PRU BFD support

include/
	* elf/common.h: Add PRU ELF.
	* elf/pru.h: New file.
	* opcode/pru.h: New file.
	* dis-asm.h (print_insn_pru): Declare.
bfd/
	* archures.c: Add bfd_arch_pru.
	* Makefile.am: Add PRU target.
	* config.bfd: Ditto.
	* configure.ac: Ditto.
	* elf-bfd.h (enum elf_target_id): Add PRU_ELF_DATA.
	* targets.c: Add pru_elf32_vec.
	* reloc.c: Add PRU relocations.
	* cpu-pru.c: New file.
	* elf32-pru.c: New file.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* po/SRC-POTFILES.in: Regenerate.
	* bfd-in2.h: Regenerate
	* libbfd.h: Regenerate.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

1 files changed, 1469 insertions, 0 deletions

diff --git a/bfd/elf32-pru.c b/bfd/elf32-pru.c
new file mode 100644
index 0000000..b38951a
--- /dev/null
+++ b/bfd/elf32-pru.c
@@ -0,0 +1,1469 @@
+/* 32-bit ELF support for TI PRU.
+   Copyright (C) 2014-2016 Free Software Foundation, Inc.
+   Contributed by Dimitar Dimitrov <dimitar@dinux.eu>
+   Based on elf32-nios2.c
+
+   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.  */
+
+/* This file handles TI PRU ELF targets.  */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+#include "bfdlink.h"
+#include "genlink.h"
+#include "elf-bfd.h"
+#include "elf/pru.h"
+#include "opcode/pru.h"
+
+#define SWAP_VALS(A,B)		      \
+  do {				      \
+      (A) ^= (B);		      \
+      (B) ^= (A);		      \
+      (A) ^= (B);		      \
+  } while (0)
+
+/* Enable debugging printout at stdout with this variable.  */
+static bfd_boolean debug_relax = FALSE;
+
+/* Forward declarations.  */
+static bfd_reloc_status_type pru_elf32_pmem_relocate
+  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
+static bfd_reloc_status_type pru_elf32_s10_pcrel_relocate
+  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
+static bfd_reloc_status_type pru_elf32_u8_pcrel_relocate
+  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
+static bfd_reloc_status_type pru_elf32_ldi32_relocate
+  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
+static bfd_reloc_status_type bfd_elf_pru_diff_relocate
+  (bfd *, arelent *, asymbol *, void *,	asection *, bfd *, char **);
+
+/* Target vector.  */
+extern const bfd_target pru_elf32_vec;
+
+/* The relocation table used for SHT_REL sections.  */
+static reloc_howto_type elf_pru_howto_table_rel[] = {
+  /* No relocation.  */
+  HOWTO (R_PRU_NONE,		/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 3,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont,/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_PRU_NONE",		/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  HOWTO (R_PRU_16_PMEM,
+	 2,
+	 1,			/* short */
+	 32,
+	 FALSE,
+	 0,
+	 complain_overflow_dont,
+	 bfd_elf_generic_reloc,
+	 "R_PRU_16_PMEM",
+	 FALSE,
+	 0,			/* src_mask */
+	 0xffff,
+	 FALSE),
+
+  HOWTO (R_PRU_U16_PMEMIMM,
+	 2,
+	 2,
+	 32,
+	 FALSE,
+	 8,
+	 complain_overflow_unsigned,
+	 pru_elf32_pmem_relocate,
+	 "R_PRU_U16_PMEMIMM",
+	 FALSE,
+	 0,			/* src_mask */
+	 0x00ffff00,
+	 FALSE),
+
+  HOWTO (R_PRU_BFD_RELOC_16,
+	 0,
+	 1,			/* short */
+	 16,
+	 FALSE,
+	 0,
+	 complain_overflow_bitfield,
+	 bfd_elf_generic_reloc,
+	 "R_PRU_BFD_RELOC16",
+	 FALSE,
+	 0,			/* src_mask */
+	 0x0000ffff,
+	 FALSE),
+
+  /* 16-bit unsigned immediate relocation.  */
+  HOWTO (R_PRU_U16,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 8,			/* bitpos */
+	 complain_overflow_unsigned,	/* complain on overflow */
+	 bfd_elf_generic_reloc,	/* special function */
+	 "R_PRU_U16",		/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0x00ffff00,		/* dest_mask */
+	 FALSE),		/* pcrel_offset */
+
+  HOWTO (R_PRU_32_PMEM,
+	 2,
+	 2,			/* long */
+	 32,
+	 FALSE,
+	 0,
+	 complain_overflow_dont,
+	 pru_elf32_pmem_relocate,
+	 "R_PRU_32_PMEM",
+	 FALSE,
+	 0,			/* src_mask */
+	 0xffffffff,
+	 FALSE),
+
+  HOWTO (R_PRU_BFD_RELOC_32,
+	 0,
+	 2,			/* long */
+	 32,
+	 FALSE,
+	 0,
+	 complain_overflow_dont,
+	 bfd_elf_generic_reloc,
+	 "R_PRU_BFD_RELOC32",
+	 FALSE,
+	 0,			/* src_mask */
+	 0xffffffff,
+	 FALSE),
+
+  HOWTO (R_PRU_S10_PCREL,
+	 2,
+	 2,
+	 10,
+	 TRUE,
+	 0,
+	 complain_overflow_bitfield,
+	 pru_elf32_s10_pcrel_relocate,
+	 "R_PRU_S10_PCREL",
+	 FALSE,
+	 0,			/* src_mask */
+	 0x060000ff,
+	 TRUE),
+
+  HOWTO (R_PRU_U8_PCREL,
+	 2,
+	 2,
+	 8,
+	 TRUE,
+	 0,
+	 complain_overflow_unsigned,
+	 pru_elf32_u8_pcrel_relocate,
+	 "R_PRU_U8_PCREL",
+	 FALSE,
+	 0,			/* src_mask */
+	 0x000000ff,
+	 TRUE),
+
+  HOWTO (R_PRU_LDI32,
+	 0,			/* rightshift */
+	 4,			/* size (4 = 8bytes) */
+	 32,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_unsigned, /* complain on overflow */
+	 pru_elf32_ldi32_relocate, /* special function */
+	 "R_PRU_LDI32",		/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dest_mask */
+	 FALSE),		/* pcrel_offset */
+
+  /* GNU-specific relocations.  */
+  HOWTO (R_PRU_GNU_BFD_RELOC_8,
+	 0,
+	 0,			/* byte */
+	 8,
+	 FALSE,
+	 0,
+	 complain_overflow_bitfield,
+	 bfd_elf_generic_reloc,
+	 "R_PRU_BFD_RELOC8",
+	 FALSE,
+	 0,			/* src_mask */
+	 0x000000ff,
+	 FALSE),
+
+  HOWTO (R_PRU_GNU_DIFF8,	/* 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_pru_diff_relocate, /* special_function */
