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- /* VAX series support for 32-bit ELF
- Copyright (C) 1993-2022 Free Software Foundation, Inc.
- Contributed by Matt Thomas <matt@3am-software.com>.
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "bfdlink.h"
- #include "libbfd.h"
- #include "elf-bfd.h"
- #include "elf/vax.h"
- static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
- static bool rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *);
- static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *,
- struct bfd_hash_table *,
- const char *);
- static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *);
- static bool elf_vax_check_relocs (bfd *, struct bfd_link_info *,
- asection *, const Elf_Internal_Rela *);
- static bool elf_vax_adjust_dynamic_symbol (struct bfd_link_info *,
- struct elf_link_hash_entry *);
- static bool elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *);
- static int elf_vax_relocate_section (bfd *, struct bfd_link_info *,
- bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *,
- Elf_Internal_Sym *, asection **);
- static bool elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *,
- struct elf_link_hash_entry *,
- Elf_Internal_Sym *);
- static bool elf_vax_finish_dynamic_sections (bfd *, struct bfd_link_info *);
- static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *,
- const arelent *);
- static bool elf32_vax_set_private_flags (bfd *, flagword);
- static bool elf32_vax_print_private_bfd_data (bfd *, void *);
- static reloc_howto_type howto_table[] = {
- HOWTO (R_VAX_NONE, /* type */
- 0, /* rightshift */
- 3, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_NONE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x00000000, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_VAX_32, /* 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_VAX_32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_VAX_16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x0000ffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_VAX_8, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 8, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_8", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x000000ff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_VAX_PC32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_PC32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_VAX_PC16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_PC16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x0000ffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_VAX_PC8, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 8, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_PC8", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x000000ff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_VAX_GOT32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_GOT32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- true), /* pcrel_offset */
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- HOWTO (R_VAX_PLT32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_PLT32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- true), /* pcrel_offset */
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- HOWTO (R_VAX_COPY, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_COPY", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_VAX_GLOB_DAT, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_GLOB_DAT", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_VAX_JMP_SLOT, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_JMP_SLOT", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_VAX_RELATIVE, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_VAX_RELATIVE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- /* GNU extension to record C++ vtable hierarchy */
- HOWTO (R_VAX_GNU_VTINHERIT, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
- "R_VAX_GNU_VTINHERIT", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- /* GNU extension to record C++ vtable member usage */
- HOWTO (R_VAX_GNU_VTENTRY, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- _bfd_elf_rel_vtable_reloc_fn, /* special_function */
- "R_VAX_GNU_VTENTRY", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- };
- static bool
- rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
- {
- unsigned int r_type;
- r_type = ELF32_R_TYPE (dst->r_info);
- if (r_type >= R_VAX_max)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
- abfd, r_type);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- cache_ptr->howto = &howto_table[r_type];
- return true;
- }
- #define elf_info_to_howto rtype_to_howto
- static const struct
- {
- bfd_reloc_code_real_type bfd_val;
- int elf_val;
- } reloc_map[] = {
- { BFD_RELOC_NONE, R_VAX_NONE },
- { BFD_RELOC_32, R_VAX_32 },
- { BFD_RELOC_16, R_VAX_16 },
- { BFD_RELOC_8, R_VAX_8 },
- { BFD_RELOC_32_PCREL, R_VAX_PC32 },
- { BFD_RELOC_16_PCREL, R_VAX_PC16 },
- { BFD_RELOC_8_PCREL, R_VAX_PC8 },
- { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 },
- { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 },
- { BFD_RELOC_NONE, R_VAX_COPY },
- { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT },
- { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT },
- { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE },
- { BFD_RELOC_CTOR, R_VAX_32 },
- { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT },
- { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY },
- };
- static reloc_howto_type *
- reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
- {
- unsigned int i;
- for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
- {
- if (reloc_map[i].bfd_val == code)
- return &howto_table[reloc_map[i].elf_val];
- }
- return 0;
- }
- static reloc_howto_type *
- reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- const char *r_name)
- {
- unsigned int i;
- for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
- if (howto_table[i].name != NULL
- && strcasecmp (howto_table[i].name, r_name) == 0)
- return &howto_table[i];
- return NULL;
- }
- #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
- #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
- #define ELF_ARCH bfd_arch_vax
- /* end code generated by elf.el */
- /* Functions for the VAX ELF linker. */
- /* The name of the dynamic interpreter. This is put in the .interp
- section. */
- #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so"
- /* The size in bytes of an entry in the procedure linkage table. */
- #define PLT_ENTRY_SIZE 12
- /* The first entry in a procedure linkage table looks like this. See
- the SVR4 ABI VAX supplement to see how this works. */
- static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] =
- {
- 0xdd, 0xef, /* pushl l^ */
- 0, 0, 0, 0, /* offset to .plt.got + 4 */
- 0x17, 0xff, /* jmp @L^(pc) */
- 0, 0, 0, 0, /* offset to .plt.got + 8 */
- };
- /* Subsequent entries in a procedure linkage table look like this. */
