diff options
Diffstat (limited to 'contrib/binutils/bfd/elf64-s390.c')
| -rw-r--r-- | contrib/binutils/bfd/elf64-s390.c | 2392 |
1 files changed, 0 insertions, 2392 deletions
diff --git a/contrib/binutils/bfd/elf64-s390.c b/contrib/binutils/bfd/elf64-s390.c deleted file mode 100644 index 40f4908dcf39..000000000000 --- a/contrib/binutils/bfd/elf64-s390.c +++ /dev/null @@ -1,2392 +0,0 @@ -/* IBM S/390-specific support for 64-bit ELF - Copyright 2000, 2001, 2002 Free Software Foundation, Inc. - Contributed Martin Schwidefsky (schwidefsky@de.ibm.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 2 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., 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "bfdlink.h" -#include "libbfd.h" -#include "elf-bfd.h" - -static reloc_howto_type *elf_s390_reloc_type_lookup - PARAMS ((bfd *, bfd_reloc_code_real_type)); -static void elf_s390_info_to_howto - PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); -static boolean elf_s390_is_local_label_name - PARAMS ((bfd *, const char *)); -static struct bfd_hash_entry *link_hash_newfunc - PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); -static struct bfd_link_hash_table *elf_s390_link_hash_table_create - PARAMS ((bfd *)); -static boolean create_got_section - PARAMS((bfd *, struct bfd_link_info *)); -static boolean elf_s390_create_dynamic_sections - PARAMS((bfd *, struct bfd_link_info *)); -static void elf_s390_copy_indirect_symbol - PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *)); -static boolean elf_s390_check_relocs - PARAMS ((bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *)); -static asection *elf_s390_gc_mark_hook - PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); -static boolean elf_s390_gc_sweep_hook - PARAMS ((bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *)); -static boolean elf_s390_adjust_dynamic_symbol - PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); -static boolean allocate_dynrelocs - PARAMS ((struct elf_link_hash_entry *, PTR)); -static boolean readonly_dynrelocs - PARAMS ((struct elf_link_hash_entry *, PTR)); -static boolean elf_s390_size_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); -static boolean elf_s390_relocate_section - PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, - Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); -static boolean elf_s390_finish_dynamic_symbol - PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, - Elf_Internal_Sym *)); -static enum elf_reloc_type_class elf_s390_reloc_type_class - PARAMS ((const Elf_Internal_Rela *)); -static boolean elf_s390_finish_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); -static boolean elf_s390_object_p PARAMS ((bfd *)); - -#define USE_RELA 1 /* We want RELA relocations, not REL. */ - -#include "elf/s390.h" - -/* In case we're on a 32-bit machine, construct a 64-bit "-1" value - from smaller values. Start with zero, widen, *then* decrement. */ -#define MINUS_ONE (((bfd_vma)0) - 1) - -/* The relocation "howto" table. */ -static reloc_howto_type elf_howto_table[] = -{ - HOWTO (R_390_NONE, /* 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_390_NONE", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO(R_390_8, 0, 0, 8, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_8", false, 0,0x000000ff, false), - HOWTO(R_390_12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_12", false, 0,0x00000fff, false), - HOWTO(R_390_16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_16", false, 0,0x0000ffff, false), - HOWTO(R_390_32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_32", false, 0,0xffffffff, false), - HOWTO(R_390_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32", false, 0,0xffffffff, true), - HOWTO(R_390_GOT12, 0, 1, 12, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_390_GOT12", false, 0,0x00000fff, false), - HOWTO(R_390_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT32", false, 0,0xffffffff, false), - HOWTO(R_390_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32", false, 0,0xffffffff, true), - HOWTO(R_390_COPY, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", false, 0,MINUS_ONE, false), - HOWTO(R_390_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT",false, 0,MINUS_ONE, false), - HOWTO(R_390_JMP_SLOT, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT",false, 0,MINUS_ONE, false), - HOWTO(R_390_RELATIVE, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",false, 0,MINUS_ONE, false), - HOWTO(R_390_GOTOFF, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", false, 0,MINUS_ONE, false), - HOWTO(R_390_GOTPC, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,MINUS_ONE, true), - HOWTO(R_390_GOT16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT16", false, 0,0x0000ffff, false), - HOWTO(R_390_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16", false, 0,0x0000ffff, true), - HOWTO(R_390_PC16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC16DBL", false, 0,0x0000ffff, true), - HOWTO(R_390_PLT16DBL, 1, 1, 16, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT16DBL", false, 0,0x0000ffff, true), - HOWTO(R_390_PC32DBL, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC32DBL", false, 0,0xffffffff, true), - HOWTO(R_390_PLT32DBL, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT32DBL", false, 0,0xffffffff, true), - HOWTO(R_390_GOTPCDBL, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPCDBL", false, 0,MINUS_ONE, true), - HOWTO(R_390_64, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_64", false, 0,MINUS_ONE, false), - HOWTO(R_390_PC64, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PC64", false, 0,MINUS_ONE, true), - HOWTO(R_390_GOT64, 0, 4, 64, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOT64", false, 0,MINUS_ONE, false), - HOWTO(R_390_PLT64, 0, 4, 64, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_PLT64", false, 0,MINUS_ONE, true), - HOWTO(R_390_GOTENT, 1, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTENT", false, 0,MINUS_ONE, true), -}; - -/* GNU extension to record C++ vtable hierarchy. */ -static reloc_howto_type elf64_s390_vtinherit_howto = - HOWTO (R_390_GNU_VTINHERIT, 0,4,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false); -static reloc_howto_type elf64_s390_vtentry_howto = - HOWTO (R_390_GNU_VTENTRY, 0,4,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", false,0,0, false); - -static reloc_howto_type * -elf_s390_reloc_type_lookup (abfd, code) - bfd *abfd ATTRIBUTE_UNUSED; - bfd_reloc_code_real_type code; -{ - switch (code) - { - case BFD_RELOC_NONE: - return &elf_howto_table[(int) R_390_NONE]; - case BFD_RELOC_8: - return &elf_howto_table[(int) R_390_8]; - case BFD_RELOC_390_12: - return &elf_howto_table[(int) R_390_12]; - case BFD_RELOC_16: - return &elf_howto_table[(int) R_390_16]; - case BFD_RELOC_32: - return &elf_howto_table[(int) R_390_32]; - case BFD_RELOC_CTOR: - return &elf_howto_table[(int) R_390_32]; - case BFD_RELOC_32_PCREL: - return &elf_howto_table[(int) R_390_PC32]; - case BFD_RELOC_390_GOT12: - return &elf_howto_table[(int) R_390_GOT12]; - case BFD_RELOC_32_GOT_PCREL: - return &elf_howto_table[(int) R_390_GOT32]; - case BFD_RELOC_390_PLT32: - return &elf_howto_table[(int) R_390_PLT32]; - case BFD_RELOC_390_COPY: - return &elf_howto_table[(int) R_390_COPY]; - case BFD_RELOC_390_GLOB_DAT: - return &elf_howto_table[(int) R_390_GLOB_DAT]; - case BFD_RELOC_390_JMP_SLOT: - return &elf_howto_table[(int) R_390_JMP_SLOT]; - case BFD_RELOC_390_RELATIVE: - return &elf_howto_table[(int) R_390_RELATIVE]; - case BFD_RELOC_32_GOTOFF: - return &elf_howto_table[(int) R_390_GOTOFF]; - case BFD_RELOC_390_GOTPC: - return &elf_howto_table[(int) R_390_GOTPC]; - case BFD_RELOC_390_GOT16: - return &elf_howto_table[(int) R_390_GOT16]; - case BFD_RELOC_16_PCREL: - return &elf_howto_table[(int) R_390_PC16]; - case BFD_RELOC_390_PC16DBL: - return &elf_howto_table[(int) R_390_PC16DBL]; - case BFD_RELOC_390_PLT16DBL: - return &elf_howto_table[(int) R_390_PLT16DBL]; - case BFD_RELOC_VTABLE_INHERIT: - return &elf64_s390_vtinherit_howto; - case BFD_RELOC_VTABLE_ENTRY: - return &elf64_s390_vtentry_howto; - case BFD_RELOC_390_PC32DBL: - return &elf_howto_table[(int) R_390_PC32DBL]; - case BFD_RELOC_390_PLT32DBL: - return &elf_howto_table[(int) R_390_PLT32DBL]; - case BFD_RELOC_390_GOTPCDBL: - return &elf_howto_table[(int) R_390_GOTPCDBL]; - case BFD_RELOC_64: - return &elf_howto_table[(int) R_390_64]; - case BFD_RELOC_64_PCREL: - return &elf_howto_table[(int) R_390_PC64]; - case BFD_RELOC_390_GOT64: - return &elf_howto_table[(int) R_390_GOT64]; - case BFD_RELOC_390_PLT64: - return &elf_howto_table[(int) R_390_PLT64]; - case BFD_RELOC_390_GOTENT: - return &elf_howto_table[(int) R_390_GOTENT]; - default: - break; - } - return 0; -} - -/* We need to use ELF64_R_TYPE so we have our own copy of this function, - and elf64-s390.c has its own copy. */ - -static void -elf_s390_info_to_howto (abfd, cache_ptr, dst) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *cache_ptr; - Elf_Internal_Rela *dst; -{ - switch (ELF64_R_TYPE(dst->r_info)) - { - case R_390_GNU_VTINHERIT: - cache_ptr->howto = &elf64_s390_vtinherit_howto; - break; - - case R_390_GNU_VTENTRY: - cache_ptr->howto = &elf64_s390_vtentry_howto; - break; - - default: - BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max); - cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)]; - } -} - -static boolean -elf_s390_is_local_label_name (abfd, name) - bfd *abfd; - const char *name; -{ - if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) - return true; - - return _bfd_elf_is_local_label_name (abfd, name); -} - -/* Functions for the 390 ELF linker. */ - -/* The name of the dynamic interpreter. This is put in the .interp - section. */ - -#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" - -/* The size in bytes of the first entry in the procedure linkage table. */ -#define PLT_FIRST_ENTRY_SIZE 32 -/* The size in bytes of an entry in the procedure linkage table. */ -#define PLT_ENTRY_SIZE 32 - -#define GOT_ENTRY_SIZE 8 - -/* The first three entries in a procedure linkage table are reserved, - and the initial contents are unimportant (we zero them out). - Subsequent entries look like this. See the SVR4 ABI 386 - supplement to see how this works. */ - -/* For the s390, simple addr offset can only be 0 - 4096. - To use the full 16777216 TB address space, several instructions - are needed to load an address in a register and execute - a branch( or just saving the address) - - Furthermore, only r 0 and 1 are free to use!!! */ - -/* The first 3 words in the GOT are then reserved. - Word 0 is the address of the dynamic table. - Word 1 is a pointer to a structure describing the object - Word 2 is used to point to the loader entry address. - - The code for PLT entries looks like this: - - The GOT holds the address in the PLT to be executed. - The loader then gets: - 24(15) = Pointer to the structure describing the object. - 28(15) = Offset in symbol table - The loader must then find the module where the function is - and insert the address in the GOT. - - PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 - LG 1,0(1) # 6 bytes Load address from GOT in r1 - BCR 15,1 # 2 bytes Jump to address - RET1: BASR 1,0 # 2 bytes Return from GOT 1st time - LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 - BRCL 15,-x # 6 bytes Jump to start of PLT - .long ? # 4 bytes offset into symbol table - - Total = 32 bytes per PLT entry - Fixup at offset 2: relative address to GOT entry - Fixup at offset 22: relative branch to PLT0 - Fixup at offset 28: 32 bit offset into symbol table - - A 32 bit offset into the symbol table is enough. It allows for symbol - tables up to a size of 2 gigabyte. A single dynamic object (the main - program, any shared library) is limited to 4GB in size and I want to see - the program that manages to have a symbol table of more than 2 GB with a - total size of at max 4 GB. */ - -#define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000 -#define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310 -#define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004 -#define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10 -#define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c -#define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4 -#define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000 -#define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000 - -/* The first PLT entry pushes the offset into the symbol table - from R1 onto the stack at 8(15) and the loader object info - at 12(15), loads the loader address in R1 and jumps to it. */ - -/* The first entry in the PLT: - - PLT0: - STG 1,56(15) # r1 contains the offset into the symbol table - LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table - MVC 48(8,15),8(1) # move loader ino (object struct address) to stack - LG 1,16(1) # get entry address of loader - BCR 15,1 # jump to loader - - Fixup at offset 8: relative address to start of GOT. */ - -#define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038 -#define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010 -#define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000 -#define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030 -#define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310 -#define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004 -#define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700 -#define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700 - -/* The s390 linker needs to keep track of the number of relocs that it - decides to copy as dynamic relocs in check_relocs for each symbol. - This is so that it can later discard them if they are found to be - unnecessary. We store the information in a field extending the - regular ELF linker hash table. */ - -struct elf_s390_dyn_relocs -{ - struct elf_s390_dyn_relocs *next; - - /* The input section of the reloc. */ - asection *sec; - - /* Total number of relocs copied for the input section. */ - bfd_size_type count; - - /* Number of pc-relative relocs copied for the input section. */ - bfd_size_type pc_count; -}; - -/* s390 ELF linker hash entry. */ - -struct elf_s390_link_hash_entry -{ - struct elf_link_hash_entry elf; - - /* Track dynamic relocs copied for this symbol. */ - struct elf_s390_dyn_relocs *dyn_relocs; -}; - -/* s390 ELF linker hash table. */ - -struct elf_s390_link_hash_table -{ - struct elf_link_hash_table elf; - - /* Short-cuts to get to dynamic linker sections. */ - asection *sgot; - asection *sgotplt; - asection *srelgot; - asection *splt; - asection *srelplt; - asection *sdynbss; - asection *srelbss; - - /* Small local sym to section mapping cache. */ - struct sym_sec_cache sym_sec; -}; - -/* Get the s390 ELF linker hash table from a link_info structure. */ - -#define elf_s390_hash_table(p) \ - ((struct elf_s390_link_hash_table *) ((p)->hash)) - -/* Create an entry in an s390 ELF linker hash table. */ - -static struct bfd_hash_entry * -link_hash_newfunc (entry, table, string) - struct bfd_hash_entry *entry; - struct bfd_hash_table *table; - const char *string; -{ - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (entry == NULL) - { - entry = bfd_hash_allocate (table, - sizeof (struct elf_s390_link_hash_entry)); - if (entry == NULL) - return entry; - } - - /* Call the allocation method of the superclass. */ - entry = _bfd_elf_link_hash_newfunc (entry, table, string); - if (entry != NULL) - { - struct elf_s390_link_hash_entry *eh; - - eh = (struct elf_s390_link_hash_entry *) entry; - eh->dyn_relocs = NULL; - } - - return entry; -} - -/* Create an s390 ELF linker hash table. */ - -static struct bfd_link_hash_table * -elf_s390_link_hash_table_create (abfd) - bfd *abfd; -{ - struct elf_s390_link_hash_table *ret; - bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); - - ret = (struct elf_s390_link_hash_table *) bfd_alloc (abfd, amt); - if (ret == NULL) - return NULL; - - if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) - { - bfd_release (abfd, ret); - return NULL; - } - - ret->sgot = NULL; - ret->sgotplt = NULL; - ret->srelgot = NULL; - ret->splt = NULL; - ret->srelplt = NULL; - ret->sdynbss = NULL; - ret->srelbss = NULL; - ret->sym_sec.abfd = NULL; - - return &ret->elf.root; -} - -/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up - shortcuts to them in our hash table. */ - -static boolean -create_got_section (dynobj, info) - bfd *dynobj; - struct bfd_link_info *info; -{ - struct elf_s390_link_hash_table *htab; - - if (! _bfd_elf_create_got_section (dynobj, info)) - return false; - - htab = elf_s390_hash_table (info); - htab->sgot = bfd_get_section_by_name (dynobj, ".got"); - htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); - if (!htab->sgot || !htab->sgotplt) - abort (); - - htab->srelgot = bfd_make_section (dynobj, ".rela.got"); - if (htab->srelgot == NULL - || ! bfd_set_section_flags (dynobj, htab->srelgot, - (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS - | SEC_IN_MEMORY | SEC_LINKER_CREATED - | SEC_READONLY)) - || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) - return false; - return true; -} - -/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and - .rela.bss sections in DYNOBJ, and set up shortcuts to them in our - hash table. */ - -static boolean -elf_s390_create_dynamic_sections (dynobj, info) - bfd *dynobj; - struct bfd_link_info *info; -{ - struct elf_s390_link_hash_table *htab; - - htab = elf_s390_hash_table (info); - if (!htab->sgot && !create_got_section (dynobj, info)) - return false; - - if (!_bfd_elf_create_dynamic_sections (dynobj, info)) - return false; - - htab->splt = bfd_get_section_by_name (dynobj, ".plt"); - htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); - htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); - if (!info->shared) - htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); - - if (!htab->splt || !htab->srelplt || !htab->sdynbss - || (!info->shared && !htab->srelbss)) - abort (); - - return true; -} - -/* Copy the extra info we tack onto an elf_link_hash_entry. */ - -static void -elf_s390_copy_indirect_symbol (dir, ind) - struct elf_link_hash_entry *dir, *ind; -{ - struct elf_s390_link_hash_entry *edir, *eind; - - edir = (struct elf_s390_link_hash_entry *) dir; - eind = (struct elf_s390_link_hash_entry *) ind; - - if (eind->dyn_relocs != NULL) - { - if (edir->dyn_relocs != NULL) - { - struct elf_s390_dyn_relocs **pp; - struct elf_s390_dyn_relocs *p; - - if (ind->root.type == bfd_link_hash_indirect) - abort (); - - /* Add reloc counts against the weak sym to the strong sym - list. Merge any entries against the same section. */ - for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) - { - struct elf_s390_dyn_relocs *q; - - for (q = edir->dyn_relocs; q != NULL; q = q->next) - if (q->sec == p->sec) - { - q->pc_count += p->pc_count; - q->count += p->count; - *pp = p->next; - break; - } - if (q == NULL) - pp = &p->next; - } - *pp = edir->dyn_relocs; - } - - edir->dyn_relocs = eind->dyn_relocs; - eind->dyn_relocs = NULL; - } - - _bfd_elf_link_hash_copy_indirect (dir, ind); -} - -/* Look through the relocs for a section during the first phase, and - allocate space in the global offset table or procedure linkage - table. */ - -static boolean -elf_s390_check_relocs (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; -{ - struct elf_s390_link_hash_table *htab; - 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 (info->relocateable) - return true; - - htab = elf_s390_hash_table (info); - 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 = ELF64_R_SYM (rel->r_info); - - if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) - { - (*_bfd_error_handler) (_("%s: bad symbol index: %d"), - bfd_archive_filename (abfd), - r_symndx); - return false; - } - - if (r_symndx < symtab_hdr->sh_info) - h = NULL; - else - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - - switch (ELF64_R_TYPE (rel->r_info)) - { - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - case R_390_GOT64: - case R_390_GOTENT: - /* This symbol requires a global offset table entry. */ - if (h != NULL) - { - h->got.refcount += 1; - } - 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); - 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; - } - local_got_refcounts[r_symndx] += 1; - } - /* Fall through */ - - case R_390_GOTOFF: - case R_390_GOTPC: - case R_390_GOTPCDBL: - if (htab->sgot == NULL) - { - if (htab->elf.dynobj == NULL) - htab->elf.dynobj = abfd; - if (!create_got_section (htab->elf.dynobj, info)) - return false; - } - break; - - case R_390_PLT16DBL: - case R_390_PLT32: - case R_390_PLT32DBL: - case R_390_PLT64: - /* 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. */ - - /* If this is a local symbol, we resolve it directly without - creating a procedure linkage table entry. */ - if (h == NULL) - continue; - - h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; - h->plt.refcount += 1; - break; - - case R_390_8: - case R_390_16: - case R_390_32: - case R_390_64: - case R_390_PC16: - case R_390_PC16DBL: - case R_390_PC32: - case R_390_PC32DBL: - case R_390_PC64: - if (h != NULL && !info->shared) - { - /* If this reloc is in a read-only section, we might - need a copy reloc. We can't check reliably at this - stage whether the section is read-only, as input - sections have not yet been mapped to output sections. - Tentatively set the flag for now, and correct in - adjust_dynamic_symbol. */ - h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; - - /* We may need a .plt entry if the function this reloc - refers to is in a shared lib. */ - h->plt.refcount += 1; - } - - /* If we are creating a shared library, and this is a reloc - against a global symbol, or a non PC relative reloc - against a local symbol, then we need to copy the reloc - into the shared library. However, if we are linking with - -Bsymbolic, we do not need to copy a reloc against a - global symbol which is defined in an object we are - including in the link (i.e., DEF_REGULAR is set). 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). In case of a weak definition, - DEF_REGULAR may be cleared later by a strong definition in - a shared library. We account for that possibility below by - storing information in the relocs_copied field of the hash - table entry. A similar situation occurs when creating - shared libraries and symbol visibility changes render the - symbol local. - - If on the other hand, we are creating an executable, we - may need to keep relocations for symbols satisfied by a - dynamic library if we manage to avoid copy relocs for the - symbol. */ - if ((info->shared - && (sec->flags & SEC_ALLOC) != 0 - && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 - && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL - && ELF64_R_TYPE (rel->r_info) != R_390_PC32 - && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL - && ELF64_R_TYPE (rel->r_info) != R_390_PC64) - || (h != NULL - && (! info->symbolic - || h->root.type == bfd_link_hash_defweak - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)))) - || (!info->shared - && (sec->flags & SEC_ALLOC) != 0 - && h != NULL - && (h->root.type == bfd_link_hash_defweak - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0))) - { - struct elf_s390_dyn_relocs *p; - struct elf_s390_dyn_relocs **head; - - /* We must copy these reloc types into the output file. - Create a reloc section in dynobj and make room for - this reloc. */ - if (sreloc == NULL) - { - const char *name; - bfd *dynobj; - - name = (bfd_elf_string_from_elf_section - (abfd, - elf_elfheader (abfd)->e_shstrndx, - elf_section_data (sec)->rel_hdr.sh_name)); - if (name == NULL) - return false; - - if (strncmp (name, ".rela", 5) != 0 - || strcmp (bfd_get_section_name (abfd, sec), - name + 5) != 0) - { - (*_bfd_error_handler) - (_("%s: bad relocation section name `%s\'"), - bfd_archive_filename (abfd), name); - } - - if (htab->elf.dynobj == NULL) - htab->elf.dynobj = abfd; - - dynobj = htab->elf.dynobj; - sreloc = bfd_get_section_by_name (dynobj, name); - if (sreloc == NULL) - { - flagword flags; - - sreloc = bfd_make_section (dynobj, name); - flags = (SEC_HAS_CONTENTS | SEC_READONLY - | SEC_IN_MEMORY | SEC_LINKER_CREATED); - if ((sec->flags & SEC_ALLOC) != 0) - flags |= SEC_ALLOC | SEC_LOAD; - if (sreloc == NULL - || ! bfd_set_section_flags (dynobj, sreloc, flags) - || ! bfd_set_section_alignment (dynobj, sreloc, 2)) - return false; - } - elf_section_data (sec)->sreloc = sreloc; - } - - /* If this is a global symbol, we count the number of - relocations we need for this symbol. */ - if (h != NULL) - { - head = &((struct elf_s390_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; - s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, - sec, r_symndx); - if (s == NULL) - return false; - - head = ((struct elf_s390_dyn_relocs **) - &elf_section_data (s)->local_dynrel); - } - - p = *head; - if (p == NULL || p->sec != sec) - { - bfd_size_type amt = sizeof *p; - p = ((struct elf_s390_dyn_relocs *) - bfd_alloc (htab->elf.dynobj, amt)); - if (p == NULL) - return false; - p->next = *head; - *head = p; - p->sec = sec; - p->count = 0; - p->pc_count = 0; - } - - p->count += 1; - if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 - || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL - || ELF64_R_TYPE (rel->r_info) == R_390_PC32 - || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL - || ELF64_R_TYPE (rel->r_info) == R_390_PC64) - p->pc_count += 1; - } - break; - - /* This relocation describes the C++ object vtable hierarchy. - Reconstruct it for later use during GC. */ - case R_390_GNU_VTINHERIT: - if (!_bfd_elf64_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_390_GNU_VTENTRY: - if (!_bfd_elf64_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_s390_gc_mark_hook (abfd, info, rel, h, sym) - bfd *abfd; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; -{ - if (h != NULL) - { - switch (ELF64_R_TYPE (rel->r_info)) - { - case R_390_GNU_VTINHERIT: - case R_390_GNU_VTENTRY: - break; - - default: - switch (h->root.type) - { - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - return h->root.u.def.section; - - case bfd_link_hash_common: - return h->root.u.c.p->section; - - default: - break; - } - } - } - else - { - return bfd_section_from_elf_index (abfd, sym->st_shndx); - } - - return NULL; -} - -/* Update the got entry reference counts for the section being removed. */ - -static boolean -elf_s390_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; -{ - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel, *relend; - unsigned long r_symndx; - struct elf_link_hash_entry *h; - - elf_section_data (sec)->local_dynrel = NULL; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); - - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) - switch (ELF64_R_TYPE (rel->r_info)) - { - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - case R_390_GOT64: - case R_390_GOTOFF: - case R_390_GOTPC: - case R_390_GOTPCDBL: - case R_390_GOTENT: - r_symndx = ELF64_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - if (h->got.refcount > 0) - h->got.refcount -= 1; - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; - - case R_390_8: - case R_390_12: - case R_390_16: - case R_390_32: - case R_390_64: - case R_390_PC16: - case R_390_PC16DBL: - case R_390_PC32: - case R_390_PC32DBL: - case R_390_PC64: - r_symndx = ELF64_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - struct elf_s390_link_hash_entry *eh; - struct elf_s390_dyn_relocs **pp; - struct elf_s390_dyn_relocs *p; - - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - - if (!info->shared && h->plt.refcount > 0) - h->plt.refcount -= 1; - - eh = (struct elf_s390_link_hash_entry *) h; - - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) - if (p->sec == sec) - { - if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 - || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL - || ELF64_R_TYPE (rel->r_info) == R_390_PC32) - p->pc_count -= 1; - p->count -= 1; - if (p->count == 0) - *pp = p->next; - break; - } - } - break; - - case R_390_PLT16DBL: - case R_390_PLT32: - case R_390_PLT32DBL: - case R_390_PLT64: - r_symndx = ELF64_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - break; - - default: - break; - } - - return true; -} - -/* 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 boolean -elf_s390_adjust_dynamic_symbol (info, h) - struct bfd_link_info *info; - struct elf_link_hash_entry *h; -{ - struct elf_s390_link_hash_table *htab; - struct elf_s390_link_hash_entry * eh; - struct elf_s390_dyn_relocs *p; - asection *s; - unsigned int power_of_two; - - /* If this is a function, put it in the procedure linkage table. We - will fill in the contents of the procedure linkage table later - (although we could actually do it here). */ - if (h->type == STT_FUNC - || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) - { - if (h->plt.refcount <= 0 - || (! info->shared - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 - && h->root.type != bfd_link_hash_undefweak - && h->root.type != bfd_link_hash_undefined)) - { - /* This case can occur if we saw a PLT32 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 PC32 reloc instead. */ - h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; - } - - return true; - } - else - /* It's possible that we incorrectly decided a .plt reloc was - needed for an R_390_PC32 reloc to a non-function sym in - check_relocs. We can't decide accurately between function 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; - - /* 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->weakdef != NULL) - { - BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined - || h->weakdef->root.type == bfd_link_hash_defweak); - h->root.u.def.section = h->weakdef->root.u.def.section; - h->root.u.def.value = h->weakdef->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 (info->shared) - return true; - - /* If there are no references to this symbol that do not use the - GOT, we don't need to generate a copy reloc. */ - if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) - return true; - - /* If -z nocopyreloc was given, we won't generate them either. */ - if (info->nocopyreloc) - { - h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; - return true; - } - - eh = (struct elf_s390_link_hash_entry *) h; - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - s = p->sec->output_section; - if (s != NULL && (s->flags & SEC_READONLY) != 0) - break; - } - - /* If we didn't find any dynamic relocs in read-only sections, then - we'll be keeping the dynamic relocs and avoiding the copy reloc. */ - if (p == NULL) - { - h->elf_link_hash_flags &= ~ELF_LINK_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. */ - - htab = elf_s390_hash_table (info); - - /* We must generate a R_390_COPY reloc to tell the dynamic linker to - copy the initial value out of the dynamic object and into the - runtime process image. */ - if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) - { - htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); - h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; - } - - /* We need to figure out the alignment required for this symbol. I - have no idea how ELF linkers handle this. */ - power_of_two = bfd_log2 (h->size); - if (power_of_two > 3) - power_of_two = 3; - - /* Apply the required alignment. */ - s = htab->sdynbss; - s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); - if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) - { - if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) - return false; - } - - /* Define the symbol as being at this point in the section. */ - h->root.u.def.section = s; - h->root.u.def.value = s->_raw_size; - - /* Increment the section size to make room for the symbol. */ - s->_raw_size += h->size; - - return true; -} - -/* This is the condition under which elf_s390_finish_dynamic_symbol - will be called from elflink.h. If elflink.h doesn't call our - finish_dynamic_symbol routine, we'll need to do something about - initializing any .plt and .got entries in elf_s390_relocate_section. */ -#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ - ((DYN) \ - && ((INFO)->shared \ - || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ - && ((H)->dynindx != -1 \ - || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) - -/* Allocate space in .plt, .got and associated reloc sections for - dynamic relocs. */ - -static boolean -allocate_dynrelocs (h, inf) - struct elf_link_hash_entry *h; - PTR inf; -{ - struct bfd_link_info *info; - struct elf_s390_link_hash_table *htab; - struct elf_s390_link_hash_entry *eh; - struct elf_s390_dyn_relocs *p; - - if (h->root.type == bfd_link_hash_indirect) - return true; - - if (h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - info = (struct bfd_link_info *) inf; - htab = elf_s390_hash_table (info); - - if (htab->elf.dynamic_sections_created - && h->plt.refcount > 0) - { - /* Make sure this symbol is output as a dynamic symbol. - Undefined weak syms won't yet be marked as dynamic. */ - if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) - { - if (! bfd_elf64_link_record_dynamic_symbol (info, h)) - return false; - } - - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) - { - asection *s = htab->splt; - - /* If this is the first .plt entry, make room for the special - first entry. */ - if (s->_raw_size == 0) - s->_raw_size += PLT_FIRST_ENTRY_SIZE; - - h->plt.offset = s->_raw_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 (! info->shared - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) - { - h->root.u.def.section = s; - h->root.u.def.value = h->plt.offset; - } - - /* Make room for this entry. */ - s->_raw_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. */ - htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; - - /* We also need to make an entry in the .rela.plt section. */ - htab->srelplt->_raw_size += sizeof (Elf64_External_Rela); - } - else - { - h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; - } - } - else - { - h->plt.offset = (bfd_vma) -1; - h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; - } - - if (h->got.refcount > 0) - { - asection *s; - boolean dyn; - - /* Make sure this symbol is output as a dynamic symbol. - Undefined weak syms won't yet be marked as dynamic. */ - if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) - { - if (! bfd_elf64_link_record_dynamic_symbol (info, h)) - return false; - } - - s = htab->sgot; - h->got.offset = s->_raw_size; - s->_raw_size += GOT_ENTRY_SIZE; - dyn = htab->elf.dynamic_sections_created; - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) - htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); - } - else - h->got.offset = (bfd_vma) -1; - - eh = (struct elf_s390_link_hash_entry *) h; - if (eh->dyn_relocs == NULL) - return true; - - /* In the shared -Bsymbolic case, discard space allocated for - dynamic pc-relative relocs against symbols which turn out to be - defined in regular objects. For the normal shared case, discard - space for pc-relative relocs that have become local due to symbol - visibility changes. */ - - if (info->shared) - { - if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 - && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 - || info->symbolic)) - { - struct elf_s390_dyn_relocs **pp; - - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) - { - p->count -= p->pc_count; - p->pc_count = 0; - if (p->count == 0) - *pp = p->next; - else - pp = &p->next; - } - } - } - else - { - /* For the non-shared case, discard space for relocs against - symbols which turn out to need copy relocs or are not - dynamic. */ - - if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 - && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) - || (htab->elf.dynamic_sections_created - && (h->root.type == bfd_link_hash_undefweak - || h->root.type == bfd_link_hash_undefined)))) - { - /* Make sure this symbol is output as a dynamic symbol. - Undefined weak syms won't yet be marked as dynamic. */ - if (h->dynindx == -1 - && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) - { - if (! bfd_elf64_link_record_dynamic_symbol (info, h)) - return false; - } - - /* If that succeeded, we know we'll be keeping all the - relocs. */ - if (h->dynindx != -1) - goto keep; - } - - eh->dyn_relocs = NULL; - - keep: ; - } - - /* Finally, allocate space. */ - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - asection *sreloc = elf_section_data (p->sec)->sreloc; - sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); - } - - return true; -} - -/* Find any dynamic relocs that apply to read-only sections. */ - -static boolean -readonly_dynrelocs (h, inf) - struct elf_link_hash_entry *h; - PTR inf; -{ - struct elf_s390_link_hash_entry *eh; - struct elf_s390_dyn_relocs *p; - - if (h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - eh = (struct elf_s390_link_hash_entry *) h; - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - asection *s = p->sec->output_section; - - if (s != NULL && (s->flags & SEC_READONLY) != 0) - { - struct bfd_link_info *info = (struct bfd_link_info *) inf; - - info->flags |= DF_TEXTREL; - - /* Not an error, just cut short the traversal. */ - return false; - } - } - return true; -} - -/* Set the sizes of the dynamic sections. */ - -static boolean -elf_s390_size_dynamic_sections (output_bfd, info) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info; -{ - struct elf_s390_link_hash_table *htab; - bfd *dynobj; - asection *s; - boolean relocs; - bfd *ibfd; - - htab = elf_s390_hash_table (info); - dynobj = htab->elf.dynobj; - if (dynobj == NULL) - abort (); - - if (htab->elf.dynamic_sections_created) - { - /* Set the contents of the .interp section to the interpreter. */ - if (! info->shared) - { - s = bfd_get_section_by_name (dynobj, ".interp"); - if (s == NULL) - abort (); - s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; - } - } - - /* Set up .got offsets for local syms, and space for local dynamic - relocs. */ - for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) - { - bfd_signed_vma *local_got; - bfd_signed_vma *end_local_got; - bfd_size_type locsymcount; - Elf_Internal_Shdr *symtab_hdr; - asection *srela; - - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) - continue; - - for (s = ibfd->sections; s != NULL; s = s->next) - { - struct elf_s390_dyn_relocs *p; - - for (p = *((struct elf_s390_dyn_relocs **) - &elf_section_data (s)->local_dynrel); - p != NULL; - p = p->next) - { - if (!bfd_is_abs_section (p->sec) - && bfd_is_abs_section (p->sec->output_section)) - { - /* Input section has been discarded, either because - it is a copy of a linkonce section or due to - linker script /DISCARD/, so we'll be discarding - the relocs too. */ - } - else if (p->count != 0) - { - srela = elf_section_data (p->sec)->sreloc; - srela->_raw_size += p->count * sizeof (Elf64_External_Rela); - if ((p->sec->output_section->flags & SEC_READONLY) != 0) - info->flags |= DF_TEXTREL; - } - } - } - - local_got = elf_local_got_refcounts (ibfd); - if (!local_got) - continue; - - symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; - locsymcount = symtab_hdr->sh_info; - end_local_got = local_got + locsymcount; - s = htab->sgot; - srela = htab->srelgot; - for (; local_got < end_local_got; ++local_got) - { - if (*local_got > 0) - { - *local_got = s->_raw_size; - s->_raw_size += GOT_ENTRY_SIZE; - if (info->shared) - srela->_raw_size += sizeof (Elf64_External_Rela); - } - else - *local_got = (bfd_vma) -1; - } - } - - /* Allocate global sym .plt and .got entries, and space for global - sym dynamic relocs. */ - elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); - - /* We now have determined the sizes of the various dynamic sections. - Allocate memory for them. */ - relocs = false; - for (s = dynobj->sections; s != NULL; s = s->next) - { - if ((s->flags & SEC_LINKER_CREATED) == 0) - continue; - - if (s == htab->splt - || s == htab->sgot - || s == htab->sgotplt) - { - /* Strip this section if we don't need it; see the - comment below. */ - } - else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) - { - if (s->_raw_size != 0 && s != htab->srelplt) - 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 - { - /* It's not one of our sections, so don't allocate space. */ - continue; - } - - if (s->_raw_size == 0) - { - /* If we don't need this section, strip it from the - output file. This is to handle .rela.bss and - .rela.plt. We must create it in - create_dynamic_sections, because it 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. */ - - _bfd_strip_section_from_output (info, s); - continue; - } - - /* Allocate memory for the section contents. We use bfd_zalloc - here in case unused entries are not reclaimed before the - section's contents are written out. This should not happen, - but this way if it does, we get a R_390_NONE reloc instead - of garbage. */ - s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); - if (s->contents == NULL) - return false; - } - - if (htab->elf.dynamic_sections_created) - { - /* Add some entries to the .dynamic section. We fill in the - values later, in elf_s390_finish_dynamic_sections, but we - must add the entries now so that we get the correct size for - the .dynamic section. The DT_DEBUG entry is filled in by the - dynamic linker and used by the debugger. */ -#define add_dynamic_entry(TAG, VAL) \ - bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) - - if (! info->shared) - { - if (!add_dynamic_entry (DT_DEBUG, 0)) - return false; - } - - if (htab->splt->_raw_size != 0) - { - if (!add_dynamic_entry (DT_PLTGOT, 0) - || !add_dynamic_entry (DT_PLTRELSZ, 0) - || !add_dynamic_entry (DT_PLTREL, DT_RELA) - || !add_dynamic_entry (DT_JMPREL, 0)) - return false; - } - - if (relocs) - { - if (!add_dynamic_entry (DT_RELA, 0) - || !add_dynamic_entry (DT_RELASZ, 0) - || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) - return false; - - /* If any dynamic relocs apply to a read-only section, - then we need a DT_TEXTREL entry. */ - if ((info->flags & DF_TEXTREL) == 0) - elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, - (PTR) info); - - if ((info->flags & DF_TEXTREL) != 0) - { - if (!add_dynamic_entry (DT_TEXTREL, 0)) - return false; - } - } - } -#undef add_dynamic_entry - - return true; -} - -/* Relocate a 390 ELF section. */ - -static boolean -elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, - contents, relocs, local_syms, local_sections) - 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; -{ - struct elf_s390_link_hash_table *htab; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_vma *local_got_offsets; - Elf_Internal_Rela *rel; - Elf_Internal_Rela *relend; - - if (info->relocateable) - return true; - - htab = elf_s390_hash_table (info); - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (input_bfd); - local_got_offsets = elf_local_got_offsets (input_bfd); - - 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 off; - bfd_vma relocation; - boolean unresolved_reloc; - bfd_reloc_status_type r; - - r_type = ELF64_R_TYPE (rel->r_info); - if (r_type == (int) R_390_GNU_VTINHERIT - || r_type == (int) R_390_GNU_VTENTRY) - continue; - if (r_type < 0 || r_type >= (int) R_390_max) - { - bfd_set_error (bfd_error_bad_value); - return false; - } - - howto = elf_howto_table + r_type; - r_symndx = ELF64_R_SYM (rel->r_info); - h = NULL; - sym = NULL; - sec = NULL; - unresolved_reloc = false; - 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 - { - 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 (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - { - sec = h->root.u.def.section; - if (sec->output_section == NULL) - { - /* Set a flag that will be cleared later if we find a - relocation value for this symbol. output_section - is typically NULL for symbols satisfied by a shared - library. */ - unresolved_reloc = true; - relocation = 0; - } - else - relocation = (h->root.u.def.value - + sec->output_section->vma - + sec->output_offset); - } - else if (h->root.type == bfd_link_hash_undefweak) - relocation = 0; - else if (info->shared - && (!info->symbolic || info->allow_shlib_undefined) - && !info->no_undefined - && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) - relocation = 0; - else - { - if (! ((*info->callbacks->undefined_symbol) - (info, h->root.root.string, input_bfd, - input_section, rel->r_offset, - (!info->shared || info->no_undefined - || ELF_ST_VISIBILITY (h->other))))) - return false; - relocation = 0; - } - } - - switch (r_type) - { - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT32: - case R_390_GOT64: - case R_390_GOTENT: - /* Relocation is to the entry for this symbol in the global - offset table. */ - if (htab->sgot == NULL) - abort (); - - if (h != NULL) - { - boolean dyn; - - off = h->got.offset; - dyn = htab->elf.dynamic_sections_created; - if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) - || (info->shared - && (info->symbolic - || h->dynindx == -1 - || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) - { - /* This is actually a static link, or it is a - -Bsymbolic link and the symbol is defined - locally, or the symbol was forced to be local - because of a version file. We must initialize - this entry in the global offset table. Since the - offset must always be a multiple of 2, we use the - least significant bit to record whether we have - initialized it already. - - When doing a dynamic link, we create a .rel.got - relocation entry to initialize the value. This - is done in the finish_dynamic_symbol routine. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_64 (output_bfd, relocation, - htab->sgot->contents + off); - h->got.offset |= 1; - } - } - else - unresolved_reloc = false; - } - else - { - if (local_got_offsets == NULL) - abort (); - - off = local_got_offsets[r_symndx]; - - /* The offset must always be a multiple of 8. We use - the least significant bit to record whether we have - already generated the necessary reloc. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_64 (output_bfd, relocation, - htab->sgot->contents + off); - - if (info->shared) - { - asection *srelgot; - Elf_Internal_Rela outrel; - Elf64_External_Rela *loc; - - srelgot = htab->srelgot; - if (srelgot == NULL) - abort (); - - outrel.r_offset = (htab->sgot->output_section->vma - + htab->sgot->output_offset - + off); - outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); - outrel.r_addend = relocation; - loc = (Elf64_External_Rela *) srelgot->contents; - loc += srelgot->reloc_count++; - bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); - } - - local_got_offsets[r_symndx] |= 1; - } - } - - if (off >= (bfd_vma) -2) - abort (); - - relocation = htab->sgot->output_offset + off; - - /* - * For @GOTENT the relocation is against the offset between - * the instruction and the symbols entry in the GOT and not - * between the start of the GOT and the symbols entry. We - * add the vma of the GOT to get the correct value. - */ - if (r_type == R_390_GOTENT) - relocation += htab->sgot->output_section->vma; - - break; - - case R_390_GOTOFF: - /* Relocation is relative to the start of the global offset - table. */ - - /* Note that sgot->output_offset is not involved in this - calculation. We always want the start of .got. If we - defined _GLOBAL_OFFSET_TABLE in a different way, as is - permitted by the ABI, we might have to change this - calculation. */ - relocation -= htab->sgot->output_section->vma; - - break; - - case R_390_GOTPC: - case R_390_GOTPCDBL: - /* Use global offset table as symbol value. */ - relocation = htab->sgot->output_section->vma; - unresolved_reloc = false; - break; - - case R_390_PLT16DBL: - case R_390_PLT32: - case R_390_PLT32DBL: - case R_390_PLT64: - /* Relocation is to the entry for this symbol in the - procedure linkage table. */ - - /* Resolve a PLT32 reloc against a local symbol directly, - without using the procedure linkage table. */ - if (h == NULL) - break; - - if (h->plt.offset == (bfd_vma) -1 - || htab->splt == NULL) - { - /* We didn't make a PLT entry for this symbol. This - happens when statically linking PIC code, or when - using -Bsymbolic. */ - break; - } - - relocation = (htab->splt->output_section->vma - + htab->splt->output_offset - + h->plt.offset); - unresolved_reloc = false; - break; - - case R_390_8: - case R_390_16: - case R_390_32: - case R_390_64: - case R_390_PC16: - case R_390_PC16DBL: - case R_390_PC32: - case R_390_PC32DBL: - case R_390_PC64: - /* r_symndx will be zero only for relocs against symbols - from removed linkonce sections, or sections discarded by - a linker script. */ - if (r_symndx == 0 - || (input_section->flags & SEC_ALLOC) == 0) - break; - - if ((info->shared - && ((r_type != R_390_PC16 - && r_type != R_390_PC16DBL - && r_type != R_390_PC32 - && r_type != R_390_PC32DBL - && r_type != R_390_PC64) - || (h != NULL - && h->dynindx != -1 - && (! info->symbolic - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)))) - || (!info->shared - && h != NULL - && h->dynindx != -1 - && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 - && (((h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_DYNAMIC) != 0 - && (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0) - || h->root.type == bfd_link_hash_undefweak - || h->root.type == bfd_link_hash_undefined))) - { - Elf_Internal_Rela outrel; - boolean skip, relocate; - asection *sreloc; - Elf64_External_Rela *loc; - - /* When generating a shared object, these relocations - are copied into the output file to be resolved at run - time. */ - - 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; - else 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); - else if (h != NULL - && h->dynindx != -1 - && (r_type == R_390_PC16 - || r_type == R_390_PC16DBL - || r_type == R_390_PC32 - || r_type == R_390_PC32DBL - || r_type == R_390_PC64 - || !info->shared - || !info->symbolic - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)) - { - outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); - outrel.r_addend = rel->r_addend; - } - else - { - /* This symbol is local, or marked to become local. */ - relocate = true; - outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); - outrel.r_addend = relocation + rel->r_addend; - } - - sreloc = elf_section_data (input_section)->sreloc; - if (sreloc == NULL) - abort (); - - loc = (Elf64_External_Rela *) sreloc->contents; - loc += sreloc->reloc_count++; - bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); - - /* If this reloc is against an external symbol, we do - not want to fiddle with the addend. Otherwise, we - need to include the symbol value so that it becomes - an addend for the dynamic reloc. */ - if (! relocate) - continue; - } - - break; - - default: - break; - } - - if (unresolved_reloc - && !(info->shared - && (input_section->flags & SEC_DEBUGGING) != 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) - (*_bfd_error_handler) - (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), - bfd_archive_filename (input_bfd), - bfd_get_section_name (input_bfd, input_section), - (long) rel->r_offset, - h->root.root.string); - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - - if (r != bfd_reloc_ok) - { - const char *name; - - if (h != NULL) - name = h->root.root.string; - 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 (input_bfd, sec); - } - - if (r == bfd_reloc_overflow) - { - - if (! ((*info->callbacks->reloc_overflow) - (info, name, howto->name, (bfd_vma) 0, - input_bfd, input_section, rel->r_offset))) - return false; - } - else - { - (*_bfd_error_handler) - (_("%s(%s+0x%lx): reloc against `%s': error %d"), - bfd_archive_filename (input_bfd), - bfd_get_section_name (input_bfd, input_section), - (long) rel->r_offset, name, (int) r); - return false; - } - } - } - - return true; -} - -/* Finish up dynamic symbol handling. We set the contents of various - dynamic sections here. */ - -static boolean -elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) - bfd *output_bfd; - struct bfd_link_info *info; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; -{ - struct elf_s390_link_hash_table *htab; - - htab = elf_s390_hash_table (info); - - if (h->plt.offset != (bfd_vma) -1) - { - bfd_vma plt_index; - bfd_vma got_offset; - Elf_Internal_Rela rela; - Elf64_External_Rela *loc; - - /* This symbol has an entry in the procedure linkage table. Set - it up. */ - - if (h->dynindx == -1 - || htab->splt == NULL - || htab->sgotplt == NULL - || htab->srelplt == NULL) - abort (); - - /* Calc. index no. - Current offset - size first entry / entry size. */ - plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; - - /* Offset in GOT is PLT index plus GOT headers(3) times 8, - addr & GOT addr. */ - got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; - - /* Fill in the blueprint of a PLT. */ - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, - htab->splt->contents + h->plt.offset); - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, - htab->splt->contents + h->plt.offset + 4); - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, - htab->splt->contents + h->plt.offset + 8); - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, - htab->splt->contents + h->plt.offset + 12); - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, - htab->splt->contents + h->plt.offset + 16); - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5, - htab->splt->contents + h->plt.offset + 20); - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6, - htab->splt->contents + h->plt.offset + 24); - bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7, - htab->splt->contents + h->plt.offset + 28); - /* Fixup the relative address to the GOT entry */ - bfd_put_32 (output_bfd, - (htab->sgotplt->output_section->vma + - htab->sgotplt->output_offset + got_offset - - (htab->splt->output_section->vma + h->plt.offset))/2, - htab->splt->contents + h->plt.offset + 2); - /* Fixup the relative branch to PLT 0 */ - bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + - (PLT_ENTRY_SIZE * plt_index) + 22)/2, - htab->splt->contents + h->plt.offset + 24); - /* Fixup offset into symbol table */ - bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), - htab->splt->contents + h->plt.offset + 28); - - /* Fill in the entry in the global offset table. - Points to instruction after GOT offset. */ - bfd_put_64 (output_bfd, - (htab->splt->output_section->vma - + htab->splt->output_offset - + h->plt.offset - + 14), - htab->sgotplt->contents + got_offset); - - /* Fill in the entry in the .rela.plt section. */ - rela.r_offset = (htab->sgotplt->output_section->vma - + htab->sgotplt->output_offset - + got_offset); - rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); - rela.r_addend = 0; - loc = (Elf64_External_Rela *) htab->srelplt->contents + plt_index; - bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); - - if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) - { - /* Mark the symbol as undefined, rather than as defined in - the .plt section. Leave the value alone. This is a clue - for the dynamic linker, to make function pointer - comparisons work between an application and shared - library. */ - sym->st_shndx = SHN_UNDEF; - } - } - - if (h->got.offset != (bfd_vma) -1) - { - Elf_Internal_Rela rela; - Elf64_External_Rela *loc; - - /* This symbol has an entry in the global offset table. Set it - up. */ - - if (htab->sgot == NULL || htab->srelgot == NULL) - abort (); - - rela.r_offset = (htab->sgot->output_section->vma - + htab->sgot->output_offset - + (h->got.offset &~ (bfd_vma) 1)); - - /* If this is a static link, or it is a -Bsymbolic link and the - symbol is defined locally or was forced to be local because - of a version file, we just want to emit a RELATIVE reloc. - The entry in the global offset table will already have been - initialized in the relocate_section function. */ - if (info->shared - && (info->symbolic - || h->dynindx == -1 - || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) - { - BFD_ASSERT((h->got.offset & 1) != 0); - rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); - rela.r_addend = (h->root.u.def.value - + h->root.u.def.section->output_section->vma - + h->root.u.def.section->output_offset); - } - else - { - BFD_ASSERT((h->got.offset & 1) == 0); - bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); - rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); - rela.r_addend = 0; - } - - loc = (Elf64_External_Rela *) htab->srelgot->contents; - loc += htab->srelgot->reloc_count++; - bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); - } - - if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) - { - Elf_Internal_Rela rela; - Elf64_External_Rela *loc; - - /* This symbols needs a copy reloc. Set it up. */ - - if (h->dynindx == -1 - || (h->root.type != bfd_link_hash_defined - && h->root.type != bfd_link_hash_defweak) - || htab->srelbss == NULL) - abort (); - - 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 = ELF64_R_INFO (h->dynindx, R_390_COPY); - rela.r_addend = 0; - loc = (Elf64_External_Rela *) htab->srelbss->contents; - loc += htab->srelbss->reloc_count++; - bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); - } - - /* Mark some specially defined symbols as absolute. */ - if (strcmp (h->root.root.string, "_DYNAMIC") == 0 - || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 - || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) - sym->st_shndx = SHN_ABS; - - return true; -} - -/* Used to decide how to sort relocs in an optimal manner for the - dynamic linker, before writing them out. */ - -static enum elf_reloc_type_class -elf_s390_reloc_type_class (rela) - const Elf_Internal_Rela *rela; -{ - switch ((int) ELF64_R_TYPE (rela->r_info)) - { - case R_390_RELATIVE: - return reloc_class_relative; - case R_390_JMP_SLOT: - return reloc_class_plt; - case R_390_COPY: - return reloc_class_copy; - default: - return reloc_class_normal; - } -} - -/* Finish up the dynamic sections. */ - -static boolean -elf_s390_finish_dynamic_sections (output_bfd, info) - bfd *output_bfd; - struct bfd_link_info *info; -{ - struct elf_s390_link_hash_table *htab; - bfd *dynobj; - asection *sdyn; - - htab = elf_s390_hash_table (info); - dynobj = htab->elf.dynobj; - sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); - - if (htab->elf.dynamic_sections_created) - { - Elf64_External_Dyn *dyncon, *dynconend; - - if (sdyn == NULL || htab->sgot == NULL) - abort (); - - dyncon = (Elf64_External_Dyn *) sdyn->contents; - dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); - for (; dyncon < dynconend; dyncon++) - { - Elf_Internal_Dyn dyn; - asection *s; - - bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); - - switch (dyn.d_tag) - { - default: - continue; - - case DT_PLTGOT: - dyn.d_un.d_ptr = htab->sgot->output_section->vma; - break; - - case DT_JMPREL: - dyn.d_un.d_ptr = htab->srelplt->output_section->vma; - break; - - case DT_PLTRELSZ: - s = htab->srelplt->output_section; - if (s->_cooked_size != 0) - dyn.d_un.d_val = s->_cooked_size; - else - dyn.d_un.d_val = s->_raw_size; - break; - - case DT_RELASZ: - /* The procedure linkage table relocs (DT_JMPREL) should - not be included in the overall relocs (DT_RELA). - Therefore, we override the DT_RELASZ entry here to - make it not include the JMPREL relocs. Since the - linker script arranges for .rela.plt to follow all - other relocation sections, we don't have to worry - about changing the DT_RELA entry. */ - s = htab->srelplt->output_section; - if (s->_cooked_size != 0) - dyn.d_un.d_val -= s->_cooked_size; - else - dyn.d_un.d_val -= s->_raw_size; - break; - } - - bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); - } - - /* Fill in the special first entry in the procedure linkage table. */ - if (htab->splt && htab->splt->_raw_size > 0) - { - /* fill in blueprint for plt 0 entry */ - bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0, - htab->splt->contents ); - bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, - htab->splt->contents +4 ); - bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, - htab->splt->contents +12 ); - bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, - htab->splt->contents +16 ); - bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, - htab->splt->contents +20 ); - bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6, - htab->splt->contents + 24); - bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7, - htab->splt->contents + 28 ); - /* Fixup relative address to start of GOT */ - bfd_put_32 (output_bfd, - (htab->sgotplt->output_section->vma + - htab->sgotplt->output_offset - - htab->splt->output_section->vma - 6)/2, - htab->splt->contents + 8); - } - elf_section_data (htab->splt->output_section) - ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; - } - - if (htab->sgotplt) - { - /* Fill in the first three entries in the global offset table. */ - if (htab->sgotplt->_raw_size > 0) - { - bfd_put_64 (output_bfd, - (sdyn == NULL ? (bfd_vma) 0 - : sdyn->output_section->vma + sdyn->output_offset), - htab->sgotplt->contents); - /* One entry for shared object struct ptr. */ - bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); - /* One entry for _dl_runtime_resolve. */ - bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); - } - - elf_section_data (htab->sgot->output_section) - ->this_hdr.sh_entsize = 8; - } - return true; -} - -static boolean -elf_s390_object_p (abfd) - bfd *abfd; -{ - return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); -} - -/* - * Why was the hash table entry size definition changed from - * ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and - * this is the only reason for the s390_elf64_size_info structure. - */ - -const struct elf_size_info s390_elf64_size_info = -{ - sizeof (Elf64_External_Ehdr), - sizeof (Elf64_External_Phdr), - sizeof (Elf64_External_Shdr), - sizeof (Elf64_External_Rel), - sizeof (Elf64_External_Rela), - sizeof (Elf64_External_Sym), - sizeof (Elf64_External_Dyn), - sizeof (Elf_External_Note), - 8, /* hash-table entry size */ - 1, /* internal relocations per external relocations */ - 64, /* arch_size */ - 8, /* file_align */ - ELFCLASS64, EV_CURRENT, - bfd_elf64_write_out_phdrs, - bfd_elf64_write_shdrs_and_ehdr, - bfd_elf64_write_relocs, - bfd_elf64_swap_symbol_out, - bfd_elf64_slurp_reloc_table, - bfd_elf64_slurp_symbol_table, - bfd_elf64_swap_dyn_in, - bfd_elf64_swap_dyn_out, - NULL, - NULL, - NULL, - NULL -}; - -#define TARGET_BIG_SYM bfd_elf64_s390_vec -#define TARGET_BIG_NAME "elf64-s390" -#define ELF_ARCH bfd_arch_s390 -#define ELF_MACHINE_CODE EM_S390 -#define ELF_MACHINE_ALT1 EM_S390_OLD -#define ELF_MAXPAGESIZE 0x1000 - -#define elf_backend_size_info s390_elf64_size_info - -#define elf_backend_can_gc_sections 1 -#define elf_backend_can_refcount 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 24 -#define elf_backend_plt_header_size PLT_ENTRY_SIZE -#define elf_backend_rela_normal 1 - -#define elf_info_to_howto elf_s390_info_to_howto - -#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name -#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create -#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup - -#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol -#define elf_backend_check_relocs elf_s390_check_relocs -#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol -#define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections -#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections -#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol -#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook -#define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook -#define elf_backend_reloc_type_class elf_s390_reloc_type_class -#define elf_backend_relocate_section elf_s390_relocate_section -#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections -#define elf_backend_reloc_type_class elf_s390_reloc_type_class - -#define elf_backend_object_p elf_s390_object_p - -#include "elf64-target.h" |