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Re: [PATCH] libc.so: Replace nscd_hash.os with libc-nscd_hash.os [BZ #22459]
- From: Florian Weimer <fweimer at redhat dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>, GNU C Library <libc-alpha at sourceware dot org>
- Date: Mon, 20 Nov 2017 10:02:48 +0100
- Subject: Re: [PATCH] libc.so: Replace nscd_hash.os with libc-nscd_hash.os [BZ #22459]
- Authentication-results: sourceware.org; auth=none
- References: <20171119194403.GA4405@gmail.com>
On 11/19/2017 08:44 PM, H.J. Lu wrote:
nscd_hash.os is needed both libc.so as well as nscd. Since nscd_hash.os
is compiled as the part of nscd, when -fstack-protector-all is used,
nscd_hash.os calls __stack_chk_fail via PLT, which leads to
FAIL: elf/check-localplt
Extra PLT reference: libc.so: __stack_chk_fail
This patch replaces nscd_hash.os with libc-nscd_hash.os in libc_pic.a
to avoid calling __stack_chk_fail via PLT inside of libc.so.
Any comments?
Considering that nscd/nscd_hash.c is itself another #include wrapper, I
think it is time to clean this up.
The hash function algorithm is already part of the public ABI because
the nscd mappings require it, so we might as well export it, which is
implemented in the attached patch.
Thanks,
Florian
Subject: [PATCH] nss: Export nscd hash function as __nss_hash [BZ #22459]
To: libc-alpha@sourceware.org
The hash function is used to compute hashes for the keys in the nscd
mapping files, so the hash algorithm is already part of the de-facto
glibc API because alternative nscd implementations need to compute
hashes in exactly the same way.
2017-11-20 Florian Weimer <fweimer@redhat.com>
[BZ #22459]
Export nscd hash function as __nss_hash.
* include/nss.h (__nss_hash): Declare hidden alias.
* nis/nis_hash.c (__nis_hash): Call __nss_hash. Turn into compat
symbol.
* nscd/Makefile (aux, nscd-modules): Remove nscd_hash.
* nscd/cache.c (cache_search, cache_add): Call __nss_hash instead
of __nscd_hash.
* nscd/nscd_helper.c (__nscd_cache_search): Likewise.
* nscd/nscd_hash.h, nscd/nscd_hash.c: Remove files.
* nss/Makefiles (routines): Add nss_hash.
* nss/Versions (GLIBC_2.27): Export __nss_hash.
* nss/nss.h (__nss_hash): Declare.
* nss/nss_hash.c: Rename from nis/nis_hash.c.
(__nss_hash): Rename from __nis_hash. Define hidden alias.
* nis/rpcsvc/nislib.h (__nis_hash): Remove declaration.
* sysdeps/unix/sysv/linux/**/libc*.abilist: Update.
diff --git a/include/nss.h b/include/nss.h
index 5f29de7f84..351a44f204 100644
--- a/include/nss.h
+++ b/include/nss.h
@@ -11,5 +11,7 @@ _Bool __nss_valid_list_field (char **list) attribute_hidden;
const char *__nss_rewrite_field (const char *value, char **to_be_freed)
attribute_hidden;
+libc_hidden_proto (__nss_hash)
+
# endif /* !_ISOMAC */
#endif /* _NSS_H */
diff --git a/nis/nis_hash.c b/nis/nis_hash.c
index cc42ac8911..5dba1cba0f 100644
--- a/nis/nis_hash.c
+++ b/nis/nis_hash.c
@@ -1,6 +1,6 @@
-/* Copyright (c) 1997-2017 Free Software Foundation, Inc.
+/* Forward __nis_hash calls to __nss_hash, for ABI compatibility.
+ Copyright (c) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -16,61 +16,18 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <stdint.h>
-#include <rpcsvc/nis.h>
+#include <shlib-compat.h>
+
+#if SHLIB_COMPAT (libnsl, GLIBC_2_1, GLIBC_2_27)
+
+# include <nss.h>
-/* This is from libc/db/hash/hash_func.c, hash3 is static there */
-/*
- * This is INCREDIBLY ugly, but fast. We break the string up into 8 byte
- * units. On the first time through the loop we get the "leftover bytes"
- * (strlen % 8). On every other iteration, we perform 8 HASHC's so we handle
- * all 8 bytes. Essentially, this saves us 7 cmp & branch instructions. If
- * this routine is heavily used enough, it's worth the ugly coding.
