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-rw-r--r--binutils-2.25/bfd/elf32-xstormy16.c1041
1 files changed, 1041 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf32-xstormy16.c b/binutils-2.25/bfd/elf32-xstormy16.c
new file mode 100644
index 00000000..851ebbc6
--- /dev/null
+++ b/binutils-2.25/bfd/elf32-xstormy16.c
@@ -0,0 +1,1041 @@
+/* Xstormy16-specific support for 32-bit ELF.
+ Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2010, 2011, 2012
+ Free Software Foundation, Inc.
+
+ This file is part of BFD, the Binary File Descriptor library.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/xstormy16.h"
+#include "libiberty.h"
+
+/* Handle the R_XSTORMY16_24 reloc, which has an odd bit arrangement. */
+
+static bfd_reloc_status_type
+xstormy16_elf_24_reloc (bfd *abfd,
+ arelent *reloc_entry,
+ asymbol *symbol,
+ void * data,
+ asection *input_section,
+ bfd *output_bfd,
+ char **error_message ATTRIBUTE_UNUSED)
+{
+ bfd_vma relocation, x;
+
+ if (output_bfd != NULL)
+ {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
+ if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
+ return bfd_reloc_outofrange;
+
+ if (bfd_is_com_section (symbol->section))
+ relocation = 0;
+ else
+ relocation = symbol->value;
+
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
+
+ x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
+ x &= 0x0000ff00;
+ x |= relocation & 0xff;
+ x |= (relocation << 8) & 0xffff0000;
+ bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address);
+
+ if (relocation & ~ (bfd_vma) 0xffffff)
+ return bfd_reloc_overflow;
+
+ return bfd_reloc_ok;
+}
+
+static reloc_howto_type xstormy16_elf_howto_table [] =
+{
+ /* This reloc does nothing. */
+ HOWTO (R_XSTORMY16_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_XSTORMY16_NONE", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 32 bit absolute relocation. */
+ HOWTO (R_XSTORMY16_32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_32", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 16 bit absolute relocation. */
+ HOWTO (R_XSTORMY16_16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* An 8 bit absolute relocation. */
+ HOWTO (R_XSTORMY16_8, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_unsigned, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_8", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 32 bit pc-relative relocation. */
+ HOWTO (R_XSTORMY16_PC32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_PC32", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 16 bit pc-relative relocation. */
+ HOWTO (R_XSTORMY16_PC16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_PC16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* An 8 bit pc-relative relocation. */
+ HOWTO (R_XSTORMY16_PC8, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_PC8", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 12-bit pc-relative relocation suitable for the branch instructions. */
+ HOWTO (R_XSTORMY16_REL_12, /* type */
+ 1, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 11, /* bitsize */
+ TRUE, /* pc_relative */
+ 1, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_REL_12", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0x0ffe, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 24-bit absolute relocation suitable for the jump instructions. */
+ HOWTO (R_XSTORMY16_24, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 24, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_unsigned, /* complain_on_overflow */
+ xstormy16_elf_24_reloc, /* special_function */
