--- /dev/null
+/* Xilinx MicroBlaze-specific support for 32-bit ELF
+
+ Copyright 2009 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. */
+
+
+int dbg = 0;
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "bfdlink.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/microblaze.h"
+#include <assert.h>
+
+#define USE_RELA /* Only USE_REL is actually significant, but this is
+ here are a reminder... */
+#define INST_WORD_SIZE 4
+
+static int ro_small_data_pointer = 0;
+static int rw_small_data_pointer = 0;
+
+static reloc_howto_type * microblaze_elf_howto_table [(int) R_MICROBLAZE_max];
+
+static reloc_howto_type microblaze_elf_howto_raw[] =
+{
+ /* This reloc does nothing. */
+ HOWTO (R_MICROBLAZE_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. */
+ NULL, /* Special Function. */
+ "R_MICROBLAZE_NONE", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* A standard 32 bit relocation. */
+ HOWTO (R_MICROBLAZE_32, /* 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_MICROBLAZE_32", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0xffffffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* A standard PCREL 32 bit relocation. */
+ HOWTO (R_MICROBLAZE_32_PCREL,/* 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_MICROBLAZE_32_PCREL", /* Name. */
+ TRUE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0xffffffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* A 64 bit PCREL relocation. Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_64_PCREL,/* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 16, /* Bitsize. */
+ TRUE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_dont, /* Complain on overflow. */
+ bfd_elf_generic_reloc,/* Special Function. */
+ "R_MICROBLAZE_64_PCREL", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* The low half of a PCREL 32 bit relocation. */
+ HOWTO (R_MICROBLAZE_32_PCREL_LO, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_32_PCREL_LO", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* A 64 bit relocation. Table entry not really used. */
+ HOWTO (R_MICROBLAZE_64, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_64", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* The low half of a 32 bit relocation. */
+ HOWTO (R_MICROBLAZE_32_LO, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 16, /* Bitsize. */
+ FALSE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_signed, /* Complain on overflow. */
+ bfd_elf_generic_reloc,/* Special Function. */
+ "R_MICROBLAZE_32_LO", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* Read-only small data section relocation. */
+ HOWTO (R_MICROBLAZE_SRO32, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_SRO32", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* Read-write small data area relocation. */
+ HOWTO (R_MICROBLAZE_SRW32, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_SRW32", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* This reloc does nothing. Used for relaxation. */
+ HOWTO (R_MICROBLAZE_64_NONE, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 32, /* Bitsize. */
+ TRUE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_bitfield, /* Complain on overflow. */
+ NULL, /* Special Function. */
+ "R_MICROBLAZE_64_NONE",/* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* Symbol Op Symbol relocation. */
+ HOWTO (R_MICROBLAZE_32_SYM_OP_SYM, /* 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_MICROBLAZE_32_SYM_OP_SYM", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0xffffffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* GNU extension to record C++ vtable hierarchy. */
+ HOWTO (R_MICROBLAZE_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_MICROBLAZE_GNU_VTINHERIT", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* GNU extension to record C++ vtable member usage. */
+ HOWTO (R_MICROBLAZE_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_MICROBLAZE_GNU_VTENTRY", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* A 64 bit GOTPC relocation. Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_GOTPC_64, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 16, /* Bitsize. */
+ TRUE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_dont, /* Complain on overflow. */
+ bfd_elf_generic_reloc, /* Special Function. */
+ "R_MICROBLAZE_GOTPC_64", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* A 64 bit GOT relocation. Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_GOT_64, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_GOT_64",/* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* A 64 bit PLT relocation. Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_PLT_64, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 16, /* Bitsize. */
+ TRUE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_dont, /* Complain on overflow. */
+ bfd_elf_generic_reloc,/* Special Function. */
+ "R_MICROBLAZE_PLT_64",/* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_REL, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 16, /* Bitsize. */
+ TRUE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_dont, /* Complain on overflow. */
+ bfd_elf_generic_reloc,/* Special Function. */
+ "R_MICROBLAZE_REL", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_JUMP_SLOT,/* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 16, /* Bitsize. */
+ TRUE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_dont, /* Complain on overflow. */
+ bfd_elf_generic_reloc,/* Special Function. */
+ "R_MICROBLAZE_JUMP_SLOT", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_GLOB_DAT,/* Type. */
+ 0, /* Rightshift. */
+ 2, /* Size (0 = byte, 1 = short, 2 = long). */
+ 16, /* Bitsize. */
+ TRUE, /* PC_relative. */
+ 0, /* Bitpos. */
+ complain_overflow_dont, /* Complain on overflow. */
+ bfd_elf_generic_reloc,/* Special Function. */
+ "R_MICROBLAZE_GLOB_DAT", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ TRUE), /* PC relative offset? */
+
+ /* A 64 bit GOT relative relocation. Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_GOTOFF_64, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_GOTOFF_64", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* A 32 bit GOT relative relocation. Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_GOTOFF_32, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_GOTOFF_32", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+
+ /* COPY relocation. Table-entry not really used. */
+ HOWTO (R_MICROBLAZE_COPY, /* Type. */
+ 0, /* Rightshift. */
+ 2, /* 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_MICROBLAZE_COPY", /* Name. */
+ FALSE, /* Partial Inplace. */
+ 0, /* Source Mask. */
+ 0x0000ffff, /* Dest Mask. */
+ FALSE), /* PC relative offset? */
+};
+
+#ifndef NUM_ELEM
+#define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
+#endif
+\f
+/* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */
+
+static void
+microblaze_elf_howto_init (void)
+{
+ unsigned int i;
+
+ for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;)
+ {
+ unsigned int type;
+
+ type = microblaze_elf_howto_raw[i].type;
+
+ BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table));
+
+ microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i];
+ }
+}
+\f
+static reloc_howto_type *
+microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE;
+
+ switch (code)
+ {
+ case BFD_RELOC_NONE:
+ microblaze_reloc = R_MICROBLAZE_NONE;
+ break;
+ case BFD_RELOC_MICROBLAZE_64_NONE:
+ microblaze_reloc = R_MICROBLAZE_64_NONE;
+ break;
+ case BFD_RELOC_32:
+ microblaze_reloc = R_MICROBLAZE_32;
+ break;
+ /* RVA is treated the same as 32 */
+ case BFD_RELOC_RVA:
+ microblaze_reloc = R_MICROBLAZE_32;
+ break;
+ case BFD_RELOC_32_PCREL:
+ microblaze_reloc = R_MICROBLAZE_32_PCREL;
+ break;
+ case BFD_RELOC_64_PCREL:
+ microblaze_reloc = R_MICROBLAZE_64_PCREL;
+ break;
+ case BFD_RELOC_MICROBLAZE_32_LO_PCREL:
+ microblaze_reloc = R_MICROBLAZE_32_PCREL_LO;
+ break;
+ case BFD_RELOC_64:
+ microblaze_reloc = R_MICROBLAZE_64;
+ break;
+ case BFD_RELOC_MICROBLAZE_32_LO:
+ microblaze_reloc = R_MICROBLAZE_32_LO;
+ break;
+ case BFD_RELOC_MICROBLAZE_32_ROSDA:
+ microblaze_reloc = R_MICROBLAZE_SRO32;
+ break;
+ case BFD_RELOC_MICROBLAZE_32_RWSDA:
+ microblaze_reloc = R_MICROBLAZE_SRW32;
+ break;
+ case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM:
+ microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM;
+ break;
+ case BFD_RELOC_VTABLE_INHERIT:
+ microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT;
+ break;
+ case BFD_RELOC_VTABLE_ENTRY:
+ microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY;
+ break;
+ case BFD_RELOC_MICROBLAZE_64_GOTPC:
+ microblaze_reloc = R_MICROBLAZE_GOTPC_64;
+ break;
+ case BFD_RELOC_MICROBLAZE_64_GOT:
+ microblaze_reloc = R_MICROBLAZE_GOT_64;
+ break;
+ case BFD_RELOC_MICROBLAZE_64_PLT:
+ microblaze_reloc = R_MICROBLAZE_PLT_64;
+ break;
+ case BFD_RELOC_MICROBLAZE_64_GOTOFF:
+ microblaze_reloc = R_MICROBLAZE_GOTOFF_64;
+ break;
+ case BFD_RELOC_MICROBLAZE_32_GOTOFF:
+ microblaze_reloc = R_MICROBLAZE_GOTOFF_32;
+ break;
+ case BFD_RELOC_MICROBLAZE_COPY:
+ microblaze_reloc = R_MICROBLAZE_COPY;
+ break;
+ default:
+ return (reloc_howto_type *) NULL;
+ }
+
+ if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
+ /* Initialize howto table if needed. */
+ microblaze_elf_howto_init ();
+
+ return microblaze_elf_howto_table [(int) microblaze_reloc];
+};
+
+static reloc_howto_type *
+microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++)
+ if (microblaze_elf_howto_raw[i].name != NULL
+ && strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0)
+ return µblaze_elf_howto_raw[i];
+
+ return NULL;
+}
+
+/* Set the howto pointer for a RCE ELF reloc. */
+
+static void
+microblaze_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
+ arelent * cache_ptr,
+ Elf_Internal_Rela * dst)
+{
+ if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
+ /* Initialize howto table if needed. */
+ microblaze_elf_howto_init ();
+
+ BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MICROBLAZE_max);
+
+ cache_ptr->howto = microblaze_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
+}
+
+/* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
+
+static bfd_boolean
+microblaze_elf_is_local_label_name (bfd *abfd, const char *name)
+{
+ if (name[0] == 'L' && name[1] == '.')
