Handle local IFUNC symbols in shared object

Increment PLT reference count for locally defined local IFUNC symbols
in shared object since STT_GNU_IFUNC symbol must go through PLT even
if it is locally defined and undefined symbol may turn out to be a
STT_GNU_IFUNC symbol later.

bfd/

	PR ld/19784
	* elf32-i386.c (elf_i386_check_relocs): Increment PLT reference
	count for locally defined local IFUNC symbols in shared object.
	* elf64-x86-64.c (elf_x86_64_check_relocs): Likewise.

ld/

	PR ld/19784
	* testsuite/ld-i386/i386.exp: Remove pr19636-2e-nacl test.
	* testsuite/ld-i386/pr19636-2e-nacl.d: Moved to ...
	* testsuite/ld-i386/pr19636-2e.d: Here.  Remove notarget.
	* testsuite/ld-ifunc/ifunc.exp: Run PR ld/19784 tests.
	* testsuite/ld-ifunc/pass.out: New file.
	* testsuite/ld-ifunc/pr19784a.c: Likewise.
	* testsuite/ld-ifunc/pr19784b.c: Likewise.
	* testsuite/ld-ifunc/pr19784c.c: Likewise.

9 files changed, 85 insertions, 23 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 960190f..73f67b0 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,5 +1,17 @@
 2016-03-08  H.J. Lu  <hongjiu.lu@intel.com>
 
+	PR ld/19784
+	* testsuite/ld-i386/i386.exp: Remove pr19636-2e-nacl test.
+	* testsuite/ld-i386/pr19636-2e-nacl.d: Moved to ...
+	* testsuite/ld-i386/pr19636-2e.d: Here.  Remove notarget.
+	* testsuite/ld-ifunc/ifunc.exp: Run PR ld/19784 tests.
+	* testsuite/ld-ifunc/pass.out: New file.
+	* testsuite/ld-ifunc/pr19784a.c: Likewise.
+	* testsuite/ld-ifunc/pr19784b.c: Likewise.
+	* testsuite/ld-ifunc/pr19784c.c: Likewise.
+
+2016-03-08  H.J. Lu  <hongjiu.lu@intel.com>
+
 	PR ld/19774
 	* testsuite/ld-ifunc/ifunc.exp: Link tmpdir/pr18808a.o before
 	tmpdir/libpr18808.so.  Link tmpdir/pr18841a.o before
diff --git a/ld/testsuite/ld-i386/i386.exp b/ld/testsuite/ld-i386/i386.exp
index 5b9d790..a032ca7 100644
--- a/ld/testsuite/ld-i386/i386.exp
+++ b/ld/testsuite/ld-i386/i386.exp
@@ -337,7 +337,6 @@ run_dump_test "pr19636-2c-nacl"
 run_dump_test "pr19636-2d"
 run_dump_test "pr19636-2d-nacl"
 run_dump_test "pr19636-2e"
-run_dump_test "pr19636-2e-nacl"
 run_dump_test "pr19636-3a"
 run_dump_test "pr19636-3b"
 run_dump_test "pr19636-3c"
diff --git a/ld/testsuite/ld-i386/pr19636-2e-nacl.d b/ld/testsuite/ld-i386/pr19636-2e-nacl.d
deleted file mode 100644
index f791128..0000000
--- a/ld/testsuite/ld-i386/pr19636-2e-nacl.d
+++ /dev/null
@@ -1,21 +0,0 @@
-#source: pr19636-2.s
-#as: --32 -mrelax-relocations=no
-#ld: -shared -Bsymbolic -m elf_i386
-#readelf : -r --wide --dyn-syms
-#target: i?86-*-nacl* x86_64-*-nacl*
-
-Relocation section '\.rel\.dyn' at offset [0x0-9a-f]+ contains 3 entries:
- +Offset +Info +Type +Sym. Value +Symbol's Name
-[0-9a-f]+ +[0-9a-f]+ +R_386_32 +0+ +func
-[0-9a-f]+ +[0-9a-f]+ +R_386_PC32 +0+ +func
-[0-9a-f]+ +[0-9a-f]+ +R_386_GLOB_DAT +0+ +func
-
-Relocation section '\.rel\.plt' at offset [0x0-9a-f]+ contains 1 entries:
- +Offset +Info +Type +Sym. Value +Symbol's Name
-[0-9a-f]+ +[0-9a-f]+ +R_386_JUMP_SLOT +0+ +func
-
-Symbol table '\.dynsym' contains [0-9]+ entries:
- +Num: +Value +Size Type +Bind +Vis +Ndx Name
-#...
- +[0-9]+: +[a-f0-9]+ +0 +NOTYPE +WEAK +DEFAULT +UND +func
-#pass
diff --git a/ld/testsuite/ld-i386/pr19636-2e.d b/ld/testsuite/ld-i386/pr19636-2e.d
index 148e306..c985242 100644
--- a/ld/testsuite/ld-i386/pr19636-2e.d
+++ b/ld/testsuite/ld-i386/pr19636-2e.d
@@ -2,7 +2,6 @@
 #as: --32 -mrelax-relocations=no
 #ld: -shared -Bsymbolic -m elf_i386
 #readelf : -r --wide --dyn-syms
-#notarget: i?86-*-nacl* x86_64-*-nacl*
 
