ld: Add -static-pie tests

Add -static-pie tests for DT_INIT_ARRAY, DT_FINI_ARRAY, DT_PREINIT_ARRAY
and IFUNC.

	* testsuite/config/default.exp (STATIC_PIE_LDFLAGS): New.  Set
	to "-static-pie" if target compiler supports it.
	* testsuite/ld-elf/elf.exp: Run -static-pie tests if
	$STATIC_PIE_LDFLAGS isn't empty.
	* testsuite/ld-ifunc/ifunc.exp: Likewise.

ld/ChangeLog

@@ -1,3 +1,11 @@
+2019-04-11  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* testsuite/config/default.exp (STATIC_PIE_LDFLAGS): New.  Set
+	to "-static-pie" if target compiler supports it.
+	* testsuite/ld-elf/elf.exp: Run -static-pie tests if
+	$STATIC_PIE_LDFLAGS isn't empty.
+	* testsuite/ld-ifunc/ifunc.exp: Likewise.
+
 2019-04-11  Tamar Christina  <tamar.christina@arm.com>
 
 	PR ld/24302

ld/testsuite/config/default.exp

@@ -454,3 +454,40 @@ if { ![info exists STATIC_LDFLAGS] } then {
 	set STATIC_LDFLAGS ""
     }
 }
+
+# Set STATIC_PIE_LDFLAGS to "-static-pie" if target compiler supports it.
+
+if { ![info exists STATIC_PIE_LDFLAGS] } then {
+    if { [which $CC] != 0 } {
+	# Check if gcc supports -static-pie.
+	set flags ""
+	if [board_info [target_info name] exists cflags] {
+	    append flags " [board_info [target_info name] cflags]"
+	}
+	if [board_info [target_info name] exists ldflags] {
+	    append flags " [board_info [target_info name] ldflags]"
+	}
+
+	set basename "tmpdir/static[pid]"
+	set src ${basename}.c
+	set output ${basename}
+	set f [open $src "w"]
+	puts $f "int main (void) { return 0; }"
+	close $f
+	if [is_remote host] {
+	    set src [remote_download host $src]
+	}
+	set static_available [run_host_cmd_yesno "$CC" "-static-pie $flags $src -o $output"]
+	remote_file host delete $src
+	remote_file host delete $output
+	file delete $src
+
+	if { $static_available == 1 } then {
+	    set STATIC_PIE_LDFLAGS "-static-pie"
+	} else {
+	    set STATIC_PIE_LDFLAGS ""
+	}
+    } else {
+	set STATIC_PIE_LDFLAGS ""
+    }
+}

ld/testsuite/ld-elf/elf.exp

@@ -235,6 +235,56 @@ if { [istarget *-*-linux*]
      || [istarget *-*-gnu*] } {
     run_ld_link_exec_tests $array_tests_pie $xfails
 
+    if { $STATIC_PIE_LDFLAGS != "" } then {
+	run_ld_link_exec_tests [list \
+	    [list \
+		"Static PIE preinit array" \
+		"$STATIC_PIE_LDFLAGS" \
+		"" \
+		{preinit.c} \
+		"preinit-static-pie" \
+		"preinit.out" \
+		"-fPIE" \
+	    ] \
+	    [list \
+		"Static PIE init array" \
+		"$STATIC_PIE_LDFLAGS" \
+		"" \
+		{init.c} \
+		"init-static-pie" \
+		"init.out" \
+		"-fPIE" \
+	    ] \
+	    [list \
+		"Static PIE fini array" \
+		"$STATIC_PIE_LDFLAGS" \
+		"" \
+		{fini.c} \
+		"fini-static-pie" \
+		"fini.out" \
+		"-fPIE" \
+	    ] \
+	    [list \
+		"Static PIE init array mixed" \
+		"$STATIC_PIE_LDFLAGS" \
+		"" \
+		{init-mixed.c} \
+		"init-mixed-static-pie" \
+		"init-mixed.out" \
+		"-I.  -fPIE" \
+	    ] \
+	    [list \
+		"Static PIE PR ld/14525" \
+		"$STATIC_PIE_LDFLAGS" \
+		"" \
+		{pr14525.c} \
+		"pr14525-static-pie" \
+		"pr14525.out" \
+		"-fPIE" \
+	    ] \
+	]
+    }
+
     run_ld_link_exec_tests [list \
 	[list \
 	    "Run mbind2a" \

ld/testsuite/ld-ifunc/ifunc.exp

@@ -777,6 +777,20 @@ run_ld_link_exec_tests [list \
 	"pass.out" \
 	"-fPIE -O2 -g" \
     ] \
-]}
+]
+if { $STATIC_PIE_LDFLAGS != "" } then {
+    run_ld_link_exec_tests [list \
+	[list \
+	    "Run pr23169g" \
+	    "$STATIC_PIE_LDFLAGS" \
+	    "" \
+	    { pr23169a.c pr23169b.c pr23169c.c } \
+	    "pr23169g" \
+	    "pass.out" \
+	    "-fPIE -O2 -g" \
+	] \
+]
+}
+}
 
 set ASFLAGS "$saved_ASFLAGS"