[PATCH v3] String: Add support for __memcmpeq() ABI on all targets
Noah Goldstein
goldstein.w.n@gmail.com
Tue Sep 28 01:24:07 GMT 2021
No bug.
This commit adds support for __memcmpeq() as a new ABI for all
targets. In this commit __memcmpeq() is implemented only as an alias
to the corresponding targets memcmp() implementation. __memcmpeq() is
added as a new symbol starting with GLIBC_2.35 and defined in string.h
with comments explaining its behavior. Basic tests that it is callable
and works where added in string/tester.c
As discussed in the proposal "Add new ABI '__memcmpeq()' to libc"
__memcmpeq() is essentially a reserved namespace for bcmp(). The means
is shares the same specifications as memcmp() except the return value
for non-equal byte sequences is any non-zero value. This is less
strict than memcmp()'s return value specification and can be better
optimized when a boolean return is all that is needed.
__memcmpeq() is meant to only be called by compilers if they can prove
that the return value of a memcmp() call is only used for its boolean
value.
All tests in string/tester.c passed. As well build succeeds on
x86_64-linux-gnu target.
---
string/Versions | 3 +++
string/memcmp.c | 2 ++
string/string.h | 13 +++++++++++++
string/tester.c | 16 ++++++++++++++++
sysdeps/aarch64/memcmp.S | 2 ++
sysdeps/csky/abiv2/memcmp.S | 1 +
sysdeps/i386/i686/memcmp.S | 2 ++
sysdeps/i386/i686/multiarch/memcmp.c | 1 +
sysdeps/i386/memcmp.S | 2 ++
sysdeps/ia64/memcmp.S | 1 +
sysdeps/mach/hurd/i386/libc.abilist | 1 +
sysdeps/powerpc/powerpc32/405/memcmp.S | 1 +
sysdeps/powerpc/powerpc32/power4/memcmp.S | 1 +
sysdeps/powerpc/powerpc32/power7/memcmp.S | 1 +
sysdeps/powerpc/powerpc64/le/power10/memcmp.S | 1 +
sysdeps/powerpc/powerpc64/power4/memcmp.S | 1 +
sysdeps/powerpc/powerpc64/power7/memcmp.S | 1 +
sysdeps/powerpc/powerpc64/power8/memcmp.S | 1 +
sysdeps/s390/memcmp-z900.S | 1 +
sysdeps/s390/memcmp.c | 1 +
sysdeps/sparc/sparc64/memcmp.S | 2 ++
sysdeps/unix/sysv/linux/aarch64/libc.abilist | 1 +
sysdeps/unix/sysv/linux/alpha/libc.abilist | 1 +
sysdeps/unix/sysv/linux/arc/libc.abilist | 1 +
sysdeps/unix/sysv/linux/arm/be/libc.abilist | 1 +
sysdeps/unix/sysv/linux/arm/le/libc.abilist | 1 +
sysdeps/unix/sysv/linux/csky/libc.abilist | 1 +
sysdeps/unix/sysv/linux/hppa/libc.abilist | 1 +
sysdeps/unix/sysv/linux/i386/libc.abilist | 1 +
sysdeps/unix/sysv/linux/ia64/libc.abilist | 1 +
.../unix/sysv/linux/m68k/coldfire/libc.abilist | 1 +
sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist | 1 +
.../unix/sysv/linux/microblaze/be/libc.abilist | 1 +
.../unix/sysv/linux/microblaze/le/libc.abilist | 1 +
.../unix/sysv/linux/mips/mips32/fpu/libc.abilist | 1 +
.../sysv/linux/mips/mips32/nofpu/libc.abilist | 1 +
.../unix/sysv/linux/mips/mips64/n32/libc.abilist | 1 +
.../unix/sysv/linux/mips/mips64/n64/libc.abilist | 1 +
sysdeps/unix/sysv/linux/nios2/libc.abilist | 1 +
.../linux/powerpc/powerpc32/fpu/libc.abilist | 1 +
.../linux/powerpc/powerpc32/nofpu/libc.abilist | 1 +
.../sysv/linux/powerpc/powerpc64/be/libc.abilist | 1 +
.../sysv/linux/powerpc/powerpc64/le/libc.abilist | 1 +
sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist | 1 +
sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist | 1 +
.../unix/sysv/linux/s390/s390-32/libc.abilist | 1 +
.../unix/sysv/linux/s390/s390-64/libc.abilist | 1 +
sysdeps/unix/sysv/linux/sh/be/libc.abilist | 1 +
sysdeps/unix/sysv/linux/sh/le/libc.abilist | 1 +
.../unix/sysv/linux/sparc/sparc32/libc.abilist | 1 +
.../unix/sysv/linux/sparc/sparc64/libc.abilist | 1 +
sysdeps/unix/sysv/linux/x86_64/64/libc.abilist | 1 +
sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist | 1 +
sysdeps/x86_64/memcmp.S | 2 ++
sysdeps/x86_64/multiarch/memcmp.c | 2 ++
55 files changed, 91 insertions(+)
diff --git a/string/Versions b/string/Versions
