x86-64: Verify that _dl_runtime_resolve preserves vector registers

On x86-64, _dl_runtime_resolve must preserve the first 8 vector
registers.  Add 3 _dl_runtime_resolve tests to verify that SSE,
AVX and AVX512 registers are preserved.

	* sysdeps/x86_64/Makefile (tests): Add tst-sse, tst-avx and
	tst-avx512.
	(test-extras): Add tst-avx-aux and tst-avx512-aux.
	(extra-test-objs): Add tst-avx-aux.o and tst-avx512-aux.o.
	(modules-names): Add tst-ssemod, tst-avxmod and tst-avx512mod.
	($(objpfx)tst-sse): New rule.
	($(objpfx)tst-avx): Likewise.
	($(objpfx)tst-avx512): Likewise.
	(CFLAGS-tst-avx-aux.c): New.
	(CFLAGS-tst-avxmod.c): Likewise.
	(CFLAGS-tst-avx512-aux.c): Likewise.
	(CFLAGS-tst-avx512mod.c): Likewise.
	* sysdeps/x86_64/tst-avx-aux.c: New file.
	* sysdeps/x86_64/tst-avx.c: Likewise.
	* sysdeps/x86_64/tst-avx512-aux.c: Likewise.
	* sysdeps/x86_64/tst-avx512.c: Likewise.
	* sysdeps/x86_64/tst-avx512mod.c: Likewise.
	* sysdeps/x86_64/tst-avxmod.c: Likewise.
	* sysdeps/x86_64/tst-sse.c: Likewise.
	* sysdeps/x86_64/tst-ssemod.c: Likewise.

9 files changed, 405 insertions, 4 deletions

diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 5f25893dc9..5075c91277 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -52,9 +52,12 @@ $(objpfx)tst-quad2pie: $(objpfx)tst-quadmod2pie.o
 CFLAGS-tst-quad1pie.c = $(PIE-ccflag)
 CFLAGS-tst-quad2pie.c = $(PIE-ccflag)
 
-tests += tst-audit3 tst-audit4 tst-audit5 tst-audit6 tst-audit7 tst-audit10
-test-extras += tst-audit4-aux tst-audit10-aux
-extra-test-objs += tst-audit4-aux.o tst-audit10-aux.o
+tests += tst-audit3 tst-audit4 tst-audit5 tst-audit6 tst-audit7 \
+	 tst-audit10 tst-sse tst-avx tst-avx512
+test-extras += tst-audit4-aux tst-audit10-aux \
+	       tst-avx-aux tst-avx512-aux
+extra-test-objs += tst-audit4-aux.o tst-audit10-aux.o \
+		   tst-avx-aux.o tst-avx512-aux.o
 
 tests += tst-split-dynreloc
 LDFLAGS-tst-split-dynreloc = -Wl,-T,$(..)sysdeps/x86_64/tst-split-dynreloc.lds
@@ -65,7 +68,8 @@ modules-names += tst-auditmod3a tst-auditmod3b \
 		tst-auditmod5a tst-auditmod5b \
 		tst-auditmod6a tst-auditmod6b tst-auditmod6c \
 		tst-auditmod7a tst-auditmod7b \
-		tst-auditmod10a tst-auditmod10b
+		tst-auditmod10a tst-auditmod10b \
+		tst-ssemod tst-avxmod tst-avx512mod
 
 $(objpfx)tst-audit3: $(objpfx)tst-auditmod3a.so
 $(objpfx)tst-audit3.out: $(objpfx)tst-auditmod3b.so
@@ -92,6 +96,10 @@ $(objpfx)tst-audit10: $(objpfx)tst-audit10-aux.o $(objpfx)tst-auditmod10a.so
 $(objpfx)tst-audit10.out: $(objpfx)tst-auditmod10b.so
 tst-audit10-ENV = LD_AUDIT=$(objpfx)tst-auditmod10b.so
 
