#include "elf-bfd.h"
#include "elf/ppc64.h"
#include "elf64-ppc.h"
+#include "dwarf2.h"
static bfd_reloc_status_type ppc64_elf_ha_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
#define bfd_elf64_mkobject ppc64_elf_mkobject
#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
#define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup
-#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
+#define bfd_elf64_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook
#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
}
}
-/* Merge backend specific data from an object file to the output
- object file when linking. */
-
-static bfd_boolean
-ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
-{
- /* Check if we have the same endianness. */
- if (ibfd->xvec->byteorder != obfd->xvec->byteorder
- && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
- && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
- {
- const char *msg;
-
- if (bfd_big_endian (ibfd))
- msg = _("%B: compiled for a big endian system "
- "and target is little endian");
- else
- msg = _("%B: compiled for a little endian system "
- "and target is big endian");
-
- (*_bfd_error_handler) (msg, ibfd);
-
- bfd_set_error (bfd_error_wrong_format);
- return FALSE;
- }
-
- return TRUE;
-}
-
/* Add extra PPC sections. */
static const struct bfd_elf_special_section ppc64_elf_special_sections[]=
asection *sfpr;
asection *brlt;
asection *relbrlt;
+ asection *glink_eh_frame;
/* Shortcut to .__tls_get_addr and __tls_get_addr. */
struct ppc_link_hash_entry *tls_get_addr;
/* Number of stubs against global syms. */
unsigned long stub_globals;
+ /* Set if PLT call stubs should load r11. */
+ unsigned int plt_static_chain:1;
+
/* Set if we should emit symbols for stubs. */
unsigned int emit_stub_syms:1;
|| ! bfd_set_section_alignment (dynobj, htab->glink, 3))
return FALSE;
+ if (!info->no_ld_generated_unwind_info)
+ {
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj,
+ ".eh_frame",
+ flags);
+ if (htab->glink_eh_frame == NULL
+ || !bfd_set_section_alignment (abfd, htab->glink_eh_frame, 2))
+ return FALSE;
+ }
+
flags = SEC_ALLOC | SEC_LINKER_CREATED;
htab->iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags);
if (htab->iplt == NULL
edir = (struct ppc_link_hash_entry *) dir;
eind = (struct ppc_link_hash_entry *) ind;
+ edir->is_func |= eind->is_func;
+ edir->is_func_descriptor |= eind->is_func_descriptor;
+ edir->tls_mask |= eind->tls_mask;
+ if (eind->oh != NULL)
+ edir->oh = ppc_follow_link (eind->oh);
+
+ /* If called to transfer flags for a weakdef during processing
+ of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
+ We clear it ourselves for ELIMINATE_COPY_RELOCS. */
+ if (!(ELIMINATE_COPY_RELOCS
+ && eind->elf.root.type != bfd_link_hash_indirect
+ && edir->elf.dynamic_adjusted))
+ edir->elf.non_got_ref |= eind->elf.non_got_ref;
+
+ edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
+ edir->elf.ref_regular |= eind->elf.ref_regular;
+ edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
+ edir->elf.needs_plt |= eind->elf.needs_plt;
+
+ /* If we were called to copy over info for a weak sym, that's all. */
+ if (eind->elf.root.type != bfd_link_hash_indirect)
+ return;
+
/* Copy over any dynamic relocs we may have on the indirect sym. */
if (eind->dyn_relocs != NULL)
{
eind->dyn_relocs = NULL;
}
- edir->is_func |= eind->is_func;
- edir->is_func_descriptor |= eind->is_func_descriptor;
- edir->tls_mask |= eind->tls_mask;
- if (eind->oh != NULL)
- edir->oh = ppc_follow_link (eind->oh);
-
- /* If called to transfer flags for a weakdef during processing
- of elf_adjust_dynamic_symbol, don't copy NON_GOT_REF.
