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01/04: gnu: glibc: Update to 2.27.
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From: |
Marius Bakke |
|
Subject: |
01/04: gnu: glibc: Update to 2.27. |
|
Date: |
Thu, 22 Mar 2018 14:36:33 -0400 (EDT) |
mbakke pushed a commit to branch core-updates
in repository guix.
commit 5e8cb5e6980466f2571adb51f4dc5633cbd6b278
Author: Marius Bakke <address@hidden>
Date: Thu Mar 15 21:08:37 2018 +0100
gnu: glibc: Update to 2.27.
* gnu/packages/base.scm (glibc/linux): Update to 2.27.
[source](patches): Add 'glibc-hidden-visibility-ldconfig.patch' and
'glibc-2.27-git-fixes.patch'.
[native-inputs]: Add BISON.
[arguments]: Remove deprecated "--enable-add-ons" from #:configure-flags.
Also remove unneeded "libc_cv_ssp=no" and "libcv_ssp_strong=no".
(glibc-2.26): New public variable.
* gnu/packages/commencement.scm
(glibc-final-with-bootstrap-bash)[native-inputs]:
Add BISON-BOOT0.
* gnu/packages/patches/glibc-2.27-git-fixes.patch,
gnu/packages/patches/glibc-hidden-visibility-ldconfig.patch: New files.
* gnu/local.mk (dist_patch_DATA): Register them.
---
gnu/local.mk | 2 +
gnu/packages/base.scm | 49 +-
gnu/packages/commencement.scm | 3 +-
gnu/packages/patches/glibc-2.27-git-fixes.patch | 547 +++++++++++++++++++++
.../patches/glibc-hidden-visibility-ldconfig.patch | 16 +
5 files changed, 596 insertions(+), 21 deletions(-)
diff --git a/gnu/local.mk b/gnu/local.mk
index d444495..535039e 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -716,12 +716,14 @@ dist_patch_DATA =
\
%D%/packages/patches/glibc-CVE-2017-1000366-pt3.patch \
%D%/packages/patches/glibc-allow-kernel-2.6.32.patch \
%D%/packages/patches/glibc-bootstrap-system.patch \
+ %D%/packages/patches/glibc-hidden-visibility-ldconfig.patch \
%D%/packages/patches/glibc-ldd-x86_64.patch \
%D%/packages/patches/glibc-locales.patch \
%D%/packages/patches/glibc-memchr-overflow-i686.patch \
%D%/packages/patches/glibc-o-largefile.patch \
%D%/packages/patches/glibc-vectorized-strcspn-guards.patch \
%D%/packages/patches/glibc-versioned-locpath.patch \
+ %D%/packages/patches/glibc-2.27-git-fixes.patch \
%D%/packages/patches/glusterfs-use-PATH-instead-of-hardcodes.patch
\
%D%/packages/patches/glog-gcc-5-demangling.patch \
%D%/packages/patches/gmp-arm-asm-nothumb.patch \
diff --git a/gnu/packages/base.scm b/gnu/packages/base.scm
index 7265a46..06f4128 100644
--- a/gnu/packages/base.scm
+++ b/gnu/packages/base.scm
@@ -36,6 +36,7 @@
#:use-module (gnu packages)
#:use-module (gnu packages acl)
#:use-module (gnu packages bash)
+ #:use-module (gnu packages bison)
#:use-module (gnu packages ed)
#:use-module (gnu packages guile)
#:use-module (gnu packages multiprecision)
@@ -538,26 +539,15 @@ store.")
(define-public glibc/linux
(package
(name "glibc")
- ;; Glibc has stable branches that continuously pick fixes for each supported
- ;; release. Unfortunately they do not do point-releases, so we are stuck
- ;; with copying almost all patches, or use a snapshot of the release branch.
- ;;
- ;; This version number corresponds to the output of `git describe` and the
- ;; archive can be generated by checking out the commit ID and running:
- ;; git archive --prefix=$(git describe)/ HEAD | xz > $(git describe).tar.xz
- ;; See <https://bugs.gnu.org/29406> for details.
- ;;
;; Note: Always use a dot after the minor version since various places rely
;; on "version-major+minor" to determine where locales are found.
