@@ -859,7 +859,7 @@ do
bfd_elf32_xtensa_be_vec) tb="$tb xtensa-isa.lo xtensa-modules.lo elf32-xtensa.lo elf32.lo $elf" ;;
bfd_elf64_alpha_freebsd_vec) tb="$tb elf64-alpha.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_alpha_vec) tb="$tb elf64-alpha.lo elf64.lo $elf"; target_size=64 ;;
- bfd_elf64_bigaarch64_vec) tb="$tb elf64-aarch64.lo elf64.lo $elf"; target_size=64 ;;
+ bfd_elf64_bigaarch64_vec) tb="$tb elf64-aarch64.lo elf-ifunc.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_big_generic_vec) tb="$tb elf64-gen.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_bigmips_vec) tb="$tb elf64-mips.lo elf64.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo"; target_size=64 ;;
bfd_elf64_hppa_linux_vec) tb="$tb elf64-hppa.lo elf64.lo $elf"; target_size=64 ;;
@@ -868,7 +868,7 @@ do
bfd_elf64_ia64_hpux_big_vec) tb="$tb elf64-ia64.lo elfxx-ia64.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_ia64_little_vec) tb="$tb elf64-ia64.lo elfxx-ia64.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_ia64_vms_vec) tb="$tb elf64-ia64-vms.lo elf64-ia64.lo elfxx-ia64.lo elf64.lo vms-lib.lo vms-misc.lo $elf"; target_size=64 ;;
- bfd_elf64_littleaarch64_vec)tb="$tb elf64-aarch64.lo elf64.lo $elf"; target_size=64 ;;
+ bfd_elf64_littleaarch64_vec)tb="$tb elf64-aarch64.lo elf-ifunc.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_little_generic_vec) tb="$tb elf64-gen.lo elf64.lo $elf"; target_size=64 ;;
bfd_elf64_littlemips_vec) tb="$tb elf64-mips.lo elf64.lo elfxx-mips.lo elf-vxworks.lo elf32.lo $elf ecofflink.lo"; target_size=64 ;;
bfd_elf64_mmix_vec) tb="$tb elf64-mmix.lo elf64.lo $elf" target_size=64 ;;
@@ -142,6 +142,7 @@
#include "bfd_stdint.h"
#include "elf-bfd.h"
#include "bfdlink.h"
+#include "objalloc.h"
#include "elf/aarch64.h"
static bfd_reloc_status_type
@@ -398,6 +399,20 @@ static reloc_howto_type elf64_aarch64_howto_dynrelocs[] =
ALL_ONES, /* dst_mask */
FALSE), /* pcrel_offset */
+ HOWTO (R_AARCH64_IRELATIVE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 64, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_AARCH64_IRELATIVE", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ ALL_ONES, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
};
/* Note: code such as elf64_aarch64_reloc_type_lookup expect to use e.g.
@@ -1864,6 +1879,15 @@ struct elf64_aarch64_link_hash_table
loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
indicates an offset is not allocated. */
bfd_vma dt_tlsdesc_got;
+
+ /* Used by local STT_GNU_IFUNC symbols. */
+ htab_t loc_hash_table;
+ void * loc_hash_memory;
+
+ /* The index of the next R_AARCH64_JUMP_SLOT entry in .rela.plt. */
+ bfd_vma next_jump_slot_index;
+ /* The index of the next R_AARCH64_IRELATIVE entry in .rela.plt. */
+ bfd_vma next_irelative_index;
};
@@ -1973,6 +1997,72 @@ stub_hash_newfunc (struct bfd_hash_entry *entry,
return entry;
}
+/* Compute a hash of a local hash entry. We use elf_link_hash_entry
+ for local symbol so that we can handle local STT_GNU_IFUNC symbols
+ as global symbol. We reuse indx and dynstr_index for local symbol
+ hash since they aren't used by global symbols in this backend. */
+
+static hashval_t
+elf_aarch64_local_htab_hash (const void *ptr)
+{
+ struct elf_link_hash_entry *h
+ = (struct elf_link_hash_entry *) ptr;
+ return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
+}
+
+/* Compare local hash entries. */
+
+static int
+elf_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
+{
+ struct elf_link_hash_entry *h1
+ = (struct elf_link_hash_entry *) ptr1;
+ struct elf_link_hash_entry *h2
+ = (struct elf_link_hash_entry *) ptr2;
+
+ return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
+}
+
+/* Find and/or create a hash entry for local symbol. */
+
+static struct elf_link_hash_entry *
+elf_aarch64_get_local_sym_hash (struct elf64_aarch64_link_hash_table *htab,
+ bfd *abfd, const Elf_Internal_Rela *rel,
+ bfd_boolean create)
+{
+ struct elf64_aarch64_link_hash_entry e, *ret;
+ asection *sec = abfd->sections;
+ hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
+ ELF32_R_SYM (rel->r_info));
+ void **slot;
+
+ e.root.indx = sec->id;
+ e.root.dynstr_index = ELF32_R_SYM (rel->r_info);
+ slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
+ create ? INSERT : NO_INSERT);
+
+ if (!slot)
+ return NULL;
+
+ if (*slot)
+ {
+ ret = (struct elf64_aarch64_link_hash_entry *) *slot;
+ return &ret->root;
+ }
+
+ ret = (struct elf64_aarch64_link_hash_entry *)
+ objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
+ sizeof (struct elf64_aarch64_link_hash_entry));
+ if (ret)
+ {
+ memset (ret, 0, sizeof (*ret));
+ ret->root.indx = sec->id;
+ ret->root.dynstr_index = ELF32_R_SYM (rel->r_info);
+ ret->root.dynindx = -1;
+ *slot = ret;
+ }
+ return &ret->root;
+}
/* Copy the extra info we tack onto an elf_link_hash_entry. */
@@ -2062,6 +2152,17 @@ elf64_aarch64_link_hash_table_create (bfd *abfd)
return NULL;
}
+ ret->loc_hash_table = htab_try_create (1024,
+ elf_aarch64_local_htab_hash,
+ elf_aarch64_local_htab_eq,
+ NULL);
+ ret->loc_hash_memory = objalloc_create ();