- We clear it ourselves for ELIMINATE_COPY_RELOCS. */
- if (!(ELIMINATE_COPY_RELOCS
- && eind->elf.root.type != bfd_link_hash_indirect
- && edir->elf.dynamic_adjusted))
- edir->elf.non_got_ref |= eind->elf.non_got_ref;
-
- edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
- edir->elf.ref_regular |= eind->elf.ref_regular;
- edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
- edir->elf.needs_plt |= eind->elf.needs_plt;
-
- /* If we were called to copy over info for a weak sym, that's all. */
- if (eind->elf.root.type != bfd_link_hash_indirect)
- return;
-
/* Copy over got entries that we may have already seen to the
symbol which just became indirect. */
if (eind->elf.got.glist != NULL)
/* Strip this section if we don't need it; see the
comment below. */
}
+ else if (s == htab->glink_eh_frame)
+ {
+ if (!bfd_is_abs_section (s->output_section))
+ /* Not sized yet. */
+ continue;
+ }
else if (CONST_STRNEQ (s->name, ".rela"))
{
if (s->size != 0)
/* Build a .plt call stub. */
static inline bfd_byte *
-build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r)
+build_plt_stub (bfd *obfd, bfd_byte *p, int offset, Elf_Internal_Rela *r,
+ bfd_boolean plt_static_chain)
{
#define PPC_LO(v) ((v) & 0xffff)
#define PPC_HI(v) (((v) >> 16) & 0xffff)
bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
- if (PPC_HA (offset + 16) != PPC_HA (offset))
+ if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
{
bfd_put_32 (obfd, ADDI_R12_R12 | PPC_LO (offset), p), p += 4;
offset = 0;
}
bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset + 8), p), p += 4;
- bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
+ if (plt_static_chain)
+ bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset + 16), p), p += 4;
bfd_put_32 (obfd, BCTR, p), p += 4;
}
else
}
bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset), p), p += 4;
- if (PPC_HA (offset + 16) != PPC_HA (offset))
+ if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset))
{
bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4;
offset = 0;
}
bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
- bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
+ if (plt_static_chain)
+ bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4;
bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4;
bfd_put_32 (obfd, BCTR, p), p += 4;
}
static inline bfd_byte *
build_tls_get_addr_stub (bfd *obfd, bfd_byte *p, int offset,
- Elf_Internal_Rela *r)
+ Elf_Internal_Rela *r, bfd_boolean plt_static_chain)
{
bfd_put_32 (obfd, LD_R11_0R3 + 0, p), p += 4;
bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4;
if (r != NULL)
r[0].r_offset += 9 * 4;
- p = build_plt_stub (obfd, p, offset, r);
+ p = build_plt_stub (obfd, p, offset, r, plt_static_chain);
bfd_put_32 (obfd, BCTRL, p - 4);
bfd_put_32 (obfd, LD_R11_0R1 + 32, p), p += 4;
&& (stub_entry->h == htab->tls_get_addr_fd
|| stub_entry->h == htab->tls_get_addr)
&& !htab->no_tls_get_addr_opt)
- p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r);
+ p = build_tls_get_addr_stub (htab->stub_bfd, loc, off, r,
+ htab->plt_static_chain);
else
- p = build_plt_stub (htab->stub_bfd, loc, off, r);
+ p = build_plt_stub (htab->stub_bfd, loc, off, r,
+ htab->plt_static_chain);
size = p - loc;
break;
- htab->stub_group[stub_entry->id_sec->id].toc_off);
size = PLT_CALL_STUB_SIZE;
+ if (!htab->plt_static_chain)
+ size -= 4;
if (PPC_HA (off) == 0)
size -= 4;
if (PPC_HA (off + 16) != PPC_HA (off))
#undef PREV_SEC
}
+static const unsigned char glink_eh_frame_cie[] =
+{
+ 0, 0, 0, 16, /* length. */
+ 0, 0, 0, 0, /* id. */
+ 1, /* CIE version. */
+ 'z', 'R', 0, /* Augmentation string. */
+ 4, /* Code alignment. */
+ 0x78, /* Data alignment. */
+ 65, /* RA reg. */
+ 1, /* Augmentation size. */
+ DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
+ DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
+};
+
/* Determine and set the size of the stub section for a final link.