- (version "2.26.105-g0890d5379c")
+ (version "2.27")
(source (origin
(method url-fetch)
- (uri (string-append "https://alpha.gnu.org/gnu/guix/mirror/";
- "glibc-" (version-major+minor version) "-"
- (caddr (string-split version #\.)) ".tar.xz"))
+ (uri (string-append "mirror://gnu/glibc/glibc-" version ".tar.xz"))
(sha256
(base32
- "1jck0c1i248sn02rvsfjykk77qncma34bjq89dyy2irwm50d7s3g"))
+ "0wpwq7gsm7sd6ysidv0z575ckqdg13cr2njyfgrbgh4f65adwwji"))
(snippet
;; Disable 'ldconfig' and /etc/ld.so.cache. The latter is
;; required on LFS distros to avoid loading the distro's libc.so
@@ -569,6 +559,8 @@ store.")
#t))
(modules '((guix build utils)))
(patches (search-patches "glibc-ldd-x86_64.patch"
+ "glibc-2.27-git-fixes.patch"
+ "glibc-hidden-visibility-ldconfig.patch"
"glibc-versioned-locpath.patch"
"glibc-allow-kernel-2.6.32.patch"))))
(build-system gnu-build-system)
@@ -595,8 +587,7 @@ store.")
(guix build gnu-build-system))
#:configure-flags
- (list "--enable-add-ons"
- "--sysconfdir=/etc"
+ (list "--sysconfdir=/etc"
;; Installing a locale archive with all the locales is to
;; expensive (~100 MiB), so we rely on users to install the
@@ -631,10 +622,7 @@ store.")
;; Use our Bash instead of /bin/sh.
(string-append "BASH_SHELL="
(assoc-ref %build-inputs "bash")
- "/bin/bash")
-
- ;; XXX: Work around "undefined reference to `__stack_chk_guard'".
- "libc_cv_ssp=no" "libc_cv_ssp_strong=no")
+ "/bin/bash"))
#:tests? #f ; XXX
#:phases (modify-phases %standard-phases
@@ -745,6 +733,7 @@ store.")
;; install the message catalogs, with 'msgfmt'.
(native-inputs `(("texinfo" ,texinfo)
("perl" ,perl)
+ ("bison" ,bison)
("gettext" ,gettext-minimal)))
(native-search-paths
@@ -853,6 +842,26 @@ GLIBC/HURD for a Hurd host"
;; Below are old libc versions, which we use mostly to build locale data in
;; the old format (which the new libc cannot cope with.)
+(define-public glibc-2.26
+ (package
+ (inherit glibc)
+ ;; This version number corresponds to the output of `git describe` and the
+ ;; archive can be generated by checking out the commit ID and running:
+ ;; git archive --prefix=$(git describe)/ HEAD | xz > $(git
describe).tar.xz
+ ;; See <https://bugs.gnu.org/29406> for why this was necessary.
+ (version "2.26.105-g0890d5379c")
+ (source (origin
+ (inherit (package-source glibc))
+ (uri (string-append "https://alpha.gnu.org/gnu/guix/mirror/";
+ "glibc-" (version-major+minor version) "-"
+ (caddr (string-split version #\.))
".tar.xz"))
+ (sha256
+ (base32
+ "1jck0c1i248sn02rvsfjykk77qncma34bjq89dyy2irwm50d7s3g"))
+ (patches (search-patches "glibc-ldd-x86_64.patch"
+ "glibc-versioned-locpath.patch"
+ "glibc-allow-kernel-2.6.32.patch"))))))
+
(define-public glibc-2.25
(package
(inherit glibc)
diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index 92766de..3a7555b 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -522,7 +522,8 @@ the bootstrap environment."
#t)))))))
(propagated-inputs `(("kernel-headers" ,(kernel-headers-boot0))))
(native-inputs
- `(("texinfo" ,texinfo-boot0)
+ `(("bison" ,bison-boot0)
+ ("texinfo" ,texinfo-boot0)
("perl" ,perl-boot0)))
(inputs
`(;; The boot inputs. That includes the bootstrap libc. We don't want
diff --git a/gnu/packages/patches/glibc-2.27-git-fixes.patch
b/gnu/packages/patches/glibc-2.27-git-fixes.patch
new file mode 100644
index 0000000..c28bac2
--- /dev/null
+++ b/gnu/packages/patches/glibc-2.27-git-fixes.patch
@@ -0,0 +1,547 @@
+These commits are cherry-picked from the "release/2.27/master" branch.