+ if (!ret->loc_hash_table || !ret->loc_hash_memory)
+ {
+ free (ret);
+ return NULL;
+ }
+
return &ret->root.root;
}
@@ -2073,6 +2174,11 @@ elf64_aarch64_hash_table_free (struct bfd_link_hash_table *hash)
struct elf64_aarch64_link_hash_table *ret
= (struct elf64_aarch64_link_hash_table *) hash;
+ if (ret->loc_hash_table)
+ htab_delete (ret->loc_hash_table);
+ if (ret->loc_hash_memory)
+ objalloc_free ((struct objalloc *) ret->loc_hash_memory);
+
bfd_hash_table_free (&ret->stub_hash_table);
_bfd_elf_link_hash_table_free (hash);
}
@@ -3770,8 +3876,10 @@ elf64_aarch64_final_link_relocate (reloc_howto_type *howto,
struct elf_link_hash_entry *h,
bfd_boolean *unresolved_reloc_p,
bfd_boolean save_addend,
- bfd_vma *saved_addend)
+ bfd_vma *saved_addend,
+ Elf_Internal_Sym *sym)
{
+ Elf_Internal_Shdr *symtab_hdr;
unsigned int r_type = howto->type;
unsigned long r_symndx;
bfd_byte *hit_data = contents + rel->r_offset;
@@ -3782,6 +3890,8 @@ elf64_aarch64_final_link_relocate (reloc_howto_type *howto,
globals = elf64_aarch64_hash_table (info);
+ symtab_hdr = &elf_symtab_hdr (input_bfd);
+
BFD_ASSERT (is_aarch64_elf (input_bfd));
r_symndx = ELF64_R_SYM (rel->r_info);
@@ -3803,6 +3913,181 @@ elf64_aarch64_final_link_relocate (reloc_howto_type *howto,
weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
: bfd_is_und_section (sym_sec));
+
+ /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
+ it here if it is defined in a non-shared object. */
+ if (h != NULL
+ && h->type == STT_GNU_IFUNC
+ && h->def_regular)
+ {
+ asection *plt;
+ const char *name;
+ asection *base_got;
+ bfd_vma off;
+
+ if ((input_section->flags & SEC_ALLOC) == 0
+ || h->plt.offset == (bfd_vma) -1)
+ abort ();
+
+ /* STT_GNU_IFUNC symbol must go through PLT. */
+ plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
+ value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
+
+ switch (r_type)
+ {
+ default:
+ if (h->root.root.string)
+ name = h->root.root.string;
+ else
+ name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
+ NULL);
+ (*_bfd_error_handler)
+ (_("%B: relocation %s against STT_GNU_IFUNC "
+ "symbol `%s' isn't handled by %s"), input_bfd,
+ howto->name, name, __FUNCTION__);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+
+ case R_AARCH64_ABS64:
+ if (rel->r_addend != 0)
+ {
+ if (h->root.root.string)
+ name = h->root.root.string;
+ else
+ name = bfd_elf_sym_name (input_bfd, symtab_hdr,
+ sym, NULL);
+ (*_bfd_error_handler)
+ (_("%B: relocation %s against STT_GNU_IFUNC "
+ "symbol `%s' has non-zero addend: %d"),
+ input_bfd, howto->name, name, rel->r_addend);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ /* Generate dynamic relocation only when there is a
+ non-GOT reference in a shared object. */
+ if (info->shared && h->non_got_ref)
+ {
+ Elf_Internal_Rela outrel;
+ asection *sreloc;
+
+ /* Need a dynamic relocation to get the real function
+ address. */
+ outrel.r_offset = _bfd_elf_section_offset (output_bfd,
+ info,
+ input_section,
+ rel->r_offset);
+ if (outrel.r_offset == (bfd_vma) -1
+ || outrel.r_offset == (bfd_vma) -2)
+ abort ();
+
+ outrel.r_offset += (input_section->output_section->vma
+ + input_section->output_offset);
+
+ if (h->dynindx == -1
+ || h->forced_local
+ || info->executable)
+ {
+ /* This symbol is resolved locally. */
+ outrel.r_info = ELF64_R_INFO (0, R_AARCH64_IRELATIVE);
+ outrel.r_addend = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ }
+ else
+ {
+ outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
+ outrel.r_addend = 0;
+ }
+
+ sreloc = globals->root.irelifunc;
+ elf_append_rela (output_bfd, sreloc, &outrel);
+
+ /* If this reloc is against an external symbol, we
+ do not want to fiddle with the addend. Otherwise,
+ we need to include the symbol value so that it
+ becomes an addend for the dynamic reloc. For an
+ internal symbol, we have updated addend. */
+ return bfd_reloc_ok;
+ }
+ /* FALLTHROUGH */
+ case R_AARCH64_JUMP26:
+ case R_AARCH64_CALL26:
+ return _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset, value,
+ signed_addend);
+ case R_AARCH64_LD64_GOT_LO12_NC:
+ case R_AARCH64_ADR_GOT_PAGE:
+ case R_AARCH64_GOT_LD_PREL19:
+ base_got = globals->root.sgot;
+ off = h->got.offset;
+
+ if (base_got == NULL)
+ abort ();
+
+ if (off == (bfd_vma) -1)
+ {
+ bfd_vma plt_index;
+
+ /* We can't use h->got.offset here to save state, or
+ even just remember the offset, as finish_dynamic_symbol
+ would use that as offset into .got. */
+
+ if (globals->root.splt != NULL)
+ {
+ plt_index = h->plt.offset / globals->plt_entry_size - 1;
+ off = (plt_index + 3) * GOT_ENTRY_SIZE;
+ base_got = globals->root.sgotplt;
+ }
+ else
+ {
+ plt_index = h->plt.offset / globals->plt_entry_size;
+ off = plt_index * GOT_ENTRY_SIZE;
+ base_got = globals->root.igotplt;
+ }
+
+ if (h->dynindx == -1
+ || h->forced_local
+ || info->symbolic)
+ {
+ /* This references the local defitionion. We must
+ initialize this entry in the global offset table.
+ Since the offset must always be a multiple of 8,
+ we use the least significant bit to record
+ whether we have initialized it already.
