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Diffstat (limited to 'bfd/elf32-arm.h')
-rw-r--r--bfd/elf32-arm.h265
1 files changed, 186 insertions, 79 deletions
diff --git a/bfd/elf32-arm.h b/bfd/elf32-arm.h
index 79e089a..27e74d9 100644
--- a/bfd/elf32-arm.h
+++ b/bfd/elf32-arm.h
@@ -186,6 +186,9 @@ struct elf32_arm_link_hash_table
Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */
int target1_is_rel;
+ /* The relocation to use for R_ARM_TARGET2 relocations. */
+ int target2_reloc;
+
/* The number of bytes in the initial entry in the PLT. */
bfd_size_type plt_header_size;
@@ -378,6 +381,7 @@ elf32_arm_link_hash_table_create (bfd *abfd)
ret->no_pipeline_knowledge = 0;
ret->byteswap_code = 0;
ret->target1_is_rel = 0;
+ ret->target2_reloc = R_ARM_NONE;
#ifdef FOUR_WORD_PLT
ret->plt_header_size = 16;
ret->plt_entry_size = 16;
@@ -757,8 +761,7 @@ bfd_boolean
bfd_elf32_arm_process_before_allocation (bfd *abfd,
struct bfd_link_info *link_info,
int no_pipeline_knowledge,
- int byteswap_code,
- int target1_is_rel)
+ int byteswap_code)
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Rela *internal_relocs = NULL;
@@ -781,7 +784,7 @@ bfd_elf32_arm_process_before_allocation (bfd *abfd,
BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
globals->no_pipeline_knowledge = no_pipeline_knowledge;
- globals->target1_is_rel = target1_is_rel;
+
if (byteswap_code && !bfd_big_endian (abfd))
{
_bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."),
@@ -906,6 +909,32 @@ error_return:
}
#endif
+
+#ifndef OLD_ARM_ABI
+/* Set target relocation values needed during linking. */
+
+void
+bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info,
+ int target1_is_rel,
+ char * target2_type)
+{
+ struct elf32_arm_link_hash_table *globals;
+
+ globals = elf32_arm_hash_table (link_info);
+
+ globals->target1_is_rel = target1_is_rel;
+ if (strcmp (target2_type, "rel") == 0)
+ globals->target2_reloc = R_ARM_REL32;
+ else if (strcmp (target2_type, "got-rel") == 0)
+ globals->target2_reloc = R_ARM_GOT_PREL;
+ else
+ {
+ _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."),
+ target2_type);
+ }
+}
+#endif
+
/* The thumb form of a long branch is a bit finicky, because the offset
encoding is split over two fields, each in it's own instruction. They
can occur in any order. So given a thumb form of long branch, and an
@@ -1151,6 +1180,32 @@ elf32_arm_to_thumb_stub (struct bfd_link_info * info,
return TRUE;
}
+
+#ifndef OLD_ARM_ABI
+/* Some relocations map to different relocations depending on the
+ target. Return the real relocation. */
+static int
+arm_real_reloc_type (struct elf32_arm_link_hash_table * globals,
+ int r_type)
+{
+ switch (r_type)
+ {
+ case R_ARM_TARGET1:
+ if (globals->target1_is_rel)
+ return R_ARM_REL32;
+ else
+ return R_ARM_ABS32;
+
+ case R_ARM_TARGET2:
+ return globals->target2_reloc;
+
+ default:
+ return r_type;
+ }
+}
+#endif /* OLD_ARM_ABI */
+
+
/* Perform a relocation as part of a final link. */
static bfd_reloc_status_type
@@ -1186,15 +1241,9 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto,
#ifndef OLD_ARM_ABI
/* Some relocation type map to different relocations depending on the
target. We pick the right one here. */
- if (r_type == R_ARM_TARGET1)
- {
- if (globals->target1_is_rel)
- r_type = R_ARM_REL32;
- else
- r_type = R_ARM_ABS32;
-
- howto = &elf32_arm_howto_table[r_type];
- }
+ r_type = arm_real_reloc_type (globals, r_type);
+ if (r_type != howto->type)
+ howto = elf32_arm_howto_from_type (r_type);
#endif /* OLD_ARM_ABI */
/* If the start address has been set, then set the EF_ARM_HASENTRY
@@ -1245,6 +1294,7 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto,
case R_ARM_REL32:
#ifndef OLD_ARM_ABI
case R_ARM_XPC25:
+ case R_ARM_PREL31:
#endif
case R_ARM_PLT32:
/* r_symndx will be zero only for relocs against symbols
