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| author | Richard Sandiford <rdsandiford@googlemail.com> | 2011-03-14 16:04:16 +0000 |
|---|---|---|
| committer | Richard Sandiford <rdsandiford@googlemail.com> | 2011-03-14 16:04:16 +0000 |
| commit | 34e77a920a469734b88c8efc79be94be955b1029 (patch) | |
| tree | 83a796ef19a5269c293abd09afccf046af7ae53a /bfd/elf32-arm.c | |
| parent | 37b50a69d65e0c5176fd454436569504d3152f1d (diff) | |
| download | gdb-34e77a920a469734b88c8efc79be94be955b1029.zip gdb-34e77a920a469734b88c8efc79be94be955b1029.tar.gz gdb-34e77a920a469734b88c8efc79be94be955b1029.tar.bz2 | |
include/elf/
* arm.h (R_ARM_IRELATIVE): New relocation.
bfd/
* reloc.c (BFD_RELOC_ARM_IRELATIVE): New relocation.
* bfd-in2.h: Regenerate.
* elf32-arm.c (elf32_arm_howto_table_2): Rename existing definition
to elf32_arm_howto_table_3 and replace with a single R_ARM_IRELATIVE
entry.
(elf32_arm_howto_from_type): Update accordingly.
(elf32_arm_reloc_map): Map BFD_RELOC_ARM_IRELATIVE to R_ARM_IRELATIVE.
(elf32_arm_reloc_name_lookup): Handle elf32_arm_howto_table_3.
(arm_plt_info): New structure, split out from elf32_arm_link_hash_entry
with an extra noncall_refcount field.
(arm_local_iplt_info): New structure.
(elf_arm_obj_tdata): Add local_iplt.
(elf32_arm_local_iplt): New accessor macro.
(elf32_arm_link_hash_entry): Replace plt_thumb_refcount,
plt_maybe_thumb_refcount and plt_got_offset with an arm_plt_info.
Change tls_type to a bitfield and add is_iplt.
(elf32_arm_link_hash_newfunc): Update accordingly.
(elf32_arm_allocate_local_sym_info): New function.
(elf32_arm_create_local_iplt): Likewise.
(elf32_arm_get_plt_info): Likewise.
(elf32_arm_plt_needs_thumb_stub_p): Likewise.
(elf32_arm_get_local_dynreloc_list): Likewise.
(create_ifunc_sections): Likewise.
(elf32_arm_copy_indirect_symbol): Update after the changes to
elf32_arm_link_hash_entry. Assert the is_iplt has not yet been set.
(arm_type_of_stub): Add an st_type argument. Use elf32_arm_get_plt_info
to get PLT information. Assert that all STT_GNU_IFUNC references
are turned into PLT references.
(arm_build_one_stub): Pass the symbol type to
elf32_arm_final_link_relocate.
(elf32_arm_size_stubs): Pass the symbol type to arm_type_of_stub.
(elf32_arm_allocate_irelocs): New function.
(elf32_arm_add_dynreloc): In static objects, use .rel.iplt for
all R_ARM_IRELATIVE.
(elf32_arm_allocate_plt_entry): New function.
(elf32_arm_populate_plt_entry): Likewise.
(elf32_arm_final_link_relocate): Add an st_type parameter.
Set srelgot to null for static objects. Use separate variables
to record which st_value and st_type should be used when generating
a dynamic relocation. Use elf32_arm_get_plt_info to find the
symbol's PLT information, setting has_iplt_entry, splt,
plt_offset and gotplt_offset accordingly. Check whether
STT_GNU_IFUNC symbols should resolve to an .iplt entry, and change
the relocation target accordingly. Broaden assert to include
.iplts. Don't set sreloc for static relocations. Assert that
we only generate dynamic R_ARM_RELATIVE relocations for R_ARM_ABS32
and R_ARM_ABS32_NOI. Generate R_ARM_IRELATIVE relocations instead
of R_ARM_RELATIVE relocations if the target is an STT_GNU_IFUNC
symbol. Pass the symbol type to arm_type_of_stub. Conditionally
resolve GOT references to the .igot.plt entry.
(elf32_arm_relocate_section): Update the call to
elf32_arm_final_link_relocate.
(elf32_arm_gc_sweep_hook): Use elf32_arm_get_plt_info to get PLT
information. Treat R_ARM_REL32 and R_ARM_REL32_NOI as call
relocations in shared libraries and relocatable executables.
Count non-call PLT references. Use elf32_arm_get_local_dynreloc_list
to get the list of dynamic relocations for a local symbol.
(elf32_arm_check_relocs): Always create ifunc sections. Set isym
at the same time as setting h. Use elf32_arm_allocate_local_sym_info
to allocate local symbol information. Treat R_ARM_REL32 and
R_ARM_REL32_NOI as call relocations in shared libraries and
relocatable executables. Record PLT information for local
STT_GNU_IFUNC functions as well as global functions. Count
non-call PLT references. Use elf32_arm_get_local_dynreloc_list
to get the list of dynamic relocations for a local symbol.
(elf32_arm_adjust_dynamic_symbol): Handle STT_GNU_IFUNC symbols.
Don't remove STT_GNU_IFUNC PLTs unless all references have been
removed. Update after the changes to elf32_arm_link_hash_entry.
(allocate_dynrelocs_for_symbol): Decide whether STT_GNU_IFUNC PLT
entries should live in .plt or .iplt. Check whether the .igot.plt
and .got entries can be combined. Use elf32_arm_allocate_plt_entry
to allocate .plt and .(i)got.plt entries. Detect which .got
entries will need R_ARM_IRELATIVE relocations and use
elf32_arm_allocate_irelocs to allocate them. Likewise other
non-.got dynamic relocations.
(elf32_arm_size_dynamic_sections): Allocate .iplt, .igot.plt
and dynamic relocations for local STT_GNU_IFUNC symbols.
Check whether the .igot.plt and .got entries can be combined.
Detect which .got entries will need R_ARM_IRELATIVE relocations
and use elf32_arm_allocate_irelocs to allocate them. Use stashed
section pointers intead of strcmp checks. Handle iplt and igotplt.
(elf32_arm_finish_dynamic_symbol): Use elf32_arm_populate_plt_entry
to fill in .plt, .got.plt and .rel(a).plt entries. Point
STT_GNU_IFUNC symbols at an .iplt entry if non-call relocations
resolve to it.
(elf32_arm_output_plt_map_1): New function, split out from
elf32_arm_output_plt_map. Handle .iplt entries. Use
elf32_arm_plt_needs_thumb_stub_p.
(elf32_arm_output_plt_map): Call it.
(elf32_arm_output_arch_local_syms): Add mapping symbols for
local .iplt entries.
(elf32_arm_swap_symbol_in): Handle Thumb STT_GNU_IFUNC symbols.
(elf32_arm_swap_symbol_out): Likewise.
(elf32_arm_add_symbol_hook): New function.
(elf_backend_add_symbol_hook): Define for all targets.
opcodes/
* arm-dis.c (get_sym_code_type): Treat STT_GNU_IFUNCs as code.
gas/
* config/tc-arm.c (md_pcrel_from_section): Use S_FORCE_RELOC to
determine whether a relocation is needed.
(md_apply_fix, arm_apply_sym_value): Likewise.
ld/testsuite/
* ld-arm/ifunc-1.s, ld-arm/ifunc-1.dd, ld-arm/ifunc-1.gd,
ld-arm/ifunc-1.rd, ld-arm/ifunc-2.s, ld-arm/ifunc-2.dd,
ld-arm/ifunc-2.gd, ld-arm/ifunc-2.rd, ld-arm/ifunc-3.s,
ld-arm/ifunc-3.dd, ld-arm/ifunc-3.gd, ld-arm/ifunc-3.rd,
ld-arm/ifunc-4.s, ld-arm/ifunc-4.dd, ld-arm/ifunc-4.gd,
ld-arm/ifunc-4.rd, ld-arm/ifunc-5.s, ld-arm/ifunc-5.dd,
ld-arm/ifunc-5.gd, ld-arm/ifunc-5.rd, ld-arm/ifunc-6.s,
ld-arm/ifunc-6.dd, ld-arm/ifunc-6.gd, ld-arm/ifunc-6.rd,
ld-arm/ifunc-7.s, ld-arm/ifunc-7.dd, ld-arm/ifunc-7.gd,
ld-arm/ifunc-7.rd, ld-arm/ifunc-8.s, ld-arm/ifunc-8.dd,
ld-arm/ifunc-8.gd, ld-arm/ifunc-8.rd, ld-arm/ifunc-9.s,
ld-arm/ifunc-9.dd, ld-arm/ifunc-9.gd, ld-arm/ifunc-9.rd,
ld-arm/ifunc-10.s, ld-arm/ifunc-10.dd, ld-arm/ifunc-10.gd,
ld-arm/ifunc-10.rd, ld-arm/ifunc-11.s, ld-arm/ifunc-11.dd,
ld-arm/ifunc-11.gd, ld-arm/ifunc-11.rd, ld-arm/ifunc-12.s,
ld-arm/ifunc-12.dd, ld-arm/ifunc-12.gd, ld-arm/ifunc-12.rd,
ld-arm/ifunc-13.s, ld-arm/ifunc-13.dd, ld-arm/ifunc-13.gd,
ld-arm/ifunc-13.rd, ld-arm/ifunc-14.s, ld-arm/ifunc-14.dd,
ld-arm/ifunc-14.gd, ld-arm/ifunc-14.rd, ld-arm/ifunc-15.s,
ld-arm/ifunc-15.dd, ld-arm/ifunc-15.gd, ld-arm/ifunc-15.rd,
ld-arm/ifunc-16.s, ld-arm/ifunc-16.dd, ld-arm/ifunc-16.gd,
ld-arm/ifunc-16.rd, ld-arm/ifunc-dynamic.ld,
ld-arm/ifunc-static.ld: New tests.
* ld-arm/farcall-group.d, ld-arm/farcall-group-size2.d,
ld-arm/farcall-mixed-lib-v4t.d, ld-arm/farcall-mixed-lib.d: Update
for new stub hashes.
* ld-arm/arm-elf.exp: Run them.