- static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] =
- {
- 0xfc, 0x0f, /* .word ^M<r11:r2> */
- 0x16, 0xef, /* jsb L^(pc) */
- 0, 0, 0, 0, /* replaced with offset to start of .plt */
- 0, 0, 0, 0, /* index into .rela.plt */
- };
- /* The VAX linker needs to keep track of the number of relocs that it
- decides to copy in check_relocs for each symbol. This is so that it
- can discard PC relative relocs if it doesn't need them when linking
- with -Bsymbolic. We store the information in a field extending the
- regular ELF linker hash table. */
- /* This structure keeps track of the number of PC relative relocs we have
- copied for a given symbol. */
- struct elf_vax_pcrel_relocs_copied
- {
- /* Next section. */
- struct elf_vax_pcrel_relocs_copied *next;
- /* A section in dynobj. */
- asection *section;
- /* Number of relocs copied in this section. */
- bfd_size_type count;
- };
- /* VAX ELF linker hash entry. */
- struct elf_vax_link_hash_entry
- {
- struct elf_link_hash_entry root;
- /* Number of PC relative relocs copied for this symbol. */
- struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied;
- bfd_vma got_addend;
- };
- /* Declare this now that the above structures are defined. */
- static bool elf_vax_discard_copies (struct elf_vax_link_hash_entry *,
- void *);
- /* Declare this now that the above structures are defined. */
- static bool elf_vax_instantiate_got_entries (struct elf_link_hash_entry *,
- void *);
- /* Traverse an VAX ELF linker hash table. */
- #define elf_vax_link_hash_traverse(table, func, info) \
- (elf_link_hash_traverse \
- ((table), \
- (bool (*) (struct elf_link_hash_entry *, void *)) (func), \
- (info)))
- /* Create an entry in an VAX ELF linker hash table. */
- static struct bfd_hash_entry *
- elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
- {
- struct elf_vax_link_hash_entry *ret =
- (struct elf_vax_link_hash_entry *) entry;
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (ret == NULL)
- ret = ((struct elf_vax_link_hash_entry *)
- bfd_hash_allocate (table,
- sizeof (struct elf_vax_link_hash_entry)));
- if (ret == NULL)
- return (struct bfd_hash_entry *) ret;
- /* Call the allocation method of the superclass. */
- ret = ((struct elf_vax_link_hash_entry *)
- _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
- table, string));
- if (ret != NULL)
- {
- ret->pcrel_relocs_copied = NULL;
- }
- return (struct bfd_hash_entry *) ret;
- }
- /* Create an VAX ELF linker hash table. */
- static struct bfd_link_hash_table *
- elf_vax_link_hash_table_create (bfd *abfd)
- {
- struct elf_link_hash_table *ret;
- size_t amt = sizeof (struct elf_link_hash_table);
- ret = bfd_zmalloc (amt);
- if (ret == NULL)
- return NULL;
- if (!_bfd_elf_link_hash_table_init (ret, abfd,
- elf_vax_link_hash_newfunc,
- sizeof (struct elf_vax_link_hash_entry),
- GENERIC_ELF_DATA))
- {
- free (ret);
- return NULL;
- }
- return &ret->root;
- }
- /* Keep vax-specific flags in the ELF header */
- static bool
- elf32_vax_set_private_flags (bfd *abfd, flagword flags)
- {
- elf_elfheader (abfd)->e_flags = flags;
- elf_flags_init (abfd) = true;
- return true;
- }
- /* Merge backend specific data from an object file to the output
- object file when linking. */
- static bool
- elf32_vax_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
- {
- bfd *obfd = info->output_bfd;
- flagword in_flags;
- if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
- in_flags = elf_elfheader (ibfd)->e_flags;
- if (!elf_flags_init (obfd))
- {
- elf_flags_init (obfd) = true;
- elf_elfheader (obfd)->e_flags = in_flags;
- }
- return true;
- }
- /* Display the flags field */
- static bool
- elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr)
- {
- FILE *file = (FILE *) ptr;
- BFD_ASSERT (abfd != NULL && ptr != NULL);
- /* Print normal ELF private data. */
- _bfd_elf_print_private_bfd_data (abfd, ptr);
- /* Ignore init flag - it may not be set, despite the flags field containing valid data. */
- /* xgettext:c-format */
- fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
- if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC)
- fprintf (file, _(" [nonpic]"));
- if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT)
- fprintf (file, _(" [d-float]"));
- if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT)
- fprintf (file, _(" [g-float]"));
- fputc ('\n', file);
- return true;
- }
- /* Look through the relocs for a section during the first phase, and
- allocate space in the global offset table or procedure linkage
- table. */
- static bool
- elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
- const Elf_Internal_Rela *relocs)
- {
- bfd *dynobj;
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel;
- const Elf_Internal_Rela *rel_end;
- asection *sreloc;
- if (bfd_link_relocatable (info))
- return true;
- dynobj = elf_hash_table (info)->dynobj;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (abfd);
- sreloc = NULL;
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- 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;
- }
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_VAX_GOT32:
- BFD_ASSERT (h != NULL);
- /* If this is a local symbol, we resolve it directly without
- creating a global offset table entry. */
- if (SYMBOL_REFERENCES_LOCAL (info, h)
- || h == elf_hash_table (info)->hgot
- || h == elf_hash_table (info)->hplt)
- break;
- /* This symbol requires a global offset table entry. */
- if (dynobj == NULL)
- {
- /* Create the .got section. */
- elf_hash_table (info)->dynobj = dynobj = abfd;
- if (!_bfd_elf_create_got_section (dynobj, info))
- return false;
- }
- if (h != NULL)
- {
- struct elf_vax_link_hash_entry *eh;
- eh = (struct elf_vax_link_hash_entry *) h;
- if (h->got.refcount == -1)
- {
- h->got.refcount = 1;
- eh->got_addend = rel->r_addend;
- }
- else
- {
- h->got.refcount++;
- if (eh->got_addend != (bfd_vma) rel->r_addend)
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: GOT addend of %" PRId64 " to `%s' does"
- " not match previous GOT addend of %" PRId64),
- abfd, (int64_t) rel->r_addend, h->root.root.string,
- (int64_t) eh->got_addend);
- }
- }
- break;
- case R_VAX_PLT32:
- /* This symbol requires a procedure linkage table entry. We
- actually build the entry in adjust_dynamic_symbol,
- because this might be a case of linking PIC code which is
- never referenced by a dynamic object, in which case we
- don't need to generate a procedure linkage table entry
- after all. */
- BFD_ASSERT (h != NULL);
- /* If this is a local symbol, we resolve it directly without
- creating a procedure linkage table entry. */
- if (h->forced_local)
- break;
- h->needs_plt = 1;
- if (h->plt.refcount == -1)
- h->plt.refcount = 1;
- else
- h->plt.refcount++;
- break;
- case R_VAX_PC8:
- case R_VAX_PC16:
- case R_VAX_PC32:
- /* If we are creating a shared library and this is not a local
- symbol, we need to copy the reloc into the shared library.
