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authorNick Clifton <nickc@redhat.com>2001-02-10 00:58:38 +0000
committerNick Clifton <nickc@redhat.com>2001-02-10 00:58:38 +0000
commita85d7ed0f0b65504f7d8027319d1a4a9adb9d8c1 (patch)
treed46823b360b1d614fb1c65de41cdc778a68984ff /bfd/elf32-s390.c
parent356d255deb0cb49d4dade90addbb7bdcde0d7e36 (diff)
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Add s390 support
Diffstat (limited to 'bfd/elf32-s390.c')
-rw-r--r--bfd/elf32-s390.c2179
1 files changed, 2179 insertions, 0 deletions
diff --git a/bfd/elf32-s390.c b/bfd/elf32-s390.c
new file mode 100644
index 0000000..313a41a
--- /dev/null
+++ b/bfd/elf32-s390.c
@@ -0,0 +1,2179 @@
+/* IBM S/390-specific support for 32-bit ELF
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ Contributed by Carl B. Pedersen and Martin Schwidefsky.
+
+ 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 *elf_s390_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 elf_s390_check_relocs
+ 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 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 boolean elf_s390_finish_dynamic_sections
+ PARAMS ((bfd *, struct bfd_link_info *));
+
+#define USE_RELA 1 /* We want RELA relocations, not REL. */
+
+#include "elf/s390.h"
+
+/* 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, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_COPY", false, 0,0xffffffff, false),
+ HOWTO(R_390_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GLOB_DAT",false, 0,0xffffffff, false),
+ HOWTO(R_390_JMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_JMP_SLOT",false, 0,0xffffffff, false),
+ HOWTO(R_390_RELATIVE, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_RELATIVE",false, 0,0xffffffff, false),
+ HOWTO(R_390_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTOFF", false, 0,0xffffffff, false),
+ HOWTO(R_390_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_390_GOTPC", false, 0,0xffffffff, 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),
+};
+
+/* GNU extension to record C++ vtable hierarchy. */
+static reloc_howto_type elf32_s390_vtinherit_howto =
+ HOWTO (R_390_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", false,0, 0, false);
+static reloc_howto_type elf32_s390_vtentry_howto =
+ HOWTO (R_390_GNU_VTENTRY, 0,2,0,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 &elf32_s390_vtinherit_howto;
+ case BFD_RELOC_VTABLE_ENTRY:
+ return &elf32_s390_vtentry_howto;
+ default:
+ break;
+ }
+ return 0;
+}
+
+/* We need to use ELF32_R_TYPE so we have our own copy of this function,
+ and elf32-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 (ELF32_R_TYPE(dst->r_info))
+ {
+ case R_390_GNU_VTINHERIT:
+ cache_ptr->howto = &elf32_s390_vtinherit_howto;
+ break;
+
+ case R_390_GNU_VTENTRY:
+ cache_ptr->howto = &elf32_s390_vtentry_howto;
+ break;
+
+ default:
+ BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
+ cache_ptr->howto = &elf_howto_table[ELF32_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 nop opcode we use. */
+
+#define s390_NOP 0x07070707
+
+
+/* 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 4
+
+/* 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 2 GB 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 position independand PLT entries looks like this:
+
+ r12 holds addr of the current GOT at entry to the PLT
+
+ 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.
+
+ Note: 390 can only address +- 64 K relative.
+ We check if offset > 65536, then make a relative branch -64xxx
+ back to a previous defined branch
+
+PLT1: BASR 1,0 # 2 bytes
+ L 1,22(1) # 4 bytes Load offset in GOT in r 1
+ L 1,(1,12) # 4 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
+ L 1,14(1) # 4 bytes Load offset in symol table in r1
+ BRC 15,-x # 4 bytes Jump to start of PLT
+ .word 0 # 2 bytes filler
+ .long ? # 4 bytes offset in GOT
+ .long ? # 4 bytes offset into symbol table
+
+ This was the general case. There are two additional, optimizes PLT
+ definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
+ First the one for GOT offsets < 4096:
+
+PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
+ BCR 15,1 # 2 bytes Jump to address
+ .word 0,0,0 # 6 bytes filler
+RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
+ L 1,14(1) # 4 bytes Load offset in symbol table in r1
+ BRC 15,-x # 4 bytes Jump to start of PLT
+ .word 0,0,0 # 6 bytes filler
+ .long ? # 4 bytes offset into symbol table
+
+ Second the one for GOT offsets < 32768:
+
+PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
+ L 1,(1,12) # 4 bytes Load address from GOT to r1
+ BCR 15,1 # 2 bytes Jump to address
+ .word 0 # 2 bytes filler
+RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
+ L 1,14(1) # 4 bytes Load offset in symbol table in r1
+ BRC 15,-x # 4 bytes Jump to start of PLT
+ .word 0,0,0 # 6 bytes filler
+ .long ? # 4 bytes offset into symbol table
+
+Total = 32 bytes per PLT entry
+
+ The code for static build PLT entries looks like this:
+
+PLT1: BASR 1,0 # 2 bytes
+ L 1,22(1) # 4 bytes Load address of GOT entry
+ L 1,0(0,1) # 4 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
+ L 1,14(1) # 4 bytes Load offset in symbol table in r1