Diffstat (limited to 'bfd/elf32-arm.c')
| -rw-r--r-- | bfd/elf32-arm.c | 1593 |
1 files changed, 1125 insertions, 468 deletions
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c index 9f2b696..6b69fd6 100644 --- a/bfd/elf32-arm.c +++ b/bfd/elf32-arm.c @@ -1651,6 +1651,7 @@ static reloc_howto_type elf32_arm_howto_table_1[] = 0x00000fff, /* dst_mask */ FALSE), /* pcrel_offset */ + /* 112-127 private relocations. */ EMPTY_HOWTO (112), EMPTY_HOWTO (113), EMPTY_HOWTO (114), @@ -1667,6 +1668,8 @@ static reloc_howto_type elf32_arm_howto_table_1[] = EMPTY_HOWTO (125), EMPTY_HOWTO (126), EMPTY_HOWTO (127), + + /* R_ARM_ME_TOO, obsolete. */ EMPTY_HOWTO (128), HOWTO (R_ARM_THM_TLS_DESCSEQ, /* type */ @@ -1684,13 +1687,26 @@ static reloc_howto_type elf32_arm_howto_table_1[] = FALSE), /* pcrel_offset */ }; -/* 112-127 private relocations - 128 R_ARM_ME_TOO, obsolete - 129-255 unallocated in AAELF. - - 249-255 extended, currently unused, relocations: */ +/* 160 onwards: */ +static reloc_howto_type elf32_arm_howto_table_2[1] = +{ + HOWTO (R_ARM_IRELATIVE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_IRELATIVE", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE) /* pcrel_offset */ +}; -static reloc_howto_type elf32_arm_howto_table_2[4] = +/* 249-255 extended, currently unused, relocations: */ +static reloc_howto_type elf32_arm_howto_table_3[4] = { HOWTO (R_ARM_RREL32, /* type */ 0, /* rightshift */ @@ -1755,9 +1771,12 @@ elf32_arm_howto_from_type (unsigned int r_type) if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1)) return &elf32_arm_howto_table_1[r_type]; + if (r_type == R_ARM_IRELATIVE) + return &elf32_arm_howto_table_2[r_type - R_ARM_IRELATIVE]; + if (r_type >= R_ARM_RREL32 - && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_2)) - return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32]; + && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_3)) + return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32]; return NULL; } @@ -1827,6 +1846,7 @@ static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32}, {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32}, {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32}, + {BFD_RELOC_ARM_IRELATIVE, R_ARM_IRELATIVE}, {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT}, {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY}, {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC}, @@ -1897,6 +1917,11 @@ elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0) return &elf32_arm_howto_table_2[i]; + for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_3); i++) + if (elf32_arm_howto_table_3[i].name != NULL + && strcasecmp (elf32_arm_howto_table_3[i].name, r_name) == 0) + return &elf32_arm_howto_table_3[i]; + return NULL; } @@ -2550,6 +2575,44 @@ struct a8_erratum_reloc { /* The size of the thread control block. */ #define TCB_SIZE 8 +/* ARM-specific information about a PLT entry, over and above the usual + gotplt_union. */ +struct arm_plt_info { + /* We reference count Thumb references to a PLT entry separately, + so that we can emit the Thumb trampoline only if needed. */ + bfd_signed_vma thumb_refcount; + + /* Some references from Thumb code may be eliminated by BL->BLX + conversion, so record them separately. */ + bfd_signed_vma maybe_thumb_refcount; + + /* How many of the recorded PLT accesses were from non-call relocations. + This information is useful when deciding whether anything takes the + address of an STT_GNU_IFUNC PLT. A value of 0 means that all + non-call references to the function should resolve directly to the + real runtime target. */ + unsigned int noncall_refcount; + + /* Since PLT entries have variable size if the Thumb prologue is + used, we need to record the index into .got.plt instead of + recomputing it from the PLT offset. */ + bfd_signed_vma got_offset; +}; + +/* Information about an .iplt entry for a local STT_GNU_IFUNC symbol. */ +struct arm_local_iplt_info { + /* The information that is usually found in the generic ELF part of + the hash table entry. */ + union gotplt_union root; + + /* The information that is usually found in the ARM-specific part of + the hash table entry. */ + struct arm_plt_info arm; + + /* A list of all potential dynamic relocations against this symbol. */ + struct elf_dyn_relocs *dyn_relocs; +}; + struct elf_arm_obj_tdata { struct elf_obj_tdata root; @@ -2560,6 +2623,9 @@ struct elf_arm_obj_tdata /* GOTPLT entries for TLS descriptors. */ bfd_vma *local_tlsdesc_gotent; + /* Information for local symbols that need entries in .iplt. */ + struct arm_local_iplt_info **local_iplt; + /* Zero to warn when linking objects with incompatible enum sizes. */ int no_enum_size_warning; @@ -2576,6 +2642,9 @@ struct elf_arm_obj_tdata #define elf32_arm_local_tlsdesc_gotent(bfd) \ (elf_arm_tdata (bfd)->local_tlsdesc_gotent) +#define elf32_arm_local_iplt(bfd) \ + (elf_arm_tdata (bfd)->local_iplt) + #define is_arm_elf(bfd) \ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ && elf_tdata (bfd) != NULL \ @@ -2598,18 +2667,8 @@ struct elf32_arm_link_hash_entry /* Track dynamic relocs copied for this symbol. */ struct elf_dyn_relocs *dyn_relocs; - /* We reference count Thumb references to a PLT entry separately, - so that we can emit the Thumb trampoline only if needed. */ - bfd_signed_vma plt_thumb_refcount; - - /* Some references from Thumb code may be eliminated by BL->BLX - conversion, so record them separately. */ - bfd_signed_vma plt_maybe_thumb_refcount; - - /* Since PLT entries have variable size if the Thumb prologue is - used, we need to record the index into .got.plt instead of - recomputing it from the PLT offset. */ - bfd_signed_vma plt_got_offset; + /* ARM-specific PLT information. */ + struct arm_plt_info plt; #define GOT_UNKNOWN 0 #define GOT_NORMAL 1 @@ -2617,7 +2676,12 @@ struct elf32_arm_link_hash_entry #define GOT_TLS_IE 4 #define GOT_TLS_GDESC 8 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLS_GDESC)) - unsigned char tls_type; + unsigned int tls_type : 8; + + /* True if the symbol's PLT entry is in .iplt rather than .plt. */ + unsigned int is_iplt : 1; + + unsigned int unused : 23; /* Offset of the GOTPLT entry reserved for the TLS descriptor, starting at the end of the jump table. */ @@ -2833,9 +2897,11 @@ elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry, ret->dyn_relocs = NULL; ret->tls_type = GOT_UNKNOWN; ret->tlsdesc_got = (bfd_vma) -1; - ret->plt_thumb_refcount = 0; - ret->plt_maybe_thumb_refcount = 0; - ret->plt_got_offset = -1; + ret->plt.thumb_refcount = 0; + ret->plt.maybe_thumb_refcount = 0; + ret->plt.noncall_refcount = 0; + ret->plt.got_offset = -1; + ret->is_iplt = FALSE; ret->export_glue = NULL; ret->stub_cache = NULL; @@ -2844,6 +2910,142 @@ elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry, return (struct bfd_hash_entry *) ret; } +/* Ensure that we have allocated bookkeeping structures for ABFD's local + symbols. */ + +static bfd_boolean +elf32_arm_allocate_local_sym_info (bfd *abfd) +{ + if (elf_local_got_refcounts (abfd) == NULL) + { + bfd_size_type num_syms; + bfd_size_type size; + char *data; + + num_syms = elf_tdata (abfd)->symtab_hdr.sh_info; + size = num_syms * (sizeof (bfd_signed_vma) + + sizeof (struct arm_local_iplt_info *) + + sizeof (bfd_vma) + + sizeof (char)); + data = bfd_zalloc (abfd, size); + if (data == NULL) + return FALSE; + + elf_local_got_refcounts (abfd) = (bfd_signed_vma *) data; + data += num_syms * sizeof (bfd_signed_vma); + + elf32_arm_local_iplt (abfd) = (struct arm_local_iplt_info **) data; + data += num_syms * sizeof (struct arm_local_iplt_info *); + + elf32_arm_local_tlsdesc_gotent (abfd) = (bfd_vma *) data; + data += num_syms * sizeof (bfd_vma); + + elf32_arm_local_got_tls_type (abfd) = data; + } + return TRUE; +} + +/* Return the .iplt information for local symbol R_SYMNDX, which belongs + to input bfd ABFD. Create the information if it doesn't already exist. + Return null if an allocation fails. */ + +static struct arm_local_iplt_info * +elf32_arm_create_local_iplt (bfd *abfd, unsigned long r_symndx) +{ + struct arm_local_iplt_info **ptr; + + if (!elf32_arm_allocate_local_sym_info (abfd)) + return NULL; + + BFD_ASSERT (r_symndx < elf_tdata (abfd)->symtab_hdr.sh_info); + ptr = &elf32_arm_local_iplt (abfd)[r_symndx]; + if (*ptr == NULL) + *ptr = bfd_zalloc (abfd, sizeof (**ptr)); + return *ptr; +} + +/* Try to obtain PLT information for the symbol with index R_SYMNDX + in ABFD's symbol table. If the symbol is global, H points to its + hash table entry, otherwise H is null. + + Return true if the symbol does have PLT information. When returning + true, point *ROOT_PLT at the target-independent reference count/offset + union and *ARM_PLT at the ARM-specific information. */ + +static bfd_boolean +elf32_arm_get_plt_info (bfd *abfd, struct elf32_arm_link_hash_entry *h, + unsigned long r_symndx, union gotplt_union **root_plt, + struct arm_plt_info **arm_plt) +{ + struct arm_local_iplt_info *local_iplt; + + if (h != NULL) + { + *root_plt = &h->root.plt; + *arm_plt = &h->plt; + return TRUE; + } + + if (elf32_arm_local_iplt (abfd) == NULL) + return FALSE; + + local_iplt = elf32_arm_local_iplt (abfd)[r_symndx]; + if (local_iplt == NULL) + return FALSE; + + *root_plt = &local_iplt->root; + *arm_plt = &local_iplt->arm; + return TRUE; +} + +/* Return true if the PLT described by ARM_PLT requires a Thumb stub + before it. */ + +static bfd_boolean +elf32_arm_plt_needs_thumb_stub_p (struct bfd_link_info *info, + struct arm_plt_info *arm_plt) +{ + struct elf32_arm_link_hash_table *htab; + + htab = elf32_arm_hash_table (info); + return (arm_plt->thumb_refcount != 0 + || (!htab->use_blx && arm_plt->maybe_thumb_refcount != 0)); +} + +/* Return a pointer to the head of the dynamic reloc list that should + be used for local symbol ISYM, which is symbol number R_SYMNDX in + ABFD's symbol table. Return null if an error occurs. */ + +static struct elf_dyn_relocs ** +elf32_arm_get_local_dynreloc_list (bfd *abfd, unsigned long r_symndx, + Elf_Internal_Sym *isym) +{ + if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) + { + struct arm_local_iplt_info *local_iplt; + + local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx); + if (local_iplt == NULL) + return NULL; + return &local_iplt->dyn_relocs; + } + else + { + /* Track