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Date: Thu, 4 Sep 2014 03:35:45 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: libc.so segfaults on mips
On Thu, Sep 04, 2014 at 03:07:57PM +0800, Рысь wrote:
> Hi list!
>
> Not a really blocking bug but I was wondering why cross compiled
> musl libc.so for embedded wrt system is segfaults with this:
>
> % ./strace ./libc.so
> execve("./libc.so", ["./libc.so"], [/* 10 vars */]) = 0
> --- {si_signo=SIGSEGV, si_code=SI_USER, si_errno=EPERM, si_addr=0x4} (Segmentation fault) ---
> +++ killed by SIGSEGV +++
> Segmentation fault
>
> A strange segfault with EPERM.
>
> The target is mips2 bigendian router, specifically it is ar9331 SoC.
> This is how file reports on libc.so: ELF 32-bit MSB shared object,
> MIPS, MIPS-I version 1 (SYSV), dynamically linked, not stripped
>
> Such a trouble I had once when system enforced mmap_min_addr,
> however there it has default value.
>
> The toolchain is somewhat old: gcc 4.2.1, binutils 2.17.50.0.17 but
> confirmed working and stable.
>
> Musl is 1.1.4.
>
> What else can cause this?
Could you attach the output of readelf -a libc.so? I'm guessing the
problem is a broken linker that's accepting the option but not
actually honoring -Bsymbolic-functions, or another toolchain related
issue.
Rich
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