq      main.case0
        dq      main.case1
        dq      main.case2
i:      dq      2
        segment .text
        global  main            ; tell linker about main
main:
        mov     rax, [i]        ; move i to rax
        jmp     [switch+rax*8]  ; switch(i)

warabanshi

sum = 0;
i = 0;
while ( i < 64 ) {
    sum += data & 1;
    data = data >> 1;
    i++;
}

warabanshi

        segment .data
data    dq      0xfedcba9876543210
sum     dq      0

        segment .text
        global  main
main:
        push    rbp
        mov     rbp, rsp
        sub     rsp, 16