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[AArch64][2/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21

From: Jiong Wang <jiong dot wang at arm dot com>
To: "binutils\ at sourceware dot org" <binutils at sourceware dot org>
Date: Fri, 24 Jul 2015 16:36:31 +0100
Subject: [AArch64][2/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
Authentication-results: sourceware.org; auth=none

2015-07-24  Jiong Wang  <jiong.wang@arm.com>

bfd/
  * reloc.c (BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21): New entry. 
  * bfd-in2.h: Regenerate.
  * libbfd.h: Regenerate.
  * elfnn-aarch64.c (elfNN_aarch64_howto_table): New entry for
  BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21.

gas/
  * config/tc-aarch64.c (reloc_table): New relocation modifiers.
  (md_apply_fix): Support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21.
  (aarch64_force_relocation): Ditto.

gas/testsuite/
  * gas/aarch64/reloc-tlsldm-page-1.s: New testcase.
  * gas/aarch64/reloc-tlsldm-page-ilp32-1.s: Ditto.
  * gas/aarch64/reloc-tlsldm-page-1.d: New expectation file.
  * gas/aarch64/reloc-tlsldm-page-ilp32-1.d: Ditto.
-- 
Regards,
Jiong

diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index f924b21..aa70360 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -5794,6 +5794,10 @@ BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21.  */
 /* AArch64 TLS INITIAL EXEC relocation.  */
   BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19,
 
+/* GOT entry page address for AArch64 TLS Local Dynamic, used with ADRP
+instruction.  */
+  BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21,
+
 /* GOT entry address for AArch64 TLS Local Dynamic, used with ADR instruction.  */
   BFD_RELOC_AARCH64_TLSLD_ADR_PREL21,
 
diff --git a/bfd/elfnn-aarch64.c b/bfd/elfnn-aarch64.c
index f182860..655b4d0 100644
--- a/bfd/elfnn-aarch64.c
+++ b/bfd/elfnn-aarch64.c
@@ -1025,6 +1025,22 @@ static reloc_howto_type elfNN_aarch64_howto_table[] =
 	 0x1ffffc,		/* dst_mask */
 	 FALSE),		/* pcrel_offset */

+  /* Get to the page for the GOT entry for the symbol
+     (G(S) - P) using an ADRP instruction.  */
+  HOWTO (AARCH64_R (TLSLD_ADR_PAGE21),	/* type */
+	 12,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 21,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 AARCH64_R_STR (TLSLD_ADR_PAGE21),	/* name */
+	 FALSE,			/* partial_inplace */
+	 0x1fffff,		/* src_mask */
+	 0x1fffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+
   HOWTO (AARCH64_R (TLSLD_ADR_PREL21),	/* type */
 	 0,			/* rightshift */
 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
diff --git a/bfd/libbfd.h b/bfd/libbfd.h
index 18e3c40..03e9393 100644
--- a/bfd/libbfd.h
+++ b/bfd/libbfd.h
@@ -2759,6 +2759,7 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
   "BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC",
   "BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC",
   "BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19",
+  "BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21",
   "BFD_RELOC_AARCH64_TLSLD_ADR_PREL21",
   "BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2",
   "BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1",
diff --git a/bfd/reloc.c b/bfd/reloc.c
index 3478006..d6252c8 100644
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -6844,6 +6844,11 @@ ENUM
 ENUMDOC
   AArch64 TLS INITIAL EXEC relocation.
 ENUM
+  BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
+ENUMDOC
+  GOT entry page address for AArch64 TLS Local Dynamic, used with ADRP
+  instruction.
+ENUM
   BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
 ENUMDOC
   GOT entry address for AArch64 TLS Local Dynamic, used with ADR instruction.
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 8d403f3..c01ec6d 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -2507,7 +2507,7 @@ static struct reloc_table_entry reloc_table[] = {
      zero without any outstanding runtime relocation. */
   {"tlsldm", 0,
    BFD_RELOC_AARCH64_TLSLD_ADR_PREL21, /* adr_type */
-   0,
+   BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21,
    0,
    0,
    0,
@@ -6778,6 +6778,7 @@ md_apply_fix (fixS * fixP, valueT * valP, segT seg)
     case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
     case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
     case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
+    case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
     case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
@@ -6988,6 +6989,7 @@ aarch64_force_relocation (struct fix *fixp)
     case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
     case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
     case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
+    case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
     case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
     case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsldm-page-1.d b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-1.d
new file mode 100644
index 0000000..5d757a4
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-1.d
@@ -0,0 +1,10 @@
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+0000000000000000 <.*>:
+   0:	8b030041 	add	x1, x2, x3
+   4:	90000000 	adrp	x0, 0 <dummy>
+			4: R_AARCH64_TLSLD_ADR_PAGE21	dummy
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsldm-page-1.s b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-1.s
new file mode 100644
index 0000000..19c18cb
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-1.s
@@ -0,0 +1,6 @@
+// Test file for AArch64 GAS -- tlsldm page
+
+func:
+	add	x1, x2, x3
+	// BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
+	adrp	x0, :tlsldm:dummy
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsldm-page-ilp32-1.d b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-ilp32-1.d
new file mode 100644
index 0000000..e2c81ef
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-ilp32-1.d
@@ -0,0 +1,12 @@
+#as: -mabi=ilp32
+#objdump: -dr
+
+.*:     file format .*
+
+Disassembly of section \.text:
+
+00000000 <.*>:
+   0:	0b030041 	add	w1, w2, w3
+   4:	90000000 	adrp	x0, 0 <dummy>
+			4: R_AARCH64_P32_TLSLD_ADR_PAGE21	dummy
+
diff --git a/gas/testsuite/gas/aarch64/reloc-tlsldm-page-ilp32-1.s b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-ilp32-1.s
new file mode 100644
index 0000000..12e9e53
--- /dev/null
+++ b/gas/testsuite/gas/aarch64/reloc-tlsldm-page-ilp32-1.s
@@ -0,0 +1,6 @@
+// Test file for AArch64 GAS -- tlsldm page ILP32
+
+func:
+	add	w1, w2, w3
+	// BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
+	adrp	x0, :tlsldm:dummy

Follow-Ups:
- Re: [AArch64][2/8] GAS support BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
  - From: Marcus Shawcroft

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