Re: Defining a section that isn't file-backed

[Mike Hearn <mike at theoretic dot com>]

Thanks Nick,

I've tried this but unfortunately get:

gcc -o lds1 -Wl,-T,lds1.ldscript -lm -ldl -lncurses -lpthread -lssl -lpam -luuid -ltermcap lds1.c
/usr/bin/ld: lds1: Not enough room for program headers (allocated 7, need 8)
/usr/bin/ld: final link failed: Bad value
collect2: ld returned 1 exit status


I'm using the default linker script on Fedora, but with the following
inserted after the code which lays out the BSS:

  /* WINE: reserve PE load area */
  .empty 0x400000 : { KEEP (*(.empty)) }

As you probably already know, I'm a Wine developer and want this to fix
problems caused by exec-shield and prelink. So, an area at 0x400000 of
256mb is a good starting point.

Any tips on what I'm doing wrong? I'm not sure if I need a new program
header for a new ELF section, and if so I don't know how to allocate
more room for one.

thanks -mike

On Mon, 2004-02-23 at 09:49, Nick Clifton wrote:
> What you need is a combination of a linker script and an assembler
> source file.  For example if you create an assembler file containing
> this:
> 	.section .empty, "a", @nobits
> 	.zero 40000
> 
> and then a linker script which contains:
> 
>         .empty 0x100 : { KEEP (*(.empty)) }
> 
> You should get what you want.  Obviously you will need to change the
> numbers to reflect the size and location that you want.
> 
> Cheers
>         Nick
>