+
+ When doing a dynamic link, we create a .rela.got
+ relocation entry to initialize the value. This
+ is done in the finish_dynamic_symbol routine. */
+ if ((off & 1) != 0)
+ off &= ~1;
+ else
+ {
+ bfd_put_64 (output_bfd, value,
+ base_got->contents + off);
+ /* Note that this is harmless for the GOTPLT64
+ case, as -1 | 1 still is -1. */
+ h->got.offset |= 1;
+ }
+ }
+ value = (base_got->output_section->vma
+ + base_got->output_offset + off);
+ }
+ else
+ value = aarch64_calculate_got_entry_vma (h, globals, info,
+ value, output_bfd,
+ unresolved_reloc_p);
+ value = aarch64_resolve_relocation (r_type, place, value,
+ 0, weak_undef_p);
+ return _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset, value,
+ signed_addend);
+ case R_AARCH64_ADR_PREL_PG_HI21:
+ case R_AARCH64_ADD_ABS_LO12_NC:
+ break;
+ }
+ }
+
switch (r_type)
{
case R_AARCH64_NONE:
@@ -3829,11 +4114,6 @@ elf64_aarch64_final_link_relocate (reloc_howto_type *howto,
*unresolved_reloc_p = FALSE;
- sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd,
- input_section, 1);
- if (sreloc == NULL)
- return bfd_reloc_notsupported;
-
skip = FALSE;
relocate = FALSE;
@@ -3870,10 +4150,14 @@ elf64_aarch64_final_link_relocate (reloc_howto_type *howto,
outrel.r_addend += value;
}
- loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (htab);
+ sreloc = elf_section_data (input_section)->sreloc;
+ if (sreloc == NULL || sreloc->contents == NULL)
+ return bfd_reloc_notsupported;
+
+ loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size)
+ if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
{
/* Sanity to check that we have previously allocated
sufficient space in the relocation section for the
@@ -4284,6 +4568,20 @@ elf64_aarch64_relocate_section (bfd *output_bfd,
}
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+
+ /* Relocate against local STT_GNU_IFUNC symbol. */
+ if (!info->relocatable
+ && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
+ {
+ h = elf_aarch64_get_local_sym_hash (globals, input_bfd,
+ rel, FALSE);
+ if (h == NULL)
+ abort ();
+
+ /* Set STT_GNU_IFUNC symbol value. */
+ h->root.u.def.value = sym->st_value;
+ h->root.u.def.section = sec;
+ }
}
else
{
@@ -4373,7 +4671,7 @@ elf64_aarch64_relocate_section (bfd *output_bfd,
input_section, contents, rel,
relocation, info, sec,
h, &unresolved_reloc,
- save_addend, &addend);
+ save_addend, &addend, sym);
switch (r_type)
{
@@ -4850,38 +5148,46 @@ elf64_aarch64_gc_sweep_hook (bfd *abfd,
struct elf_link_hash_entry *h = NULL;
r_symndx = ELF64_R_SYM (rel->r_info);
-
if (r_symndx >= symtab_hdr->sh_info)
{
- struct elf64_aarch64_link_hash_entry *eh;
- struct elf_dyn_relocs **pp;
- struct elf_dyn_relocs *p;
-
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
while (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
- eh = (struct elf64_aarch64_link_hash_entry *) h;
-
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
- {
- if (p->sec == sec)
- {
- /* Everything must go for SEC. */
- *pp = p->next;
- break;
- }
- }
}
else
{
+ /* A local symbol. */
Elf_Internal_Sym *isym;
- /* A local symbol. */
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
abfd, r_symndx);
- if (isym == NULL)
- return FALSE;
+
+ /* Check relocation against local STT_GNU_IFUNC symbol. */
+ if (isym != NULL
+ && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ {
+ h = elf_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
+ if (h == NULL)
+ abort ();
+ }
+ }
+
+ if (h)
+ {
+ struct elf64_aarch64_link_hash_entry *eh;
+ struct elf_dyn_relocs **pp;
+ struct elf_dyn_relocs *p;
+
+ eh = (struct elf64_aarch64_link_hash_entry *) h;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
+ if (p->sec == sec)
+ {
+ /* Everything must go for SEC. */
+ *pp = p->next;
+ break;
+ }
}
r_type = ELF64_R_TYPE (rel->r_info);
@@ -4910,6 +5216,12 @@ elf64_aarch64_gc_sweep_hook (bfd *abfd,
{
if (h->got.refcount > 0)
h->got.refcount -= 1;
+
+ if (h->type == STT_GNU_IFUNC)
+ {
+ if (h->plt.refcount > 0)
+ h->plt.refcount -= 1;
+ }
}
else if (locals != NULL)
{
@@ -4940,7 +5252,7 @@ elf64_aarch64_gc_sweep_hook (bfd *abfd,
break;
case R_AARCH64_ABS64:
- if (h != NULL && info->executable)
+ if (h != NULL)
{
if (h->plt.refcount > 0)
h->plt.refcount -= 1;
@@ -4971,12 +5283,13 @@ elf64_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later,
when we know the address of the .got section. */
- if (h->type == STT_FUNC || h->needs_plt)
+ if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
{
if (h->plt.refcount <= 0
- || SYMBOL_CALLS_LOCAL (info, h)
- || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak))
+ || (h->type != STT_GNU_IFUNC
+ && (SYMBOL_CALLS_LOCAL (info, h)
+ || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak))))
{
/* This case can occur if we saw a CALL26 reloc in
an input file, but the symbol wasn't referred to
@@ -5105,6 +5418,7 @@ elf64_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
struct elf_link_hash_entry *h;
unsigned long r_symndx;
unsigned int r_type;
+ Elf_Internal_Sym *isym;
r_symndx = ELF64_R_SYM (rel->r_info);
r_type = ELF64_R_TYPE (rel->r_info);
@@ -5117,7 +5431,31 @@ elf64_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
}
if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
+ {
+ /* A local symbol. */
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ return FALSE;
+
+ /* Check relocation against local STT_GNU_IFUNC symbol. */
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ {
+ h = elf_aarch64_get_local_sym_hash (htab, abfd, rel,
+ TRUE);
+ if (h == NULL)
+ return FALSE;
+
+ /* Fake a STT_GNU_IFUNC symbol. */
+ h->type = STT_GNU_IFUNC;
+ h->def_regular = 1;
+ h->ref_regular = 1;
+ h->forced_local = 1;
+ h->root.type = bfd_link_hash_defined;
+ }
+ else
+ h = NULL;
+ }
else
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
@@ -5130,6 +5468,37 @@ elf64_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
h->root.non_ir_ref = 1;
}
+ if (h != NULL)
+ {
+ /* Create the ifunc sections for static executables. If we
+ never see an indirect function symbol nor we are building
+ a static executable, those sections will be empty and