+ BRC 15,-x # 4 bytes Jump to start of PLT
+ .word 0 # 2 bytes filler
+ .long ? # 4 bytes address of GOT entry
+ .long ? # 4 bytes offset into symbol table */
+
+#define PLT_PIC_ENTRY_WORD0 0x0d105810
+#define PLT_PIC_ENTRY_WORD1 0x10165811
+#define PLT_PIC_ENTRY_WORD2 0xc00007f1
+#define PLT_PIC_ENTRY_WORD3 0x0d105810
+#define PLT_PIC_ENTRY_WORD4 0x100ea7f4
+
+#define PLT_PIC12_ENTRY_WORD0 0x5810c000
+#define PLT_PIC12_ENTRY_WORD1 0x07f10000
+#define PLT_PIC12_ENTRY_WORD2 0x00000000
+#define PLT_PIC12_ENTRY_WORD3 0x0d105810
+#define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
+
+#define PLT_PIC16_ENTRY_WORD0 0xa7180000
+#define PLT_PIC16_ENTRY_WORD1 0x5811c000
+#define PLT_PIC16_ENTRY_WORD2 0x07f10000
+#define PLT_PIC16_ENTRY_WORD3 0x0d105810
+#define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
+
+#define PLT_ENTRY_WORD0 0x0d105810
+#define PLT_ENTRY_WORD1 0x10165810
+#define PLT_ENTRY_WORD2 0x100007f1
+#define PLT_ENTRY_WORD3 0x0d105810
+#define PLT_ENTRY_WORD4 0x100ea7f4
+
+/* 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 for PIC code:
+
+PLT0:
+ ST 1,28(15) # R1 has offset into symbol table
+ L 1,4(12) # Get loader ino(object struct address)
+ ST 1,24(15) # Store address
+ L 1,8(12) # Entry address of loader in R1
+ BR 1 # Jump to loader
+
+ The first entry in the PLT for static code:
+
+PLT0:
+ ST 1,28(15) # R1 has offset into symbol table
+ BASR 1,0
+ L 1,18(0,1) # Get address of GOT
+ MVC 24(4,15),4(1) # Move loader ino to stack
+ L 1,8(1) # Get address of loader
+ BR 1 # Jump to loader
+ .word 0 # filler
+ .long got # address of GOT */
+
+#define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
+#define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
+#define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
+#define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
+#define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
+
+#define PLT_FIRST_ENTRY_WORD0 0x5010f01c
+#define PLT_FIRST_ENTRY_WORD1 0x0d105810
+#define PLT_FIRST_ENTRY_WORD2 0x1012D203
+#define PLT_FIRST_ENTRY_WORD3 0xf0181004
+#define PLT_FIRST_ENTRY_WORD4 0x58101008
+#define PLT_FIRST_ENTRY_WORD5 0x07f10000
+
+/* The s390 linker needs to keep track of the number of relocs that it
+ decides to copy in check_relocs for each symbol. This is so that
+ it can discard PC relative relocs if it doesn't need them when
+ linking with -Bsymbolic. We store the information in a field
+ extending the regular ELF linker hash table. */
+
+/* This structure keeps track of the number of PC relative relocs we
+ have copied for a given symbol. */
+
+struct elf_s390_pcrel_relocs_copied
+{
+ /* Next section. */
+ struct elf_s390_pcrel_relocs_copied *next;
+ /* A section in dynobj. */
+ asection *section;
+ /* Number of relocs copied in this section. */
+ bfd_size_type count;
+};
+
+/* s390 ELF linker hash entry. */
+
+struct elf_s390_link_hash_entry
+{
+ struct elf_link_hash_entry root;
+
+ /* Number of PC relative relocs copied for this symbol. */
+ struct elf_s390_pcrel_relocs_copied *pcrel_relocs_copied;
+};
+
+/* s390 ELF linker hash table. */
+
+struct elf_s390_link_hash_table
+{
+ struct elf_link_hash_table root;
+};
+
+/* Declare this now that the above structures are defined. */
+
+static boolean elf_s390_discard_copies
+ PARAMS ((struct elf_s390_link_hash_entry *, PTR));
+
+/* Traverse an s390 ELF linker hash table. */
+
+#define elf_s390_link_hash_traverse(table, func, info) \
+ (elf_link_hash_traverse \
+ (&(table)->root, \
+ (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
+ (info)))
+
+/* 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 *
+elf_s390_link_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ struct elf_s390_link_hash_entry *ret =
+ (struct elf_s390_link_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (ret == (struct elf_s390_link_hash_entry *) NULL)
+ ret = ((struct elf_s390_link_hash_entry *)
+ bfd_hash_allocate (table,
+ sizeof (struct elf_s390_link_hash_entry)));
+ if (ret == (struct elf_s390_link_hash_entry *) NULL)
+ return (struct bfd_hash_entry *) ret;
+
+ /* Call the allocation method of the superclass. */
+ ret = ((struct elf_s390_link_hash_entry *)
+ _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
+ table, string));
+ if (ret != (struct elf_s390_link_hash_entry *) NULL)
+ {
+ ret->pcrel_relocs_copied = NULL;
+ }
+
+ return (struct bfd_hash_entry *) ret;
+}
+
+/* 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;
+
+ ret = ((struct elf_s390_link_hash_table *)
+ bfd_alloc (abfd, sizeof (struct elf_s390_link_hash_table)));
+ if (ret == (struct elf_s390_link_hash_table *) NULL)
+ return NULL;
+
+ if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
+ elf_s390_link_hash_newfunc))
+ {
+ bfd_release (abfd, ret);
+ return NULL;
+ }
+
+ return &ret->root.root;
+}
+
+
+/* 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;
+{
+ bfd *dynobj;
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes;
+ bfd_signed_vma *local_got_refcounts;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+ asection *sgot;
+ asection *srelgot;
+ asection *sreloc;
+
+ if (info->relocateable)
+ return true;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ local_got_refcounts = elf_local_got_offsets (abfd);