dynamic relocs needed for local syms too. + We really need local syms available to do this + easily. Oh well. */ + asection *s; + void *vpp; + + s = bfd_section_from_elf_index (abfd, isym->st_shndx); + if (s == NULL) + abort (); + + vpp = &elf_section_data (s)->local_dynrel; + return (struct elf_dyn_relocs **) vpp; + } +} + /* Initialize an entry in the stub hash table. */ static struct bfd_hash_entry * @@ -2909,6 +3111,53 @@ create_got_section (bfd *dynobj, struct bfd_link_info *info) return TRUE; } +/* Create the .iplt, .rel(a).iplt and .igot.plt sections. */ + +static bfd_boolean +create_ifunc_sections (struct bfd_link_info *info) +{ + struct elf32_arm_link_hash_table *htab; + const struct elf_backend_data *bed; + bfd *dynobj; + asection *s; + flagword flags; + + htab = elf32_arm_hash_table (info); + dynobj = htab->root.dynobj; + bed = get_elf_backend_data (dynobj); + flags = bed->dynamic_sec_flags; + + if (htab->root.iplt == NULL) + { + s = bfd_make_section_with_flags (dynobj, ".iplt", + flags | SEC_READONLY | SEC_CODE); + if (s == NULL + || !bfd_set_section_alignment (abfd, s, bed->plt_alignment)) + return FALSE; + htab->root.iplt = s; + } + + if (htab->root.irelplt == NULL) + { + s = bfd_make_section_with_flags (dynobj, RELOC_SECTION (htab, ".iplt"), + flags | SEC_READONLY); + if (s == NULL + || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) + return FALSE; + htab->root.irelplt = s; + } + + if (htab->root.igotplt == NULL) + { + s = bfd_make_section_with_flags (dynobj, ".igot.plt", flags); + if (s == NULL + || !bfd_set_section_alignment (dynobj, s, bed->s->log_file_align)) + return FALSE; + htab->root.igotplt = s; + } + return TRUE; +} + /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our hash table. */ @@ -3008,10 +3257,16 @@ elf32_arm_copy_indirect_symbol (struct bfd_link_info *info, if (ind->root.type == bfd_link_hash_indirect) { /* Copy over PLT info. */ - edir->plt_thumb_refcount += eind->plt_thumb_refcount; - eind->plt_thumb_refcount = 0; - edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount; - eind->plt_maybe_thumb_refcount = 0; + edir->plt.thumb_refcount += eind->plt.thumb_refcount; + eind->plt.thumb_refcount = 0; + edir->plt.maybe_thumb_refcount += eind->plt.maybe_thumb_refcount; + eind->plt.maybe_thumb_refcount = 0; + edir->plt.noncall_refcount += eind->plt.noncall_refcount; + eind->plt.noncall_refcount = 0; + + /* We should only allocate a function to .iplt once the final + symbol information is known. */ + BFD_ASSERT (!eind->is_iplt); if (dir->got.refcount <= 0) { @@ -3189,6 +3444,7 @@ static enum elf32_arm_stub_type arm_type_of_stub (struct bfd_link_info *info, asection *input_sec, const Elf_Internal_Rela *rel, + unsigned char st_type, enum arm_st_branch_type *actual_branch_type, struct elf32_arm_link_hash_entry *hash, bfd_vma destination, @@ -3205,6 +3461,8 @@ arm_type_of_stub (struct bfd_link_info *info, enum elf32_arm_stub_type stub_type = arm_stub_none; int use_plt = 0; enum arm_st_branch_type branch_type = *actual_branch_type; + union gotplt_union *root_plt; + struct arm_plt_info *arm_plt; if (branch_type == ST_BRANCH_LONG) return stub_type; @@ -3224,27 +3482,42 @@ arm_type_of_stub (struct bfd_link_info *info, r_type = ELF32_R_TYPE (rel->r_info); - /* Keep a simpler condition, for the sake of clarity. */ - if (globals->root.splt != NULL - && hash != NULL - && hash->root.plt.offset != (bfd_vma) -1) + /* For TLS call relocs, it is the caller's responsibility to provide + the address of the appropriate trampoline. */ + if (r_type != R_ARM_TLS_CALL + && r_type != R_ARM_THM_TLS_CALL + && elf32_arm_get_plt_info (input_bfd, hash, ELF32_R_SYM (rel->r_info), + &root_plt, &arm_plt) + && root_plt->offset != (bfd_vma) -1) { - use_plt = 1; - - /* Note when dealing with PLT entries: the main PLT stub is in - ARM mode, so if the branch is in Thumb mode, another - Thumb->ARM stub will be inserted later just before the ARM - PLT stub. We don't take this extra distance into account - here, because if a long branch stub is needed, we'll add a - Thumb->Arm one and branch directly to the ARM PLT entry - because it avoids spreading offset corrections in several - places. */ + asection *splt; - destination = (globals->root.splt->output_section->vma - + globals->root.splt->output_offset - + hash->root.plt.offset); - branch_type = ST_BRANCH_TO_ARM; + if (hash == NULL || hash->is_iplt) + splt = globals->root.iplt; + else + splt = globals->root.splt; + if (splt != NULL) + { + use_plt = 1; + + /* Note when dealing with PLT entries: the main PLT stub is in + ARM mode, so if the branch is in Thumb mode, another + Thumb->ARM stub will be inserted later just before the ARM + PLT stub. We don't take this extra distance into account + here, because if a long branch stub is needed, we'll add a + Thumb->Arm one and branch directly to the ARM PLT entry + because it avoids spreading offset corrections in several + places. */ + + destination = (splt->output_section->vma + + splt->output_offset + + root_plt->offset); + st_type = STT_FUNC; + branch_type = ST_BRANCH_TO_ARM; + } } + /* Calls to STT_GNU_IFUNC symbols should go through a PLT. */ + BFD_ASSERT (st_type != STT_GNU_IFUNC); branch_offset = (bfd_signed_vma)(destination - location); @@ -3640,8 +3913,8 @@ elf32_arm_tls_transition (struct bfd_link_info *info, int r_type, static bfd_reloc_status_type elf32_arm_final_link_relocate (reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *, - const char *, enum arm_st_branch_type, struct elf_link_hash_entry *, - bfd_boolean *, char **); + const char *, unsigned char, enum arm_st_branch_type, + struct elf_link_hash_entry *, bfd_boolean *, char **); static unsigned int arm_stub_required_alignment (enum elf32_arm_stub_type stub_type) @@ -3834,9 +4107,9 @@ arm_build_one_stub (struct bfd_hash_entry *gen_entry, elf32_arm_final_link_relocate (elf32_arm_howto_from_type (template_sequence[stub_reloc_idx[i]].r_type), stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel, - points_to, info, stub_entry->target_section, "", branch_type, - (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc, - &error_message); + points_to, info, stub_entry->target_section, "", STT_FUNC, + branch_type, (struct elf_link_hash_entry *) stub_entry->h, + &unresolved_reloc, &error_message); } else { @@ -3854,7 +4127,7 @@ arm_build_one_stub (struct bfd_hash_entry *gen_entry, elf32_arm_final_link_relocate (elf32_arm_howto_from_type (template_sequence[stub_reloc_idx[i]].r_type), stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel, - points_to, info, stub_entry->target_section, "", + points_to, info, stub_entry->target_section, "", STT_FUNC, stub_entry->branch_type, (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc, &error_message); @@ -4621,6 +4894,7 @@ elf32_arm_size_stubs (bfd *output_bfd, const char *sym_name; char *stub_name; const asection *id_sec; + unsigned char st_type; enum arm_st_branch_type branch_type; bfd_boolean created_stub = FALSE; @@ -4678,6 +4952,7 @@ elf32_arm_size_stubs (bfd *output_bfd, sym_sec = htab->root.splt; sym_value = htab->tls_trampoline; hash = 0; + st_type = STT_FUNC; branch_type = ST_BRANCH_TO_ARM; } else if (!hash) @@ -4719,6 +4994,7 @@ elf32_arm_size_stubs (bfd *output_bfd, destination = (sym_value + irela->r_addend + sym_sec->output_offset + sym_sec->output_section->vma); + st_type = ELF_ST_TYPE (sym->st_info); branch_type = ARM_SYM_BRANCH_TYPE (sym); sym_name = bfd_elf_string_from_elf_section (input_bfd, @@ -4793,6 +5069,7 @@ elf32_arm_size_stubs (bfd *output_bfd, bfd_set_error (bfd_error_bad_value); goto error_ret_free_internal; } + st_type = hash->root.type; branch_type = hash->root.target_internal; sym_name = hash->root.root.root.string; } @@ -4801,8 +5078,8 @@ elf32_arm_size_stubs (bfd *output_bfd, { /* Determine what (if any) linker stub is needed. */ stub_type = arm_type_of_stub (info, section, irela, - &branch_type, hash, - destination, sym_sec, + st_type, &branch_type, + hash, destination, sym_sec, input_bfd, sym_name); if (stub_type == arm_stub_none) break; @@ -6930,6 +7207,26 @@ elf32_arm_allocate_dynrelocs (struct bfd_link_info *info, asection *sreloc, sreloc->size += RELOC_SIZE (htab) * count; } +/* Reserve space for COUNT R_ARM_IRELATIVE relocations. If the link is + dynamic, the relocations should go in SRELOC, otherwise they should + go in the special .rel.iplt section. */ + +static void +elf32_arm_allocate_irelocs (struct bfd_link_info *info, asection *sreloc, + bfd_size_type count) +{ + struct elf32_arm_link_hash_table *htab; + + htab = elf32_arm_hash_table (info); + if (!htab->root.dynamic_sections_created) + htab->root.irelplt->size += RELOC_SIZE (htab) * count; + else + { + BFD_ASSERT (sreloc != NULL); + sreloc->size += RELOC_SIZE (htab) * count; + } +} + /* Add relocation REL to the end of relocation section SRELOC. */ static void @@ -6940,6 +7237,9 @@ elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info, struct elf32_arm_link_hash_table *htab; htab = elf32_arm_hash_table (info); + if (!htab->root.dynamic_sections_created + && ELF32_R_TYPE (rel->r_info) == R_ARM_IRELATIVE) + sreloc = htab->root.irelplt; if (sreloc == NULL) abort (); loc = sreloc->contents; @@ -6949,6 +7249,281 @@ elf32_arm_add_dynreloc (bfd *output_bfd, struct bfd_link_info *info, SWAP_RELOC_OUT (htab) (output_bfd, rel, loc); } +/* Allocate room for a PLT entry described by ROOT_PLT and ARM_PLT. + IS_IPLT_ENTRY says whether the entry belongs to .iplt rather than + to .plt. */ + +static void +elf32_arm_allocate_plt_entry (struct bfd_link_info *info, + bfd_boolean is_iplt_entry, + union gotplt_union *root_plt, + struct arm_plt_info *arm_plt) +{ + struct elf32_arm_link_hash_table *htab; + asection *splt; + asection *sgotplt; + + htab = elf32_arm_hash_table (info); + + if (is_iplt_entry) + { + splt = htab->root.iplt; + sgotplt = htab->root.igotplt; + + /* Allocate room for an R_ARM_IRELATIVE relocation in .rel.iplt. */ + elf32_arm_allocate_irelocs (info, htab->root.irelplt, 1); + } + else + { + splt = htab->root.splt; + sgotplt = htab->root.sgotplt; + + /* Allocate room for an R_JUMP_SLOT relocation in .rel.plt. */ + elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1); + + /* If this is the first .plt entry, make room for the special + first entry. */ + if (splt->size == 0) + splt->size += htab->plt_header_size; + } + + /* Allocate the PLT entry itself, including any leading Thumb stub. */ + if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt)) + splt->size += PLT_THUMB_STUB_SIZE; + root_plt->offset = splt->size; + splt->size += htab->plt_entry_size; + + if (!htab->symbian_p) + { + /* We also need to make an entry in the .got.plt section, which + will be placed in the .got section by the linker script. */ + arm_plt->got_offset = sgotplt->size - 8 * htab->num_tls_desc; + sgotplt->size += 4; + } +} + +/* Fill in a PLT entry and its associated GOT slot. If DYNINDX == -1, + the entry lives in .iplt and resolves to (*SYM_VALUE)(). + Otherwise, DYNINDX is the index of the symbol in the dynamic + symbol table and SYM_VALUE is undefined. + + ROOT_PLT points to the offset of the PLT entry from the start of its + section (.iplt or .plt). ARM_PLT points to the symbol's ARM-specific + bookkeeping information. */ + +static void +elf32_arm_populate_plt_entry (bfd *output_bfd, struct bfd_link_info *info, + union gotplt_union *root_plt, + struct arm_plt_info *arm_plt, + int dynindx, bfd_vma sym_value) +{ + struct elf32_arm_link_hash_table *htab; + asection *sgot; + asection *splt; + asection *srel; + bfd_byte *loc; + bfd_vma plt_index; + Elf_Internal_Rela rel; + bfd_vma plt_header_size; + bfd_vma got_header_size; + + htab = elf32_arm_hash_table (info); + + /* Pick the appropriate sections and sizes. */ + if (dynindx == -1) + { + splt = htab->root.iplt; + sgot = htab->root.igotplt; + srel = htab->root.irelplt; + + /* There are no reserved entries in .igot.plt, and no special + first entry in .iplt. */ + got_header_size = 0; + plt_header_size = 0; + } + else + { + splt = htab->root.splt; + sgot = htab->root.sgotplt; + srel = htab->root.srelplt; + + got_header_size = get_elf_backend_data (output_bfd)->got_header_size; + plt_header_size = htab->plt_header_size; + } + BFD_ASSERT (splt != NULL && srel != NULL); + + /* Fill in the entry in the procedure linkage table. */ + if (htab->symbian_p) + { + BFD_ASSERT (dynindx >= 0); + put_arm_insn (htab, output_bfd, + elf32_arm_symbian_plt_entry[0], + splt->contents + root_plt->offset); + bfd_put_32 (output_bfd, + elf32_arm_symbian_plt_entry[1], + splt->contents + root_plt->offset + 4); + + /* Fill in the entry in the .rel.plt section. */ + rel.r_offset = (splt->output_section->vma + + splt->output_offset + + root_plt->offset + 4); + rel.r_info = ELF32_R_INFO (dynindx, R_ARM_GLOB_DAT); + + /* 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. */ + plt_index = ((root_plt->offset - plt_header_size) + / htab->plt_entry_size); + } + else + { + bfd_vma got_offset, got_address, plt_address; + bfd_vma got_displacement, initial_got_entry; + bfd_byte * ptr; + + BFD_ASSERT (sgot != NULL); + + /* Get the offset into the .(i)got.plt table of the entry that + corresponds to this function. */ + got_offset = (arm_plt->got_offset & -2); + + /* 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. + After the reserved .got.plt entries, all symbols appear in + the same order as in .plt. */ + plt_index = (got_offset - got_header_size) / 4; + + /* Calculate the address of the GOT entry. */ + got_address = (sgot->output_section->vma + + sgot->output_offset + + got_offset); + + /* ...and the address of the PLT entry. */ + plt_address = (splt->output_section->vma + + splt->output_offset + + root_plt->offset); + + ptr = splt->contents + root_plt->offset; + if (htab->vxworks_p && info->shared) + { + unsigned int i; + bfd_vma val; + + for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4) + { + val = elf32_arm_vxworks_shared_plt_entry[i]; + if (i == 2) + val |= got_address - sgot->output_section->vma; + if (i == 5) + val |= plt_index * RELOC_SIZE (htab); + if (i == 2 || i == 5) + bfd_put_32 (output_bfd, val, ptr); + else + put_arm_insn (htab, output_bfd, val, ptr); + } + } + else if (htab->vxworks_p) + { + unsigned int i; + bfd_vma val; + + for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4) + { + val = elf32_arm_vxworks_exec_plt_entry[i]; + if (i == 2) + val |= got_address; + if (i == 4) + val |= 0xffffff & -((root_plt->offset + i * 4 + 8) >> 2); + if (i == 5) + val |= plt_index * RELOC_SIZE (htab); + if (i == 2 || i == 5) + bfd_put_32 (output_bfd, val, ptr); + else + put_arm_insn (htab, output_bfd, val, ptr); + } + + loc = (htab->srelplt2->contents + + (plt_index * 2 + 1) * RELOC_SIZE (htab)); + + /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation + referencing the GOT for this PLT entry. */ + rel.r_offset = plt_address + 8; + rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); + rel.r_addend = got_offset; + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); + loc += RELOC_SIZE (htab); + + /* Create the R_ARM_ABS32 relocation referencing the + beginning of the PLT for this GOT entry. */ + rel.r_offset = got_address; + rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); + rel.r_addend = 0; + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); + } + else + { + /* Calculate the displacement between the PLT slot and the + entry in the GOT. The eight-byte offset accounts for the + value produced by adding to pc in the first instruction + of the PLT stub. */ + got_displacement = got_address - (plt_address + 8); + + BFD_ASSERT ((got_displacement & 0xf0000000) == 0); + + if (elf32_arm_plt_needs_thumb_stub_p (info, arm_plt)) + { + put_thumb_insn (htab, output_bfd, + elf32_arm_plt_thumb_stub[0], ptr - 4); + put_thumb_insn (htab, output_bfd, + elf32_arm_plt_thumb_stub[1], ptr - 2); + } + + put_arm_insn (htab, output_bfd, + elf32_arm_plt_entry[0] + | ((got_displacement & 0x0ff00000) >> 20), + ptr + 0); + put_arm_insn (htab, output_bfd, + elf32_arm_plt_entry[1] + | ((got_displacement & 0x000ff000) >> 12), + ptr+ 4); + put_arm_insn (htab, output_bfd, + elf32_arm_plt_entry[2] + | (got_displacement & 0x00000fff), + ptr + 8); +#ifdef FOUR_WORD_PLT + bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12); +#endif + } + + /* Fill in the entry in the .rel(a).(i)plt section. */ + rel.r_offset = got_address; + rel.r_addend = 0; + if (dynindx == -1) + { + /* .igot.plt entries use IRELATIVE relocations against SYM_VALUE. + The dynamic linker or static executable then calls SYM_VALUE + to determine the correct run-time value of the .igot.plt entry. */ + rel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE); + initial_got_entry = sym_value; + } + else + { + rel.r_info = ELF32_R_INFO (dynindx, R_ARM_JUMP_SLOT); + initial_got_entry = (splt->output_section->vma + + splt->output_offset); + } + + /* Fill in the entry in the global offset table. */ + bfd_put_32 (output_bfd, initial_got_entry, + sgot->contents + got_offset); + } + + loc = srel->contents + plt_index * RELOC_SIZE (htab); + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); +} + /* Some relocations map to different relocations depending on the target. Return the real relocation. */ @@ -7242,7 +7817,8 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, struct bfd_link_info * info, asection * sym_sec, const char * sym_name, - enum arm_st_branch_type branch_type, + unsigned char st_type, + enum arm_st_branch_type branch_type, struct elf_link_hash_entry * h, bfd_boolean * unresolved_reloc_p, char ** error_message) @@ -7252,13 +7828,21 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, bfd_byte * hit_data = contents + rel->r_offset; bfd_vma * local_got_offsets; bfd_vma * local_tlsdesc_gotents; - asection * sgot = NULL; - asection * splt = NULL; + asection * sgot; + asection * splt; asection * sreloc = NULL; asection * srelgot; bfd_vma addend; bfd_signed_vma signed_addend; + unsigned char dynreloc_st_type; + bfd_vma dynreloc_value; struct elf32_arm_link_hash_table * globals; + struct elf32_arm_link_hash_entry *eh; + union gotplt_union *root_plt; + struct arm_plt_info *arm_plt; + bfd_vma plt_offset; + bfd_vma gotplt_offset; + bfd_boolean has_iplt_entry; globals = elf32_arm_hash_table (info); if (globals == NULL) @@ -7289,12 +7873,16 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, if (bfd_get_start_address (output_bfd) != 0) elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; + eh = (struct elf32_arm_link_hash_entry *) h; sgot = globals->root.sgot; - splt = globals->root.splt; - srelgot = globals->root.srelgot; local_got_offsets = elf_local_got_offsets (input_bfd); local_tlsdesc_gotents = elf32_arm_local_tlsdesc_gotent (input_bfd); + if (globals->root.dynamic_sections_created) + srelgot = globals->root.srelgot; + else + srelgot = NULL; + r_symndx = ELF32_R_SYM (rel->r_info); if (globals->use_rel) @@ -7313,6 +7901,65 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, else addend = signed_addend = rel->r_addend; + /* Record the symbol information that should be used in dynamic + relocations. */ + dynreloc_st_type = st_type; + dynreloc_value = value; + if (branch_type == ST_BRANCH_TO_THUMB) + dynreloc_value |= 1; + + /* Find out whether the symbol has a PLT. Set ST_VALUE, BRANCH_TYPE and + VALUE appropriately for relocations that we resolve at link time. */ + has_iplt_entry = FALSE; + if (elf32_arm_get_plt_info (input_bfd, eh, r_symndx, &root_plt, &arm_plt) + && root_plt->offset != (bfd_vma) -1) + { + plt_offset = root_plt->offset; + gotplt_offset = arm_plt->got_offset; + + if (h == NULL || eh->is_iplt) + { + has_iplt_entry = TRUE; + splt = globals->root.iplt; + + /* Populate .iplt entries here, because not all of them will + be seen by finish_dynamic_symbol. The lower bit is set if + we have already populated the entry. */ + if (plt_offset & 1) + plt_offset--; + else + { + elf32_arm_populate_plt_entry (output_bfd, info, root_plt, arm_plt, + -1, dynreloc_value); + root_plt->offset |= 1; + } + + /* Static relocations always resolve to the .iplt entry. */ + st_type = STT_FUNC; + value = (splt->output_section->vma + + splt->output_offset + + plt_offset); + branch_type = ST_BRANCH_TO_ARM; + + /* If there are non-call relocations that resolve to the .iplt + entry, then all dynamic ones must too. */ + if (arm_plt->noncall_refcount != 0) + { + dynreloc_st_type = st_type; + dynreloc_value = value; + } + } + else + /* We populate the .plt entry in finish_dynamic_symbol. */ + splt = globals->root.splt; + } + else + { + splt = NULL; + plt_offset = (bfd_vma) -1; + gotplt_offset = (bfd_vma) -1; + } + switch (r_type) { case