- However when linking with -Bsymbolic and this is a global
- symbol which is defined in an object we are including in the
- link (i.e., DEF_REGULAR is set), then we can resolve the
- reloc directly. At this point we have not seen all the input
- files, so it is possible that DEF_REGULAR is not set now but
- will be set later (it is never cleared). We account for that
- possibility below by storing information in the
- pcrel_relocs_copied field of the hash table entry. */
- if (!(bfd_link_pic (info)
- && (sec->flags & SEC_ALLOC) != 0
- && h != NULL
- && (!info->symbolic
- || !h->def_regular)))
- {
- if (h != NULL
- && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- && !h->forced_local)
- {
- /* Make sure a plt entry is created for this symbol if
- it turns out to be a function defined by a dynamic
- object. */
- if (h->plt.refcount == -1)
- h->plt.refcount = 1;
- else
- h->plt.refcount++;
- }
- break;
- }
- /* If this is a local symbol, we can resolve it directly. */
- if (h != NULL
- && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- || h->forced_local))
- break;
- /* Fall through. */
- case R_VAX_8:
- case R_VAX_16:
- case R_VAX_32:
- if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
- {
- /* Make sure a plt entry is created for this symbol if it
- turns out to be a function defined by a dynamic object. */
- if (h->plt.refcount == -1)
- h->plt.refcount = 1;
- else
- h->plt.refcount++;
- }
- /* Non-GOT reference may need a copy reloc in executable or
- a dynamic reloc in shared library. */
- if (h != NULL)
- h->non_got_ref = 1;
- /* If we are creating a shared library, we need to copy the
- reloc into the shared library. */
- if (bfd_link_pic (info)
- && (sec->flags & SEC_ALLOC) != 0)
- {
- /* When creating a shared object, we must copy these
- reloc types into the output file. We create a reloc
- section in dynobj and make room for this reloc. */
- if (sreloc == NULL)
- {
- sreloc = _bfd_elf_make_dynamic_reloc_section
- (sec, dynobj, 2, abfd, /*rela?*/ true);
- if (sreloc == NULL)
- return false;
- if (sec->flags & SEC_READONLY)
- info->flags |= DF_TEXTREL;
- }
- sreloc->size += sizeof (Elf32_External_Rela);
- /* If we are linking with -Bsymbolic, we count the number of
- PC relative relocations we have entered for this symbol,
- so that we can discard them again if the symbol is later
- defined by a regular object. Note that this function is
- only called if we are using a vaxelf linker hash table,
- which means that h is really a pointer to an
- elf_vax_link_hash_entry. */
- if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8
- || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16
- || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32)
- && info->symbolic)
- {
- struct elf_vax_link_hash_entry *eh;
- struct elf_vax_pcrel_relocs_copied *p;
- eh = (struct elf_vax_link_hash_entry *) h;
- for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
- if (p->section == sreloc)
- break;
- if (p == NULL)
- {
- p = ((struct elf_vax_pcrel_relocs_copied *)
- bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
- if (p == NULL)
- return false;
- p->next = eh->pcrel_relocs_copied;
- eh->pcrel_relocs_copied = p;
- p->section = sreloc;
- p->count = 0;
- }
- ++p->count;
- }
- }
- break;
- /* This relocation describes the C++ object vtable hierarchy.
