Add PIC and TLS support to the ARC target.

bfd/ChangeLog:
	* arc-plt.def: New file.
	* arc-plt.h: Likewise.
	* elf32-arc.c (elf_arc_abs_plt0_entry, elf_arc_abs_pltn_entry,
		       elf_arcV2_abs_plt0_entry, elf_arcV2_abs_pltn_entry,
		       elf_arc_pic_plt0_entry, elf_arc_pic_pltn_entry,
		       elf_arcV2_pic_plt0_entry, elf_arcV2_pic_pltn_entry): Remove.
	(name_for_global_symbol): Added.
	(ADD_RELA): Helper to create dynamic relocs.
	(new_got_entry_to_list): Create a new got entry in linked list.
	(symbol_has_entry_of_type): Search for specific type of entry in
	list.
	(is_reloc_for_GOT): return FALSE for any TLS related relocs.
	(is_reloc_for_TLS, arc_elf_set_private_flags)
	(arc_elf_print_private_bfd_data, arc_elf_copy_private_bfd_data)
	(arc_elf_merge_private_bfd_data): New functions.
	(debug_arc_reloc): Cleaned debug info printing.
	(PDATA reloc): Changed not to perform address alignment.
	(reverse_me): Added. Fix for ARC_32 relocs.
	(arc_do_relocation): Return bfd_reloc_of when no relocation should
	occur.
	(arc_get_local_got_ents): Renamed from arc_get_local_got_offsets.
	Changed function to access an array of list of GOT entries instead
	of just an array of offsets.
	(elf_arc_relocate_section): Added support for PIC and TLS related relocations.
	(elf_arc_check_relocs): Likewise.
	(elf_arc_adjust_dynamic_symbol, elf_arc_finish_dynamic_symbol,
	(elf_arc_finish_dynamic_sections): Likewise
	(arc_create_dynamic_sections): Modified conditions to create
	dynamic sections.
	(ADD_SYMBOL_REF_SEC_AND_RELOC): New macro.
	(plt_do_relocs_for_symbol, relocate_plt_for_symbol)
	(relocate_plt_for_entry): Changed to support new way to define PLT
	related code.
	(add_symbol_to_plt): Likewise.
	(arc_elf_link_hash_table_create): New function.

include/ChangeLog:
	* elf/arc-reloc.def (ARC_32, ARC_GOTPC, ARC_TLS_GD_GOT)
	(ARC_TLS_IE_GOT, ARC_TLS_DTPOFF, ARC_TLS_DTPOFF_S9, ARC_TLS_LE_S9)
	(ARC_TLS_LE_32): Fixed formula.
	(ARC_TLS_GD_LD): Use new special function.
	* opcode/arc-func.h: Changed all the replacement
	functions to clear the patching bits before doing an or it with the value
	argument.

