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-rw-r--r--NEWS10
-rw-r--r--csu/libc-tls.c6
-rw-r--r--elf/dl-tls.c8
-rw-r--r--elf/libc_early_init.c5
-rw-r--r--manual/threads.texi64
-rw-r--r--nptl/pthread_create.c13
-rw-r--r--sysdeps/generic/rseq-internal.h26
-rw-r--r--sysdeps/unix/sysv/linux/Makefile15
-rw-r--r--sysdeps/unix/sysv/linux/Versions1
-rw-r--r--sysdeps/unix/sysv/linux/aarch64/bits/rseq.h43
-rw-r--r--sysdeps/unix/sysv/linux/aarch64/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/alpha/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/arc/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/arm/be/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/arm/bits/rseq.h83
-rw-r--r--sysdeps/unix/sysv/linux/arm/le/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/bits/rseq.h29
-rw-r--r--sysdeps/unix/sysv/linux/csky/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/hppa/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/i386/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/ia64/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/microblaze/be/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/microblaze/le/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/mips/bits/rseq.h62
-rw-r--r--sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/nios2/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/bits/rseq.h37
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/rseq-internal.h73
-rw-r--r--sysdeps/unix/sysv/linux/rseq-sym.c26
-rw-r--r--sysdeps/unix/sysv/linux/s390/bits/rseq.h37
-rw-r--r--sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/sched_getcpu.c22
-rw-r--r--sysdeps/unix/sysv/linux/sh/be/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/sh/le/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/sys/rseq.h203
-rw-r--r--sysdeps/unix/sysv/linux/tst-rseq-nptl.c256
-rw-r--r--sysdeps/unix/sysv/linux/tst-rseq.c64
-rw-r--r--sysdeps/unix/sysv/linux/tst-rseq.h59
-rw-r--r--sysdeps/unix/sysv/linux/x86/bits/rseq.h30
-rw-r--r--sysdeps/unix/sysv/linux/x86_64/64/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist1
54 files changed, 6 insertions, 1197 deletions
diff --git a/NEWS b/NEWS
index 5051e804ea..1ef4a0a7a4 100644
--- a/NEWS
+++ b/NEWS
@@ -42,16 +42,6 @@ Major new features:
pthread_attr_getsigmask_np have been added. They allow applications
to specify the signal mask of a thread created with pthread_create.
-* Support for automatically registering threads with the Linux rseq
- system call has been added. This system call is implemented starting
- from Linux 4.18. The Restartable Sequences ABI accelerates user-space
- operations on per-cpu data. It allows user-space to perform updates
- on per-cpu data without requiring heavy-weight atomic operations.
- Automatically registering threads allows all libraries, including libc,
- to make immediate use of the rseq support by using the documented ABI.
- The GNU C Library manual has details on integration of Restartable
- Sequences.
-
* The GNU C Library now provides the header file <sys/single_threaded.h>
which declares the variable __libc_single_threaded. Applications are
encouraged to use this variable for single-thread optimizations,
diff --git a/csu/libc-tls.c b/csu/libc-tls.c
index 3f1655f264..06e76bd395 100644
--- a/csu/libc-tls.c
+++ b/csu/libc-tls.c
@@ -112,12 +112,6 @@ __libc_setup_tls (void)
size_t tcb_offset;
const ElfW(Phdr) *phdr;
- /* libc.so with rseq has TLS with 32-byte alignment. Static dlopen
- requires at least 32-byte alignment as well, otherwise loading
- libc.so will always fail. */
- if (max_align < 32)
- max_align = 32;
-
struct link_map *main_map = GL(dl_ns)[LM_ID_BASE]._ns_loaded;
/* Look through the TLS segment if there is any. */
diff --git a/elf/dl-tls.c b/elf/dl-tls.c
index 772e70d0f6..9a17427047 100644
--- a/elf/dl-tls.c
+++ b/elf/dl-tls.c
@@ -55,7 +55,7 @@
but come on top when computing the number of namespaces. */
/* Size of initial-exec TLS in libc.so. */
-#define LIBC_IE_TLS 192
+#define LIBC_IE_TLS 160
/* Size of initial-exec TLS in libraries other than libc.so.
This should be large enough to cover runtime libraries of the
compiler such as libgomp and libraries in libc other than libc.so. */
@@ -190,12 +190,6 @@ void
_dl_determine_tlsoffset (void)
{
size_t max_align = TLS_TCB_ALIGN;
- /* libc.so with rseq has TLS with 32-byte alignment. Since TLS is
- initialized before audit modules are loaded and slotinfo
- information is available, this is not taken into account below in
- the audit case. */
- max_align = MAX (max_align, 32U);
-
size_t freetop = 0;
size_t freebottom = 0;
diff --git a/elf/libc_early_init.c b/elf/libc_early_init.c
index 86da66d5e0..725ab2f811 100644
--- a/elf/libc_early_init.c
+++ b/elf/libc_early_init.c
@@ -18,7 +18,6 @@
#include <ctype.h>
#include <libc-early-init.h>
-#include <rseq-internal.h>
#include <sys/single_threaded.h>
void
@@ -27,10 +26,6 @@ __libc_early_init (_Bool initial)
/* Initialize ctype data. */
__ctype_init ();
- /* Register rseq ABI to the kernel for the main program's libc. */
- if (initial)
- rseq_register_current_thread ();
-
/* Only the outer namespace is marked as single-threaded. */
__libc_single_threaded = initial;
}
diff --git a/manual/threads.texi b/manual/threads.texi
index 49f249ec48..4ab0622443 100644
--- a/manual/threads.texi
+++ b/manual/threads.texi
@@ -629,8 +629,6 @@ the standard.