- Reconstruct it for later use during GC. */
- case R_VAX_GNU_VTINHERIT:
- if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
- return false;
- break;
- /* This relocation describes which C++ vtable entries are actually
- used. Record for later use during GC. */
- case R_VAX_GNU_VTENTRY:
- if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
- return false;
- break;
- default:
- break;
- }
- }
- return true;
- }
- /* Return the section that should be marked against GC for a given
- relocation. */
- static asection *
- elf_vax_gc_mark_hook (asection *sec,
- struct bfd_link_info *info,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
- {
- if (h != NULL)
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_VAX_GNU_VTINHERIT:
- case R_VAX_GNU_VTENTRY:
- return NULL;
- }
- return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
- }
- /* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
- static bool
- elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
- {
- bfd *dynobj;
- asection *s;
- dynobj = elf_hash_table (info)->dynobj;
- /* Make sure we know what is going on here. */
- BFD_ASSERT (dynobj != NULL
- && (h->needs_plt
- || h->is_weakalias
- || (h->def_dynamic
- && h->ref_regular
- && !h->def_regular)));
- /* 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->plt.refcount <= 0
- || 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 PLTxx reloc in an input
- file, but the symbol was never referred to by a dynamic
- object, or if all references were garbage collected. In
- such a case, we don't actually need to build a procedure
- linkage table, and we can just do a PCxx reloc instead. */
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- return true;
- }
- s = elf_hash_table (info)->splt;
- BFD_ASSERT (s != NULL);
- /* If this is the first .plt entry, make room for the special
- first entry. */
- if (s->size == 0)
- {
- s->size += PLT_ENTRY_SIZE;
- }
- /* If this symbol is not defined in a regular file, and we are
- not generating a shared library, then set the symbol to this
- location in the .plt. This is required to make function
- pointers compare as equal between the normal executable and
- the shared library. */
- if (!bfd_link_pic (info)
- && !h->def_regular)
- {
- h->root.u.def.section = s;
- h->root.u.def.value = s->size;
- }
- h->plt.offset = s->size;
- /* Make room for this entry. */
- s->size += PLT_ENTRY_SIZE;
- /* We also need to make an entry in the .got.plt section, which
- will be placed in the .got section by the linker script. */
- s = elf_hash_table (info)->sgotplt;
- BFD_ASSERT (s != NULL);
- s->size += 4;
- /* We also need to make an entry in the .rela.plt section. */
- s = elf_hash_table (info)->srelplt;
- BFD_ASSERT (s != NULL);
- s->size += sizeof (Elf32_External_Rela);
- return true;
- }
- /* Reinitialize the plt offset now that it is not used as a reference
- count any more. */
- h->plt.offset = (bfd_vma) -1;
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->is_weakalias)
- {
- struct elf_link_hash_entry *def = weakdef (h);
- BFD_ASSERT (def->root.type == bfd_link_hash_defined);
- h->root.u.def.section = def->root.u.def.section;
- h->root.u.def.value = def->root.u.def.value;
- return true;
- }
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
- /* If we are creating a shared library, we must presume that the
- only references to the symbol are via the global offset table.
- For such cases we need not do anything here; the relocations will
- be handled correctly by relocate_section. */
- if (bfd_link_pic (info))
- return true;
- /* If there are no references to this symbol that do not use the
- GOT relocation, we don't need to generate a copy reloc. */
- if (!h->non_got_ref)
- return true;
- /* We must allocate the symbol in our .dynbss section, which will
- become part of the .bss section of the executable. There will be
- an entry for this symbol in the .dynsym section. The dynamic
- object will contain position independent code, so all references
- from the dynamic object to this symbol will go through the global
- offset table. The dynamic linker will use the .dynsym entry to
- determine the address it must put in the global offset table, so
- both the dynamic object and the regular object will refer to the
- same memory location for the variable. */
- s = bfd_get_linker_section (dynobj, ".dynbss");
- BFD_ASSERT (s != NULL);
- /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to
- copy the initial value out of the dynamic object and into the
- runtime process image. We need to remember the offset into the
- .rela.bss section we are going to use. */
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
- {
- asection *srel;
- srel = bfd_get_linker_section (dynobj, ".rela.bss");
- BFD_ASSERT (srel != NULL);
- srel->size += sizeof (Elf32_External_Rela);
- h->needs_copy = 1;
- }
- return _bfd_elf_adjust_dynamic_copy (info, h, s);
- }
- /* This function is called via elf_link_hash_traverse. It resets GOT
- and PLT (.GOT) reference counts back to -1 so normal PC32 relocation
- will be done. */
- static bool
- elf_vax_discard_got_entries (struct elf_link_hash_entry *h,
- void *infoptr ATTRIBUTE_UNUSED)
- {
- h->got.refcount = -1;
- h->plt.refcount = -1;
- return true;
- }
- /* Discard unused dynamic data if this is a static link. */
- static bool
- elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info)
- {
- bfd *dynobj;
- asection *s;
- dynobj = elf_hash_table (info)->dynobj;
- if (dynobj && !elf_hash_table (info)->dynamic_sections_created)
- {
- /* We may have created entries in the .rela.got and .got sections.
