[lkml]   [2008]   [Feb]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Patch] Elf loader crash while zero-filling .bss
Jiri Kosina wrote:
> On Mon, 11 Feb 2008, Abel Bernabeu wrote:
>> In such a way that set_brk(0x0, 0x100) does not alloc any space at all.
>> There are just more ways to get no memory allocation than
>> set_brk(elf_bss, elf_bss) (the equalness condition i've changed).
>> Sorry, the correct description for the patch may be:
>> set_brk(start, end) allocs just page aligned regions (by "colapsing"
>> both extremes to the END of the page in which they lay)... That means
>> than even if both pointers are not equal there are still some chances
>> that set_brk has allocated no space at all because because
>> ELF_PAGEALIGN(elf_bss) == ELF_PAGEALIGN(elf_brk)
> Now, the question is whether it is valid for ELF binary to not have the
> end of .bss section (if present at all) not page-aligned.

Why wouldn't it be? It would, however, be valid to the kernel to round
it up to the next boundary.


 \ /
  Last update: 2008-02-11 21:39    [W:0.041 / U:45.620 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site