* Waiting with Explicit Clocks:: Functions for waiting with an
explicit clock specification.
* Single-Threaded:: Detecting single-threaded execution.
-* Restartable Sequences:: Linux-specific Restartable Sequences
- integration.
@end menu
@node Default Thread Attributes
@@ -958,68 +956,6 @@ application-created thread because future versions of @theglibc{} may
create background threads after the first thread has been created, and
the application has no way of knowning that these threads are present.
-@node Restartable Sequences
-@subsubsection Restartable Sequences
-
-This section describes Restartable Sequences integration for
-@theglibc{}. This functionality is only available on Linux.
-
-@deftypevar {struct rseq} __rseq_abi
-@standards{Linux, sys/rseq.h}
-@Theglibc{} implements a @code{__rseq_abi} TLS symbol to interact with
-the Restartable Sequences system call. The layout of this structure is
-defined by the @file{sys/rseq.h} header. Registration of each thread's
-@code{__rseq_abi} is performed by @theglibc{} at library initialization
-and thread creation. The manual for the rseq system call can be found
-at @uref{https://git.kernel.org/pub/scm/libs/librseq/librseq.git/tree/doc/man/rseq.2}.
-
-The main executable and shared libraries may either have an undefined
-@code{__rseq_abi} TLS symbol, or define their own, with the same
-declaration as the one present in @file{sys/rseq.h}. The dynamic linker
-will ensure that only one of those available symbols will be used at
-runtime across the process.
-
-If the main executable or shared libraries observe an uninitialized
-@code{__rseq_abi.cpu_id} field (value @code{RSEQ_CPU_ID_UNINITIALIZED}),
-they may perform rseq registration to the kernel: this means either
-glibc was prevented from doing the registration, or an older glibc
-version, which does not include rseq support, is in use. When the main
-executable or a library thus takes ownership of the registration, the
-memory used to hold the @code{__rseq_abi} TLS variable must stay
-allocated, and is not re-used, until the very end of the thread lifetime
-or until an explicit rseq unregistration for that thread is performed.
-It is not recommended to @code{dlclose} libraries owning the
-@code{__rseq_abi} TLS variable.
-
-Users of the @code{__rseq_abi} TLS symbol can store the address of a
-@code{struct rseq_cs} to the @code{__rseq_abi.rseq_cs} TLS variable,
-thus informing the kernel that it enters a Restartable Sequence critical
-section. This pointer and the code areas it itself points to must not
-be left pointing to memory areas which are freed or re-used. Several
-approaches can guarantee this. If the application or library can
-guarantee that the memory used to hold the @code{struct rseq_cs} and the
-code areas it refers to are never freed or re-used, no special action
-must be taken. Else, before that memory is re-used of freed, the
-application is responsible for setting the @code{__rseq_abi.rseq_cs} TLS
-variable to @code{NULL} in each thread's TLS to guarantee that it does
-not leak dangling references. Because the application does not
-typically have knowledge of libraries' use of Restartable Sequences, it
-is recommended that libraries using Restartable Sequences which may end
-up freeing or re-using their memory set the @code{__rseq_abi.rseq_cs}
-TLS variable to @code{NULL} before returning from library functions
-which use Restartable Sequences.
-
-@end deftypevar
-
-@deftypevr Macro int RSEQ_SIG
-@standards{Linux, sys/rseq.h}
-Each supported architecture provides a @code{RSEQ_SIG} macro in
-@file{sys/rseq.h} which contains a signature. That signature is
-expected to be present in the code before each Restartable Sequences
-abort handler. Failure to provide the expected signature may terminate
-the process with a segmentation fault.
-@end deftypevr
-
@c FIXME these are undocumented:
@c pthread_atfork
@c pthread_attr_destroy
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
index e05013e317..2cba3da38c 100644
--- a/nptl/pthread_create.c
+++ b/nptl/pthread_create.c
@@ -33,7 +33,6 @@
#include <default-sched.h>
#include <futex-internal.h>
#include <tls-setup.h>
-#include <rseq-internal.h>
#include "libioP.h"
#include <sys/single_threaded.h>
@@ -386,9 +385,6 @@ START_THREAD_DEFN
/* Initialize pointers to locale data. */
__ctype_init ();
- /* Register rseq TLS to the kernel. */
- rseq_register_current_thread ();
-
#ifndef __ASSUME_SET_ROBUST_LIST
if (__set_robust_list_avail >= 0)
#endif
@@ -585,15 +581,6 @@ START_THREAD_DEFN
process is really dead since 'clone' got passed the CLONE_CHILD_CLEARTID
flag. The 'tid' field in the TCB will be set to zero.
