Date: Tue, 7 Mar 2017 15:39:05 -0500 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: musl segfaulting when compiled with -O2 On Tue, Mar 07, 2017 at 05:32:35PM -0300, Breno Leitao wrote: > Musl package on Debian on ppc64le is broken. > > When running any software with it, it segfaults. Doing a little bit of > debugging I found that libc.so is broken. > > I got the upstream code, and found that the problme is also > reproducible. > > I found that the problem only happen when compiling with -O2 and -O3. If > I compile musl with -O1 or -O0, the problm does not happen. > > This is the bt of the code that crashes: > > (gdb) bt > #0 0x0000000148b84dc0 in ?? () > #1 0x0000000048bdb8dc in _dlstart_c (sp=0x3fffc33294b0, dynv=<optimized out>) at ldso/dlstart.c:147 > #2 0x0000000048bdebe0 in _dlstart () > > (gdb) up > #1 0x0000000048bdb8dc in _dlstart_c (sp=0x3fffc33294b0, dynv=<optimized out>) at ldso/dlstart.c:147 > 147 dls2((void *)base, sp); > > $ gcc --version > gcc (Debian 6.3.0-5) 6.3.0 20170124 > > Not sure if this is a GCC issue or a musl issue now. Can you post the crashing libc.so somewhere? Depending on how they're building it, the problem could be in various different places. A glibc-targeted powerpc* gcc is not suitable for compiling musl, since it has various ABI mismatches, but that's probably not what you're seeing here even if one was used. Rich
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.