[GAS][AARCH64]Add TLSDESC large memory model support.

bfd/

2015-10-02  Renlin Li <renlin.li@arm.com>

	* elfnn-aarch64.c (elfNN_aarch64_howto_table): Check overflow for
	BFD_RELOC_AARCH64_TLSDESC_OFF_G1.

gas/

2015-10-02  Renlin Li <renlin.li@arm.com>

	* config/tc-aarch64.c (s_tlsdescadd): New.
	(s_tlsdescldr): New.
	(md_pseudo_table): Handle tlsdescadd and tlsdescldr pseudo ops.
	(reloc_table): Add entries for BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC and
	BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC.
	(process_movw_reloc_info): Support AARCH64_TLSDESC_OFF_G1 and
	    AARCH64_TLSDESC_OFF_G0_NC.
	(md_apply_fix): Likewise.
	(aarch64_force_relocation): Likewise.

gas/testsuite/

2015-10-02  Renlin Li <renlin.li@arm.com>

	* gas/aarch64/reloc-tlsdesc_off_g0_nc.d: New.
	* gas/aarch64/reloc-tlsdesc_off_g0_nc.s: New.
	* gas/aarch64/reloc-tlsdesc_off_g1.d: New.
	* gas/aarch64/reloc-tlsdesc_off_g1.s: New.
	* gas/aarch64/tls-desc.d: New.
	* gas/aarch64/tls-desc.s: New.

9 files changed, 152 insertions, 0 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 38175b1..2ece5c0 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,17 @@
 2015-10-02  Renlin Li <renlin.li@arm.com>
 
+	* config/tc-aarch64.c (s_tlsdescadd): New.
+	(s_tlsdescldr): New.
+	(md_pseudo_table): Handle tlsdescadd and tlsdescldr pseudo ops.
+	(reloc_table): Add entries for BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC and
+	BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC.
+	(process_movw_reloc_info): Support AARCH64_TLSDESC_OFF_G1 and
+	AARCH64_TLSDESC_OFF_G0_NC.
+	(md_apply_fix): Likewise.
+	(aarch64_force_relocation): Likewise.
+
+2015-10-02  Renlin Li <renlin.li@arm.com>
+
 	* config/tc-aarch64.c (reloc_table): Add two entries for
 	gottprel_g0_nc and gottprel_g1.
 	(process_movw_reloc_info): Add support.
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 8d6f1f9..a0cf976 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -1892,6 +1892,21 @@ s_aarch64_inst (int ignored ATTRIBUTE_UNUSED)
 }
 
 #ifdef OBJ_ELF
+/* Emit BFD_RELOC_AARCH64_TLSDESC_ADD on the next ADD instruction.  */
+
+static void
+s_tlsdescadd (int ignored ATTRIBUTE_UNUSED)
+{
+  expressionS exp;
+
+  expression (&exp);
+  frag_grow (4);
+  fix_new_aarch64 (frag_now, frag_more (0) - frag_now->fr_literal, 4, &exp, 0,
+		   BFD_RELOC_AARCH64_TLSDESC_ADD);
+
+  demand_empty_rest_of_line ();
+}
+
 /* Emit BFD_RELOC_AARCH64_TLSDESC_CALL on the next BLR instruction.  */
 
 static void
@@ -1911,6 +1926,21 @@ s_tlsdesccall (int ignored ATTRIBUTE_UNUSED)
 
   demand_empty_rest_of_line ();
 }
+
+/* Emit BFD_RELOC_AARCH64_TLSDESC_LDR on the next LDR instruction.  */
+
+static void
+s_tlsdescldr (int ignored ATTRIBUTE_UNUSED)
+{
+  expressionS exp;
+
+  expression (&exp);
+  frag_grow (4);
+  fix_new_aarch64 (frag_now, frag_more (0) - frag_now->fr_literal, 4, &exp, 0,
+		   BFD_RELOC_AARCH64_TLSDESC_LDR);
+
+  demand_empty_rest_of_line ();
+}
 #endif	/* OBJ_ELF */
 