+ return TRUE;
+
+ if (name[0] == '$' && name[1] == 'L')
+ return TRUE;
+
+ /* With gcc, the labels go back to starting with '.', so we accept
+ the generic ELF local label syntax as well. */
+ return _bfd_elf_is_local_label_name (abfd, name);
+}
+
+/* The microblaze linker (like many others) needs to keep track of
+ the number of relocs that it decides to copy as dynamic relocs in
+ check_relocs for each symbol. This is so that it can later discard
+ them if they are found to be unnecessary. We store the information
+ in a field extending the regular ELF linker hash table. */
+
+struct elf32_mb_dyn_relocs
+{
+ struct elf32_mb_dyn_relocs *next;
+
+ /* The input section of the reloc. */
+ asection *sec;
+
+ /* Total number of relocs copied for the input section. */
+ bfd_size_type count;
+
+ /* Number of pc-relative relocs copied for the input section. */
+ bfd_size_type pc_count;
+};
+
+/* ELF linker hash entry. */
+
+struct elf32_mb_link_hash_entry
+{
+ struct elf_link_hash_entry elf;
+
+ /* Track dynamic relocs copied for this symbol. */
+ struct elf32_mb_dyn_relocs *dyn_relocs;
+
+};
+
+#define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent))
+
+/* ELF linker hash table. */
+
+struct elf32_mb_link_hash_table
+{
+ struct elf_link_hash_table elf;
+
+ /* Short-cuts to get to dynamic linker sections. */
+ asection *sgot;
+ asection *sgotplt;
+ asection *srelgot;
+ asection *splt;
+ asection *srelplt;
+ asection *sdynbss;
+ asection *srelbss;
+
+ /* Small local sym to section mapping cache. */
+ struct sym_cache sym_sec;
+};
+
+/* Get the ELF linker hash table from a link_info structure. */
+
+#define elf32_mb_hash_table(p) \
+ ((struct elf32_mb_link_hash_table *) ((p)->hash))
+
+/* Create an entry in a microblaze 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 elf32_mb_link_hash_entry));
+ if (entry == NULL)
+ return entry;
+ }
+
+ /* Call the allocation method of the superclass. */
+ entry = _bfd_elf_link_hash_newfunc (entry, table, string);
+ if (entry != NULL)
+ {
+ struct elf32_mb_link_hash_entry *eh;
+
+ eh = (struct elf32_mb_link_hash_entry *) entry;
+ eh->dyn_relocs = NULL;
+ }
+
+ return entry;
+}
+
+/* Create a mb ELF linker hash table. */
+
+static struct bfd_link_hash_table *
+microblaze_elf_link_hash_table_create (bfd *abfd)
+{
+ struct elf32_mb_link_hash_table *ret;
+ bfd_size_type amt = sizeof (struct elf32_mb_link_hash_table);
+
+ ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt);
+ if (ret == NULL)
+ return NULL;
+
+ if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
+ sizeof (struct elf32_mb_link_hash_entry)))
+ {
+ free (ret);
+ return NULL;
+ }
+
+ return &ret->elf.root;
+}
+\f
+/* Set the values of the small data pointers. */
+
+static void
+microblaze_elf_final_sdp (struct bfd_link_info *info)
+{
+ struct bfd_link_hash_entry *h;
+
+ h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
+ if (h != (struct bfd_link_hash_entry *) NULL
+ && h->type == bfd_link_hash_defined)
+ ro_small_data_pointer = (h->u.def.value
+ + h->u.def.section->output_section->vma
+ + h->u.def.section->output_offset);
+
+ h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE);
+ if (h != (struct bfd_link_hash_entry *) NULL
+ && h->type == bfd_link_hash_defined)
+ rw_small_data_pointer = (h->u.def.value
+ + h->u.def.section->output_section->vma
+ + h->u.def.section->output_offset);
+}
+
+/* This code is taken from elf32-m32r.c
+ There is some attempt to make this function usable for many architectures,
+ both USE_REL and USE_RELA ['twould be nice if such a critter existed],
+ if only to serve as a learning tool.
+
+ 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 adjust 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
+microblaze_elf_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)
+{
+ struct elf32_mb_link_hash_table *htab;
+ Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
+ Elf_Internal_Rela *rel, *relend;
+ /* Assume success. */
+ bfd_boolean ret = TRUE;
+ asection *sreloc;
+ bfd_vma *local_got_offsets;
+
+ if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1])
+ microblaze_elf_howto_init ();
+
+ htab = elf32_mb_hash_table (info);
+ local_got_offsets = elf_local_got_offsets (input_bfd);
+
+ sreloc = elf_section_data (input_section)->sreloc;
+
+ rel = relocs;
+ relend = relocs + input_section->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ int r_type;
+ reloc_howto_type *howto;
+ unsigned long r_symndx;
+ bfd_vma addend = rel->r_addend;
+ bfd_vma offset = rel->r_offset;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+ asection *sec;
+ const char *sym_name;
+ bfd_reloc_status_type r = bfd_reloc_ok;
+ const char *errmsg = NULL;
+ bfd_boolean unresolved_reloc = FALSE;
+
+ h = NULL;
+ r_type = ELF32_R_TYPE (rel->r_info);
+ if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max)
+ {
+ (*_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 = microblaze_elf_howto_table[r_type];
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ if (info->relocatable)
+ {
+ /* This is a relocatable 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. */
+ sec = NULL;
+ if (r_symndx >= symtab_hdr->sh_info)
+ /* External symbol. */
+ continue;
+
+ /* Local symbol. */
+ sym = local_syms + r_symndx;
+ sym_name = "<local symbol>";
+ /* STT_SECTION: symbol is associated with a section. */
+ if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
+ /* Symbol isn't associated with a section. Nothing to do. */
+ continue;
+
+ sec = local_sections[r_symndx];
+ addend += sec->output_offset + sym->st_value;
+#ifndef USE_REL
+ /* This can't be done for USE_REL because it doesn't mean anything
+ and elf_link_input_bfd asserts this stays zero. */
+ /* rel->r_addend = addend; */
+#endif
+
+#ifndef USE_REL
+ /* Addends are stored with relocs. We're done. */
+ continue;
+#else /* USE_REL */
+ /* If partial_inplace, we need to store any additional addend
+ back in the section. */
+ if (!howto->partial_inplace)
+ continue;
+ /* ??? Here is a nice place to call a special_function like handler. */
+ r = _bfd_relocate_contents (howto, input_bfd, addend,
+ contents + offset);
+#endif /* USE_REL */
+ }
+ else
+ {
+ bfd_vma relocation;
+
+ /* This is a final link. */
+ sym = NULL;
+ sec = NULL;
+ unresolved_reloc = FALSE;
+
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ /* Local symbol. */
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
+ if (sec == 0)
+ continue;
+ sym_name = "<local symbol>";
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
+ /* r_addend may have changed if the reference section was
+ a merge section. */
+ addend = rel->r_addend;
+ }
+ else
+ {
+ /* External symbol. */
+ bfd_boolean warned ATTRIBUTE_UNUSED;
+
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h, sec, relocation,
+ unresolved_reloc, warned);
+ sym_name = h->root.root.string;
+ }
+
+ /* Sanity check the address. */
+ if (offset > bfd_get_section_limit (output_bfd, input_section))
+ {
+ r = bfd_reloc_outofrange;
+ goto check_reloc;
+ }
+
+ switch ((int) r_type)
+ {
+ case (int) R_MICROBLAZE_SRO32 :
+ {
+ const char *name;
+
+ /* Only relocate if the symbol is defined. */
+ if (sec)
+ {
+ name = bfd_get_section_name (abfd, sec);
+
+ if (strcmp (name, ".sdata2") == 0
+ || strcmp (name, ".sbss2") == 0)
+ {
+ if (ro_small_data_pointer == 0)
+ microblaze_elf_final_sdp (info);
+ if (ro_small_data_pointer == 0)
+ {
+ ret = FALSE;
+ r = bfd_reloc_undefined;
+ goto check_reloc;
+ }
+
+ /* At this point `relocation' contains the object's
+ address. */
+ relocation -= ro_small_data_pointer;
+ /* Now it contains the offset from _SDA2_BASE_. */
+ r = _bfd_final_link_relocate (howto, input_bfd,
+ input_section,
+ contents, offset,
+ relocation, addend);
+ }
+ else
+ {
+ (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
+ bfd_get_filename (input_bfd),
+ sym_name,
+ microblaze_elf_howto_table[(int) r_type]->name,
+ bfd_get_section_name (abfd, sec));
+ /*bfd_set_error (bfd_error_bad_value); ??? why? */
+ ret = FALSE;
+ continue;
+ }
+ }
+ }
+ break;
+
+ case (int) R_MICROBLAZE_SRW32 :
+ {
+ const char *name;
+
+ /* Only relocate if the symbol is defined. */
+ if (sec)
+ {
+ name = bfd_get_section_name (abfd, sec);
+
+ if (strcmp (name, ".sdata") == 0
+ || strcmp (name, ".sbss") == 0)
+ {
+ if (rw_small_data_pointer == 0)
+ microblaze_elf_final_sdp (info);
+ if (rw_small_data_pointer == 0)
+ {
+ ret = FALSE;
+ r = bfd_reloc_undefined;
+ goto check_reloc;
+ }
+
+ /* At this point `relocation' contains the object's
+ address. */
+ relocation -= rw_small_data_pointer;
+ /* Now it contains the offset from _SDA_BASE_. */
+ r = _bfd_final_link_relocate (howto, input_bfd,
+ input_section,
+ contents, offset,
+ relocation, addend);