index 298ecd401a..864c4cf7a4 100644
--- a/string/Versions
+++ b/string/Versions
@@ -89,4 +89,7 @@ libc {
sigdescr_np; sigabbrev_np;
strerrordesc_np; strerrorname_np;
}
+ GLIBC_2.35 {
+ __memcmpeq;
+ }
}
diff --git a/string/memcmp.c b/string/memcmp.c
index 9b46d7a905..550b7bb69b 100644
--- a/string/memcmp.c
+++ b/string/memcmp.c
@@ -358,4 +358,6 @@ libc_hidden_builtin_def(memcmp)
#ifdef weak_alias
# undef bcmp
weak_alias (memcmp, bcmp)
+#undef __memcmpeq
+weak_alias (memcmp, __memcmpeq)
#endif
diff --git a/string/string.h b/string/string.h
index 04e1b7067d..d965ca0eeb 100644
--- a/string/string.h
+++ b/string/string.h
@@ -64,6 +64,19 @@ extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
extern int memcmp (const void *__s1, const void *__s2, size_t __n)
__THROW __attribute_pure__ __nonnull ((1, 2));
+/* Compare N bytes of S1 and S2. Return zero if S1 and S2 are equals.
+ Return some non-zero value otherwise.
+
+ Essentially __memcmpeq has the exact same semantics as memcmp
+ except the return value is less constrained. memcmp is always a
+ correct implementation of __memcmpeq. As well !!memcmp, -memcmp,
+ or bcmp are correct implementations.
+
+ Used by compilers when memcmp return is only used for its bolean
+ value. */
+extern int __memcmpeq (const void *__s1, const void *__s2, size_t __n)
+ __THROW __attribute_pure__ __nonnull ((1, 2));
+
/* Search N bytes of S for C. */
#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
extern "C++"
diff --git a/string/tester.c b/string/tester.c
index 778160ae6e..7d8e1b7c1e 100644
--- a/string/tester.c
+++ b/string/tester.c
@@ -1449,6 +1449,19 @@ test_bcmp (void)
check(bcmp("abc", "def", 0) == 0, 8); /* Zero count. */
}
+static void
+test_memcmpeq (void)
+{
+ it = "__memcmpeq";
+ check(__memcmpeq("a", "a", 1) == 0, 1); /* Identity. */
+ check(__memcmpeq("abc", "abc", 3) == 0, 2); /* Multicharacter. */
+ check(__memcmpeq("abcd", "abce", 4) != 0, 3); /* Honestly unequal. */
+ check(__memcmpeq("abce", "abcd", 4) != 0, 4);
+ check(__memcmpeq("alph", "beta", 4) != 0, 5);
+ check(__memcmpeq("abce", "abcd", 3) == 0, 6); /* Count limited. */
+ check(__memcmpeq("abc", "def", 0) == 0, 8); /* Zero count. */
+}
+
static void
test_strerror (void)
{
@@ -1611,6 +1624,9 @@ main (void)
/* bcmp - somewhat like memcmp. */
test_bcmp ();
+ /* __memcmpeq - somewhat like memcmp. */
+ test_memcmpeq ();
+
/* strndup. */
test_strndup ();
diff --git a/sysdeps/aarch64/memcmp.S b/sysdeps/aarch64/memcmp.S
index c1937f6f5c..bc932eff2a 100644
--- a/sysdeps/aarch64/memcmp.S
+++ b/sysdeps/aarch64/memcmp.S
@@ -177,4 +177,6 @@ L(ret_0):
END (memcmp)
#undef bcmp
weak_alias (memcmp, bcmp)
+#undef __memcmpeq
+weak_alias (memcmp, __memcmpeq)
libc_hidden_builtin_def (memcmp)
diff --git a/sysdeps/csky/abiv2/memcmp.S b/sysdeps/csky/abiv2/memcmp.S
index 1560387618..d61fca0f29 100644
--- a/sysdeps/csky/abiv2/memcmp.S
+++ b/sysdeps/csky/abiv2/memcmp.S
@@ -138,5 +138,6 @@ ENTRY (memcmp)
br .L_s1_aligned
END (memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
libc_hidden_def (memcmp)
.weak memcmp
diff --git a/sysdeps/i386/i686/memcmp.S b/sysdeps/i386/i686/memcmp.S
index b26b124fad..0194f8deab 100644
--- a/sysdeps/i386/i686/memcmp.S
+++ b/sysdeps/i386/i686/memcmp.S
@@ -405,4 +405,6 @@ L(table_32bytes) :
#undef bcmp
weak_alias (memcmp, bcmp)
+#undef __memcmpeq
+weak_alias (memcmp, __memcmpeq)
libc_hidden_builtin_def (memcmp)
diff --git a/sysdeps/i386/i686/multiarch/memcmp.c b/sysdeps/i386/i686/multiarch/memcmp.c
index 6e058a8857..956fc8e601 100644
--- a/sysdeps/i386/i686/multiarch/memcmp.c
+++ b/sysdeps/i386/i686/multiarch/memcmp.c
@@ -29,4 +29,5 @@
libc_ifunc_redirected (__redirect_memcmp, memcmp, IFUNC_SELECTOR ());
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
#endif
diff --git a/sysdeps/i386/memcmp.S b/sysdeps/i386/memcmp.S