+ "R_XSTORMY16_24", /* name */
+ TRUE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff00ff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 16 bit absolute relocation to a function pointer. */
+ HOWTO (R_XSTORMY16_FPTR16, /* 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_XSTORMY16_FPTR16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* Low order 16 bit value of a high memory address. */
+ HOWTO (R_XSTORMY16_LO16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_LO16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* High order 16 bit value of a high memory address. */
+ HOWTO (R_XSTORMY16_HI16, /* type */
+ 16, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_HI16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 12 bit absolute relocation. */
+ HOWTO (R_XSTORMY16_12, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 12, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_XSTORMY16_12", /* name */
+ FALSE, /* partial_inplace */
+ 0x0000, /* src_mask */
+ 0x0fff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+};
+
+static reloc_howto_type xstormy16_elf_howto_table2 [] =
+{
+ /* GNU extension to record C++ vtable hierarchy */
+ HOWTO (R_XSTORMY16_GNU_VTINHERIT, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ NULL, /* special_function */
+ "R_XSTORMY16_GNU_VTINHERIT", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* GNU extension to record C++ vtable member usage */
+ HOWTO (R_XSTORMY16_GNU_VTENTRY, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ _bfd_elf_rel_vtable_reloc_fn, /* special_function */
+ "R_XSTORMY16_GNU_VTENTRY", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+};
+
+/* Map BFD reloc types to XSTORMY16 ELF reloc types. */
+
+typedef struct xstormy16_reloc_map
+{
+ bfd_reloc_code_real_type bfd_reloc_val;
+ unsigned int xstormy16_reloc_val;
+ reloc_howto_type * table;
+} reloc_map;
+
+static const reloc_map xstormy16_reloc_map [] =
+{
+ { BFD_RELOC_NONE, R_XSTORMY16_NONE, xstormy16_elf_howto_table },
+ { BFD_RELOC_32, R_XSTORMY16_32, xstormy16_elf_howto_table },
+ { BFD_RELOC_16, R_XSTORMY16_16, xstormy16_elf_howto_table },
+ { BFD_RELOC_8, R_XSTORMY16_8, xstormy16_elf_howto_table },
+ { BFD_RELOC_32_PCREL, R_XSTORMY16_PC32, xstormy16_elf_howto_table },
+ { BFD_RELOC_16_PCREL, R_XSTORMY16_PC16, xstormy16_elf_howto_table },
+ { BFD_RELOC_8_PCREL, R_XSTORMY16_PC8, xstormy16_elf_howto_table },
+ { BFD_RELOC_XSTORMY16_REL_12, R_XSTORMY16_REL_12, xstormy16_elf_howto_table },
+ { BFD_RELOC_XSTORMY16_24, R_XSTORMY16_24, xstormy16_elf_howto_table },
+ { BFD_RELOC_XSTORMY16_FPTR16, R_XSTORMY16_FPTR16, xstormy16_elf_howto_table },
+ { BFD_RELOC_LO16, R_XSTORMY16_LO16, xstormy16_elf_howto_table },
+ { BFD_RELOC_HI16, R_XSTORMY16_HI16, xstormy16_elf_howto_table },
+ { BFD_RELOC_XSTORMY16_12, R_XSTORMY16_12, xstormy16_elf_howto_table },
+ { BFD_RELOC_VTABLE_INHERIT, R_XSTORMY16_GNU_VTINHERIT, xstormy16_elf_howto_table2 },
+ { BFD_RELOC_VTABLE_ENTRY, R_XSTORMY16_GNU_VTENTRY, xstormy16_elf_howto_table2 },
+};
+
+static reloc_howto_type *
+xstormy16_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ unsigned int i;
+
+ for (i = ARRAY_SIZE (xstormy16_reloc_map); --i;)
+ {
+ const reloc_map * entry;
+
+ entry = xstormy16_reloc_map + i;
+
+ if (entry->bfd_reloc_val == code)
+ return entry->table + (entry->xstormy16_reloc_val
+ - entry->table[0].type);
+ }
+
+ return NULL;
+}
+
+static reloc_howto_type *
+xstormy16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0;
+ i < (sizeof (xstormy16_elf_howto_table)
+ / sizeof (xstormy16_elf_howto_table[0]));