+
+https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/release/2.27/master
+
+Currently, we have the following (with NEWS and ChangeLog entries omitted).
+
+56170e064e2b21ce204f0817733e92f1730541ea
+516fa6080481a1433c173320b1c1432868e1e38a
+f36553bf6a4f69070f99badbdab5802b43e6e211
+7c6304182b9f422b782ace1cdd3efbde056aec36
+78a90c2f74a2012dd3eff302189e47ff6779a757
+1e52d8e65a58c49a48549053a1b89c06240e0c6c
+
+From 56170e064e2b21ce204f0817733e92f1730541ea Mon Sep 17 00:00:00 2001
+From: Igor Gnatenko <address@hidden>
+Date: Wed, 7 Feb 2018 13:53:10 +0100
+Subject: [PATCH] Linux: use reserved name __key in pkey_get [BZ #22797]
+
+_key is not reserved name and we should avoid using that. It seems that
+it was simple typo when pkey_* was implemented.
+
+(cherry picked from commit 388ff7bd0d57d7061fdd39a2f26f65687e8058da)
+
+diff --git a/sysdeps/unix/sysv/linux/bits/mman-shared.h
b/sysdeps/unix/sysv/linux/bits/mman-shared.h
+index 7715e680ca..d15ba95c9d 100644
+--- a/sysdeps/unix/sysv/linux/bits/mman-shared.h
++++ b/sysdeps/unix/sysv/linux/bits/mman-shared.h
+@@ -61,7 +61,7 @@ int pkey_set (int __key, unsigned int __access_rights)
__THROW;
+
+ /* Return the access rights for the current thread for KEY, which must
+ have been allocated using pkey_alloc. */
+-int pkey_get (int _key) __THROW;
++int pkey_get (int __key) __THROW;
+
+ /* Free an allocated protection key, which must have been allocated
+ using pkey_alloc. */
+
+From 516fa6080481a1433c173320b1c1432868e1e38a Mon Sep 17 00:00:00 2001
+From: "Dmitry V. Levin" <address@hidden>
+Date: Fri, 29 Dec 2017 23:19:32 +0000
+Subject: [PATCH] linux/aarch64: sync sys/ptrace.h with Linux 4.15 [BZ #22433]
+
+Remove compat-specific constants that were never exported by kernel
+headers under these names. Before linux commit v3.7-rc1~16^2~1 they
+were exported with COMPAT_ prefix, and since that commit they are not
+exported at all.
+
+* sysdeps/unix/sysv/linux/aarch64/sys/ptrace.h (__ptrace_request):
+Remove arm-specific PTRACE_GET_THREAD_AREA, PTRACE_GETHBPREGS,
+and PTRACE_SETHBPREGS.