+ }
+ else
+ {
+ (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
+ bfd_get_filename (input_bfd),
+ sym_name,
+ microblaze_elf_howto_table[(int) r_type]->name,
+ bfd_get_section_name (abfd, sec));
+ /*bfd_set_error (bfd_error_bad_value); ??? why? */
+ ret = FALSE;
+ continue;
+ }
+ }
+ }
+ break;
+
+ case (int) R_MICROBLAZE_32_SYM_OP_SYM:
+ break; /* Do nothing. */
+
+ case (int) R_MICROBLAZE_GOTPC_64:
+ relocation = htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset;
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + offset + INST_WORD_SIZE);
+ relocation += addend;
+ bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
+ contents + offset + 2);
+ bfd_put_16 (input_bfd, relocation & 0xffff,
+ contents + offset + 2 + INST_WORD_SIZE);
+ break;
+
+ case (int) R_MICROBLAZE_PLT_64:
+ {
+ bfd_vma immediate;
+ if (htab->splt != NULL && h != NULL
+ && h->plt.offset != (bfd_vma) -1)
+ {
+ relocation = (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + h->plt.offset);
+ unresolved_reloc = FALSE;
+ immediate = relocation - (input_section->output_section->vma
+ + input_section->output_offset
+ + offset + INST_WORD_SIZE);
+ bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
+ contents + offset + 2);
+ bfd_put_16 (input_bfd, immediate & 0xffff,
+ contents + offset + 2 + INST_WORD_SIZE);
+ }
+ else
+ {
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + offset + INST_WORD_SIZE);
+ immediate = relocation;
+ bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff,
+ contents + offset + 2);
+ bfd_put_16 (input_bfd, immediate & 0xffff,
+ contents + offset + 2 + INST_WORD_SIZE);
+ }
+ break;
+ }
+
+ case (int) R_MICROBLAZE_GOT_64:
+ {
+ if (htab->sgot == NULL)
+ abort ();
+ if (h == NULL)
+ {
+ bfd_vma off;
+ if (local_got_offsets == NULL)
+ abort ();
+ off = local_got_offsets[r_symndx];
+ /* The LSB indicates whether we've already
+ created relocation. */
+ if (off & 1)
+ off &= ~1;
+ else
+ {
+ bfd_put_32 (output_bfd, relocation + addend,
+ htab->sgot->contents + off);
+
+ if (info->shared)
+ {
+ Elf_Internal_Rela outrel;
+ bfd_byte *loc;
+ if (htab->srelgot == NULL)
+ abort ();
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ + off);
+ outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
+ outrel.r_addend = relocation + addend;
+ loc = htab->srelgot->contents;
+ loc += htab->srelgot->reloc_count++
+ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+ }
+ local_got_offsets[r_symndx] |= 1;
+ }
+ relocation = htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off
+ - htab->sgotplt->output_section->vma
+ - htab->sgotplt->output_offset;
+ unresolved_reloc = FALSE;
+ }
+ else
+ {
+ if (htab->sgotplt != NULL && h != NULL
+ && h->got.offset != (bfd_vma) -1)
+ {
+ bfd_put_32 (output_bfd, relocation + addend,
+ htab->sgot->contents + h->got.offset);
+ relocation = htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ + h->got.offset
+ - htab->sgotplt->output_section->vma
+ - htab->sgotplt->output_offset;
+ unresolved_reloc = FALSE;
+ }
+ else
+ abort (); /* ??? */
+ }
+ bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
+ contents + offset + 2);
+ bfd_put_16 (input_bfd, relocation & 0xffff,
+ contents + offset + 2 + INST_WORD_SIZE);
+ break;
+ }
+
+ case (int) R_MICROBLAZE_GOTOFF_64:
+ {
+ bfd_vma immediate;
+ unsigned short lo, high;
+ relocation += addend;
+ relocation -= htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset;
+ /* Write this value into correct location. */
+ immediate = relocation;
+ lo = immediate & 0x0000ffff;
+ high = (immediate >> 16) & 0x0000ffff;
+ bfd_put_16 (input_bfd, high, contents + offset + 2);
+ bfd_put_16 (input_bfd, lo, contents + offset + INST_WORD_SIZE + 2);
+ break;
+ }
+
+ case (int) R_MICROBLAZE_GOTOFF_32:
+ {
+ relocation += addend;
+ relocation -= htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset;
+ /* Write this value into correct location. */
+ bfd_put_32 (input_bfd, relocation, contents + offset);
+ break;
+ }
+
+ case (int) R_MICROBLAZE_64_PCREL :
+ case (int) R_MICROBLAZE_64:
+ case (int) R_MICROBLAZE_32:
+ {
+ /* r_symndx will be zero only for relocs against symbols
+ from removed linkonce sections, or sections discarded by
+ a linker script. */
+ if (r_symndx == 0 || (input_section->flags & SEC_ALLOC) == 0)
+ {
+ relocation += addend;
+ if (r_type == R_MICROBLAZE_32)
+ bfd_put_32 (input_bfd, relocation, contents + offset);
+ else
+ {
+ if (r_type == R_MICROBLAZE_64_PCREL)
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + offset + INST_WORD_SIZE);
+ bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
+ contents + offset + 2);
+ bfd_put_16 (input_bfd, relocation & 0xffff,
+ contents + offset + 2 + INST_WORD_SIZE);
+ }
+ break;
+ }
+
+ if ((info->shared
+ && (h == NULL
+ || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
+ || h->root.type != bfd_link_hash_undefweak)
+ && (!howto->pc_relative
+ || (h != NULL
+ && h->dynindx != -1
+ && (!info->symbolic
+ || !h->def_regular))))
+ || (!info->shared
+ && h != NULL
+ && h->dynindx != -1
+ && !h->non_got_ref
+ && ((h->def_dynamic
+ && !h->def_regular)
+ || h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_undefined)))
+ {
+ Elf_Internal_Rela outrel;
+ bfd_byte *loc;
+ bfd_boolean skip, relocate = FALSE;
+
+ /* When generating a shared object, these relocations
+ are copied into the output file to be resolved at run
+ time. */
+
+ BFD_ASSERT (sreloc != NULL);
+
+ skip = FALSE;
+
+ outrel.r_offset =
+ _bfd_elf_section_offset (output_bfd, info, input_section,
+ rel->r_offset);
+ if (outrel.r_offset == (bfd_vma) -1)
+ skip = TRUE;
+ else if (outrel.r_offset == (bfd_vma) -2)
+ skip = TRUE, relocate = TRUE;
+ outrel.r_offset += (input_section->output_section->vma
+ + input_section->output_offset);
+
+ if (skip)
+ memset (&outrel, 0, sizeof outrel);
+ /* h->dynindx may be -1 if the symbol was marked to
+ become local. */
+ else if (h != NULL
+ && ((! info->symbolic && h->dynindx != -1)
+ || !h->def_regular))
+ {
+ BFD_ASSERT (h->dynindx != -1);
+ outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+ outrel.r_addend = addend;
+ }
+ else
+ {
+ if (r_type == R_MICROBLAZE_32)
+ {
+ outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
+ outrel.r_addend = relocation + addend;
+ }
+ else
+ {
+ BFD_FAIL ();
+ (*_bfd_error_handler)
+ (_("%B: probably compiled without -fPIC?"),
+ input_bfd);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ }
+
+ loc = sreloc->contents;
+ loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
+ break;
+ }
+ else
+ {
+ relocation += addend;
+ if (r_type == R_MICROBLAZE_32)
+ bfd_put_32 (input_bfd, relocation, contents + offset);
+ else
+ {
+ if (r_type == R_MICROBLAZE_64_PCREL)
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + offset + INST_WORD_SIZE);
+ bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff,
+ contents + offset + 2);
+ bfd_put_16 (input_bfd, relocation & 0xffff,
+ contents + offset + 2 + INST_WORD_SIZE);
+ }
+ break;
+ }
+ }
+
+ default :
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, offset,
+ relocation, addend);
+ break;
+ }
+ }
+
+ check_reloc:
+
+ if (r != bfd_reloc_ok)
+ {
+ /* FIXME: This should be generic enough to go in a utility. */
+ 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 || *name == '\0')
+ name = bfd_section_name (input_bfd, sec);
+ }
+
+ if (errmsg != NULL)
+ goto common_error;
+
+ switch (r)
+ {
+ case bfd_reloc_overflow:
+ if (!((*info->callbacks->reloc_overflow)
+ (info, (h ? &h->root : NULL), name, howto->name,
+ (bfd_vma) 0, input_bfd, input_section, offset)))
+ return FALSE;
+ break;
+
+ case bfd_reloc_undefined:
+ if (!((*info->callbacks->undefined_symbol)
+ (info, name, input_bfd, input_section, offset, TRUE)))
+ return FALSE;
+ break;
+
+ case bfd_reloc_outofrange:
+ errmsg = _("internal error: out of range error");
+ goto common_error;
+
+ case bfd_reloc_notsupported:
+ errmsg = _("internal error: unsupported relocation error");
+ goto common_error;
+
+ case bfd_reloc_dangerous:
+ errmsg = _("internal error: dangerous error");
+ goto common_error;
+
+ default:
+ errmsg = _("internal error: unknown error");
+ /* Fall through. */
+ common_error:
+ if (!((*info->callbacks->warning)
+ (info, errmsg, name, input_bfd, input_section, offset)))
+ return FALSE;
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
+\f
+/* Calculate fixup value for reference. */
+
+static int
+calc_fixup (bfd_vma addr, asection *sec)
+{
+ int i, fixup = 0;
+
+ if (sec == NULL || sec->relax == NULL)
+ return 0;
+
+ /* Look for addr in relax table, total fixup value. */
+ for (i = 0; i < sec->relax_count; i++)
+ {
+ if (addr <= sec->relax[i].addr)
+ break;
+ fixup += sec->relax[i].size;
+ }
+
+ return fixup;