R_ARM_NONE: @@ -7345,18 +7992,17 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, && r_type != R_ARM_CALL && r_type != R_ARM_JUMP24 && r_type != R_ARM_PLT32) - && h != NULL - && splt != NULL - && h->plt.offset != (bfd_vma) -1) + && plt_offset != (bfd_vma) -1) { - /* If we've created a .plt section, and assigned a PLT entry to - this function, it should not be known to bind locally. If - it were, we would have cleared the PLT entry. */ - BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); + /* If we've created a .plt section, and assigned a PLT entry + to this function, it must either be a STT_GNU_IFUNC reference + or not be known to bind locally. In other cases, we should + have cleared the PLT entry by now. */ + BFD_ASSERT (has_iplt_entry || !SYMBOL_CALLS_LOCAL (info, h)); value = (splt->output_section->vma + splt->output_offset - + h->plt.offset); + + plt_offset); *unresolved_reloc_p = FALSE; return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, rel->r_offset, value, @@ -7388,7 +8034,7 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, *unresolved_reloc_p = FALSE; - if (sreloc == NULL) + if (sreloc == NULL && globals->root.dynamic_sections_created) { sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section, ! globals->use_rel); @@ -7424,8 +8070,7 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, int symbol; /* This symbol is local, or marked to become local. */ - if (branch_type == ST_BRANCH_TO_THUMB) - value |= 1; + BFD_ASSERT (r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI); if (globals->symbian_p) { asection *osec; @@ -7465,11 +8110,18 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, relocate the text and data segments independently, so the symbol does not matter. */ symbol = 0; - outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE); + if (dynreloc_st_type == STT_GNU_IFUNC) + /* We have an STT_GNU_IFUNC symbol that doesn't resolve + to the .iplt entry. Instead, every non-call reference + must use an R_ARM_IRELATIVE relocation to obtain the + correct run-time address. */ + outrel.r_info = ELF32_R_INFO (symbol, R_ARM_IRELATIVE); + else + outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE); if (globals->use_rel) relocate = TRUE; else - outrel.r_addend += value; + outrel.r_addend += dynreloc_value; } elf32_arm_add_dynreloc (output_bfd, info, sreloc, &outrel); @@ -7481,8 +8133,8 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, return bfd_reloc_ok; return _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, value, - (bfd_vma) 0); + contents, rel->r_offset, + dynreloc_value, (bfd_vma) 0); } else switch (r_type) { @@ -7535,8 +8187,8 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, hash = (struct elf32_arm_link_hash_entry *) h; stub_type = arm_type_of_stub (info, input_section, rel, - &branch_type, hash, - value, sym_sec, + st_type, &branch_type, + hash, value, sym_sec, input_bfd, sym_name); if (stub_type != arm_stub_none) @@ -7557,13 +8209,11 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, { /* If the call goes through a PLT entry, make sure to check distance to the right destination address. */ - if (h != NULL - && splt != NULL - && h->plt.offset != (bfd_vma) -1) + if (plt_offset != (bfd_vma) -1) { value = (splt->output_section->vma + splt->output_offset - + h->plt.offset); + + plt_offset); *unresolved_reloc_p = FALSE; /* The PLT entry is in ARM mode, regardless of the target function. */ @@ -7609,7 +8259,7 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, The jump to the next instruction is optimized as a NOP depending on the architecture. */ if (h ? (h->root.type == bfd_link_hash_undefweak - && !(splt != NULL && h->plt.offset != (bfd_vma) -1)) + && plt_offset == (bfd_vma) -1) : r_symndx != STN_UNDEF && bfd_is_und_section (sym_sec)) { value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000); @@ -7874,7 +8524,7 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, The jump to the next instruction is optimized as a NOP.W for Thumb-2 enabled architectures. */ if (h && h->root.type == bfd_link_hash_undefweak - && !(splt != NULL && h->plt.offset != (bfd_vma) -1)) + && plt_offset == (bfd_vma) -1) { if (arch_has_thumb2_nop (globals)) { @@ -7925,9 +8575,7 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, If it is a call relative to a section name, then it is not a function call at all, but rather a long jump. Calls through the PLT do not require stubs. */ - if (branch_type == ST_BRANCH_TO_ARM - && (h == NULL || splt == NULL - || h->plt.offset == (bfd_vma) -1)) + if (branch_type == ST_BRANCH_TO_ARM && plt_offset == (bfd_vma) -1) { if (globals->use_blx && r_type == R_ARM_THM_CALL) { @@ -7966,7 +8614,8 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, hash = (struct elf32_arm_link_hash_entry *) h; stub_type = arm_type_of_stub (info, input_section, rel, - &branch_type, hash, value, sym_sec, + st_type, &branch_type, + hash, value, sym_sec, input_bfd, sym_name); if (stub_type != arm_stub_none) @@ -7995,14 +8644,11 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, } /* Handle calls via the PLT. */ - if (stub_type == arm_stub_none - && h != NULL - && splt != NULL - && h->plt.offset != (bfd_vma) -1) + if (stub_type == arm_stub_none && plt_offset != (bfd_vma) -1) { value = (splt->output_section->vma + splt->output_offset - + h->plt.offset); + + plt_offset); if (globals->use_blx && r_type == R_ARM_THM_CALL) { @@ -8107,11 +8753,11 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, } /* Handle calls via the PLT. */ - if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) + if (plt_offset != (bfd_vma) -1) { value = (splt->output_section->vma + splt->output_offset - + h->plt.offset); + + plt_offset); /* Target the Thumb stub before the ARM PLT entry. */ value -= PLT_THUMB_STUB_SIZE; *unresolved_reloc_p = FALSE; @@ -8277,7 +8923,19 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, if (sgot == NULL) return bfd_reloc_notsupported; - if (h != NULL) + if (dynreloc_st_type == STT_GNU_IFUNC + && plt_offset != (bfd_vma) -1 + && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h))) + { + /* We have a relocation against a locally-binding STT_GNU_IFUNC + symbol, and the relocation resolves directly to the runtime + target rather than to the .iplt entry. This means that any + .got entry would be the same value as the .igot.plt entry, + so there's no point creating both. */ + sgot = globals->root.igotplt; + value = sgot->output_offset + gotplt_offset; + } + else if (h != NULL) { bfd_vma off; @@ -8313,13 +8971,13 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, } else { - if (info->shared) - outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); - else - outrel.r_info = 0; - outrel.r_addend = value; - if (branch_type == ST_BRANCH_TO_THUMB) - outrel.r_addend |= 1; + if (dynreloc_st_type == STT_GNU_IFUNC) + outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE); + else if (info->shared) + outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); + else + outrel.r_info = 0; + outrel.r_addend = dynreloc_value; } /* The GOT entry is initialized to zero by default. @@ -8359,27 +9017,21 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, off &= ~1; else { - /* If we are addressing a Thumb function, we need to - adjust the address by one, so that attempts to - call the function pointer will correctly - interpret it as Thumb code. */ - if (branch_type == ST_BRANCH_TO_THUMB) - value |= 1; - if (globals->use_rel) - bfd_put_32 (output_bfd, value, sgot->contents + off); + bfd_put_32 (output_bfd, dynreloc_value, sgot->contents + off); - if (info->shared) + if (info->shared || dynreloc_st_type == STT_GNU_IFUNC) { Elf_Internal_Rela outrel; - BFD_ASSERT (srelgot != NULL); - - outrel.r_addend = addend + value; + outrel.r_addend = addend + dynreloc_value; outrel.r_offset = (sgot->output_section->vma + sgot->output_offset + off); - outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); + if (dynreloc_st_type == STT_GNU_IFUNC) + outrel.r_info = ELF32_R_INFO (0, R_ARM_IRELATIVE); + else + outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); elf32_arm_add_dynreloc (output_bfd, info, srelgot, &outrel); } @@ -8647,7 +9299,8 @@ elf32_arm_final_link_relocate (reloc_howto_type * howto, { bfd_signed_vma offset; enum elf32_arm_stub_type stub_type - = arm_type_of_stub (info, input_section, rel, &branch_type, + = arm_type_of_stub (info, input_section, rel, + st_type, &branch_type, (struct elf32_arm_link_hash_entry *)h, globals->tls_trampoline, globals->root.splt, input_bfd, sym_name); @@ -9677,7 +10330,7 @@ elf32_arm_relocate_section (bfd * output_bfd, if (r == bfd_reloc_continue) r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, input_section, contents, rel, - relocation, info, sec, name, + relocation, info, sec, name, sym_type, (h ? h->target_internal : ARM_SYM_BRANCH_TYPE (sym)), h, &unresolved_reloc, &error_message); @@ -11247,8 +11900,11 @@ elf32_arm_gc_sweep_hook (bfd * abfd, struct elf_link_hash_entry *h = NULL; struct elf32_arm_link_hash_entry *eh; int r_type; + bfd_boolean call_reloc_p; bfd_boolean may_become_dynamic_p; bfd_boolean may_need_local_target_p; + union gotplt_union *root_plt; + struct arm_plt_info *arm_plt; r_symndx = ELF32_R_SYM (rel->r_info); if (r_symndx >= symtab_hdr->sh_info) @@ -11260,6 +11916,7 @@ elf32_arm_gc_sweep_hook (bfd * abfd, } eh = (struct elf32_arm_link_hash_entry *) h; + call_reloc_p = FALSE; may_become_dynamic_p = FALSE; may_need_local_target_p = FALSE; @@ -11295,6 +11952,7 @@ elf32_arm_gc_sweep_hook (bfd * abfd, case R_ARM_THM_CALL: case R_ARM_THM_JUMP24: case R_ARM_THM_JUMP19: + call_reloc_p = TRUE; may_need_local_target_p = TRUE; break; @@ -11319,10 +11977,17 @@ elf32_arm_gc_sweep_hook (bfd * abfd, case R_ARM_THM_MOVT_PREL: /* Should the interworking branches be here also? */ if ((info->shared || globals->root.is_relocatable_executable) - && (sec->flags & SEC_ALLOC) != 0 - && (h != NULL - || (r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI))) - may_become_dynamic_p = TRUE; + && (sec->flags & SEC_ALLOC) != 0) + { + if (h == NULL + && (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)) + { + call_reloc_p = TRUE; + may_need_local_target_p = TRUE; + } + else + may_become_dynamic_p = TRUE; + } else may_need_local_target_p = TRUE; break; @@ -11331,24 +11996,42 @@ elf32_arm_gc_sweep_hook (bfd * abfd, break; } - if (may_need_local_target_p && h != NULL) + if (may_need_local_target_p + && elf32_arm_get_plt_info (abfd, eh, r_symndx, &root_plt, &arm_plt)) { - BFD_ASSERT (h->plt.refcount > 0); - h->plt.refcount -= 1; + BFD_ASSERT (root_plt->refcount > 0); + root_plt->refcount -= 1; + + if (!call_reloc_p) + arm_plt->noncall_refcount--; if (r_type == R_ARM_THM_CALL) - eh->plt_maybe_thumb_refcount--; + arm_plt->maybe_thumb_refcount--; if (r_type == R_ARM_THM_JUMP24 || r_type == R_ARM_THM_JUMP19) - eh->plt_thumb_refcount--; + arm_plt->thumb_refcount--; } - if (may_become_dynamic_p && h != NULL) + if (may_become_dynamic_p) { struct elf_dyn_relocs **pp; struct elf_dyn_relocs *p; + if (h != NULL) + pp = &((struct elf32_arm_link_hash_entry *) h)->dyn_relocs; + else + { + Elf_Internal_Sym *isym; + + isym = bfd_sym_from_r_symndx (&globals->sym_cache, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + pp = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym); + if (pp == NULL) + return FALSE; + } for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) if (p->sec == sec) { @@ -11402,6 +12085,8 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, if (htab->root.dynobj == NULL) htab->root.dynobj = abfd; + if (!create_ifunc_sections (info)) + return FALSE; dynobj = htab->root.dynobj; @@ -11412,6 +12097,7 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, rel_end = relocs + sec->reloc_count; for (rel = relocs; rel < rel_end; rel++) { + Elf_Internal_Sym *isym; struct elf_link_hash_entry *h; struct elf32_arm_link_hash_entry *eh; unsigned long r_symndx; @@ -11432,14 +12118,25 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, return FALSE; } - if (nsyms == 0 || r_symndx < symtab_hdr->sh_info) - h = NULL; - else + h = NULL; + isym = NULL; + if (nsyms > 0) { - 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; + if (r_symndx < symtab_hdr->sh_info) + { + /* A local symbol. */ + isym = bfd_sym_from_r_symndx (&htab->sym_cache, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + } + else + { + 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 elf32_arm_link_hash_entry *) h; @@ -11486,30 +12183,10 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, } else { - bfd_signed_vma *local_got_refcounts; - /* This is a global offset table entry for a local symbol. */ - local_got_refcounts = elf_local_got_refcounts (abfd); - if (local_got_refcounts == NULL) - { - bfd_size_type size; - - size = symtab_hdr->sh_info; - size *= (sizeof (bfd_signed_vma) - + sizeof (bfd_vma) + sizeof (char)); - local_got_refcounts = (bfd_signed_vma *) - bfd_zalloc (abfd, size); - if (local_got_refcounts == NULL) - return FALSE; - elf_local_got_refcounts (abfd) = local_got_refcounts; - elf32_arm_local_tlsdesc_gotent (abfd) - = (bfd_vma *) (local_got_refcounts - + symtab_hdr->sh_info); - elf32_arm_local_got_tls_type (abfd) - = (char *) (elf32_arm_local_tlsdesc_gotent (abfd) - + symtab_hdr->sh_info); - } - local_got_refcounts[r_symndx] += 1; + if (!elf32_arm_allocate_local_sym_info (abfd)) + return FALSE; + elf_local_got_refcounts (abfd)[r_symndx] += 1; old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx]; } @@ -11602,15 +12279,26 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, case R_ARM_THM_MOVT_PREL: /* Should the interworking branches be listed here? */ - /* If we are creating a shared library or relocatable - executable, and this is a reloc against a global symbol, - or a non-PC-relative reloc against a local symbol, - then we may need to copy the reloc into the output. */ if ((info->shared || htab->root.is_relocatable_executable) - && (sec->flags & SEC_ALLOC) != 0 - && (h != NULL - || (r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI))) - may_become_dynamic_p = TRUE; + && (sec->flags & SEC_ALLOC) != 0) + { + if (h == NULL + && (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI)) + { + /* In shared libraries and relocatable executables, + we treat local relative references as calls; + see the related SYMBOL_CALLS_LOCAL code in + allocate_dynrelocs. */ + call_reloc_p = TRUE; + may_need_local_target_p = TRUE; + } + else + /* We are creating a shared library or relocatable + executable, and this is a reloc against a global symbol, + or a non-PC-relative reloc against a local symbol. + We may need to copy the reloc into the output. */ + may_become_dynamic_p = TRUE; + } else may_need_local_target_p = TRUE; break; @@ -11650,22 +12338,44 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, h->non_got_ref = 1; } - if (may_need_local_target_p && h != NULL) + if (may_need_local_target_p + && (h != NULL || ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)) { + union gotplt_union *root_plt; + struct arm_plt_info *arm_plt; + struct arm_local_iplt_info *local_iplt; + + if (h != NULL) + { + root_plt = &h->plt; + arm_plt = &eh->plt; + } + else + { + local_iplt = elf32_arm_create_local_iplt (abfd, r_symndx); + if (local_iplt == NULL) + return FALSE; + root_plt = &local_iplt->root; + arm_plt = &local_iplt->arm; + } + /* If the symbol is a function that doesn't bind locally, this relocation will need a PLT entry. */ - h->plt.refcount += 1; + root_plt->refcount += 1; + + if (!call_reloc_p) + arm_plt->noncall_refcount++; /* It's too early to use htab->use_blx here, so we have to record possible blx references separately from relocs that definitely need a thumb stub. */ if (r_type == R_ARM_THM_CALL) - eh->plt_maybe_thumb_refcount += 1; + arm_plt->maybe_thumb_refcount += 1; if (r_type == R_ARM_THM_JUMP24 || r_type == R_ARM_THM_JUMP19) - eh->plt_thumb_refcount += 1; + arm_plt->thumb_refcount += 1; } if (may_become_dynamic_p) @@ -11698,24 +12408,9 @@ elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, head = &((struct elf32_arm_link_hash_entry *) h)->dyn_relocs; else { - /* Track dynamic relocs needed for local syms too. - We really need local syms available to do this - easily. Oh well. */ - asection *s; - void *vpp; - Elf_Internal_Sym *isym; - - isym = bfd_sym_from_r_symndx (&htab->sym_cache, - abfd, r_symndx); - if (isym == NULL) + head = elf32_arm_get_local_dynreloc_list (abfd, r_symndx, isym); + if (head == NULL) return FALSE; - - s = bfd_section_from_elf_index (abfd, isym->st_shndx); - if (s == NULL) - s = sec; - - vpp = &elf_section_data (s)->local_dynrel; - head = (struct elf_dyn_relocs **) vpp; } p = *head; @@ -11947,6 +12642,7 @@ elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, /* Make sure we know what is going on here. */ BFD_ASSERT (dynobj != NULL && (h->needs_plt + || h->type == STT_GNU_IFUNC || h->u.weakdef != NULL || (h->def_dynamic && h->ref_regular @@ -11957,12 +12653,15 @@ elf32_arm_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) { + /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the + symbol binds locally. */ 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 PLT32 reloc in an input file, but the symbol was never referred to by a dynamic @@ -11970,8 +12669,9 @@ elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, such a case, we don't actually need to build a procedure linkage table, and we can just do a PC24 reloc instead. */ h->plt.offset = (bfd_vma) -1; - eh->plt_thumb_refcount = 0; - eh->plt_maybe_thumb_refcount = 0; + eh->plt.thumb_refcount = 0; + eh->plt.maybe_thumb_refcount = 0; + eh->plt.noncall_refcount = 0; h->needs_plt = 0; } @@ -11985,8 +12685,9 @@ elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, and non-function syms in check-relocs; Objects loaded later in the link may change h->type. So fix it now. */ h->plt.offset = (bfd_vma) -1; - eh->plt_thumb_refcount = 0; - eh->plt_maybe_thumb_refcount = 0; + eh->plt.thumb_refcount = 0; + eh->plt.maybe_thumb_refcount = 0; + eh->plt.noncall_refcount = 0; } /* If this is a weak symbol, and there is a real definition, the @@ -12063,7 +12764,6 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) struct elf32_arm_link_hash_table *htab; struct elf32_arm_link_hash_entry *eh; struct elf_dyn_relocs *p; - bfd_signed_vma thumb_refs; if (h->root.type == bfd_link_hash_indirect) return TRUE; @@ -12081,7 +12781,7 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) if (htab == NULL) return FALSE; - if (htab->root.dynamic_sections_created + if ((htab->root.dynamic_sections_created || h->type == STT_GNU_IFUNC) && h->plt.refcount > 0) { /* Make sure this symbol is output as a dynamic symbol. @@ -12093,29 +12793,29 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) return FALSE; } + /* If the call in the PLT entry binds locally, the associated + GOT entry should use an R_ARM_IRELATIVE relocation instead of + the usual R_ARM_JUMP_SLOT. Put it in the .iplt section rather + than the .plt section. */ + if (h->type == STT_GNU_IFUNC && SYMBOL_CALLS_LOCAL (info, h)) + { + eh->is_iplt = 1; + if (eh->plt.noncall_refcount == 0 + && SYMBOL_REFERENCES_LOCAL (info, h)) + /* All non-call references can be resolved directly. + This means that they can (and in some cases, must) + resolve directly to the run-time target, rather than + to the PLT. That in turns means that any .got entry + would be equal to the .igot.plt entry, so there's + no point having both. */ + h->got.refcount = 0; + } + if (info->shared + || eh->is_iplt || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) { - asection *s = htab->root.splt; - - /* If this is the first .plt entry, make room for the special - first entry. */ - if (s->size == 0) - s->size += htab->plt_header_size; - - h->plt.offset = s->size; - - /* If we will insert a Thumb trampoline before this PLT, leave room - for it. */ - thumb_refs = eh->plt_thumb_refcount; - if (!htab->use_blx) - thumb_refs += eh->plt_maybe_thumb_refcount; - - if (thumb_refs > 0) - { - h->plt.offset += PLT_THUMB_STUB_SIZE; - s->size += PLT_THUMB_STUB_SIZE; - } + elf32_arm_allocate_plt_entry (info, eh->is_iplt, &h->plt, &eh->plt); /* If this symbol is not defined in a regular file, and we are not generating a shared library, then set the symbol to this @@ -12125,7 +12825,7 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) if (! info->shared && !h->def_regular) { - h->root.u.def.section = s; + h->root.u.def.section = htab->root.splt; h->root.u.def.value = h->plt.offset; /* Make sure the function is not marked as Thumb, in case @@ -12134,20 +12834,6 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) h->target_internal = ST_BRANCH_TO_ARM; } - /* Make room for this entry. */ - s->size += htab->plt_entry_size; - - if (!htab->symbian_p) - { - /* We also need to make an entry in the .got.plt section, which - will be placed in the .got section by the linker script. */ - eh->plt_got_offset = (htab->root.sgotplt->size - - 8 * htab->num_tls_desc); - htab->root.sgotplt->size += 4; - } - - /* We also need to make an entry in the .rel(a).plt section. */ - elf32_arm_allocate_dynrelocs (info, htab->root.srelplt, 1); htab->next_tls_desc_index++; /* VxWorks executables have a second set of relocations for @@ -12218,7 +12904,7 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) - elf32_arm_compute_jump_table_size (htab)); htab->root.sgotplt->size += 8; h->got.offset = (bfd_vma) -2; - /* plt_got_offset needs to know there's a TLS_DESC + /* plt.got_offset needs to know there's a TLS_DESC reloc in the middle of .got.plt. */ htab->num_tls_desc++; } @@ -12274,6 +12960,12 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) /* Reserve room for the GOT entry's R_ARM_GLOB_DAT relocation. */ elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1); } + else if (h->type == STT_GNU_IFUNC + && eh->plt.noncall_refcount == 0) + /* No non-call references resolve the STT_GNU_IFUNC's PLT entry; + they all resolve dynamically instead. Reserve room for the + GOT entry's R_ARM_IRELATIVE relocation. */ + elf32_arm_allocate_irelocs (info, htab->root.srelgot, 1); else if (info->shared) /* Reserve room for the GOT entry's R_ARM_RELATIVE relocation. */ elf32_arm_allocate_dynrelocs (info, htab->root.srelgot, 1); @@ -12426,7 +13118,12 @@ allocate_dynrelocs_for_symbol (struct elf_link_hash_entry *h, void * inf) for (p = eh->dyn_relocs; p != NULL; p = p->next) { asection *sreloc = elf_section_data (p->sec)->sreloc; - elf32_arm_allocate_dynrelocs (info, sreloc, p->count); + if (h->type == STT_GNU_IFUNC + && eh->plt.noncall_refcount == 0 + && SYMBOL_REFERENCES_LOCAL (info, h)) + elf32_arm_allocate_irelocs (info, sreloc, p->count); + else + elf32_arm_allocate_dynrelocs (info, sreloc, p->count); } return TRUE; @@ -12513,12 +13210,14 @@ elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, { bfd_signed_vma *local_got; bfd_signed_vma *end_local_got; + struct arm_local_iplt_info **local_iplt_ptr, *local_iplt; char *local_tls_type; bfd_vma *local_tlsdesc_gotent; bfd_size_type locsymcount; Elf_Internal_Shdr *symtab_hdr; asection *srel; bfd_boolean is_vxworks = htab->vxworks_p; + unsigned int symndx; if (! is_arm_elf (ibfd)) continue; @@ -12562,16 +13261,56 @@ elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, symtab_hdr = & elf_symtab_hdr (ibfd); locsymcount = symtab_hdr->sh_info; end_local_got = local_got + locsymcount; + local_iplt_ptr = elf32_arm_local_iplt (ibfd); local_tls_type = elf32_arm_local_got_tls_type (ibfd); local_tlsdesc_gotent = elf32_arm_local_tlsdesc_gotent (ibfd); + symndx = 0; s = htab->root.sgot; srel = htab->root.srelgot; for (; local_got < end_local_got; - ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) + ++local_got, ++local_iplt_ptr, ++local_tls_type, + ++local_tlsdesc_gotent, ++symndx) { *local_tlsdesc_gotent = (bfd_vma) -1; + local_iplt = *local_iplt_ptr; + if (local_iplt != NULL) + { + struct elf_dyn_relocs *p; + + if (local_iplt->root.refcount > 0) + { + elf32_arm_allocate_plt_entry (info, TRUE, + &local_iplt->root, + &local_iplt->arm); + if (local_iplt->arm.noncall_refcount == 0) + /* All references to the PLT are calls, so all + non-call references can resolve directly to the + run-time target. This means that the .got entry + would be the same as the .igot.plt entry, so there's + no point creating both. */ + *local_got = 0; + } + else + { + BFD_ASSERT (local_iplt->arm.noncall_refcount == 0); + local_iplt->root.offset = (bfd_vma) -1; + } + + for (p = local_iplt->dyn_relocs; p != NULL; p = p->next) + { + asection *psrel; + + psrel = elf_section_data (p->sec)->sreloc; + if (local_iplt->arm.noncall_refcount == 0) + elf32_arm_allocate_irelocs (info, psrel, p->count); + else + elf32_arm_allocate_dynrelocs (info, psrel, p->count); + } + } if (*local_got > 0) { + Elf_Internal_Sym *isym; + *local_got = s->size; if (*local_tls_type & GOT_TLS_GD) /* TLS_GD relocs need an 8-byte structure in the GOT. */ @@ -12582,7 +13321,7 @@ elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, - elf32_arm_compute_jump_table_size (htab); htab->root.sgotplt->size += 8; *local_got = (bfd_vma) -2; - /* plt_got_offset needs to know there's a TLS_DESC + /* plt.got_offset needs to know there's a TLS_DESC reloc in the middle of .got.plt. */ htab->num_tls_desc++; } @@ -12597,8 +13336,19 @@ elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, s->size += 4; } - if ((info->shared && !(*local_tls_type & GOT_TLS_GDESC)) - || *local_tls_type & GOT_TLS_GD) + isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, symndx); + if (isym == NULL) + return FALSE; + + /* If all references to an STT_GNU_IFUNC PLT are calls, + then all non-call references, including this GOT entry, + resolve directly to the run-time target. */ + if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC + && (local_iplt == NULL + || local_iplt->arm.noncall_refcount == 0)) + elf32_arm_allocate_irelocs (info, srel, 1); + else if ((info->shared && !(*local_tls_type & GOT_TLS_GDESC)) + || *local_tls_type & GOT_TLS_GD) elf32_arm_allocate_dynrelocs (info, srel, 1); if (info->shared && *local_tls_type & GOT_TLS_GDESC) @@ -12691,7 +13441,7 @@ elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, of the dynobj section names depend upon the input files. */ name = bfd_get_section_name (dynobj, s); - if (strcmp (name, ".plt") == 0) + if (s == htab->root.splt) { /* Remember whether there is a PLT. */ plt = s->size != 0; @@ -12710,8 +13460,11 @@ elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, s->reloc_count = 0; } } - else if (! CONST_STRNEQ (name, ".got") - && strcmp (name, ".dynbss") != 0) + else if (s != htab->root.sgot + && s != htab->root.sgotplt + && s != htab->root.iplt + && s != htab->root.igotplt + && s != htab->sdynbss) { /* It's not one of our sections, so don't allocate space. */ continue; @@ -12873,187 +13626,13 @@ elf32_arm_finish_dynamic_symbol (bfd * output_bfd, if (h->plt.offset != (bfd_vma) -1) { - asection * splt; - asection * srel; - bfd_byte *loc; - bfd_vma plt_index; - Elf_Internal_Rela rel; - - /* This symbol has an entry in the procedure linkage table. Set - it up. */ - - BFD_ASSERT (h->dynindx != -1); - - splt = htab->root.splt; - srel = htab->root.srelplt; - BFD_ASSERT (splt != NULL && srel != NULL); - - /* Fill in the entry in the procedure linkage table. */ - if (htab->symbian_p) - { - put_arm_insn (htab, output_bfd, - elf32_arm_symbian_plt_entry[0], - splt->contents + h->plt.offset); - bfd_put_32 (output_bfd, - elf32_arm_symbian_plt_entry[1], - splt->contents + h->plt.offset + 4); - - /* Fill in the entry in the .rel.plt section. */ - rel.r_offset = (splt->output_section->vma - + splt->output_offset - + h->plt.offset + 4); - rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); - - /* 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. */ - plt_index = ((h->plt.offset - htab->plt_header_size) - / htab->plt_entry_size); - } - else + if (!eh->is_iplt) { - bfd_vma got_offset, got_address, plt_address; - bfd_vma got_displacement; - asection * sgot; - bfd_byte * ptr; - - sgot = htab->root.sgotplt; - BFD_ASSERT (sgot != NULL); - - /* Get the offset into the .got.plt table of the entry that - corresponds to this function. */ - got_offset = eh->plt_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 three entries in .got.plt are reserved; after that - symbols appear in the same order as in .plt. */ - plt_index = (got_offset - 12) / 4; - - /* Calculate the address of the GOT entry. */ - got_address = (sgot->output_section->vma - + sgot->output_offset - + got_offset); - - /* ...and the address of the PLT entry. */ - plt_address = (splt->output_section->vma - + splt->output_offset - + h->plt.offset); - - ptr = splt->contents + h->plt.offset; - if (htab->vxworks_p && info->shared) - { - unsigned int i; - bfd_vma val; - - for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4) - { - val = elf32_arm_vxworks_shared_plt_entry[i]; - if (i == 2) - val |= got_address - sgot->output_section->vma; - if (i == 5) - val |= plt_index * RELOC_SIZE (htab); - if (i == 2 || i == 5) - bfd_put_32 (output_bfd, val, ptr); - else - put_arm_insn (htab, output_bfd, val, ptr); - } - } - else if (htab->vxworks_p) - { - unsigned int i; - bfd_vma val; - - for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4) - { - val = elf32_arm_vxworks_exec_plt_entry[i]; - if (i == 2) - val |= got_address; - if (i == 4) - val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2); - if (i == 5) - val |= plt_index * RELOC_SIZE (htab); - if (i == 2 || i == 5) - bfd_put_32 (output_bfd, val, ptr); - else - put_arm_insn (htab, output_bfd, val, ptr); - } - - loc = (htab->srelplt2->contents - + (plt_index * 2 + 1) * RELOC_SIZE (htab)); - - /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation - referencing the GOT for this PLT entry. */ - rel.r_offset = plt_address + 8; - rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); - rel.r_addend = got_offset; - SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); - loc += RELOC_SIZE (htab); - - /* Create the R_ARM_ABS32 relocation referencing the - beginning of the PLT for this GOT entry. */ - rel.r_offset = got_address; - rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); - rel.r_addend = 0; - SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); - } - else - { - bfd_signed_vma thumb_refs; - /* Calculate the displacement between the PLT slot and the - entry in the GOT. The eight-byte offset accounts for the - value produced by adding to pc in the first instruction - of the PLT stub. */ - got_displacement = got_address - (plt_address + 8); - - BFD_ASSERT ((got_displacement & 0xf0000000) == 0); - - thumb_refs = eh->plt_thumb_refcount; - if (!htab->use_blx) - thumb_refs += eh->plt_maybe_thumb_refcount; - - if (thumb_refs > 0) - { - put_thumb_insn (htab, output_bfd, - elf32_arm_plt_thumb_stub[0], ptr - 4); - put_thumb_insn (htab, output_bfd, - elf32_arm_plt_thumb_stub[1], ptr - 2); - } - - put_arm_insn (htab, output_bfd, - elf32_arm_plt_entry[0] - | ((got_displacement & 0x0ff00000) >> 20), - ptr + 0); - put_arm_insn (htab, output_bfd, - elf32_arm_plt_entry[1] - | ((got_displacement & 0x000ff000) >> 12), - ptr+ 4); - put_arm_insn (htab, output_bfd, - elf32_arm_plt_entry[2] - | (got_displacement & 0x00000fff), - ptr + 8); -#ifdef FOUR_WORD_PLT - bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12); -#endif - } - - /* Fill in the entry in the global offset table. */ - bfd_put_32 (output_bfd, - (splt->output_section->vma - + splt->output_offset), - sgot->contents + got_offset); - - /* Fill in the entry in the .rel(a).plt section. */ - rel.r_addend = 0; - rel.r_offset = got_address; - rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); + BFD_ASSERT (h->dynindx != -1); + elf32_arm_populate_plt_entry (output_bfd, info, &h->plt, &eh->plt, + h->dynindx, 0); } - loc = srel->contents + plt_index * RELOC_SIZE (htab); - SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); - if (!h->def_regular) { /* Mark the symbol as undefined, rather than as defined in @@ -13066,6 +13645,18 @@ elf32_arm_finish_dynamic_symbol (bfd * output_bfd, if (!h->ref_regular_nonweak) sym->st_value = 0; } + else if (eh->is_iplt && eh->plt.noncall_refcount != 0) + { + /* At least one non-call relocation references this .iplt entry, + so the .iplt entry is the function's canonical address. */ + sym->st_info = ELF_ST_INFO (ELF_ST_BIND (sym->st_info), STT_FUNC); + sym->st_target_internal = ST_BRANCH_TO_ARM; + sym->st_shndx = (_bfd_elf_section_from_bfd_section + (output_bfd, htab->root.iplt->output_section)); + sym->st_value = (h->plt.offset + + htab->root.iplt->output_section->vma + + htab->root.iplt->output_offset); + } } if (h->needs_copy) @@ -13620,35 +14211,39 @@ elf32_arm_output_map_sym (output_arch_syminfo *osi, return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; } - -/* Output mapping symbols for PLT entries associated with H. */ +/* Output mapping symbols for the PLT entry described by ROOT_PLT and ARM_PLT. + IS_IPLT_ENTRY_P says whether the PLT is in .iplt rather than .plt. */ static bfd_boolean -elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf) +elf32_arm_output_plt_map_1 (output_arch_syminfo *osi, + bfd_boolean is_iplt_entry_p, + union gotplt_union *root_plt, + struct arm_plt_info *arm_plt) { - output_arch_syminfo *osi = (output_arch_syminfo *) inf; struct elf32_arm_link_hash_table *htab; - struct elf32_arm_link_hash_entry *eh; - bfd_vma addr; + bfd_vma addr, plt_header_size; - if (h->root.type == bfd_link_hash_indirect) - return TRUE; - - if (h->root.type == bfd_link_hash_warning) - /* When warning symbols are created, they **replace** the "real" - entry in the hash table, thus we never get to see the real - symbol in a hash traversal. So look at it now. */ - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - if (h->plt.offset == (bfd_vma) -1) + if (root_plt->offset == (bfd_vma) -1) return TRUE; htab = elf32_arm_hash_table (osi->info); if (htab == NULL) return FALSE; - eh = (struct elf32_arm_link_hash_entry *) h; - addr = h->plt.offset; + if (is_iplt_entry_p) + { + osi->sec = htab->root.iplt; + plt_header_size = 0; + } + else + { + osi->sec = htab->root.splt; + plt_header_size = htab->plt_header_size; + } + osi->sec_shndx = (_bfd_elf_section_from_bfd_section + (osi->info->output_bfd, osi->sec->output_section)); + + addr = root_plt->offset & -2; if (htab->symbian_p) { if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr)) @@ -13669,13 +14264,10 @@ elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf) } else { - bfd_signed_vma thumb_refs; + bfd_boolean thumb_stub_p; - thumb_refs = eh->plt_thumb_refcount; - if (!htab->use_blx) - thumb_refs += eh->plt_maybe_thumb_refcount; - - if (thumb_refs > 0) + thumb_stub_p = elf32_arm_plt_needs_thumb_stub_p (osi->info, arm_plt); + if (thumb_stub_p) { if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4)) return FALSE; @@ -13689,7 +14281,7 @@ elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf) /* A three-word PLT with no Thumb thunk contains only Arm code, so only need to output a mapping symbol for the first PLT entry and entries with thumb thunks. */ - if (thumb_refs > 0 || addr == 20) + if (thumb_stub_p || addr == plt_header_size) { if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr)) return FALSE; @@ -13700,6 +14292,28 @@ elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf) return TRUE; } +/* Output mapping symbols for PLT entries associated with H. */ + +static bfd_boolean +elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf) +{ + output_arch_syminfo *osi = (output_arch_syminfo *) inf; + struct elf32_arm_link_hash_entry *eh; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + if (h->root.type == bfd_link_hash_warning) + /* When warning symbols are created, they **replace** the "real" + entry in the hash table, thus we never get to see the real + symbol in a hash traversal. So look at it now. */ + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + eh = (struct elf32_arm_link_hash_entry *) h; + return elf32_arm_output_plt_map_1 (osi, SYMBOL_CALLS_LOCAL (osi->info, h), + &h->plt, &eh->plt); +} + /* Output a single local symbol for a generated stub. */ static bfd_boolean @@ -13954,35 +14568,59 @@ elf32_arm_output_arch_local_syms (bfd *output_bfd, } /* Finally, output mapping symbols for the PLT. */ - if (!htab->root.splt || htab->root.splt->size == 0) - return TRUE; - - osi.sec = htab->root.splt; - osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd, - osi.sec->output_section); - /* Output mapping symbols for the plt header. SymbianOS does not have a - plt header. */ - if (htab->vxworks_p) + if (htab->root.splt && htab->root.splt->size > 0) { - /* VxWorks shared libraries have no PLT header. */ - if (!info->shared) + osi.sec = htab->root.splt; + osi.sec_shndx = (_bfd_elf_section_from_bfd_section + (output_bfd, osi.sec->output_section)); + + /* Output mapping symbols for the plt header. SymbianOS does not have a + plt header. */ + if (htab->vxworks_p) + { + /* VxWorks shared libraries have no PLT header. */ + if (!info->shared) + { + if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0)) + return FALSE; + if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12)) + return FALSE; + } + } + else if (!htab->symbian_p) { if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0)) return FALSE; - if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12)) +#ifndef FOUR_WORD_PLT + if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16)) return FALSE; +#endif } } - else if (!htab->symbian_p) + if ((htab->root.splt && htab->root.splt->size > 0) + || (htab->root.iplt && htab->root.iplt->size > 0)) { - if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0)) - return FALSE; -#ifndef FOUR_WORD_PLT - if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16)) - return FALSE; -#endif - } + elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, &osi); + for (input_bfd = info->input_bfds; + input_bfd != NULL; + input_bfd = input_bfd->link_next) + { + struct arm_local_iplt_info **local_iplt; + unsigned int i, num_syms; + local_iplt = elf32_arm_local_iplt (input_bfd); + if (local_iplt != NULL) + { + num_syms = elf_symtab_hdr (input_bfd).sh_info; + for (i = 0; i < num_syms; i++) + if (local_iplt[i] != NULL + && !elf32_arm_output_plt_map_1 (&osi, TRUE, + &local_iplt[i]->root, + &local_iplt[i]->arm)) + return FALSE; + } + } + } if (htab->dt_tlsdesc_plt != 0) { /* Mapping symbols for the lazy tls trampoline. */ @@ -14005,7 +14643,6 @@ elf32_arm_output_arch_local_syms (bfd *output_bfd, #endif } - elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi); return TRUE; } @@ -14475,7 +15112,8 @@ elf32_arm_swap_symbol_in (bfd * abfd, /* New EABI objects mark thumb function symbols by setting the low bit of the address. */ - if ((ELF_ST_TYPE (dst->st_info) == STT_FUNC) + if ((ELF_ST_TYPE (dst->st_info) == STT_FUNC + || ELF_ST_TYPE (dst->st_info) == STT_GNU_IFUNC) && (dst->st_value & 1)) { dst->st_value &= ~(bfd_vma) 1; @@ -14512,7 +15150,8 @@ elf32_arm_swap_symbol_out (bfd *abfd, if (src->st_target_internal == ST_BRANCH_TO_THUMB) { newsym = *src; - newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC); + if (ELF_ST_TYPE (src->st_info) != STT_GNU_IFUNC) + newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC); if (newsym.st_shndx != SHN_UNDEF) { /* Do this only for defined symbols. At link type, the static @@ -14582,6 +15221,26 @@ elf32_arm_additional_program_headers (bfd *abfd, return 0; } +/* Hook called by the linker routine which adds symbols from an object + file. */ + +static bfd_boolean +elf32_arm_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, + Elf_Internal_Sym *sym, const char **namep, + flagword *flagsp, asection **secp, bfd_vma *valp) +{ + if ((abfd->flags & DYNAMIC) == 0 + && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) + elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE; + + if (elf32_arm_hash_table (info)->vxworks_p + && !elf_vxworks_add_symbol_hook (abfd, info, sym, namep, + flagsp, secp, valp)) + return FALSE; + + return TRUE; +} + /* We use this to override swap_symbol_in and swap_symbol_out. */ const struct elf_size_info elf32_arm_size_info = { @@ -14667,6 +15326,7 @@ const struct elf_size_info elf32_arm_size_info = #define elf_backend_additional_program_headers elf32_arm_additional_program_headers #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms #define elf_backend_begin_write_processing elf32_arm_begin_write_processing +#define elf_backend_add_symbol_hook elf32_arm_add_symbol_hook #define elf_backend_can_refcount 1 #define elf_backend_can_gc_sections 1 @@ -14734,8 +15394,6 @@ elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) #undef bfd_elf32_bfd_link_hash_table_create #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create -#undef elf_backend_add_symbol_hook -#define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook #undef elf_backend_final_write_processing #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing #undef elf_backend_emit_relocs @@ -15103,7 +15761,6 @@ elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt, #define ELF_DYNAMIC_SEC_FLAGS \ (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED) -#undef elf_backend_add_symbol_hook #undef elf_backend_emit_relocs #undef bfd_elf32_bfd_link_hash_table_create |