- *
- * OZ's original sdbm hash
- */
uint32_t
__nis_hash (const void *keyarg, size_t len)
{
- const u_char *key;
- size_t loop;
- uint32_t h;
-
-#define HASHC h = *key++ + 65599 * h
-
- h = 0;
- key = keyarg;
- if (len > 0)
- {
- loop = (len + 8 - 1) >> 3;
- switch (len & (8 - 1))
- {
- case 0:
- do {
- HASHC;
- /* FALLTHROUGH */
- case 7:
- HASHC;
- /* FALLTHROUGH */
- case 6:
- HASHC;
- /* FALLTHROUGH */
- case 5:
- HASHC;
- /* FALLTHROUGH */
- case 4:
- HASHC;
- /* FALLTHROUGH */
- case 3:
- HASHC;
- /* FALLTHROUGH */
- case 2:
- HASHC;
- /* FALLTHROUGH */
- case 1:
- HASHC;
- } while (--loop);
- }
- }
- return h;
+ return __nss_hash (keyarg, len);
}
+
+compat_symbol (libnsl, __nis_hash, __nis_hash, GLIBC_2_1);
+
+#endif
diff --git a/nis/rpcsvc/nislib.h b/nis/rpcsvc/nislib.h
index 52fbba4b8f..ad22c9c767 100644
--- a/nis/rpcsvc/nislib.h
+++ b/nis/rpcsvc/nislib.h
@@ -244,7 +244,6 @@ extern uint32_t __nis_default_ttl (char *) __THROW;
extern unsigned int __nis_default_access (char *, unsigned int) __THROW;
extern fd_result *__nis_finddirectory (directory_obj *, const_nis_name) __THROW;
extern void __free_fdresult (fd_result *) __THROW;
-extern uint32_t __nis_hash (const void *__keyarg, size_t __len) __THROW;
/* NIS+ cache locking */
extern int __nis_lock_cache (void) __THROW;
diff --git a/nscd/Makefile b/nscd/Makefile
index 095f3e53d4..85e1c387d7 100644
--- a/nscd/Makefile
+++ b/nscd/Makefile
@@ -25,7 +25,7 @@ include ../Makeconfig
ifneq ($(use-nscd),no)
routines := nscd_getpw_r nscd_getgr_r nscd_gethst_r nscd_getai \
nscd_initgroups nscd_getserv_r nscd_netgroup
-aux := nscd_helper nscd_hash
+aux := nscd_helper
endif
# To find xmalloc.c
@@ -36,7 +36,7 @@ nscd-modules := nscd connections pwdcache getpwnam_r getpwuid_r grpcache \
getsrvbynm_r getsrvbypt_r servicescache \
dbg_log nscd_conf nscd_stat cache mem nscd_setup_thread \
xmalloc xstrdup aicache initgrcache gai res_hconf \
- netgroupcache nscd_hash
+ netgroupcache
ifeq ($(build-nscd)$(have-thread-library),yesyes)
diff --git a/nscd/cache.c b/nscd/cache.c
index 4a17c3371b..72c73d31d3 100644
--- a/nscd/cache.c
+++ b/nscd/cache.c
@@ -29,10 +29,10 @@
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/uio.h>
+#include <nss.h>
#include "nscd.h"
#include "dbg_log.h"
-#include "nscd_hash.h"
/* Wrapper functions with error checking for standard functions. */
@@ -74,7 +74,7 @@ struct datahead *
cache_search (request_type type, const void *key, size_t len,
struct database_dyn *table, uid_t owner)
{
- unsigned long int hash = __nscd_hash (key, len) % table->head->module;
+ unsigned long int hash = __nss_hash (key, len) % table->head->module;
unsigned long int nsearched = 0;
struct datahead *result = NULL;
@@ -153,7 +153,7 @@ cache_add (int type, const void *key, size_t len, struct datahead *packet,
first ? _(" (first)") : "");
}
- unsigned long int hash = __nscd_hash (key, len) % table->head->module;
+ unsigned long int hash = __nss_hash (key, len) % table->head->module;
struct hashentry *newp;
newp = mempool_alloc (table, sizeof (struct hashentry), 0);
diff --git a/nscd/nscd_hash.c b/nscd/nscd_hash.c
deleted file mode 100644
index 1572af616a..0000000000
--- a/nscd/nscd_hash.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/* 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/>. */
-