The basic idea here is to examine all the relocations looking for
instruction. */
bfd_boolean
-ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size)
+ppc64_elf_size_stubs (struct bfd_link_info *info, bfd_signed_vma group_size,
+ bfd_boolean plt_static_chain)
{
bfd_size_type stub_group_size;
bfd_boolean stubs_always_before_branch;
if (htab == NULL)
return FALSE;
+ htab->plt_static_chain = plt_static_chain;
stubs_always_before_branch = group_size < 0;
if (group_size < 0)
stub_group_size = -group_size;
htab->glink->flags |= SEC_RELOC;
}
+ if (htab->glink_eh_frame != NULL
+ && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
+ && (htab->glink_eh_frame->flags & SEC_EXCLUDE) == 0)
+ {
+ bfd_size_type size = 0;
+
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
+ size += 20;
+ if (htab->glink != NULL && htab->glink->size != 0)
+ size += 24;
+ if (size != 0)
+ size += sizeof (glink_eh_frame_cie);
+ htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
+ htab->glink_eh_frame->size = size;
+ }
+
for (stub_sec = htab->stub_bfd->sections;
stub_sec != NULL;
stub_sec = stub_sec->next)
/* Exit from this loop when no stubs have been added, and no stubs
have changed size. */
- if (stub_sec == NULL)
+ if (stub_sec == NULL
+ && (htab->glink_eh_frame == NULL
+ || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size))
break;
/* Ask the linker to do its stuff. */
return FALSE;
}
+ if (htab->glink_eh_frame != NULL
+ && htab->glink_eh_frame->size != 0)
+ {
+ bfd_vma val;
+
+ p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size);
+ if (p == NULL)
+ return FALSE;
+ htab->glink_eh_frame->contents = p;
+
+ htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size;
+
+ memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
+ /* CIE length (rewrite in case little-endian). */
+ bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
+ p += sizeof (glink_eh_frame_cie);
+
+ for (stub_sec = htab->stub_bfd->sections;
+ stub_sec != NULL;
+ stub_sec = stub_sec->next)
+ if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
+ {
+ /* FDE length. */
+ bfd_put_32 (htab->elf.dynobj, 16, p);
+ p += 4;
+ /* CIE pointer. */
+ val = p - htab->glink_eh_frame->contents;
+ bfd_put_32 (htab->elf.dynobj, val, p);
+ p += 4;
+ /* Offset to stub section. */
+ val = (stub_sec->output_section->vma
+ + stub_sec->output_offset);
+ val -= (htab->glink_eh_frame->output_section->vma
+ + htab->glink_eh_frame->output_offset);
+ val -= p - htab->glink_eh_frame->contents;
+ if (val + 0x80000000 > 0xffffffff)
+ {
+ info->callbacks->einfo
+ (_("%s offset too large for .eh_frame sdata4 encoding"),
+ stub_sec->name);
+ return FALSE;
+ }
+ bfd_put_32 (htab->elf.dynobj, val, p);
+ p += 4;
+ /* stub section size. */
+ bfd_put_32 (htab->elf.dynobj, stub_sec->rawsize, p);
+ p += 4;
+ /* Augmentation. */
+ p += 1;
+ /* Pad. */
+ p += 3;
+ }
+ if (htab->glink != NULL && htab->glink->size != 0)
+ {
+ /* FDE length. */
+ bfd_put_32 (htab->elf.dynobj, 20, p);
+ p += 4;
+ /* CIE pointer. */
+ val = p - htab->glink_eh_frame->contents;
+ bfd_put_32 (htab->elf.dynobj, val, p);
+ p += 4;
+ /* Offset to .glink. */
+ val = (htab->glink->output_section->vma
+ + htab->glink->output_offset
+ + 8);
+ val -= (htab->glink_eh_frame->output_section->vma
+ + htab->glink_eh_frame->output_offset);
+ val -= p - htab->glink_eh_frame->contents;
+ if (val + 0x80000000 > 0xffffffff)
+ {
+ info->callbacks->einfo
+ (_("%s offset too large for .eh_frame sdata4 encoding"),
+ htab->glink->name);
+ return FALSE;
+ }
+ bfd_put_32 (htab->elf.dynobj, val, p);
+ p += 4;
+ /* .glink size. */
+ bfd_put_32 (htab->elf.dynobj, htab->glink->rawsize - 8, p);
+ p += 4;
+ /* Augmentation. */
+ p += 1;
+
+ *p++ = DW_CFA_advance_loc + 1;
+ *p++ = DW_CFA_register;
+ *p++ = 65;
+ *p++ = 12;
+ *p++ = DW_CFA_advance_loc + 4;
+ *p++ = DW_CFA_restore_extended;
+ *p++ = 65;
+ }
+ htab->glink_eh_frame->size = p - htab->glink_eh_frame->contents;
+ }
+
/* Build the stubs as directed by the stub hash table. */
bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
}
if (stub_sec != NULL
- || htab->glink->rawsize != htab->glink->size)
+ || htab->glink->rawsize != htab->glink->size
+ || (htab->glink_eh_frame != NULL
+ && htab->glink_eh_frame->rawsize != htab->glink_eh_frame->size))
{
htab->stub_error = TRUE;
info->callbacks->einfo (_("stubs don't match calculated size\n"));
NULL))
return FALSE;
+
+ if (htab->glink_eh_frame != NULL
+ && htab->glink_eh_frame->sec_info_type == ELF_INFO_TYPE_EH_FRAME
+ && !_bfd_elf_write_section_eh_frame (output_bfd, info,
+ htab->glink_eh_frame,
+ htab->glink_eh_frame->contents))
+ return FALSE;
+
/* We need to handle writing out multiple GOT sections ourselves,
since we didn't add them to DYNOBJ. We know dynobj is the first
bfd. */
projects / deliverable / binutils-gdb.git / blobdiff