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.

3 files changed, 37 insertions, 10 deletions

diff --git a/include/ChangeLog b/include/ChangeLog
index cd1fae3..4195e47 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,14 @@
+2016-01-18  Miranda Cupertino  <Cupertino.Miranda@synopsys.com>
+	    Zissulescu Claudiu  <Claudiu.Zissulescu@synopsys.com>
+
+	* 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.
+
 2016-01-18  Nick Clifton  <nickc@redhat.com>
 
 	PR ld/19440
diff --git a/include/elf/arc-reloc.def b/include/elf/arc-reloc.def
index 893291f..96123de 100644
--- a/include/elf/arc-reloc.def
+++ b/include/elf/arc-reloc.def
@@ -31,7 +31,7 @@ ARC_RELOC_HOWTO(ARC_32, 4, \
                 32, \
                 replace_word32, \
                 bitfield, \
-                ( S + A ))
+                (NON_ME ( S + A ) ))
 
 ARC_RELOC_HOWTO(ARC_N8, 8, \
                 0, \
@@ -360,7 +360,7 @@ ARC_RELOC_HOWTO(ARC_GOTPC, 58, \
                 32, \
                 replace_word32, \
                 signed, \
-                ( ( GOT + A ) - P ))
+                ( GOT_BEGIN - P ))
 
 ARC_RELOC_HOWTO(ARC_S21W_PCREL_PLT, 60, \
                 2, \
@@ -395,12 +395,12 @@ ARC_RELOC_HOWTO(ARC_TLS_GD_GOT, 69, \
                 32, \
                 replace_word32, \
                 dont, \
-                0)
+                ( G + GOT - P))
 
 ARC_RELOC_HOWTO(ARC_TLS_GD_LD, 70, \
                 2, \
-                32, \
-                replace_word32, \
+                0, \
+                replace_none, \
                 dont, \
                 0)
 
@@ -416,35 +416,35 @@ ARC_RELOC_HOWTO(ARC_TLS_IE_GOT, 72, \
                 32, \
                 replace_word32, \
                 dont, \
-                0)
+                ( G + GOT - P))
 
 ARC_RELOC_HOWTO(ARC_TLS_DTPOFF, 67, \
                 2, \
                 32, \
                 replace_word32, \
                 dont, \
-                0)
+                ( S - TLS_REL ))
 
 ARC_RELOC_HOWTO(ARC_TLS_DTPOFF_S9, 73, \
                 2, \
                 32, \
                 replace_word32, \
                 dont, \
-                0)
+                ( S - TLS_REL ))
 
 ARC_RELOC_HOWTO(ARC_TLS_LE_S9, 74, \
                 2, \
                 32, \
                 replace_word32, \
                 dont, \
-                0)
+                ( ( S + TCB_SIZE ) - TLS_REL ))
 
 ARC_RELOC_HOWTO(ARC_TLS_LE_32, 75, \
                 2, \
                 32, \
                 replace_word32, \
                 dont, \
-                0)
+                ( ( S + A + TCB_SIZE ) - TLS_REL ))
 
 ARC_RELOC_HOWTO(ARC_S25W_PCREL_PLT, 76, \
                 2, \
diff --git a/include/opcode/arc-func.h b/include/opcode/arc-func.h
index 9f0ea32..96ffcff 100644
--- a/include/opcode/arc-func.h
+++ b/include/opcode/arc-func.h
@@ -25,6 +25,7 @@
 ATTRIBUTE_UNUSED static unsigned
 replace_none (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x00;
 
   return insn;
 }
@@ -37,6 +38,7 @@ replace_none (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_bits8 (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0xff;
   insn |= ((value >> 0) & 0x00ff) << 0;
 
   return insn;
@@ -50,6 +52,7 @@ replace_bits8 (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_bits16 (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0xffff;
   insn |= ((value >> 0) & 0xffff) << 0;
 
   return insn;
@@ -63,6 +66,7 @@ replace_bits16 (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_bits24 (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0xffffff;
   insn |= ((value >> 0) & 0xffffff) << 0;
 
   return insn;
@@ -76,6 +80,7 @@ replace_bits24 (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_word32 (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0xffffffff;
   insn |= ((value >> 0) & 0xffffffff) << 0;
 
   return insn;
@@ -89,6 +94,7 @@ replace_word32 (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_limm (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0xffffffff;
   insn |= ((value >> 0) & 0xffffffff) << 0;
 
   return insn;
@@ -102,6 +108,7 @@ replace_limm (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_limms (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0xffffffff;
   insn |= ((value >> 0) & 0xffffffff) << 0;
 
   return insn;
@@ -115,6 +122,7 @@ replace_limms (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp21h (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x7feffc0;
   insn |= ((value >> 0) & 0x03ff) << 17;
   insn |= ((value >> 10) & 0x03ff) << 6;
 
@@ -129,6 +137,7 @@ replace_disp21h (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp21w (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x7fcffc0;
   insn |= ((value >> 0) & 0x01ff) << 18;
   insn |= ((value >> 9) & 0x03ff) << 6;
 
@@ -143,6 +152,7 @@ replace_disp21w (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp25h (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x7feffcf;
   insn |= ((value >> 0) & 0x03ff) << 17;
   insn |= ((value >> 10) & 0x03ff) << 6;
   insn |= ((value >> 20) & 0x000f) << 0;
@@ -158,6 +168,7 @@ replace_disp25h (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp25w (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x7fcffcf;
   insn |= ((value >> 0) & 0x01ff) << 18;
   insn |= ((value >> 9) & 0x03ff) << 6;
   insn |= ((value >> 19) & 0x000f) << 0;
@@ -173,6 +184,7 @@ replace_disp25w (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp9 (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x1ff;
   insn |= ((value >> 0) & 0x01ff) << 0;
 
   return insn;
@@ -186,6 +198,7 @@ replace_disp9 (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp9ls (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0xff8000;
   insn |= ((value >> 0) & 0x00ff) << 16;
   insn |= ((value >> 8) & 0x0001) << 15;
 
@@ -200,6 +213,7 @@ replace_disp9ls (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp9s (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x1ff;
   insn |= ((value >> 0) & 0x01ff) << 0;
 
   return insn;
@@ -213,6 +227,7 @@ replace_disp9s (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp13s (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x7ff;
   insn |= ((value >> 0) & 0x07ff) << 0;
 
   return insn;
@@ -226,6 +241,7 @@ replace_disp13s (unsigned insn, int value ATTRIBUTE_UNUSED)
 ATTRIBUTE_UNUSED static unsigned
 replace_disp9s1 (unsigned insn, int value ATTRIBUTE_UNUSED)
 {
+  insn = insn & ~0x7e7;
   insn |= ((value >> 0) & 0x0007) << 0;
   insn |= ((value >> 3) & 0x003f) << 5;