bug in the way Linux loads elf files...

From: Mark Manning
Date: Sun Mar 11 2012 - 18:49:42 EST


It seems that the linux kernel does not exactly conform to the TIS elf
standard. as follows...


I have a small asm source file that a assemble with nasm

[section text]
global _start

_start:
mov eax, 1
int 0x80

after linking i end up with a elf executable which does nothing
execept terminate which of course works perfectly fine.

If however i modify the .text sections program header to make the
memory size larger than the file size the process is killed before it
is even run. I have not tracked down where this happens.

Type Offset VirtAddr PhysAddr FileSiz
MemSiz Flg Align
LOAD 0x000000 0x08048000 0x08048000 0x0007b 0x01000 R 0x1000

i patched MemSiz to be larger than FileSiz which should work but does not.
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