+ i++)
+ if (xstormy16_elf_howto_table[i].name != NULL
+ && strcasecmp (xstormy16_elf_howto_table[i].name, r_name) == 0)
+ return &xstormy16_elf_howto_table[i];
+
+ for (i = 0;
+ i < (sizeof (xstormy16_elf_howto_table2)
+ / sizeof (xstormy16_elf_howto_table2[0]));
+ i++)
+ if (xstormy16_elf_howto_table2[i].name != NULL
+ && strcasecmp (xstormy16_elf_howto_table2[i].name, r_name) == 0)
+ return &xstormy16_elf_howto_table2[i];
+
+ return NULL;
+}
+
+/* Set the howto pointer for an XSTORMY16 ELF reloc. */
+
+static void
+xstormy16_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
+ arelent * cache_ptr,
+ Elf_Internal_Rela * dst)
+{
+ unsigned int r_type = ELF32_R_TYPE (dst->r_info);
+
+ if (r_type <= (unsigned int) R_XSTORMY16_12)
+ cache_ptr->howto = &xstormy16_elf_howto_table [r_type];
+ else if (r_type - R_XSTORMY16_GNU_VTINHERIT
+ <= (unsigned int) R_XSTORMY16_GNU_VTENTRY)
+ cache_ptr->howto
+ = &xstormy16_elf_howto_table2 [r_type - R_XSTORMY16_GNU_VTINHERIT];
+ else
+ abort ();
+}
+
+/* We support 16-bit pointers to code above 64k by generating a thunk
+ below 64k containing a JMPF instruction to the final address. We
+ cannot, unfortunately, minimize the number of thunks unless the
+ -relax switch is given, as otherwise we have no idea where the
+ sections will fall in the address space. */
+
+static bfd_boolean
+xstormy16_elf_check_relocs (bfd *abfd,
+ struct bfd_link_info *info,
+ asection *sec,
+ const Elf_Internal_Rela *relocs)
+{
+ const Elf_Internal_Rela *rel, *relend;
+ struct elf_link_hash_entry **sym_hashes;
+ Elf_Internal_Shdr *symtab_hdr;
+ bfd_vma *local_plt_offsets;
+ asection *splt;
+ bfd *dynobj;
+
+ if (info->relocatable)
+ return TRUE;
+
+ symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ local_plt_offsets = elf_local_got_offsets (abfd);
+ splt = NULL;
+ dynobj = elf_hash_table(info)->dynobj;
+
+ relend = relocs + sec->reloc_count;
+ for (rel = relocs; rel < relend; ++rel)
+ {
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+ bfd_vma *offset;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ /* PR15323, ref flags aren't set for references in the same
+ object. */
+ h->root.non_ir_ref = 1;
+ }
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ /* This relocation describes a 16-bit pointer to a function.
+ We may need to allocate a thunk in low memory; reserve memory
+ for it now. */
+ case R_XSTORMY16_FPTR16:
+ if (rel->r_addend != 0)
+ {
+ (*info->callbacks->warning)
+ (info, _("non-zero addend in @fptr reloc"), 0,
+ abfd, 0, 0);
+ }
+
+ if (dynobj == NULL)
+ elf_hash_table (info)->dynobj = dynobj = abfd;
+ if (splt == NULL)
+ {
+ splt = bfd_get_linker_section (dynobj, ".plt");
+ if (splt == NULL)
+ {
+ flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_READONLY | SEC_CODE);
+
+ splt = bfd_make_section_anyway_with_flags (dynobj, ".plt",
+ flags);
+ if (splt == NULL
+ || ! bfd_set_section_alignment (dynobj, splt, 1))
+ return FALSE;
+ }
+ }
+
+ if (h != NULL)
+ offset = &h->plt.offset;
+ else
+ {
+ if (local_plt_offsets == NULL)
+ {
+ size_t size;
+ unsigned int i;
+
+ size = symtab_hdr->sh_info * sizeof (bfd_vma);
+ local_plt_offsets = bfd_alloc (abfd, size);
+ if (local_plt_offsets == NULL)
+ return FALSE;
+ elf_local_got_offsets (abfd) = local_plt_offsets;
+
+ for (i = 0; i < symtab_hdr->sh_info; i++)
+ local_plt_offsets[i] = (bfd_vma) -1;
+ }
+ offset = &local_plt_offsets[r_symndx];
+ }
+
+ if (*offset == (bfd_vma) -1)
+ {
+ *offset = splt->size;
+ splt->size += 4;
+ }
+ break;
+
+ /* This relocation describes the C++ object vtable hierarchy.