-#define __nis_hash __nscd_hash
-#include <nis/nis_hash.c>
diff --git a/nscd/nscd_hash.h b/nscd/nscd_hash.h
deleted file mode 100644
index e56d71015c..0000000000
--- a/nscd/nscd_hash.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/* 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 <stdint.h>
-
-extern uint32_t __nscd_hash (const void *__keyarg, size_t __len)
- attribute_hidden;
diff --git a/nscd/nscd_helper.c b/nscd/nscd_helper.c
index a42a4a7da5..ac04a2f572 100644
--- a/nscd/nscd_helper.c
+++ b/nscd/nscd_helper.c
@@ -36,10 +36,9 @@
#include <sys/un.h>
#include <not-cancel.h>
#include <kernel-features.h>
+#include <nss.h>
#include "nscd-client.h"
-#include "nscd_hash.h"
-
/* Extra time we wait if the socket is still receiving data. This
value is in milliseconds. Note that the other side is nscd on the
@@ -451,7 +450,7 @@ struct datahead *
__nscd_cache_search (request_type type, const char *key, size_t keylen,
const struct mapped_database *mapped, size_t datalen)
{
- unsigned long int hash = __nscd_hash (key, keylen) % mapped->head->module;
+ unsigned long int hash = __nss_hash (key, keylen) % mapped->head->module;
size_t datasize = mapped->datasize;
ref_t trail = mapped->head->array[hash];
diff --git a/nss/Makefile b/nss/Makefile
index 26952112c1..f9ecea56a0 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -28,7 +28,7 @@ headers := nss.h
routines = nsswitch getnssent getnssent_r digits_dots \
valid_field valid_list_field rewrite_field \
$(addsuffix -lookup,$(databases)) \
- compat-lookup
+ compat-lookup nss_hash
# These are the databases that go through nss dispatch.
# Caution: if you add a database here, you must add its real name
diff --git a/nss/Versions b/nss/Versions
index 7694998f1d..9429a1f6ac 100644
--- a/nss/Versions
+++ b/nss/Versions
@@ -8,6 +8,7 @@ libc {
__nss_hostname_digits_dots;
}
GLIBC_2.27 {
+ __nss_hash;
}
GLIBC_PRIVATE {
_nss_files_parse_grent; _nss_files_parse_pwent; _nss_files_parse_spent;
diff --git a/nss/nss.h b/nss/nss.h
index fefdc4e44b..cc4b9a0d49 100644
--- a/nss/nss.h
+++ b/nss/nss.h
@@ -22,9 +22,9 @@
#define _NSS_H 1
#include <features.h>
+#include <stddef.h>
#include <stdint.h>
-
__BEGIN_DECLS
/* Possible results of lookup using a nss_* function. */
@@ -58,6 +58,10 @@ struct gaih_addrtuple
extern int __nss_configure_lookup (const char *__dbname,
const char *__string) __THROW;
+/* Compute a hash value for LENGTH bytes starting at KEY. This is the
+ hash function used by the nscd for the cache mapping files. */
+uint32_t __nss_hash (const void *__key, size_t __length);
+
__END_DECLS
#endif /* nss.h */
diff --git a/nss/nss_hash.c b/nss/nss_hash.c
new file mode 100644
index 0000000000..aff11a9ef0
--- /dev/null
+++ b/nss/nss_hash.c
@@ -0,0 +1,77 @@
+/* Copyright (c) 1997-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
+
+ 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 <nss.h>
+
+/* This is from libc/db/hash/hash_func.c, hash3 is static there */
+/*
+ * This is INCREDIBLY ugly, but fast. We break the string up into 8 byte
+ * units. On the first time through the loop we get the "leftover bytes"
+ * (strlen % 8). On every other iteration, we perform 8 HASHC's so we handle
+ * all 8 bytes. Essentially, this saves us 7 cmp & branch instructions. If
+ * this routine is heavily used enough, it's worth the ugly coding.
