* elf32-i386.c (elf_i386_relocate_section): Get the relocation
value if the symbol is turning into a local symbol. * elf32-m68k.c (elf_m68k_relocate_section): Likewise. * elf32-sparc.c (elf32_sparc_relocate_section): Likewise.
This commit is contained in:
parent
43ee18a06d
commit
6a1878c997
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@ -1,3 +1,10 @@
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Wed Jun 11 00:00:07 1997 Ian Lance Taylor <ian@cygnus.com>
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* elf32-i386.c (elf_i386_relocate_section): Get the relocation
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value if the symbol is turning into a local symbol.
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* elf32-m68k.c (elf_m68k_relocate_section): Likewise.
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* elf32-sparc.c (elf32_sparc_relocate_section): Likewise.
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1997-06-10 22:58 Ulrich Drepper <drepper@cygnus.com>
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* elflink.h (elf_link_add_object_symbols): Also read verneed
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@ -643,7 +643,8 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
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is only called if we are using an elf_i386 linker
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hash table, which means that h is really a pointer to
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an elf_i386_link_hash_entry. */
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if (h != NULL && info->symbolic)
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if (h != NULL && info->symbolic
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&& ELF32_R_TYPE (rel->r_info) == R_386_PC32)
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{
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struct elf_i386_link_hash_entry *eh;
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struct elf_i386_pcrel_relocs_copied *p;
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@ -1182,7 +1183,7 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
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|| (h->elf_link_hash_flags
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& ELF_LINK_HASH_DEF_REGULAR) == 0))
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|| (info->shared
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&& (! info->symbolic
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&& ((! info->symbolic && h->dynindx != -1)
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|| (h->elf_link_hash_flags
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& ELF_LINK_HASH_DEF_REGULAR) == 0)
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&& (r_type == R_386_32
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275
bfd/elf32-m68k.c
275
bfd/elf32-m68k.c
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@ -1,5 +1,5 @@
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/* Motorola 68k series support for 32-bit ELF
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Copyright 1993, 1995, 1996 Free Software Foundation, Inc.
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Copyright 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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@ -29,6 +29,10 @@ static void rtype_to_howto
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
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static void rtype_to_howto_rel
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
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static struct bfd_hash_entry *elf_m68k_link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *elf_m68k_link_hash_table_create
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PARAMS ((bfd *));
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static boolean elf_m68k_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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@ -205,6 +209,115 @@ static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
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0, 0, 0, 0 /* replaced with offset to start of .plt. */
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};
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/* The m68k linker needs to keep track of the number of relocs that it
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decides to copy in check_relocs for each symbol. This is so that it
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can discard PC relative relocs if it doesn't need them when linking
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with -Bsymbolic. We store the information in a field extending the
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regular ELF linker hash table. */
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/* This structure keeps track of the number of PC relative relocs we have
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copied for a given symbol. */
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struct elf_m68k_pcrel_relocs_copied
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{
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/* Next section. */
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struct elf_m68k_pcrel_relocs_copied *next;
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/* A section in dynobj. */
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asection *section;
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/* Number of relocs copied in this section. */
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bfd_size_type count;
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};
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/* m68k ELF linker hash entry. */
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struct elf_m68k_link_hash_entry
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{
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struct elf_link_hash_entry root;
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/* Number of PC relative relocs copied for this symbol. */
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struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied;
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};
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/* m68k ELF linker hash table. */
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struct elf_m68k_link_hash_table
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{
