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-rw-r--r--bfd/elf32-i370.c1745
1 files changed, 1745 insertions, 0 deletions
diff --git a/bfd/elf32-i370.c b/bfd/elf32-i370.c
new file mode 100644
index 0000000..6dc993d
--- /dev/null
+++ b/bfd/elf32-i370.c
@@ -0,0 +1,1745 @@
+/* i370-specific support for 32-bit ELF
+ Copyright 1994, 95, 96, 97, 98, 2000 Free Software Foundation, Inc.
+ Written by Ian Lance Taylor, Cygnus Support.
+ Hacked by Linas Vepstas for i370 linas@linas.org
+
+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. */
+
+
+
+/* This file is based on a preliminary PowerPC ELF ABI.
+ But its been hacked on for the IBM 360/370 architectures.
+ Basically, the 31bit relocation works, and just about everything
+ else is a wild card. In particular, don't expect shared libs or
+ dynamic loading to work ... its never been tested ...
+*/
+
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "bfdlink.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/i370.h"
+
+#define USE_RELA /* we want RELA relocations, not REL */
+
+/* i370 relocations */
+/* Note that there is really just one relocation that we currently
+ * support (and only one that we seem to need, at the moment), and
+ * that is the 31-bit address relocation. Note that the 370/390
+ * only supports a 31-bit (2GB) address space.
+ */
+enum i370_reloc_type
+{
+ R_I370_NONE = 0,
+ R_I370_ADDR31 = 1,
+ R_I370_ADDR32 = 2,
+ R_I370_ADDR16 = 3,
+ R_I370_REL31 = 4,
+ R_I370_REL32 = 5,
+ R_I370_ADDR12 = 6,
+ R_I370_REL12 = 7,
+ R_I370_ADDR8 = 8,
+ R_I370_REL8 = 9,
+ R_I370_COPY = 10,
+ R_I370_RELATIVE = 11,
+
+ R_I370_max
+};
+
+
+static reloc_howto_type *i370_elf_howto_table[ (int)R_I370_max ];
+
+static reloc_howto_type i370_elf_howto_raw[] =
+{
+ /* This reloc does nothing. */
+ HOWTO (R_I370_NONE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_NONE", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A standard 31 bit relocation. */
+ HOWTO (R_I370_ADDR31, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 31, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_ADDR31", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0x7fffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A standard 32 bit relocation. */
+ HOWTO (R_I370_ADDR32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_ADDR32", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A standard 16 bit relocation. */
+ HOWTO (R_I370_ADDR16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_ADDR16", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 31-bit PC relative */
+ HOWTO (R_I370_REL31, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 31, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_REL31", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0x7fffffff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* 32-bit PC relative */
+ HOWTO (R_I370_REL32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_REL32", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* A standard 12 bit relocation. */
+ HOWTO (R_I370_ADDR12, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 12, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_ADDR12", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xfff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 12-bit PC relative */
+ HOWTO (R_I370_REL12, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 12, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_REL12", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xfff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* A standard 8 bit relocation. */
+ HOWTO (R_I370_ADDR8, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_ADDR8", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* 8-bit PC relative */
+ HOWTO (R_I370_REL8, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
+ true, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_REL8", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xff, /* dst_mask */
+ true), /* pcrel_offset */
+
+ /* This is used only by the dynamic linker. The symbol should exist