+
+ sgot = NULL;
+ srelgot = NULL;
+ sreloc = NULL;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+
+ /* Some relocs require a global offset table. */
+ if (dynobj == NULL)
+ {
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT32:
+ case R_390_GOTOFF:
+ case R_390_GOTPC:
+ elf_hash_table (info)->dynobj = dynobj = abfd;
+ if (! _bfd_elf_create_got_section (dynobj, info))
+ return false;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT32:
+ /* This symbol requires a global offset table entry. */
+
+ if (sgot == NULL)
+ {
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ BFD_ASSERT (sgot != NULL);
+ }
+
+
+ if (srelgot == NULL
+ && (h != NULL || info->shared))
+ {
+ srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
+ if (srelgot == NULL)
+ {
+ srelgot = bfd_make_section (dynobj, ".rela.got");
+ if (srelgot == NULL
+ || ! bfd_set_section_flags (dynobj, srelgot,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | SEC_READONLY))
+ || ! bfd_set_section_alignment (dynobj, srelgot, 2))
+ return false;
+ }
+ }
+
+ if (h != NULL)
+ {
+ if (h->got.refcount == -1)
+ {
+ h->got.refcount = 1;
+
+ /* Make sure this symbol is output as a dynamic symbol. */
+ if (h->dynindx == -1)
+ {
+ if (! bfd_elf32_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ sgot->_raw_size += 4;
+ srelgot->_raw_size += sizeof (Elf32_External_Rela);
+ }
+ else
+ h->got.refcount += 1;
+ }
+ else
+ {
+ /* This is a global offset table entry for a local symbol. */
+ if (local_got_refcounts == NULL)
+ {
+ size_t size;
+
+ size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
+ local_got_refcounts = (bfd_signed_vma *)
+ bfd_alloc (abfd, size);
+ if (local_got_refcounts == NULL)
+ return false;
+ elf_local_got_refcounts (abfd) = local_got_refcounts;
+ memset (local_got_refcounts, -1, size);
+ }
+ if (local_got_refcounts[r_symndx] == -1)
+ {
+ local_got_refcounts[r_symndx] = 1;
+
+ sgot->_raw_size += 4;
+ if (info->shared)
+ {
+ /* If we are generating a shared object, we need to
+ output a R_390_RELATIVE reloc so that the dynamic
+ linker can adjust this GOT entry. */
+ srelgot->_raw_size += sizeof (Elf32_External_Rela);
+ }
+ }
+ else
+ local_got_refcounts[r_symndx] += 1;
+ }
+ break;
+
+ case R_390_PLT16DBL:
+ case R_390_PLT32:
+ /* This symbol requires a procedure linkage table entry. We
+ actually build the entry in adjust_dynamic_symbol,
+ because this might be a case of linking PIC code which is
+ never referenced by a dynamic object, in which case we
+ don't need to generate a procedure linkage table entry
+ after all. */
+
+ /* If this is a local symbol, we resolve it directly without
+ creating a procedure linkage table entry. */
+ if (h == NULL)
+ continue;
+
+ if (h->plt.refcount == -1)
+ {
+ h->plt.refcount = 1;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ }
+ else
+ h->plt.refcount += 1;
+ break;
+
+ case R_390_8:
+ case R_390_16:
+ case R_390_32:
+ case R_390_PC16:
+ case R_390_PC16DBL:
+ case R_390_PC32:
+ if (h != NULL)
+ h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
+
+ /* 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). We account for that
+ possibility below by storing information in the
+ pcrel_relocs_copied field of the hash table entry. */
+ if (info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 &&
+ ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL &&
+ ELF32_R_TYPE (rel->r_info) != R_390_PC32)
+ || (h != NULL
+ && (! info->symbolic
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ {
+ /* When creating a shared object, we must copy these
+ reloc types into the output file. We create a reloc
+ section in dynobj and make room for this reloc. */
+ if (sreloc == NULL)
+ {
+ const char *name;
+
+ 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;
+
+ BFD_ASSERT (strncmp (name, ".rela", 5) == 0
+ && strcmp (bfd_get_section_name (abfd, sec),
+ name + 5) == 0);
+
+ 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;
+ }
+ }
+
+ sreloc->_raw_size += sizeof (Elf32_External_Rela);
+
+ /* If we are linking with -Bsymbolic, and this is a
+ global symbol, we count the number of PC relative
+ relocations we have entered for this symbol, so that
+ we can discard them again if the symbol is later
+ defined by a regular object. Note that this function
+ is only called if we are using an elf_s390 linker
+ hash table, which means that h is really a pointer to
+ an elf_s390_link_hash_entry. */
+ if (h != NULL
+ && (ELF32_R_TYPE (rel->r_info) == R_390_PC16 ||
+ ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL ||
+ ELF32_R_TYPE (rel->r_info) == R_390_PC32))
+ {
+ struct elf_s390_link_hash_entry *eh;
+ struct elf_s390_pcrel_relocs_copied *p;
+
+ eh = (struct elf_s390_link_hash_entry *) h;
+
+ for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
+ if (p->section == sreloc)
+ break;
+
+ if (p == NULL)
+ {
+ p = ((struct elf_s390_pcrel_relocs_copied *)
+ bfd_alloc (dynobj, sizeof *p));
+ if (p == NULL)
+ return false;
+ p->next = eh->pcrel_relocs_copied;
+ eh->pcrel_relocs_copied = p;
+ p->section = sreloc;
+ p->count = 0;
+ }
+
+ ++p->count;
+ }
+ }
+
+ break;
+
+ /* This relocation describes the C++ object vtable hierarchy.
