backport patch from glibc upstream 2.38 branch.

here is the bugfix:
- x86_64: Optimize ffsll function code size
- S390: Fix building with disable mutli arch (BZ 31196)
- sparc: Fix broken memset for sparc32 (BZ 31068)
- sparc: Remove unwind information from signal return
- sparc: Fix sparc64 memmove length comparison (BZ 31266)
- sparc: Remove unwind information from signal return stubs (BZ 31244)

S390-Fix-building-with-disable-mutli-arch-BZ-31196.patch

@@ -0,0 +1,66 @@
+From 18876c9ff52c3d9aefe2c663b1a287589bebedc0 Mon Sep 17 00:00:00 2001
+From: Stefan Liebler <stli@linux.ibm.com>
+Date: Tue, 30 Jan 2024 09:34:32 +0100
+Subject: [PATCH 2/6] S390: Fix building with --disable-mutli-arch [BZ #31196]
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Starting with commits
+- 7ea510127e2067efa07865158ac92c330c379950
+string: Add libc_hidden_proto for strchrnul
+- 22999b2f0fb62eed1af4095d062bd1272d6afeb1
+string: Add libc_hidden_proto for memrchr
+
+building glibc on s390x with --disable-multi-arch fails if only
+the C-variant of strchrnul / memrchr is used.  This is the case
+if gcc uses -march < z13.
+
+The build fails with:
+../sysdeps/s390/strchrnul-c.c:28:49: error: ‘__strchrnul_c’ undeclared here (not in a function); did you mean ‘__strchrnul’?
+   28 | __hidden_ver1 (__strchrnul_c, __GI___strchrnul, __strchrnul_c);
+
+With --disable-multi-arch, __strchrnul_c is not available as string/strchrnul.c
+is just included without defining STRCHRNUL and thus we also don't have to create
+the internal hidden symbol.
+
+Tested-by: Andreas K. Hüttel <dilfridge@gentoo.org>
+(cherry picked from commit cc1b91eabd806057aa7e3058a84bf129ed36e157)
+---
+ sysdeps/s390/memrchr-c.c   | 4 +++-
+ sysdeps/s390/strchrnul-c.c | 4 +++-
+ 2 files changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/sysdeps/s390/memrchr-c.c b/sysdeps/s390/memrchr-c.c
+index bdf3c7bbe0..fadd63087a 100644
+--- a/sysdeps/s390/memrchr-c.c
++++ b/sysdeps/s390/memrchr-c.c
+@@ -25,7 +25,9 @@
+ 
+ # include <string/memrchr.c>
+ 
+-# if defined SHARED && IS_IN (libc)
++# if HAVE_MEMRCHR_IFUNC
++#  if defined SHARED && IS_IN (libc)
+ __hidden_ver1 (__memrchr_c, __GI___memrchr, __memrchr_c);
++#  endif
+ # endif
+ #endif
+diff --git a/sysdeps/s390/strchrnul-c.c b/sysdeps/s390/strchrnul-c.c
+index f6f5bae311..97fbc16edb 100644
+--- a/sysdeps/s390/strchrnul-c.c
++++ b/sysdeps/s390/strchrnul-c.c
+@@ -24,7 +24,9 @@
+ # endif
+ 
+ # include <string/strchrnul.c>
+-# if defined SHARED && IS_IN (libc)
++# if HAVE_STRCHRNUL_IFUNC
++#  if defined SHARED && IS_IN (libc)
+ __hidden_ver1 (__strchrnul_c, __GI___strchrnul, __strchrnul_c);
++#  endif
+ # endif
+ #endif
+-- 
+2.33.0
+

glibc.spec

@@ -67,7 +67,7 @@
 ##############################################################################
 Name: 	 	glibc
 Version: 	2.38
-Release: 	19
+Release: 	20
 Summary: 	The GNU libc libraries
 License:	%{all_license}
 URL: 		http://www.gnu.org/software/glibc/
@@ -133,6 +133,12 @@ Patch44: malloc-Improve-MAP_HUGETLB-with-glibc.malloc.hugetlb.patch
 Patch45: 0001-syslog-Fix-heap-buffer-overflow-in-__vsyslog_interna.patch
 Patch46: 0002-syslog-Fix-heap-buffer-overflow-in-__vsyslog_interna.patch
 Patch47: 0003-syslog-Fix-integer-overflow-in-__vsyslog_internal-CV.patch
+Patch48: x86_64-Optimize-ffsll-function-code-size.patch
+Patch49: S390-Fix-building-with-disable-mutli-arch-BZ-31196.patch
+Patch50: sparc-Fix-broken-memset-for-sparc32-BZ-31068.patch
+Patch51: sparc64-Remove-unwind-information-from-signal-return.patch
+Patch52: sparc-Fix-sparc64-memmove-length-comparison-BZ-31266.patch
+Patch53: sparc-Remove-unwind-information-from-signal-return-s.patch
 
 Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch
 Patch9001: locale-delete-no-hard-link-to-avoid-all_language-pac.patch 
@@ -1346,6 +1352,14 @@ fi
 %endif
 
 %changelog
+* Mon Feb 5 Qingqing Li <liqingqing3@huawei.com> - 2.38-20
+- x86_64: Optimize ffsll function code size
+- S390: Fix building with disable mutli arch (BZ 31196)
+- sparc: Fix broken memset for sparc32 (BZ 31068)
+- sparc: Remove unwind information from signal return
+- sparc: Fix sparc64 memmove length comparison (BZ 31266)
+- sparc: Remove unwind information from signal return stubs (BZ 31244)
+
 * Thu Feb 1 Hewenliang <hewenliang4@huawei.com> - 2.38-19
 - backport:fix CVE-2023-6779 CVE-2023-6780
 

sparc-Fix-broken-memset-for-sparc32-BZ-31068.patch

@@ -0,0 +1,43 @@
+From 6f68075869f6034f5fde3823741623d34164dc7d Mon Sep 17 00:00:00 2001
+From: Andreas Larsson <andreas@gaisler.com>
+Date: Wed, 15 Nov 2023 13:29:43 +0100
+Subject: [PATCH 3/6] sparc: Fix broken memset for sparc32 [BZ #31068]
+
+Fixes commit a61933fe27df ("sparc: Remove bzero optimization") that
+after moving code jumped to the wrong label 4.
+
+Verfied by successfully running string/test-memset on sparc32.
+
+Signed-off-by: Andreas Larsson <andreas@gaisler.com>
+Signed-off-by: Ludwig Rydberg <ludwig.rydberg@gaisler.com>
+Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+(cherry picked from commit 578190b7e43305141512dee777e4a3b3e8159393)
+---
+ sysdeps/sparc/sparc32/memset.S | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/sysdeps/sparc/sparc32/memset.S b/sysdeps/sparc/sparc32/memset.S
+index ca29ff5685..1dc3a640e8 100644
+--- a/sysdeps/sparc/sparc32/memset.S
++++ b/sysdeps/sparc/sparc32/memset.S
+@@ -55,7 +55,7 @@ ENTRY(memset)
+ 
+ 	andcc		%o0, 3, %o2
+ 	bne		3f
+-4:	 andcc		%o0, 4, %g0
++5:	 andcc		%o0, 4, %g0
+ 
+ 	be		2f
+ 	 mov		%g3, %g2
+@@ -139,7 +139,7 @@ ENTRY(memset)
+ 	stb		%g3, [%o0 + 0x02]
+ 2:	sub		%o2, 4, %o2
+ 	add		%o1, %o2, %o1
+-	b		4b
++	b		5b
+ 	 sub		%o0, %o2, %o0
+ END(memset)
+ libc_hidden_builtin_def (memset)
+-- 
+2.33.0
+

sparc-Fix-sparc64-memmove-length-comparison-BZ-31266.patch

@@ -0,0 +1,32 @@
+From aac57faf5425b472a72132b09f4b3a2aa1f77a63 Mon Sep 17 00:00:00 2001
+From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
+Date: Thu, 18 Jan 2024 10:52:18 -0300
+Subject: [PATCH 5/6] sparc: Fix sparc64 memmove length comparison (BZ 31266)
+
+The small counts copy bytes comparsion should be unsigned (as the
+memmove size argument).  It fixes string/tst-memmove-overflow on
+sparcv9, where the input size triggers an invalid code path.
+
+Checked on sparc64-linux-gnu and sparcv9-linux-gnu.
+
+(cherry picked from commit 926a4bdbb5fc8955570208b5571b2d04c6ffbd1d)
+---
+ sysdeps/sparc/sparc64/memmove.S | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/sysdeps/sparc/sparc64/memmove.S b/sysdeps/sparc/sparc64/memmove.S
+index db6f4f0e84..62b19ebc1b 100644
+--- a/sysdeps/sparc/sparc64/memmove.S
++++ b/sysdeps/sparc/sparc64/memmove.S
+@@ -38,7 +38,7 @@ ENTRY(memmove)
+ /*
+  * normal, copy forwards
+  */
+-2:	ble	%XCC, .Ldbytecp
++2:	bleu	%XCC, .Ldbytecp
+ 	 andcc	%o1, 3, %o5	/* is src word aligned  */
+ 	bz,pn	%icc, .Laldst
+ 	 cmp	%o5, 2		/* is src half-word aligned  */
+-- 
+2.33.0
+

