Note: This article is nothing about build a cross-compiler toolchains. The only reason I need to rebuild the glibc is for hacking the glibc itself, which mean to providing a debugging platform. If you need to build a cross-compiler toolchains( for Play Station III?) , go to openWRT community.
1, download the glibc-2.14.1.
2, Preparation before compiling:
root@sl13:/home/libs/2.14-build# mkdir -p /home/root_shawn/etc
root@sl13:/home/libs/2.14-build# cp /etc/ld.so.conf /home/root_shawn/etc/
3, Decompressing the source code and compiling:
root@sl13:/home/libs# tar jxvf glibc-2.14.1.tar.bz2
root@sl13:/home/libs/2.14-build# ../glibc-2.14.1/configure --prefix=/home/root_shawn --with-tls --enable-add-ons=nptl
root@sl13:/home/libs/2.14-build# make -j 2 && make install
4, Edit some config files:
add "export LIBRARY_PATH=/home/root_shawn/lib:/lib:/usr/lib" to the file /etc/profile
edit the file "/usr/lib/gcc/i486-slackware-linux/4.5.2/specs", and replace "/lib/ld-linux.so.2" with "/home/root_shawn/lib/ld-linux.so.2"
add "/home/root_shawn/lib" to the file /etc/ld.so.conf
root@sl13:/home/libs/2.14-build# source /etc/profile
5, Testing the current version of glibc
int main ()
printf("%s\n", gnu_get_libc_version ());
root@sl13:~# gcc hello.c
Bingo, it's already upgrade!
6, Check the linking path
root@sl13:~# readelf -l a.out
Elf file type is EXEC (Executable file)
Entry point 0x8048340
There are 7 program headers, starting at offset 52
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
PHDR 0x000034 0x08048034 0x08048034 0x000e0 0x000e0 R E 0x4
INTERP 0x000114 0x08048114 0x08048114 0x00023 0x00023 R 0x1
[Requesting program interpreter: /home/root_shawn/lib/ld-linux.so.2]
LOAD 0x000000 0x08048000 0x08048000 0x00504 0x00504 R E 0x1000
LOAD 0x000504 0x08049504 0x08049504 0x00104 0x0010c RW 0x1000
DYNAMIC 0x000518 0x08049518 0x08049518 0x000c8 0x000c8 RW 0x4
NOTE 0x000138 0x08048138 0x08048138 0x00020 0x00020 R 0x4
GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x4
Section to Segment mapping:
02 .interp .note.ABI-tag .hash .dynsym .dynstr .gnu.version .gnu.version_r .rel.dyn .rel.plt .init .plt .text .fini .rodata .eh_frame
03 .ctors .dtors .jcr .dynamic .got .got.plt .data .bss
[Requesting program interpreter: /home/root_shawn/lib/ld-linux.so.2] --- that's what I want. Shit~ I can debug the fucking glibc now. I'll keep reading the Phrack paper( avoid the stack canary to remote exploit for profit and fun? ) this week. 29% is too far away from my goal/gold.....hmm...maybe emacs's lines counter has some problem @_@
btw: The Architecture wants the Matrix running by the paradigms of closed system/linear/mechanic/engineering/controlled. The Oracle wants the Matrix becoming a diversity world with infinitely possibility, by following the paradigms of open system/non-linear/biological/evolving/out of control. The matters is depend on your "choice".
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