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[Bug ld/31795] ld.bfd makes ELFs of type ET_EXEC for static PIEs when lo


From: hjl.tools at gmail dot com
Subject: [Bug ld/31795] ld.bfd makes ELFs of type ET_EXEC for static PIEs when load address is non-0
Date: Sun, 26 May 2024 14:39:00 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=31795

--- Comment #29 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to mintsuki from comment #27)
> This is the aforementioned other kernel's readelf -d output:
> 
> 
> Dynamic section at offset 0x46b70 contains 13 entries:
>   Tag        Type                         Name/Value
>  0x0000000000000004 (HASH)               0xffffffff8003c140
>  0x000000006ffffef5 (GNU_HASH)           0xffffffff8003c150
>  0x0000000000000005 (STRTAB)             0xffffffff8003c138
>  0x0000000000000006 (SYMTAB)             0xffffffff8003c120
>  0x000000000000000a (STRSZ)              1 (bytes)
>  0x000000000000000b (SYMENT)             24 (bytes)
>  0x0000000000000015 (DEBUG)              0x0
>  0x0000000000000007 (RELA)               0xffffffff8003c170
>  0x0000000000000008 (RELASZ)             27264 (bytes)
>  0x0000000000000009 (RELAENT)            24 (bytes)
>  0x000000006ffffffb (FLAGS_1)            Flags: PIE
>  0x000000006ffffff9 (RELACOUNT)          1136
>  0x0000000000000000 (NULL)               0x0
> 

Your kernel contains the relocated addresses in dynamic section since its
load address != 0.  Try load address == 0, these addresses will be different.
You need to decide how to handle addresses like

  0x0000000000000007 (RELA)               0xffffffff8003c170

Should you add load address to them or not?

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