+ Reconstruct it for later use during GC. */
+ case R_XSTORMY16_GNU_VTINHERIT:
+ if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+ return FALSE;
+ break;
+
+ /* This relocation describes which C++ vtable entries are actually
+ used. Record for later use during GC. */
+ case R_XSTORMY16_GNU_VTENTRY:
+ BFD_ASSERT (h != NULL);
+ if (h != NULL
+ && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+ return FALSE;
+ break;
+ }
+ }
+
+ return TRUE;
+}
+
+/* A subroutine of xstormy16_elf_relax_section. If the global symbol H
+ is within the low 64k, remove any entry for it in the plt. */
+
+struct relax_plt_data
+{
+ asection *splt;
+ bfd_boolean *again;
+};
+
+static bfd_boolean
+xstormy16_relax_plt_check (struct elf_link_hash_entry *h, void * xdata)
+{
+ struct relax_plt_data *data = (struct relax_plt_data *) xdata;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ bfd_vma address;
+
+ if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ address = 0;
+ else
+ address = (h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset
+ + h->root.u.def.value);
+
+ if (address <= 0xffff)
+ {
+ h->plt.offset = -1;
+ data->splt->size -= 4;
+ *data->again = TRUE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* A subroutine of xstormy16_elf_relax_section. If the global symbol H
+ previously had a plt entry, give it a new entry offset. */
+
+static bfd_boolean
+xstormy16_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata)
+{
+ bfd_vma *entry = (bfd_vma *) xdata;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ h->plt.offset = *entry;
+ *entry += 4;
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+xstormy16_elf_relax_section (bfd *dynobj,
+ asection *splt,
+ struct bfd_link_info *info,
+ bfd_boolean *again)
+{
+ struct relax_plt_data relax_plt_data;
+ bfd *ibfd;
+
+ /* Assume nothing changes. */
+ *again = FALSE;
+
+ if (info->relocatable)
+ return TRUE;
+
+ /* We only relax the .plt section at the moment. */
+ if (dynobj != elf_hash_table (info)->dynobj
+ || strcmp (splt->name, ".plt") != 0)
+ return TRUE;
+
+ /* Quick check for an empty plt. */
+ if (splt->size == 0)
+ return TRUE;
+
+ /* Map across all global symbols; see which ones happen to
+ fall in the low 64k. */
+ relax_plt_data.splt = splt;
+ relax_plt_data.again = again;
+ elf_link_hash_traverse (elf_hash_table (info), xstormy16_relax_plt_check,
+ &relax_plt_data);
+
+ /* Likewise for local symbols, though that's somewhat less convenient
+ as we have to walk the list of input bfds and swap in symbol data. */
+ for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
+ {
+ bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Sym *isymbuf = NULL;
+ unsigned int idx;
+
+ if (! local_plt_offsets)
+ continue;
+
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ if (symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ return FALSE;
+ }
+
+ for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
+ {
+ Elf_Internal_Sym *isym;
+ asection *tsec;
+ bfd_vma address;
+
+ if (local_plt_offsets[idx] == (bfd_vma) -1)
+ continue;
+
+ isym = &isymbuf[idx];
+ if (isym->st_shndx == SHN_UNDEF)
+ continue;
+ else if (isym->st_shndx == SHN_ABS)
+ tsec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ tsec = bfd_com_section_ptr;
+ else
+ tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
+
+ address = (tsec->output_section->vma
+ + tsec->output_offset
+ + isym->st_value);
+ if (address <= 0xffff)
+ {
+ local_plt_offsets[idx] = -1;
+ splt->size -= 4;
+ *again = TRUE;
+ }
+ }
+
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (! info->keep_memory)
+ free (isymbuf);
+ else
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
+ }
+ }
+
+ /* If we changed anything, walk the symbols again to reallocate
+ .plt entry addresses. */
+ if (*again && splt->size > 0)
+ {
+ bfd_vma entry = 0;
+
+ elf_link_hash_traverse (elf_hash_table (info),
+ xstormy16_relax_plt_realloc, &entry);
+
+ for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
+ {
+ bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
+ unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
+ unsigned int idx;
+
+ if (! local_plt_offsets)
+ continue;
+
+ for (idx = 0; idx < nlocals; ++idx)
+ if (local_plt_offsets[idx] != (bfd_vma) -1)
+ {
+ local_plt_offsets[idx] = entry;
+ entry += 4;
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+xstormy16_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *splt;
+
+ if (info->relocatable)
+ return TRUE;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ return TRUE;
+
+ splt = bfd_get_linker_section (dynobj, ".plt");
+ BFD_ASSERT (splt != NULL);
+
+ splt->contents = bfd_zalloc (dynobj, splt->size);
+ if (splt->contents == NULL)
+ return FALSE;
+
+ return TRUE;
+}
+
+/* Relocate an XSTORMY16 ELF section.