+ won't appear in output. */
+ switch (r_type)
+ {
+ default:
+ break;
+
+ case R_AARCH64_ABS64:
+ case R_AARCH64_CALL26:
+ case R_AARCH64_JUMP26:
+ case R_AARCH64_LD64_GOT_LO12_NC:
+ case R_AARCH64_ADR_GOT_PAGE:
+ case R_AARCH64_GOT_LD_PREL19:
+ case R_AARCH64_ADR_PREL_PG_HI21:
+ case R_AARCH64_ADD_ABS_LO12_NC:
+ if (htab->root.dynobj == NULL)
+ htab->root.dynobj = abfd;
+ if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
+ return FALSE;
+ break;
+ }
+
+ /* It is referenced by a non-shared object. */
+ h->ref_regular = 1;
+ h->root.non_ir_ref = 1;
+ }
+
/* Could be done earlier, if h were already available. */
r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
@@ -5191,7 +5560,6 @@ elf64_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
asection *s;
void **vpp;
- Elf_Internal_Sym *isym;
isym = bfd_sym_from_r_symndx (&htab->sym_cache,
abfd, r_symndx);
@@ -5341,7 +5709,10 @@ elf64_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
continue;
h->needs_plt = 1;
- h->plt.refcount += 1;
+ if (h->plt.refcount <= 0)
+ h->plt.refcount = 1;
+ else
+ h->plt.refcount += 1;
break;
}
}
@@ -5485,14 +5856,14 @@ elf64_aarch64_find_inliner_info (bfd *abfd,
static void
elf64_aarch64_post_process_headers (bfd *abfd,
- struct bfd_link_info *link_info
- ATTRIBUTE_UNUSED)
+ struct bfd_link_info *link_info)
{
Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
i_ehdrp = elf_elfheader (abfd);
- i_ehdrp->e_ident[EI_OSABI] = 0;
i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
+
+ _bfd_elf_set_osabi (abfd, link_info);
}
static enum elf_reloc_type_class
@@ -5884,12 +6255,6 @@ elf64_aarch64_bfd_free_cached_info (bfd *abfd)
return _bfd_free_cached_info (abfd);
}
-static bfd_boolean
-elf64_aarch64_is_function_type (unsigned int type)
-{
- return type == STT_FUNC;
-}
-
/* Create dynamic sections. This is different from the ARM backend in that
the got, plt, gotplt and their relocation sections are all created in the
standard part of the bfd elf backend. */
@@ -5956,7 +6321,18 @@ elf64_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
info = (struct bfd_link_info *) inf;
htab = elf64_aarch64_hash_table (info);
- if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
+ eh = (struct elf64_aarch64_link_hash_entry *) h;
+
+ /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
+ here if it is defined and referenced in a non-shared object. */
+ if (h->type == STT_GNU_IFUNC
+ && h->def_regular)
+ return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
+ &eh->dyn_relocs,
+ htab->plt_entry_size,
+ htab->plt_header_size,
+ GOT_ENTRY_SIZE);
+ else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
@@ -6027,7 +6403,6 @@ elf64_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
h->needs_plt = 0;
}
- eh = (struct elf64_aarch64_link_hash_entry *) h;
eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
if (h->got.refcount > 0)
@@ -6212,6 +6587,24 @@ elf64_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
}
+/* Allocate space in .plt, .got and associated reloc sections for
+ local dynamic relocs. */
+
+static bfd_boolean
+elf_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
+{
+ struct elf_link_hash_entry *h
+ = (struct elf_link_hash_entry *) *slot;
+
+ if (h->type != STT_GNU_IFUNC
+ || !h->def_regular
+ || !h->ref_regular
+ || !h->forced_local
+ || h->root.type != bfd_link_hash_defined)
+ abort ();
+
+ return elf64_aarch64_allocate_dynrelocs (h, inf);
+}
/* This is the most important function of all . Innocuosly named
@@ -6351,6 +6744,10 @@ elf64_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
elf_link_hash_traverse (&htab->root, elf64_aarch64_allocate_dynrelocs,
info);
+ /* Allocate .plt and .got entries, and space for local symbols. */
+ htab_traverse (htab->loc_hash_table,
+ elf_aarch64_allocate_local_dynrelocs,
+ info);
/* For every jump slot reserved in the sgotplt, reloc_count is
incremented. However, when we reserve space for TLS descriptors,
@@ -6359,7 +6756,12 @@ elf64_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
slot size. */
if (htab->root.srelplt)
- htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
+ {
+ htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
+ htab->next_irelative_index = htab->root.srelplt->reloc_count - 1;
+ }
+ else if (htab->root.irelplt)
+ htab->next_irelative_index = htab->root.irelplt->reloc_count - 1;
if (htab->tlsdesc_plt)
{
@@ -6506,7 +6908,8 @@ elf64_aarch64_update_plt_entry (bfd *output_bfd,
static void
elf64_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
struct elf64_aarch64_link_hash_table
- *htab, bfd *output_bfd)
+ *htab, bfd *output_bfd,
+ struct bfd_link_info *info)
{
bfd_byte *plt_entry;
bfd_vma plt_index;
@@ -6515,17 +6918,50 @@ elf64_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
bfd_vma plt_entry_address;
Elf_Internal_Rela rela;
bfd_byte *loc;
+ asection *plt, *gotplt, *relplt;
- plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
+ /* When building a static executable, use .iplt, .igot.plt and
+ .rela.iplt sections for STT_GNU_IFUNC symbols. */
+ if (htab->root.splt != NULL)
+ {
+ plt = htab->root.splt;
+ gotplt = htab->root.sgotplt;
+ relplt = htab->root.srelplt;
+ }
+ else
+ {
+ plt = htab->root.iplt;
+ gotplt = htab->root.igotplt;
+ relplt = htab->root.irelplt;
+ }
- /* Offset in the GOT is PLT index plus got GOT headers(3)
- times 8. */
- got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
- plt_entry = htab->root.splt->contents + h->plt.offset;
- plt_entry_address = htab->root.splt->output_section->vma
- + htab->root.splt->output_section->output_offset + h->plt.offset;
- gotplt_entry_address = htab->root.sgotplt->output_section->vma +
- htab->root.sgotplt->output_offset + got_offset;
+ /* Get the index in the procedure linkage table which
+ corresponds to this symbol. This is the index of this symbol
+ in all the symbols for which we are making plt entries. The
+ first entry in the procedure linkage table is reserved.
+
+ Get the offset into the .got table of the entry that
+ corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
+ bytes. The first three are reserved for the dynamic linker.