@@ -1257,7 +1307,11 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto,
will use the symbol's value, which may point to a PLT entry, but we
don't need to handle that here. If we created a PLT entry, all
branches in this object should go to it. */
- if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
+ if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32
+#ifndef OLD_ARM_ABI
+ && r_type != R_ARM_PREL31
+#endif
+ )
&& h != NULL
&& splt != NULL
&& h->plt.offset != (bfd_vma) -1)
@@ -1279,8 +1333,11 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto,
into the output file to be resolved at run time. */
if (info->shared
&& (input_section->flags & SEC_ALLOC)
- && (r_type != R_ARM_REL32
- || !SYMBOL_CALLS_LOCAL (info, h))
+ && ((r_type != R_ARM_REL32
+#ifndef OLD_ARM_ABI
+ && r_type != R_ARM_PREL31
+#endif
+ ) || !SYMBOL_CALLS_LOCAL (info, h))
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
@@ -1480,6 +1537,24 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto,
+ input_section->output_offset + rel->r_offset);
value += addend;
break;
+
+#ifndef OLD_ARM_ABI
+ case R_ARM_PREL31:
+ value -= (input_section->output_section->vma
+ + input_section->output_offset + rel->r_offset);
+ value += signed_addend;
+ if (! h || h->root.type != bfd_link_hash_undefweak)
+ {
+ /* Check for overflow */
+ if ((value ^ (value >> 1)) & (1 << 30))
+ return bfd_reloc_overflow;
+ }
+ value &= 0x7fffffff;
+ value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000);
+ if (sym_flags == STT_ARM_TFUNC)
+ value |= 1;
+ break;
+#endif
}
bfd_put_32 (input_bfd, value, hit_data);
@@ -1769,6 +1844,9 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto,
(bfd_vma) 0);
case R_ARM_GOT32:
+#ifndef OLD_ARM_ABI
+ case R_ARM_GOT_PREL:
+#endif
/* Relocation is to the entry for this symbol in the
global offset table. */
if (sgot == NULL)
@@ -1857,6 +1935,8 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto,
value = sgot->output_offset + off;
}
+ if (r_type != R_ARM_GOT32)
+ value += sgot->output_section->vma;
return _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset, value,
@@ -2130,6 +2210,9 @@ elf32_arm_relocate_section (bfd * output_bfd,
break;
case R_ARM_GOT32:
+#ifndef OLD_ARM_ABI
+ case R_ARM_GOT_PREL:
+#endif
if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
(elf_hash_table (info)->dynamic_sections_created,
info->shared, h))
@@ -2726,6 +2809,9 @@ elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
const Elf_Internal_Rela *rel, *relend;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
+ struct elf32_arm_link_hash_table * globals;
+
+ globals = elf32_arm_hash_table (info);
elf_section_data (sec)->local_dynrel = NULL;
@@ -2735,66 +2821,77 @@ elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_ARM_GOT32:
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx >= symtab_hdr->sh_info)
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (h->got.refcount > 0)
- h->got.refcount -= 1;
- }
- else if (local_got_refcounts != NULL)
- {
- if (local_got_refcounts[r_symndx] > 0)
- local_got_refcounts[r_symndx] -= 1;
- }
- break;
+ {
+ int r_type;
- case R_ARM_ABS32:
- case R_ARM_REL32:
+ r_type = ELF32_R_TYPE (rel->r_info);
#ifndef OLD_ARM_ABI
- case R_ARM_TARGET1:
+ r_type = arm_real_reloc_type (globals, r_type);
#endif
- case R_ARM_PC24:
- case R_ARM_PLT32:
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx >= symtab_hdr->sh_info)
- {
- struct elf32_arm_link_hash_entry *eh;
- struct elf32_arm_relocs_copied **pp;
- struct elf32_arm_relocs_copied *p;
+ switch (r_type)
+ {
+ case R_ARM_GOT32:
+#ifndef OLD_ARM_ABI
+ case R_ARM_GOT_PREL:
+#endif
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h->got.refcount > 0)
+ h->got.refcount -= 1;
+ }
+ else if (local_got_refcounts != NULL)
+ {
+ if (local_got_refcounts[r_symndx] > 0)
+ local_got_refcounts[r_symndx] -= 1;
+ }