- rseq TLS is still registered at this point. Rely on implicit
- unregistration performed by the kernel on thread teardown. This is not a
- problem because the rseq TLS lives on the stack, and the stack outlives
- the thread. If TCB allocation is ever changed, additional steps may be
- required, such as performing explicit rseq unregistration before
- reclaiming the rseq TLS area memory. It is NOT sufficient to block
- signals because the kernel may write to the rseq area even without
- signals.
-
The exit code is zero since in case all threads exit by calling
'pthread_exit' the exit status must be 0 (zero). */
__exit_thread ();
diff --git a/sysdeps/generic/rseq-internal.h b/sysdeps/generic/rseq-internal.h
deleted file mode 100644
index 16f197397f..0000000000
--- a/sysdeps/generic/rseq-internal.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/* Restartable Sequences internal API. Stub version.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef RSEQ_INTERNAL_H
-#define RSEQ_INTERNAL_H
-
-static inline void
-rseq_register_current_thread (void)
-{
-}
-
-#endif /* rseq-internal.h */
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 1932ccf7df..9b2a253032 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -41,7 +41,7 @@ update-syscall-lists: arch-syscall.h
endif
ifeq ($(subdir),csu)
-sysdep_routines += errno-loc rseq-sym
+sysdep_routines += errno-loc
endif
ifeq ($(subdir),assert)
@@ -94,19 +94,14 @@ sysdep_headers += sys/mount.h sys/acct.h \
bits/types/struct_semid_ds.h \
bits/types/struct_msqid_ds.h \
bits/types/struct_shmid_ds.h \
- bits/ipc-perm.h \
- sys/rseq.h bits/rseq.h
+ bits/ipc-perm.h
tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
tst-quota tst-sync_file_range tst-sysconf-iov_max tst-ttyname \
test-errno-linux tst-memfd_create tst-mlock2 tst-pkey \
tst-rlimit-infinity tst-ofdlocks tst-gettid tst-gettid-kill \
tst-tgkill
-
-# tst-rseq is an internal test because it requires a definition of __NR_rseq
-# from the internal system call list.
-tests-internal += tst-ofdlocks-compat tst-sigcontext-get_pc \
- tst-rseq
+tests-internal += tst-ofdlocks-compat tst-sigcontext-get_pc
CFLAGS-tst-sigcontext-get_pc.c = -fasynchronous-unwind-tables
@@ -307,8 +302,4 @@ endif
ifeq ($(subdir),nptl)
tests += tst-align-clone tst-getpid1
-
-# tst-rseq-nptl is an internal test because it requires a definition of
-# __NR_rseq from the internal system call list.
-tests-internal += tst-rseq-nptl
endif
diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions
index f72741b7e5..c35f783e2a 100644
--- a/sysdeps/unix/sysv/linux/Versions
+++ b/sysdeps/unix/sysv/linux/Versions
@@ -168,7 +168,6 @@ libc {
getdents64; gettid; tgkill;
}
GLIBC_2.32 {
- __rseq_abi;
}
GLIBC_PRIVATE {
# functions used in other libraries
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/rseq.h b/sysdeps/unix/sysv/linux/aarch64/bits/rseq.h
deleted file mode 100644
index b6f6e536f4..0000000000
--- a/sysdeps/unix/sysv/linux/aarch64/bits/rseq.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/* Restartable Sequences Linux aarch64 architecture header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
-#endif
-
-/* RSEQ_SIG is a signature required before each abort handler code.
-
- It is a 32-bit value that maps to actual architecture code compiled
- into applications and libraries. It needs to be defined for each
- architecture. When choosing this value, it needs to be taken into
- account that generating invalid instructions may have ill effects on
- tools like objdump, and may also have impact on the CPU speculative
- execution efficiency in some cases.