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struct elf_link_hash_table root;
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};
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/* Declare this now that the above structures are defined. */
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static boolean elf_m68k_discard_copies
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PARAMS ((struct elf_m68k_link_hash_entry *, PTR));
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/* Traverse an m68k ELF linker hash table. */
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#define elf_m68k_link_hash_traverse(table, func, info) \
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(elf_link_hash_traverse \
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(&(table)->root, \
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(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
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(info)))
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/* Get the m68k ELF linker hash table from a link_info structure. */
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#define elf_m68k_hash_table(p) \
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((struct elf_m68k_link_hash_table *) (p)->hash)
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/* Create an entry in an m68k ELF linker hash table. */
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static struct bfd_hash_entry *
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elf_m68k_link_hash_newfunc (entry, table, string)
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struct bfd_hash_entry *entry;
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struct bfd_hash_table *table;
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const char *string;
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{
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struct elf_m68k_link_hash_entry *ret =
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(struct elf_m68k_link_hash_entry *) entry;
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/* Allocate the structure if it has not already been allocated by a
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subclass. */
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if (ret == (struct elf_m68k_link_hash_entry *) NULL)
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ret = ((struct elf_m68k_link_hash_entry *)
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bfd_hash_allocate (table,
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sizeof (struct elf_m68k_link_hash_entry)));
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if (ret == (struct elf_m68k_link_hash_entry *) NULL)
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return (struct bfd_hash_entry *) ret;
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/* Call the allocation method of the superclass. */
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ret = ((struct elf_m68k_link_hash_entry *)
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_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
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table, string));
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if (ret != (struct elf_m68k_link_hash_entry *) NULL)
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{
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ret->pcrel_relocs_copied = NULL;
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}
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return (struct bfd_hash_entry *) ret;
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}
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/* Create an m68k ELF linker hash table. */
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static struct bfd_link_hash_table *
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elf_m68k_link_hash_table_create (abfd)
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bfd *abfd;
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{
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struct elf_m68k_link_hash_table *ret;
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ret = ((struct elf_m68k_link_hash_table *)
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bfd_alloc (abfd, sizeof (struct elf_m68k_link_hash_table)));
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if (ret == (struct elf_m68k_link_hash_table *) NULL)
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return NULL;
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if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
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elf_m68k_link_hash_newfunc))
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{
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bfd_release (abfd, ret);
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return NULL;
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}
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return &ret->root.root;
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}
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/* Look through the relocs for a section during the first phase, and
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allocate space in the global offset table or procedure linkage
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table. */
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@ -398,20 +511,31 @@ elf_m68k_check_relocs (abfd, info, sec, relocs)
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case R_68K_PC8:
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case R_68K_PC16:
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case R_68K_PC32:
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if (h == NULL)
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/* If we are creating a shared library and this is not a local
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symbol, we need to copy the reloc into the shared library.
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However when linking with -Bsymbolic and this is a global
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symbol which is defined in an object we are including in the
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link (i.e., DEF_REGULAR is set), then we can resolve the
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reloc directly. At this point we have not seen all the input
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files, so it is possible that DEF_REGULAR is not set now but
