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.

(cherry picked from commit c5bb8910e80c6cd80c63541f86471c18375c8198)

7 files changed, 49 insertions, 3 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 571edd1..e1e71e1 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,9 @@
+2017-07-17  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR ld/21782
+	* elf64-x86-64.c (elf_x86_64_relocate_section): Limit PIC check
+	to shared library.
+
 2017-07-16  Alan Modra  <amodra@gmail.com>
 
 	* elf64-ppc.c (ppc64_elf_relocate_section): Don't optimize
diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 8cef9f5..c80a9ca 100644
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -4969,9 +4969,7 @@ 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/ChangeLog b/ld/ChangeLog
index 165dee9..2fb8c79 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,11 @@
+2017-07-17  H.J. Lu  <hongjiu.lu@intel.com>
+
+	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.
+
 2016-07-14  Maciej W. Rozycki  <macro@imgtec.com>
 
 	* testsuite/ld-unique/pr21529.ld: New test linker script.
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"