+$(objpfx)tst-sse: $(objpfx)tst-ssemod.so
+$(objpfx)tst-avx: $(objpfx)tst-avx-aux.o $(objpfx)tst-avxmod.so
+$(objpfx)tst-avx512: $(objpfx)tst-avx512-aux.o $(objpfx)tst-avx512mod.so
+
 AVX-CFLAGS=-mavx -mno-vzeroupper
 CFLAGS-tst-audit4-aux.c += $(AVX-CFLAGS)
 CFLAGS-tst-auditmod4a.c += $(AVX-CFLAGS)
@@ -99,11 +107,15 @@ CFLAGS-tst-auditmod4b.c += $(AVX-CFLAGS)
 CFLAGS-tst-auditmod6b.c += $(AVX-CFLAGS)
 CFLAGS-tst-auditmod6c.c += $(AVX-CFLAGS)
 CFLAGS-tst-auditmod7b.c += $(AVX-CFLAGS)
+CFLAGS-tst-avx-aux.c += $(AVX-CFLAGS)
+CFLAGS-tst-avxmod.c += $(AVX-CFLAGS)
 ifeq (yes,$(config-cflags-avx512))
 AVX512-CFLAGS = -mavx512f
 CFLAGS-tst-audit10-aux.c += $(AVX512-CFLAGS)
 CFLAGS-tst-auditmod10a.c += $(AVX512-CFLAGS)
 CFLAGS-tst-auditmod10b.c += $(AVX512-CFLAGS)
+CFLAGS-tst-avx512-aux.c += $(AVX512-CFLAGS)
+CFLAGS-tst-avx512mod.c += $(AVX512-CFLAGS)
 endif
 endif
 