- However, if we are not creating the dynamic sections, we will
- not actually use these entries. Reset the size of .rela.got
- and .got, which will cause them to get stripped from the output
- file below. */
- s = elf_hash_table (info)->srelgot;
- if (s != NULL)
- s->size = 0;
- s = elf_hash_table (info)->sgotplt;
- if (s != NULL)
- s->size = 0;
- s = elf_hash_table (info)->sgot;
- if (s != NULL)
- s->size = 0;
- }
- /* If this is a static link, we need to discard all the got entries we've
- recorded. */
- if (!dynobj || !elf_hash_table (info)->dynamic_sections_created)
- elf_link_hash_traverse (elf_hash_table (info),
- elf_vax_discard_got_entries,
- info);
- return true;
- }
- /* Set the sizes of the dynamic sections. */
- static bool
- elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
- {
- bfd *dynobj;
- asection *s;
- bool relocs;
- dynobj = elf_hash_table (info)->dynobj;
- BFD_ASSERT (dynobj != NULL);
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (bfd_link_executable (info) && !info->nointerp)
- {
- s = bfd_get_linker_section (dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
- }
- }
- /* If this is a -Bsymbolic shared link, then we need to discard all PC
- relative relocs against symbols defined in a regular object. We
- allocated space for them in the check_relocs routine, but we will not
- fill them in in the relocate_section routine. */
- if (bfd_link_pic (info) && info->symbolic)
- elf_vax_link_hash_traverse (elf_hash_table (info),
- elf_vax_discard_copies,
- NULL);
- /* If this is a -Bsymbolic shared link, we need to discard all the got
- entries we've recorded. Otherwise, we need to instantiate (allocate
- space for them). */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_vax_instantiate_got_entries,
- info);
- /* The check_relocs and adjust_dynamic_symbol entry points have
- determined the sizes of the various dynamic sections. Allocate
- memory for them. */
- relocs = false;
- for (s = dynobj->sections; s != NULL; s = s->next)
- {
- const char *name;
- if ((s->flags & SEC_LINKER_CREATED) == 0)
- continue;
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_section_name (s);
- if (strcmp (name, ".plt") == 0)
- {
- /* Remember whether there is a PLT. */
- ;
- }
- else if (startswith (name, ".rela"))
- {
- if (s->size != 0)
- {
- if (strcmp (name, ".rela.plt") != 0)
- relocs = true;
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
- }
- }
- else if (! startswith (name, ".got")
- && strcmp (name, ".dynbss") != 0)
- {
- /* It's not one of our sections, so don't allocate space. */
- continue;
- }
- if (s->size == 0)
- {
- /* If we don't need this section, strip it from the
- output file. This is mostly to handle .rela.bss and
- .rela.plt. We must create both sections in
- create_dynamic_sections, because they must be created
- before the linker maps input sections to output
- sections. The linker does that before
- adjust_dynamic_symbol is called, and it is that
- function which decides whether anything needs to go
- into these sections. */
- s->flags |= SEC_EXCLUDE;
- continue;
- }
- if ((s->flags & SEC_HAS_CONTENTS) == 0)
- continue;
- /* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
- if (s->contents == NULL)
- return false;
- }
- return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
- }
- /* This function is called via elf_vax_link_hash_traverse if we are
- creating a shared object with -Bsymbolic. It discards the space
- allocated to copy PC relative relocs against symbols which are defined
- in regular objects. We allocated space for them in the check_relocs
- routine, but we won't fill them in in the relocate_section routine. */
- static bool
- elf_vax_discard_copies (struct elf_vax_link_hash_entry *h,
- void * ignore ATTRIBUTE_UNUSED)
- {
- struct elf_vax_pcrel_relocs_copied *s;
- /* We only discard relocs for symbols defined in a regular object. */
- if (!h->root.def_regular)
- return true;
- for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
- s->section->size -= s->count * sizeof (Elf32_External_Rela);
- return true;
- }
- /* This function is called via elf_link_hash_traverse. It looks for
- entries that have GOT or PLT (.GOT) references. If creating a shared
- object with -Bsymbolic, or the symbol has been forced local, then it
- resets the reference count back to -1 so normal PC32 relocation will
- be done. Otherwise space in the .got and .rela.got will be reserved
- for the symbol. */
- static bool
- elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr)
- {
- struct bfd_link_info *info = (struct bfd_link_info *) infoptr;
- bfd *dynobj;
- asection *sgot;
- asection *srelgot;
- /* We don't care about non-GOT (and non-PLT) entries. */
- if (h->got.refcount <= 0 && h->plt.refcount <= 0)
- return true;
- dynobj = elf_hash_table (info)->dynobj;
- BFD_ASSERT (dynobj != NULL);
- sgot = elf_hash_table (info)->sgot;
- srelgot = elf_hash_table (info)->srelgot;
- if (SYMBOL_REFERENCES_LOCAL (info, h))
- {
- h->got.refcount = -1;
- h->plt.refcount = -1;
- }
- else if (h->got.refcount > 0)
- {
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (!bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
- }
- /* Allocate space in the .got and .rela.got sections. */
- sgot->size += 4;
- srelgot->size += sizeof (Elf32_External_Rela);
