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authorH.J. Lu <hjl.tools@gmail.com>2009-11-17 19:21:53 +0000
committerH.J. Lu <hjl.tools@gmail.com>2009-11-17 19:21:53 +0000
commita231ddc0b3e0c5ccb3fa1d24b18d4f0d35977e4e (patch)
tree265e02e0777af32a4f18fb6803d8a29427591576 /bfd/elfxx-ia64.c
parent276a961bfff3cdff07ceae5fcb5f7ff1aa0a2d81 (diff)
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2009-11-17 H.J. Lu <hongjiu.lu@intel.com>
PR ld/10955 * elfxx-ia64.c (elfNN_ia64_link_hash_table): Add max_short_sec, max_short_offset, min_short_sec and min_short_offset. (elfNN_ia64_update_short_info): New. (elfNN_ia64_relax_section): Update max_short_sec, max_short_offset, min_short_sec and min_short_offset. (elfNN_ia64_choose_gp): Use min_short_sec/max_short_sec if they are set.
Diffstat (limited to 'bfd/elfxx-ia64.c')
-rw-r--r--bfd/elfxx-ia64.c102
1 files changed, 92 insertions, 10 deletions
diff --git a/bfd/elfxx-ia64.c b/bfd/elfxx-ia64.c
index 932886b..5bf4d9e 100644
--- a/bfd/elfxx-ia64.c
+++ b/bfd/elfxx-ia64.c
@@ -172,6 +172,14 @@ struct elfNN_ia64_link_hash_table
unsigned reltext : 1; /* are there relocs against readonly sections? */
unsigned self_dtpmod_done : 1;/* has self DTPMOD entry been finished? */
bfd_vma self_dtpmod_offset; /* .got offset to self DTPMOD entry */
+ /* There are maybe R_IA64_GPREL22 relocations, including those
+ optimized from R_IA64_LTOFF22X, against non-SHF_IA_64_SHORT
+ sections. We need to record those sections so that we can choose
+ a proper GP to cover all R_IA64_GPREL22 relocations. */
+ asection *max_short_sec; /* maximum short section */
+ bfd_vma max_short_offset; /* maximum short offset */
+ asection *min_short_sec; /* minimum short section */
+ bfd_vma min_short_offset; /* minimum short offset */
htab_t loc_hash_table;
void *loc_hash_memory;
@@ -752,6 +760,41 @@ elfNN_ia64_relax_brl (bfd_byte *contents, bfd_vma off)
/* These functions do relaxation for IA-64 ELF. */
+static void
+elfNN_ia64_update_short_info (asection *sec, bfd_vma offset,
+ struct elfNN_ia64_link_hash_table *ia64_info)
+{
+ /* Skip SHF_IA_64_SHORT sections. */
+ if (sec->flags & SEC_SMALL_DATA)
+ return;
+
+ if (!ia64_info->min_short_sec)
+ {
+ ia64_info->max_short_sec = sec;
+ ia64_info->max_short_offset = offset;
+ ia64_info->min_short_sec = sec;
+ ia64_info->min_short_offset = offset;
+ }
+ else if (sec == ia64_info->max_short_sec
+ && offset > ia64_info->max_short_offset)
+ ia64_info->max_short_offset = offset;
+ else if (sec == ia64_info->min_short_sec
+ && offset < ia64_info->min_short_offset)
+ ia64_info->min_short_offset = offset;
+ else if (sec->output_section->vma
+ > ia64_info->max_short_sec->output_section->vma)
+ {
+ ia64_info->max_short_sec = sec;
+ ia64_info->max_short_offset = offset;
+ }
+ else if (sec->output_section->vma
+ < ia64_info->min_short_sec->output_section->vma)
+ {
+ ia64_info->min_short_sec = sec;
+ ia64_info->min_short_offset = offset;
+ }
+}
+
static bfd_boolean
elfNN_ia64_relax_section (bfd *abfd, asection *sec,
struct bfd_link_info *link_info,
@@ -855,6 +898,9 @@ elfNN_ia64_relax_section (bfd *abfd, asection *sec,
is_branch = TRUE;
break;
+ case R_IA64_GPREL22:
+ /* Update max_short_sec/min_short_sec. */
+
case R_IA64_LTOFF22X:
case R_IA64_LDXMOV:
/* We can't relax ldx/mov in pass 0 since br relaxations will
@@ -1171,7 +1217,11 @@ elfNN_ia64_relax_section (bfd *abfd, asection *sec,
||(bfd_signed_vma) (symaddr - gp) < -0x200000)
continue;
- if (r_type == R_IA64_LTOFF22X)
+ if (r_type == R_IA64_GPREL22)
+ elfNN_ia64_update_short_info (tsec,
+ tsec->output_offset + toff,
+ ia64_info);
+ else if (r_type == R_IA64_LTOFF22X)
{
irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
R_IA64_GPREL22);
@@ -1181,6 +1231,10 @@ elfNN_ia64_relax_section (bfd *abfd, asection *sec,
dyn_i->want_gotx = 0;
changed_got |= !dyn_i->want_got;
}
+
+ elfNN_ia64_update_short_info (tsec,
+ tsec->output_offset + toff,
+ ia64_info);
}
else
{
@@ -4256,6 +4310,20 @@ elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info)
}
}
+ if (ia64_info->min_short_sec)
+ {
+ if (min_short_vma
+ > (ia64_info->min_short_sec->output_section->vma
+ + ia64_info->min_short_offset))
+ min_short_vma = (ia64_info->min_short_sec->output_section->vma
+ + ia64_info->min_short_offset);
+ if (max_short_vma
+ < (ia64_info->max_short_sec->output_section->vma
+ + ia64_info->max_short_offset))
+ max_short_vma = (ia64_info->max_short_sec->output_section->vma
+ + ia64_info->max_short_offset);
+ }
+
/* See if the user wants to force a value. */
gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE,
FALSE, FALSE);
@@ -4273,17 +4341,30 @@ elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info)
{
/* Pick a sensible value. */
- asection *got_sec = ia64_info->root.sgot;
+ if (ia64_info->min_short_sec)
+ {
+ bfd_vma short_range = max_short_vma - min_short_vma;
- /* Start with just the address of the .got. */
- if (got_sec)
- gp_val = got_sec->output_section->vma;
- else if (max_short_vma != 0)
- gp_val = min_short_vma;
- else if (max_vma - min_vma < 0x200000)
- gp_val = min_vma;
+ /* If min_short_sec is set, pick one in the middle bewteen
+ min_short_vma and max_short_vma. */
+ if (short_range >= 0x400000)
+ goto overflow;
+ gp_val = min_short_vma + short_range / 2;
+ }
else
- gp_val = max_vma - 0x200000 + 8;
+ {
+ asection *got_sec = ia64_info->root.sgot;
+
+ /* Start with just the address of the .got. */
+ if (got_sec)
+ gp_val = got_sec->output_section->vma;
+ else if (max_short_vma != 0)
+ gp_val = min_short_vma;
+ else if (max_vma - min_vma < 0x200000)
+ gp_val = min_vma;
+ else
+ gp_val = max_vma - 0x200000 + 8;
+ }
/* If it is possible to address the entire image, but we
don't with the choice above, adjust. */
@@ -4310,6 +4391,7 @@ elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info)
{
if (max_short_vma - min_short_vma >= 0x400000)
{
+overflow:
(*_bfd_error_handler)
(_("%s: short data segment overflowed (0x%lx >= 0x400000)"),
bfd_get_filename (abfd),