+ both in the object being run and in some shared library. The
+ dynamic linker copies the data addressed by the symbol from the
+ shared library into the object, because the object being
+ run has to have the data at some particular address. */
+ HOWTO (R_I370_COPY, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_COPY", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* Used only by the dynamic linker. When the object is run, this
+ longword is set to the load address of the object, plus the
+ addend. */
+ HOWTO (R_I370_RELATIVE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_I370_RELATIVE", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+};
+
+
+static void i370_elf_howto_init PARAMS ((void));
+static void i370_elf_info_to_howto PARAMS ((bfd *abfd, arelent *cache_ptr,
+ Elf32_Internal_Rela *dst));
+static boolean i370_elf_set_private_flags PARAMS ((bfd *, flagword));
+
+
+/* Initialize the i370_elf_howto_table, so that linear accesses can be done. */
+
+static void
+i370_elf_howto_init ()
+{
+ unsigned int i, type;
+
+ for (i = 0; i < sizeof (i370_elf_howto_raw) / sizeof (i370_elf_howto_raw[0]); i++)
+ {
+ type = i370_elf_howto_raw[i].type;
+ BFD_ASSERT (type < sizeof(i370_elf_howto_table) / sizeof(i370_elf_howto_table[0]));
+ i370_elf_howto_table[type] = &i370_elf_howto_raw[i];
+ }
+}
+
+
+static reloc_howto_type *
+i370_elf_reloc_type_lookup (abfd, code)
+ bfd *abfd;
+ bfd_reloc_code_real_type code;
+{
+ enum i370_reloc_type i370_reloc = R_I370_NONE;
+
+ if (!i370_elf_howto_table[ R_I370_ADDR31 ]) /* Initialize howto table if needed */
+ i370_elf_howto_init ();
+
+ switch ((int)code)
+ {
+ default:
+ return (reloc_howto_type *)NULL;
+
+ case BFD_RELOC_NONE: i370_reloc = R_I370_NONE; break;
+ case BFD_RELOC_32: i370_reloc = R_I370_ADDR31; break;
+ case BFD_RELOC_16: i370_reloc = R_I370_ADDR16; break;
+ case BFD_RELOC_32_PCREL: i370_reloc = R_I370_REL31; break;
+ case BFD_RELOC_CTOR: i370_reloc = R_I370_ADDR31; break;
+ case BFD_RELOC_I370_D12: i370_reloc = R_I370_ADDR12; break;
+ }
+
+ return i370_elf_howto_table[ (int)i370_reloc ];
+};
+
+static boolean i370_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
+static boolean i370_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
+
+static boolean i370_elf_relocate_section PARAMS ((bfd *,
+ struct bfd_link_info *info,
+ bfd *,
+ asection *,
+ bfd_byte *,
+ Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **));
+
+static boolean i370_elf_create_dynamic_sections PARAMS ((bfd *,
+ struct bfd_link_info *));
+
+static boolean i370_elf_section_from_shdr PARAMS ((bfd *,
+ Elf32_Internal_Shdr *,
+ char *));
+static boolean i370_elf_fake_sections PARAMS ((bfd *,
+ Elf32_Internal_Shdr *,
+ asection *));
+
+static elf_linker_section_t *i370_elf_create_linker_section
+ PARAMS ((bfd *abfd,
+ struct bfd_link_info *info,
+ enum elf_linker_section_enum));
+
+static boolean i370_elf_check_relocs PARAMS ((bfd *,
+ struct bfd_link_info *,
+ asection *,
+ const Elf_Internal_Rela *));
+
+static boolean i370_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *,
+ struct elf_link_hash_entry *));
+
+static boolean i370_elf_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR));
+
+static boolean i370_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
+
+static boolean i370_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
+
+/* The name of the dynamic interpreter. This is put in the .interp
+ section. */
+
+#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so"
+
+
+/* Set the howto pointer for an i370 ELF reloc. */
+
+static void
+i370_elf_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf32_Internal_Rela *dst;
+{
+ if (!i370_elf_howto_table[ R_I370_ADDR31 ]) /* Initialize howto table */
+ i370_elf_howto_init ();
+
+ BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_I370_max);
+ cache_ptr->howto = i370_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+}
+
+/* hack alert -- the following several routines look generic to me ...
+ * why are we bothering with them ???