+ Reconstruct it for later use during GC. */
+ case R_390_GNU_VTINHERIT:
+ if (!_bfd_elf32_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_elf32_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 (ELF32_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
+ {
+ if (!(elf_bad_symtab (abfd)
+ && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
+ && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
+ && sym->st_shndx != SHN_COMMON))
+ {
+ 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 ATTRIBUTE_UNUSED;
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ asection *sec ATTRIBUTE_UNUSED;
+ const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
+{
+ 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;
+ bfd *dynobj;
+ asection *sgot;
+ asection *srelgot;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ local_got_refcounts = elf_local_got_refcounts (abfd);
+
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ return true;
+
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
+
+ relend = relocs + sec->reloc_count;
+ for (rel = relocs; rel < relend; rel++)
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_390_GOT12:
+ case R_390_GOT16:
+ case R_390_GOT32:
+ case R_390_GOTOFF:
+ case R_390_GOTPC:
+ r_symndx = ELF32_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;
+ if (h->got.refcount == 0)
+ {
+ sgot->_raw_size -= 4;
+ srelgot->_raw_size -= sizeof (Elf32_External_Rela);
+ }
+ }
+ }
+ else if (local_got_refcounts != NULL)
+ {
+ if (local_got_refcounts[r_symndx] > 0)
+ {
+ local_got_refcounts[r_symndx] -= 1;
+ if (local_got_refcounts[r_symndx] == 0)
+ {
+ sgot->_raw_size -= 4;
+ if (info->shared)
+ srelgot->_raw_size -= sizeof (Elf32_External_Rela);
+ }
+ }
+ }
+ break;
+
+ case R_390_PLT16DBL:
+ case R_390_PLT32:
+ r_symndx = ELF32_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;
+{
+ bfd *dynobj;
+ asection *s;
+ unsigned int power_of_two;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ /* Make sure we know what is going on here. */
+ BFD_ASSERT (dynobj != NULL
+ && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
+ || h->weakdef != NULL
+ || ((h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && (h->elf_link_hash_flags
+ & ELF_LINK_HASH_REF_REGULAR) != 0
+ && (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)));
+
+ /* 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 ((! info->shared
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
+ || (info->shared && h->plt.refcount <= 0))
+ {
+ /* 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;
+ }
+
+ /* Make sure this symbol is output as a dynamic symbol. */
+ if (h->dynindx == -1)
+ {
+ if (! bfd_elf32_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ s = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (s != NULL);
+
+ /* The first entry in .plt is reserved. */
+ if (s->_raw_size == 0)
+ s->_raw_size = PLT_FIRST_ENTRY_SIZE;
+
+ /* If this symbol is not defined in a regular file, and we are
+ not generating a shared library, then set the symbol to this
+ location in the .plt. This is required to make function
+ pointers compare as equal between the normal executable and
+ the shared library. */
+ if (! info->shared
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = s->_raw_size;
+ }
+
+ h->plt.offset = s->_raw_size;
+
+ /* 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. */
+ s = bfd_get_section_by_name (dynobj, ".got.plt");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size += GOT_ENTRY_SIZE;
+
+ /* We also need to make an entry in the .rela.plt section. */
+ s = bfd_get_section_by_name (dynobj, ".rela.plt");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size += sizeof (Elf32_External_Rela);
+
+ return true;
+ }
+
+ /* 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;
+
+ /* We must allocate the symbol in our .dynbss section, which will
+ become part of the .bss section of the executable. There will be
+ an entry for this symbol in the .dynsym section. The dynamic
+ object will contain position independent code, so all references
+ from the dynamic object to this symbol will go through the global
+ offset table. The dynamic linker will use the .dynsym entry to
+ determine the address it must put in the global offset table, so
+ both the dynamic object and the regular object will refer to the
+ same memory location for the variable. */
+
+ s = bfd_get_section_by_name (dynobj, ".dynbss");
+ BFD_ASSERT (s != NULL);
+
+ /* 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. 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;
+
+ srel = bfd_get_section_by_name (dynobj, ".rela.bss");
+ BFD_ASSERT (srel != NULL);
+ srel->_raw_size += sizeof (Elf32_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->_raw_size = BFD_ALIGN (s->_raw_size,
+ (bfd_size_type) (1 << power_of_two));
+ if (power_of_two > bfd_get_section_alignment (dynobj, s))
+ {
+ if (! bfd_set_section_alignment (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;
+}
+
+/* Set the sizes of the dynamic sections. */
+
+static boolean
+elf_s390_size_dynamic_sections (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ bfd *dynobj;
+ asection *s;
+ boolean reltext;
+ boolean relocs;
+ boolean plt;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ BFD_ASSERT (dynobj != NULL);
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* Set the contents of the .interp section to the interpreter. */
+ if (! info->shared)
+ {
+ s = bfd_get_section_by_name (dynobj, ".interp");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ }
+ }
+ else
+ {
+ /* We may have created entries in the .rela.got section.