index 1f212b0f6d..18e225f963 100644
--- a/sysdeps/i386/memcmp.S
+++ b/sysdeps/i386/memcmp.S
@@ -70,4 +70,6 @@ END (memcmp)
#undef bcmp
weak_alias (memcmp, bcmp)
+#undef __memcmpeq
+weak_alias (memcmp, __memcmpeq)
libc_hidden_builtin_def (memcmp)
diff --git a/sysdeps/ia64/memcmp.S b/sysdeps/ia64/memcmp.S
index 97539c23fd..4488e0eba4 100644
--- a/sysdeps/ia64/memcmp.S
+++ b/sysdeps/ia64/memcmp.S
@@ -160,4 +160,5 @@ ENTRY(memcmp)
END(memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
libc_hidden_builtin_def (memcmp)
diff --git a/sysdeps/mach/hurd/i386/libc.abilist b/sysdeps/mach/hurd/i386/libc.abilist
index c5da10a0cd..e849d6fa35 100644
--- a/sysdeps/mach/hurd/i386/libc.abilist
+++ b/sysdeps/mach/hurd/i386/libc.abilist
@@ -2285,6 +2285,7 @@ GLIBC_2.34 res_send F
GLIBC_2.34 shm_open F
GLIBC_2.34 shm_unlink F
GLIBC_2.34 timespec_getres F
+GLIBC_2.35 __memcmpeq F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
diff --git a/sysdeps/powerpc/powerpc32/405/memcmp.S b/sysdeps/powerpc/powerpc32/405/memcmp.S
index 6a6a54d90f..e8b1b6c9bd 100644
--- a/sysdeps/powerpc/powerpc32/405/memcmp.S
+++ b/sysdeps/powerpc/powerpc32/405/memcmp.S
@@ -126,3 +126,4 @@ L(st2):
END (memcmp)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp,bcmp)
+weak_alias (memcmp, __memcmpeq)
diff --git a/sysdeps/powerpc/powerpc32/power4/memcmp.S b/sysdeps/powerpc/powerpc32/power4/memcmp.S
index 814d2f211d..e4dde875bb 100644
--- a/sysdeps/powerpc/powerpc32/power4/memcmp.S
+++ b/sysdeps/powerpc/powerpc32/power4/memcmp.S
@@ -1373,3 +1373,4 @@ END (memcmp)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
diff --git a/sysdeps/powerpc/powerpc32/power7/memcmp.S b/sysdeps/powerpc/powerpc32/power7/memcmp.S
index 8a19953e2d..e60a62fc86 100644
--- a/sysdeps/powerpc/powerpc32/power7/memcmp.S
+++ b/sysdeps/powerpc/powerpc32/power7/memcmp.S
@@ -1373,3 +1373,4 @@ END (memcmp)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
diff --git a/sysdeps/powerpc/powerpc64/le/power10/memcmp.S b/sysdeps/powerpc/powerpc64/le/power10/memcmp.S
index 52f244e7e7..c7fe8047ca 100644
--- a/sysdeps/powerpc/powerpc64/le/power10/memcmp.S
+++ b/sysdeps/powerpc/powerpc64/le/power10/memcmp.S
@@ -177,3 +177,4 @@ L(tail8):
END (MEMCMP)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
diff --git a/sysdeps/powerpc/powerpc64/power4/memcmp.S b/sysdeps/powerpc/powerpc64/power4/memcmp.S
index dc1be3a0d8..4ab4a90496 100644
--- a/sysdeps/powerpc/powerpc64/power4/memcmp.S
+++ b/sysdeps/powerpc/powerpc64/power4/memcmp.S
@@ -1374,3 +1374,4 @@ L(duzeroLength):
END (MEMCMP)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
diff --git a/sysdeps/powerpc/powerpc64/power7/memcmp.S b/sysdeps/powerpc/powerpc64/power7/memcmp.S
index bc034a55bc..b541978b5f 100644
--- a/sysdeps/powerpc/powerpc64/power7/memcmp.S
+++ b/sysdeps/powerpc/powerpc64/power7/memcmp.S
@@ -1059,3 +1059,4 @@ L(duzeroLength):
END (MEMCMP)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
diff --git a/sysdeps/powerpc/powerpc64/power8/memcmp.S b/sysdeps/powerpc/powerpc64/power8/memcmp.S
index b676b09a9b..d4f84a5b6f 100644
--- a/sysdeps/powerpc/powerpc64/power8/memcmp.S
+++ b/sysdeps/powerpc/powerpc64/power8/memcmp.S
@@ -1442,3 +1442,4 @@ L(duzeroLength):
END (MEMCMP)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
diff --git a/sysdeps/s390/memcmp-z900.S b/sysdeps/s390/memcmp-z900.S
index 995d52e47d..0942d32814 100644
--- a/sysdeps/s390/memcmp-z900.S
+++ b/sysdeps/s390/memcmp-z900.S
@@ -164,6 +164,7 @@ END(MEMCMP_Z196)
Otherwise see sysdeps/s390/memcmp.c. */
strong_alias (MEMCMP_DEFAULT, memcmp)
weak_alias (memcmp, bcmp)
+weak_alias (memcmp, __memcmpeq)
#endif
#if defined SHARED && IS_IN (libc)
diff --git a/sysdeps/s390/memcmp.c b/sysdeps/s390/memcmp.c
index 0b4e9da717..475fc45d3a 100644
--- a/sysdeps/s390/memcmp.c
