[Elftoolchain-developers] elftoolchain strip bug

[Michal M. <ak...@ja...>]

Hello,

I'm trying to get elftoolchain to work on Bitrig, an OpenBSD fork.


Elftoolchain compiles after applying the attached patch, but strip seems
to have a bug. Here is the difference between a binary stripped with gnu
strip, and elftoolchain strip:

$ diff dump.elf dump.gnu
73,77c73,77
<       p_offset: 120128
<       p_vaddr: 0x81d540
<       p_paddr: 0x81d540
<       p_filesz: 0
<       p_memsz: 0
---
>       p_offset: 119216
>       p_vaddr: 0x71d1b0
>       p_paddr: 0x71d1b0
>       p_filesz: 912
>       p_memsz: 912
83,87c83,87
<       p_offset: 119216
<       p_vaddr: 0x71d1b0
<       p_paddr: 0x71d1b0
<       p_filesz: 912
<       p_memsz: 10504
---
>       p_offset: 120128
>       p_vaddr: 0x81d540
>       p_paddr: 0x81d540
>       p_filesz: 0
>       p_memsz: 9592

- two sections are swapped, and their p_memsz are wrong. This results in
a segfault.

After stripping the binary a second time there is another difference:
$ diff dump.elf dump.elfelf
74,75c74,75
<       p_vaddr: 0x81d540
<       p_paddr: 0x81d540
---
>       p_vaddr: 0x71d540
>       p_paddr: 0x71d540
- running this binary results in an Abort trap.


The same applies to OpenBSD.

-- 
Michal Mazurek