+ However, if we are not creating the dynamic sections, we will
+ not actually use these entries. Reset the size of .rela.got,
+ which will cause it to get stripped from the output file
+ below. */
+ s = bfd_get_section_by_name (dynobj, ".rela.got");
+ if (s != NULL)
+ s->_raw_size = 0;
+ }
+
+ /* If this is a -Bsymbolic shared link, then we need to discard all
+ PC relative relocs against symbols defined in a regular object.
+ We allocated space for them in the check_relocs routine, but we
+ will not fill them in in the relocate_section routine. */
+ if (info->shared)
+ elf_s390_link_hash_traverse (elf_s390_hash_table (info),
+ elf_s390_discard_copies,
+ (PTR) info);
+
+ /* The check_relocs and adjust_dynamic_symbol entry points have
+ determined the sizes of the various dynamic sections. Allocate
+ memory for them. */
+ plt = false;
+ reltext = false;
+ relocs = false;
+ for (s = dynobj->sections; s != NULL; s = s->next)
+ {
+ const char *name;
+ boolean strip;
+
+ if ((s->flags & SEC_LINKER_CREATED) == 0)
+ continue;
+
+ /* It's OK to base decisions on the section name, because none
+ of the dynobj section names depend upon the input files. */
+ name = bfd_get_section_name (dynobj, s);
+
+ strip = false;
+
+ if (strcmp (name, ".plt") == 0)
+ {
+ if (s->_raw_size == 0)
+ {
+ /* Strip this section if we don't need it; see the
+ comment below. */
+ strip = true;
+ }
+ else
+ {
+ /* Remember whether there is a PLT. */
+ plt = true;
+ }
+ }
+ else if (strncmp (name, ".rela", 5) == 0)
+ {
+ 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
+ .rel.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. */
+ strip = true;
+ }
+ else
+ {
+ asection *target;
+
+ /* Remember whether there are any reloc sections other
+ than .rela.plt. */
+ if (strcmp (name, ".rela.plt") != 0)
+ {
+ const char *outname;
+
+ relocs = true;
+
+ /* If this relocation section applies to a read only
+ section, then we probably need a DT_TEXTREL
+ entry. The entries in the .rela.plt section
+ really apply to the .got section, which we
+ created ourselves and so know is not readonly. */
+ 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
+ && (target->flags & SEC_ALLOC) != 0)
+ reltext = true;
+ }
+
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ s->reloc_count = 0;
+ }
+ }
+ else if (strncmp (name, ".got", 4) != 0)
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (strip)
+ {
+ _bfd_strip_section_from_output (info, s);
+ continue;
+ }
+
+ /* Allocate memory for the section contents. */
+ s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
+ if (s->contents == NULL && s->_raw_size != 0)
+ return false;
+ }
+
+ if (elf_hash_table (info)->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. */
+ if (! info->shared)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
+ return false;
+ }
+
+ if (plt)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
+ return false;
+ }
+
+ if (relocs)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
+ sizeof (Elf32_External_Rela)))
+ return false;
+ }
+
+ if (reltext)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
+ return false;
+ info->flags |= DF_TEXTREL;
+ }
+ }
+
+ return true;
+}
+
+/* This function is called via elf_s390_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_s390_discard_copies (h, inf)
+ struct elf_s390_link_hash_entry *h;
+ PTR inf;
+{
+ struct elf_s390_pcrel_relocs_copied *s;
+ struct bfd_link_info *info = (struct bfd_link_info *) inf;
+
+ /* If a symbol has been forced local or we have found a regular
+ definition for the symbolic link case, then we won't be needing
+ any relocs. */
+ if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
+ && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
+ || info->symbolic))
+ {
+ for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
+ s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
+ }
+ 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;
+{
+ bfd *dynobj;
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes;
+ bfd_vma *local_got_offsets;
+ asection *sgot;
+ asection *splt;
+ asection *sreloc;
+ Elf_Internal_Rela *rel;
+ Elf_Internal_Rela *relend;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (input_bfd);
+ local_got_offsets = elf_local_got_offsets (input_bfd);
+
+ sgot = NULL;
+ splt = NULL;
+ sreloc = NULL;
+ if (dynobj != NULL)
+ {
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ }
+
+ rel = relocs;
+ relend = relocs + input_section->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ int r_type;
+ reloc_howto_type *howto;
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+ asection *sec;
+ bfd_vma relocation;
+ bfd_reloc_status_type r;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+ if (r_type == (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 = ELF32_R_SYM (rel->r_info);
+
+ if (info->relocateable)
+ {
+ /* This is a relocateable link. We don't have to change
+ anything, unless the reloc is against a section symbol,
+ in which case we have to adjust according to where the
+ section symbol winds up in the output section. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ sec = local_sections[r_symndx];
+ rel->r_addend += sec->output_offset + sym->st_value;
+ }
+ }
+
+ continue;
+ }
+
+ /* This is a final link. */
+ h = NULL;
+ sym = NULL;
+ sec = NULL;
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