+	 "R_PRU_DIFF8",     	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xff,			/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  HOWTO (R_PRU_GNU_DIFF16,  	/* 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_pru_diff_relocate,/* special_function */
+	 "R_PRU_DIFF16",     	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffff,		/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  HOWTO (R_PRU_GNU_DIFF32,  	/* 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_pru_diff_relocate,/* special_function */
+	 "R_PRU_DIFF32",     	/* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,    	/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  HOWTO (R_PRU_GNU_DIFF16_PMEM,	/* 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_pru_diff_relocate,/* special_function */
+	 "R_PRU_DIFF16_PMEM",   /* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffff,		/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+  HOWTO (R_PRU_GNU_DIFF32_PMEM, /* 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_pru_diff_relocate,/* special_function */
+	 "R_PRU_DIFF32_PMEM",   /* name */
+	 FALSE,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+
+/* Add other relocations here.  */
+};
+
+static unsigned char elf_code_to_howto_index[R_PRU_ILLEGAL + 1];
+
+/* Return the howto for relocation RTYPE.  */
+static reloc_howto_type *
+lookup_howto (unsigned int rtype)
+{
+  static int initialized = 0;
+  int i;
+  int howto_tbl_size = (int) (sizeof (elf_pru_howto_table_rel)
+			      / sizeof (elf_pru_howto_table_rel[0]));
+
+  if (!initialized)
+    {
+      initialized = 1;
+      memset (elf_code_to_howto_index, 0xff,
+	      sizeof (elf_code_to_howto_index));
+      for (i = 0; i < howto_tbl_size; i++)
+	elf_code_to_howto_index[elf_pru_howto_table_rel[i].type] = i;
+    }
+
+  BFD_ASSERT (rtype <= R_PRU_ILLEGAL);
+  i = elf_code_to_howto_index[rtype];
+  if (i >= howto_tbl_size)
+    return 0;
+  return elf_pru_howto_table_rel + i;
+}
+
+/* Map for converting BFD reloc types to PRU reloc types.  */
+struct elf_reloc_map
+{
+  bfd_reloc_code_real_type bfd_val;
+  enum elf_pru_reloc_type elf_val;
+};
+
+static const struct elf_reloc_map pru_reloc_map[] = {
+  {BFD_RELOC_NONE, R_PRU_NONE},
+  {BFD_RELOC_PRU_16_PMEM, R_PRU_16_PMEM},
+  {BFD_RELOC_PRU_U16_PMEMIMM, R_PRU_U16_PMEMIMM},
+  {BFD_RELOC_16, R_PRU_BFD_RELOC_16},
+  {BFD_RELOC_PRU_U16, R_PRU_U16},
+  {BFD_RELOC_PRU_32_PMEM, R_PRU_32_PMEM},
+  {BFD_RELOC_32, R_PRU_BFD_RELOC_32},
+  {BFD_RELOC_PRU_S10_PCREL, R_PRU_S10_PCREL},
+  {BFD_RELOC_PRU_U8_PCREL, R_PRU_U8_PCREL},
+  {BFD_RELOC_PRU_LDI32, R_PRU_LDI32},
+
+  {BFD_RELOC_8, R_PRU_GNU_BFD_RELOC_8},
+  {BFD_RELOC_PRU_GNU_DIFF8, R_PRU_GNU_DIFF8},
+  {BFD_RELOC_PRU_GNU_DIFF16, R_PRU_GNU_DIFF16},
+  {BFD_RELOC_PRU_GNU_DIFF32, R_PRU_GNU_DIFF32},
+  {BFD_RELOC_PRU_GNU_DIFF16_PMEM, R_PRU_GNU_DIFF16_PMEM},
+  {BFD_RELOC_PRU_GNU_DIFF32_PMEM, R_PRU_GNU_DIFF32_PMEM},
+};
+
+
+/* Assorted hash table functions.  */
+
+/* Create an entry in a PRU ELF linker hash table.  */
+static struct bfd_hash_entry *
+link_hash_newfunc (struct bfd_hash_entry *entry,
+		   struct bfd_hash_table *table, const char *string)
+{
+  /* Allocate the structure if it has not already been allocated by a
+     subclass.  */
+  if (entry == NULL)
+    {
+      entry = bfd_hash_allocate (table,
+				 sizeof (struct elf_link_hash_entry));
+      if (entry == NULL)
+	return entry;
+    }
+
+  /* Call the allocation method of the superclass.  */
+  entry = _bfd_elf_link_hash_newfunc (entry, table, string);
+
+  return entry;
+}
+
+/* Implement bfd_elf32_bfd_reloc_type_lookup:
+   Given a BFD reloc type, return a howto structure.  */
+static reloc_howto_type *
+pru_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+				   bfd_reloc_code_real_type code)
+{
+  int i;
+  for (i = 0;
+       i < (int) (sizeof (pru_reloc_map) / sizeof (struct elf_reloc_map));
+       ++i)
+    if (pru_reloc_map[i].bfd_val == code)
+      return lookup_howto ((unsigned int) pru_reloc_map[i].elf_val);
+  return NULL;
+}
+
+/* Implement bfd_elf32_bfd_reloc_name_lookup:
+   Given a reloc name, return a howto structure.  */
+static reloc_howto_type *
+pru_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+				   const char *r_name)
+{
+  unsigned int i;
+  for (i = 0;
+       i < (sizeof (elf_pru_howto_table_rel)
+	    / sizeof (elf_pru_howto_table_rel[0]));
+       i++)
+    if (elf_pru_howto_table_rel[i].name
+	&& strcasecmp (elf_pru_howto_table_rel[i].name, r_name) == 0)
+      return &elf_pru_howto_table_rel[i];
+
+  return NULL;
+}
+
+/* Implement elf_info_to_howto:
+   Given a ELF32 relocation, fill in a arelent structure.  */
+static void
+pru_elf32_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
+			 Elf_Internal_Rela *dst)
+{
+  unsigned int r_type;
+
+  r_type = ELF32_R_TYPE (dst->r_info);
+  BFD_ASSERT (r_type < R_PRU_ILLEGAL);
+  cache_ptr->howto = lookup_howto (r_type);
+}
+
+/* Do the relocations that require special handling.  */
+/* Produce a word address for program memory.  Linker scripts will put .text
+   at a high offset in order to differentiate it from .data.  So here we also
+   mask the high bits of PMEM address.