+
+ For static executables, we don't reserve anything. */
+
+ if (plt == htab->root.splt)
+ {
+ got_offset = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
+ got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
+ }
+ else
+ {
+ got_offset = h->plt.offset / htab->plt_entry_size;
+ got_offset = got_offset * GOT_ENTRY_SIZE;
+ }
+
+ plt_entry = plt->contents + h->plt.offset;
+ plt_entry_address = plt->output_section->vma
+ + plt->output_section->output_offset + h->plt.offset;
+ gotplt_entry_address = gotplt->output_section->vma +
+ gotplt->output_offset + got_offset;
/* Copy in the boiler-plate for the PLTn entry. */
memcpy (plt_entry, elf64_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
@@ -6549,19 +6985,38 @@ elf64_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
/* All the GOTPLT Entries are essentially initialized to PLT0. */
bfd_put_64 (output_bfd,
- (htab->root.splt->output_section->vma
- + htab->root.splt->output_offset),
- htab->root.sgotplt->contents + got_offset);
+ plt->output_section->vma + plt->output_offset,
+ gotplt->contents + got_offset);
- /* Fill in the entry in the .rela.plt section. */
rela.r_offset = gotplt_entry_address;
- rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_JUMP_SLOT);
- rela.r_addend = 0;
+
+ if (h->dynindx == -1
+ || ((info->executable
+ || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
+ && h->def_regular
+ && h->type == STT_GNU_IFUNC))
+ {
+ /* If an STT_GNU_IFUNC symbol is locally defined, generate
+ R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
+ rela.r_info = ELF64_R_INFO (0, R_AARCH64_IRELATIVE);
+ rela.r_addend = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ /* R_AARCH64_IRELATIVE comes last. */
+ plt_index = htab->next_irelative_index--;
+ }
+ else
+ {
+ /* Fill in the entry in the .rela.plt section. */
+ rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_JUMP_SLOT);
+ rela.r_addend = 0;
+ plt_index = htab->next_jump_slot_index++;
+ }
/* Compute the relocation entry to used based on PLT index and do
not adjust reloc_count. The reloc_count has already been adjusted
to account for this entry. */
- loc = htab->root.srelplt->contents + plt_index * RELOC_SIZE (htab);
+ loc = relplt->contents + plt_index * RELOC_SIZE (htab);
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
@@ -6621,15 +7076,38 @@ elf64_aarch64_finish_dynamic_symbol (bfd *output_bfd,
if (h->plt.offset != (bfd_vma) - 1)
{
+ asection *plt, *gotplt, *relplt;
+
/* This symbol has an entry in the procedure linkage table. Set
it up. */
- if (h->dynindx == -1
- || htab->root.splt == NULL
- || htab->root.sgotplt == NULL || htab->root.srelplt == NULL)
+ /* When building a static executable, use .iplt, .igot.plt and
+ .rela.iplt sections for STT_GNU_IFUNC symbols. */
+ if (htab->root.splt != NULL)
+ {
+ plt = htab->root.splt;
+ gotplt = htab->root.sgotplt;
+ relplt = htab->root.srelplt;
+ }
+ else
+ {
+ plt = htab->root.iplt;
+ gotplt = htab->root.igotplt;
+ relplt = htab->root.irelplt;
+ }
+
+ /* This symbol has an entry in the procedure linkage table. Set
+ it up. */
+ if ((h->dynindx == -1
+ && !((h->forced_local || info->executable)
+ && h->def_regular
+ && h->type == STT_GNU_IFUNC))
+ || plt == NULL
+ || gotplt == NULL
+ || relplt == NULL)
abort ();
- elf64_aarch64_create_small_pltn_entry (h, htab, output_bfd);
+ elf64_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
if (!h->def_regular)
{
/* Mark the symbol as undefined, rather than as defined in
@@ -6714,6 +7192,21 @@ elf64_aarch64_finish_dynamic_symbol (bfd *output_bfd,
return TRUE;
}
+/* Finish up local dynamic symbol handling. We set the contents of
+ various dynamic sections here. */
+
+static bfd_boolean
+elf_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
+{
+ struct elf_link_hash_entry *h
+ = (struct elf_link_hash_entry *) *slot;
+ struct bfd_link_info *info
+ = (struct bfd_link_info *) inf;
+
+ return elf64_aarch64_finish_dynamic_symbol (info->output_bfd,
+ info, h, NULL);
+}
+
static void
elf64_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
struct elf64_aarch64_link_hash_table
@@ -6956,6 +7449,11 @@ elf64_aarch64_finish_dynamic_sections (bfd *output_bfd,
elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
= GOT_ENTRY_SIZE;
+ /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
+ htab_traverse (htab->loc_hash_table,
+ elf_aarch64_finish_local_dynamic_symbol,
+ info);
+
return TRUE;
}
@@ -6969,6 +7467,24 @@ elf64_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
}
+/* Hook called by the linker routine which adds symbols from an object
+ file. */
+
+static bfd_boolean
+elf64_aarch64_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
+ Elf_Internal_Sym *sym,
+ const char **namep ATTRIBUTE_UNUSED,
+ flagword *flagsp ATTRIBUTE_UNUSED,
+ asection **secp ATTRIBUTE_UNUSED,
+ bfd_vma *valp ATTRIBUTE_UNUSED)
+{
+ if ((abfd->flags & DYNAMIC) == 0
+ && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
+ || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
+ elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
+
+ return TRUE;
+}
/* We use this so we can override certain functions
(though currently we don't). */
@@ -7075,9 +7591,6 @@ const struct elf_size_info elf64_aarch64_size_info =
#define elf_backend_init_index_section \
_bfd_elf_init_2_index_sections
-#define elf_backend_is_function_type \
- elf64_aarch64_is_function_type
-
#define elf_backend_finish_dynamic_sections \
elf64_aarch64_finish_dynamic_sections
@@ -7117,6 +7630,9 @@ const struct elf_size_info elf64_aarch64_size_info =
#define elf_backend_size_info \
elf64_aarch64_size_info
+#define elf_backend_add_symbol_hook \
+ elf64_aarch64_add_symbol_hook
+
#define elf_backend_can_refcount 1
#define elf_backend_can_gc_sections 1
#define elf_backend_plt_readonly 1
@@ -208,7 +208,8 @@ RELOC_NUMBER (R_AARCH64_TLS_DTPMOD64, 1028)
RELOC_NUMBER (R_AARCH64_TLS_DTPREL64, 1029)
RELOC_NUMBER (R_AARCH64_TLS_TPREL64, 1030)
RELOC_NUMBER (R_AARCH64_TLSDESC, 1031)
-FAKE_RELOC (R_AARCH64_dyn_max, 1032)
+RELOC_NUMBER (R_AARCH64_IRELATIVE, 1032)
+FAKE_RELOC (R_AARCH64_dyn_max, 1033)
END_RELOC_NUMBERS (R_AARCH64_end)
@@ -114,3 +114,43 @@ run_dump_test "gc-tls-relocs"
run_dump_test "gc-plt-relocs"
run_dump_test "gc-relocs-257-dyn"
run_dump_test "gc-relocs-257"
+
+# ifunc tests
+run_dump_test "ifunc-1"
+run_dump_test "ifunc-1-local"
+run_dump_test "ifunc-2"
+run_dump_test "ifunc-2-local"
+run_dump_test "ifunc-3a"
+run_dump_test "ifunc-3b"
+run_dump_test "ifunc-4"
+run_dump_test "ifunc-4a"
+run_dump_test "ifunc-5a"
+run_dump_test "ifunc-5b"
+run_dump_test "ifunc-5a-local"
+run_dump_test "ifunc-5b-local"
+run_dump_test "ifunc-5r-local"
+run_dump_test "ifunc-6a"
+run_dump_test "ifunc-6b"
+run_dump_test "ifunc-7a"
+run_dump_test "ifunc-7b"
+run_dump_test "ifunc-8"
+run_dump_test "ifunc-9"
+run_dump_test "ifunc-10"
+run_dump_test "ifunc-11"
+run_dump_test "ifunc-12"
+run_dump_test "ifunc-13"
+run_dump_test "ifunc-14a"
+run_dump_test "ifunc-14b"
+run_dump_test "ifunc-14c"
+run_dump_test "ifunc-14d"
+run_dump_test "ifunc-14e"
+run_dump_test "ifunc-14f"
+run_dump_test "ifunc-15"
+run_dump_test "ifunc-16"
+run_dump_test "ifunc-17a"
+run_dump_test "ifunc-17b"
+run_dump_test "ifunc-18a"
+run_dump_test "ifunc-18b"
+run_dump_test "ifunc-19a"
+run_dump_test "ifunc-19b"
+run_dump_test "ifunc-20"
new file mode 100644
@@ -0,0 +1,7 @@
+#ld: -shared
+#objdump: -dw
+#target: aarch64-*-*
+
+#...