+ relocation = (sec->output_section->vma
+ + sec->output_offset
+ + sym->st_value);
+ }
+ 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 (r_type == R_390_GOTPC
+ || ((r_type == R_390_PLT16DBL ||
+ r_type == R_390_PLT32)
+ && splt != NULL
+ && h->plt.offset != (bfd_vma) -1)
+ || ((r_type == R_390_GOT12 ||
+ r_type == R_390_GOT16 ||
+ r_type == R_390_GOT32)
+ && elf_hash_table (info)->dynamic_sections_created
+ && (! info->shared
+ || (! info->symbolic && h->dynindx != -1)
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ || (info->shared
+ && ((! info->symbolic && h->dynindx != -1)
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ && ( r_type == R_390_8 ||
+ r_type == R_390_16 ||
+ r_type == R_390_32 ||
+ r_type == R_390_PC16 ||
+ r_type == R_390_PC16DBL ||
+ r_type == R_390_PC32)
+ && ((input_section->flags & SEC_ALLOC) != 0
+ /* DWARF will emit R_386_32 relocations in its
+ sections against symbols defined externally
+ in shared libraries. We can't do anything
+ with them here. */
+ || ((input_section->flags & SEC_DEBUGGING) != 0
+ && (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_DYNAMIC) != 0))))
+ {
+ /* In these cases, we don't need the relocation
+ value. We check specially because in some
+ obscure cases sec->output_section will be NULL. */
+ relocation = 0;
+ }
+ else if (sec->output_section == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
+ bfd_get_filename (input_bfd), h->root.root.string,
+ bfd_get_section_name (input_bfd, input_section));
+ 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->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:
+ /* Relocation is to the entry for this symbol in the global
+ offset table. */
+ BFD_ASSERT (sgot != NULL);
+
+ if (h != NULL)
+ {
+ bfd_vma off;
+
+ off = h->got.offset;
+ BFD_ASSERT (off != (bfd_vma) -1);
+
+ if (! elf_hash_table (info)->dynamic_sections_created
+ || (info->shared
+ && (info->symbolic || h->dynindx == -1)
+ && (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_32 (output_bfd, relocation,
+ sgot->contents + off);
+ h->got.offset |= 1;
+ }
+ }
+ relocation = sgot->output_offset + off;
+ }
+ else
+ {
+ bfd_vma off;
+
+ BFD_ASSERT (local_got_offsets != NULL
+ && local_got_offsets[r_symndx] != (bfd_vma) -1);
+
+ off = local_got_offsets[r_symndx];
+
+ /* The offset must always be a multiple of 4. 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_32 (output_bfd, relocation, sgot->contents + off);
+
+ if (info->shared)
+ {
+ asection *srelgot;
+ Elf_Internal_Rela outrel;
+
+ srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
+ BFD_ASSERT (srelgot != NULL);
+
+ outrel.r_offset = (sgot->output_section->vma
+ + sgot->output_offset
+ + off);
+ outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
+ outrel.r_addend = relocation;
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel,
+ (((Elf32_External_Rela *)
+ srelgot->contents)
+ + srelgot->reloc_count));
+ ++srelgot->reloc_count;
+ }
+
+ local_got_offsets[r_symndx] |= 1;
+ }
+
+ relocation = sgot->output_offset + off;
+ }
+
+
+ break;
+
+ case R_390_GOTOFF:
+ /* Relocation is relative to the start of the global offset
+ table. */
+
+ if (sgot == NULL)
+ {
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ BFD_ASSERT (sgot != NULL);
+ }
+
+ /* 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 -= sgot->output_section->vma;
+
+ break;
+
+ case R_390_GOTPC:
+ /* Use global offset table as symbol value. */
+
+ if (sgot == NULL)
+ {
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ BFD_ASSERT (sgot != NULL);
+ }
+
+ relocation = sgot->output_section->vma;
+
+ break;
+
+ case R_390_PLT16DBL:
+ case R_390_PLT32:
+ /* 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 || 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 = (splt->output_section->vma
+ + splt->output_offset
+ + h->plt.offset);
+
+ break;
+
+ case R_390_8:
+ case R_390_16:
+ case R_390_32:
+ case R_390_PC16:
+ case R_390_PC16DBL:
+ case R_390_PC32:
+ if (info->shared
+ && (input_section->flags & SEC_ALLOC) != 0
+ && ((r_type != R_390_PC16 &&
+ r_type != R_390_PC16DBL &&
+ r_type != R_390_PC32)
+ || (h != NULL
+ && h->dynindx != -1
+ && (! info->symbolic
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ {
+ Elf_Internal_Rela outrel;
+ boolean skip, relocate;
+
+ /* When generating a shared object, these relocations
+ are copied into the output file to be resolved at run
+ time. */
+
+ if (sreloc == NULL)
+ {
+ const char *name;
+
+ name = (bfd_elf_string_from_elf_section
+ (input_bfd,
+ elf_elfheader (input_bfd)->e_shstrndx,
+ elf_section_data (input_section)->rel_hdr.sh_name));
+ if (name == NULL)
+ return false;
+
+ BFD_ASSERT (strncmp (name, ".rela", 5) == 0
+ && strcmp (bfd_get_section_name (input_bfd,
+ input_section),
+ name + 5) == 0);
+
+ sreloc = bfd_get_section_by_name (dynobj, name);
+ BFD_ASSERT (sreloc != NULL);
+ }
+
+ 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;
+ }
+ else if (r_type == R_390_PC16 ||
+ r_type == R_390_PC16DBL ||
+ r_type == R_390_PC32)
+ {
+ BFD_ASSERT (h != NULL && h->dynindx != -1);
+ relocate = false;
+ outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
+ else
+ {
+ /* h->dynindx may be -1 if this 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))
+ {
+ relocate = true;
+ outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
+ else
+ {
