commit 2376944b9e5c0364b9fb473e4d8dabca31b57167

Author: Stefan Liebler <stli@linux.ibm.com>

Date:   Wed Apr 13 14:36:09 2022 +0200

    S390: Add new s390 platform z16.

    The new IBM z16 is added to platform string array.

    The macro _DL_PLATFORMS_COUNT is incremented.

    _dl_hwcaps_subdir is extended by "z16" if HWCAP_S390_VXRS_PDE2

    is set. HWCAP_S390_NNPA is not tested in _dl_hwcaps_subdirs_active

    as those instructions may be replaced or removed in future.

    tst-glibc-hwcaps.c is extended in order to test z16 via new marker5.

    A fatal glibc error is dumped if glibc was build with architecture

    level set for z16, but run on an older machine. (See dl-hwcap-check.h)

Reworked for RHEL 8.7.0

diff -Nrup a/elf/Makefile b/elf/Makefile

--- a/elf/Makefile	2022-05-16 21:48:11.267916411 -0400

+++ b/elf/Makefile	2022-05-16 21:48:56.106095151 -0400

@@ -347,7 +347,8 @@ modules-names = testobj1 testobj2 testob

 		libmarkermod2-1 libmarkermod2-2 \

 		libmarkermod3-1 libmarkermod3-2 libmarkermod3-3 \

 		libmarkermod4-1 libmarkermod4-2 libmarkermod4-3 libmarkermod4-4 \

-		tst-tls20mod-bad tst-tls21mod \

+		libmarkermod5-1 libmarkermod5-2 libmarkermod5-3 libmarkermod5-4 \

+		libmarkermod5-5 tst-tls20mod-bad tst-tls21mod \

 # Most modules build with _ISOMAC defined, but those filtered out

 # depend on internal headers.

@@ -1782,6 +1783,7 @@ LDFLAGS-libmarkermod1-1.so += -Wl,-sonam

 LDFLAGS-libmarkermod2-1.so += -Wl,-soname,libmarkermod2.so

 LDFLAGS-libmarkermod3-1.so += -Wl,-soname,libmarkermod3.so

 LDFLAGS-libmarkermod4-1.so += -Wl,-soname,libmarkermod4.so

+LDFLAGS-libmarkermod5-1.so += -Wl,-soname,libmarkermod5.so

 $(objpfx)libmarkermod%.os : markermodMARKER-VALUE.c

 	$(compile-command.c) \

 	  -DMARKER=marker$(firstword $(subst -, ,$*)) \

@@ -1794,6 +1796,8 @@ $(objpfx)libmarkermod3.so: $(objpfx)libm

 	cp $< $@

 $(objpfx)libmarkermod4.so: $(objpfx)libmarkermod4-1.so

 	cp $< $@

+$(objpfx)libmarkermod5.so: $(objpfx)libmarkermod5-1.so

+	cp $< $@

 # tst-glibc-hwcaps-prepend checks that --glibc-hwcaps-prepend is

 # preferred over auto-detected subdirectories.

diff -Nrup a/elf/tst-glibc-hwcaps-cache.script b/elf/tst-glibc-hwcaps-cache.script