+
+ The RELOCATE_SECTION function is called by the new 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 adjusting the section contents as
+ necessary, and (if using Rela relocs and generating a relocatable
+ 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 relocatable 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 bfd_boolean
+xstormy16_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info * info,
+ bfd * input_bfd,
+ asection * input_section,
+ bfd_byte * contents,
+ Elf_Internal_Rela * relocs,
+ Elf_Internal_Sym * local_syms,
+ asection ** local_sections)
+{
+ Elf_Internal_Shdr * symtab_hdr;
+ struct elf_link_hash_entry ** sym_hashes;
+ Elf_Internal_Rela * rel;
+ Elf_Internal_Rela * relend;
+ bfd *dynobj;
+ asection *splt;
+
+ symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (input_bfd);
+ relend = relocs + input_section->reloc_count;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ splt = NULL;
+ if (dynobj != NULL)
+ splt = bfd_get_linker_section (dynobj, ".plt");
+
+ for (rel = relocs; rel < relend; rel ++)
+ {
+ reloc_howto_type * howto;
+ unsigned long r_symndx;
+ Elf_Internal_Sym * sym;
+ asection * sec;
+ struct elf_link_hash_entry * h;
+ bfd_vma relocation;
+ bfd_reloc_status_type r;
+ const char * name = NULL;
+ int r_type;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+
+ if ( r_type == R_XSTORMY16_GNU_VTINHERIT
+ || r_type == R_XSTORMY16_GNU_VTENTRY)
+ continue;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ howto = xstormy16_elf_howto_table + ELF32_R_TYPE (rel->r_info);
+ h = NULL;
+ sym = NULL;
+ sec = NULL;
+
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sec = local_sections [r_symndx];
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+ }
+ else
+ {
+ bfd_boolean unresolved_reloc, warned;
+
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h, sec, relocation,
+ unresolved_reloc, warned);
+ }
+
+ if (sec != NULL && discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, 1, relend, howto, 0, contents);
+
+ if (info->relocatable)
+ continue;
+
+ 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 || *name == '\0')
+ name = bfd_section_name (input_bfd, sec);
+ }
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_XSTORMY16_24:
+ {
+ bfd_vma reloc = relocation + rel->r_addend;
+ unsigned int x;
+
+ x = bfd_get_32 (input_bfd, contents + rel->r_offset);
+ x &= 0x0000ff00;
+ x |= reloc & 0xff;
+ x |= (reloc << 8) & 0xffff0000;
+ bfd_put_32 (input_bfd, x, contents + rel->r_offset);
+
+ if (reloc & ~0xffffff)
+ r = bfd_reloc_overflow;
+ else
+ r = bfd_reloc_ok;
+ break;
+ }
+
+ case R_XSTORMY16_FPTR16:
+ {
+ bfd_vma *plt_offset;
+
+ if (h != NULL)
+ plt_offset = &h->plt.offset;
+ else
+ plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
+
+ if (relocation <= 0xffff)
+ {
+ /* If the symbol is in range for a 16-bit address, we should
+ have deallocated the plt entry in relax_section. */
+ BFD_ASSERT (*plt_offset == (bfd_vma) -1);
+ }
+ else
+ {
+ /* If the symbol is out of range for a 16-bit address,
+ we must have allocated a plt entry. */
+ BFD_ASSERT (*plt_offset != (bfd_vma) -1);
+
+ /* If this is the first time we've processed this symbol,
+ fill in the plt entry with the correct symbol address. */
+ if ((*plt_offset & 1) == 0)
+ {
+ unsigned int x;
+
+ x = 0x00000200; /* jmpf */
+ x |= relocation & 0xff;