sparc-Remove-unwind-information-from-signal-return-s.patch

@@ -0,0 +1,74 @@
+From 0c5e5bace57578ed3e28eb89ee2d2b31b74c4ecc Mon Sep 17 00:00:00 2001
+From: Daniel Cederman <cederman@gaisler.com>
+Date: Tue, 16 Jan 2024 09:31:41 +0100
+Subject: [PATCH 6/6] sparc: Remove unwind information from signal return stubs
+ [BZ #31244]
+
+The functions were previously written in C, but were not compiled
+with unwind information. The ENTRY/END macros includes .cfi_startproc
+and .cfi_endproc which adds unwind information. This caused the
+tests cleanup-8 and cleanup-10 in the GCC testsuite to fail.
+This patch adds a version of the ENTRY/END macros without the
+CFI instructions that can be used instead.
+
+sigaction registers a restorer address that is located two instructions
+before the stub function. This patch adds a two instruction padding to
+avoid that the unwinder accesses the unwind information from the function
+that the linker has placed right before it in memory. This fixes an issue
+with pthread_cancel that caused tst-mutex8-static (and other tests) to fail.
+
+Signed-off-by: Daniel Cederman <cederman@gaisler.com>
+Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+(cherry picked from commit 7bd06985c0a143cdcba2762bfe020e53514a53de)
+---
+ sysdeps/sparc/sysdep.h                                |  9 +++++++++
+ .../unix/sysv/linux/sparc/sparc32/sigreturn_stub.S    | 11 +++++++----
+ 2 files changed, 16 insertions(+), 4 deletions(-)
+
+diff --git a/sysdeps/sparc/sysdep.h b/sysdeps/sparc/sysdep.h
+index 687e626182..151baa5e10 100644
+--- a/sysdeps/sparc/sysdep.h
++++ b/sysdeps/sparc/sysdep.h
+@@ -76,6 +76,15 @@ C_LABEL(name)				\
+ 	cfi_endproc;			\
+ 	.size name, . - name
+ 
++#define ENTRY_NOCFI(name)			\
++	.align	4;			\
++	.global	C_SYMBOL_NAME(name);	\
++	.type	name, @function;	\
++C_LABEL(name)
++
++#define END_NOCFI(name)			\
++	.size name, . - name
++
+ #undef LOC
+ #define LOC(name)  .L##name
+ 
+diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sigreturn_stub.S b/sysdeps/unix/sysv/linux/sparc/sparc32/sigreturn_stub.S
+index cf509c8d5c..1962f9053c 100644
+--- a/sysdeps/unix/sysv/linux/sparc/sparc32/sigreturn_stub.S
++++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sigreturn_stub.S
+@@ -23,12 +23,15 @@
+ 
+    [1] https://lkml.org/lkml/2016/5/27/465  */
+ 
+-ENTRY (__rt_sigreturn_stub)
++	nop
++	nop
++
++ENTRY_NOCFI (__rt_sigreturn_stub)
+ 	mov	__NR_rt_sigreturn, %g1
+ 	ta	0x10
+-END (__rt_sigreturn_stub)
++END_NOCFI (__rt_sigreturn_stub)
+ 
+-ENTRY (__sigreturn_stub)
++ENTRY_NOCFI (__sigreturn_stub)
+ 	mov	__NR_sigreturn, %g1
+ 	ta	0x10
+-END (__sigreturn_stub)
++END_NOCFI (__sigreturn_stub)
+-- 
+2.33.0
+