+}
+
+static bfd_boolean
+microblaze_elf_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 *free_relocs = NULL;
+ Elf_Internal_Rela *irel, *irelend;
+ bfd_byte *contents = NULL;
+ bfd_byte *free_contents = NULL;
+ int rel_count;
+ unsigned int shndx;
+ int i, index;
+ asection *o;
+ struct elf_link_hash_entry *sym_hash;
+ Elf_Internal_Sym *isymbuf, *isymend;
+ Elf_Internal_Sym *isym;
+ int symcount;
+ int offset;
+ bfd_vma src, dest;
+
+ /* We only do this once per section. We may be able to delete some code
+ by running multiple passes, but it is not worth it. */
+ *again = FALSE;
+
+ /* Only do this for a text section. */
+ if (link_info->relocatable
+ || (sec->flags & SEC_RELOC) == 0
+ || (sec->reloc_count == 0))
+ return TRUE;
+
+ BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0));
+
+ /* If this is the first time we have been called for this section,
+ initialize the cooked size. */
+ if (sec->size == 0)
+ sec->size = sec->rawsize;
+
+ /* Get symbols for this section. */
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount,
+ 0, NULL, NULL, NULL);
+ BFD_ASSERT (isymbuf != NULL);
+
+ internal_relocs = _bfd_elf_link_read_relocs
+ (abfd, sec, NULL, NULL, link_info->keep_memory);
+ if (internal_relocs == NULL)
+ goto error_return;
+ if (! link_info->keep_memory)
+ free_relocs = internal_relocs;
+
+ sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1)
+ * sizeof (struct relax_table));
+ if (sec->relax == NULL)
+ goto error_return;
+ sec->relax_count = 0;
+
+ irelend = internal_relocs + sec->reloc_count;
+ rel_count = 0;
+ for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
+ {
+ bfd_vma symval;
+ if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL)
+ && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 ))
+ continue; /* Can't delete this reloc. */
+
+ /* Get the section contents. */
+ if (contents == NULL)
+ {
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ contents = elf_section_data (sec)->this_hdr.contents;
+ else
+ {
+ contents = (bfd_byte *) bfd_malloc (sec->size);
+ if (contents == NULL)
+ goto error_return;
+ free_contents = contents;
+
+ if (!bfd_get_section_contents (abfd, sec, contents,
+ (file_ptr) 0, sec->size))
+ goto error_return;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ }
+ }
+
+ /* 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 = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
+ }
+ else
+ {
+ unsigned long indx;
+ struct elf_link_hash_entry *h;
+
+ 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);
+ }
+
+ /* If this is a PC-relative reloc, subtract the instr offset from
+ the symbol value. */
+ if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL)
+ {
+ symval = symval + irel->r_addend
+ - (irel->r_offset
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+ else
+ symval += irel->r_addend;
+
+ if ((symval & 0xffff8000) == 0
+ || (symval & 0xffff8000) == 0xffff8000)
+ {
+ /* We can delete this instruction. */
+ sec->relax[sec->relax_count].addr = irel->r_offset;
+ sec->relax[sec->relax_count].size = INST_WORD_SIZE;
+ sec->relax_count++;
+
+ /* Rewrite relocation type. */
+ switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
+ {
+ case R_MICROBLAZE_64_PCREL:
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ (int) R_MICROBLAZE_32_PCREL_LO);
+ break;
+ case R_MICROBLAZE_64:
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ (int) R_MICROBLAZE_32_LO);
+ break;
+ default:
+ /* Cannot happen. */
+ BFD_ASSERT (FALSE);
+ }
+ }
+ } /* Loop through all relocations. */
+
+ /* Loop through the relocs again, and see if anything needs to change. */
+ if (sec->relax_count > 0)
+ {
+ shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+ rel_count = 0;
+ sec->relax[sec->relax_count].addr = sec->size;
+
+ for (irel = internal_relocs; irel < irelend; irel++, rel_count++)
+ {
+ bfd_vma nraddr;
+
+ /* Get the new reloc address. */
+ nraddr = irel->r_offset - calc_fixup (irel->r_offset, sec);
+ switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info))
+ {
+ default:
+ break;
+ case R_MICROBLAZE_64_PCREL:
+ break;
+ case R_MICROBLAZE_64:
+ case R_MICROBLAZE_32_LO:
+ /* If this reloc is against a symbol defined in this
+ section, we must check the addend to see it will put the value in
+ range to be adjusted, and hence must be changed. */
+ if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+ {
+ Elf_Internal_Sym *isym;
+ isym = isymbuf + ELF32_R_SYM (irel->r_info);
+ /* Only handle relocs against .text. */
+ if (isym->st_shndx == shndx
+ && ELF32_ST_TYPE (isym->st_info) == STT_SECTION)
+ irel->r_addend -= calc_fixup (irel->r_addend, sec);
+ }
+ break;
+ case R_MICROBLAZE_NONE:
+ {
+ /* This was a PC-relative instruction that was
+ completely resolved. */
+ int sfix, efix;
+ bfd_vma target_address;
+ target_address = irel->r_addend + irel->r_offset;
+ sfix = calc_fixup (irel->r_offset, sec);
+ efix = calc_fixup (target_address, sec);
+ irel->r_addend -= (efix - sfix);
+ /* Should use HOWTO. */
+ bfd_put_16 (abfd, irel->r_addend, contents + irel->r_offset + 2);
+ }
+ break;
+ case R_MICROBLAZE_64_NONE:
+ {
+ /* This was a PC-relative 64-bit instruction that was
+ completely resolved. */
+ int sfix, efix;
+ bfd_vma target_address;
+ target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE;
+ sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, sec);
+ efix = calc_fixup (target_address, sec);
+ irel->r_addend -= (efix - sfix);
+ bfd_put_16 (abfd, irel->r_addend, contents + irel->r_offset
+ + INST_WORD_SIZE + 2);
+ }
+ break;
+ }
+ irel->r_offset = nraddr;
+ } /* Change all relocs in this section. */
+
+ /* Look through all other sections. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ Elf_Internal_Rela *internal_relocs;
+ Elf_Internal_Rela *irelscan, *irelscanend;
+ bfd_byte *ocontents;
+
+ if (o == sec
+ || (o->flags & SEC_RELOC) == 0
+ || o->reloc_count == 0)
+ continue;
+
+ /* We always cache the relocs. Perhaps, if info->keep_memory is
+ FALSE, we should free them, if we are permitted to. */
+
+ internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE);
+ if (internal_relocs == NULL)
+ goto error_return;
+
+ ocontents = NULL;
+ irelscanend = internal_relocs + o->reloc_count;
+ for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++)
+ {
+ if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32)
+ {
+ isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
+
+ /* Look at the reloc only if the value has been resolved. */
+ if (isym->st_shndx == shndx
+ && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
+ {
+ if (ocontents == NULL)
+ {
+ if (elf_section_data (o)->this_hdr.contents != NULL)
+ ocontents = elf_section_data (o)->this_hdr.contents;
+ else
+ {
+ /* We always cache the section contents.
+ Perhaps, if info->keep_memory is FALSE, we
+ should free them, if we are permitted to. */
+ if (o->rawsize == 0)
+ o->rawsize = o->size;
+ ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
+ if (ocontents == NULL)
+ goto error_return;
+ if (!bfd_get_section_contents (abfd, o, ocontents,
+ (file_ptr) 0,
+ o->rawsize))
+ goto error_return;
+ elf_section_data (o)->this_hdr.contents = ocontents;
+ }
+
+ }
+ irelscan->r_addend -= calc_fixup (irelscan->r_addend, sec);
+ }
+ else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM)
+ {
+ isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
+
+ /* Look at the reloc only if the value has been resolved. */
+ if (ocontents == NULL)
+ {
+ if (elf_section_data (o)->this_hdr.contents != NULL)
+ ocontents = elf_section_data (o)->this_hdr.contents;
+ else
+ {
+ /* We always cache the section contents.
+ Perhaps, if info->keep_memory is FALSE, we
+ should free them, if we are permitted to. */
+
+ if (o->rawsize == 0)
+ o->rawsize = o->size;
+ ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
+ if (ocontents == NULL)
+ goto error_return;
+ if (!bfd_get_section_contents (abfd, o, ocontents,
+ (file_ptr) 0,
+ o->rawsize))
+ goto error_return;
+ elf_section_data (o)->this_hdr.contents = ocontents;
+ }
+ }
+ irelscan->r_addend -= calc_fixup (irel->r_addend
+ + isym->st_value,
+ sec);
+ }
+ }
+ else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO)
+ || (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO))
+ {
+ isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
+
+ /* Look at the reloc only if the value has been resolved. */
+ if (isym->st_shndx == shndx
+ && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
+ {
+ bfd_vma immediate;
+ bfd_vma target_address;
+
+ if (ocontents == NULL)
+ {
+ if (elf_section_data (o)->this_hdr.contents != NULL)
+ ocontents = elf_section_data (o)->this_hdr.contents;
+ else
+ {
+ /* We always cache the section contents.
