New string function explicit_bzero (from OpenBSD).

explicit_bzero(s, n) is the same as memset(s, 0, n), except that the
compiler is not allowed to delete a call to explicit_bzero even if the
memory pointed to by 's' is dead after the call.  Right now, this effect
is achieved externally by having explicit_bzero be a function whose
semantics are unknown to the compiler, and internally, with a no-op
asm statement that clobbers memory.  This does mean that small
explicit_bzero operations cannot be expanded inline as small memset
operations can, but on the other hand, small memset operations do get
deleted by the compiler.  Hopefully full compiler support for
explicit_bzero will happen relatively soon.

There are two new tests: test-explicit_bzero.c verifies the
visible semantics in the same way as the existing test-bzero.c,
and tst-xbzero-opt.c verifies the not-being-optimized-out property.
The latter is conceptually based on a test written by Matthew Dempsky
for the OpenBSD regression suite.

The crypt() implementation has an immediate use for this new feature.
We avoid having to add a GLIBC_PRIVATE alias for explicit_bzero
by running all of libcrypt's calls through the fortified variant,
__explicit_bzero_chk, which is in the impl namespace anyway.  Currently
I'm not aware of anything in libc proper that needs this, but the
glue is all in place if it does become necessary.  The legacy DES
implementation wasn't bothering to clear its buffers, so I added that,
mostly for consistency's sake.

	* string/explicit_bzero.c: New routine.
	* string/test-explicit_bzero.c, string/tst-xbzero-opt.c: New tests.
	* string/Makefile (routines, strop-tests, tests): Add them.
	* string/test-memset.c: Add ifdeffage for testing explicit_bzero.
	* string/string.h [__USE_MISC]: Declare explicit_bzero.

	* debug/explicit_bzero_chk.c: New routine.
	* debug/Makefile (routines): Add it.
	* debug/tst-chk1.c: Test fortification of explicit_bzero.
	* string/bits/string3.h: Fortify explicit_bzero.

	* manual/string.texi: Document explicit_bzero.
	* NEWS: Mention addition of explicit_bzero.

	* crypt/crypt-entry.c (__crypt_r): Clear key-dependent intermediate
	data before returning, using explicit_bzero.
	* crypt/md5-crypt.c (__md5_crypt_r): Likewise.
	* crypt/sha256-crypt.c (__sha256_crypt_r): Likewise.
	* crypt/sha512-crypt.c (__sha512_crypt_r): Likewise.

	* include/string.h: Redirect internal uses of explicit_bzero
	to __explicit_bzero_chk[_internal].
	* string/Versions [GLIBC_2.25]: Add explicit_bzero.
	* debug/Versions [GLIBC_2.25]: Add __explicit_bzero_chk.
	* sysdeps/arm/nacl/libc.abilist
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist
	* sysdeps/unix/sysv/linux/alpha/libc.abilist
	* sysdeps/unix/sysv/linux/arm/libc.abilist
	* sysdeps/unix/sysv/linux/hppa/libc.abilist
	* sysdeps/unix/sysv/linux/i386/libc.abilist
	* sysdeps/unix/sysv/linux/ia64/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
	* sysdeps/unix/sysv/linux/nios2/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
	* sysdeps/unix/sysv/linux/sh/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist:
	Add entries for explicit_bzero and __explicit_bzero_chk.

29 files changed, 58 insertions, 0 deletions

diff --git a/sysdeps/arm/nacl/libc.abilist b/sysdeps/arm/nacl/libc.abilist
index 0a39f4d..abd70c8 100644
--- a/sysdeps/arm/nacl/libc.abilist
+++ b/sysdeps/arm/nacl/libc.abilist
@@ -1843,6 +1843,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 gnu_dev_major F
diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
index 8d3435f..58d768c 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
@@ -2090,6 +2090,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
index 2381616..906050d 100644
--- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
@@ -2001,6 +2001,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/arm/libc.abilist b/sysdeps/unix/sysv/linux/arm/libc.abilist
index e2dbf6f..66112dd 100644
--- a/sysdeps/unix/sysv/linux/arm/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arm/libc.abilist
@@ -91,6 +91,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist
index 231f039..3ddadd2 100644
--- a/sysdeps/unix/sysv/linux/hppa/libc.abilist
+++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist
@@ -1855,6 +1855,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist
index 5d01593..977ab90 100644
--- a/sysdeps/unix/sysv/linux/i386/libc.abilist
+++ b/sysdeps/unix/sysv/linux/i386/libc.abilist
@@ -2013,6 +2013,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist
index 00ef4d7..c7edb9a 100644
--- a/sysdeps/unix/sysv/linux/ia64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist
@@ -1877,6 +1877,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
index 7de0b0e..450be4e 100644
--- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
@@ -92,6 +92,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
index 93e1124..9e016bd 100644
--- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
@@ -1969,6 +1969,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/microblaze/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
index da70083..1a455be 100644
--- a/sysdeps/unix/sysv/linux/microblaze/libc.abilist
+++ b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
@@ -2090,6 +2090,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
index 570bbf6..8eb5e66 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
@@ -1944,6 +1944,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
index 5022e5a..416d9ac 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
@@ -1942,6 +1942,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
index ca9f919..f4949e5 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
@@ -1940,6 +1940,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
index 2a090db..c7375ae 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
@@ -1935,6 +1935,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist
index d10bb32..724a0e3 100644
--- a/sysdeps/unix/sysv/linux/nios2/libc.abilist
+++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist
@@ -2131,6 +2131,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
index a7e688b..2dc32b6 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
@@ -1973,6 +1973,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
index 8c32c33..5658109 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
@@ -1978,6 +1978,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
index 2a13e49..c761221 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
@@ -2178,6 +2178,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
index 4f29a6d..265c769 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
@@ -92,6 +92,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
index 1e9d4f4..ed1b6bf 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
@@ -1973,6 +1973,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
index 6b3d932..2e75d29 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
@@ -1874,6 +1874,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/sh/libc.abilist b/sysdeps/unix/sysv/linux/sh/libc.abilist
index 93b79d3..bd74c0c 100644
--- a/sysdeps/unix/sysv/linux/sh/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sh/libc.abilist
@@ -1859,6 +1859,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
index a29b0c1..5584838 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
@@ -1965,6 +1965,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
index 8ac06e9..efedbe2 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
@@ -1903,6 +1903,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
index 208e742..ffd988a 100644
--- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
@@ -2097,6 +2097,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
index 3d7836d..f0c13ce 100644
--- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
@@ -2097,6 +2097,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
index 208e742..ffd988a 100644
--- a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
+++ b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
@@ -2097,6 +2097,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
index 32cd1e0..f57004c 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
@@ -1854,6 +1854,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
index 4ff7acf..05629e1 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
@@ -2097,6 +2097,8 @@ GLIBC_2.23 fts64_set F
 GLIBC_2.24 GLIBC_2.24 A
 GLIBC_2.24 quick_exit F
 GLIBC_2.25 GLIBC_2.25 A
+GLIBC_2.25 __explicit_bzero_chk F
+GLIBC_2.25 explicit_bzero F
 GLIBC_2.25 getentropy F
 GLIBC_2.25 getrandom F
 GLIBC_2.25 strfromd F