 static void s_aarch64_arch (int);
@@ -1936,7 +1966,9 @@ const pseudo_typeS md_pseudo_table[] = {
   {"arch_extension", s_aarch64_arch_extension, 0},
   {"inst", s_aarch64_inst, 0},
 #ifdef OBJ_ELF
+  {"tlsdescadd", s_tlsdescadd, 0},
   {"tlsdesccall", s_tlsdesccall, 0},
+  {"tlsdescldr", s_tlsdescldr, 0},
   {"word", s_aarch64_elf_cons, 4},
   {"long", s_aarch64_elf_cons, 4},
   {"xword", s_aarch64_elf_cons, 8},
@@ -2648,6 +2680,24 @@ static struct reloc_table_entry reloc_table[] = {
    0,
    0},
 
+  /* Lower 16 bit offset into GOT entry for a symbol */
+  {"tlsdesc_off_g0_nc", 0,
+   0,				/* adr_type */
+   0,
+   BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC,
+   0,
+   0,
+   0},
+
+  /* Higher 16 bit offset into GOT entry for a symbol */
+  {"tlsdesc_off_g1", 0,
+   0,				/* adr_type */
+   0,
+   BFD_RELOC_AARCH64_TLSDESC_OFF_G1,
+   0,
+   0,
+   0},
+
   /* Get to the page containing GOT TLS entry for a symbol */
   {"gottprel", 0,
    0,				/* adr_type */
@@ -4723,6 +4773,7 @@ process_movw_reloc_info (void)
     case BFD_RELOC_AARCH64_MOVW_G0_NC:
     case BFD_RELOC_AARCH64_MOVW_G0_S:
     case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
+    case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
     case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
     case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
     case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0:
@@ -4735,6 +4786,7 @@ process_movw_reloc_info (void)
     case BFD_RELOC_AARCH64_MOVW_G1_NC:
     case BFD_RELOC_AARCH64_MOVW_G1_S:
     case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
+    case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
     case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
     case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
     case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1:
@@ -6859,6 +6911,22 @@ md_apply_fix (fixS * fixP, valueT * valP, segT seg)
     case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
       scale = 16;
       goto movw_common;
+    case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
+      scale = 0;
+      S_SET_THREAD_LOCAL (fixP->fx_addsy);
+      /* Should always be exported to object file, see
+	 aarch64_force_relocation().  */
+      gas_assert (!fixP->fx_done);
+      gas_assert (seg->use_rela_p);
+      goto movw_common;
+    case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
+      scale = 16;
+      S_SET_THREAD_LOCAL (fixP->fx_addsy);
+      /* Should always be exported to object file, see
+	 aarch64_force_relocation().  */
+      gas_assert (!fixP->fx_done);
+      gas_assert (seg->use_rela_p);
+      goto movw_common;
     case BFD_RELOC_AARCH64_MOVW_G2:
     case BFD_RELOC_AARCH64_MOVW_G2_NC:
     case BFD_RELOC_AARCH64_MOVW_G2_S:
@@ -6888,6 +6956,7 @@ md_apply_fix (fixS * fixP, valueT * valP, segT seg)
 		case BFD_RELOC_AARCH64_MOVW_G2:
 		case BFD_RELOC_AARCH64_MOVW_G3:
 		case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
+		case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
 		  if (unsigned_overflow (value, scale + 16))
 		    as_bad_where (fixP->fx_file, fixP->fx_line,
 				  _("unsigned value out of range"));
@@ -7185,6 +7254,8 @@ aarch64_force_relocation (struct fix *fixp)
     case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
     case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
     case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
+    case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
+    case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
     case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
     case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
     case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index ce49c44..ba63994 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,5 +1,14 @@
 2015-10-02  Renlin Li <renlin.li@arm.com>
 