+ */
+/* Function to set whether a module needs the -mrelocatable bit set. */
+static boolean
+i370_elf_set_private_flags (abfd, flags)
+ bfd *abfd;
+ flagword flags;
+{
+ BFD_ASSERT (!elf_flags_init (abfd)
+ || elf_elfheader (abfd)->e_flags == flags);
+
+ elf_elfheader (abfd)->e_flags = flags;
+ elf_flags_init (abfd) = true;
+ return true;
+}
+
+/* Copy backend specific data from one object module to another */
+static boolean
+i370_elf_copy_private_bfd_data (ibfd, obfd)
+ bfd *ibfd;
+ bfd *obfd;
+{
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return true;
+
+ BFD_ASSERT (!elf_flags_init (obfd)
+ || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
+
+ elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
+ elf_flags_init (obfd) = true;
+ return true;
+}
+
+/* Merge backend specific data from an object file to the output
+ object file when linking */
+static boolean
+i370_elf_merge_private_bfd_data (ibfd, obfd)
+ bfd *ibfd;
+ bfd *obfd;
+{
+ flagword old_flags;
+ flagword new_flags;
+
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return true;
+
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+ if (!elf_flags_init (obfd)) /* First call, no flags set */
+ {
+ elf_flags_init (obfd) = true;
+ elf_elfheader (obfd)->e_flags = new_flags;
+ }
+
+ else if (new_flags == old_flags) /* Compatible flags are ok */
+ ;
+
+ else /* Incompatible flags */
+ {
+ (*_bfd_error_handler)
+ ("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)",
+ bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
+
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ return true;
+}
+
+
+/* Handle an i370 specific section when reading an object file. This
+ is called when elfcode.h finds a section with an unknown type. */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_section_from_shdr (abfd, hdr, name)
+ bfd *abfd;
+ Elf32_Internal_Shdr *hdr;
+ char *name;
+{
+ asection *newsect;
+ flagword flags;
+
+ if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
+ return false;
+
+ newsect = hdr->bfd_section;
+ flags = bfd_get_section_flags (abfd, newsect);
+ if (hdr->sh_flags & SHF_EXCLUDE)
+ flags |= SEC_EXCLUDE;
+
+ if (hdr->sh_type == SHT_ORDERED)
+ flags |= SEC_SORT_ENTRIES;
+
+ bfd_set_section_flags (abfd, newsect, flags);
+ return true;
+}
+
+
+
+/* Set up any other section flags and such that may be necessary. */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+
+static boolean
+i370_elf_fake_sections (abfd, shdr, asect)
+ bfd *abfd;
+ Elf32_Internal_Shdr *shdr;
+ asection *asect;
+{
+ if ((asect->flags & SEC_EXCLUDE) != 0)
+ shdr->sh_flags |= SHF_EXCLUDE;
+
+ if ((asect->flags & SEC_SORT_ENTRIES) != 0)
+ shdr->sh_type = SHT_ORDERED;
+
+ return true;
+}
+
+
+/* Create a special linker section */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static elf_linker_section_t *
+i370_elf_create_linker_section (abfd, info, which)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ enum elf_linker_section_enum which;
+{
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ elf_linker_section_t *lsect;
+
+ /* Record the first bfd section that needs the special section */
+ if (!dynobj)
+ dynobj = elf_hash_table (info)->dynobj = abfd;
+
+ /* If this is the first time, create the section */
+ lsect = elf_linker_section (dynobj, which);
+ if (!lsect)
+ {
+ elf_linker_section_t defaults;
+ static elf_linker_section_t zero_section;
+
+ defaults = zero_section;
+ defaults.which = which;
+ defaults.hole_written_p = false;
+ defaults.alignment = 2;
+
+ /* Both of these sections are (technically) created by the user
+ putting data in them, so they shouldn't be marked
+ SEC_LINKER_CREATED.
+
+ The linker creates them so it has somewhere to attach their
+ respective symbols. In fact, if they were empty it would
+ be OK to leave the symbol set to 0 (or any random number), because
+ the appropriate register should never be used. */
+ defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY);
+
+ switch (which)
+ {
+ default:
+ (*_bfd_error_handler) ("%s: Unknown special linker type %d",
+ bfd_get_filename (abfd),
+ (int)which);
+
+ bfd_set_error (bfd_error_bad_value);
+ return (elf_linker_section_t *)0;
+
+ case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
+ defaults.name = ".sdata";
+ defaults.rel_name = ".rela.sdata";
+ defaults.bss_name = ".sbss";
+ defaults.sym_name = "_SDA_BASE_";
+ defaults.sym_offset = 32768;
+ break;
+
+ case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
+ defaults.name = ".sdata2";
+ defaults.rel_name = ".rela.sdata2";
+ defaults.bss_name = ".sbss2";
+ defaults.sym_name = "_SDA2_BASE_";
+ defaults.sym_offset = 32768;
+ defaults.flags |= SEC_READONLY;
+ break;
+ }
+
+ lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
+ }
+
+ return lsect;
+}
+
+
+/* We have to create .dynsbss and .rela.sbss here so that they get mapped
+ to output sections (just like _bfd_elf_create_dynamic_sections has
+ to create .dynbss and .rela.bss). */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_create_dynamic_sections (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ register asection *s;
+ flagword flags;
+
+ if (!_bfd_elf_create_dynamic_sections(abfd, info))
+ return false;
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+
+ s = bfd_make_section (abfd, ".dynsbss");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
+ return false;
+
+ if (! info->shared)
+ {
+ s = bfd_make_section (abfd, ".rela.sbss");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+ }
+
+ /* xxx beats me, seem to need a rela.text ... */
+ s = bfd_make_section (abfd, ".rela.text");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+ 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. */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_adjust_dynamic_symbol (info, h)
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+{
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ asection *s;
+ unsigned int power_of_two;
+ bfd_vma plt_offset;
+
+#ifdef DEBUG
+ fprintf (stderr, "i370_elf_adjust_dynamic_symbol called for %s\n",
+ h->root.root.string);
+#endif
+
+ /* 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)));
+
+
+ s = bfd_get_section_by_name (dynobj, ".rela.text");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size += sizeof (Elf32_External_Rela);
+
+ /* 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;
+
+ /* 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.