-
- aarch64 -mbig-endian generates mixed endianness code vs data:
- little-endian code and big-endian data. Ensure the RSEQ_SIG signature
- matches code endianness. */
-
-#define RSEQ_SIG_CODE 0xd428bc00 /* BRK #0x45E0. */
-
-#ifdef __AARCH64EB__
-# define RSEQ_SIG_DATA 0x00bc28d4 /* BRK #0x45E0. */
-#else
-# define RSEQ_SIG_DATA RSEQ_SIG_CODE
-#endif
-
-#define RSEQ_SIG RSEQ_SIG_DATA
diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
index 008a6c8e52..6cd61988b4 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
@@ -2150,7 +2150,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
index 2cfc5733ed..8edb5deea1 100644
--- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
@@ -2232,7 +2232,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/arc/libc.abilist b/sysdeps/unix/sysv/linux/arc/libc.abilist
index 0d1ce97229..df13f49e15 100644
--- a/sysdeps/unix/sysv/linux/arc/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arc/libc.abilist
@@ -345,7 +345,6 @@ GLIBC_2.32 __res_nclose F
GLIBC_2.32 __res_ninit F
GLIBC_2.32 __res_randomid F
GLIBC_2.32 __res_state F
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 __sbrk F
GLIBC_2.32 __sched_cpualloc F
GLIBC_2.32 __sched_cpucount F
diff --git a/sysdeps/unix/sysv/linux/arm/be/libc.abilist b/sysdeps/unix/sysv/linux/arm/be/libc.abilist
index 0e1677b5a0..7f4a146d22 100644
--- a/sysdeps/unix/sysv/linux/arm/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arm/be/libc.abilist
@@ -134,7 +134,6 @@ GLIBC_2.31 msgctl F
GLIBC_2.31 semctl F
GLIBC_2.31 shmctl F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/arm/bits/rseq.h b/sysdeps/unix/sysv/linux/arm/bits/rseq.h
deleted file mode 100644
index 2bf780efcd..0000000000
--- a/sysdeps/unix/sysv/linux/arm/bits/rseq.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/* Restartable Sequences Linux arm architecture header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
-#endif
-
-/*
- RSEQ_SIG is a signature required before each abort handler code.
-
- It is a 32-bit value that maps to actual architecture code compiled
- into applications and libraries. It needs to be defined for each
- architecture. When choosing this value, it needs to be taken into
- account that generating invalid instructions may have ill effects on
- tools like objdump, and may also have impact on the CPU speculative
- execution efficiency in some cases.
-
- - ARM little endian
-
- RSEQ_SIG uses the udf A32 instruction with an uncommon immediate operand
- value 0x5de3. This traps if user-space reaches this instruction by mistake,
- and the uncommon operand ensures the kernel does not move the instruction
- pointer to attacker-controlled code on rseq abort.
-
- The instruction pattern in the A32 instruction set is:
-
- e7f5def3 udf #24035 ; 0x5de3
-
- This translates to the following instruction pattern in the T16 instruction
- set:
-
- little endian:
- def3 udf #243 ; 0xf3
- e7f5 b.n <7f5>
-
- - ARMv6+ big endian (BE8):
-
- ARMv6+ -mbig-endian generates mixed endianness code vs data: little-endian
- code and big-endian data. The data value of the signature needs to have its
- byte order reversed to generate the trap instruction:
-
- Data: 0xf3def5e7
-
- Translates to this A32 instruction pattern:
-
- e7f5def3 udf #24035 ; 0x5de3
-
- Translates to this T16 instruction pattern:
-
- def3 udf #243 ; 0xf3
- e7f5 b.n <7f5>
-
- - Prior to ARMv6 big endian (BE32):
-
- Prior to ARMv6, -mbig-endian generates big-endian code and data
- (which match), so the endianness of the data representation of the
- signature should not be reversed. However, the choice between BE32
- and BE8 is done by the linker, so we cannot know whether code and
- data endianness will be mixed before the linker is invoked. So rather
- than try to play tricks with the linker, the rseq signature is simply
- data (not a trap instruction) prior to ARMv6 on big endian. This is
- why the signature is expressed as data (.word) rather than as
- instruction (.inst) in assembler. */
-
-#ifdef __ARMEB__
-# define RSEQ_SIG 0xf3def5e7 /* udf #24035 ; 0x5de3 (ARMv6+) */
-#else
-# define RSEQ_SIG 0xe7f5def3 /* udf #24035 ; 0x5de3 */
-#endif
diff --git a/sysdeps/unix/sysv/linux/arm/le/libc.abilist b/sysdeps/unix/sysv/linux/arm/le/libc.abilist
index e544ed75a4..a83cc81958 100644
--- a/sysdeps/unix/sysv/linux/arm/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/arm/le/libc.abilist
@@ -131,7 +131,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/bits/rseq.h b/sysdeps/unix/sysv/linux/bits/rseq.h
deleted file mode 100644
index 014c08fe0f..0000000000
--- a/sysdeps/unix/sysv/linux/bits/rseq.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/* Restartable Sequences architecture header. Stub version.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
-#endif
-
-/* RSEQ_SIG is a signature required before each abort handler code.