+++ b/sysdeps/s390/memcmp.c
@@ -46,4 +46,5 @@ s390_libc_ifunc_expr (__redirect_memcmp, memcmp,
})
)
weak_alias (memcmp, bcmp);
+weak_alias (memcmp, __memcmpeq)
#endif
diff --git a/sysdeps/sparc/sparc64/memcmp.S b/sysdeps/sparc/sparc64/memcmp.S
index d8d9ff9b24..edcc19915a 100644
--- a/sysdeps/sparc/sparc64/memcmp.S
+++ b/sysdeps/sparc/sparc64/memcmp.S
@@ -137,4 +137,6 @@ END(memcmp)
#undef bcmp
weak_alias (memcmp, bcmp)
+#undef __memcmpeq
+weak_alias (memcmp, __memcmpeq)
libc_hidden_builtin_def (memcmp)
diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
index 21a2e50a88..f227ae6cee 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
@@ -2612,3 +2612,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
index a201fd69ba..eb86ac77a1 100644
--- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
@@ -3037,3 +3037,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/arc/libc.abilist b/sysdeps/unix/sysv/linux/arc/libc.abilist
index 2611436937..fd80704787 100644
--- a/sysdeps/unix/sysv/linux/arc/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arc/libc.abilist
@@ -2373,3 +2373,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/arm/be/libc.abilist b/sysdeps/unix/sysv/linux/arm/be/libc.abilist
index a426241965..accb893165 100644
--- a/sysdeps/unix/sysv/linux/arm/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arm/be/libc.abilist
@@ -2736,3 +2736,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/arm/le/libc.abilist b/sysdeps/unix/sysv/linux/arm/le/libc.abilist
index 02f80418cc..b699df0a10 100644
--- a/sysdeps/unix/sysv/linux/arm/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arm/le/libc.abilist
@@ -2733,3 +2733,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/csky/libc.abilist b/sysdeps/unix/sysv/linux/csky/libc.abilist
index b7676eb372..ba034b8541 100644
--- a/sysdeps/unix/sysv/linux/csky/libc.abilist
+++ b/sysdeps/unix/sysv/linux/csky/libc.abilist
@@ -2647,3 +2647,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist
index f6965c9d95..0fde110731 100644
--- a/sysdeps/unix/sysv/linux/hppa/libc.abilist
+++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist
@@ -2755,3 +2755,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist
index 2e7603d9ed..73507b3a1e 100644
--- a/sysdeps/unix/sysv/linux/i386/libc.abilist
+++ b/sysdeps/unix/sysv/linux/i386/libc.abilist
@@ -2939,3 +2939,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist
index dd3a56d3fe..003aa08281 100644
--- a/sysdeps/unix/sysv/linux/ia64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist
@@ -2706,3 +2706,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
index c1e0ea9c10..1d2546d8d9 100644
--- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
@@ -2715,3 +2715,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
index 93161048ca..e505a9fe15 100644
--- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
@@ -2882,3 +2882,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
index 0aaeec8a27..a223278a3d 100644
--- a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
@@ -2696,3 +2696,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
index bec5f456c9..780a4f5b0b 100644
--- a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
@@ -2693,3 +2693,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
index 97d2127f78..b7a832f430 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
@@ -2843,3 +2843,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
index acb0756c11..153a128ab4 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
@@ -2841,3 +2841,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
index ebc21dde1e..b33cae050f 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
@@ -2849,3 +2849,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
index c68f7e3c6c..7729535954 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