+
+ Of course, if the symbol is sufficiently small, we must instead
+ allocate it in .sbss. FIXME: It would be better to do this if and
+ only if there were actually SDAREL relocs for that symbol. */
+
+ if (h->size <= elf_gp_size (dynobj))
+ s = bfd_get_section_by_name (dynobj, ".dynsbss");
+ else
+ s = bfd_get_section_by_name (dynobj, ".dynbss");
+ BFD_ASSERT (s != NULL);
+
+ /* We must generate a R_I370_COPY reloc to tell the dynamic linker to
+ copy the initial value out of the dynamic object and into the
+ runtime process image. We need to remember the offset into the
+ .rela.bss section we are going to use. */
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+ {
+ asection *srel;
+
+ if (h->size <= elf_gp_size (dynobj))
+ srel = bfd_get_section_by_name (dynobj, ".rela.sbss");
+ else
+ 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 > 4)
+ power_of_two = 4;
+
+ /* 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;
+}
+
+
+/* Increment the index of a dynamic symbol by a given amount. Called
+ via elf_link_hash_traverse. */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_adjust_dynindx (h, cparg)
+ struct elf_link_hash_entry *h;
+ PTR cparg;
+{
+ int *cp = (int *) cparg;
+
+#ifdef DEBUG
+ fprintf (stderr,
+ "i370_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n",
+ h->dynindx, *cp);
+#endif
+
+ if (h->dynindx != -1)
+ h->dynindx += *cp;
+
+ return true;
+}
+
+
+/* Set the sizes of the dynamic sections. */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_size_dynamic_sections (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ bfd *dynobj;
+ asection *s;
+ boolean plt;
+ boolean relocs;
+ boolean reltext;
+
+#ifdef DEBUG
+ fprintf (stderr, "i370_elf_size_dynamic_sections called\n");
+#endif
+
+ 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, .rela.sdata, and
+ .rela.sdata2 sections. However, if we are not creating the
+ dynamic sections, we will not actually use these entries. Reset
+ the size of .rela.got, et al, which will cause it to get
+ stripped from the output file below. */
+ static char *rela_sections[] = { ".rela.got", ".rela.sdata",
+ ".rela.sdata2", ".rela.sbss",
+ (char *)0 };
+ char **p;
+
+ for (p = rela_sections; *p != (char *)0; p++)
+ {
+ s = bfd_get_section_by_name (dynobj, *p);
+ if (s != NULL)
+ s->_raw_size = 0;
+ }
+ }
+
+ /* The check_relocs and adjust_dynamic_symbol entry points have
+ determined the sizes of the various dynamic sections. Allocate
+ memory for them. */
+ plt = false;
+ relocs = false;
+ reltext = 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 mostly to handle .rela.bss and
+ .rela.plt. We must create both sections in
+ create_dynamic_sections, because they must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ strip = true;
+ }
+ else
+ {
+ asection *target;
+ const char *outname;
+
+ /* Remember whether there are any relocation sections. */
+ relocs = true;
+
+ /* If this relocation section applies to a read only
+ section, then we probably need a DT_TEXTREL entry. */
+ 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 (strcmp (name, ".got") != 0
+ && strcmp (name, ".sdata") != 0
+ && strcmp (name, ".sdata2") != 0)
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (strip)
+ {
+ asection **spp;
+
+ for (spp = &s->output_section->owner->sections;
+ *spp != s->output_section;
+ spp = &(*spp)->next)
+ ;
+ *spp = s->output_section->next;
+ --s->output_section->owner->section_count;
+
+ continue;
+ }
+ /* Allocate memory for the section contents. */
+ s->contents = (bfd_byte *) bfd_zalloc (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 i370_elf_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;
+ }
+ }
+
+ /* If we are generating a shared library, we generate a section
+ symbol for each output section. These are local symbols, which
+ means that they must come first in the dynamic symbol table.
