SPU overlay headers

[Alan Modra]

Overlay PT_LOAD headers are moved early for reasons explained by
comments in spu_elf_modify_segment_map. This patch fixes cases that
shouldn't occur in sane SPU executables.

* elf32-spu.c (spu_elf_modify_segment_map): Don't insert
overlays before segment containing headers.

diff --git a/bfd/elf32-spu.c b/bfd/elf32-spu.c
index bb3264f236..033db9ca99 100644
--- a/bfd/elf32-spu.c
+++ b/bfd/elf32-spu.c
@@ -5231,7 +5231,7 @@ spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
{
asection *toe, *s;
struct elf_segment_map *m, *m_overlay;
- struct elf_segment_map **p, **p_overlay;
+ struct elf_segment_map **p, **p_overlay, **first_load;
unsigned int i;

if (info == NULL)
@@ -5290,24 +5290,40 @@ spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
/* Move all overlay segments onto a separate list. */
p = &elf_seg_map (abfd);
p_overlay = &m_overlay;
+ m_overlay = NULL;
+ first_load = NULL;
while (*p != NULL)
{
- if ((*p)->p_type == PT_LOAD && (*p)->count == 1
- && spu_elf_section_data ((*p)->sections[0])->u.o.ovl_index != 0)
+ if ((*p)->p_type == PT_LOAD)
{
- m = *p;
- *p = m->next;
- *p_overlay = m;
- p_overlay = &m->next;
- continue;
+ if (!first_load)
+ first_load = p;
+ if ((*p)->count == 1
+ && spu_elf_section_data ((*p)->sections[0])->u.o.ovl_index != 0)
+ {
+ m = *p;
+ *p = m->next;
+ *p_overlay = m;
+ p_overlay = &m->next;
+ continue;
+ }
}
-
p = &((*p)->next);
}

/* Re-insert overlay segments at the head of the segment map. */
- *p_overlay = elf_seg_map (abfd);
- elf_seg_map (abfd) = m_overlay;
+ if (m_overlay != NULL)
+ {
+ p = first_load;
+ if (*p != NULL && (*p)->p_type == PT_LOAD && (*p)->includes_filehdr)
+ /* It doesn't really make sense for someone to include the ELF
+ file header into an spu image, but if they do the code that
+ assigns p_offset needs to see the segment containing the
+ header first. */
+ p = &(*p)->next;
+ *p_overlay = *p;
+ *p = m_overlay;
+ }

return TRUE;
}