- }
- return true;
- }
- /* Relocate an VAX ELF section. */
- static int
- elf_vax_relocate_section (bfd *output_bfd,
- struct bfd_link_info *info,
- bfd *input_bfd,
- asection *input_section,
- bfd_byte *contents,
- Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms,
- asection **local_sections)
- {
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- bfd_vma plt_index;
- bfd_vma got_offset;
- asection *sgot;
- asection *splt;
- asection *sgotplt;
- asection *sreloc;
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (input_bfd);
- sgot = NULL;
- splt = NULL;
- sgotplt = NULL;
- sreloc = NULL;
- rel = relocs;
- relend = relocs + input_section->reloc_count;
- for (; rel < relend; rel++)
- {
- int r_type;
- reloc_howto_type *howto;
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
- asection *sec;
- bfd_vma relocation;
- bfd_reloc_status_type r;
- r_type = ELF32_R_TYPE (rel->r_info);
- if (r_type < 0 || r_type >= (int) R_VAX_max)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- howto = howto_table + r_type;
- r_symndx = ELF32_R_SYM (rel->r_info);
- h = NULL;
- sym = NULL;
- sec = NULL;
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
- }
- else
- {
- bool unresolved_reloc;
- bool warned, ignored;
- RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
- r_symndx, symtab_hdr, sym_hashes,
- h, sec, relocation,
- unresolved_reloc, warned, ignored);
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && ((r_type == R_VAX_PLT32
- && h->plt.offset != (bfd_vma) -1
- && !h->forced_local
- && elf_hash_table (info)->dynamic_sections_created)
- || (r_type == R_VAX_GOT32
- && h->got.offset != (bfd_vma) -1
- && !h->forced_local
- && elf_hash_table (info)->dynamic_sections_created
- && (! bfd_link_pic (info)
- || (! info->symbolic && h->dynindx != -1)
- || !h->def_regular))
- || (bfd_link_pic (info)
- && ((! info->symbolic && h->dynindx != -1)
- || !h->def_regular)
- && ((input_section->flags & SEC_ALLOC) != 0
- /* DWARF will emit R_VAX_32 relocations in its
- sections against symbols defined externally
- in shared libraries. We can't do anything
- with them here. */
- || ((input_section->flags & SEC_DEBUGGING) != 0
- && h->def_dynamic))
- && (r_type == R_VAX_8
- || r_type == R_VAX_16
- || r_type == R_VAX_32))))
- /* In these cases, we don't need the relocation
- value. We check specially because in some
- obscure cases sec->output_section will be NULL. */
- relocation = 0;
- }
- if (sec != NULL && discarded_section (sec))
- RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, 1, relend, howto, 0, contents);
- if (bfd_link_relocatable (info))
- continue;
- switch (r_type)
- {
- case R_VAX_GOT32:
- /* Relocation is to the address of the entry for this symbol
- in the global offset table. */
- /* Resolve a GOTxx reloc against a local symbol directly,
- without using the global offset table. */
- if (h == NULL
- || h->got.offset == (bfd_vma) -1)
- break;
- {
- bfd_vma off;
- sgot = elf_hash_table (info)->sgot;
- BFD_ASSERT (sgot != NULL);
- off = h->got.offset;
- BFD_ASSERT (off < sgot->size);
- bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off);
- relocation = sgot->output_offset + off;
- /* The GOT relocation uses the addend. */
- rel->r_addend = 0;
- /* Change the reference to be indirect. */
- contents[rel->r_offset - 1] |= 0x10;
- relocation += sgot->output_section->vma;
- }
- break;
- case R_VAX_PC32:
- /* If we are creating an executable and the function this
- reloc refers to is in a shared lib, then we made a PLT
- entry for this symbol and need to handle the reloc like
- a PLT reloc. */
- if (bfd_link_pic (info))
- goto r_vax_pc32_shared;
- /* Fall through. */
- case R_VAX_PLT32:
- /* Relocation is to the entry for this symbol in the
- procedure linkage table. */
- /* Resolve a PLTxx reloc against a local symbol directly,
- without using the procedure linkage table. */
- if (h == NULL
- || h->plt.offset == (bfd_vma) -1)
- break;
- splt = elf_hash_table (info)->splt;
- BFD_ASSERT (splt != NULL);
- sgotplt = elf_hash_table (info)->sgotplt;
- BFD_ASSERT (sgotplt != NULL);
- plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
- /* Get the offset into the .got table of the entry that
- corresponds to this function. Each .got entry is 4 bytes.
- The first two are reserved. */
- got_offset = (plt_index + 3) * 4;
- /* We want the relocation to point into the .got.plt instead
- of the plt itself. */
- relocation = (sgotplt->output_section->vma
- + sgotplt->output_offset
- + got_offset);
- contents[rel->r_offset-1] |= 0x10; /* make indirect */
- if (rel->r_addend == 2)
- {
- h->plt.offset |= 1;
- }
- else if (rel->r_addend != 0)
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: PLT addend of %" PRId64 " to `%s'"
- " from %pA section ignored"),
- input_bfd, (int64_t) rel->r_addend, h->root.root.string,
- input_section);
- rel->r_addend = 0;
- break;
- case R_VAX_PC8:
- case R_VAX_PC16:
- r_vax_pc32_shared:
- if (h == NULL
- || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- || h->forced_local)
- break;
- /* Fall through. */
- case R_VAX_8:
- case R_VAX_16:
- case R_VAX_32:
- if (bfd_link_pic (info)
- && r_symndx != STN_UNDEF
- && (input_section->flags & SEC_ALLOC) != 0
- && ((r_type != R_VAX_PC8
- && r_type != R_VAX_PC16