+ Perhaps, if info->keep_memory is FALSE, we
+ should free them, if we are permitted to. */
+ if (o->rawsize == 0)
+ o->rawsize = o->size;
+ ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
+ if (ocontents == NULL)
+ goto error_return;
+ if (!bfd_get_section_contents (abfd, o, ocontents,
+ (file_ptr) 0,
+ o->rawsize))
+ goto error_return;
+ elf_section_data (o)->this_hdr.contents = ocontents;
+ }
+ }
+
+ immediate = (unsigned short) bfd_get_16 (abfd, ocontents +
+ irelscan->r_offset + 2);
+ target_address = immediate;
+ offset = calc_fixup (target_address, sec);
+ immediate -= offset;
+ irelscan->r_addend -= offset;
+ bfd_put_16 (abfd, immediate, ocontents + irelscan->r_offset + 2);
+ }
+ }
+
+ if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64)
+ {
+ isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
+
+ /* Look at the reloc only if the value has been resolved. */
+ if (isym->st_shndx == shndx
+ && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
+ {
+ bfd_vma immediate;
+
+ if (ocontents == NULL)
+ {
+ if (elf_section_data (o)->this_hdr.contents != NULL)
+ ocontents = elf_section_data (o)->this_hdr.contents;
+ else
+ {
+ /* We always cache the section contents.
+ Perhaps, if info->keep_memory is FALSE, we
+ should free them, if we are permitted to. */
+
+ if (o->rawsize == 0)
+ o->rawsize = o->size;
+ ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
+ if (ocontents == NULL)
+ goto error_return;
+ if (!bfd_get_section_contents (abfd, o, ocontents,
+ (file_ptr) 0,
+ o->rawsize))
+ goto error_return;
+ elf_section_data (o)->this_hdr.contents = ocontents;
+ }
+ }
+ immediate = (unsigned short) (bfd_get_16 (abfd, ocontents
+ + irelscan->r_offset
+ + 2) << 16)
+ & 0xffff0000;
+ immediate += (unsigned short) (bfd_get_16 (abfd, ocontents
+ + irelscan->r_offset
+ + INST_WORD_SIZE + 2))
+ & 0x0000ffff;
+
+ offset = calc_fixup (irelscan->r_addend, sec);
+ immediate -= offset;
+ irelscan->r_addend -= offset;
+ }
+ }
+ else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL)
+ {
+ isym = isymbuf + ELF32_R_SYM (irelscan->r_info);
+
+ /* Look at the reloc only if the value has been resolved. */
+ if (isym->st_shndx == shndx
+ && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION))
+ {
+ bfd_vma immediate;
+ bfd_vma target_address;
+
+ if (ocontents == NULL)
+ {
+ if (elf_section_data (o)->this_hdr.contents != NULL)
+ ocontents = elf_section_data (o)->this_hdr.contents;
+ else
+ {
+ /* We always cache the section contents.
+ Perhaps, if info->keep_memory is FALSE, we
+ should free them, if we are permitted to. */
+ if (o->rawsize == 0)
+ o->rawsize = o->size;
+ ocontents = (bfd_byte *) bfd_malloc (o->rawsize);
+ if (ocontents == NULL)
+ goto error_return;
+ if (!bfd_get_section_contents (abfd, o, ocontents,
+ (file_ptr) 0,
+ o->rawsize))
+ goto error_return;
+ elf_section_data (o)->this_hdr.contents = ocontents;
+ }
+ }
+
+ immediate = (unsigned short)
+ (bfd_get_16 (abfd, ocontents + irelscan->r_offset + 2) << 16)
+ & 0xffff0000;
+ immediate += (unsigned short)
+ (bfd_get_16 (abfd, ocontents + irelscan->r_offset
+ + INST_WORD_SIZE + 2))
+ & 0x0000ffff;
+ target_address = immediate;
+ offset = calc_fixup (target_address, sec);
+ immediate -= offset;
+ irelscan->r_addend -= offset;
+ bfd_put_16 (abfd, ((immediate >> 16) & 0x0000ffff),
+ ocontents + irelscan->r_offset + 2);
+ bfd_put_16 (abfd, (immediate & 0x0000ffff),
+ ocontents + irelscan->r_offset + INST_WORD_SIZE + 2);
+ }
+ }
+ }
+ }
+
+ /* Adjust the local symbols defined in this section. */
+ isymend = isymbuf + symtab_hdr->sh_info;
+ for (isym = isymbuf; isym < isymend; isym++)
+ {
+ if (isym->st_shndx == shndx)
+ isym->st_value =- calc_fixup (isym->st_value, sec);
+ }
+
+ /* Now adjust the global symbols defined in this section. */
+ isym = isymbuf + symtab_hdr->sh_info;
+ isymend = isymbuf + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
+ for (index = 0; isym < isymend; isym++, index++)
+ {
+ sym_hash = elf_sym_hashes (abfd)[index];
+ if (isym->st_shndx == shndx
+ && (sym_hash->root.type == bfd_link_hash_defined
+ || sym_hash->root.type == bfd_link_hash_defweak)
+ && sym_hash->root.u.def.section == sec)
+ {
+ sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value,
+ sec);
+ }
+ }
+
+ /* Physically move the code and change the cooked size. */
+ dest = sec->relax[0].addr;
+ for (i = 0; i < sec->relax_count; i++)
+ {
+ int len;
+ src = sec->relax[i].addr + sec->relax[i].size;
+ len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size;
+
+ memmove (contents + dest, contents + src, len);
+ sec->size -= sec->relax[i].size;
+ dest += len;
+ }
+
+ elf_section_data (sec)->relocs = internal_relocs;
+ free_relocs = NULL;
+
+ elf_section_data (sec)->this_hdr.contents = contents;
+ free_contents = NULL;
+
+ symtab_hdr->contents = (bfd_byte *) isymbuf;
+ }
+
+ if (free_relocs != NULL)
+ {
+ free (free_relocs);
+ free_relocs = NULL;
+ }
+
+ if (free_contents != NULL)
+ {
+ if (!link_info->keep_memory)
+ free (free_contents);
+ else
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = contents;
+ free_contents = NULL;
+ }
+
+ if (sec->relax_count == 0)
+ {
+ free (sec->relax);
+ sec->relax = NULL;
+ }
+ return TRUE;
+
+ error_return:
+ if (free_relocs != NULL)
+ free (free_relocs);
+ if (free_contents != NULL)
+ free (free_contents);
+ if (sec->relax != NULL)
+ {
+ free (sec->relax);
+ sec->relax = NULL;
+ sec->relax_count = 0;
+ }
+ return FALSE;
+}
+
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+microblaze_elf_gc_mark_hook (asection *sec,
+ struct bfd_link_info * info ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela * rel,
+ struct elf_link_hash_entry * h,
+ Elf_Internal_Sym * sym)
+{
+ if (h != NULL)
+ {
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_MICROBLAZE_GNU_VTINHERIT:
+ case R_MICROBLAZE_GNU_VTENTRY:
+ break;
+
+ default:
+ switch (h->root.type)
+ {
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ return h->root.u.def.section;
+
+ case bfd_link_hash_common:
+ return h->root.u.c.p->section;
+
+ default:
+ break;
+ }
+ }
+ }
+ else
+ return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
+
+ return NULL;
+}
+
+/* Update the got entry reference counts for the section being removed. */
+
+static bfd_boolean
+microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info * info ATTRIBUTE_UNUSED,
+ asection * sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
+{
+ return TRUE;
+}
+
+/* PIC support. */
+
+#define PLT_ENTRY_SIZE 16
+
+#define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */
+#define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */
+#define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */
+#define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */
+#define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */
+
+/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
+ shortcuts to them in our hash table. */
+
+static bfd_boolean
+create_got_section (bfd *dynobj, struct bfd_link_info *info)
+{
+ struct elf32_mb_link_hash_table *htab;
+
+ if (! _bfd_elf_create_got_section (dynobj, info))
+ return FALSE;
+ htab = elf32_mb_hash_table (info);
+ htab->sgot = bfd_get_section_by_name (dynobj, ".got");
+ htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
+ if (!htab->sgot || !htab->sgotplt)
+ return FALSE;
+
+ htab->srelgot = bfd_make_section (dynobj, ".rela.got");
+ if (htab->srelgot == NULL
+ || ! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | SEC_READONLY)
+ || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
+ return FALSE;
+ return TRUE;
+}
+
+/* Look through the relocs for a section during the first phase. */
+
+static bfd_boolean
+microblaze_elf_check_relocs (bfd * abfd,
+ struct bfd_link_info * info,
+ asection * sec,
+ const Elf_Internal_Rela * relocs)
+{
+ Elf_Internal_Shdr * symtab_hdr;
+ struct elf_link_hash_entry ** sym_hashes;
+ struct elf_link_hash_entry ** sym_hashes_end;
+ const Elf_Internal_Rela * rel;
+ const Elf_Internal_Rela * rel_end;
+ struct elf32_mb_link_hash_table *htab;
+ bfd_vma *local_got_offsets;
+ asection *sreloc = NULL;
+
+ if (info->relocatable)
+ return TRUE;
+
+ htab = elf32_mb_hash_table (info);
+ local_got_offsets = elf_local_got_offsets (abfd);
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
+ if (!elf_bad_symtab (abfd))
+ sym_hashes_end -= symtab_hdr->sh_info;
+
+ rel_end = relocs + sec->reloc_count;
+
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ unsigned int r_type;
+ struct elf_link_hash_entry * h;
+ unsigned long r_symndx;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ r_type = ELF32_R_TYPE (rel->r_info);
+
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ h = sym_hashes [r_symndx - symtab_hdr->sh_info];
+
+ switch (r_type)
+ {
+ /* This relocation describes the C++ object vtable hierarchy.