-
- It is a 32-bit value that maps to actual architecture code compiled
- into applications and libraries. It needs to be defined for each
- architecture. When choosing this value, it needs to be taken into
- account that generating invalid instructions may have ill effects on
- tools like objdump, and may also have impact on the CPU speculative
- execution efficiency in some cases. */
diff --git a/sysdeps/unix/sysv/linux/csky/libc.abilist b/sysdeps/unix/sysv/linux/csky/libc.abilist
index 6bb8042657..32887b1c58 100644
--- a/sysdeps/unix/sysv/linux/csky/libc.abilist
+++ b/sysdeps/unix/sysv/linux/csky/libc.abilist
@@ -2094,7 +2094,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist
index e0f8f29c40..baf425072b 100644
--- a/sysdeps/unix/sysv/linux/hppa/libc.abilist
+++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist
@@ -2053,7 +2053,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist
index 155dd51e0d..8b0242a9b1 100644
--- a/sysdeps/unix/sysv/linux/i386/libc.abilist
+++ b/sysdeps/unix/sysv/linux/i386/libc.abilist
@@ -2219,7 +2219,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist
index 8cc12aa326..b6ba86dbe9 100644
--- a/sysdeps/unix/sysv/linux/ia64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist
@@ -2085,7 +2085,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
index e02a61591c..e1f7e19de9 100644
--- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
@@ -135,7 +135,6 @@ GLIBC_2.31 msgctl F
GLIBC_2.31 semctl F
GLIBC_2.31 shmctl F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
index 8e90d9744a..2d726097ca 100644
--- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
@@ -2165,7 +2165,6 @@ GLIBC_2.31 msgctl F
GLIBC_2.31 semctl F
GLIBC_2.31 shmctl F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
index 76e402cbf5..7c78649e03 100644
--- a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
@@ -2145,7 +2145,6 @@ GLIBC_2.31 msgctl F
GLIBC_2.31 semctl F
GLIBC_2.31 shmctl F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
index 8528547aa2..da2194b498 100644
--- a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
@@ -2142,7 +2142,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/mips/bits/rseq.h b/sysdeps/unix/sysv/linux/mips/bits/rseq.h
deleted file mode 100644
index fa945fc7c1..0000000000
--- a/sysdeps/unix/sysv/linux/mips/bits/rseq.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/* Restartable Sequences Linux mips architecture header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
-#endif
-
-/* RSEQ_SIG is a signature required before each abort handler code.
-
- It is a 32-bit value that maps to actual architecture code compiled
- into applications and libraries. It needs to be defined for each
- architecture. When choosing this value, it needs to be taken into
- account that generating invalid instructions may have ill effects on
- tools like objdump, and may also have impact on the CPU speculative
- execution efficiency in some cases.
-
- RSEQ_SIG uses the break instruction. The instruction pattern is:
-
- On MIPS:
- 0350000d break 0x350
-
- On nanoMIPS:
- 00100350 break 0x350
-
- On microMIPS:
- 0000d407 break 0x350
-
- For nanoMIPS32 and microMIPS, the instruction stream is encoded as
- 16-bit halfwords, so the signature halfwords need to be swapped
- accordingly for little-endian. */
-
-#if defined (__nanomips__)
-# ifdef __MIPSEL__
-# define RSEQ_SIG 0x03500010
-# else
-# define RSEQ_SIG 0x00100350
-# endif
-#elif defined (__mips_micromips)
-# ifdef __MIPSEL__
-# define RSEQ_SIG 0xd4070000
-# else
-# define RSEQ_SIG 0x0000d407
-# endif
-#elif defined (__mips__)
-# define RSEQ_SIG 0x0350000d
-#else
-/* Unknown MIPS architecture. */
-#endif
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
index 2b838c0c8e..9fa655b3a5 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
@@ -2136,7 +2136,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
index 9cde04785c..3f6da71769 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
@@ -2134,7 +2134,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
index be180e71cf..de990933cf 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
@@ -2142,7 +2142,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
index 8569cfb6cb..754491f209 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
@@ -2136,7 +2136,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist
index bce6c79b9b..36a875115c 100644
--- a/sysdeps/unix/sysv/linux/nios2/libc.abilist
+++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist
@@ -2183,7 +2183,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/rseq.h b/sysdeps/unix/sysv/linux/powerpc/bits/rseq.h
deleted file mode 100644
index 0dc608ebd5..0000000000
--- a/sysdeps/unix/sysv/linux/powerpc/bits/rseq.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Restartable Sequences Linux powerpc architecture header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
-#endif
-
-/* RSEQ_SIG is a signature required before each abort handler code.
-
- It is a 32-bit value that maps to actual architecture code compiled
- into applications and libraries. It needs to be defined for each
- architecture. When choosing this value, it needs to be taken into
- account that generating invalid instructions may have ill effects on
- tools like objdump, and may also have impact on the CPU speculative
- execution efficiency in some cases.