+ That means we must increment the dynamic symbol index of every
+ other dynamic symbol.
+
+ FIXME: We assume that there will never be relocations to
+ locations in linker-created sections that do not have
+ externally-visible names. Instead, we should work out precisely
+ which sections relocations are targetted at. */
+ if (info->shared)
+ {
+ int c;
+
+ for (c = 0, s = output_bfd->sections; s != NULL; s = s->next)
+ {
+ if ((s->flags & SEC_LINKER_CREATED) != 0
+ || (s->flags & SEC_ALLOC) == 0)
+ {
+ elf_section_data (s)->dynindx = -1;
+ continue;
+ }
+
+ /* These symbols will have no names, so we don't need to
+ fiddle with dynstr_index. */
+
+ elf_section_data (s)->dynindx = c + 1;
+
+ c++;
+ }
+
+ elf_link_hash_traverse (elf_hash_table (info),
+ i370_elf_adjust_dynindx,
+ (PTR) &c);
+ elf_hash_table (info)->dynsymcount += c;
+ }
+
+ return true;
+}
+
+
+/* Look through the relocs for a section during the first phase, and
+ allocate space in the global offset table or procedure linkage
+ table. */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_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;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+ bfd_vma *local_got_offsets;
+ elf_linker_section_t *sdata;
+ elf_linker_section_t *sdata2;
+ asection *sreloc;
+ asection *sgot;
+ asection *srelgot = NULL;
+
+ if (info->relocateable)
+ return true;
+
+#ifdef DEBUG
+ fprintf (stderr, "i370_elf_check_relocs called for section %s in %s\n",
+ bfd_get_section_name (abfd, sec),
+ bfd_get_filename (abfd));
+#endif
+
+ dynobj = elf_hash_table (info)->dynobj;
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ local_got_offsets = elf_local_got_offsets (abfd);
+
+ sreloc = NULL;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+
+ if (info->shared)
+ {
+#ifdef DEBUG
+ fprintf (stderr,
+ "i370_elf_check_relocs needs to create relocation for %s\n",
+ (h && h->root.root.string)
+ ? h->root.root.string : "<unknown>");
+#endif
+ 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);
+
+ /* FIXME: We should here do what the m68k and i386
+ backends do: if the reloc is pc-relative, record it
+ in case it turns out that the reloc is unnecessary
+ because the symbol is forced local by versioning or
+ we are linking with -Bdynamic. Fortunately this
+ case is not frequent. */
+ }
+ }
+
+ return true;
+}
+
+
+/* Finish up the dynamic sections. */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing. Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_finish_dynamic_sections (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ asection *sdyn;
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ asection *sgot = bfd_get_section_by_name (dynobj, ".got");
+
+#ifdef DEBUG
+ fprintf (stderr, "i370_elf_finish_dynamic_sections called\n");
+#endif
+
+ sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ asection *splt;
+ Elf32_External_Dyn *dyncon, *dynconend;
+
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (splt != NULL && 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;
+ boolean size;
+
+ bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
+ {
+ case DT_PLTGOT: name = ".plt"; size = false; break;
+ case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
+ case DT_JMPREL: name = ".rela.plt"; size = false; break;
+ default: name = NULL; size = false; break;
+ }
+
+ if (name != NULL)
+ {
+ asection *s;
+
+ s = bfd_get_section_by_name (output_bfd, name);
+ if (s == NULL)
+ dyn.d_un.d_val = 0;
+ else
+ {
+ if (! size)
+ dyn.d_un.d_ptr = s->vma;
+ else
+ {
+ 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);
+ }
+ }
+ }
+
+ /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
+ easily find the address of the _GLOBAL_OFFSET_TABLE_. */
+/* XXX this is clearly very wrong for the 370 arch */
+ if (sgot)
+ {
+ unsigned char *contents = sgot->contents;
+ bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
