From c5bb8910e80c6cd80c63541f86471c18375c8198 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Mon, 17 Jul 2017 12:17:59 -0700
Subject: [PATCH] x86-64: Limit PIC check to shared library build

When building an executable, undefined symbols are error and undefined
weak symbols are resolved to zero.  We only need to check PIC for
building a shared library.

bfd/

	PR ld/21782
	* elf64-x86-64.c (elf_x86_64_relocate_section): Limit PIC check
	to shared library.

ld/

	PR ld/21782
	* testsuite/ld-x86-64/pie3-nacl.d: New file.
	* testsuite/ld-x86-64/pie3.d: Likewise.
	* testsuite/ld-x86-64/pie3.s: Likewise.
	* testsuite/ld-x86-64/x86-64.exp: Run pie3 and pie3-nacl.
---
 bfd/elf64-x86-64.c                 |  4 +---
 ld/testsuite/ld-x86-64/pie3-nacl.d | 14 ++++++++++++++
 ld/testsuite/ld-x86-64/pie3.d      | 13 +++++++++++++
 ld/testsuite/ld-x86-64/pie3.s      |  5 +++++
 ld/testsuite/ld-x86-64/x86-64.exp  |  2 ++
 5 files changed, 35 insertions(+), 3 deletions(-)
 create mode 100644 ld/testsuite/ld-x86-64/pie3-nacl.d
 create mode 100644 ld/testsuite/ld-x86-64/pie3.d
 create mode 100644 ld/testsuite/ld-x86-64/pie3.s

diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 79bc9fb..3658df4 100644
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -4968,9 +4968,7 @@ do_ifunc_pointer:
 	      && ((bfd_link_executable (info)
 		   && h->root.type == bfd_link_hash_undefweak
 		   && !resolved_to_zero)
-		  || (bfd_link_pic (info)
-		      && !(bfd_link_pie (info)
-			   && h->root.type == bfd_link_hash_undefined))))
+		  || bfd_link_dll (info)))
 	    {
 	      bfd_boolean fail = FALSE;
 	      bfd_boolean branch
diff --git a/ld/testsuite/ld-x86-64/pie3-nacl.d b/ld/testsuite/ld-x86-64/pie3-nacl.d
new file mode 100644
index 0000000..59f5e3e
--- /dev/null
+++ b/ld/testsuite/ld-x86-64/pie3-nacl.d
@@ -0,0 +1,14 @@
+#source: pie3.s
+#as: --64
+#ld: -pie -melf_x86_64
+#objdump: -dw
+#target: x86_64-*-nacl*
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+ +0:	48 8d 05 f9 ff ff ff 	lea    -0x7\(%rip\),%rax        # 0 <_start>
+#pass
diff --git a/ld/testsuite/ld-x86-64/pie3.d b/ld/testsuite/ld-x86-64/pie3.d
new file mode 100644
index 0000000..a200deb
--- /dev/null
+++ b/ld/testsuite/ld-x86-64/pie3.d
@@ -0,0 +1,13 @@
+#as: --64
+#ld: -pie -melf_x86_64
+#objdump: -dw
+#notarget: x86_64-*-nacl*
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+191 <_start>:
+ +191:	48 8d 05 68 fe ff ff 	lea    -0x198\(%rip\),%rax        # 0 <_start-0x191>
+#pass
diff --git a/ld/testsuite/ld-x86-64/pie3.s b/ld/testsuite/ld-x86-64/pie3.s
new file mode 100644
index 0000000..72914d9
--- /dev/null
+++ b/ld/testsuite/ld-x86-64/pie3.s
@@ -0,0 +1,5 @@
+	.text
+	.global _start
+	.weak foo
+_start:
+	leaq	foo(%rip), %rax
diff --git a/ld/testsuite/ld-x86-64/x86-64.exp b/ld/testsuite/ld-x86-64/x86-64.exp
index 9b83e1c..c582582 100644
--- a/ld/testsuite/ld-x86-64/x86-64.exp
+++ b/ld/testsuite/ld-x86-64/x86-64.exp
@@ -310,6 +310,8 @@ run_dump_test "pr14207"
 run_dump_test "gotplt1"
 run_dump_test "pie1"
 run_dump_test "pie2"
+run_dump_test "pie3"
+run_dump_test "pie3-nacl"
 run_dump_test "pic1"
 run_dump_test "largecomm-1a"
 run_dump_test "largecomm-1b"
-- 
2.7.4