-
- RSEQ_SIG uses the following trap instruction:
-
- powerpc-be: 0f e5 00 0b twui r5,11
- powerpc64-le: 0b 00 e5 0f twui r5,11
- powerpc64-be: 0f e5 00 0b twui r5,11 */
-
-#define RSEQ_SIG 0x0fe5000b
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
index 1d0158a08e..6de9bed51d 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
@@ -2192,7 +2192,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
index f65772cf8a..5c8c58974c 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
@@ -2225,7 +2225,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
index cfe526b916..92114806ac 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
@@ -2055,7 +2055,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
index cbe0cf3d7e..b01fdcfae1 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
@@ -2292,7 +2292,6 @@ GLIBC_2.32 __qecvtieee128_r F
GLIBC_2.32 __qfcvtieee128 F
GLIBC_2.32 __qfcvtieee128_r F
GLIBC_2.32 __qgcvtieee128 F
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 __scanfieee128 F
GLIBC_2.32 __snprintf_chkieee128 F
GLIBC_2.32 __snprintfieee128 F
diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
index b361308505..45cbeb1d98 100644
--- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
@@ -2112,7 +2112,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/rseq-internal.h b/sysdeps/unix/sysv/linux/rseq-internal.h
deleted file mode 100644
index 8f6772ca1d..0000000000
--- a/sysdeps/unix/sysv/linux/rseq-internal.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/* Restartable Sequences internal API. Linux implementation.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef RSEQ_INTERNAL_H
-#define RSEQ_INTERNAL_H
-
-#include <sysdep.h>
-#include <errno.h>
-#include <kernel-features.h>
-#include <stdio.h>
-#include <sys/rseq.h>
-
-#ifdef RSEQ_SIG
-static inline void
-rseq_register_current_thread (void)
-{
- int ret;
-
- if (__rseq_abi.cpu_id != RSEQ_CPU_ID_UNINITIALIZED)
- __libc_fatal ("glibc fatal error: "
- "rseq already initialized for this thread\n");
- ret = INTERNAL_SYSCALL_CALL (rseq, &__rseq_abi, sizeof (struct rseq),
- 0, RSEQ_SIG);
- if (INTERNAL_SYSCALL_ERROR_P (ret))
- {
- const char *msg = NULL;
-
- switch (INTERNAL_SYSCALL_ERRNO (ret))
- {
- case ENOSYS: /* rseq system call not implemented. */
- case EPERM: /* rseq system call filtered by seccomp. */
- case EACCES: /* rseq system call filtered by seccomp. */
- __rseq_abi.cpu_id = RSEQ_CPU_ID_REGISTRATION_FAILED;
- break;
- case EBUSY:
- msg = "glibc fatal error: rseq already registered for this thread\n";
- break;
- case EFAULT:
- msg = "glibc fatal error: rseq parameter is an invalid address\n";
- break;
- case EINVAL:
- msg = "glibc fatal error: rseq parameters are invalid\n";
- break;
- default:
- msg = "glibc fatal error: unexpected rseq errno\n";
- break;
- }
- if (msg != NULL)
- __libc_fatal (msg);
- }
-}
-#else /* RSEQ_SIG */
-static inline void
-rseq_register_current_thread (void)
-{
-}
-#endif /* RSEQ_SIG */
-
-#endif /* rseq-internal.h */
diff --git a/sysdeps/unix/sysv/linux/rseq-sym.c b/sysdeps/unix/sysv/linux/rseq-sym.c
deleted file mode 100644
index 090093408f..0000000000
--- a/sysdeps/unix/sysv/linux/rseq-sym.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/* Restartable Sequences exported symbols. Linux Implementation.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#include <sys/syscall.h>
-#include <stdint.h>
-#include <kernel-features.h>
-#include <sys/rseq.h>
-
-__thread struct rseq __rseq_abi =
- {
- .cpu_id = RSEQ_CPU_ID_UNINITIALIZED,
- };
diff --git a/sysdeps/unix/sysv/linux/s390/bits/rseq.h b/sysdeps/unix/sysv/linux/s390/bits/rseq.h
deleted file mode 100644
index 3d6fd0cfb9..0000000000
--- a/sysdeps/unix/sysv/linux/s390/bits/rseq.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Restartable Sequences Linux s390 architecture header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
-#endif
-
-/* RSEQ_SIG is a signature required before each abort handler code.
-
- It is a 32-bit value that maps to actual architecture code compiled
- into applications and libraries. It needs to be defined for each
- architecture. When choosing this value, it needs to be taken into
- account that generating invalid instructions may have ill effects on
- tools like objdump, and may also have impact on the CPU speculative
- execution efficiency in some cases.