@@ -2753,3 +2753,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist
index e5b6834f14..8af5a3a90d 100644
--- a/sysdeps/unix/sysv/linux/nios2/libc.abilist
+++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist
@@ -2735,3 +2735,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
index 132707c8ad..9978c18019 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
@@ -3080,3 +3080,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
index 0af2be31a0..4b0945e30c 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
@@ -3125,3 +3125,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
index cf864632d0..eba9c641e9 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
@@ -2836,3 +2836,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
index d566d675d0..126541daf1 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
@@ -2808,3 +2808,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist
index c9a7eacb32..05df4d13d2 100644
--- a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist
@@ -2375,3 +2375,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
index 8299131cb2..8e349cbff8 100644
--- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
@@ -2575,3 +2575,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
index c3fe78f77f..29eeba351d 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
@@ -3092,3 +3092,4 @@ GLIBC_2.9 pututline F
GLIBC_2.9 pututxline F
GLIBC_2.9 updwtmp F
GLIBC_2.9 updwtmpx F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
index 83e542aa8c..ed24ea1e1a 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
@@ -2871,3 +2871,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/sh/be/libc.abilist b/sysdeps/unix/sysv/linux/sh/be/libc.abilist
index dc502f6833..fdaa24a946 100644
--- a/sysdeps/unix/sysv/linux/sh/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sh/be/libc.abilist
@@ -2762,3 +2762,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/sh/le/libc.abilist b/sysdeps/unix/sysv/linux/sh/le/libc.abilist
index cba1abb556..993590b09a 100644
--- a/sysdeps/unix/sysv/linux/sh/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sh/le/libc.abilist
@@ -2759,3 +2759,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
index d4a516fb47..bb54de8e30 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
@@ -3097,3 +3097,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
index 6268875ba3..b4cb71c497 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
@@ -2729,3 +2729,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
index 095e914b73..ee99d62fb5 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
@@ -2680,3 +2680,4 @@ GLIBC_2.9 ns_name_skip F
GLIBC_2.9 ns_name_uncompress F
GLIBC_2.9 ns_name_unpack F
GLIBC_2.9 pipe2 F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
index dd910f7fe9..94412dc134 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
@@ -2627,3 +2627,4 @@ GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F
GLIBC_2.34 tss_set F
+GLIBC_2.35 __memcmpeq F
diff --git a/sysdeps/x86_64/memcmp.S b/sysdeps/x86_64/memcmp.S
index 870e15c5a0..f41ae48006 100644
--- a/sysdeps/x86_64/memcmp.S
+++ b/sysdeps/x86_64/memcmp.S
@@ -358,4 +358,6 @@ END(memcmp)
#undef bcmp
weak_alias (memcmp, bcmp)
+#undef __memcmpeq
+weak_alias (memcmp, __memcmpeq)
libc_hidden_builtin_def (memcmp)
diff --git a/sysdeps/x86_64/multiarch/memcmp.c b/sysdeps/x86_64/multiarch/memcmp.c
index fe725f3563..9cc4750bbc 100644
--- a/sysdeps/x86_64/multiarch/memcmp.c
+++ b/sysdeps/x86_64/multiarch/memcmp.c
@@ -29,6 +29,8 @@
libc_ifunc_redirected (__redirect_memcmp, memcmp, IFUNC_SELECTOR ());
# undef bcmp
weak_alias (memcmp, bcmp)
+#undef __memcmpeq
+weak_alias (memcmp, __memcmpeq)
# ifdef SHARED
__hidden_ver1 (memcmp, __GI_memcmp, __redirect_memcmp)
--
2.25.1
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