+
+   But why 1MB when internal Program Memory much smaller? We want to catch
+   unintended overflows.
+
+   Why not use (1<<31) as an offset and a mask? Sitara DDRAM usually resides
+   there, and users might want to put some shared carveout memory region in
+   their linker scripts.  So 0x80000000 might be a valid .data address.
+
+   Note that we still keep and pass down the original howto.  This way we
+   can reuse this function for several different relocations.  */
+static bfd_reloc_status_type
+pru_elf32_do_pmem_relocate (bfd *abfd, reloc_howto_type *howto,
+			    asection *input_section,
+			    bfd_byte *data, bfd_vma offset,
+			    bfd_vma symbol_value, bfd_vma addend)
+{
+  symbol_value = symbol_value + addend;
+  addend = 0;
+  symbol_value &= 0x3fffff;
+  return _bfd_final_link_relocate (howto, abfd, input_section,
+				   data, offset, symbol_value, addend);
+}
+
+/* Direct copy of _bfd_final_link_relocate, but with special
+   "fill-in".  This copy-paste mumbo jumbo is only needed because BFD
+   cannot deal correctly with non-contiguous bit fields.  */
+static bfd_reloc_status_type
+pru_elf32_do_s10_pcrel_relocate (bfd *input_bfd, reloc_howto_type *howto,
+				 asection *input_section,
+				 bfd_byte *contents, bfd_vma address,
+				 bfd_vma relocation, bfd_vma addend)
+{
+  bfd_byte *location;
+  bfd_vma x = 0;
+  bfd_vma qboff;
+  bfd_reloc_status_type flag = bfd_reloc_ok;
+
+  /* Sanity check the address.  */
+  if (address > bfd_get_section_limit (input_bfd, input_section))
+    return bfd_reloc_outofrange;
+
+  BFD_ASSERT (howto->pc_relative);
+  BFD_ASSERT (howto->pcrel_offset);
+
+  relocation = relocation + addend - (input_section->output_section->vma
+		+ input_section->output_offset) - address;
+
+  location = contents + address;
+
+  /* Get the value we are going to relocate.  */
+  BFD_ASSERT (bfd_get_reloc_size (howto) == 4);
+  x = bfd_get_32 (input_bfd, location);
+
+  qboff = GET_BROFF_SIGNED (x) << howto->rightshift;
+  relocation += qboff;
+
+  BFD_ASSERT (howto->complain_on_overflow == complain_overflow_bitfield);
+
+  if (relocation > 2047 && relocation < (bfd_vma)-2048l)
+    flag = bfd_reloc_overflow;
+
+  /* Check that target address is word-aligned.  */
+  if (relocation & ((1 << howto->rightshift) - 1))
+    flag = bfd_reloc_outofrange;
+
+  relocation >>= (bfd_vma) howto->rightshift;
+
+  /* Fill-in the RELOCATION to the right bits of X.  */
+  SET_BROFF_URAW (x, relocation);
+
+  bfd_put_32 (input_bfd, x, location);
+
+  return flag;
+}
+
+static bfd_reloc_status_type
+pru_elf32_do_u8_pcrel_relocate (bfd *abfd, reloc_howto_type *howto,
+				asection *input_section,
+				bfd_byte *data, bfd_vma offset,
+				bfd_vma symbol_value, bfd_vma addend)
+{
+  bfd_vma relocation;
+
+  BFD_ASSERT (howto->pc_relative);
+  BFD_ASSERT (howto->pcrel_offset);
+
+  relocation = symbol_value + addend - (input_section->output_section->vma
+		+ input_section->output_offset) - offset;
+  relocation >>= howto->rightshift;
+
+  /* 0 and 1 are invalid target labels for LOOP.  We cannot
+     encode this info in HOWTO, so catch such cases here.  */
+  if (relocation < 2)
+      return bfd_reloc_outofrange;
+
+  return _bfd_final_link_relocate (howto, abfd, input_section,
+				   data, offset, symbol_value, addend);
+}
+
+/* Idea and code taken from elf32-d30v.  */
+static bfd_reloc_status_type
+pru_elf32_do_ldi32_relocate (bfd *abfd, reloc_howto_type *howto,
+			     asection *input_section,
+			     bfd_byte *data, bfd_vma offset,
+			     bfd_vma symbol_value, bfd_vma addend)
+{
+  bfd_signed_vma relocation;
+  bfd_size_type octets = offset * bfd_octets_per_byte (abfd);
+  bfd_byte *location;
+  unsigned long in1, in2, num;
+
+  /* A hacked-up version of _bfd_final_link_relocate() follows.  */
+
+  /* Sanity check the address.  */
+  if (octets + bfd_get_reloc_size (howto)
+      > bfd_get_section_limit_octets (abfd, input_section))
+    return bfd_reloc_outofrange;
+
+  /* This function assumes that we are dealing with a basic relocation
+     against a symbol.  We want to compute the value of the symbol to
+     relocate to.  This is just VALUE, the value of the symbol, plus
+     ADDEND, any addend associated with the reloc.  */
+  relocation = symbol_value + addend;
+
+  BFD_ASSERT (!howto->pc_relative);
+
+  /* A hacked-up version of _bfd_relocate_contents() follows.  */
+  location = data + offset * bfd_octets_per_byte (abfd);
+
+  BFD_ASSERT (!howto->pc_relative);
+
+  in1 = bfd_get_32 (abfd, location);
+  in2 = bfd_get_32 (abfd, location + 4);
+
+  /* Extract the addend - should be zero per my understanding.  */
+  num = GET_INSN_FIELD (IMM16, in1) | (GET_INSN_FIELD (IMM16, in2) << 16);
+  BFD_ASSERT (!num);
+
+  relocation += num;
+
+  SET_INSN_FIELD (IMM16, in1, relocation & 0xffff);
+  SET_INSN_FIELD (IMM16, in2, relocation >> 16);
+
+  bfd_put_32 (abfd, in1, location);
+  bfd_put_32 (abfd, in2, location + 4);
+
+  return bfd_reloc_ok;
+}
+
+/* HOWTO handlers for relocations that require special handling.  */
+
+static bfd_reloc_status_type
+pru_elf32_pmem_relocate (bfd *abfd, arelent *reloc_entry,
+			 asymbol *symbol, void *data,
+			 asection *input_section, bfd *output_bfd,
+			 char **error_message)
+{
+  /* If this is a relocatable link (output_bfd test tells us), just