diff --git a/sysdeps/x86_64/tst-avx-aux.c b/sysdeps/x86_64/tst-avx-aux.c
new file mode 100644
index 0000000000..e3807de7bb
--- /dev/null
+++ b/sysdeps/x86_64/tst-avx-aux.c
@@ -0,0 +1,47 @@
+/* Test case for preserved AVX registers in dynamic linker, -mavx part.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <immintrin.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+tst_avx_aux (void)
+{
+#ifdef __AVX__
+  extern __m256i avx_test (__m256i, __m256i, __m256i, __m256i,
+			   __m256i, __m256i, __m256i, __m256i);
+
+  __m256i ymm0 = _mm256_set1_epi32 (0);
+  __m256i ymm1 = _mm256_set1_epi32 (1);
+  __m256i ymm2 = _mm256_set1_epi32 (2);
+  __m256i ymm3 = _mm256_set1_epi32 (3);
+  __m256i ymm4 = _mm256_set1_epi32 (4);
+  __m256i ymm5 = _mm256_set1_epi32 (5);
+  __m256i ymm6 = _mm256_set1_epi32 (6);
+  __m256i ymm7 = _mm256_set1_epi32 (7);
+  __m256i ret = avx_test (ymm0, ymm1, ymm2, ymm3,
+			  ymm4, ymm5, ymm6, ymm7);
+  ymm0 =  _mm256_set1_epi32 (0x12349876);
+  if (memcmp (&ymm0, &ret, sizeof (ret)))
+    abort ();
+  return 0;
+#else  /* __AVX__ */
+  return 77;
+#endif  /* __AVX__ */
+}
diff --git a/sysdeps/x86_64/tst-avx.c b/sysdeps/x86_64/tst-avx.c
new file mode 100644
index 0000000000..ec2e3a79ff
--- /dev/null
+++ b/sysdeps/x86_64/tst-avx.c
@@ -0,0 +1,49 @@
+/* Test case for preserved AVX registers in dynamic linker.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <cpuid.h>
+
+int tst_avx_aux (void);
+
+static int
+avx_enabled (void)
+{
+  unsigned int eax, ebx, ecx, edx;
+
+  if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0
+      || (ecx & (bit_AVX | bit_OSXSAVE)) != (bit_AVX | bit_OSXSAVE))
+    return 0;
+
+  /* Check the OS has AVX and SSE saving enabled.  */
+  asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
+
+  return (eax & 6) == 6;
+}
+
+static int
+do_test (void)
+{
+  /* Run AVX test only if AVX is supported.  */
+  if (avx_enabled ())
+    return tst_avx_aux ();
+  else
+    return 77;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../../test-skeleton.c"
diff --git a/sysdeps/x86_64/tst-avx512-aux.c b/sysdeps/x86_64/tst-avx512-aux.c
new file mode 100644
index 0000000000..6cebc523f2
--- /dev/null
+++ b/sysdeps/x86_64/tst-avx512-aux.c
@@ -0,0 +1,48 @@
+/* Test case for preserved AVX512 registers in dynamic linker,
+   -mavx512 part.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <immintrin.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+tst_avx512_aux (void)
+{
+#ifdef __AVX512F__
+  extern __m512i avx512_test (__m512i, __m512i, __m512i, __m512i,
+			      __m512i, __m512i, __m512i, __m512i);
+
+  __m512i zmm0 = _mm512_set1_epi32 (0);
+  __m512i zmm1 = _mm512_set1_epi32 (1);
+  __m512i zmm2 = _mm512_set1_epi32 (2);
+  __m512i zmm3 = _mm512_set1_epi32 (3);
+  __m512i zmm4 = _mm512_set1_epi32 (4);
+  __m512i zmm5 = _mm512_set1_epi32 (5);
+  __m512i zmm6 = _mm512_set1_epi32 (6);
+  __m512i zmm7 = _mm512_set1_epi32 (7);
+  __m512i ret = avx512_test (zmm0, zmm1, zmm2, zmm3,
+			     zmm4, zmm5, zmm6, zmm7);
+  zmm0 =  _mm512_set1_epi32 (0x12349876);
+  if (memcmp (&zmm0, &ret, sizeof (ret)))
+    abort ();
+  return 0;
+#else  /* __AVX512F__ */
+  return 77;
+#endif  /* __AVX512F__ */
+}
diff --git a/sysdeps/x86_64/tst-avx512.c b/sysdeps/x86_64/tst-avx512.c
new file mode 100644
index 0000000000..a8e42ef553
--- /dev/null
+++ b/sysdeps/x86_64/tst-avx512.c
@@ -0,0 +1,57 @@
+/* Test case for preserved AVX512 registers in dynamic linker.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <cpuid.h>
+
+int tst_avx512_aux (void);
+
+static int
+avx512_enabled (void)
+{
+#ifdef bit_AVX512F
+  unsigned int eax, ebx, ecx, edx;
+
+  if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0
+      || (ecx & (bit_AVX | bit_OSXSAVE)) != (bit_AVX | bit_OSXSAVE))
+    return 0;
+
+  __cpuid_count (7, 0, eax, ebx, ecx, edx);
+  if (!(ebx & bit_AVX512F))
+    return 0;
+
+  asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
+
+  /* Verify that ZMM, YMM and XMM states are enabled.  */
+  return (eax & 0xe6) == 0xe6;
+#else
+  return 0;
+#endif
+}
+
+static int
+do_test (void)
+{
+  /* Run AVX512 test only if AVX512 is supported.  */
+  if (avx512_enabled ())
+    return tst_avx512_aux ();
+  else
+    return 77;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../../test-skeleton.c"
diff --git a/sysdeps/x86_64/tst-avx512mod.c b/sysdeps/x86_64/tst-avx512mod.c
new file mode 100644
index 0000000000..4cfb3a2c3d
--- /dev/null
+++ b/sysdeps/x86_64/tst-avx512mod.c
@@ -0,0 +1,48 @@
+/* Test case for x86-64 preserved AVX512 registers in dynamic linker.  */