+ Reconstruct it for later use during GC. */
+ case R_MICROBLAZE_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_MICROBLAZE_GNU_VTENTRY:
+ if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+ return FALSE;
+ break;
+
+ /* This relocation requires .plt entry. */
+ case R_MICROBLAZE_PLT_64:
+ if (h != NULL)
+ {
+ h->needs_plt = 1;
+ h->plt.refcount += 1;
+ }
+ break;
+
+ /* This relocation requires .got entry. */
+ case R_MICROBLAZE_GOT_64:
+ if (htab->sgot == NULL)
+ {
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ if (!create_got_section (htab->elf.dynobj, info))
+ return FALSE;
+ }
+ if (h != NULL)
+ {
+ h->got.refcount += 1;
+ }
+ else
+ {
+ bfd_signed_vma *local_got_refcounts;
+
+ /* This is a global offset table entry for a local symbol. */
+ local_got_refcounts = elf_local_got_refcounts (abfd);
+ if (local_got_refcounts == NULL)
+ {
+ bfd_size_type size;
+
+ size = symtab_hdr->sh_info;
+ size *= sizeof (bfd_signed_vma);
+ local_got_refcounts = bfd_zalloc (abfd, size);
+ if (local_got_refcounts == NULL)
+ return FALSE;
+ elf_local_got_refcounts (abfd) = local_got_refcounts;
+ }
+ local_got_refcounts[r_symndx] += 1;
+ }
+ break;
+
+ case R_MICROBLAZE_64:
+ case R_MICROBLAZE_64_PCREL:
+ case R_MICROBLAZE_32:
+ {
+ if (h != NULL && !info->shared)
+ {
+ /* we may need a copy reloc. */
+ h->non_got_ref = 1;
+
+ /* we may also need a .plt entry. */
+ h->plt.refcount += 1;
+ if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL)
+ h->pointer_equality_needed = 1;
+ }
+
+
+ /* If we are creating a shared library, and this is a reloc
+ against a global symbol, or a non PC relative reloc
+ against a local symbol, then we need to copy the reloc
+ into the shared library. However, if we are linking with
+ -Bsymbolic, we do not need to copy a reloc against a
+ global symbol which is defined in an object we are
+ including in the link (i.e., DEF_REGULAR is set). At
+ this point we have not seen all the input files, so it is
+ possible that DEF_REGULAR is not set now but will be set
+ later (it is never cleared). In case of a weak definition,
+ DEF_REGULAR may be cleared later by a strong definition in
+ a shared library. We account for that possibility below by
+ storing information in the relocs_copied field of the hash
+ table entry. A similar situation occurs when creating
+ shared libraries and symbol visibility changes render the
+ symbol local.
+
+ If on the other hand, we are creating an executable, we
+ may need to keep relocations for symbols satisfied by a
+ dynamic library if we manage to avoid copy relocs for the
+ symbol. */
+
+ if ((info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && (r_type != R_MICROBLAZE_64_PCREL
+ || (h != NULL
+ && (! info->symbolic
+ || h->root.type == bfd_link_hash_defweak
+ || !h->def_regular))))
+ || (!info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && h != NULL
+ && (h->root.type == bfd_link_hash_defweak
+ || !h->def_regular)))
+ {
+ struct elf32_mb_dyn_relocs *p;
+ struct elf32_mb_dyn_relocs **head;
+
+ /* When creating a shared object, we must copy these
+ relocs into the output file. We create a reloc
+ section in dynobj and make room for the reloc. */
+
+ if (sreloc == NULL)
+ {
+ const char *name;
+ bfd *dynobj;
+ unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
+ unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
+
+ name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
+ if (name == NULL)
+ return FALSE;
+
+ if (strncmp (name, ".rela", 5) != 0
+ || strcmp (bfd_get_section_name (abfd, sec),
+ name + 5) != 0)
+ {
+ (*_bfd_error_handler)
+ (_("%B: bad relocation section name `%s\'"),
+ abfd, name);
+ }
+
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ dynobj = htab->elf.dynobj;
+
+ sreloc = bfd_get_section_by_name (dynobj, name);
+ if (sreloc == NULL)
+ {
+ flagword flags;
+
+ sreloc = bfd_make_section (dynobj, name);
+ flags = (SEC_HAS_CONTENTS | SEC_READONLY
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ if ((sec->flags & SEC_ALLOC) != 0)
+ flags |= SEC_ALLOC | SEC_LOAD;
+ if (sreloc == NULL
+ || ! bfd_set_section_flags (dynobj, sreloc, flags)
+ || ! bfd_set_section_alignment (dynobj, sreloc, 2))
+ return FALSE;
+ }
+ elf_section_data (sec)->sreloc = sreloc;
+ }
+
+ /* If this is a global symbol, we count the number of
+ relocations we need for this symbol. */
+ if (h != NULL)
+ head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs;
+ else
+ {
+ /* Track dynamic relocs needed for local syms too.
+ We really need local syms available to do this
+ easily. Oh well. */
+
+ asection *s;
+ Elf_Internal_Sym *isym;
+ void *vpp;
+
+ isym = bfd_sym_from_r_symndx (&htab->sym_sec,
+ abfd, r_symndx);
+ if (isym == NULL)
+ return FALSE;
+
+ s = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ if (s == NULL)
+ return FALSE;
+
+ vpp = &elf_section_data (s)->local_dynrel;
+ head = (struct elf32_mb_dyn_relocs **) vpp;
+ }
+
+ p = *head;
+ if (p == NULL || p->sec != sec)
+ {
+ bfd_size_type amt = sizeof *p;
+ p = ((struct elf32_mb_dyn_relocs *)
+ bfd_alloc (htab->elf.dynobj, amt));
+ if (p == NULL)
+ return FALSE;
+ p->next = *head;
+ *head = p;
+ p->sec = sec;
+ p->count = 0;
+ p->pc_count = 0;
+ }
+
+ p->count += 1;
+ if (r_type == R_MICROBLAZE_64_PCREL)
+ p->pc_count += 1;
+ }
+ }
+ break;
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+microblaze_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
+{
+ struct elf32_mb_link_hash_table *htab;
+
+ htab = elf32_mb_hash_table (info);
+ if (!htab->sgot && !create_got_section (dynobj, info))
+ return FALSE;
+
+ if (!_bfd_elf_create_dynamic_sections (dynobj, info))
+ return FALSE;
+
+ htab->splt = bfd_get_section_by_name (dynobj, ".plt");
+ htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
+ htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
+ if (!info->shared)
+ htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
+
+ if (!htab->splt || !htab->srelplt || !htab->sdynbss
+ || (!info->shared && !htab->srelbss))
+ abort ();
+
+ return TRUE;
+}
+
+/* Copy the extra info we tack onto an elf_link_hash_entry. */
+
+static void
+microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
+{
+ struct elf32_mb_link_hash_entry *edir, *eind;
+
+ edir = (struct elf32_mb_link_hash_entry *) dir;
+ eind = (struct elf32_mb_link_hash_entry *) ind;
+
+ if (eind->dyn_relocs != NULL)
+ {
+ if (edir->dyn_relocs != NULL)
+ {
+ struct elf32_mb_dyn_relocs **pp;
+ struct elf32_mb_dyn_relocs *p;
+
+ if (ind->root.type == bfd_link_hash_indirect)
+ abort ();
+
+ /* Add reloc counts against the weak sym to the strong sym
+ list. Merge any entries against the same section. */
+ for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
+ {
+ struct elf32_mb_dyn_relocs *q;
+
+ for (q = edir->dyn_relocs; q != NULL; q = q->next)
+ if (q->sec == p->sec)
+ {
+ q->pc_count += p->pc_count;
+ q->count += p->count;
+ *pp = p->next;
+ break;
+ }
+ if (q == NULL)
+ pp = &p->next;
+ }
+ *pp = edir->dyn_relocs;
+ }
+
+ edir->dyn_relocs = eind->dyn_relocs;
+ eind->dyn_relocs = NULL;
+ }
+
+ _bfd_elf_link_hash_copy_indirect (info, dir, ind);
+}
+
+static bfd_boolean
+microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
+{
+ struct elf32_mb_link_hash_table *htab;
+ struct elf32_mb_link_hash_entry * eh;
+ struct elf32_mb_dyn_relocs *p;
+ asection *sdynbss, *s;
+ unsigned int power_of_two;
+ bfd *dynobj;
+
+ htab = elf32_mb_hash_table (info);
+
+ /* If this is a function, put it in the procedure linkage table. We
+ will fill in the contents of the procedure linkage table later,
+ when we know the address of the .got section. */
+ if (h->type == STT_FUNC
+ || h->needs_plt)
+ {
+ if (h->plt.refcount <= 0
+ || SYMBOL_CALLS_LOCAL (info, h)
+ || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak))
+ {
+ /* This case can occur if we saw a PLT reloc in an input
+ file, but the symbol was never referred to by a dynamic
+ object, or if all references were garbage collected. In
+ such a case, we don't actually need to build a procedure
+ linkage table, and we can just do a PC32 reloc instead. */
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+
+ return TRUE;
+ }
+ else
+ /* It's possible that we incorrectly decided a .plt reloc was
+ needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in
+ check_relocs. We can't decide accurately between function and
+ non-function syms in check-relocs; Objects loaded later in
+ the link may change h->type. So fix it now. */
+ h->plt.offset = (bfd_vma) -1;
+
+ /* If this is a weak symbol, and there is a real definition, the
+ processor independent code will have arranged for us to see the
+ real definition first, and we can just use the same value. */
+ if (h->u.weakdef != NULL)
+ {
+ BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
+ || h->u.weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->u.weakdef->root.u.def.section;
+ h->root.u.def.value = h->u.weakdef->root.u.def.value;
+ return TRUE;
+ }
+
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. */
+
+ /* If we are creating a shared library, we must presume that the
+ only references to the symbol are via the global offset table.