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will be set later (it is never cleared). We account for that
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possibility below by storing information in the
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pcrel_relocs_copied field of the hash table entry. */
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if (!(info->shared
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&& (sec->flags & SEC_ALLOC) != 0
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&& h != NULL
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&& (!info->symbolic
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|| (h->elf_link_hash_flags
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& ELF_LINK_HASH_DEF_REGULAR) == 0)))
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break;
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/* Fall through. */
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case R_68K_8:
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case R_68K_16:
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case R_68K_32:
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/* If we are creating a shared library, we need to copy the
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reloc into the shared library. */
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if (info->shared
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&& (sec->flags & SEC_ALLOC) != 0
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&& ((ELF32_R_TYPE (rel->r_info) != R_68K_PC8
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&& ELF32_R_TYPE (rel->r_info) != R_68K_PC16
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&& ELF32_R_TYPE (rel->r_info) != R_68K_PC32)
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|| (!info->symbolic
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|| (h->elf_link_hash_flags
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& ELF_LINK_HASH_DEF_REGULAR) == 0)))
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&& (sec->flags & SEC_ALLOC) != 0)
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{
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/* When creating a shared object, we must copy these
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reloc types into the output file. We create a reloc
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@ -449,6 +573,42 @@ elf_m68k_check_relocs (abfd, info, sec, relocs)
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}
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sreloc->_raw_size += sizeof (Elf32_External_Rela);
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/* If we are linking with -Bsymbolic, we count the number of
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PC relative relocations we have entered for this symbol,
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so that we can discard them again if the symbol is later
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defined by a regular object. Note that this function is
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only called if we are using an m68kelf linker hash table,
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which means that h is really a pointer to an
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elf_m68k_link_hash_entry. */
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if ((ELF32_R_TYPE (rel->r_info) == R_68K_PC8
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|| ELF32_R_TYPE (rel->r_info) == R_68K_PC16
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|| ELF32_R_TYPE (rel->r_info) == R_68K_PC32)
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&& info->symbolic)
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{
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struct elf_m68k_link_hash_entry *eh;
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struct elf_m68k_pcrel_relocs_copied *p;
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eh = (struct elf_m68k_link_hash_entry *) h;
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for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
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if (p->section == sreloc)
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break;
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if (p == NULL)
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{
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p = ((struct elf_m68k_pcrel_relocs_copied *)
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bfd_alloc (dynobj, sizeof *p));
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if (p == NULL)
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return false;
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p->next = eh->pcrel_relocs_copied;
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eh->pcrel_relocs_copied = p;
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p->section = sreloc;
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p->count = 0;
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}
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++p->count;
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}
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}
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break;
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@ -595,14 +755,11 @@ elf_m68k_adjust_dynamic_symbol (info, h)
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s = bfd_get_section_by_name (dynobj, ".dynbss");
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BFD_ASSERT (s != NULL);
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/* If the symbol is currently defined in the .bss section of the
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dynamic object, then it is OK to simply initialize it to zero.
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If the symbol is in some other section, we must generate a
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R_68K_COPY reloc to tell the dynamic linker to copy the initial
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value out of the dynamic object and into the runtime process
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image. We need to remember the offset into the .rela.bss section
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we are going to use. */
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if ((h->root.u.def.section->flags & SEC_LOAD) != 0)
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/* We must generate a R_68K_COPY reloc to tell the dynamic linker to
