From: Florian Weimer <fweimer@redhat.com>
To: Jacob Kroon <jacob.kroon@gmail.com>
Cc: Jacob Kroon via Gdb <gdb@sourceware.org>
Subject: Re: Debugging ld.so in gdb
Date: Fri, 04 Feb 2022 15:22:27 +0100 [thread overview]
Message-ID: <87y22qognw.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <c2a11d90-6d66-000d-f91e-fa1952382580@gmail.com> (Jacob Kroon's message of "Fri, 4 Feb 2022 15:09:42 +0100")
* Jacob Kroon:
> This is what I get, following the instructions above:
>
>> 171966 0x00007ffff7fd85a0 <dfs_traversal+80>: mov 0x0(%r13),%rax
>> 171967 0x00007ffff7fd85a4 <dfs_traversal+84>: lea -0x8(%rax),%rdx
>> 171968 0x00007ffff7fd85a8 <dfs_traversal+88>: mov %rdx,0x0(%r13)
>> 171969 0x00007ffff7fd85ac <dfs_traversal+92>: mov %rbp,-0x8(%rax)
>> 171970 0x00007ffff7fd85b0 <dfs_traversal+96>: add $0x8,%rsp
>> 171971 0x00007ffff7fd85b4 <dfs_traversal+100>: pop %rbx
>> 171972 0x00007ffff7fd85b5 <dfs_traversal+101>: pop %rbp
>> 171973 0x00007ffff7fd85b6 <dfs_traversal+102>: pop %r12
>> 171974 0x00007ffff7fd85b8 <dfs_traversal+104>: pop %r13
>> 171975 0x00007ffff7fd85ba <dfs_traversal+106>: ret
>
> Does that make sense ? Any other information I can provide. This is with
> glibc-2.34-24.fc35.x86_64, Fedora 35.
This doesn't really make sense. There's probably some GDB option to get
a longer trace.
If it is crashing at the RET, it means that either code has been mapped
over, or the stack has been corrupted. At the crash site, what does
print *(void**)$rsp
print?
disassemble *(void**)$rsp
could also be interesting.
Thanks,
Florian
next prev parent reply other threads:[~2022-02-04 14:22 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-04 13:45 Jacob Kroon
2022-02-04 13:58 ` Florian Weimer
2022-02-04 14:09 ` Jacob Kroon
2022-02-04 14:22 ` Florian Weimer [this message]
2022-02-04 14:27 ` Jacob Kroon
2022-02-04 16:09 ` Florian Weimer
2022-02-04 16:53 ` Jacob Kroon
2022-02-04 17:04 ` Florian Weimer
2022-02-04 17:11 ` Jacob Kroon
2022-02-04 17:15 ` Florian Weimer
2022-02-07 8:36 ` Jacob Kroon
2022-02-07 11:46 ` Jacob Kroon
2022-02-07 11:55 ` Florian Weimer
2022-02-07 12:15 ` Jacob Kroon
2022-02-07 12:27 ` Florian Weimer
2022-02-07 12:32 ` Jacob Kroon
2022-02-07 13:39 ` Jacob Kroon
2022-02-07 13:45 ` Jacob Kroon
2022-02-07 13:53 ` Adhemerval Zanella
2022-02-07 13:54 ` Jacob Kroon
2022-02-07 14:07 ` Florian Weimer
2022-02-07 16:28 ` Florian Weimer
2022-02-07 17:04 ` Jacob Kroon
2022-02-04 14:45 ` Jacob Kroon
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