+[ \t0-9a-f]+:[ \t0-9a-f]+bl[ \t0-9a-f]+<\*ABS\*\+0x2a0@plt>
+#pass
new file mode 100644
@@ -0,0 +1,13 @@
+ .type foo, %gnu_indirect_function
+ .set __GI_foo, foo
+ .text
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+.globl bar
+ .type bar, @function
+bar:
+ bl __GI_foo
+ ret
+ .size bar, .-bar
new file mode 100644
@@ -0,0 +1,7 @@
+#ld: -shared
+#objdump: -dw
+#target: aarch64-*-*
+
+#...
+[ \t0-9a-f]+:[ \t0-9a-f]+bl[ \t0-9a-f]+<\*ABS\*\+0x2c0@plt>
+#pass
new file mode 100644
@@ -0,0 +1,16 @@
+ .type foo, %gnu_indirect_function
+ .global __GI_foo
+ .hidden __GI_foo
+ .set __GI_foo, foo
+ .text
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+.globl bar
+ .type bar, @function
+bar:
+ bl __GI_foo
+ ret
+ .size bar, .-bar
new file mode 100644
@@ -0,0 +1,5 @@
+#ld: -e bar --gc-sections
+#readelf: -r --wide
+#target: aarch64-*-*
+
+There are no relocations in this file.
new file mode 100644
@@ -0,0 +1,25 @@
+ .section .text.foo,"ax",@progbits
+ .type foo, @function
+foo:
+ .global foo
+ adrp x0, :got:ifunc
+ ldr x0, [x0, #:got_lo12:ifunc]
+ bl ifunc
+ adrp x0, xxx
+ add x0, x0, :lo12:xxx
+ ret
+
+ .section .text.bar,"ax",@progbits
+ .type bar, @function
+bar:
+ .global bar
+ ret
+
+ .section .text.ifunc,"ax",@progbits
+ .type ifunc, @gnu_indirect_function
+ifunc:
+ ret
+
+ .section .data.foo,"aw",@progbits
+xxx:
+ .quad ifunc
new file mode 100644
@@ -0,0 +1,5 @@
+#ld: -e bar --gc-sections
+#readelf: -r --wide
+#target: aarch64-*-*
+
+There are no relocations in this file.
new file mode 100644
@@ -0,0 +1,26 @@
+ .section .text.foo,"ax",@progbits
+ .type foo, @function
+foo:
+ .global foo
+ adrp x0, :got:ifunc
+ ldr x0, [x0, #:got_lo12:ifunc]
+ bl ifunc
+ adrp x0, xxx
+ add x0, x0, :lo12:xxx
+ ret
+
+ .section .text.bar,"ax",@progbits
+ .type bar, @function
+bar:
+ .global bar
+ ret
+
+ .section .text.ifunc,"ax",@progbits
+ .type ifunc, @gnu_indirect_function
+ .global ifunc
+ifunc:
+ ret
+
+ .section .data.foo,"aw",@progbits
+xxx:
+ .quad ifunc
new file mode 100644
@@ -0,0 +1,5 @@
+#ld: -shared -e bar --gc-sections
+#readelf: -r --wide
+#target: aarch64-*-*
+
+There are no relocations in this file.
new file mode 100644
@@ -0,0 +1,24 @@
+ .section .text.foo,"ax",@progbits
+ .type foo, @function
+foo:
+ adrp x0, :got:ifunc
+ ldr x0, [x0, #:got_lo12:ifunc]
+ bl ifunc
+ adrp x0, xxx
+ add x0, x0, :lo12:xxx
+ ret
+
+ .section .text.bar,"ax",@progbits
+ .type bar, @function
+bar:
+ .global bar
+ ret
+
+ .section .text.ifunc,"ax",@progbits
+ .type ifunc, @gnu_indirect_function
+ifunc:
+ ret
+
+ .section .data.foo,"aw",@progbits
+xxx:
+ .quad ifunc
new file mode 100644
@@ -0,0 +1,13 @@
+#source: ifunc-13a.s
+#source: ifunc-13b.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.ifunc' at offset 0x[0-9a-f]+ contains 1 entries:
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_ABS64[ ]+ifunc\(\)[ ]+ifunc \+ 0
+
+Relocation section '.rela.plt' at offset 0x[0-9a-f]+ contains 1 entries:
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_JUMP_SLOT[ ]+ifunc\(\)[ ]+ifunc \+ 0
new file mode 100644
@@ -0,0 +1,11 @@
+ .text
+ .type foo, @function
+ .global foo
+foo:
+ adrp x0, xxx
+ add x0, x0, :lo12:xxx
+ ret
+
+ .data
+xxx:
+ .quad ifunc
new file mode 100644
@@ -0,0 +1,5 @@
+ .text
+ .type ifunc, @gnu_indirect_function
+ .globl ifunc
+ifunc:
+ ret
new file mode 100644
@@ -0,0 +1,10 @@
+#source: ifunc-14a.s
+#source: ifunc-14b.s
+#ld: -shared -z nocombreloc
+#readelf: -d
+#target: aarch64-*-*
+
+#failif
+#...
+.*\(TEXTREL\).*
+#...
new file mode 100644
@@ -0,0 +1,7 @@
+ .text
+ .globl bar
+ .type bar, @function
+bar:
+ bl foo
+ .size bar, .-bar
+ .hidden foo
new file mode 100644
@@ -0,0 +1,10 @@
+#source: ifunc-14b.s
+#source: ifunc-14a.s
+#ld: -shared -z nocombreloc
+#readelf: -d
+#target: aarch64-*-*
+
+#failif
+#...
+.*\(TEXTREL\).*
+#...
new file mode 100644
@@ -0,0 +1,5 @@
+ .type foo, %gnu_indirect_function
+ .globl foo
+foo:
+ ret
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,10 @@
+#source: ifunc-14a.s
+#source: ifunc-14b.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+#failif
+#...
+.* +R_AARCH64_NONE +.*
+#...
new file mode 100644
@@ -0,0 +1,7 @@
+ .text
+ .globl xxx
+ .type xxx, @function
+xxx:
+ bl foo
+ .size xxx, .-xxx
+ .hidden foo
new file mode 100644
@@ -0,0 +1,10 @@
+#source: ifunc-14b.s
+#source: ifunc-14a.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+#failif
+#...
+.* +R_AARCH64_NONE +.*
+#...
new file mode 100644
@@ -0,0 +1,11 @@
+#source: ifunc-14a.s
+#source: ifunc-14c.s
+#source: ifunc-14b.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+#failif
+#...
+.* +R_AARCH64_NONE +.*
+#...
new file mode 100644
@@ -0,0 +1,11 @@
+#source: ifunc-14a.s
+#source: ifunc-14b.s
+#source: ifunc-14c.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+#failif
+#...
