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* ldlang.c (lang_check_section_addresses): Catch overlap for 

sections that wrap around the address space.
This commit is contained in:
Alan Modra 2010-07-17 03:12:02 +00:00
parent b559959291
commit f4427a75c8
2 changed files with 21 additions and 11 deletions
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5
ld/ChangeLog
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@ -1,3 +1,8 @@
2010-07-17 Alan Modra <amodra@gmail.com>
* ldlang.c (lang_check_section_addresses): Catch overlap for
sections that wrap around the address space.
2010-06-29 Nick Clifton <nickc@redhat.com>
* scripttempl/xstormy16.sc (.gcc_except_table): Include sections

27
ld/ldlang.c
View File

@ -4561,13 +4561,13 @@ sort_sections_by_lma (const void *arg1, const void *arg2)
static void
lang_check_section_addresses (void)
{
asection *s, *os;
asection *s, *p;
asection **sections, **spp;
unsigned int count;
bfd_vma s_start;
bfd_vma s_end;
bfd_vma os_start;
bfd_vma os_end;
bfd_vma p_start;
bfd_vma p_end;
bfd_size_type amt;
lang_memory_region_type *m;
@ -4600,24 +4600,29 @@ lang_check_section_addresses (void)
spp = sections;
s = *spp++;
s_start = bfd_section_lma (link_info.output_bfd, s);
s_start = s->lma;
s_end = s_start + TO_ADDR (s->size) - 1;
for (count--; count; count--)
{
/* We must check the sections' LMA addresses not their VMA
addresses because overlay sections can have overlapping VMAs
but they must have distinct LMAs. */
os = s;
os_start = s_start;
os_end = s_end;
p = s;
p_start = s_start;
p_end = s_end;
s = *spp++;
s_start = bfd_section_lma (link_info.output_bfd, s);
s_start = s->lma;
s_end = s_start + TO_ADDR (s->size) - 1;
/* Look for an overlap. */
if (s_end >= os_start && s_start <= os_end)
/* Look for an overlap. We have sorted sections by lma, so we
know that s_start >= p_start. Besides the obvious case of
overlap when the current section starts before the previous
one ends, we also must have overlap if the previous section
wraps around the address space. */
if (s_start <= p_end
|| p_end < p_start)
einfo (_("%X%P: section %s loaded at [%V,%V] overlaps section %s loaded at [%V,%V]\n"),
s->name, s_start, s_end, os->name, os_start, os_end);
s->name, s_start, s_end, p->name, p_start, p_end);
}
free (sections);