 Relocation section '\.rel\.dyn' at offset [0x0-9a-f]+ contains 3 entries:
  +Offset +Info +Type +Sym. Value +Symbol's Name
@@ -10,6 +9,10 @@ Relocation section '\.rel\.dyn' at offset [0x0-9a-f]+ contains 3 entries:
 [0-9a-f]+ +[0-9a-f]+ +R_386_PC32 +0+ +func
 [0-9a-f]+ +[0-9a-f]+ +R_386_GLOB_DAT +0+ +func
 
+Relocation section '\.rel\.plt' at offset [0x0-9a-f]+ contains 1 entries:
+ +Offset +Info +Type +Sym. Value +Symbol's Name
+[0-9a-f]+ +[0-9a-f]+ +R_386_JUMP_SLOT +0+ +func
+
 Symbol table '\.dynsym' contains [0-9]+ entries:
  +Num: +Value +Size Type +Bind +Vis +Ndx Name
 #...
diff --git a/ld/testsuite/ld-ifunc/ifunc.exp b/ld/testsuite/ld-ifunc/ifunc.exp
index 96627e7..e860f36 100644
--- a/ld/testsuite/ld-ifunc/ifunc.exp
+++ b/ld/testsuite/ld-ifunc/ifunc.exp
@@ -505,6 +505,30 @@ run_cc_link_tests [list \
 	{} \
 	"libpr18841c.so" \
     ] \
+    [list \
+	"Build libpr19784a.so" \
+	"-shared -Wl,-Bsymbolic-functions" \
+	"-fPIC -O2 -g" \
+	{ pr19784b.c pr19784c.c } \
+	{} \
+	"libpr19784a.so" \
+    ] \
+    [list \
+	"Build libpr19784b.so" \
+	"-shared -Wl,-Bsymbolic-functions" \
+	"-fPIC -O2 -g" \
+	{ pr19784c.c pr19784b.c } \
+	{} \
+	"libpr19784b.so" \
+    ] \
+    [list \
+	"Build pr19784a.o" \
+	"" \
+	"" \
+	{ pr19784a.c } \
+	"" \
+	"" \
+    ] \
 ]
 
 run_ld_link_exec_tests [] [list \
@@ -532,4 +556,20 @@ run_ld_link_exec_tests [] [list \
 	"pr18841c" \
 	"pr18841.out" \
     ] \
+    [list \
+	"Run pr19784a" \
+	"tmpdir/pr19784a.o tmpdir/libpr19784a.so" \
+	"" \
+	{ dummy.c } \
+	"pr19784a" \
+	"pass.out" \
+    ] \
+    [list \
+	"Run pr19784b" \
+	"--as-needed tmpdir/pr19784a.o tmpdir/libpr19784b.so" \
+	"" \
+	{ dummy.c } \
+	"pr19784b" \
+	"pass.out" \
+    ] \
 ]
diff --git a/ld/testsuite/ld-ifunc/pass.out b/ld/testsuite/ld-ifunc/pass.out
new file mode 100644
index 0000000..7ef22e9
--- /dev/null
+++ b/ld/testsuite/ld-ifunc/pass.out
@@ -0,0 +1 @@
+PASS
diff --git a/ld/testsuite/ld-ifunc/pr19784a.c b/ld/testsuite/ld-ifunc/pr19784a.c
new file mode 100644
index 0000000..c922cb9
--- /dev/null
+++ b/ld/testsuite/ld-ifunc/pr19784a.c
@@ -0,0 +1,6 @@
+void bar(void);
+int main(void)
+{
+  bar();
+  return 0;
+}
diff --git a/ld/testsuite/ld-ifunc/pr19784b.c b/ld/testsuite/ld-ifunc/pr19784b.c
new file mode 100644
index 0000000..8ea7ce2
--- /dev/null
+++ b/ld/testsuite/ld-ifunc/pr19784b.c
@@ -0,0 +1,11 @@
+int foo (int x) __attribute__ ((ifunc ("resolve_foo")));
+
+static int foo_impl(int x)
+{
+  return x;
+}
+
+void *resolve_foo (void)
+{
+  return (void *) foo_impl;
+}
diff --git a/ld/testsuite/ld-ifunc/pr19784c.c b/ld/testsuite/ld-ifunc/pr19784c.c
new file mode 100644
index 0000000..117dfec
--- /dev/null
+++ b/ld/testsuite/ld-ifunc/pr19784c.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+extern void abort (void);
+extern int foo (int) __attribute__ ((visibility("hidden")));
+
+int bar()
+{
+  if (foo (5) != 5)
+    abort ();
+  printf("PASS\n");
+}