[PATCH] Fix various tests to use -no-pie linker flag when needed

[Jan Vrany <jan dot vrany at fit dot cvut dot cz>]

Various test use test code written in i385 / x86_64 assembly that cannot
be used to create PIE executables. Therefore compilation of test programs
failed on systems where the compiler default is to create PIE executable.

To fix this, force -no-pie linker flag.

gdb/testsuite/ChangeLog:
2018-08-28  Jan Vrany  <jan.vrany@fit.cvut.cz>

	* gdb.arch/amd64-disp-step.exp: Use -no-pie linker flag
	to enforce non-PIE executable.
	* gdb.arch/amd64-entry-value.exp: Likewise.
	* gdb.arch/amd64-invalid-stack-middle.exp: Likewise.
	* gdb.arch/i386-float.exp: Likewise.
	* gdb.arch/i386-signal.exp: Likewise.
	* gdb.mi/mi-reg-undefined.exp: Likewise.
---
 gdb/testsuite/ChangeLog                               | 10 ++++++++++
 gdb/testsuite/gdb.arch/amd64-disp-step.exp            |  3 ++-
 gdb/testsuite/gdb.arch/amd64-entry-value.exp          |  2 +-
 gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp |  3 ++-
 gdb/testsuite/gdb.arch/i386-float.exp                 |  2 +-
 gdb/testsuite/gdb.arch/i386-signal.exp                |  2 +-
 gdb/testsuite/gdb.mi/mi-reg-undefined.exp             |  2 +-
 7 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 6b5275a4cb..409843ff27 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,13 @@
+2018-08-28  Jan Vrany  <jan.vrany@fit.cvut.cz>
+
+	* gdb.arch/amd64-disp-step.exp: Use -no-pie linker flag
+	to enforce non-PIE executable.
+	* gdb.arch/amd64-entry-value.exp: Likewise.
+	* gdb.arch/amd64-invalid-stack-middle.exp: Likewise.
+	* gdb.arch/i386-float.exp: Likewise.
+	* gdb.arch/i386-signal.exp: Likewise.
+	* gdb.mi/mi-reg-undefined.exp: Likewise.
+
 2018-08-23  Kevin Buettner  <kevinb@redhat.com>
 
 	* gdb.dwarf2/dw2-ranges-func.c: New file.
diff --git a/gdb/testsuite/gdb.arch/amd64-disp-step.exp b/gdb/testsuite/gdb.arch/amd64-disp-step.exp
index 782b75896c..8ddd48a1e8 100644
--- a/gdb/testsuite/gdb.arch/amd64-disp-step.exp
+++ b/gdb/testsuite/gdb.arch/amd64-disp-step.exp
@@ -25,9 +25,10 @@ if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
 
 set newline "\[\r\n\]*"
 
+set opts {ldflags=-no-pie}
 standard_testfile .S
 
-if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
+if { [prepare_for_testing "failed to prepare" $testfile $srcfile $opts] } {
     return -1
 }
 
diff --git a/gdb/testsuite/gdb.arch/amd64-entry-value.exp b/gdb/testsuite/gdb.arch/amd64-entry-value.exp
index 72700d55c2..eeb22c8066 100644
--- a/gdb/testsuite/gdb.arch/amd64-entry-value.exp
+++ b/gdb/testsuite/gdb.arch/amd64-entry-value.exp
@@ -14,7 +14,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 standard_testfile .s
-set opts {}
+set opts {ldflags=-no-pie}
 
 if [info exists COMPILE] {
     # make check RUNTESTFLAGS="gdb.arch/amd64-entry-value.exp COMPILE=1"
diff --git a/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp
index c00bfa10bd..b63fec9a1f 100644
--- a/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp
+++ b/gdb/testsuite/gdb.arch/amd64-invalid-stack-middle.exp
@@ -27,7 +27,8 @@
 # run twice, and we restart gdb before testing each different command to
 # ensure that nothing is being cached.
 
-set opts {}
+set opts {ldflags=-no-pie}
+
 standard_testfile .S
 
 if { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
diff --git a/gdb/testsuite/gdb.arch/i386-float.exp b/gdb/testsuite/gdb.arch/i386-float.exp
index 87c90c372e..3fccf5e81b 100644
--- a/gdb/testsuite/gdb.arch/i386-float.exp
+++ b/gdb/testsuite/gdb.arch/i386-float.exp
@@ -28,7 +28,7 @@ standard_testfile .S
 # some targets have leading underscores on assembly symbols.
 set additional_flags [gdb_target_symbol_prefix_flags_asm]
 
-if { [prepare_for_testing "failed to prepare" $testfile $srcfile [list debug $additional_flags]] } {
+if { [prepare_for_testing "failed to prepare" $testfile $srcfile [list debug ldflags=-no-pie $additional_flags]] } {
     return -1
 }
 
diff --git a/gdb/testsuite/gdb.arch/i386-signal.exp b/gdb/testsuite/gdb.arch/i386-signal.exp
index 38046a13cb..a046c06c9d 100644
--- a/gdb/testsuite/gdb.arch/i386-signal.exp
+++ b/gdb/testsuite/gdb.arch/i386-signal.exp
@@ -23,7 +23,7 @@ if { ![istarget "i?86-*-*"] && ![istarget "x86_64-*-*"] } then {
 standard_testfile
 
 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
-	  executable { debug }] != "" } {
+	  executable { debug ldflags=-no-pie }] != "" } {
     untested "failed to compile"
     return -1
 }
diff --git a/gdb/testsuite/gdb.mi/mi-reg-undefined.exp b/gdb/testsuite/gdb.mi/mi-reg-undefined.exp
index 83abab1a0e..bc560ad9e5 100644
--- a/gdb/testsuite/gdb.mi/mi-reg-undefined.exp
+++ b/gdb/testsuite/gdb.mi/mi-reg-undefined.exp
@@ -33,7 +33,7 @@ if [mi_gdb_start] {
 
 standard_testfile .S
 
-if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug ldflags=-no-pie}] != "" } {
      untested "failed to compile"
      return -1
 }
-- 
2.18.0