+ BFD_ASSERT (h->dynindx != -1);
+ relocate = false;
+ outrel.r_info = ELF32_R_INFO (h->dynindx, R_390_32);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
+ }
+
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel,
+ (((Elf32_External_Rela *)
+ sreloc->contents)
+ + sreloc->reloc_count));
+ ++sreloc->reloc_count;
+
+ /* 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;
+ }
+
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset,
+ relocation, rel->r_addend);
+
+ if (r != bfd_reloc_ok)
+ {
+ switch (r)
+ {
+ default:
+ case bfd_reloc_outofrange:
+ abort ();
+ case bfd_reloc_overflow:
+ {
+ const char *name;
+
+ if (h != NULL)
+ name = 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 (! ((*info->callbacks->reloc_overflow)
+ (info, name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset)))
+ return false;
+ }
+ break;
+ }
+ }
+ }
+
+ 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;
+{
+ bfd *dynobj;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ asection *splt;
+ asection *srela;
+ Elf_Internal_Rela rela;
+ bfd_vma relative_offset;
+ bfd_vma got_offset;
+ bfd_vma plt_index;
+ asection *sgot;
+
+ /* This symbol has an entry in the procedure linkage table. Set
+ it up. */
+
+ BFD_ASSERT (h->dynindx != -1);
+
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ sgot = bfd_get_section_by_name (dynobj, ".got.plt");
+ srela = bfd_get_section_by_name (dynobj, ".rela.plt");
+ BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
+
+ /* 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 4,
+ addr & GOT addr. */
+ got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
+
+ /* S390 uses halfwords for relative branch calc! */
+ relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
+ (PLT_ENTRY_SIZE * plt_index) + 18)/2);
+ /* If offset is > 32768, branch to a previous branch
+ 390 can only handle +-64 K jumps. */
+ if ( -32768 > (int)relative_offset )
+ relative_offset = -(((65536/PLT_ENTRY_SIZE-1)*PLT_ENTRY_SIZE)/2);
+
+ /* Fill in the entry in the procedure linkage table. */
+ if (!info->shared)
+ {
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD0,
+ splt->contents + h->plt.offset);
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD1,
+ splt->contents + h->plt.offset + 4);
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
+ splt->contents + h->plt.offset + 8);
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD3,
+ splt->contents + h->plt.offset + 12);
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD4,
+ splt->contents + h->plt.offset + 16);
+ bfd_put_32 (output_bfd, 0+(relative_offset << 16),
+ splt->contents + h->plt.offset + 20);
+ bfd_put_32 (output_bfd,
+ (sgot->output_section->vma +
+ sgot->output_offset +
+ got_offset),
+ splt->contents + h->plt.offset + 24);
+ }
+ else if (got_offset < 4096)
+ {
+ bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD0 + got_offset,
+ splt->contents + h->plt.offset);
+ bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD1,
+ splt->contents + h->plt.offset + 4);
+ bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD2,
+ splt->contents + h->plt.offset + 8);
+ bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD3,
+ splt->contents + h->plt.offset + 12);
+ bfd_put_32 (output_bfd, PLT_PIC12_ENTRY_WORD4,
+ splt->contents + h->plt.offset + 16);
+ bfd_put_32 (output_bfd, 0+(relative_offset << 16),
+ splt->contents + h->plt.offset + 20);
+ bfd_put_32 (output_bfd, 0,
+ splt->contents + h->plt.offset + 24);
+ }
+ else if (got_offset < 32768)
+ {
+ bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD0 + got_offset,
+ splt->contents + h->plt.offset);
+ bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD1,
+ splt->contents + h->plt.offset + 4);
+ bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD2,
+ splt->contents + h->plt.offset + 8);
+ bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD3,
+ splt->contents + h->plt.offset + 12);
+ bfd_put_32 (output_bfd, PLT_PIC16_ENTRY_WORD4,
+ splt->contents + h->plt.offset + 16);
+ bfd_put_32 (output_bfd, 0+(relative_offset << 16),
+ splt->contents + h->plt.offset + 20);
+ bfd_put_32 (output_bfd, 0,
+ splt->contents + h->plt.offset + 24);
+ }
+ else
+ {
+ bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0,
+ splt->contents + h->plt.offset);
+ bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1,
+ splt->contents + h->plt.offset + 4);
+ bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD2,
+ splt->contents + h->plt.offset + 8);
+ bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD3,
+ splt->contents + h->plt.offset + 12);
+ bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD4,
+ splt->contents + h->plt.offset + 16);
+ bfd_put_32 (output_bfd, 0+(relative_offset << 16),
+ splt->contents + h->plt.offset + 20);
+ bfd_put_32 (output_bfd, got_offset,
+ splt->contents + h->plt.offset + 24);
+ }
+ /* Insert offset into reloc. table here. */
+ bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
+ splt->contents + h->plt.offset + 28);
+ /* Fill in the entry in the .rela.plt section. */
+ rela.r_offset = (sgot->output_section->vma
+ + sgot->output_offset
+ + got_offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
+ rela.r_addend = 0;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela,
+ ((Elf32_External_Rela *) srela->contents
+ + plt_index ));
+
+ /* Fill in the entry in the global offset table.