+
+(cherry picked from commit 2fd4bbaa1446f1be700e10c526cf585a796c4991)
+
+diff --git a/sysdeps/unix/sysv/linux/aarch64/sys/ptrace.h
b/sysdeps/unix/sysv/linux/aarch64/sys/ptrace.h
+index 4be45b95ff..444edbb702 100644
+--- a/sysdeps/unix/sysv/linux/aarch64/sys/ptrace.h
++++ b/sysdeps/unix/sysv/linux/aarch64/sys/ptrace.h
+@@ -78,18 +78,10 @@ enum __ptrace_request
+ PTRACE_DETACH = 17,
+ #define PT_DETACH PTRACE_DETACH
+
+- PTRACE_GET_THREAD_AREA = 22,
+-
+ /* Continue and stop at the next entry to or return from syscall. */
+ PTRACE_SYSCALL = 24,
+ #define PT_SYSCALL PTRACE_SYSCALL
+
+- /* Get all hardware breakpoint registers. */
+- PTRACE_GETHBPREGS = 29,
+-
+- /* Set all hardware breakpoint registers. */
+- PTRACE_SETHBPREGS = 30,
+-
+ /* Set ptrace filter options. */
+ PTRACE_SETOPTIONS = 0x4200,
+ #define PT_SETOPTIONS PTRACE_SETOPTIONS
+
+From f36553bf6a4f69070f99badbdab5802b43e6e211 Mon Sep 17 00:00:00 2001
+From: Mike FABIAN <address@hidden>
+Date: Mon, 19 Feb 2018 21:59:30 +0100
+Subject: [PATCH] =?UTF-8?q?Add=20missing=20=E2=80=9Creorder-end=E2=80=9D?=
+ =?UTF-8?q?=20in=20LC=5FCOLLATE=20of=20et=5FEE=20[BZ=20#22517]?=
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+ [BZ #22517]
+ * localedata/locales/et_EE (LC_COLLATE): add missing “reorder-end”
+
+(cherry picked from commit 7ec5f9465e732e668d0dc94ac078ba68056d6d0a)
+
+diff --git a/localedata/locales/et_EE b/localedata/locales/et_EE
+index 9cb55b568f..bab7493c98 100644
+--- a/localedata/locales/et_EE
++++ b/localedata/locales/et_EE
+@@ -103,6 +103,8 @@ reorder-after <w>
+ <U00FC> <u-diaresis>;<BAS>;<MIN>;IGNORE % ü
+ <U00DC> <u-diaresis>;<BAS>;<CAP>;IGNORE % Ü
+
++reorder-end
++
+ END LC_COLLATE
+
+ LC_CTYPE
+
+From 7c6304182b9f422b782ace1cdd3efbde056aec36 Mon Sep 17 00:00:00 2001
+From: DJ Delorie <address@hidden>
+Date: Thu, 1 Mar 2018 23:20:45 -0500
+Subject: [PATCH] [BZ #22342] Fix netgroup cache keys.
+
+Unlike other nscd caches, the netgroup cache contains two types of
+records - those for "iterate through a netgroup" (i.e. setnetgrent())
+and those for "is this user in this netgroup" (i.e. innetgr()),
+i.e. full and partial records. The timeout code assumes these records
+have the same key for the group name, so that the collection of records
+that is "this netgroup" can be expired as a unit.
+
+However, the keys are not the same, as the in-netgroup key is generated
+by nscd rather than being passed to it from elsewhere, and is generated
+without the trailing NUL. All other keys have the trailing NUL, and as
+noted in the linked BZ, debug statements confirm that two keys for the
+same netgroup are added to the cache with two different lengths.
+
+The result of this is that as records in the cache expire, the purge
+code only cleans out one of the two types of entries, resulting in
+stale, possibly incorrect, and possibly inconsistent cache data.
+
+The patch simply includes the existing NUL in the computation for the
+key length ('key' points to the char after the NUL, and 'group' to the
+first char of the group, so 'key-group' includes the first char to the
+NUL, inclusive).
+
+ [BZ #22342]
+ * nscd/netgroupcache.c (addinnetgrX): Include trailing NUL in
+ key value.