--- a/elf/tst-glibc-hwcaps-cache.script	2022-05-16 21:48:11.053915558 -0400

+++ b/elf/tst-glibc-hwcaps-cache.script	2022-05-16 21:48:56.107095155 -0400

@@ -4,6 +4,7 @@

 cp $B/elf/libmarkermod2-1.so $L/libmarkermod2.so

 cp $B/elf/libmarkermod3-1.so $L/libmarkermod3.so

 cp $B/elf/libmarkermod4-1.so $L/libmarkermod4.so

+cp $B/elf/libmarkermod5-1.so $L/libmarkermod5.so

 mkdirp 0770 $L/glibc-hwcaps/power9

 cp $B/elf/libmarkermod2-2.so $L/glibc-hwcaps/power9/libmarkermod2.so

@@ -20,6 +21,11 @@ mkdirp 0770 $L/glibc-hwcaps/z15

 cp $B/elf/libmarkermod4-2.so $L/glibc-hwcaps/z13/libmarkermod4.so

 cp $B/elf/libmarkermod4-3.so $L/glibc-hwcaps/z14/libmarkermod4.so

 cp $B/elf/libmarkermod4-4.so $L/glibc-hwcaps/z15/libmarkermod4.so

+mkdirp 0770 $L/glibc-hwcaps/z16

+cp $B/elf/libmarkermod5-2.so $L/glibc-hwcaps/z13/libmarkermod5.so

+cp $B/elf/libmarkermod5-3.so $L/glibc-hwcaps/z14/libmarkermod5.so

+cp $B/elf/libmarkermod5-4.so $L/glibc-hwcaps/z15/libmarkermod5.so

+cp $B/elf/libmarkermod5-5.so $L/glibc-hwcaps/z16/libmarkermod5.so

 mkdirp 0770 $L/glibc-hwcaps/x86-64-v2

 cp $B/elf/libmarkermod2-2.so $L/glibc-hwcaps/x86-64-v2/libmarkermod2.so

diff -Nrup a/sysdeps/s390/dl-procinfo.c b/sysdeps/s390/dl-procinfo.c

--- a/sysdeps/s390/dl-procinfo.c	2022-05-16 21:48:11.250916343 -0400

+++ b/sysdeps/s390/dl-procinfo.c	2022-05-16 21:48:56.107095155 -0400

@@ -64,11 +64,12 @@ PROCINFO_CLASS const char _dl_s390_cap_f

 #if !defined PROCINFO_DECL && defined SHARED

   ._dl_s390_platforms

 #else

-PROCINFO_CLASS const char _dl_s390_platforms[10][7]

+PROCINFO_CLASS const char _dl_s390_platforms[11][7]

 #endif

 #ifndef PROCINFO_DECL

 = {

-    "g5", "z900", "z990", "z9-109", "z10", "z196", "zEC12", "z13", "z14", "z15"

+    "g5", "z900", "z990", "z9-109", "z10", "z196", "zEC12", "z13", "z14", "z15",

+    "z16"

   }

 #endif

 #if !defined SHARED || defined PROCINFO_DECL

diff -Nrup a/sysdeps/s390/dl-procinfo.h b/sysdeps/s390/dl-procinfo.h

--- a/sysdeps/s390/dl-procinfo.h	2022-05-16 21:48:11.250916343 -0400

+++ b/sysdeps/s390/dl-procinfo.h	2022-05-16 21:48:56.107095155 -0400

@@ -23,7 +23,7 @@

 #define _DL_HWCAP_COUNT 23

-#define _DL_PLATFORMS_COUNT	10

+#define _DL_PLATFORMS_COUNT	11

 /* The kernel provides up to 32 capability bits with elf_hwcap.  */

 #define _DL_FIRST_PLATFORM	32

diff -Nrup a/sysdeps/s390/s390-64/dl-hwcaps-subdirs.c b/sysdeps/s390/s390-64/dl-hwcaps-subdirs.c

--- a/sysdeps/s390/s390-64/dl-hwcaps-subdirs.c	2022-05-16 21:48:11.053915558 -0400

+++ b/sysdeps/s390/s390-64/dl-hwcaps-subdirs.c	2022-05-16 21:58:02.840301911 -0400

@@ -19,8 +19,8 @@

 #include <dl-hwcaps.h>

 #include <ldsodefs.h>

-const char _dl_hwcaps_subdirs[] = "z15:z14:z13";

-enum { subdirs_count = 3 }; /* Number of components in _dl_hwcaps_subdirs.  */

+const char _dl_hwcaps_subdirs[] = "z16:z15:z14:z13";

+enum { subdirs_count = 4 }; /* Number of components in _dl_hwcaps_subdirs.  */

 uint32_t

 _dl_hwcaps_subdirs_active (void)

@@ -50,5 +50,12 @@ _dl_hwcaps_subdirs_active (void)

     return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);

   ++active;

+  /* z16.

+   Note: We do not list HWCAP_S390_NNPA here as, according to the Principles of

+   Operation, those instructions may be replaced or removed in future.  */

+  if (!(GLRO (dl_hwcap) & HWCAP_S390_VXRS_PDE2))

+    return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);

+  ++active;

+

   return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);