+	* gas/aarch64/reloc-tlsdesc_off_g0_nc.d: New.
+	* gas/aarch64/reloc-tlsdesc_off_g0_nc.s: New.
+	* gas/aarch64/reloc-tlsdesc_off_g1.d: New.
+	* gas/aarch64/reloc-tlsdesc_off_g1.s: New.
+	* gas/aarch64/tls-desc.d: New.
+	* gas/aarch64/tls-desc.s: New.
+
+2015-10-02  Renlin Li <renlin.li@arm.com>
+
 	* gas/aarch64/reloc-gottprel_g0_nc.d: New.
 	* gas/aarch64/reloc-gottprel_g0_nc.s: New.
 	* gas/aarch64/reloc-gottprel_g1.d: New.
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g0_nc.d b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g0_nc.d
new file mode 100644
index 0000000..3d3c548
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g0_nc.d
@@ -0,0 +1,9 @@
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0000000000000000 <.*>:
+   0:	f280001c 	movk	x28, #0x0
+			0: R_AARCH64_TLSDESC_OFF_G0_NC	x
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g0_nc.s b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g0_nc.s
new file mode 100644
index 0000000..1c8a208
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g0_nc.s
@@ -0,0 +1,5 @@
+// Test file for AArch64 GAS -- tlsdesc_off_g0_nc
+
+func:
+	// BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
+	movk    x28, #:tlsdesc_off_g0_nc:x
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g1.d b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g1.d
new file mode 100644
index 0000000..4fc1082
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g1.d
@@ -0,0 +1,8 @@
+#objdump: -dr
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0000000000000000 <.*>:
+   0:	d2a0001c 	movz	x28, #0x0, lsl #16
+			0: R_AARCH64_TLSDESC_OFF_G1	x
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g1.s b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g1.s
new file mode 100644
index 0000000..5b3ec7f
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsdesc_off_g1.s
@@ -0,0 +1,5 @@
+// Test file for AArch64 GAS -- tlsdesc_off_g1
+
+func:
+	// BFD_RELOC_AARCH64_TLSDESC_OFF_G1
+	movz    x28, #:tlsdesc_off_g1:x
diff --git a/gas/testsuite/gas/aarch64/tls-desc.d b/gas/testsuite/gas/aarch64/tls-desc.d
new file mode 100644
index 0000000..751e797
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/tls-desc.d
@@ -0,0 +1,17 @@
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0000000000000000 <.*>:
+   0:	d2a00000 	movz	x0, #0x0, lsl #16
+			0: R_AARCH64_TLSDESC_OFF_G1	var
+   4:	f2800000 	movk	x0, #0x0
+			4: R_AARCH64_TLSDESC_OFF_G0_NC	var
+   8:	f8606a41 	ldr	x1, \[x18,x0\]
+			8: R_AARCH64_TLSDESC_LDR	var
+   c:	8b000240 	add	x0, x18, x0
+			c: R_AARCH64_TLSDESC_ADD	var
+  10:	d63f0020 	blr	x1
+			10: R_AARCH64_TLSDESC_CALL	var
diff --git a/gas/testsuite/gas/aarch64/tls-desc.s b/gas/testsuite/gas/aarch64/tls-desc.s
new file mode 100644
index 0000000..fb9995e
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/tls-desc.s
@@ -0,0 +1,16 @@
+func:
+
+	// R_AARCH64_TLSDESC_0FF_G1  var
+	movz  x0, #:tlsdesc_off_g1:var
+	// R_AARCH64_TLSDESC_OFF_G0_NC var
+	movk  x0, #:tlsdesc_off_g0_nc:var
+
+	.tlsdescldr var
+	// R_AARCH64_TLSDESC_LDR  var
+	ldr   x1, [x18, x0]
+	.tlsdescadd var
+	// R_AARCH64_TLSDESC_ADD  var
+	add   x0, x18, x0
+	.tlsdesccall var
+	// R_AARCH64_TLSDESC_CALL  var
+	blr   x1