Where this come out?

[horseriver]

On Sat, Jan 19, 2013 at 10:53:26PM +0700, Mulyadi Santosa wrote:
> On Sat, Jan 19, 2013 at 12:19 PM, horseriver <horserivers at gmail.com> wrote:
> > hi:
> >
> >   I am linking a .so from one .o file with my specified linker script.
> >   In this linker script file , I do not use SIZEOF_HEADERS,but ld still
> >   report this error :
> >
> >                   Not enough room for program headers, try linking with -N
> 
> you linker script ... can that be written down here, please? we are
> not some sort of mind reader, you know?

 Here is the script :

 VSYSCALL_BASE = 0xffffe000;

SECTIONS
{
  . = VSYSCALL_BASE ;

  .hash           : { *(.hash) }	:text	 
  .dynsym         : { *(.dynsym) }
  .dynstr         : { *(.dynstr) }
  .gnu.version    : { *(.gnu.version) }
  .gnu.version_d  : { *(.gnu.version_d) }
  .gnu.version_r  : { *(.gnu.version_r) }

  /* This linker script is used both with -r and with -shared.
     For the layouts to match, we need to skip more than enough
     space for the dynamic symbol table et al.  If this amount
     is insufficient, ld -shared will barf.  Just increase it here.  */
  .  = 0x400;

  .text           : { *(.text) }		:text =0x90909090

  .eh_frame_hdr   : { *(.eh_frame_hdr) }	:text :eh_frame_hdr
  .eh_frame       : { KEEP (*(.eh_frame)) }	:text
  .dynamic        : { *(.dynamic) }	  	:text :dynamic
  .useless        : {
  		  *(.got.plt) *(.got)
		  *(.data .data.* .gnu.linkonce.d.*)
		  *(.dynbss)
		  *(.bss .bss.* .gnu.linkonce.b.*)
  }							:text
}

/*
 * We must supply the ELF program headers explicitly to get just one
 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
 */
PHDRS
{
  text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
  dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
  eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */
}

/*
 * This controls what symbols we export from the DSO.
 */
VERSION
{
  LINUX_2.6 {
    global:
	__kernel_vsyscall;
    	__kernel_sigreturn;
    	__kernel_rt_sigreturn;

    local: *;
  };
}

/* The ELF entry point can be used to set the AT_SYSINFO value.  */
ENTRY(__kernel_vsyscall);

Thanks!

> 
> 
> -- 
> regards,
> 
> Mulyadi Santosa
> Freelance Linux trainer and consultant
> 
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com