+
+ if (sdyn == NULL)
+ bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4);
+ else
+ bfd_put_32 (output_bfd,
+ sdyn->output_section->vma + sdyn->output_offset,
+ contents+4);
+
+ elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+ }
+
+ if (info->shared)
+ {
+ asection *sdynsym;
+ asection *s;
+ Elf_Internal_Sym sym;
+ int maxdindx = 0;
+
+ /* Set up the section symbols for the output sections. */
+
+ sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
+ BFD_ASSERT (sdynsym != NULL);
+
+ sym.st_size = 0;
+ sym.st_name = 0;
+ sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+ sym.st_other = 0;
+
+ for (s = output_bfd->sections; s != NULL; s = s->next)
+ {
+ int indx, dindx;
+
+ sym.st_value = s->vma;
+
+ indx = elf_section_data (s)->this_idx;
+ dindx = elf_section_data (s)->dynindx;
+ if (dindx != -1)
+ {
+ BFD_ASSERT(indx > 0);
+ BFD_ASSERT(dindx > 0);
+
+ if (dindx > maxdindx)
+ maxdindx = dindx;
+
+ sym.st_shndx = indx;
+
+ bfd_elf32_swap_symbol_out (output_bfd, &sym,
+ (PTR) (((Elf32_External_Sym *)
+ sdynsym->contents)
+ + dindx));
+ }
+ }
+
+ /* Set the sh_info field of the output .dynsym section to the
+ index of the first global symbol. */
+ elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
+ maxdindx + 1;
+ }
+
+ return true;
+}
+
+
+/* The RELOCATE_SECTION function is called by the ELF backend linker
+ to handle the relocations for a section.
+
+ The relocs are always passed as Rela structures; if the section
+ actually uses Rel structures, the r_addend field will always be
+ zero.
+
+ This function is responsible for adjust the section contents as
+ necessary, and (if using Rela relocs and generating a
+ relocateable output file) adjusting the reloc addend as
+ necessary.
+
+ This function does not have to worry about setting the reloc
+ address or the reloc symbol index.
+
+ LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+ LOCAL_SECTIONS is an array giving the section in the input file
+ corresponding to the st_shndx field of each local symbol.
+
+ The global hash table entry for the global symbols can be found
+ via elf_sym_hashes (input_bfd).
+
+ When generating relocateable output, this function must handle
+ STB_LOCAL/STT_SECTION symbols specially. The output symbol is
+ going to be the section symbol corresponding to the output
+ section, which means that the addend must be adjusted
+ accordingly. */
+
+static boolean
+i370_elf_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;
+{
+ Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
+ bfd *dynobj = elf_hash_table (info)->dynobj;
+ Elf_Internal_Rela *rel = relocs;
+ Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
+ asection *sreloc = NULL;
+ bfd_vma *local_got_offsets;
+ boolean ret = true;
+
+#ifdef DEBUG
+ fprintf (stderr, "i370_elf_relocate_section called for %s section %s, %ld relocations%s\n",
+ bfd_get_filename (input_bfd),
+ bfd_section_name(input_bfd, input_section),
+ (long)input_section->reloc_count,
+ (info->relocateable) ? " (relocatable)" : "");
+#endif
+
+ if (!i370_elf_howto_table[ R_I370_ADDR31 ]) /* Initialize howto table if needed */
+ i370_elf_howto_init ();
+
+ local_got_offsets = elf_local_got_offsets (input_bfd);
+
+ for (; rel < relend; rel++)
+ {
+ enum i370_reloc_type r_type = (enum i370_reloc_type)ELF32_R_TYPE (rel->r_info);
+ bfd_vma offset = rel->r_offset;
+ bfd_vma addend = rel->r_addend;
+ bfd_reloc_status_type r = bfd_reloc_other;
+ Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0;
+ asection *sec = (asection *)0;
+ struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0;
+ const char *sym_name = (const char *)0;
+ reloc_howto_type *howto;
+ unsigned long r_symndx;
+ bfd_vma relocation;
+
+ /* Unknown relocation handling */
+ if ((unsigned)r_type >= (unsigned)R_I370_max
+ || !i370_elf_howto_table[(int)r_type])
+ {
