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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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