+.* +R_AARCH64_NONE +.*
+#...
new file mode 100644
@@ -0,0 +1,12 @@
+#source: ifunc-15.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.got' at offset 0x[0-9a-f]+ contains 1 entries:
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_GLOB_DAT[ ]+ifunc\(\)[ ]+ifunc \+ 0
+
+Relocation section '.rela.plt' at offset 0x[0-9a-f]+ contains 1 entries:
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_JUMP_SLOT[ ]+ifunc\(\)[ ]+ifunc \+ 0
new file mode 100644
@@ -0,0 +1,11 @@
+ .text
+ .type foo, @function
+ .global foo
+foo:
+ adrp x0, :got:ifunc
+ ldr x0, [x0, #:got_lo12:ifunc]
+ ret
+ .type ifunc, @gnu_indirect_function
+ .globl ifunc
+ifunc:
+ ret
new file mode 100644
@@ -0,0 +1,9 @@
+#source: ifunc-16.s
+#ld: -shared
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_JUMP_SLOT[ ]+0+[ ]+ifunc \+ 0
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,17 @@
+ .text
+ .globl fct
+ .type fct, @gnu_indirect_function
+ .set fct,resolve
+ .hidden int_fct
+ .globl int_fct
+ .set int_fct,fct
+ .p2align 4,,15
+ .type resolve, @function
+resolve:
+ bl ifunc
+ .size resolve, .-resolve
+ .globl g
+ .type g, @function
+g:
+ bl int_fct
+ .size g, .-g
new file mode 100644
@@ -0,0 +1,9 @@
+#source: ifunc-17a.s
+#source: ifunc-17b.s
+#ld: -static
+#readelf: -s --wide
+#target: aarch64-*-*
+
+#...
+ +[0-9]+: +[0-9a-f]+ +4 +OBJECT +GLOBAL +DEFAULT +[1-9] foo
+#pass
new file mode 100644
@@ -0,0 +1,11 @@
+ .globl main
+ .globl start
+ .globl _start
+ .globl __start
+ .text
+main:
+start:
+_start:
+__start:
+ .byte 0
+ .common foo,4,4
new file mode 100644
@@ -0,0 +1,9 @@
+#source: ifunc-17b.s
+#source: ifunc-17a.s
+#ld: -static
+#readelf: -s --wide
+#target: aarch64-*-*
+
+#...
+ +[0-9]+: +[0-9a-f]+ +4 +OBJECT +GLOBAL +DEFAULT +[1-9] foo
+#pass
new file mode 100644
@@ -0,0 +1,6 @@
+ .weak foo
+ .type foo, %gnu_indirect_function
+ .size foo,1
+ .text
+foo:
+ .byte 1
new file mode 100644
@@ -0,0 +1,14 @@
+#source: ifunc-18a.s
+#source: ifunc-18b.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.ifunc' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,5 @@
+ .section .data.rel,"aw",@progbits
+ .globl foo_ptrt
+ .type foo_ptr, @object
+foo_ptr:
+ .dc.a foo
new file mode 100644
@@ -0,0 +1,14 @@
+#source: ifunc-18b.s
+#source: ifunc-18a.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.ifunc' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,15 @@
+ .text
+ .type foo, %gnu_indirect_function
+ .hidden foo
+ .globl foo
+foo:
+ ret
+ .size foo, .-foo
+ .globl bar
+bar:
+ bl foo1
+ ret
+ .size bar, .-bar
+ .hidden foo1
+ .globl foo1
+ foo1 = foo
new file mode 100644
@@ -0,0 +1,13 @@
+#source: ifunc-19a.s
+#source: ifunc-19b.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.ifunc' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,5 @@
+ .section .data.rel,"aw",@progbits
+ .globl foo_ptrt
+ .type foo_ptr, @object
+foo_ptr:
+ .dc.a foo1
new file mode 100644
@@ -0,0 +1,13 @@
+#source: ifunc-19b.s
+#source: ifunc-19a.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.ifunc' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,15 @@
+ .text
+ .type foo, %gnu_indirect_function
+ .hidden foo
+ .globl foo
+foo:
+ ret
+ .size foo, .-foo
+ .globl bar
+bar:
+ bl foo1
+ ret
+ .size bar, .-bar
+ .hidden foo1
+ .globl foo1
+ foo1 = foo
new file mode 100644
@@ -0,0 +1,9 @@
+#ld: -shared
+#objdump: -dw
+#target: aarch64-*-*
+
+#...
+[ \t0-9a-f]+:[ \t0-9a-f]+bl[ \t0-9a-f]+<\*ABS\*\+0x2c0@plt>
+[ \t0-9a-f]+:[ \t0-9a-f]+adrp[ \t]+x0, 0 <_GLOBAL_OFFSET_TABLE_>
+[ \t0-9a-f]+:[ \t0-9a-f]+add[ \t]+x0, x0, #0x2b0
+#pass
new file mode 100644
@@ -0,0 +1,18 @@
+ .type foo, %gnu_indirect_function
+ .global __GI_foo
+ .hidden __GI_foo
+ .set __GI_foo, foo
+ .text
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+.globl bar
+ .type bar, @function
+bar:
+ bl __GI_foo
+ adrp x0, __GI_foo
+ add x0, x0, :lo12:__GI_foo
+ ret
+ .size bar, .-bar
new file mode 100644
@@ -0,0 +1,9 @@
+#ld: -shared
+#objdump: -dw
+#target: aarch64-*-*
+
+#...
+[ \t0-9a-f]+:[ \t0-9a-f]+bl[ \t0-9a-f]+<\*ABS\*\+0x2c0@plt>
+[ \t0-9a-f]+:[ \t0-9a-f]+adrp[ \t]+x0, 0 <_GLOBAL_OFFSET_TABLE_>
+[ \t0-9a-f]+:[ \t0-9a-f]+add[ \t]+x0, x0, #0x2b0
+#pass
new file mode 100644
@@ -0,0 +1,18 @@
+ .type foo, %gnu_indirect_function
+ .global __GI_foo
+ .hidden __GI_foo
+ .set __GI_foo, foo
+ .text
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+.globl bar
+ .type bar, @function
+bar:
+ bl __GI_foo
+ adrp x0, __GI_foo
+ add x0, x0, :lo12:__GI_foo
+ ret
+ .size bar, .-bar
new file mode 100644
@@ -0,0 +1,12 @@
+#source: ifunc-20.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.ifunc' at offset 0x[0-9a-f]+ contains 1 entries:
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_ABS64[ ]+ifunc\(\)[ ]+ifunc \+ 0
+
+Relocation section '.rela.plt' at offset 0x[0-9a-f]+ contains 1 entries:
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_JUMP_SLOT[ ]+ifunc\(\)[ ]+ifunc \+ 0
new file mode 100644
@@ -0,0 +1,16 @@
+ .section .data.rel,"aw",@progbits
+ .globl ifunc_ptrt
+ .type ifunc_ptr, @object
+ifunc_ptr:
+ .dc.a ifunc
+ .text
+ .type ifunc, @gnu_indirect_function
+ .globl ifunc
+ifunc:
+ ret
+ .size ifunc, .-ifunc
+ .type bar, @function
+ .globl bar
+bar:
+ bl ifunc
+ .size bar, .-bar
new file mode 100644
@@ -0,0 +1,16 @@
+ .type foo, %gnu_indirect_function
+ .global __GI_foo
+ .protected __GI_foo
+ .set __GI_foo, foo
+ .text
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+.globl bar
+ .type bar, @function
+bar:
+ bl __GI_foo
+ ret
+ .size bar, .-bar
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-3.s
+#ld: -shared
+#objdump: -dw
+#target: aarch64-*-*
+
+#...