+ For such cases we need not do anything here; the relocations will
+ be handled correctly by relocate_section. */
+ if (info->shared)
+ return TRUE;
+
+ /* If there are no references to this symbol that do not use the
+ GOT, we don't need to generate a copy reloc. */
+ if (!h->non_got_ref)
+ return TRUE;
+
+ /* If -z nocopyreloc was given, we won't generate them either. */
+ if (info->nocopyreloc)
+ {
+ h->non_got_ref = 0;
+ return TRUE;
+ }
+
+ eh = (struct elf32_mb_link_hash_entry *) h;
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ s = p->sec->output_section;
+ if (s != NULL && (s->flags & SEC_READONLY) != 0)
+ break;
+ }
+
+ /* If we didn't find any dynamic relocs in read-only sections, then
+ we'll be keeping the dynamic relocs and avoiding the copy reloc. */
+ if (p == NULL)
+ {
+ h->non_got_ref = 0;
+ return TRUE;
+ }
+
+ /* We must allocate the symbol in our .dynbss section, which will
+ become part of the .bss section of the executable. There will be
+ an entry for this symbol in the .dynsym section. The dynamic
+ object will contain position independent code, so all references
+ from the dynamic object to this symbol will go through the global
+ offset table. The dynamic linker will use the .dynsym entry to
+ determine the address it must put in the global offset table, so
+ both the dynamic object and the regular object will refer to the
+ same memory location for the variable. */
+
+ /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker
+ to copy the initial value out of the dynamic object and into the
+ runtime process image. */
+ dynobj = elf_hash_table (info)->dynobj;
+ BFD_ASSERT (dynobj != NULL);
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+ {
+ htab->srelbss->size += sizeof (Elf32_External_Rela);
+ h->needs_copy = 1;
+ }
+
+ /* We need to figure out the alignment required for this symbol. I
+ have no idea how ELF linkers handle this. */
+ power_of_two = bfd_log2 (h->size);
+ if (power_of_two > 3)
+ power_of_two = 3;
+
+ sdynbss = htab->sdynbss;
+ /* Apply the required alignment. */
+ sdynbss->size = BFD_ALIGN (sdynbss->size, (bfd_size_type) (1 << power_of_two));
+ if (power_of_two > bfd_get_section_alignment (dynobj, sdynbss))
+ {
+ if (! bfd_set_section_alignment (dynobj, sdynbss, power_of_two))
+ return FALSE;
+ }
+
+ /* Define the symbol as being at this point in the section. */
+ h->root.u.def.section = sdynbss;
+ h->root.u.def.value = sdynbss->size;
+
+ /* Increment the section size to make room for the symbol. */
+ sdynbss->size += h->size;
+ return TRUE;
+}
+
+/* Allocate space in .plt, .got and associated reloc sections for
+ dynamic relocs. */
+
+static bfd_boolean
+allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat)
+{
+ struct bfd_link_info *info;
+ struct elf32_mb_link_hash_table *htab;
+ struct elf32_mb_link_hash_entry *eh;
+ struct elf32_mb_dyn_relocs *p;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ /* When warning symbols are created, they **replace** the "real"
+ entry in the hash table, thus we never get to see the real
+ symbol in a hash traversal. So look at it now. */
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ info = (struct bfd_link_info *) dat;
+ htab = elf32_mb_hash_table (info);
+
+ if (htab->elf.dynamic_sections_created
+ && h->plt.refcount > 0)
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
+ {
+ asection *s = htab->splt;
+
+ /* The first entry in .plt is reserved. */
+ if (s->size == 0)
+ s->size = PLT_ENTRY_SIZE;
+
+ h->plt.offset = s->size;
+
+ /* If this symbol is not defined in a regular file, and we are
+ not generating a shared library, then set the symbol to this
+ location in the .plt. This is required to make function
+ pointers compare as equal between the normal executable and
+ the shared library. */
+ if (! info->shared
+ && !h->def_regular)
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = h->plt.offset;
+ }
+
+ /* Make room for this entry. */
+ s->size += PLT_ENTRY_SIZE;
+
+ /* We also need to make an entry in the .got.plt section, which
+ will be placed in the .got section by the linker script. */
+ htab->sgotplt->size += 4;
+
+ /* We also need to make an entry in the .rel.plt section. */
+ htab->srelplt->size += sizeof (Elf32_External_Rela);
+ }
+ else
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+ }
+ else
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+
+ if (h->got.refcount > 0)
+ {
+ asection *s;
+
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ s = htab->sgot;
+ h->got.offset = s->size;
+ s->size += 4;
+ htab->srelgot->size += sizeof (Elf32_External_Rela);
+ }
+ else
+ h->got.offset = (bfd_vma) -1;
+
+ eh = (struct elf32_mb_link_hash_entry *) h;
+ if (eh->dyn_relocs == NULL)
+ return TRUE;
+
+ /* In the shared -Bsymbolic case, discard space allocated for
+ dynamic pc-relative relocs against symbols which turn out to be
+ defined in regular objects. For the normal shared case, discard
+ space for pc-relative relocs that have become local due to symbol
+ visibility changes. */
+
+ if (info->shared)
+ {
+ if (h->def_regular
+ && (h->forced_local
+ || info->symbolic))
+ {
+ struct elf32_mb_dyn_relocs **pp;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ p->count -= p->pc_count;
+ p->pc_count = 0;
+ if (p->count == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+ }
+ }
+ else
+ {
+ /* For the non-shared case, discard space for relocs against
+ symbols which turn out to need copy relocs or are not
+ dynamic. */
+
+ if (!h->non_got_ref
+ && ((h->def_dynamic
+ && !h->def_regular)
+ || (htab->elf.dynamic_sections_created
+ && (h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_undefined))))
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ /* If that succeeded, we know we'll be keeping all the
+ relocs. */
+ if (h->dynindx != -1)
+ goto keep;
+ }
+
+ eh->dyn_relocs = NULL;
+
+ keep: ;
+ }
+
+ /* Finally, allocate space. */
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ asection *sreloc = elf_section_data (p->sec)->sreloc;
+ sreloc->size += p->count * sizeof (Elf32_External_Rela);
+ }
+
+ return TRUE;
+}
+
+/* Set the sizes of the dynamic sections. */
+
+static bfd_boolean
+microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ struct elf32_mb_link_hash_table *htab;
+ bfd *dynobj;
+ asection *s;
+ bfd *ibfd;
+
+ htab = elf32_mb_hash_table (info);
+ dynobj = htab->elf.dynobj;
+ BFD_ASSERT (dynobj != NULL);
+
+ /* Set up .got offsets for local syms, and space for local dynamic
+ relocs. */
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ bfd_signed_vma *local_got;
+ bfd_signed_vma *end_local_got;
+ bfd_size_type locsymcount;
+ Elf_Internal_Shdr *symtab_hdr;
+ asection *srel;
+
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
+ continue;
+
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ {
+ struct elf32_mb_dyn_relocs *p;
+
+ for (p = ((struct elf32_mb_dyn_relocs *)
+ elf_section_data (s)->local_dynrel);
+ p != NULL;
+ p = p->next)
+ {
+ if (!bfd_is_abs_section (p->sec)
+ && bfd_is_abs_section (p->sec->output_section))
+ {
+ /* Input section has been discarded, either because
+ it is a copy of a linkonce section or due to
+ linker script /DISCARD/, so we'll be discarding
+ the relocs too. */
+ }
+ else if (p->count != 0)
+ {
+ srel = elf_section_data (p->sec)->sreloc;
+ srel->size += p->count * sizeof (Elf32_External_Rela);
+ if ((p->sec->output_section->flags & SEC_READONLY) != 0)
+ info->flags |= DF_TEXTREL;
+ }
+ }
+ }
+
+ local_got = elf_local_got_refcounts (ibfd);
+ if (!local_got)
+ continue;
+
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ locsymcount = symtab_hdr->sh_info;
+ end_local_got = local_got + locsymcount;
+ s = htab->sgot;
+ srel = htab->srelgot;
+
+ for (; local_got < end_local_got; ++local_got)
+ {
+ if (*local_got > 0)
+ {
+ *local_got = s->size;
+ s->size += 4;
+ if (info->shared)
+ srel->size += sizeof (Elf32_External_Rela);
+ }
+ else
+ *local_got = (bfd_vma) -1;
+ }
+ }
+
+ /* Allocate global sym .plt and .got entries, and space for global
+ sym dynamic relocs. */
+ elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* Make space for the trailing nop in .plt. */
+ if (htab->splt->size > 0)
+ htab->splt->size += 4;
+ }
+
+ /* The check_relocs and adjust_dynamic_symbol entry points have
+ determined the sizes of the various dynamic sections. Allocate
+ memory for them. */
+ for (s = dynobj->sections; s != NULL; s = s->next)
+ {
+ const char *name;
+ bfd_boolean strip = FALSE;
+
+ 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);
+
+ if (strncmp (name, ".rela", 5) == 0)
+ {
+ if (s->size == 0)
+ {
+ /* If we don't need this section, strip it from the
+ output file. This is to handle .rela.bss and
+ .rela.plt. We must create it in
+ create_dynamic_sections, because it must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ strip = TRUE;
+ }
+ else
+ {
+ /* 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 (s != htab->splt && s != htab->sgot && s != htab->sgotplt)
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (strip)
+ {
+ s->flags |= SEC_EXCLUDE;
+ continue;
+ }
+
+ /* Allocate memory for the section contents. */
+ /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
+ Unused entries should be reclaimed before the section's contents
+ are written out, but at the moment this does not happen. Thus in
+ order to prevent writing out garbage, we initialise the section's
+ contents to zero. */
+ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
+ if (s->contents == NULL && s->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 microblaze_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. */