+ *
+ * OZ's original sdbm hash
+ */
+uint32_t
+__nss_hash (const void *keyarg, size_t len)
+{
+ const unsigned char *key;
+ size_t loop;
+ uint32_t h;
+
+#define HASHC h = *key++ + 65599 * h
+
+ h = 0;
+ key = keyarg;
+ if (len > 0)
+ {
+ loop = (len + 8 - 1) >> 3;
+ switch (len & (8 - 1))
+ {
+ case 0:
+ do {
+ HASHC;
+ /* FALLTHROUGH */
+ case 7:
+ HASHC;
+ /* FALLTHROUGH */
+ case 6:
+ HASHC;
+ /* FALLTHROUGH */
+ case 5:
+ HASHC;
+ /* FALLTHROUGH */
+ case 4:
+ HASHC;
+ /* FALLTHROUGH */
+ case 3:
+ HASHC;
+ /* FALLTHROUGH */
+ case 2:
+ HASHC;
+ /* FALLTHROUGH */
+ case 1:
+ HASHC;
+ } while (--loop);
+ }
+ }
+ return h;
+}
+
+libc_hidden_def (__nss_hash)
diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
index ed598aedac..fb4d61c7f2 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
@@ -2104,6 +2104,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
index 4e57f36bcf..59b632a4e1 100644
--- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
@@ -2015,6 +2015,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/arm/libc.abilist b/sysdeps/unix/sysv/linux/arm/libc.abilist
index 5b70e1bfc9..5a939829bb 100644
--- a/sysdeps/unix/sysv/linux/arm/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arm/libc.abilist
@@ -105,6 +105,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.4 GLIBC_2.4 A
diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist
index 6a2500a8b3..82cb051c90 100644
--- a/sysdeps/unix/sysv/linux/hppa/libc.abilist
+++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist
@@ -1869,6 +1869,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist
index 9ab4e3642a..9213110105 100644
--- a/sysdeps/unix/sysv/linux/i386/libc.abilist
+++ b/sysdeps/unix/sysv/linux/i386/libc.abilist
@@ -2034,6 +2034,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist
index 81bb623fe8..a6b32abde6 100644
--- a/sysdeps/unix/sysv/linux/ia64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist
@@ -1898,6 +1898,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
index 5a33b57390..87c35059e0 100644
--- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
@@ -106,6 +106,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.4 GLIBC_2.4 A
diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
index 50a86e74fa..d9158772b6 100644
--- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
@@ -1983,6 +1983,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/microblaze/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
index 250ef305c3..72340b8adb 100644
--- a/sysdeps/unix/sysv/linux/microblaze/libc.abilist
+++ b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
@@ -2104,5 +2104,6 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
index 87a1dc4ad7..2669c21153 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
@@ -1958,6 +1958,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
index f2b35f250e..8c70a9383c 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
@@ -1956,6 +1956,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
index ade654dbea..d9fc012251 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
@@ -1954,6 +1954,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
index 56032c3f82..47ed025653 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
@@ -1949,6 +1949,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist
index c599dd9212..87271b0cb9 100644
--- a/sysdeps/unix/sysv/linux/nios2/libc.abilist
+++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist
@@ -2145,5 +2145,6 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
index 385409aa6e..734a419383 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
@@ -1987,6 +1987,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
index e99cb454b5..274ff08ac3 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
@@ -1992,6 +1992,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
index 173672ab5e..0e19a261eb 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
@@ -2199,5 +2199,6 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
index 8a654436ab..145519c667 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
@@ -106,6 +106,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
index dbd411ceb1..5b2cc5cb1a 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
@@ -1987,6 +1987,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
index 5617784ca0..957df85839 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
@@ -1888,6 +1888,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/sh/libc.abilist b/sysdeps/unix/sysv/linux/sh/libc.abilist
index 0f840e6e88..d93300b197 100644
--- a/sysdeps/unix/sysv/linux/sh/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sh/libc.abilist
@@ -1873,6 +1873,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
index bb7e1042c7..821397bb5c 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
@@ -1980,6 +1980,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
index 4053b0a51c..e228dd323b 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
@@ -1917,6 +1917,7 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 strfromf128 F
diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
index 38a96d3a02..0f49ab9b04 100644
--- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
@@ -2111,5 +2111,6 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
index 572b917d7d..67307e9e18 100644
--- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
@@ -2111,5 +2111,6 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
diff --git a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
index 38a96d3a02..0f49ab9b04 100644
--- a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
+++ b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
@@ -2111,5 +2111,6 @@ GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
index b83d25c2e3..0449682c65 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
@@ -1875,6 +1875,7 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.3 GLIBC_2.3 A
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
index cba1d59057..12e82c999c 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
@@ -2118,5 +2118,6 @@ GLIBC_2.26 strtof128_l F
GLIBC_2.26 wcstof128 F
GLIBC_2.26 wcstof128_l F
GLIBC_2.27 GLIBC_2.27 A
+GLIBC_2.27 __nss_hash F
GLIBC_2.27 glob F
GLIBC_2.27 glob64 F