+
+#ifdef __AVX512F__
+#include <stdlib.h>
+#include <string.h>
+#include <immintrin.h>
+
+__m512i
+avx512_test (__m512i x0, __m512i x1, __m512i x2, __m512i x3,
+	     __m512i x4, __m512i x5, __m512i x6, __m512i x7)
+{
+  __m512i zmm;
+
+  zmm = _mm512_set1_epi32 (0);
+  if (memcmp (&zmm, &x0, sizeof (zmm)))
+    abort ();
+
+  zmm = _mm512_set1_epi32 (1);
+  if (memcmp (&zmm, &x1, sizeof (zmm)))
+    abort ();
+
+  zmm = _mm512_set1_epi32 (2);
+  if (memcmp (&zmm, &x2, sizeof (zmm)))
+    abort ();
+
+  zmm = _mm512_set1_epi32 (3);
+  if (memcmp (&zmm, &x3, sizeof (zmm)))
+    abort ();
+
+  zmm = _mm512_set1_epi32 (4);
+  if (memcmp (&zmm, &x4, sizeof (zmm)))
+    abort ();
+
+  zmm = _mm512_set1_epi32 (5);
+  if (memcmp (&zmm, &x5, sizeof (zmm)))
+    abort ();
+
+  zmm = _mm512_set1_epi32 (6);
+  if (memcmp (&zmm, &x6, sizeof (zmm)))
+    abort ();
+
+  zmm = _mm512_set1_epi32 (7);
+  if (memcmp (&zmm, &x7, sizeof (zmm)))
+    abort ();
+
+  return _mm512_set1_epi32 (0x12349876);
+}
+#endif
diff --git a/sysdeps/x86_64/tst-avxmod.c b/sysdeps/x86_64/tst-avxmod.c
new file mode 100644
index 0000000000..6e5b154997
--- /dev/null
+++ b/sysdeps/x86_64/tst-avxmod.c
@@ -0,0 +1,48 @@
+/* Test case for x86-64 preserved AVX registers in dynamic linker.  */
+
+#ifdef __AVX__
+#include <stdlib.h>
+#include <string.h>
+#include <immintrin.h>
+
+__m256i
+avx_test (__m256i x0, __m256i x1, __m256i x2, __m256i x3,
+	  __m256i x4, __m256i x5, __m256i x6, __m256i x7)
+{
+  __m256i ymm;
+
+  ymm = _mm256_set1_epi32 (0);
+  if (memcmp (&ymm, &x0, sizeof (ymm)))
+    abort ();
+
+  ymm = _mm256_set1_epi32 (1);
+  if (memcmp (&ymm, &x1, sizeof (ymm)))
+    abort ();
+
+  ymm = _mm256_set1_epi32 (2);
+  if (memcmp (&ymm, &x2, sizeof (ymm)))
+    abort ();
+
+  ymm = _mm256_set1_epi32 (3);
+  if (memcmp (&ymm, &x3, sizeof (ymm)))
+    abort ();
+
+  ymm = _mm256_set1_epi32 (4);
+  if (memcmp (&ymm, &x4, sizeof (ymm)))
+    abort ();
+
+  ymm = _mm256_set1_epi32 (5);
+  if (memcmp (&ymm, &x5, sizeof (ymm)))
+    abort ();
+
+  ymm = _mm256_set1_epi32 (6);
+  if (memcmp (&ymm, &x6, sizeof (ymm)))
+    abort ();
+
+  ymm = _mm256_set1_epi32 (7);
+  if (memcmp (&ymm, &x7, sizeof (ymm)))
+    abort ();
+
+  return _mm256_set1_epi32 (0x12349876);
+}
+#endif
diff --git a/sysdeps/x86_64/tst-sse.c b/sysdeps/x86_64/tst-sse.c
new file mode 100644
index 0000000000..dd1537cf27
--- /dev/null
+++ b/sysdeps/x86_64/tst-sse.c
@@ -0,0 +1,46 @@
+/* Test case for preserved SSE registers in dynamic linker.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <immintrin.h>
+#include <stdlib.h>
+#include <string.h>
+
+extern __m128i sse_test (__m128i, __m128i, __m128i, __m128i,
+			 __m128i, __m128i, __m128i, __m128i);
+
+static int
+do_test (void)
+{
+  __m128i xmm0 = _mm_set1_epi32 (0);
+  __m128i xmm1 = _mm_set1_epi32 (1);
+  __m128i xmm2 = _mm_set1_epi32 (2);
+  __m128i xmm3 = _mm_set1_epi32 (3);
+  __m128i xmm4 = _mm_set1_epi32 (4);
+  __m128i xmm5 = _mm_set1_epi32 (5);
+  __m128i xmm6 = _mm_set1_epi32 (6);
+  __m128i xmm7 = _mm_set1_epi32 (7);
+  __m128i ret = sse_test (xmm0, xmm1, xmm2, xmm3,
+			  xmm4, xmm5, xmm6, xmm7);
+  xmm0 =  _mm_set1_epi32 (0x12349876);
+  if (memcmp (&xmm0, &ret, sizeof (ret)))
+    abort ();
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../../test-skeleton.c"
diff --git a/sysdeps/x86_64/tst-ssemod.c b/sysdeps/x86_64/tst-ssemod.c
new file mode 100644
index 0000000000..907a64c69e
--- /dev/null
+++ b/sysdeps/x86_64/tst-ssemod.c
@@ -0,0 +1,46 @@
+/* Test case for x86-64 preserved SSE registers in dynamic linker.  */
+
+#include <stdlib.h>
+#include <string.h>
+#include <immintrin.h>
+
+__m128i
+sse_test (__m128i x0, __m128i x1, __m128i x2, __m128i x3,
+	  __m128i x4, __m128i x5, __m128i x6, __m128i x7)
+{
+  __m128i xmm;
+
+  xmm = _mm_set1_epi32 (0);
+  if (memcmp (&xmm, &x0, sizeof (xmm)))
+    abort ();
+
+  xmm = _mm_set1_epi32 (1);
+  if (memcmp (&xmm, &x1, sizeof (xmm)))
+    abort ();
+
+  xmm = _mm_set1_epi32 (2);
+  if (memcmp (&xmm, &x2, sizeof (xmm)))
+    abort ();
+
+  xmm = _mm_set1_epi32 (3);
+  if (memcmp (&xmm, &x3, sizeof (xmm)))
+    abort ();
+
+  xmm = _mm_set1_epi32 (4);
+  if (memcmp (&xmm, &x4, sizeof (xmm)))
+    abort ();
+
+  xmm = _mm_set1_epi32 (5);
+  if (memcmp (&xmm, &x5, sizeof (xmm)))
+    abort ();
+
+  xmm = _mm_set1_epi32 (6);
+  if (memcmp (&xmm, &x6, sizeof (xmm)))
+    abort ();
+
+  xmm = _mm_set1_epi32 (7);
+  if (memcmp (&xmm, &x7, sizeof (xmm)))
+    abort ();
+
+  return _mm_set1_epi32 (0x12349876);
+}