+ x |= (relocation << 8) & 0xffff0000;
+ bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
+ *plt_offset |= 1;
+ }
+
+ relocation = (splt->output_section->vma
+ + splt->output_offset
+ + (*plt_offset & -2));
+ }
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset,
+ relocation, 0);
+ break;
+ }
+
+ default:
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset,
+ relocation, rel->r_addend);
+ break;
+ }
+
+ if (r != bfd_reloc_ok)
+ {
+ const char * msg = NULL;
+
+ switch (r)
+ {
+ case bfd_reloc_overflow:
+ r = info->callbacks->reloc_overflow
+ (info, (h ? &h->root : NULL), name, howto->name,
+ (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
+ break;
+
+ case bfd_reloc_undefined:
+ r = info->callbacks->undefined_symbol
+ (info, name, input_bfd, input_section, rel->r_offset,
+ TRUE);
+ break;
+
+ case bfd_reloc_outofrange:
+ msg = _("internal error: out of range error");
+ break;
+
+ case bfd_reloc_notsupported:
+ msg = _("internal error: unsupported relocation error");
+ break;
+
+ case bfd_reloc_dangerous:
+ msg = _("internal error: dangerous relocation");
+ break;
+
+ default:
+ msg = _("internal error: unknown error");
+ break;
+ }
+
+ if (msg)
+ r = info->callbacks->warning
+ (info, msg, name, input_bfd, input_section, rel->r_offset);
+
+ if (! r)
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* This must exist if dynobj is ever set. */
+
+static bfd_boolean
+xstormy16_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *splt;
+
+ /* As an extra sanity check, verify that all plt entries have
+ been filled in. */
+
+ if ((dynobj = elf_hash_table (info)->dynobj) != NULL
+ && (splt = bfd_get_linker_section (dynobj, ".plt")) != NULL)
+ {
+ bfd_byte *contents = splt->contents;
+ unsigned int i, size = splt->size;
+
+ for (i = 0; i < size; i += 4)
+ {
+ unsigned int x = bfd_get_32 (dynobj, contents + i);
+
+ BFD_ASSERT (x != 0);
+ }
+ }
+
+ return TRUE;
+}
+
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+xstormy16_elf_gc_mark_hook (asection *sec,
+ struct bfd_link_info *info,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
+{
+ if (h != NULL)
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_XSTORMY16_GNU_VTINHERIT:
+ case R_XSTORMY16_GNU_VTENTRY:
+ return NULL;
+ }
+
+ return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
+}
+
+#define ELF_ARCH bfd_arch_xstormy16
+#define ELF_MACHINE_CODE EM_XSTORMY16
+#define ELF_MAXPAGESIZE 0x100
+
+#define TARGET_LITTLE_SYM bfd_elf32_xstormy16_vec
+#define TARGET_LITTLE_NAME "elf32-xstormy16"
+
+#define elf_info_to_howto_rel NULL
+#define elf_info_to_howto xstormy16_info_to_howto_rela
+#define elf_backend_relocate_section xstormy16_elf_relocate_section
+#define elf_backend_gc_mark_hook xstormy16_elf_gc_mark_hook
+#define elf_backend_check_relocs xstormy16_elf_check_relocs
+#define elf_backend_always_size_sections \
+ xstormy16_elf_always_size_sections
+#define elf_backend_omit_section_dynsym \
+ ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
+#define elf_backend_finish_dynamic_sections \
+ xstormy16_elf_finish_dynamic_sections
+
+#define elf_backend_can_gc_sections 1
+#define elf_backend_rela_normal 1
+
+#define bfd_elf32_bfd_reloc_type_lookup xstormy16_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup \
+ xstormy16_reloc_name_lookup
+#define bfd_elf32_bfd_relax_section xstormy16_elf_relax_section
+
+#include "elf32-target.h"