+ (*_bfd_error_handler) ("%s: unknown relocation type %d",
+ bfd_get_filename (input_bfd),
+ (int)r_type);
+
+ bfd_set_error (bfd_error_bad_value);
+ ret = false;
+ continue;
+ }
+
+ howto = i370_elf_howto_table[(int)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 ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ sec = local_sections[r_symndx];
+ addend = rel->r_addend += sec->output_offset + sym->st_value;
+ }
+ }
+
+#ifdef DEBUG
+ fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
+ howto->name,
+ (int)r_type,
+ r_symndx,
+ (long)offset,
+ (long)addend);
+#endif
+ continue;
+ }
+
+ /* This is a final link. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
+ sym_name = "<local symbol>";
+
+ 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;
+ sym_name = h->root.root.string;
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ sec = h->root.u.def.section;
+ if (info->shared
+ && ((! info->symbolic && h->dynindx != -1)
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ && (input_section->flags & SEC_ALLOC) != 0
+ && (r_type == R_I370_ADDR31
+ || r_type == R_I370_COPY
+ || r_type == R_I370_ADDR16
+ || r_type == R_I370_RELATIVE))
+ {
+ /* 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
+ 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)
+ relocation = 0;
+ else
+ {
+ (*info->callbacks->undefined_symbol)(info,
+ h->root.root.string,
+ input_bfd,
+ input_section,
+ rel->r_offset);
+ ret = false;
+ continue;
+ }
+ }
+
+ switch ((int)r_type)
+ {
+ default:
+ (*_bfd_error_handler) ("%s: unknown relocation type %d for symbol %s",
+ bfd_get_filename (input_bfd),
+ (int)r_type, sym_name);
+
+ bfd_set_error (bfd_error_bad_value);
+ ret = false;
+ continue;
+
+ /* Relocations that may need to be propagated if this is a shared
+ object. */
+ case (int)R_I370_REL31:
+ /* If these relocations are not to a named symbol, they can be
+ handled right here, no need to bother the dynamic linker. */
+ if (h == NULL
+ || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+ break;
+ /* fall through */
+
+ /* Relocations that always need to be propagated if this is a shared
+ object. */
+ case (int)R_I370_NONE:
+ case (int)R_I370_ADDR31:
+ case (int)R_I370_ADDR16:
+ if (info->shared)
+ {
+ Elf_Internal_Rela outrel;
+ boolean skip;
+
+#ifdef DEBUG
+ fprintf (stderr,
+ "i370_elf_relocate_section needs to create relocation for %s\n",
+ (h && h->root.root.string) ? h->root.root.string : "<unknown>");
+#endif
+
+ /* 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);
+ /* h->dynindx may be -1 if this symbol was marked to
+ become local. */
+ else if (h != NULL
+ && ((! info->symbolic && h->dynindx != -1)
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ {
+ BFD_ASSERT (h->dynindx != -1);
+ outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+ outrel.r_addend = rel->r_addend;
+ }
+ else
+ {
+ if (r_type == R_I370_ADDR31)
+ {
+ outrel.r_info = ELF32_R_INFO (0, R_I370_RELATIVE);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
+ else
+ {
+ long indx;
+
+ if (h == NULL)
+ sec = local_sections[r_symndx];
+ else
+ {
+ BFD_ASSERT (h->root.type == bfd_link_hash_defined
+ || (h->root.type
+ == bfd_link_hash_defweak));
+ sec = h->root.u.def.section;
+ }
+ if (sec != NULL && bfd_is_abs_section (sec))
+ indx = 0;
+ else if (sec == NULL || sec->owner == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ else
+ {
+ asection *osec;
+
+ osec = sec->output_section;
+ indx = elf_section_data (osec)->dynindx;
+ BFD_ASSERT(indx > 0);
+#ifdef DEBUG
+ if (indx <= 0)
+ {
+ printf("indx=%d section=%s flags=%08x name=%s\n",
+ indx, osec->name, osec->flags,
+ h->root.root.string);
+ }
+#endif
+ }
+
+ outrel.r_info = ELF32_R_INFO (indx, r_type);
+ 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;
+
+ /* This reloc will be computed at runtime, so there's no
+ need to do anything now, unless this is a RELATIVE