+
+Reviewed-by: Carlos O'Donell <address@hidden>
+(cherry picked from commit 1c81d55fc4b07b51adf68558ba74ce975153e580)
+
+diff --git a/nscd/netgroupcache.c b/nscd/netgroupcache.c
+index b832c9315f..2f187b208c 100644
+--- a/nscd/netgroupcache.c
++++ b/nscd/netgroupcache.c
+@@ -480,7 +480,7 @@ addinnetgrX (struct database_dyn *db, int fd,
request_header *req,
+ {
+ const char *group = key;
+ key = (char *) rawmemchr (key, '\0') + 1;
+- size_t group_len = key - group - 1;
++ size_t group_len = key - group;
+ const char *host = *key++ ? key : NULL;
+ if (host != NULL)
+ key = (char *) rawmemchr (key, '\0') + 1;
+
+From 78a90c2f74a2012dd3eff302189e47ff6779a757 Mon Sep 17 00:00:00 2001
+From: Andreas Schwab <address@hidden>
+Date: Fri, 2 Mar 2018 23:07:14 +0100
+Subject: [PATCH] Fix multiple definitions of __nss_*_database (bug 22918)
+
+(cherry picked from commit eaf6753f8aac33a36deb98c1031d1bad7b593d2d)
+
+diff --git a/nscd/gai.c b/nscd/gai.c
+index d081747797..576fd0045b 100644
+--- a/nscd/gai.c
++++ b/nscd/gai.c
+@@ -45,3 +45,6 @@
+ #ifdef HAVE_LIBIDN
+ # include <libidn/idn-stub.c>
+ #endif
++
++/* Some variables normally defined in libc. */
++service_user *__nss_hosts_database attribute_hidden;
+diff --git a/nss/nsswitch.c b/nss/nsswitch.c
+index d5e655974f..b0f0c11a3e 100644
+--- a/nss/nsswitch.c
++++ b/nss/nsswitch.c
+@@ -62,7 +62,7 @@ static service_library *nss_new_service (name_database
*database,
+
+ /* Declare external database variables. */
+ #define DEFINE_DATABASE(name) \
+- extern service_user *__nss_##name##_database attribute_hidden; \
++ service_user *__nss_##name##_database attribute_hidden; \
+ weak_extern (__nss_##name##_database)
+ #include "databases.def"
+ #undef DEFINE_DATABASE
+diff --git a/nss/nsswitch.h b/nss/nsswitch.h
+index eccb535ef5..63573b9ebc 100644
+--- a/nss/nsswitch.h
++++ b/nss/nsswitch.h
+@@ -226,10 +226,10 @@ libc_hidden_proto (__nss_hostname_digits_dots)
+ #define MAX_NR_ADDRS 48
+
+ /* Prototypes for __nss_*_lookup2 functions. */
+-#define DEFINE_DATABASE(arg) \
+- service_user *__nss_##arg##_database attribute_hidden; \
+- int __nss_##arg##_lookup2 (service_user **, const char *, \
+- const char *, void **); \
++#define DEFINE_DATABASE(arg) \
++ extern service_user *__nss_##arg##_database attribute_hidden;
\
++ int __nss_##arg##_lookup2 (service_user **, const char *, \
++ const char *, void **); \
+ libc_hidden_proto (__nss_##arg##_lookup2)
+ #include "databases.def"
+ #undef DEFINE_DATABASE
+diff --git a/posix/tst-rfc3484-2.c b/posix/tst-rfc3484-2.c
+index f509534ca9..8c64ac59ff 100644
+--- a/posix/tst-rfc3484-2.c
++++ b/posix/tst-rfc3484-2.c
+@@ -58,6 +58,7 @@ _res_hconf_init (void)
+ #undef USE_NSCD
+ #include "../sysdeps/posix/getaddrinfo.c"
+
++service_user *__nss_hosts_database attribute_hidden;
+
+ /* This is the beginning of the real test code. The above defines
+ (among other things) the function rfc3484_sort. */
+diff --git a/posix/tst-rfc3484-3.c b/posix/tst-rfc3484-3.c
+index ae44087a10..1c61aaf844 100644
+--- a/posix/tst-rfc3484-3.c
++++ b/posix/tst-rfc3484-3.c
+@@ -58,6 +58,7 @@ _res_hconf_init (void)
+ #undef USE_NSCD
+ #include "../sysdeps/posix/getaddrinfo.c"
+
++service_user *__nss_hosts_database attribute_hidden;
+
+ /* This is the beginning of the real test code. The above defines
+ (among other things) the function rfc3484_sort. */
+diff --git a/posix/tst-rfc3484.c b/posix/tst-rfc3484.c
+index 7f191abbbc..8f45848e44 100644
+--- a/posix/tst-rfc3484.c
++++ b/posix/tst-rfc3484.c
+@@ -58,6 +58,7 @@ _res_hconf_init (void)
+ #undef USE_NSCD
+ #include "../sysdeps/posix/getaddrinfo.c"
+
++service_user *__nss_hosts_database attribute_hidden;
+
+ /* This is the beginning of the real test code. The above defines
+ (among other things) the function rfc3484_sort. */
+
+From 1e52d8e65a58c49a48549053a1b89c06240e0c6c Mon Sep 17 00:00:00 2001
+From: Adhemerval Zanella <address@hidden>
+Date: Fri, 17 Nov 2017 16:04:29 -0200
+Subject: [PATCH] i386: Fix i386 sigaction sa_restorer initialization
+ (BZ#21269)
+
+This patch fixes the i386 sa_restorer field initialization for sigaction
+syscall for kernel with vDSO. As described in bug report, i386 Linux
+(and compat on x86_64) interprets SA_RESTORER clear with nonzero
+sa_restorer as a request for stack switching if the SS segment is 'funny'.
