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Message-ID: <20180718201928.GN4418@port70.net>
Date: Wed, 18 Jul 2018 22:19:28 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: Re: Segmentation fault in static binaries built with
recent binutils
* Szabolcs Nagy <nsz@...t70.net> [2018-07-18 21:38:34 +0200]:
> seems like another musl-gcc wrapper issue, if i do the linking
> manually then i get a working binary, havent yet figured out why
>
> manual linking:
>
> Program Headers:
> Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
> LOAD 0x000000 0x0000000000400000 0x0000000000400000 0x0001ec 0x0001ec R 0x1000
> LOAD 0x001000 0x0000000000401000 0x0000000000401000 0x0005a4 0x0005a4 R E 0x1000
> LOAD 0x002000 0x0000000000402000 0x0000000000402000 0x00004c 0x00004c R 0x1000
> LOAD 0x002ff0 0x0000000000403ff0 0x0000000000403ff0 0x000018 0x0002a8 RW 0x1000
> NOTE 0x0001c8 0x00000000004001c8 0x00000000004001c8 0x000024 0x000024 R 0x4
> GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW 0x10
> GNU_RELRO 0x002ff0 0x0000000000403ff0 0x0000000000403ff0 0x000010 0x000010 R 0x1
>
> musl-gcc linking:
>
> Program Headers:
> Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
> LOAD 0x001000 0x0000000000401000 0x0000000000401000 0x0005a4 0x0005a4 R E 0x1000
> LOAD 0x002000 0x0000000000402000 0x0000000000402000 0x00004c 0x00004c R 0x1000
> LOAD 0x002ff0 0x0000000000403ff0 0x0000000000403ff0 0x000018 0x0002a8 RW 0x1000
> GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW 0x10
> GNU_RELRO 0x002ff0 0x0000000000403ff0 0x0000000000403ff0 0x000010 0x000010 R 0x1
the difference between the two cases was --build-id
--build-id=sha1 works, --build-id=none segfaults
i assume the note section with the build id happens
to force ld to keep the initial load segment, but
that should be there without any note section, so
it's likely a binutils bug (i see it on 2.30 and
master branch too)
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