+     call the generic function.  Any adjustment will be done at final
+     link time.  */
+  if (output_bfd != NULL)
+    return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+				  input_section, output_bfd, error_message);
+
+  return pru_elf32_do_pmem_relocate (abfd, reloc_entry->howto,
+				     input_section,
+				     data, reloc_entry->address,
+				     (symbol->value
+				      + symbol->section->output_section->vma
+				      + symbol->section->output_offset),
+				     reloc_entry->addend);
+}
+
+static bfd_reloc_status_type
+pru_elf32_s10_pcrel_relocate (bfd *abfd, arelent *reloc_entry,
+				 asymbol *symbol, void *data,
+				 asection *input_section, bfd *output_bfd,
+				 char **error_message)
+{
+  /* If this is a relocatable link (output_bfd test tells us), just
+     call the generic function.  Any adjustment will be done at final
+     link time.  */
+  if (output_bfd != NULL)
+    return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+				  input_section, output_bfd, error_message);
+
+  return pru_elf32_do_s10_pcrel_relocate (abfd, reloc_entry->howto,
+					  input_section, data,
+					  reloc_entry->address,
+					  (symbol->value
+					   + symbol->section->output_section->vma
+					   + symbol->section->output_offset),
+					  reloc_entry->addend);
+}
+
+static bfd_reloc_status_type
+pru_elf32_u8_pcrel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+			     void *data, asection *input_section,
+			     bfd *output_bfd,
+			     char **error_message)
+{
+  /* If this is a relocatable link (output_bfd test tells us), just
+     call the generic function.  Any adjustment will be done at final
+     link time.  */
+  if (output_bfd != NULL)
+    return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+				  input_section, output_bfd, error_message);
+
+  return pru_elf32_do_u8_pcrel_relocate (abfd, reloc_entry->howto,
+					 input_section,
+					 data, reloc_entry->address,
+					 (symbol->value
+					  + symbol->section->output_section->vma
+					  + symbol->section->output_offset),
+					 reloc_entry->addend);
+}
+
+static bfd_reloc_status_type
+pru_elf32_ldi32_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
+			  void *data, asection *input_section,
+			  bfd *output_bfd,
+			  char **error_message)
+{
+  /* If this is a relocatable link (output_bfd test tells us), just
+     call the generic function.  Any adjustment will be done at final
+     link time.  */
+  if (output_bfd != NULL)
+    return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+				  input_section, output_bfd, error_message);
+
+  return pru_elf32_do_ldi32_relocate (abfd, reloc_entry->howto,
+				      input_section,
+				      data, reloc_entry->address,
+				      (symbol->value
+				       + symbol->section->output_section->vma
+				       + symbol->section->output_offset),
+				      reloc_entry->addend);
+}
+
+
+/* Implement elf_backend_relocate_section.  */
+static bfd_boolean
+pru_elf32_relocate_section (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;
+  struct elf_link_hash_entry **sym_hashes;
+  Elf_Internal_Rela *rel;
+  Elf_Internal_Rela *relend;
+
+  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+  sym_hashes = elf_sym_hashes (input_bfd);
+  relend = relocs + input_section->reloc_count;
+
+  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 = bfd_reloc_ok;
+      const char *name = NULL;
+      const char* msg = (const char*) NULL;
+      bfd_boolean unresolved_reloc;
+
+      r_symndx = ELF32_R_SYM (rel->r_info);
+
+      howto = lookup_howto ((unsigned) 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 warned, ignored;
+
+	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+				   r_symndx, symtab_hdr, sym_hashes,
+				   h, sec, relocation,
+				   unresolved_reloc, warned, ignored);
+	}
+
+      if (sec && discarded_section (sec))
+	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+					 rel, 1, relend, howto, 0, contents);
+
+      /* Nothing more to do unless this is a final link.  */
+      if (bfd_link_relocatable (info))
+	continue;
+
+      if (howto)
+	{
+	  switch (howto->type)
+	    {
+	    case R_PRU_NONE:
+	      /* We don't need to find a value for this symbol.  It's just a
+		 marker.  */
+	      r = bfd_reloc_ok;
+	      break;
+
+	    case R_PRU_U16_PMEMIMM:
+	    case R_PRU_32_PMEM:
+	    case R_PRU_16_PMEM:
+	      r = pru_elf32_do_pmem_relocate (input_bfd, howto,
+						input_section,
+						contents, rel->r_offset,
+						relocation, rel->r_addend);
+	      break;
+	    case R_PRU_S10_PCREL:
+	      r = pru_elf32_do_s10_pcrel_relocate (input_bfd, howto,
+						      input_section,
+						      contents,
+						      rel->r_offset,
+						      relocation,
+						      rel->r_addend);
+	      break;
+	    case R_PRU_U8_PCREL:
+	      r = pru_elf32_do_u8_pcrel_relocate (input_bfd, howto,
+						      input_section,
+						      contents,
+						      rel->r_offset,
+						      relocation,
+						      rel->r_addend);
+	      break;
+	    case R_PRU_LDI32:
+	      r = pru_elf32_do_ldi32_relocate (input_bfd, howto,
+					       input_section,
+					       contents,
+					       rel->r_offset,
+					       relocation,
+					       rel->r_addend);
+	      break;
+	    case R_PRU_GNU_DIFF8:
+	    case R_PRU_GNU_DIFF16:
+	    case R_PRU_GNU_DIFF32:
+	    case R_PRU_GNU_DIFF16_PMEM:
+	    case R_PRU_GNU_DIFF32_PMEM:
+	      /* Nothing to do here, as contents already contain the
+		 diff value.  */
+	      r = bfd_reloc_ok;
+	      break;
+
+	    default:
+	      r = _bfd_final_link_relocate (howto, input_bfd,
+					    input_section, contents,
+					    rel->r_offset, relocation,
+					    rel->r_addend);
+	      break;
+	    }
+	}
+      else
+	r = bfd_reloc_notsupported;
+
+      if (r != bfd_reloc_ok)
+	{
+	  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 (r)
+	    {
+	    case bfd_reloc_overflow:
+	      (*info->callbacks->reloc_overflow) (info, NULL, name,
+						  howto->name, (bfd_vma) 0,
+						  input_bfd, input_section,
+						  rel->r_offset);
+	      break;
+
+	    case bfd_reloc_undefined:
+	      (*info->callbacks->undefined_symbol) (info, name, input_bfd,
+						    input_section,
+						    rel->r_offset, TRUE);
+	      break;
+
+	    case bfd_reloc_outofrange:
+	      if (msg == NULL)
+		msg = _("relocation out of range");
+	      break;
+
+	    case bfd_reloc_notsupported:
+	      if (msg == NULL)
+		msg = _("unsupported relocation");
+	      break;
+
+	    case bfd_reloc_dangerous:
+	      if (msg == NULL)
+		msg = _("dangerous relocation");
+	      break;
+
+	    default:
+	      if (msg == NULL)
+		msg = _("unknown error");
+	      break;
+	    }
+
+	  if (msg)
+	    {
+	      (*info->callbacks->warning) (info, msg, name, input_bfd,
+					   input_section, rel->r_offset);
+	      return FALSE;
+	    }
+	}
+    }
+  return TRUE;
+}
+
+
+/* Perform a diff relocation.  Nothing to do, as the difference value is
+   already written into the section's contents.  */
+
+static bfd_reloc_status_type
+bfd_elf_pru_diff_relocate (bfd *abfd ATTRIBUTE_UNUSED,
+			   arelent *reloc_entry ATTRIBUTE_UNUSED,
+			   asymbol *symbol ATTRIBUTE_UNUSED,
+			   void *data ATTRIBUTE_UNUSED,
+			   asection *input_section ATTRIBUTE_UNUSED,
+			   bfd *output_bfd ATTRIBUTE_UNUSED,
+			   char **error_message ATTRIBUTE_UNUSED)
+{
+  return bfd_reloc_ok;
+}
+
+
+/* Returns whether the relocation type passed is a diff reloc.  */
+
+static bfd_boolean
+elf32_pru_is_diff_reloc (Elf_Internal_Rela *irel)
+{
+  return (ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF8
+	  || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF16
+	  || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF32
+	  || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF16_PMEM
+	  || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF32_PMEM);
+}
+
+/* Reduce the diff value written in the section by count if the shrinked
+   insn address happens to fall between the two symbols for which this
+   diff reloc was emitted.  */
+
+static void
+elf32_pru_adjust_diff_reloc_value (bfd *abfd,
+				   struct bfd_section *isec,
+				   Elf_Internal_Rela *irel,
+				   bfd_vma symval,
+				   bfd_vma shrinked_insn_address,
+				   int count)
+{
+  unsigned char *reloc_contents = NULL;
+  unsigned char *isec_contents = elf_section_data (isec)->this_hdr.contents;
+  if (isec_contents == NULL)
+  {
+    if (! bfd_malloc_and_get_section (abfd, isec, &isec_contents))
+      return;
+
+    elf_section_data (isec)->this_hdr.contents = isec_contents;
+  }
+
+  reloc_contents = isec_contents + irel->r_offset;
+
+  /* Read value written in object file.  */
+  bfd_signed_vma x = 0;
+  switch (ELF32_R_TYPE (irel->r_info))
+  {
+  case R_PRU_GNU_DIFF8:
+    {
+      x = bfd_get_signed_8 (abfd, reloc_contents);
+      break;
+    }
+  case R_PRU_GNU_DIFF16:
+    {
+      x = bfd_get_signed_16 (abfd, reloc_contents);
+      break;
+    }
+  case R_PRU_GNU_DIFF32:
+    {
+      x = bfd_get_signed_32 (abfd, reloc_contents);
+      break;
+    }
+  case R_PRU_GNU_DIFF16_PMEM:
+    {
+      x = bfd_get_signed_16 (abfd, reloc_contents) * 4;
+      break;
+    }
+  case R_PRU_GNU_DIFF32_PMEM:
+    {
+      x = bfd_get_signed_32 (abfd, reloc_contents) * 4;
+      break;
+    }
+  default:
+    {
+      BFD_FAIL ();
+    }
+  }
+
+  /* For a diff reloc sym1 - sym2 the diff at assembly time (x) is written
+     into the object file at the reloc offset.  sym2's logical value is
+     symval (<start_of_section>) + reloc addend.  Compute the start and end
+     addresses and check if the shrinked insn falls between sym1 and sym2.  */
+
+  bfd_vma end_address = symval + irel->r_addend;
+  bfd_vma start_address = end_address - x;
+
+  /* Shrink the absolute DIFF value (get the to labels "closer"
+     together), because we have removed data between labels.  */
+  if (x < 0)
+    {
+      x += count;
+      /* In case the signed x is negative, restore order.  */
+      SWAP_VALS (end_address, start_address);
+    }
+  else
+    {
+      x -= count;
+    }
+
+  /* Reduce the diff value by count bytes and write it back into section
+    contents.  */
+
+  if (shrinked_insn_address >= start_address
+      && shrinked_insn_address <= end_address)
+  {
+    switch (ELF32_R_TYPE (irel->r_info))
+    {
+    case R_PRU_GNU_DIFF8:
+      {
+	bfd_put_signed_8 (abfd, x & 0xFF, reloc_contents);
+	break;
+      }
+    case R_PRU_GNU_DIFF16:
+      {
+	bfd_put_signed_16 (abfd, x & 0xFFFF, reloc_contents);
+	break;
+      }
+    case R_PRU_GNU_DIFF32:
+      {
+	bfd_put_signed_32 (abfd, x & 0xFFFFFFFF, reloc_contents);
+	break;
+      }
+    case R_PRU_GNU_DIFF16_PMEM:
+      {
+	bfd_put_signed_16 (abfd, (x / 4) & 0xFFFF, reloc_contents);
+	break;
+      }
+    case R_PRU_GNU_DIFF32_PMEM:
+      {
+	bfd_put_signed_32 (abfd, (x / 4) & 0xFFFFFFFF, reloc_contents);
+	break;
+      }
+    default:
+      {
+	BFD_FAIL ();
+      }
+    }
+
+  }
+}
+
+/* Delete some bytes from a section while changing the size of an instruction.
+   The parameter "addr" denotes the section-relative offset pointing just
+   behind the shrinked instruction. "addr+count" point at the first
+   byte just behind the original unshrinked instruction.
+
+   Idea copied from the AVR port.  */
+
+static bfd_boolean
+pru_elf_relax_delete_bytes (bfd *abfd,
+			    asection *sec,
+			    bfd_vma addr,
+			    int count)
+{
+  Elf_Internal_Shdr *symtab_hdr;
+  unsigned int sec_shndx;
+  bfd_byte *contents;
+  Elf_Internal_Rela *irel, *irelend;
+  Elf_Internal_Sym *isym;
+  Elf_Internal_Sym *isymbuf = NULL;
+  bfd_vma toaddr;
+  struct elf_link_hash_entry **sym_hashes;
+  struct elf_link_hash_entry **end_hashes;
+  unsigned int symcount;
+
+  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+  sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+  contents = elf_section_data (sec)->this_hdr.contents;
+
+  toaddr = sec->size;
+
+  irel = elf_section_data (sec)->relocs;
+  irelend = irel + sec->reloc_count;
+
+  /* Actually delete the bytes.  */
+  if (toaddr - addr - count > 0)
+    memmove (contents + addr, contents + addr + count,
+	     (size_t) (toaddr - addr - count));
+  sec->size -= count;
+
+  /* Adjust all the reloc addresses.  */
+  for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
+    {
+      bfd_vma old_reloc_address;
+
+      old_reloc_address = (sec->output_section->vma
+			   + sec->output_offset + irel->r_offset);
+
+      /* Get the new reloc address.  */
+      if ((irel->r_offset > addr
+	   && irel->r_offset < toaddr))
+	{
+	  if (debug_relax)
+	    printf ("Relocation at address 0x%x needs to be moved.\n"
+		    "Old section offset: 0x%x, New section offset: 0x%x \n",
+		    (unsigned int) old_reloc_address,
+		    (unsigned int) irel->r_offset,
+		    (unsigned int) ((irel->r_offset) - count));
+
+	  irel->r_offset -= count;
+	}
+
+    }
+
+   /* The reloc's own addresses are now ok.  However, we need to readjust
+      the reloc's addend, i.e. the reloc's value if two conditions are met:
+      1.) the reloc is relative to a symbol in this section that
+	  is located in front of the shrinked instruction
+      2.) symbol plus addend end up behind the shrinked instruction.
+
+      The most common case where this happens are relocs relative to
+      the section-start symbol.
+
+      This step needs to be done for all of the sections of the bfd.  */
+
+  {
+    struct bfd_section *isec;
+
+    for (isec = abfd->sections; isec; isec = isec->next)
+     {
+       bfd_vma symval;
+       bfd_vma shrinked_insn_address;
+
+       if (isec->reloc_count == 0)
+	 continue;
+
+       shrinked_insn_address = (sec->output_section->vma
+				+ sec->output_offset + addr - count);
+
+       irel = elf_section_data (isec)->relocs;
+       /* PR 12161: Read in the relocs for this section if necessary.  */
+       if (irel == NULL)
+	 irel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, TRUE);
+
+       for (irelend = irel + isec->reloc_count;
+	    irel < irelend;
+	    irel++)
+	 {
+	   /* Read this BFD's local symbols if we haven't done
+	      so already.  */
+	   if (isymbuf == NULL && symtab_hdr->sh_info != 0)
+	     {
+	       isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+	       if (isymbuf == NULL)
+		 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+						 symtab_hdr->sh_info, 0,
+						 NULL, NULL, NULL);
+	       if (isymbuf == NULL)
+		 return FALSE;
+	     }
+
+	   /* Get the value of the symbol referred to by the reloc.  */
+	   if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+	     {
+	       /* A local symbol.  */
+	       asection *sym_sec;
+
+	       isym = isymbuf + ELF32_R_SYM (irel->r_info);
+	       sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+	       symval = isym->st_value;
+	       /* If the reloc is absolute, it will not have
+		  a symbol or section associated with it.  */
+	       if (sym_sec == sec)
+		 {
+		   symval += sym_sec->output_section->vma
+		     + sym_sec->output_offset;
+
+		   if (debug_relax)
+		     printf ("Checking if the relocation's "
+			     "addend needs corrections.\n"
+			     "Address of anchor symbol: 0x%x \n"
+			     "Address of relocation target: 0x%x \n"
+			     "Address of relaxed insn: 0x%x \n",
+			     (unsigned int) symval,
+			     (unsigned int) (symval + irel->r_addend),
+			     (unsigned int) shrinked_insn_address);
+
+		   /* Shrink the special DIFF relocations.  */
+		   if (elf32_pru_is_diff_reloc (irel))
+		     {
+		       elf32_pru_adjust_diff_reloc_value (abfd, isec, irel,
+							  symval,
+							  shrinked_insn_address,
+							  count);
+		     }
+
+		   /* Fix the addend, if it is affected.  */
+		   if (symval <= shrinked_insn_address
+		       && (symval + irel->r_addend) > shrinked_insn_address)
+		     {
+
+		       irel->r_addend -= count;
+
+		       if (debug_relax)
+			 printf ("Relocation's addend needed to be fixed \n");
+		     }
+		 }
+	       /* else...Reference symbol is absolute.