+This means that anything that tries to mix glibc's signal handling with
+segmentation (for instance through modify_ldt syscall) is randomly broken
+depending on what values lands in sa_restorer.
+
+The testcase added is based on Linux test
tools/testing/selftests/x86/ldt_gdt.c,
+more specifically in do_multicpu_tests function. The main changes are:
+
+ - C11 atomics instead of plain access.
+
+ - Remove x86_64 support which simplifies the syscall handling and fallbacks.
+
+ - Replicate only the test required to trigger the issue.
+
+Checked on i686-linux-gnu.
+
+ [BZ #21269]
+ * sysdeps/unix/sysv/linux/i386/Makefile (tests): Add tst-bz21269.
+ * sysdeps/unix/sysv/linux/i386/sigaction.c (SET_SA_RESTORER): Clear
+ sa_restorer for vDSO case.
+ * sysdeps/unix/sysv/linux/i386/tst-bz21269.c: New file.
+
+(cherry picked from commit 68448be208ee06e76665918b37b0a57e3e00c8b4)
+
+diff --git a/sysdeps/unix/sysv/linux/i386/Makefile
b/sysdeps/unix/sysv/linux/i386/Makefile
+index 4080b8c966..da716e2c1b 100644
+--- a/sysdeps/unix/sysv/linux/i386/Makefile
++++ b/sysdeps/unix/sysv/linux/i386/Makefile
+@@ -3,6 +3,9 @@ default-abi := 32
+
+ ifeq ($(subdir),misc)
+ sysdep_routines += ioperm iopl vm86
++
++tests += tst-bz21269
++$(objpfx)tst-bz21269: $(shared-thread-library)
+ endif
+
+ ifeq ($(subdir),elf)
+diff --git a/sysdeps/unix/sysv/linux/i386/sigaction.c
b/sysdeps/unix/sysv/linux/i386/sigaction.c
+index a5eb9e0d3e..177ff60ee6 100644
+--- a/sysdeps/unix/sysv/linux/i386/sigaction.c
++++ b/sysdeps/unix/sysv/linux/i386/sigaction.c
+@@ -42,7 +42,6 @@ extern void restore_rt (void) asm ("__restore_rt")
attribute_hidden;
+ #endif
+ extern void restore (void) asm ("__restore") attribute_hidden;
+
+-
+ /* If ACT is not NULL, change the action for SIG to *ACT.
+ If OACT is not NULL, put the old action for SIG in *OACT. */
+ int
+@@ -65,6 +64,8 @@ __libc_sigaction (int sig, const struct sigaction *act,
struct sigaction *oact)
+ kact.sa_restorer = ((act->sa_flags & SA_SIGINFO)
+ ? &restore_rt : &restore);
+ }
++ else
++ kact.sa_restorer = NULL;
+ }
+
+ /* XXX The size argument hopefully will have to be changed to the
+diff --git a/sysdeps/unix/sysv/linux/i386/tst-bz21269.c
b/sysdeps/unix/sysv/linux/i386/tst-bz21269.c
+new file mode 100644
+index 0000000000..353e36507d
+--- /dev/null
++++ b/sysdeps/unix/sysv/linux/i386/tst-bz21269.c
+@@ -0,0 +1,233 @@
++/* Test for i386 sigaction sa_restorer handling (BZ#21269)
++ 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/>. */
++
++/* This is based on Linux test tools/testing/selftests/x86/ldt_gdt.c,
++ more specifically in do_multicpu_tests function. The main changes
++ are:
++
++ - C11 atomics instead of plain access.
++ - Remove x86_64 support which simplifies the syscall handling
++ and fallbacks.