- && r_type != R_VAX_PC32)
- || ((input_section->flags & SEC_CODE)
- && (!info->symbolic
- || (!h->def_regular && h->type != STT_SECTION)))))
- {
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
- bool skip, relocate;
- /* When generating a shared object, these relocations
- are copied into the output file to be resolved at run
- time. */
- if (sreloc == NULL)
- {
- sreloc = _bfd_elf_get_dynamic_reloc_section
- (input_bfd, input_section, /*rela?*/ true);
- if (sreloc == NULL)
- return false;
- }
- skip = false;
- relocate = false;
- outrel.r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section,
- rel->r_offset);
- if (outrel.r_offset == (bfd_vma) -1)
- skip = true;
- if (outrel.r_offset == (bfd_vma) -2)
- skip = true, relocate = true;
- outrel.r_offset += (input_section->output_section->vma
- + input_section->output_offset);
- if (skip)
- memset (&outrel, 0, sizeof outrel);
- /* h->dynindx may be -1 if the symbol was marked to
- become local. */
- else if (h != NULL
- && ((! info->symbolic && h->dynindx != -1)
- || !h->def_regular))
- {
- BFD_ASSERT (h->dynindx != -1);
- outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
- outrel.r_addend = relocation + rel->r_addend;
- }
- else
- {
- if (r_type == R_VAX_32)
- {
- relocate = true;
- outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE);
- BFD_ASSERT (bfd_get_signed_32 (input_bfd,
- &contents[rel->r_offset]) == 0);
- outrel.r_addend = relocation + rel->r_addend;
- }
- else
- {
- long indx;
- if (bfd_is_abs_section (sec))
- indx = 0;
- else if (sec == NULL || sec->owner == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- else
- {
- asection *osec;
- /* We are turning this relocation into one
- against a section symbol. It would be
- proper to subtract the symbol's value,
- osec->vma, from the emitted reloc addend,
- but ld.so expects buggy relocs. */
- osec = sec->output_section;
- indx = elf_section_data (osec)->dynindx;
- if (indx == 0)
- {
- struct elf_link_hash_table *htab;
- htab = elf_hash_table (info);
- osec = htab->text_index_section;
- indx = elf_section_data (osec)->dynindx;
- }
- BFD_ASSERT (indx != 0);
- }
- outrel.r_info = ELF32_R_INFO (indx, r_type);
- outrel.r_addend = relocation + rel->r_addend;
- }
- }
- if ((input_section->flags & SEC_CODE) != 0
- || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32
- && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE
- && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY
- && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT
- && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT))
- {
- if (h != NULL)
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: %s relocation against symbol `%s'"
- " from %pA section"),
- input_bfd, howto->name, h->root.root.string,
- input_section);
- else
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: %s relocation to %#" PRIx64
- " from %pA section"),
- input_bfd, howto->name, (uint64_t) outrel.r_addend,
- input_section);
- }
- loc = sreloc->contents;
- loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
- /* This reloc will be computed at runtime, so there's no
- need to do anything now, except for R_VAX_32
- relocations that have been turned into
- R_VAX_RELATIVE. */
- if (!relocate)
- continue;
- }
- break;
- case R_VAX_GNU_VTINHERIT:
- case R_VAX_GNU_VTENTRY:
- /* These are no-ops in the end. */
- continue;
- default:
- break;
- }
- /* VAX PCREL relocations are from the end of relocation, not the start.
- So subtract the difference from the relocation amount since we can't
- add it to the offset. */
- if (howto->pc_relative && howto->pcrel_offset)
- relocation -= bfd_get_reloc_size(howto);
- r = _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset,
- relocation, rel->r_addend);
- if (r != bfd_reloc_ok)
- {
- switch (r)
- {
- default:
- case bfd_reloc_outofrange:
- abort ();
- case bfd_reloc_overflow:
- {
- const char *name;
- if (h != NULL)
- name = NULL;
- else
- {
- name = bfd_elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
- if (name == NULL)
- return false;
- if (*name == '\0')
- name = bfd_section_name (sec);
- }
- info->callbacks->reloc_overflow
- (info, (h ? &h->root : NULL), name, howto->name,
- (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
- }
- break;
- }
- }
- }
- return true;
- }
- /* Finish up dynamic symbol handling. We set the contents of various
- dynamic sections here. */
- static bool
- elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
- {
- bfd *dynobj;
- dynobj = elf_hash_table (info)->dynobj;
- if (h->plt.offset != (bfd_vma) -1)
- {
- asection *splt;
- asection *sgot;
- asection *srela;
- bfd_vma plt_index;
- bfd_vma got_offset;
- bfd_vma addend;
- Elf_Internal_Rela rela;
- bfd_byte *loc;
- /* This symbol has an entry in the procedure linkage table. Set
- it up. */
- BFD_ASSERT (h->dynindx != -1);
- splt = elf_hash_table (info)->splt;
- sgot = elf_hash_table (info)->sgotplt;
- srela = elf_hash_table (info)->srelplt;
- BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
- addend = 2 * (h->plt.offset & 1);
- h->plt.offset &= ~1;
- /* 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 / PLT_ENTRY_SIZE - 1;
- /* Get the offset into the .got table of the entry that
- corresponds to this function. Each .got entry is 4 bytes.
