This is the mail archive of the binutils@sourceware.org mailing list for the binutils project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Disabling Consistency Checks


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello all,
  I'm working on a program based on this (
http://mainisusuallyafunction.blogspot.com/2011/01/implementing-breakpoints-on-x86-linux.html
) that will stop a child when a certain function is called.

When trying to implement a hardware break for a separate program (by
using an execv) that is dynamically linked, ld complains with the following:


  Inconsistency detected by ld.so: ../elf/dl-runtime.c: 79: _dl_fixup:
Assertion `((reloc->r_info) & 0xffffffff) == 7' failed!


Now, I'm sure this has to deal with altering another program's code
section and there are obvious reasons why we don't want that to happen;
however, is there a way that I can disable ld's check? Or (perhaps even
better), what would be the correct way of having Program A stop Program
B when a certain line of code is executed that doesn't involve preloading.

I want to avoid preloading, because right now I want to stop whenever a
C program executes a malloc; however, tomorrow I may want to stop at a
printf so I'm trying to make things as dynamic as possible.

If there is any other information that I can provide, please let me know.

Thanks,
Eric

Helpful information:
uname -a:
Linux thinkpad 3.11.10-21-xen #1 SMP Mon Jul 21 15:28:46 UTC 2014
(9a9565d) x86_64 x86_64 x86_64 GNU/Linux

lsb_release -a:
LSB Version:	n/a
Distributor ID:	openSUSE project
Description:	openSUSE 13.1 (Bottle) (x86_64)
Release:	13.1
Codename:	Bottle

gcc --version:
gcc (SUSE Linux) 4.8.1 20130909 [gcc-4_8-branch revision 202388]

ld --version:
GNU ld (GNU Binutils; openSUSE 13.1) 2.23.2
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)

iQEcBAEBAgAGBQJUfLQoAAoJEKnJ+4MkCuMT+AgH/3htI5RktX0R/S5X5g5KjrfQ
vfkuICRZMdN6VSvL8V/ux+vOyyA4PF1sPQE17bx82JEgxnETyRwPC4RUyDUsr7Iy
fkW/PYU//iDWvg9A9IsDpX7B1cw1RhFtLKhQ0NB4xutb+Zby9cqbSfwESktBxaOn
v7/T9idbLyDxRF9arrMFvcpx7lB2PzZimtJEwq37E/BfO45pJN4NWMkL6Q6axpaZ
/bYq08hS9ndg5wcb67FGSXDmWTIRkn6rbVuaVy1l/mnYRUYGTJnGMnpxgwM3aQ/h
j1Z3Cw460JVOfZXWs4z1CBeAhf72QzWbkp5d2SQLMAXeYuW0CO0R6udcdepXW4w=
=6Alh
-----END PGP SIGNATURE-----


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]