++ - Replicate only the test required to trigger the issue for the
++ BZ#21269. */
++
++#include <stdatomic.h>
++
++#include <asm/ldt.h>
++#include <linux/futex.h>
++
++#include <setjmp.h>
++#include <signal.h>
++#include <errno.h>
++#include <sys/syscall.h>
++#include <sys/mman.h>
++
++#include <support/xunistd.h>
++#include <support/check.h>
++#include <support/xthread.h>
++
++static int
++xset_thread_area (struct user_desc *u_info)
++{
++ long ret = syscall (SYS_set_thread_area, u_info);
++ TEST_VERIFY_EXIT (ret == 0);
++ return ret;
++}
++
++static void
++xmodify_ldt (int func, const void *ptr, unsigned long bytecount)
++{
++ TEST_VERIFY_EXIT (syscall (SYS_modify_ldt, 1, ptr, bytecount) == 0);
++}
++
++static int
++futex (int *uaddr, int futex_op, int val, void *timeout, int *uaddr2,
++ int val3)
++{
++ return syscall (SYS_futex, uaddr, futex_op, val, timeout, uaddr2, val3);
++}
++
++static void
++xsethandler (int sig, void (*handler)(int, siginfo_t *, void *), int flags)
++{
++ struct sigaction sa = { 0 };
++ sa.sa_sigaction = handler;
++ sa.sa_flags = SA_SIGINFO | flags;
++ TEST_VERIFY_EXIT (sigemptyset (&sa.sa_mask) == 0);
++ TEST_VERIFY_EXIT (sigaction (sig, &sa, 0) == 0);
++}
++
++static jmp_buf jmpbuf;
++
++static void
++sigsegv_handler (int sig, siginfo_t *info, void *ctx_void)
++{
++ siglongjmp (jmpbuf, 1);
++}
++
++/* Points to an array of 1024 ints, each holding its own index. */
++static const unsigned int *counter_page;
++static struct user_desc *low_user_desc;
++static struct user_desc *low_user_desc_clear; /* Used to delete GDT entry. */
++static int gdt_entry_num;
++
++static void
++setup_counter_page (void)
++{
++ long page_size = sysconf (_SC_PAGE_SIZE);
++ TEST_VERIFY_EXIT (page_size > 0);
++ unsigned int *page = xmmap (NULL, page_size, PROT_READ | PROT_WRITE,
++ MAP_ANONYMOUS | MAP_PRIVATE | MAP_32BIT, -1);
++ for (int i = 0; i < (page_size / sizeof (unsigned int)); i++)
++ page[i] = i;
++ counter_page = page;
++}
++
++static void
++setup_low_user_desc (void)
++{
++ low_user_desc = xmmap (NULL, 2 * sizeof (struct user_desc),
++ PROT_READ | PROT_WRITE,
++ MAP_ANONYMOUS | MAP_PRIVATE | MAP_32BIT, -1);
++
++ low_user_desc->entry_number = -1;
++ low_user_desc->base_addr = (unsigned long) &counter_page[1];
++ low_user_desc->limit = 0xffff;
++ low_user_desc->seg_32bit = 1;
++ low_user_desc->contents = 0;
++ low_user_desc->read_exec_only = 0;
++ low_user_desc->limit_in_pages = 1;
++ low_user_desc->seg_not_present = 0;
++ low_user_desc->useable = 0;
++
++ xset_thread_area (low_user_desc);
++
++ low_user_desc_clear = low_user_desc + 1;
++ low_user_desc_clear->entry_number = gdt_entry_num;
++ low_user_desc_clear->read_exec_only = 1;
++ low_user_desc_clear->seg_not_present = 1;
++}
++
++/* Possible values of futex:
++ 0: thread is idle.
++ 1: thread armed.
++ 2: thread should clear LDT entry 0.
++ 3: thread should exit. */
++static atomic_uint ftx;
++
++static void *
++threadproc (void *ctx)
++{
++ while (1)
++ {
++ futex ((int *) &ftx, FUTEX_WAIT, 1, NULL, NULL, 0);
++ while (atomic_load (&ftx) != 2)
++ {
++ if (atomic_load (&ftx) >= 3)
++ return NULL;
++ }
++
++ /* clear LDT entry 0. */
++ const struct user_desc desc = { 0 };
++ xmodify_ldt (1, &desc, sizeof (desc));
++
++ /* If ftx == 2, set it to zero, If ftx == 100, quit. */
++ if (atomic_fetch_add (&ftx, -2) != 2)
++ return NULL;
++ }
++}
++
++
++/* As described in testcase, for historical reasons x86_32 Linux (and compat
++ on x86_64) interprets SA_RESTORER clear with nonzero sa_restorer as a
++ request for stack switching if the SS segment is 'funny' (this is default
++ scenario for vDSO system). This means that anything that tries to mix
++ signal handling with segmentation should explicit clear the sa_restorer.