+ reloc in an unallocated section. */
+ if (skip
+ || (input_section->flags & SEC_ALLOC) != 0
+ || ELF32_R_TYPE (outrel.r_info) != R_I370_RELATIVE)
+ continue;
+ }
+ break;
+
+ case (int)R_I370_COPY:
+ case (int)R_I370_RELATIVE:
+ (*_bfd_error_handler) ("%s: Relocation %s is not yet supported for symbol %s.",
+ bfd_get_filename (input_bfd),
+ i370_elf_howto_table[ (int)r_type ]->name,
+ sym_name);
+
+ bfd_set_error (bfd_error_invalid_operation);
+ ret = false;
+ continue;
+ }
+
+
+#ifdef DEBUG
+ fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
+ howto->name,
+ (int)r_type,
+ sym_name,
+ r_symndx,
+ (long)offset,
+ (long)addend);
+#endif
+
+ r = _bfd_final_link_relocate (howto,
+ input_bfd,
+ input_section,
+ contents,
+ offset,
+ relocation,
+ addend);
+
+ if (r != bfd_reloc_ok)
+ {
+ ret = false;
+ switch (r)
+ {
+ default:
+ break;
+
+ 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)
+ break;
+
+ if (*name == '\0')
+ name = bfd_section_name (input_bfd, sec);
+ }
+
+ (*info->callbacks->reloc_overflow)(info,
+ name,
+ howto->name,
+ (bfd_vma) 0,
+ input_bfd,
+ input_section,
+ offset);
+ }
+ break;
+
+ }
+ }
+ }
+
+
+#ifdef DEBUG
+ fprintf (stderr, "\n");
+#endif
+
+ return ret;
+}
+
+static void
+i370_elf_post_process_headers (abfd, link_info)
+ bfd * abfd;
+ struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
+{
+ Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
+
+ i_ehdrp = elf_elfheader (abfd);
+ i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
+}
+
+#define TARGET_BIG_SYM bfd_elf32_i370_vec
+#define TARGET_BIG_NAME "elf32-i370"
+#define ELF_ARCH bfd_arch_i370
+#define ELF_MACHINE_CODE EM_S370
+#ifdef EM_I370_OLD
+#define ELF_MACHINE_ALT1 EM_I370_OLD
+#endif
+#define ELF_MAXPAGESIZE 0x1000
+#define elf_info_to_howto i370_elf_info_to_howto
+
+
+
+#define elf_backend_plt_not_loaded 1
+#define elf_backend_got_symbol_offset 4
+
+#define bfd_elf32_bfd_reloc_type_lookup i370_elf_reloc_type_lookup
+#define bfd_elf32_bfd_set_private_flags i370_elf_set_private_flags
+#define bfd_elf32_bfd_copy_private_bfd_data i370_elf_copy_private_bfd_data
+#define bfd_elf32_bfd_merge_private_bfd_data i370_elf_merge_private_bfd_data
+#define elf_backend_relocate_section i370_elf_relocate_section
+
+/* dynamic loader support is mostly broken; just enough here to be able to
+ * link glibc's ld.so without errors.
+ */
+#define elf_backend_create_dynamic_sections i370_elf_create_dynamic_sections
+#define elf_backend_size_dynamic_sections i370_elf_size_dynamic_sections
+#define elf_backend_finish_dynamic_sections i370_elf_finish_dynamic_sections
+#define elf_backend_fake_sections i370_elf_fake_sections
+#define elf_backend_section_from_shdr i370_elf_section_from_shdr
+#define elf_backend_adjust_dynamic_symbol i370_elf_adjust_dynamic_symbol
+#define elf_backend_check_relocs i370_elf_check_relocs
+
+/*
+#define elf_backend_add_symbol_hook i370_elf_add_symbol_hook
+#define elf_backend_finish_dynamic_symbol i370_elf_finish_dynamic_symbol
+#define elf_backend_additional_program_headers i370_elf_additional_program_headers
+#define elf_backend_modify_segment_map i370_elf_modify_segment_map
+*/
+
+#define elf_backend_post_process_headers i370_elf_post_process_headers
+
+int i370_noop()
+{
+ return 1;
+}
+
+/* we need to define these at least as no-ops to link glibc ld.so */
+
+#define elf_backend_add_symbol_hook \
+ (boolean (*) PARAMS ((bfd *, struct bfd_link_info *, \
+ const char *, Elf_Internal_Sym *, \
+ asection *))) i370_noop
+#define elf_backend_finish_dynamic_symbol \
+ (boolean (*) PARAMS ((bfd *, struct bfd_link_info *, \
+ struct elf_link_hash_entry *, \
+ Elf_Internal_Sym *))) i370_noop
+#define elf_backend_additional_program_headers \
+ (int (*) PARAMS ((bfd *))) i370_noop
+#define elf_backend_modify_segment_map \
+ (boolean (*) PARAMS ((bfd *))) i370_noop
+
+#include "elf32-target.h"