+		  No adjustment needed.  */
+	     }
+	   /* else...Reference symbol is extern.  No need for adjusting
+	      the addend.  */
+	 }
+     }
+  }
+
+  /* Adjust the local symbols defined in this section.  */
+  isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+  /* Fix PR 9841, there may be no local symbols.  */
+  if (isym != NULL)
+    {
+      Elf_Internal_Sym *isymend;
+
+      isymend = isym + symtab_hdr->sh_info;
+      for (; isym < isymend; isym++)
+	{
+	  if (isym->st_shndx == sec_shndx)
+	    {
+	      if (isym->st_value > addr
+		  && isym->st_value <= toaddr)
+		isym->st_value -= count;
+
+	      if (isym->st_value <= addr
+		  && isym->st_value + isym->st_size > addr)
+		{
+		  /* If this assert fires then we have a symbol that ends
+		     part way through an instruction.  Does that make
+		     sense?  */
+		  BFD_ASSERT (isym->st_value + isym->st_size >= addr + count);
+		  isym->st_size -= count;
+		}
+	    }
+	}
+    }
+
+  /* Now adjust the global symbols defined in this section.  */
+  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+	      - symtab_hdr->sh_info);
+  sym_hashes = elf_sym_hashes (abfd);
+  end_hashes = sym_hashes + symcount;
+  for (; sym_hashes < end_hashes; sym_hashes++)
+    {
+      struct elf_link_hash_entry *sym_hash = *sym_hashes;
+      if ((sym_hash->root.type == bfd_link_hash_defined
+	   || sym_hash->root.type == bfd_link_hash_defweak)
+	  && sym_hash->root.u.def.section == sec)
+	{
+	  if (sym_hash->root.u.def.value > addr
+	      && sym_hash->root.u.def.value <= toaddr)
+	    sym_hash->root.u.def.value -= count;
+
+	  if (sym_hash->root.u.def.value <= addr
+	      && (sym_hash->root.u.def.value + sym_hash->size > addr))
+	    {
+	      /* If this assert fires then we have a symbol that ends
+		 part way through an instruction.  Does that make
+		 sense?  */
+	      BFD_ASSERT (sym_hash->root.u.def.value + sym_hash->size
+			  >= addr + count);
+	      sym_hash->size -= count;
+	    }
+	}
+    }
+
+  return TRUE;
+}
+
+static bfd_boolean
+pru_elf32_relax_section (bfd * abfd, asection * sec,
+			  struct bfd_link_info * link_info,
+			  bfd_boolean * again)
+{
+  Elf_Internal_Shdr * symtab_hdr;
+  Elf_Internal_Rela * internal_relocs;
+  Elf_Internal_Rela * irel;
+  Elf_Internal_Rela * irelend;
+  bfd_byte *	      contents = NULL;
+  Elf_Internal_Sym *  isymbuf = NULL;
+
+  /* Assume nothing changes.  */
+  *again = FALSE;
+
+  /* We don't have to do anything for a relocatable link, if
+     this section does not have relocs, or if this is not a
+     code section.  */
+  if (bfd_link_relocatable (link_info)
+    || (sec->flags & SEC_RELOC) == 0
+    || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
+    return TRUE;
+
+  symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+
+  /* Get a copy of the native relocations.  */
+  internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
+					       link_info->keep_memory);
+  if (internal_relocs == NULL)
+    goto error_return;
+
+  /* Walk through them looking for relaxing opportunities.  */
+  irelend = internal_relocs + sec->reloc_count;
+
+  for (irel = internal_relocs; irel < irelend; irel++)
+    {
+      bfd_vma symval;
+
+      /* Get the section contents if we haven't done so already.  */
+      if (contents == NULL)
+	{
+	  /* Get cached copy if it exists.  */
+	  if (elf_section_data (sec)->this_hdr.contents != NULL)
+	    contents = elf_section_data (sec)->this_hdr.contents;
+	  else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
+	    goto error_return;
+	}
+
+      /* Read this BFD's local symbols if we haven't done so already.  */
+      if (isymbuf == NULL && symtab_hdr->sh_info != 0)
+	{
+	  isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+	  if (isymbuf == NULL)
+	    isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+					    symtab_hdr->sh_info, 0,
+					    NULL, NULL, NULL);
+	  if (isymbuf == NULL)
+	    goto error_return;
+	}
+
+      /* Get the value of the symbol referred to by the reloc.  */
+      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+	{
+	  /* A local symbol.  */
+	  Elf_Internal_Sym *isym;
+	  asection *sym_sec;
+
+	  isym = isymbuf + ELF32_R_SYM (irel->r_info);
+	  if (isym->st_shndx == SHN_UNDEF)
+	    sym_sec = bfd_und_section_ptr;
+	  else if (isym->st_shndx == SHN_ABS)
+	    sym_sec = bfd_abs_section_ptr;
+	  else if (isym->st_shndx == SHN_COMMON)
+	    sym_sec = bfd_com_section_ptr;
+	  else
+	    sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+	  symval = (isym->st_value
+		    + sym_sec->output_section->vma + sym_sec->output_offset);
+	}
+      else
+	{
+	  unsigned long indx;
+	  struct elf_link_hash_entry *h;
+
+	  /* An external symbol.  */
+	  indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