-
- RSEQ_SIG uses the trap4 instruction. As Linux does not make use of the
- access-register mode nor the linkage stack this instruction will always
- cause a special-operation exception (the trap-enabled bit in the DUCT
- is and will stay 0). The instruction pattern is
- b2 ff 0f ff trap4 4095(%r0) */
-
-#define RSEQ_SIG 0xB2FF0FFF
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
index 37e313a1b0..d0752dba6c 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
@@ -2190,7 +2190,6 @@ GLIBC_2.31 msgctl F
GLIBC_2.31 semctl F
GLIBC_2.31 shmctl F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
index 5ff64d8a0a..af5f14d1c6 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
@@ -2091,7 +2091,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/sched_getcpu.c b/sysdeps/unix/sysv/linux/sched_getcpu.c
index c0f992e056..c019cfb3cf 100644
--- a/sysdeps/unix/sysv/linux/sched_getcpu.c
+++ b/sysdeps/unix/sysv/linux/sched_getcpu.c
@@ -18,12 +18,10 @@
#include <errno.h>
#include <sched.h>
#include <sysdep.h>
-#include <atomic.h>
#include <sysdep-vdso.h>
-#include <sys/rseq.h>
-static int
-vsyscall_sched_getcpu (void)
+int
+sched_getcpu (void)
{
unsigned int cpu;
int r = -1;
@@ -34,19 +32,3 @@ vsyscall_sched_getcpu (void)
#endif
return r == -1 ? r : cpu;
}
-
-#ifdef RSEQ_SIG
-int
-sched_getcpu (void)
-{
- int cpu_id = atomic_load_relaxed (&__rseq_abi.cpu_id);
-
- return cpu_id >= 0 ? cpu_id : vsyscall_sched_getcpu ();
-}
-#else /* RSEQ_SIG */
-int
-sched_getcpu (void)
-{
- return vsyscall_sched_getcpu ();
-}
-#endif /* RSEQ_SIG */
diff --git a/sysdeps/unix/sysv/linux/sh/be/libc.abilist b/sysdeps/unix/sysv/linux/sh/be/libc.abilist
index 7e65b3e317..038ce27174 100644
--- a/sysdeps/unix/sysv/linux/sh/be/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sh/be/libc.abilist
@@ -2060,7 +2060,6 @@ GLIBC_2.31 msgctl F
GLIBC_2.31 semctl F
GLIBC_2.31 shmctl F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/sh/le/libc.abilist b/sysdeps/unix/sysv/linux/sh/le/libc.abilist
index 6a3eeed921..182970a708 100644
--- a/sysdeps/unix/sysv/linux/sh/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sh/le/libc.abilist
@@ -2057,7 +2057,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
index 196f7f2543..a2521c3ee3 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
@@ -2181,7 +2181,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
index 2ca03d7062..d8188903f9 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
@@ -2108,7 +2108,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/sys/rseq.h b/sysdeps/unix/sysv/linux/sys/rseq.h
deleted file mode 100644
index 55090f9e30..0000000000
--- a/sysdeps/unix/sysv/linux/sys/rseq.h
+++ /dev/null
@@ -1,203 +0,0 @@
-/* Restartable Sequences exported symbols. Linux header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-#define _SYS_RSEQ_H 1
-
-/* Architecture-specific rseq signature. */
-#include <bits/rseq.h>
-
-#include <stdint.h>
-#include <sys/cdefs.h>
-
-#ifdef __has_include
-# if __has_include ("linux/rseq.h")
-# define __GLIBC_HAVE_KERNEL_RSEQ
-# endif
-#else
-# include <linux/version.h>
-# if LINUX_VERSION_CODE >= KERNEL_VERSION (4, 18, 0)
-# define __GLIBC_HAVE_KERNEL_RSEQ
-# endif
-#endif
-
-/* Rely on GNU extensions for older standards and tls model. */
-#ifdef __GNUC__
-# define __rseq_tls_model_ie __attribute__ ((__tls_model__ ("initial-exec")))
-#else
-/* Specifying the TLS model on the declaration is optional. */
-# define __rseq_tls_model_ie /* Nothing. */
-#endif
-
-#ifdef __cplusplus
-# if __cplusplus >= 201103L
-# define __rseq_tls_storage_class thread_local
-# endif
-#elif (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) >= 201112L
-# define __rseq_tls_storage_class _Thread_local
-#endif
-
-/* Fall back to __thread for TLS storage class. */
-#ifndef __rseq_tls_storage_class
-# define __rseq_tls_storage_class __thread
-#endif
-
-#ifdef __GLIBC_HAVE_KERNEL_RSEQ
-/* We use the structures declarations from the kernel headers. */
-# include <linux/rseq.h>
-#else /* __GLIBC_HAVE_KERNEL_RSEQ */
-/* We use a copy of the include/uapi/linux/rseq.h kernel header. */
-
-# include <asm/byteorder.h>
-
-enum rseq_cpu_id_state
- {
- RSEQ_CPU_ID_UNINITIALIZED = -1,
- RSEQ_CPU_ID_REGISTRATION_FAILED = -2,
- };
-
-enum rseq_flags
- {
- RSEQ_FLAG_UNREGISTER = (1 << 0),
- };
-
-enum rseq_cs_flags_bit
- {
- RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT = 0,
- RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT = 1,
- RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT = 2,
- };
-
-enum rseq_cs_flags
- {
- RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT =
- (1U << RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT),
- RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL =
- (1U << RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT),
- RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE =
- (1U << RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT),
- };
-
-/* struct rseq_cs is aligned on 32 bytes to ensure it is always
- contained within a single cache-line. It is usually declared as
- link-time constant data. */
-struct rseq_cs
- {
- /* Version of this structure. */
- uint32_t version;
- /* enum rseq_cs_flags. */
- uint32_t flags;
- uint64_t start_ip;
- /* Offset from start_ip. */
- uint64_t post_commit_offset;
- uint64_t abort_ip;
- } __attribute__ ((__aligned__ (32)));
-
-/* struct rseq is aligned on 32 bytes to ensure it is always
- contained within a single cache-line.