- The first two are reserved. */
- got_offset = (plt_index + 3) * 4;
- /* Fill in the entry in the procedure linkage table. */
- memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry,
- PLT_ENTRY_SIZE);
- /* The offset is relative to the first extension word. */
- bfd_put_32 (output_bfd,
- -(h->plt.offset + 8),
- splt->contents + h->plt.offset + 4);
- bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
- splt->contents + h->plt.offset + 8);
- /* Fill in the entry in the global offset table. */
- bfd_put_32 (output_bfd,
- (splt->output_section->vma
- + splt->output_offset
- + h->plt.offset) + addend,
- sgot->contents + got_offset);
- /* Fill in the entry in the .rela.plt section. */
- rela.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + got_offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT);
- rela.r_addend = addend;
- loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
- if (!h->def_regular)
- {
- /* Mark the symbol as undefined, rather than as defined in
- the .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- }
- }
- if (h->got.offset != (bfd_vma) -1)
- {
- asection *sgot;
- asection *srela;
- Elf_Internal_Rela rela;
- bfd_byte *loc;
- /* This symbol has an entry in the global offset table. Set it
- up. */
- sgot = elf_hash_table (info)->sgot;
- srela = elf_hash_table (info)->srelgot;
- BFD_ASSERT (sgot != NULL && srela != NULL);
- rela.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + h->got.offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT);
- rela.r_addend = bfd_get_signed_32 (output_bfd,
- sgot->contents + h->got.offset);
- loc = srela->contents;
- loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
- }
- if (h->needs_copy)
- {
- asection *s;
- Elf_Internal_Rela rela;
- bfd_byte *loc;
- /* This symbol needs a copy reloc. Set it up. */
- BFD_ASSERT (h->dynindx != -1
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak));
- s = bfd_get_linker_section (dynobj, ".rela.bss");
- BFD_ASSERT (s != NULL);
- rela.r_offset = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY);
- rela.r_addend = 0;
- loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
- }
- /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
- if (h == elf_hash_table (info)->hdynamic
- || h == elf_hash_table (info)->hgot)
- sym->st_shndx = SHN_ABS;
- return true;
- }
- /* Finish up the dynamic sections. */
- static bool
- elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
- {
- bfd *dynobj;
- asection *sgot;
- asection *sdyn;
- dynobj = elf_hash_table (info)->dynobj;
- sgot = elf_hash_table (info)->sgotplt;
- BFD_ASSERT (sgot != NULL);
- sdyn = bfd_get_linker_section (dynobj, ".dynamic");
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- asection *splt;
- Elf32_External_Dyn *dyncon, *dynconend;
- splt = elf_hash_table (info)->splt;
- BFD_ASSERT (splt != NULL && sdyn != NULL);
- dyncon = (Elf32_External_Dyn *) sdyn->contents;
- dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- asection *s;
- bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
- switch (dyn.d_tag)
- {
- default:
- break;
- case DT_PLTGOT:
- s = elf_hash_table (info)->sgotplt;
- goto get_vma;
- case DT_JMPREL:
- s = elf_hash_table (info)->srelplt;
- get_vma:
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- case DT_PLTRELSZ:
- s = elf_hash_table (info)->srelplt;
- dyn.d_un.d_val = s->size;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- }
- }
- /* Fill in the first entry in the procedure linkage table. */
- if (splt->size > 0)
- {
- memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE);
- bfd_put_32 (output_bfd,
- (sgot->output_section->vma
- + sgot->output_offset + 4
- - (splt->output_section->vma + 6)),
- splt->contents + 2);
- bfd_put_32 (output_bfd,
- (sgot->output_section->vma
- + sgot->output_offset + 8
- - (splt->output_section->vma + 12)),
- splt->contents + 8);
- elf_section_data (splt->output_section)->this_hdr.sh_entsize
- = PLT_ENTRY_SIZE;
- }
- }
- /* Fill in the first three entries in the global offset table. */
- if (sgot->size > 0)
- {
- if (sdyn == NULL)
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
- else
- bfd_put_32 (output_bfd,
- sdyn->output_section->vma + sdyn->output_offset,
- sgot->contents);
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
- }
- if (elf_section_data (sgot->output_section) != NULL)
- elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
- return true;
- }
- static enum elf_reloc_type_class
- elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
- const asection *rel_sec ATTRIBUTE_UNUSED,
- const Elf_Internal_Rela *rela)
- {
- switch ((int) ELF32_R_TYPE (rela->r_info))
- {
- case R_VAX_RELATIVE:
- return reloc_class_relative;
- case R_VAX_JMP_SLOT:
- return reloc_class_plt;
- case R_VAX_COPY:
- return reloc_class_copy;
- default:
- return reloc_class_normal;
- }
- }
- static bfd_vma
- elf_vax_plt_sym_val (bfd_vma i, const asection *plt,
- const arelent *rel ATTRIBUTE_UNUSED)
- {
- return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
- }
- #define TARGET_LITTLE_SYM vax_elf32_vec
- #define TARGET_LITTLE_NAME "elf32-vax"
- #define ELF_MACHINE_CODE EM_VAX
- #define ELF_MAXPAGESIZE 0x1000
- #define elf_backend_create_dynamic_sections \
- _bfd_elf_create_dynamic_sections
- #define bfd_elf32_bfd_link_hash_table_create \
- elf_vax_link_hash_table_create
- #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
- #define elf_backend_check_relocs elf_vax_check_relocs
- #define elf_backend_adjust_dynamic_symbol \
- elf_vax_adjust_dynamic_symbol
- #define elf_backend_always_size_sections \
- elf_vax_always_size_sections
- #define elf_backend_size_dynamic_sections \
- elf_vax_size_dynamic_sections
- #define elf_backend_init_index_section _bfd_elf_init_1_index_section
- #define elf_backend_relocate_section elf_vax_relocate_section
- #define elf_backend_finish_dynamic_symbol \
- elf_vax_finish_dynamic_symbol
- #define elf_backend_finish_dynamic_sections \
- elf_vax_finish_dynamic_sections
- #define elf_backend_reloc_type_class elf_vax_reloc_type_class
- #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook
- #define elf_backend_plt_sym_val elf_vax_plt_sym_val
- #define bfd_elf32_bfd_merge_private_bfd_data \
- elf32_vax_merge_private_bfd_data
- #define bfd_elf32_bfd_set_private_flags \
- elf32_vax_set_private_flags
- #define bfd_elf32_bfd_print_private_bfd_data \
- elf32_vax_print_private_bfd_data
- #define elf_backend_can_gc_sections 1
- #define elf_backend_want_got_plt 1
- #define elf_backend_plt_readonly 1
- #define elf_backend_want_plt_sym 0
- #define elf_backend_got_header_size 16
- #define elf_backend_rela_normal 1
- #define elf_backend_dtrel_excludes_plt 1
- #include "elf32-target.h"
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