+	  h = elf_sym_hashes (abfd)[indx];
+	  BFD_ASSERT (h != NULL);
+
+	  if (h->root.type != bfd_link_hash_defined
+	      && h->root.type != bfd_link_hash_defweak)
+	    /* This appears to be a reference to an undefined
+	       symbol.  Just ignore it--it will be caught by the
+	       regular reloc processing.  */
+	    continue;
+
+	  symval = (h->root.u.def.value
+		    + h->root.u.def.section->output_section->vma
+		    + h->root.u.def.section->output_offset);
+	}
+
+      /* For simplicity of coding, we are going to modify the section
+	 contents, the section relocs, and the BFD symbol table.  We
+	 must tell the rest of the code not to free up this
+	 information.  It would be possible to instead create a table
+	 of changes which have to be made, as is done in coff-mips.c;
+	 that would be more work, but would require less memory when
+	 the linker is run.  */
+
+      /* Check if we can remove an LDI instruction from the LDI32
+	 pseudo instruction if the upper 16 operand bits are zero.  */
+      if (ELF32_R_TYPE (irel->r_info) == (int) R_PRU_LDI32)
+	{
+	  bfd_vma value = symval + irel->r_addend;
+
+	  if (debug_relax)
+	    printf ("R_PRU_LDI32 with value=0x%lx\n", (long) value);
+
+	  if ((long) value >> 16 == 0)
+	    {
+	      /* Note that we've changed the relocs, section contents.  */
+	      elf_section_data (sec)->relocs = internal_relocs;
+	      elf_section_data (sec)->this_hdr.contents = contents;
+	      symtab_hdr->contents = (unsigned char *) isymbuf;
+
+	      /* Delete bytes.  */
+	      if (!pru_elf_relax_delete_bytes (abfd, sec, irel->r_offset + 4, 4))
+		goto error_return;
+
+	      /* We're done with deletion of the second instruction.
+		 Set a regular LDI relocation for the first instruction
+		 we left to load the 16-bit value into the 32-bit
+		 register.  */
+	      irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+					   R_PRU_U16);
+
+	      /* That will change things, so, we should relax again.
+		 Note that this is not required, and it may be slow.  */
+	      *again = TRUE;
+	    }
+	}
+    }
+
+  if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
+    {
+      if (!link_info->keep_memory)
+	free (isymbuf);
+      else
+	{
+	  /* Cache the symbols for elf_link_input_bfd.  */
+	  symtab_hdr->contents = (unsigned char *) isymbuf;
+	}
+    }
+
+  if (contents != NULL
+      && elf_section_data (sec)->this_hdr.contents != contents)
+    {
+      if (!link_info->keep_memory)
+	free (contents);
+      else
+	{
+	  /* Cache the section contents for elf_link_input_bfd.  */
+	  elf_section_data (sec)->this_hdr.contents = contents;
+	}
+    }
+
+  if (internal_relocs != NULL
+      && elf_section_data (sec)->relocs != internal_relocs)
+    free (internal_relocs);
+
+  return TRUE;
+
+error_return:
+  if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
+    free (isymbuf);
+  if (contents != NULL
+      && elf_section_data (sec)->this_hdr.contents != contents)
+    free (contents);
+  if (internal_relocs != NULL
+      && elf_section_data (sec)->relocs != internal_relocs)
+    free (internal_relocs);
+
+  return FALSE;
+}
+
+/* Free the derived linker hash table.  */
+static void
+pru_elf32_link_hash_table_free (bfd *obfd)
+{
+  _bfd_elf_link_hash_table_free (obfd);
+}
+
+/* Implement bfd_elf32_bfd_link_hash_table_create.  */
+static struct bfd_link_hash_table *
+pru_elf32_link_hash_table_create (bfd *abfd)
+{
+  struct elf_link_hash_table *ret;
+  bfd_size_type amt = sizeof (struct elf_link_hash_table);
+
+  ret = bfd_zmalloc (amt);
+  if (ret == NULL)
+    return NULL;
+
+  if (!_bfd_elf_link_hash_table_init (ret, abfd,
+				      link_hash_newfunc,
+				      sizeof (struct
+					      elf_link_hash_entry),
+				      PRU_ELF_DATA))
+    {
+      free (ret);
+      return NULL;
+    }
+
+  ret->root.hash_table_free = pru_elf32_link_hash_table_free;
+
+  return &ret->root;
+}
+
+#define ELF_ARCH			bfd_arch_pru
+#define ELF_TARGET_ID			PRU_ELF_DATA
+#define ELF_MACHINE_CODE		EM_TI_PRU
+
+#define ELF_MAXPAGESIZE			1
+
+#define bfd_elf32_bfd_link_hash_table_create \
+					  pru_elf32_link_hash_table_create
+
+/* Relocation table lookup macros.  */
+
+#define bfd_elf32_bfd_reloc_type_lookup	  pru_elf32_bfd_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup	  pru_elf32_bfd_reloc_name_lookup
+
+/* elf_info_to_howto (using RELA relocations).  */
+
+#define elf_info_to_howto		pru_elf32_info_to_howto
+
+/* elf backend functions.  */
+
+#define elf_backend_rela_normal		1
+
+#define elf_backend_relocate_section	pru_elf32_relocate_section
+#define bfd_elf32_bfd_relax_section	pru_elf32_relax_section
+
+#define TARGET_LITTLE_SYM		pru_elf32_vec
+#define TARGET_LITTLE_NAME		"elf32-pru"
+
+#include "elf32-target.h"