[RFA] Fix an i386 ld test FAIL

[Jie Zhang]

This patch fixes "Invalid allocated section" test in 
ld/testsuite/ld-i386/i386.exp when testing ld on native i686-pc-linux-gnu.

This test case consumes all the 1G memory + 1G swap when testing on my 
32bit i686 PC and finally times out.

For the section .foo in that test case, sec->vma == 0 and p->p_vaddr + 
p->p_memsz == 0xc0100008. So in the following statement:

   bfd_signed_vma adjust = sec->vma - (p->p_vaddr + p->p_memsz);

adjust is 0x3feffff8 because we are doing 32bit calculation. Thus the 
expected "overlaps preious sections" error is not reported.

Regtested with native i686-pc-linux-gnu. Is this patch OK?


-- 
Jie Zhang
CodeSourcery
(650) 331-3385 x735
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