1 files changed, 94 insertions, 0 deletions

diff --git a/bfd/arc-plt.def b/bfd/arc-plt.def
new file mode 100644
index 0000000..833dc20
--- /dev/null
+++ b/bfd/arc-plt.def
@@ -0,0 +1,94 @@
+/* Arc V2 Related PLT entries.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   Contributed by Cupertino Miranda (cmiranda@synopsys.com).
+
+   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.  */
+
+PLT_TYPE_START (ELF_ARCV2_PIC)
+  PLT_ENTRY (0x2730, 0x7f8b, 0x0000, 0x0000) /* ld %r11, [pcl,0] : 0 to be replaced by _DYNAMIC@GOTPC+4 */
+  PLT_ENTRY (0x2730, 0x7f8a, 0x0000, 0x0000) /* ld %r10, [pcl,0] : 0 to be replaced by _DYNAMIC@GOTPC+8 */
+  PLT_ENTRY (0x2020, 0x0280)		    /* j [%r10] */
+  PLT_ENTRY (0x0,0x0,0x0,0x0,0x0,0x0)	    /* padding */
+
+  PLT_ELEM (0x2730, 0x7f8c, 0x0000, 0x0000) /* ld %r12, [%pc,func@got] */
+  PLT_ELEM (0x2021, 0x0300)		   /* j.d [%r12] */
+  PLT_ELEM (0x240a, 0x1fc0)		   /* mov %r12, %pcl */
+
+  ENTRY_RELOC (4, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 4)
+  ENTRY_RELOC (12, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 8)
+  ENTRY_RELOC (20, 32, 0xFFFFFFFF, SGOT, 0)
+
+  ELEM_RELOC (4, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 0)
+
+PLT_TYPE_END (ELF_ARCV2_PIC)
+
+PLT_TYPE_START (ELF_ARCV2_ABS)
+  PLT_ENTRY (0x1600,0x700b,0x0000,0x0000)  /* ld %r11, [0] */
+  PLT_ENTRY (0x1600,0x700a,0x0000,0x0000)  /* ld %r10, [0] */
+  PLT_ENTRY (0x2020,0x0280)		  /* j [%r10] */
+  PLT_ENTRY (0x0,0x0,0x0,0x0,0x0,0x0)	  /* padding */
+
+  PLT_ELEM (0x2730, 0x7f8c, 0x0000, 0x0000) /* ld %r12, [%pcl,func@gotpc] */
+  PLT_ELEM (0x2021,0x0300)		   /* j.d [%r12] */
+  PLT_ELEM (0x240a,0x1fc0)		   /* mov %r12, %pcl */
+
+  ENTRY_RELOC (4, 32, 0xFFFFFFFF, SGOT | MIDDLE_ENDIAN, 4)
+  ENTRY_RELOC (12, 32, 0xFFFFFFFF, SGOT | MIDDLE_ENDIAN, 8)
+  ENTRY_RELOC (20, 32, 0xFFFFFFFF, SGOT, 0)
+
+  ELEM_RELOC (4, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 0)
+
+PLT_TYPE_END (ELF_ARCV2_ABS)
+
+
+/* Non Arc V2 Related PLT entries.  */
+
+PLT_TYPE_START (ELF_ARC_PIC) 
+  PLT_ENTRY (0x2730,0x7f8b,0x0000,0x0000) /* ld %r11, [pcl,0] : 0 to be replaced by _DYNAMIC@GOTPC+4 */
+  PLT_ENTRY (0x2730,0x7f8a,0x0000,0x0000) /* ld %r10, [pcl,0] : 0 to be replaced by -DYNAMIC@GOTPC+8  */
+  PLT_ENTRY (0x2020,0x0280)		 /* j [%r10] */
+  PLT_ENTRY (0x0,0x0)			 /* padding */
+
+  PLT_ELEM (0x2730,0x7f8c,0x0000,0x0000)  /* ld %r12, [%pc,func@got]   */
+  PLT_ELEM (0x7c20)			 /* j_s.d [%r12]	      */
+  PLT_ELEM (0x74ef)			 /* mov_s %r12, %pcl          */
+
+  ENTRY_RELOC (4, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 4)
+  ENTRY_RELOC (12, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 8)
+  ENTRY_RELOC (20, 32, 0xFFFFFFFF, SGOT, 0)
+
+  ELEM_RELOC (4, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 0)
+
+PLT_TYPE_END (ELF_ARC_PIC) 
+
+PLT_TYPE_START (ELF_ARC_ABS) 
+  PLT_ENTRY (0x1600,0x700b,0x0000,0x0000) /* ld %r11, [0] */
+  PLT_ENTRY (0x1600,0x700a,0x0000,0x0000) /* ld %r10, [0] */
+  PLT_ENTRY (0x2020,0x0280)		 /* j [%r10] */
+  PLT_ENTRY (0x0,0x0)			 /* padding */
+
+  PLT_ELEM (0x2730,0x7f8c,0x0000,0x0000) /* ld %r12, [%pc,func@gotpc] */
+  PLT_ELEM (0x7c20,0x74ef)		/* mov_s %r12, %pcl          */
+
+  ENTRY_RELOC (4, 32, 0xFFFFFFFF, SGOT | MIDDLE_ENDIAN, 4)
+  ENTRY_RELOC (12, 32, 0xFFFFFFFF, SGOT | MIDDLE_ENDIAN, 8)
+  ENTRY_RELOC (20, 32, 0xFFFFFFFF, SGOT, 0)
+
+  ELEM_RELOC (4, 32, 0xFFFFFFFF, SGOT | RELATIVE_INSN_32 | MIDDLE_ENDIAN, 0)
+
+PLT_TYPE_END (ELF_ARC_ABS)