+ break;
+
+ case R_ARM_ABS32:
+ case R_ARM_REL32:
+ case R_ARM_PC24:
+ case R_ARM_PLT32:
+#ifndef OLD_ARM_ABI
+ case R_ARM_PREL31:
+#endif
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ struct elf32_arm_link_hash_entry *eh;
+ struct elf32_arm_relocs_copied **pp;
+ struct elf32_arm_relocs_copied *p;
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (h->plt.refcount > 0)
- h->plt.refcount -= 1;
+ if (h->plt.refcount > 0)
+ h->plt.refcount -= 1;
- if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
+ if (r_type == R_ARM_ABS32
#ifndef OLD_ARM_ABI
- || ELF32_R_TYPE (rel->r_info) == R_ARM_TARGET1
+ || r_type == R_ARM_PREL31
#endif
- || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
- {
- eh = (struct elf32_arm_link_hash_entry *) h;
+ || r_type == R_ARM_REL32)
+ {
+ eh = (struct elf32_arm_link_hash_entry *) h;
- for (pp = &eh->relocs_copied; (p = *pp) != NULL;
- pp = &p->next)
- if (p->section == sec)
- {
- p->count -= 1;
- if (p->count == 0)
- *pp = p->next;
- break;
- }
- }
- }
- break;
+ for (pp = &eh->relocs_copied; (p = *pp) != NULL;
+ pp = &p->next)
+ if (p->section == sec)
+ {
+ p->count -= 1;
+ if (p->count == 0)
+ *pp = p->next;
+ break;
+ }
+ }
+ }
+ break;
- default:
- break;
- }
+ default:
+ break;
+ }
+ }
return TRUE;
}
@@ -2837,16 +2934,24 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
{
struct elf_link_hash_entry *h;
unsigned long r_symndx;
+ int r_type;
r_symndx = ELF32_R_SYM (rel->r_info);
+ r_type = ELF32_R_TYPE (rel->r_info);
+#ifndef OLD_ARM_ABI
+ r_type = arm_real_reloc_type (htab, r_type);
+#endif
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- switch (ELF32_R_TYPE (rel->r_info))
+ switch (r_type)
{
case R_ARM_GOT32:
+#ifndef OLD_ARM_ABI
+ case R_ARM_GOT_PREL:
+#endif
/* This symbol requires a global offset table entry. */
if (h != NULL)
{
@@ -2871,7 +2976,9 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
}
local_got_refcounts[r_symndx] += 1;
}
- break;
+ if (r_type == R_ARM_GOT32)
+ break;
+ /* Fall through. */
case R_ARM_GOTOFF:
case R_ARM_GOTPC:
@@ -2886,11 +2993,11 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
case R_ARM_ABS32:
case R_ARM_REL32:
-#ifndef OLD_ARM_ABI
- case R_ARM_TARGET1:
-#endif
case R_ARM_PC24:
case R_ARM_PLT32:
+#ifndef OLD_ARM_ABI
+ case R_ARM_PREL31:
+#endif
if (h != NULL)
{
/* If this reloc is in a read-only section, we might
@@ -2906,8 +3013,8 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
refers to is in a different object. We can't tell for
sure yet, because something later might force the
symbol local. */
- if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24
- || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32)
+ if (r_type == R_ARM_PC24
+ || r_type == R_ARM_PLT32)
h->needs_plt = 1;
/* If we create a PLT entry, this relocation will reference
@@ -2929,12 +3036,12 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
relocs_copied field of the hash table entry. */
if (info->shared
&& (sec->flags & SEC_ALLOC) != 0
- && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
- && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32
+ && ((r_type != R_ARM_PC24
+ && r_type != R_ARM_PLT32
#ifndef OLD_ARM_ABI
- && ELF32_R_TYPE (rel->r_info) != R_ARM_TARGET1
+ && r_type != R_ARM_PREL31
#endif
- && ELF32_R_TYPE (rel->r_info) != R_ARM_REL32)
+ && r_type != R_ARM_REL32)
|| (h != NULL
&& (! info->symbolic
|| !h->def_regular))))
@@ -3017,11 +3124,11 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info,
p->count = 0;
}
- if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
+ if (r_type == R_ARM_ABS32
#ifndef OLD_ARM_ABI
- || ELF32_R_TYPE (rel->r_info) == R_ARM_TARGET1
+ || r_type == R_ARM_PREL31
#endif
- || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
+ || r_type == R_ARM_REL32)
p->count += 1;
}
break;
generated by cgit v1.1 at 2024-11-20 05:31:22 +0000