+[ \t0-9a-f]+:[ \t0-9a-f]+bl[ \t0-9a-f]+<\*ABS\*\+0x2e0@plt>
+#pass
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-3.s
+#ld: -shared
+#readelf: -r --wide
+#target: aarch64-*-*
+
+#...
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_[_0-9A-Z]+_IRELATIVE[ ]*[0-9a-f]*
+#pass
new file mode 100644
@@ -0,0 +1,7 @@
+#ld:
+#readelf: -r --wide
+#target: aarch64-*-*
+
+#...
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_[_0-9A-Z]+_IRELATIVE[ ]*[0-9a-f]*
+#pass
new file mode 100644
@@ -0,0 +1,18 @@
+ .text
+ .type foo, %gnu_indirect_function
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+ .type start,"function"
+ .global start
+start:
+ .type _start,"function"
+ .global _start
+_start:
+ .type __start,"function"
+ .global __start
+__start:
+ .type __start,"function"
+ bl foo
new file mode 100644
@@ -0,0 +1,8 @@
+#ld: -s
+#readelf: -r --wide
+#target: aarch64-*-*
+#source: ifunc-4.s
+
+#...
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_[_0-9A-Z]+_IRELATIVE[ ]*[0-9a-f]*
+#pass
new file mode 100644
@@ -0,0 +1,19 @@
+ .text
+ .type foo, %gnu_indirect_function
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+ .type start,"function"
+ .global start
+start:
+ .type _start,"function"
+ .global _start
+_start:
+ .type __start,"function"
+ .global __start
+__start:
+ .type __start,"function"
+ bl foo
+ adrp x0, :got:foo
+ ldr x0, [x0, #:got_lo12:foo]
new file mode 100644
@@ -0,0 +1,20 @@
+ .text
+ .type foo, %gnu_indirect_function
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+ .type start,"function"
+ .global start
+start:
+ .type _start,"function"
+ .global _start
+_start:
+ .type __start,"function"
+ .global __start
+__start:
+ .type __start,"function"
+ bl foo
+ adrp x0, :got:foo
+ ldr x0, [x0, #:got_lo12:foo]
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-5-local.s
+#ld:
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-5.s
+#ld:
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-5-local.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,12 @@
+#source: ifunc-5.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.got' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_GLOB_DAT[ ]+foo\(\)[ ]+foo \+ 0
+#...
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_JUMP_SLOT[ ]+foo\(\)[ ]+foo \+ 0
new file mode 100644
@@ -0,0 +1,10 @@
+#source: ifunc-5-local.s
+#ld: -r
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.text' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_CALL26[ ]+foo\(\)[ ]+foo \+ 0
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_ADR_GOT_PAGE[ ]+foo\(\)[ ]+foo \+ 0
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_LD64_GOT_LO1[ ]+foo\(\)[ ]+foo \+ 0
new file mode 100644
@@ -0,0 +1,21 @@
+ .text
+ .type foo, %gnu_indirect_function
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+ .protected foo
+ .type start,"function"
+ .global start
+start:
+ .type _start,"function"
+ .global _start
+_start:
+ .type __start,"function"
+ .global __start
+__start:
+ .type __start,"function"
+ bl foo
+ adrp x0, :got:foo
+ ldr x0, [x0, #:got_lo12:foo]
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-6.s
+#ld:
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,12 @@
+#source: ifunc-6.s
+#ld: -shared -z nocombreloc
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.got' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_GLOB_DAT[ ]+foo\(\)[ ]+foo \+ 0
+#...
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,21 @@
+ .text
+ .type foo, %gnu_indirect_function
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+ .hidden foo
+ .type start,"function"
+ .global start
+start:
+ .type _start,"function"
+ .global _start
+_start:
+ .type __start,"function"
+ .global __start
+__start:
+ .type __start,"function"
+ bl foo
+ adrp x0, :got:foo
+ ldr x0, [x0, #:got_lo12:foo]
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-7.s
+#ld:
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,8 @@
+#source: ifunc-7.s
+#ld: -shared
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,9 @@
+#source: ifunc-8a.s
+#source: ifunc-8b.s
+#ld:
+#readelf: -r --wide
+#target: aarch64-*-*
+
+Relocation section '.rela.plt' at .*
+[ ]+Offset[ ]+Info[ ]+Type[ ]+.*
+[0-9a-f]+[ ]+[0-9a-f]+[ ]+R_AARCH64_IRELATIVE[ ]+[0-9a-f]*
new file mode 100644
@@ -0,0 +1,13 @@
+ .text
+ .type start,"function"
+ .global start
+start:
+ .type _start,"function"
+ .global _start
+_start:
+ .type __start,"function"
+ .global __start
+__start:
+ .type __start,"function"
+ adrp x0, :got:foo
+ ldr x0, [x0, #:got_lo12:foo]
new file mode 100644
@@ -0,0 +1,7 @@
+ .text
+ .type foo, %gnu_indirect_function
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,3 @@
+#ld: --export-dynamic
+#error: .*dynamic STT_GNU_IFUNC symbol `foo' with pointer equality in `.*.o' can not be used when making an executable; recompile with -fPIE and relink with -pie
+#target: aarch64-*-*
new file mode 100644
@@ -0,0 +1,23 @@
+ .text
+ .type foo, %gnu_indirect_function
+.globl foo
+ .type foo, @function
+foo:
+ ret
+ .size foo, .-foo
+ .type start,"function"
+ .global start
+start:
+ .type _start,"function"
+ .global _start
+_start:
+ .type __start,"function"
+ .global __start
+__start:
+ .type __start,"function"
+ adrp x0, .LANCHOR0
+ add x0, x0, :lo12:.LANCHOR0
+ .data
+ .align 3
+.LANCHOR0 = . + 0
+ .xword foo
@@ -24,10 +24,11 @@
# IFUNC support has only been implemented for the ix86, x86_64, powerpc,
-# and sparc so far.
+# aarch64 and sparc so far.
if {!(([istarget "i?86-*-*"]
|| [istarget "x86_64-*-*"]
|| [istarget "powerpc*-*-*"]
+ || [istarget "aarch64-*-*"]
|| [istarget "sparc*-*-*"])
&& ([istarget "*-*-elf*"]
|| [istarget "*-*-nacl*"]