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copy the initial value out of the dynamic object and into the
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runtime process image. We need to remember the offset into the
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.rela.bss section we are going to use. */
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if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
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{
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asection *srel;
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||||
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|
@ -676,6 +833,15 @@ elf_m68k_size_dynamic_sections (output_bfd, info)
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s->_raw_size = 0;
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||||
}
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||||
/* If this is a -Bsymbolic shared link, then we need to discard all PC
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||||
relative relocs against symbols defined in a regular object. We
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||||
allocated space for them in the check_relocs routine, but we will not
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||||
fill them in in the relocate_section routine. */
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||||
if (info->shared && info->symbolic)
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||||
elf_m68k_link_hash_traverse (elf_m68k_hash_table (info),
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||||
elf_m68k_discard_copies,
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||||
(PTR) NULL);
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||||
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||||
/* The check_relocs and adjust_dynamic_symbol entry points have
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||||
determined the sizes of the various dynamic sections. Allocate
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||||
memory for them. */
|
||||
|
@ -733,13 +899,17 @@ elf_m68k_size_dynamic_sections (output_bfd, info)
|
|||
than .rela.plt. */
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||||
if (strcmp (name, ".rela.plt") != 0)
|
||||
{
|
||||
const char *outname;
|
||||
|
||||
relocs = true;
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||||
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||||
/* If this relocation section applies to a read only
|
||||
section, then we probably need a DT_TEXTREL
|
||||
entry. .rela.plt is actually associated with
|
||||
.got.plt, which is never readonly. */
|
||||
target = bfd_get_section_by_name (output_bfd, name + 5);
|
||||
outname = bfd_get_section_name (output_bfd,
|
||||
s->output_section);
|
||||
target = bfd_get_section_by_name (output_bfd, outname + 5);
|
||||
if (target != NULL
|
||||
&& (target->flags & SEC_READONLY) != 0)
|
||||
reltext = true;
|
||||
|
@ -817,6 +987,30 @@ elf_m68k_size_dynamic_sections (output_bfd, info)
|
|||
return true;
|
||||
}
|
||||
|
||||
/* This function is called via elf_m68k_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. */
|
||||
|
||||
/*ARGSUSED*/
|
||||
static boolean
|
||||
elf_m68k_discard_copies (h, ignore)
|
||||
struct elf_m68k_link_hash_entry *h;
|
||||
PTR ignore;
|
||||
{
|
||||
struct elf_m68k_pcrel_relocs_copied *s;
|
||||
|
||||
/* We only discard relocs for symbols defined in a regular object. */
|
||||
if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||||
return true;
|
||||
|
||||
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
||||
s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Relocate an M68K ELF section. */
|
||||
|
||||
static boolean
|
||||
|
@ -935,7 +1129,7 @@ elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
|
|||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||||
|| (info->shared
|
||||
&& (! info->symbolic
|
||||
&& ((! info->symbolic && h->dynindx != -1)
|
||||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||||
&& (input_section->flags & SEC_ALLOC) != 0
|
||||
|
@ -1149,7 +1343,7 @@ elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
|
|||
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
|
||||
{
|
||||
Elf_Internal_Rela outrel;
|
||||
int relocate;
|
||||
boolean skip, relocate;
|
||||
|
||||
/* When generating a shared object, these relocations
|
||||
are copied into the output file to be resolved at run
|
||||
|
@ -1175,13 +1369,38 @@ elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
|
|||
BFD_ASSERT (sreloc != NULL);
|
||||
}
|
||||
|
||||
outrel.r_offset = (rel->r_offset
|
||||
+ input_section->output_section->vma
|
||||
+ input_section->output_offset);
|
||||
if (h != NULL
|
||||
&& (! info->symbolic
|
||||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||||
skip = false;
|
||||
|
||||
if (elf_section_data (input_section)->stab_info == NULL)
|
||||
outrel.r_offset = rel->r_offset;
|
||||
else
|
||||
{
|
||||
bfd_vma off;
|
||||
|
||||
off = (_bfd_stab_section_offset
|
||||
(output_bfd, &elf_hash_table (info)->stab_info,
|
||||
input_section,
|
||||
&elf_section_data (input_section)->stab_info,
|
||||
rel->r_offset));
|
||||
if (off == (bfd_vma) -1)
|
||||
skip = true;
|
||||
outrel.r_offset = off;
|
||||
}
|
||||
|
||||
outrel.r_offset += (input_section->output_section->vma
|
||||
+ input_section->output_offset);
|
||||
|
||||
if (skip)
|
||||
{
|
||||
memset (&outrel, 0, sizeof outrel);
|
||||
relocate = false;
|
||||
}
|
||||
/* h->dynindx may be -1 if the symbol was marked to
|
||||
become local. */
|
||||
else if (h != NULL
|
||||
&& ((! info->symbolic && h->dynindx != -1)
|
||||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||||
{
|
||||
BFD_ASSERT (h->dynindx != -1);
|
||||
relocate = false;
|
||||
|
@ -1585,6 +1804,8 @@ elf_m68k_finish_dynamic_sections (output_bfd, info)
|
|||
#define ELF_MAXPAGESIZE 0x2000
|
||||
#define elf_backend_create_dynamic_sections \
|
||||
_bfd_elf_create_dynamic_sections
|
||||
#define bfd_elf32_bfd_link_hash_table_create \
|
||||
elf_m68k_link_hash_table_create
|
||||
#define elf_backend_check_relocs elf_m68k_check_relocs
|
||||
#define elf_backend_adjust_dynamic_symbol \
|
||||
elf_m68k_adjust_dynamic_symbol
|
||||
|
|
|
@ -691,14 +691,11 @@ elf32_sparc_adjust_dynamic_symbol (info, h)
|
|||
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
||||
BFD_ASSERT (s != NULL);
|
||||
|
||||
/* If the symbol is currently defined in the .bss section of the
|
||||
dynamic object, then it is OK to simply initialize it to zero.