sparc64-Remove-unwind-information-from-signal-return.patch

@@ -0,0 +1,42 @@
+From 0e383d2d4e7c08b36ad3edb30c072a3dc4d26ed8 Mon Sep 17 00:00:00 2001
+From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
+Date: Wed, 17 Jan 2024 10:38:09 -0300
+Subject: [PATCH 4/6] sparc64: Remove unwind information from signal return
+ stubs [BZ#31244]
+
+Similar to sparc32 fix, remove the unwind information on the signal
+return stubs.  This fixes the regressions:
+
+FAIL: nptl/tst-cancel24-static
+FAIL: nptl/tst-cond8-static
+FAIL: nptl/tst-mutex8-static
+FAIL: nptl/tst-mutexpi8-static
+FAIL: nptl/tst-mutexpi9
+
+On sparc64-linux-gnu.
+
+(cherry picked from commit 369efd817780276dbe0ecf8be6e1f354bdbc9857)
+---
+ sysdeps/unix/sysv/linux/sparc/sparc64/sigreturn_stub.S | 7 +++++--
+ 1 file changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/sigreturn_stub.S b/sysdeps/unix/sysv/linux/sparc/sparc64/sigreturn_stub.S
+index 7fac04f657..f089bcaf68 100644
+--- a/sysdeps/unix/sysv/linux/sparc/sparc64/sigreturn_stub.S
++++ b/sysdeps/unix/sysv/linux/sparc/sparc64/sigreturn_stub.S
+@@ -23,7 +23,10 @@
+ 
+    [1] https://lkml.org/lkml/2016/5/27/465  */
+ 
+-ENTRY (__rt_sigreturn_stub)
++	nop
++	nop
++
++ENTRY_NOCFI (__rt_sigreturn_stub)
+ 	mov	__NR_rt_sigreturn, %g1
+ 	ta	0x6d
+-END (__rt_sigreturn_stub)
++END_NOCFI (__rt_sigreturn_stub)
+-- 
+2.33.0
+

x86_64-Optimize-ffsll-function-code-size.patch

@@ -0,0 +1,50 @@
+From 30e546d76e756fe4d2d20a8b2286de4fbf30ceb5 Mon Sep 17 00:00:00 2001
+From: Sunil K Pandey <skpgkp2@gmail.com>
+Date: Wed, 26 Jul 2023 08:34:05 -0700
+Subject: [PATCH 1/6] x86_64: Optimize ffsll function code size.
+
+Ffsll function randomly regress by ~20%, depending on how code gets
+aligned in memory.  Ffsll function code size is 17 bytes.  Since default
+function alignment is 16 bytes, it can load on 16, 32, 48 or 64 bytes
+aligned memory.  When ffsll function load at 16, 32 or 64 bytes aligned
+memory, entire code fits in single 64 bytes cache line.  When ffsll
+function load at 48 bytes aligned memory, it splits in two cache line,
+hence random regression.
+
+Ffsll function size reduction from 17 bytes to 12 bytes ensures that it
+will always fit in single 64 bytes cache line.
+
+This patch fixes ffsll function random performance regression.
+
+Reviewed-by: Carlos O'Donell <carlos@redhat.com>
+(cherry picked from commit 9d94997b5f9445afd4f2bccc5fa60ff7c4361ec1)
+---
+ sysdeps/x86_64/ffsll.c | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/sysdeps/x86_64/ffsll.c b/sysdeps/x86_64/ffsll.c
+index a1c13d4906..0c6680735c 100644
+--- a/sysdeps/x86_64/ffsll.c
++++ b/sysdeps/x86_64/ffsll.c
+@@ -26,13 +26,13 @@ int
+ ffsll (long long int x)
+ {
+   long long int cnt;
+-  long long int tmp;
+ 
+-  asm ("bsfq %2,%0\n"		/* Count low bits in X and store in %1.  */
+-       "cmoveq %1,%0\n"		/* If number was zero, use -1 as result.  */
+-       : "=&r" (cnt), "=r" (tmp) : "rm" (x), "1" (-1));
++  asm ("mov $-1,%k0\n"	/* Initialize cnt to -1.  */
++       "bsf %1,%0\n"	/* Count low bits in x and store in cnt.  */
++       "inc %k0\n"	/* Increment cnt by 1.  */
++       : "=&r" (cnt) : "r" (x));
+ 
+-  return cnt + 1;
++  return cnt;
+ }
+ 
+ #ifndef __ILP32__
+-- 
+2.33.0
+