++
++ This testcase check if sigaction in fact does it by changing the local
++ descriptor table (LDT) through the modify_ldt syscall and triggering
++ a synchronous segfault on iret fault by trying to install an invalid
++ segment. With a correct zeroed sa_restorer it should not trigger an
++ 'real' SEGSEGV and allows the siglongjmp in signal handler. */
++
++static int
++do_test (void)
++{
++ setup_counter_page ();
++ setup_low_user_desc ();
++
++ pthread_t thread;
++ unsigned short orig_ss;
++
++ xsethandler (SIGSEGV, sigsegv_handler, 0);
++ /* 32-bit kernels send SIGILL instead of SIGSEGV on IRET faults. */
++ xsethandler (SIGILL, sigsegv_handler, 0);
++
++ thread = xpthread_create (0, threadproc, 0);
++
++ asm volatile ("mov %%ss, %0" : "=rm" (orig_ss));
++
++ for (int i = 0; i < 5; i++)
++ {
++ if (sigsetjmp (jmpbuf, 1) != 0)
++ continue;
++
++ /* Make sure the thread is ready after the last test. */
++ while (atomic_load (&ftx) != 0)
++ ;
++
++ struct user_desc desc = {
++ .entry_number = 0,
++ .base_addr = 0,
++ .limit = 0xffff,
++ .seg_32bit = 1,
++ .contents = 0,
++ .read_exec_only = 0,
++ .limit_in_pages = 1,
++ .seg_not_present = 0,
++ .useable = 0
++ };
++
++ xmodify_ldt (0x11, &desc, sizeof (desc));
++
++ /* Arm the thread. */
++ ftx = 1;
++ futex ((int*) &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);
++
++ asm volatile ("mov %0, %%ss" : : "r" (0x7));
++
++ /* Fire up thread modify_ldt call. */
++ atomic_store (&ftx, 2);
++
++ while (atomic_load (&ftx) != 0)
++ ;
++
++ /* On success, modify_ldt will segfault us synchronously and we will
++ escape via siglongjmp. */
++ support_record_failure ();
++ }
++
++ atomic_store (&ftx, 100);
++ futex ((int*) &ftx, FUTEX_WAKE, 0, NULL, NULL, 0);
++
++ xpthread_join (thread);
++
++ return 0;
++}
++
++#include <support/test-driver.c>
diff --git a/gnu/packages/patches/glibc-hidden-visibility-ldconfig.patch
b/gnu/packages/patches/glibc-hidden-visibility-ldconfig.patch
new file mode 100644
index 0000000..c796946
--- /dev/null
+++ b/gnu/packages/patches/glibc-hidden-visibility-ldconfig.patch
@@ -0,0 +1,16 @@
+Fix a regression in glibc 2.27 when built without ldconfig. See
+<https://sourceware.org/bugzilla/show_bug.cgi?id=22977> for details.
+
+diff --git a/include/libc-symbols.h b/include/libc-symbols.h
+index 6137304b0b..7d630f36d8 100644
+--- a/include/libc-symbols.h
++++ b/include/libc-symbols.h
+@@ -508,7 +508,7 @@ for linking")
+ # ifndef __ASSEMBLER__
+ # if !defined SHARED && IS_IN (libc) && !defined LIBC_NONSHARED \
+ && (!defined PIC || !defined NO_HIDDEN_EXTERN_FUNC_IN_PIE) \
+- && !defined NO_HIDDEN
++ && !defined NO_HIDDEN && defined USE_LDCONFIG
+ # define __hidden_proto_hiddenattr(attrs...) \
+ __attribute__ ((visibility ("hidden"), ##attrs))
+ # define hidden_proto(name, attrs...) \