[GOLD] -Ttext does not relocate as expected

Alan Modra amodra@gmail.com
Thu Mar 21 02:45:00 GMT 2013


On Wed, Mar 20, 2013 at 06:10:03PM -0700, ryan wrote:
> >>>>> ld -m elf_i386 -N -e start -Ttext 0x7c00 -o boot.out boot.o

It's indirectly caused by -N.  I think the sequence of events is:
1) -N puts all input sections into the output .text section, including
   a zero size .data
2) this marks the output .text as writable
3) the following code in layout.cc doesn't recognize .text as part of
   the text segment

	  else if (parameters->options().user_set_Ttext()
		   && ((*p)->flags() & elfcpp::PF_W) == 0)
	    {
	      are_addresses_set = true;
	    }

4) leading to 

	  if (!are_addresses_set)
	    {
	      // Skip the address forward one page, maintaining the same
	      // position within the page.  This lets us store both segments

-- 
Alan Modra
Australia Development Lab, IBM



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