+ Points to instruction after GOT offset. */
+ bfd_put_32 (output_bfd,
+ (splt->output_section->vma
+ + splt->output_offset
+ + h->plt.offset
+ + 12),
+ sgot->contents + got_offset);
+
+
+ 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. */
+ sym->st_shndx = SHN_UNDEF;
+ }
+ }
+
+ if (h->got.offset != (bfd_vma) -1)
+ {
+ asection *sgot;
+ asection *srela;
+ Elf_Internal_Rela rela;
+
+ /* This symbol has an entry in the global offset table. Set it
+ up. */
+
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ srela = bfd_get_section_by_name (dynobj, ".rela.got");
+ BFD_ASSERT (sgot != NULL && srela != NULL);
+
+ rela.r_offset = (sgot->output_section->vma
+ + sgot->output_offset
+ + (h->got.offset &~ 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 (! elf_hash_table (info)->dynamic_sections_created
+ || (info->shared
+ && (info->symbolic || h->dynindx == -1)
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
+ {
+ rela.r_info = ELF32_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_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
+ rela.r_addend = 0;
+ }
+
+ bfd_elf32_swap_reloca_out (output_bfd, &rela,
+ ((Elf32_External_Rela *) srela->contents
+ + srela->reloc_count));
+ ++srela->reloc_count;
+ }
+
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
+ {
+ asection *s;
+ Elf_Internal_Rela rela;
+
+ /* This symbols needs a copy reloc. Set it up. */
+
+ BFD_ASSERT (h->dynindx != -1
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak));
+
+
+ s = bfd_get_section_by_name (h->root.u.def.section->owner,
+ ".rela.bss");
+ BFD_ASSERT (s != NULL);
+
+ rela.r_offset = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
+ rela.r_addend = 0;
+ bfd_elf32_swap_reloca_out (output_bfd, &rela,
+ ((Elf32_External_Rela *) s->contents
+ + s->reloc_count));
+ ++s->reloc_count;
+ }
+
+ /* 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;
+}
+
+/* Finish up the dynamic sections. */
+
+static boolean
+elf_s390_finish_dynamic_sections (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ bfd *dynobj;
+ asection *sdyn;
+ asection *sgot;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ sgot = bfd_get_section_by_name (dynobj, ".got.plt");
+ BFD_ASSERT (sgot != NULL);
+ sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ asection *splt;
+ Elf32_External_Dyn *dyncon, *dynconend;
+
+ BFD_ASSERT (sdyn != NULL);
+
+ dyncon = (Elf32_External_Dyn *) sdyn->contents;
+ dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+ for (; dyncon < dynconend; dyncon++)
+ {
+ Elf_Internal_Dyn dyn;
+ const char *name;
+ asection *s;
+
+ bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
+ {
+ default:
+ break;
+
+ case DT_PLTGOT:
+ name = ".got";
+ goto get_vma;
+ case DT_JMPREL:
+ name = ".rela.plt";
+ get_vma:
+ s = bfd_get_section_by_name(output_bfd, name);
+ BFD_ASSERT (s != NULL);
+ dyn.d_un.d_ptr = s->vma;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+
+ case DT_PLTRELSZ:
+ s = bfd_get_section_by_name (output_bfd, ".rela.plt");
+ BFD_ASSERT (s != NULL);
+ if (s->_cooked_size != 0)
+ dyn.d_un.d_val = s->_cooked_size;
+ else
+ dyn.d_un.d_val = s->_raw_size;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+ }
+ }
+
+ /* Fill in the special first entry in the procedure linkage table. */
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ if (splt && splt->_raw_size > 0)
+ {
+ memset (splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
+ if (info->shared)
+ {
+ bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD0,
+ splt->contents );
+ bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD1,
+ splt->contents +4 );
+ bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD2,
+ splt->contents +8 );
+ bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD3,
+ splt->contents +12 );
+ bfd_put_32 (output_bfd, PLT_PIC_FIRST_ENTRY_WORD4,
+ splt->contents +16 );
+ }
+ else
+ {
+ bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD0,
+ splt->contents );
+ bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD1,
+ splt->contents +4 );
+ bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD2,
+ splt->contents +8 );
+ bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD3,
+ splt->contents +12 );
+ bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD4,
+ splt->contents +16 );
+ bfd_put_32 (output_bfd, PLT_FIRST_ENTRY_WORD5,
+ splt->contents +20 );
+ bfd_put_32 (output_bfd,
+ sgot->output_section->vma + sgot->output_offset,
+ splt->contents + 24);
+ }
+ elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
+ }
+
+ }
+
+ /* Set the first entry in the global offset table to the address of
+ the dynamic section. */
+ if (sgot->_raw_size > 0)
+ {
+ if (sdyn == NULL)
+ bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
+ else
+ bfd_put_32 (output_bfd,
+ sdyn->output_section->vma + sdyn->output_offset,
+ sgot->contents);
+
+ /* One entry for shared object struct ptr. */
+ bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
+ /* One entry for _dl_runtime_resolve. */
+ bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
+ }
+
+ elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+
+ return true;
+}
+
+static boolean
+elf_s390_object_p (abfd)
+ bfd *abfd;
+{
+ return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_esa);
+}
+
+#define TARGET_BIG_SYM bfd_elf32_s390_vec
+#define TARGET_BIG_NAME "elf32-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_can_gc_sections 1
+#define elf_backend_want_got_plt 1
+#define elf_backend_plt_readonly 1
+#define elf_backend_want_plt_sym 0
+#define elf_backend_got_header_size 12
+#define elf_backend_plt_header_size PLT_ENTRY_SIZE
+
+#define elf_info_to_howto elf_s390_info_to_howto
+
+#define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link
+#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
+#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
+#define bfd_elf32_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_create_dynamic_sections _bfd_elf_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_relocate_section elf_s390_relocate_section
+#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
+
+#define elf_backend_object_p elf_s390_object_p
+
+#include "elf32-target.h"