 }

diff -Nrup a/sysdeps/s390/s390-64/Makefile b/sysdeps/s390/s390-64/Makefile

--- a/sysdeps/s390/s390-64/Makefile	2022-05-16 21:48:11.053915558 -0400

+++ b/sysdeps/s390/s390-64/Makefile	2022-05-16 21:54:08.832355745 -0400

@@ -7,8 +7,11 @@ CFLAGS-rtld.c += -Wno-uninitialized -Wno

 CFLAGS-dl-load.c += -Wno-unused

 CFLAGS-dl-reloc.c += -Wno-unused

-$(objpfx)tst-glibc-hwcaps: $(objpfx)libmarkermod2-1.so \

-  $(objpfx)libmarkermod3-1.so $(objpfx)libmarkermod4-1.so

+$(objpfx)tst-glibc-hwcaps: \

+    $(objpfx)libmarkermod2-1.so \

+    $(objpfx)libmarkermod3-1.so \

+    $(objpfx)libmarkermod4-1.so \

+    $(objpfx)libmarkermod5-1.so

 $(objpfx)tst-glibc-hwcaps.out: \

   $(objpfx)libmarkermod2.so \

     $(objpfx)glibc-hwcaps/z13/libmarkermod2.so \

@@ -19,6 +22,11 @@ $(objpfx)tst-glibc-hwcaps.out: \

     $(objpfx)glibc-hwcaps/z13/libmarkermod4.so \

     $(objpfx)glibc-hwcaps/z14/libmarkermod4.so \

     $(objpfx)glibc-hwcaps/z15/libmarkermod4.so \

+  $(objpfx)libmarkermod5.so \

+    $(objpfx)glibc-hwcaps/z13/libmarkermod5.so \

+    $(objpfx)glibc-hwcaps/z14/libmarkermod5.so \

+    $(objpfx)glibc-hwcaps/z15/libmarkermod5.so \

+    $(objpfx)glibc-hwcaps/z16/libmarkermod5.so

 $(objpfx)glibc-hwcaps/z13/libmarkermod2.so: $(objpfx)libmarkermod2-2.so

 	$(make-target-directory)

@@ -38,6 +46,18 @@ $(objpfx)glibc-hwcaps/z14/libmarkermod4.

 $(objpfx)glibc-hwcaps/z15/libmarkermod4.so: $(objpfx)libmarkermod4-4.so

 	$(make-target-directory)

 	cp $< $@

+$(objpfx)glibc-hwcaps/z13/libmarkermod5.so: $(objpfx)libmarkermod5-2.so

+	$(make-target-directory)

+	cp $< $@

+$(objpfx)glibc-hwcaps/z14/libmarkermod5.so: $(objpfx)libmarkermod5-3.so

+	$(make-target-directory)

+	cp $< $@

+$(objpfx)glibc-hwcaps/z15/libmarkermod5.so: $(objpfx)libmarkermod5-4.so

+	$(make-target-directory)

+	cp $< $@

+$(objpfx)glibc-hwcaps/z16/libmarkermod5.so: $(objpfx)libmarkermod5-5.so

+	$(make-target-directory)

+	cp $< $@

 ifeq (no,$(build-hardcoded-path-in-tests))

 # This is an ld.so.cache test, and RPATH/RUNPATH in the executable

diff -Nrup a/sysdeps/s390/s390-64/tst-glibc-hwcaps.c b/sysdeps/s390/s390-64/tst-glibc-hwcaps.c

--- a/sysdeps/s390/s390-64/tst-glibc-hwcaps.c	2022-05-16 21:48:11.053915558 -0400

+++ b/sysdeps/s390/s390-64/tst-glibc-hwcaps.c	2022-05-16 21:48:56.107095155 -0400

@@ -25,6 +25,7 @@

 extern int marker2 (void);

 extern int marker3 (void);

 extern int marker4 (void);

+extern int marker5 (void);

 /* Return the arch level, 10 for the baseline libmarkermod*.so's.  */

 static int

@@ -63,9 +64,13 @@ compute_level (void)

     return 12;

   if (strcmp (platform, "z15") == 0)

     return 13;

+  if (strcmp (platform, "z16") == 0)

+    return 14;

   printf ("warning: unrecognized AT_PLATFORM value: %s\n", platform);

   /* Assume that the new platform supports z15.  */

   return 13;

+  /* Assume that the new platform supports z16.  */

+  return 14;

 }

 static int

@@ -76,6 +81,7 @@ do_test (void)

   TEST_COMPARE (marker2 (), MIN (level - 9, 2));

   TEST_COMPARE (marker3 (), MIN (level - 9, 3));

   TEST_COMPARE (marker4 (), MIN (level - 9, 4));

+  TEST_COMPARE (marker5 (), MIN (level - 9, 5));

   return 0;

 }