+#define add_dynamic_entry(TAG, VAL) \
+ _bfd_elf_add_dynamic_entry (info, TAG, VAL)
+
+ if (info->executable)
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return FALSE;
+ }
+
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
+ return FALSE;
+
+ if (htab->splt->size != 0)
+ {
+ if (!add_dynamic_entry (DT_PLTGOT, 0)
+ || !add_dynamic_entry (DT_PLTRELSZ, 0)
+ || !add_dynamic_entry (DT_PLTREL, DT_RELA)
+ || !add_dynamic_entry (DT_JMPREL, 0)
+ || !add_dynamic_entry (DT_BIND_NOW, 1))
+ return FALSE;
+ }
+
+ if (info->flags & DF_TEXTREL)
+ {
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return FALSE;
+ }
+ }
+#undef add_dynamic_entry
+ return TRUE;
+}
+
+/* Finish up dynamic symbol handling. We set the contents of various
+ dynamic sections here. */
+
+static bfd_boolean
+microblaze_elf_finish_dynamic_symbol (bfd *output_bfd,
+ struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
+{
+ bfd *dynobj;
+ struct elf32_mb_link_hash_table *htab;
+
+ htab = elf32_mb_hash_table (info);
+ dynobj = htab->elf.dynobj;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ asection *splt;
+ asection *srela;
+ asection *sgotplt;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+ bfd_vma plt_index;
+ bfd_vma got_offset;
+ bfd_vma got_addr;
+
+ /* This symbol has an entry in the procedure linkage table. Set
+ it up. */
+ BFD_ASSERT (h->dynindx != -1);
+
+ splt = htab->splt;
+ srela = htab->srelplt;
+ sgotplt = htab->sgotplt;
+ BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL);
+
+ plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */
+ got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */
+ got_addr = got_offset;
+
+ /* For non-PIC objects we need absolute address of the GOT entry. */
+ if (!info->shared)
+ got_addr += htab->sgotplt->output_section->vma + sgotplt->output_offset;
+
+ /* Fill in the entry in the procedure linkage table. */
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff),
+ splt->contents + h->plt.offset);
+ if (info->shared)
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff),
+ splt->contents + h->plt.offset + 4);
+ else
+ bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff),
+ splt->contents + h->plt.offset + 4);
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2,
+ splt->contents + h->plt.offset + 8);
+ bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3,
+ splt->contents + h->plt.offset + 12);
+
+ /* Any additions to the .got section??? */
+ /* bfd_put_32 (output_bfd,
+ splt->output_section->vma + splt->output_offset + h->plt.offset + 4,
+ sgotplt->contents + got_offset); */
+
+ /* Fill in the entry in the .rela.plt section. */
+ rela.r_offset = (sgotplt->output_section->vma
+ + sgotplt->output_offset
+ + got_offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT);
+ rela.r_addend = 0;
+ loc = srela->contents;
+ loc += plt_index * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+
+ if (!h->def_regular)
+ {
+ /* Mark the symbol as undefined, rather than as defined in
+ the .plt section. Zero the value. */
+ sym->st_shndx = SHN_UNDEF;
+ sym->st_value = 0;
+ }
+ }
+
+ if (h->got.offset != (bfd_vma) -1)
+ {
+ asection *sgot;
+ asection *srela;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+
+ /* This symbol has an entry in the global offset table. Set it
+ up. */
+
+ sgot = htab->sgot;
+ srela = htab->srelgot;
+ BFD_ASSERT (sgot != NULL && srela != NULL);
+
+ rela.r_offset = (sgot->output_section->vma
+ + sgot->output_offset
+ + (h->got.offset &~ (bfd_vma) 1));
+
+ /* If this is a -Bsymbolic link, and the symbol is defined
+ locally, we just want to emit a RELATIVE reloc. Likewise if
+ the symbol was forced to be local because of a version file.
+ The entry in the global offset table will already have been
+ initialized in the relocate_section function. */
+ if (info->shared
+ && (info->symbolic || h->dynindx == -1)
+ && h->def_regular)
+ {
+ asection *sec = h->root.u.def.section;
+ rela.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL);
+ rela.r_addend = (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+ else
+ {
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_GLOB_DAT);
+ rela.r_addend = 0;
+ }
+
+ bfd_put_32 (output_bfd, (bfd_vma) 0,
+ sgot->contents + (h->got.offset &~ (bfd_vma) 1));
+ loc = srela->contents;
+ loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ }
+
+ if (h->needs_copy)
+ {
+ asection *s;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+
+ /* This symbols needs a copy reloc. Set it up. */
+
+ BFD_ASSERT (h->dynindx != -1);
+
+ s = bfd_get_section_by_name (h->root.u.def.section->owner,
+ ".rela.bss");
+ BFD_ASSERT (s != NULL);
+
+ rela.r_offset = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY);
+ rela.r_addend = 0;
+ loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ }
+
+ /* Mark some specially defined symbols as absolute. */
+ if (strcmp (h->root.root.string, "_DYNAMIC") == 0
+ || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
+ || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
+ sym->st_shndx = SHN_ABS;
+
+ return TRUE;
+}
+
+
+/* Finish up the dynamic sections. */
+
+static bfd_boolean
+microblaze_elf_finish_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *sdyn, *sgot;
+ struct elf32_mb_link_hash_table *htab;
+
+ htab = elf32_mb_hash_table (info);
+ dynobj = htab->elf.dynobj;
+
+ sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+
+ if (htab->elf.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->size);
+ for (; dyncon < dynconend; dyncon++)
+ {
+ Elf_Internal_Dyn dyn;
+ const char *name;
+ bfd_boolean size;
+
+ bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
+ {
+ case DT_PLTGOT: name = ".got.plt"; size = FALSE; break;
+ case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
+ case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
+ case DT_RELA: name = ".rela.dyn"; size = FALSE; break;
+ case DT_RELASZ: name = ".rela.dyn"; size = TRUE; 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
+ dyn.d_un.d_val = s->size;
+ }
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ }
+ }
+
+ /* Clear the first entry in the procedure linkage table,
+ and put a nop in the last four bytes. */
+ if (splt->size > 0)
+ {
+ memset (splt->contents, 0, PLT_ENTRY_SIZE);
+ bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */,
+ splt->contents + splt->size - 4);
+ }
+
+ elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
+ }
+
+ /* Set the first entry in the global offset table to the address of
+ the dynamic section. */
+ sgot = bfd_get_section_by_name (dynobj, ".got.plt");
+ if (sgot && sgot->size > 0)
+ {
+ if (sdyn == NULL)
+ bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
+ else
+ bfd_put_32 (output_bfd,
+ sdyn->output_section->vma + sdyn->output_offset,
+ sgot->contents);
+ elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+ }
+
+ if (htab->sgot && htab->sgot->size > 0)
+ elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
+
+ return TRUE;
+}
+
+/* Hook called by the linker routine which adds symbols from an object
+ file. We use it to put .comm items in .sbss, and not .bss. */
+
+static bfd_boolean
+microblaze_elf_add_symbol_hook (bfd *abfd,
+ struct bfd_link_info *info,
+ Elf_Internal_Sym *sym,
+ const char **namep ATTRIBUTE_UNUSED,
+ flagword *flagsp ATTRIBUTE_UNUSED,
+ asection **secp,
+ bfd_vma *valp)
+{
+ if (sym->st_shndx == SHN_COMMON
+ && !info->relocatable
+ && sym->st_size <= elf_gp_size (abfd))
+ {
+ /* Common symbols less than or equal to -G nn bytes are automatically
+ put into .sbss. */
+ *secp = bfd_make_section_anyway (abfd, ".sbss");
+ if (*secp == NULL
+ || ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON))
+ return FALSE;
+
+ *valp = sym->st_size;
+ }
+
+ return TRUE;
+}
+
+
+#define TARGET_BIG_SYM bfd_elf32_microblaze_vec
+#define TARGET_BIG_NAME "elf32-microblaze"
+
+#define ELF_ARCH bfd_arch_microblaze
+#define ELF_MACHINE_CODE EM_MICROBLAZE
+#define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD
+#define ELF_MAXPAGESIZE 0x4 /* 4k, if we ever have 'em. */
+#define elf_info_to_howto microblaze_elf_info_to_howto
+#define elf_info_to_howto_rel NULL
+
+#define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup
+#define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name
+#define elf_backend_relocate_section microblaze_elf_relocate_section
+#define bfd_elf32_bfd_relax_section microblaze_elf_relax_section
+#define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup
+
+#define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook
+#define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook
+#define elf_backend_check_relocs microblaze_elf_check_relocs
+#define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol
+#define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create
+#define elf_backend_can_gc_sections 1
+#define elf_backend_can_refcount 1
+#define elf_backend_want_got_plt 1
+#define elf_backend_plt_readonly 1
+#define elf_backend_got_header_size 12
+#define elf_backend_rela_normal 1
+
+#define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol
+#define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections
+#define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections
+#define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol
+#define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections
+#define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook
+
+#include "elf32-target.h"
projects / msp430-binutils.git / blobdiff