Add support for constructing pc-relative addresses to the plt, by

adding the necessary assembly operators and relocations.

bfd:
	* reloc.c (Add BFD_RELOC_TILEGX_IMM16_X0_HW0_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X1_HW0_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X0_HW1_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X1_HW1_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X0_HW2_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X1_HW2_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X0_HW3_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X1_HW3_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL,
	BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL): new relocations.
	* elfxx-tilegx.c (tilegx_elf_howto_table): Handle new relocations.
	(tilegx_reloc_map): Ditto.
	(reloc_to_create_func): Ditto.
	(tilegx_elf_check_relocs): Ditto.
	(tilegx_elf_gc_sweep_hook): Ditto.
	(tilegx_elf_relocate_section): Ditto.
	* libbfd.h: Regenerate.
	* bfd-in2.h: Regenerate.

gas:
	* tc-tilegx.c (O_hw0_plt): Define operator.
	(O_hw1_plt): Ditto.
	(O_hw1_last_plt): Ditto.
	(O_hw2_last_plt): Ditto.
	(md_begin): Handle new operators.
	(emit_tilegx_instruction): Ditto.
	(md_apply_fix): Ditto.
	* doc/c-tilegx.texi: Document new operators.

include/elf:
	* tilegx.h (R_TILEGX_IMM16_X0_HW0_PLT_PCREL): New relocation.
	(R_TILEGX_IMM16_X1_HW0_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X0_HW1_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X1_HW1_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X0_HW2_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X1_HW2_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X0_HW3_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X1_HW3_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL): Ditto.
	(R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL	): Ditto.
	(R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL): Ditto.

1 files changed, 87 insertions, 30 deletions

diff --git a/bfd/elfxx-tilegx.c b/bfd/elfxx-tilegx.c
index 6f748ece7..1f5c4587d 100644
--- a/bfd/elfxx-tilegx.c
+++ b/bfd/elfxx-tilegx.c
@@ -490,21 +490,21 @@ static reloc_howto_type tilegx_elf_howto_table [] =
 
   TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_GOT, 0),
   TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_GOT, 0),
-  /* These relocs are currently not defined.  */
-  EMPTY_HOWTO (66),
-  EMPTY_HOWTO (67),
-  EMPTY_HOWTO (68),
-  EMPTY_HOWTO (69),
-  EMPTY_HOWTO (70),
-  EMPTY_HOWTO (71),
+
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW0_PLT_PCREL, 0),
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW0_PLT_PCREL, 0),
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW1_PLT_PCREL, 16),
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW1_PLT_PCREL, 16),
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW2_PLT_PCREL, 32),
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW2_PLT_PCREL, 32),
 
   TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_GOT, 0),
   TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_GOT, 0),
   TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_GOT, 16),
   TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_GOT, 16),
-  /* These relocs are currently not defined.  */
-  EMPTY_HOWTO (76),
-  EMPTY_HOWTO (77),
+
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW3_PLT_PCREL, 48),
+  TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW3_PLT_PCREL, 48),
 
   TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_TLS_GD, 0),
   TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_TLS_GD, 0),
@@ -530,12 +530,13 @@ static reloc_howto_type tilegx_elf_howto_table [] =
 
   TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X0_HW0_TLS_IE, 0),
   TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X1_HW0_TLS_IE, 0),
-  EMPTY_HOWTO (94),
-  EMPTY_HOWTO (95),
-  EMPTY_HOWTO (96),
-  EMPTY_HOWTO (97),
-  EMPTY_HOWTO (98),
-  EMPTY_HOWTO (99),
+
+  TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL,  0),
+  TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL,  0),
+  TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL, 16),
+  TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL, 16),
+  TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL, 32),
+  TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL, 32),
 
 #define TILEGX_IMM16_HOWTO_LAST_TLS_IE(name, rshift) \
   HOWTO (name, rshift, 1, 16, FALSE, 0, \
@@ -713,10 +714,18 @@ static const reloc_map tilegx_reloc_map [] =
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PCREL)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_GOT)
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_GOT)
+  SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PLT_PCREL)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_GOT)
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_GOT)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_GOT)
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_GOT)
+  SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PLT_PCREL)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_GD)
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_GD)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_LE)
@@ -731,6 +740,12 @@ static const reloc_map tilegx_reloc_map [] =
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_GD)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_IE)
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_IE)
+  SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL)
+  SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_IE)
   SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_IE)
   SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_IE)
@@ -1027,18 +1042,10 @@ static const tilegx_create_func reloc_to_create_func[] =
   create_Imm16_X1,
   create_Imm16_X0,
   create_Imm16_X1,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
   create_Imm16_X0,
   create_Imm16_X1,
   create_Imm16_X0,
   create_Imm16_X1,
-  NULL,
-  NULL,
   create_Imm16_X0,
   create_Imm16_X1,
   create_Imm16_X0,
@@ -1051,16 +1058,24 @@ static const tilegx_create_func reloc_to_create_func[] =
   create_Imm16_X1,
   create_Imm16_X0,
   create_Imm16_X1,
-  NULL,
-  NULL,
+  create_Imm16_X0,
+  create_Imm16_X1,
+  create_Imm16_X0,
+  create_Imm16_X1,
+  create_Imm16_X0,
+  create_Imm16_X1,
   create_Imm16_X0,
   create_Imm16_X1,
   NULL,
   NULL,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
+  create_Imm16_X0,
+  create_Imm16_X1,
+  create_Imm16_X0,
+  create_Imm16_X1,
+  create_Imm16_X0,
+  create_Imm16_X1,
+  create_Imm16_X0,
+  create_Imm16_X1,
   create_Imm16_X0,
   create_Imm16_X1,
   create_Imm16_X0,
@@ -1855,6 +1870,20 @@ tilegx_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
 	  /* Fall through */
 
         case R_TILEGX_JUMPOFF_X1_PLT:
+	case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
 	  /* This symbol requires a procedure linkage table entry.  We
 	     actually build the entry in adjust_dynamic_symbol,
 	     because this might be a case of linking PIC code without
@@ -2248,6 +2277,20 @@ tilegx_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
 	  /* Fall through.  */
 
         case R_TILEGX_JUMPOFF_X1_PLT:
+	case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
 	  if (h != NULL)
 	    {
 	      if (h->plt.refcount > 0)
@@ -3440,6 +3483,20 @@ tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
 	  break;
 
         case R_TILEGX_JUMPOFF_X1_PLT:
+	case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
+	case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
 	  /* Relocation is to the entry for this symbol in the
 	     procedure linkage table.  */
           BFD_ASSERT (h != NULL);