|
||||
If the symbol is in some other section, we must generate a
|
||||
R_SPARC_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 .rel.bss section
|
||||
we are going to use. */
|
||||
if ((h->root.u.def.section->flags & SEC_LOAD) != 0)
|
||||
/* We must generate a R_SPARC_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
|
||||
.rel.bss section we are going to use. */
|
||||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||||
{
|
||||
asection *srel;
|
||||
|
||||
|
@ -908,8 +905,7 @@ elf32_sparc_size_dynamic_sections (output_bfd, info)
|
|||
for (s = output_bfd->sections; s != NULL; s = s->next)
|
||||
{
|
||||
if ((s->flags & SEC_LINKER_CREATED) != 0
|
||||
|| (s->flags & SEC_ALLOC) == 0
|
||||
|| (s->flags & SEC_LOAD) == 0)
|
||||
|| (s->flags & SEC_ALLOC) == 0)
|
||||
continue;
|
||||
|
||||
elf_section_data (s)->dynindx = c + 1;
|
||||
|
@ -1058,7 +1054,7 @@ elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
|
|||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||||
|| (info->shared
|
||||
&& (! info->symbolic
|
||||
&& ((! info->symbolic && h->dynindx != -1)
|
||||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||||
&& (r_type == R_SPARC_8
|
||||
|
@ -1252,6 +1248,7 @@ elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
|
|||
if (info->shared)
|
||||
{
|
||||
Elf_Internal_Rela outrel;
|
||||
boolean skip;
|
||||
|
||||
/* When generating a shared object, these relocations
|
||||
are copied into the output file to be resolved at run
|
||||
|
@ -1277,15 +1274,35 @@ elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
|
|||
BFD_ASSERT (sreloc != NULL);
|
||||
}
|
||||
|
||||
outrel.r_offset = (rel->r_offset
|
||||
+ input_section->output_section->vma
|
||||
+ input_section->output_offset);
|
||||
skip = false;
|
||||
|
||||
if (elf_section_data (input_section)->stab_info == NULL)
|
||||
outrel.r_offset = rel->r_offset;
|
||||
else
|
||||
{
|
||||
bfd_vma off;
|
||||
|
||||
off = (_bfd_stab_section_offset
|
||||
(output_bfd, &elf_hash_table (info)->stab_info,
|
||||
input_section,
|
||||
&elf_section_data (input_section)->stab_info,
|
||||
rel->r_offset));
|
||||
if (off == (bfd_vma) -1)
|
||||
skip = true;
|
||||
outrel.r_offset = off;
|
||||
}
|
||||
|
||||
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. */
|
||||
if (h != NULL
|
||||
&& ((! info->symbolic && h->dynindx != -1)
|
||||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||||
else if (h != NULL
|
||||
&& ((! info->symbolic && h->dynindx != -1)
|
||||
|| (h->elf_link_hash_flags
|
||||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||||
{
|
||||
BFD_ASSERT (h->dynindx != -1);
|
||||
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
||||
|
@ -1340,9 +1357,14 @@ elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
|
|||
++sreloc->reloc_count;
|
||||
|
||||
/* This reloc will be computed at runtime, so there's no
|
||||
need to do anything now. */
|
||||
continue;
|
||||
need to do anything now, unless this is a RELATIVE
|
||||
reloc in an unallocated section. */
|
||||
if (skip
|
||||
|| (input_section->flags & SEC_ALLOC) != 0
|
||||
|| ELF32_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE)
|
||||
continue;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
|
|
Loading…
Reference in New Issue