From: Igmar Palsenberg <igmar@palsenberg.com>
To: musl@lists.openwall.com
Subject: Re: Executable crashes at __libc_start_main
Date: Tue, 17 Feb 2015 07:49:55 +0100 (CET) [thread overview]
Message-ID: <alpine.LRH.2.11.1502170748400.20786@s1.palsenberg.com> (raw)
In-Reply-To: <54E29C2C.5080907@davidgf.es>
> Finally I got a core dump and the program crashes here:
>
> 88c8: e1550007 cmp r5, r7
> 88cc: 2a000003 bcs 88e0 <__libc_start_main+0x1b0>
> 88d0: e4953004 ldr r3, [r5], #4
> 88d4: e1a0e00f mov lr, pc
> 88d8: e12fff13 bx r3
> 88dc: eafffff9 b 88c8 <__libc_start_main+0x198>
>
> In the 88d8 instruction to be more exact. Seems that R3 is holding the
> value 0xc8000082!!! Where is that 0xC8 at the beginning comming from?
> The PC reported by the core dump is 0xc8000080 which I guess it's just
> the vlaue of R3 aligned to 4 byte boundary. R5 points to the right
> place, it's just the value loaded by the load. Could it be that
> something corrupts my ELF? Could it be the OS being really dumb at
> loading the ELF? It's a pretty old kernel, 2.6.21.
You're absolutely sure your toolchain is OK ? Hard to track issues like
this are usually caused by a wrong toolchain, and ARM has some nice quirks
when it comes to this.
Igmar
next prev parent reply other threads:[~2015-02-17 6:49 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-17 1:41 David Guillen Fandos
2015-02-17 4:21 ` Rich Felker
2015-02-17 6:49 ` Igmar Palsenberg [this message]
2015-02-17 9:20 ` David Guillen
2015-02-17 15:46 ` Rich Felker
2015-02-17 15:50 ` David Guillen
2015-02-17 17:31 ` David Guillen Fandos
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.LRH.2.11.1502170748400.20786@s1.palsenberg.com \
--to=igmar@palsenberg.com \
--cc=musl@lists.openwall.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/musl/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).