-
- A single struct rseq per thread is allowed. */
-struct rseq
- {
- /* Restartable sequences cpu_id_start field. Updated by the
- kernel. Read by user-space with single-copy atomicity
- semantics. This field should only be read by the thread which
- registered this data structure. Aligned on 32-bit. Always
- contains a value in the range of possible CPUs, although the
- value may not be the actual current CPU (e.g. if rseq is not
- initialized). This CPU number value should always be compared
- against the value of the cpu_id field before performing a rseq
- commit or returning a value read from a data structure indexed
- using the cpu_id_start value. */
- uint32_t cpu_id_start;
- /* Restartable sequences cpu_id field. Updated by the kernel.
- Read by user-space with single-copy atomicity semantics. This
- field should only be read by the thread which registered this
- data structure. Aligned on 32-bit. Values
- RSEQ_CPU_ID_UNINITIALIZED and RSEQ_CPU_ID_REGISTRATION_FAILED
- have a special semantic: the former means "rseq uninitialized",
- and latter means "rseq initialization failed". This value is
- meant to be read within rseq critical sections and compared
- with the cpu_id_start value previously read, before performing
- the commit instruction, or read and compared with the
- cpu_id_start value before returning a value loaded from a data
- structure indexed using the cpu_id_start value. */
- uint32_t cpu_id;
- /* Restartable sequences rseq_cs field.
-
- Contains NULL when no critical section is active for the current
- thread, or holds a pointer to the currently active struct rseq_cs.
-
- Updated by user-space, which sets the address of the currently
- active rseq_cs at the beginning of assembly instruction sequence
- block, and set to NULL by the kernel when it restarts an assembly
- instruction sequence block, as well as when the kernel detects that
- it is preempting or delivering a signal outside of the range
- targeted by the rseq_cs. Also needs to be set to NULL by user-space
- before reclaiming memory that contains the targeted struct rseq_cs.
-
- Read and set by the kernel. Set by user-space with single-copy
- atomicity semantics. This field should only be updated by the
- thread which registered this data structure. Aligned on 64-bit. */
- union
- {
- uint64_t ptr64;
-# ifdef __LP64__
- uint64_t ptr;
-# else /* __LP64__ */
- struct
- {
-# if (defined (__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)) || defined (__BIG_ENDIAN)
- uint32_t padding; /* Initialized to zero. */
- uint32_t ptr32;
-# else /* LITTLE */
- uint32_t ptr32;
- uint32_t padding; /* Initialized to zero. */
-# endif /* ENDIAN */
- } ptr;
-# endif /* __LP64__ */
- } rseq_cs;
-
- /* Restartable sequences flags field.
-
- This field should only be updated by the thread which
- registered this data structure. Read by the kernel.
- Mainly used for single-stepping through rseq critical sections
- with debuggers.
-
- - RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT
- Inhibit instruction sequence block restart on preemption
- for this thread.
- - RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL
- Inhibit instruction sequence block restart on signal
- delivery for this thread.
- - RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE
- Inhibit instruction sequence block restart on migration for
- this thread. */
- uint32_t flags;
- } __attribute__ ((__aligned__ (32)));
-
-#endif /* __GLIBC_HAVE_KERNEL_RSEQ */
-
-/* Allocations of struct rseq and struct rseq_cs on the heap need to
- be aligned on 32 bytes. Therefore, use of malloc is discouraged
- because it does not guarantee alignment. posix_memalign should be
- used instead. */
-
-extern __rseq_tls_storage_class struct rseq __rseq_abi __rseq_tls_model_ie;
-
-#endif /* sys/rseq.h */
diff --git a/sysdeps/unix/sysv/linux/tst-rseq-nptl.c b/sysdeps/unix/sysv/linux/tst-rseq-nptl.c
deleted file mode 100644
index 5e788dcfa9..0000000000
--- a/sysdeps/unix/sysv/linux/tst-rseq-nptl.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/* Restartable Sequences NPTL test.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-/* These tests validate that rseq is registered from various execution
- contexts (main thread, destructor, other threads, other threads created
- from destructor, forked process (without exec), pthread_atfork handlers,
- pthread setspecific destructors, signal handlers, atexit handlers).
-
- See the Linux kernel selftests for extensive rseq stress-tests. */
-
-#include <stdio.h>
-#include <support/check.h>
-#include <support/xthread.h>
-#include <sys/rseq.h>
-#include <unistd.h>
-
-#ifdef RSEQ_SIG
-# include <array_length.h>
-# include <errno.h>
-# include <error.h>
-# include <pthread.h>
-# include <signal.h>
-# include <stdlib.h>
-# include <string.h>
-# include <support/namespace.h>
-# include <support/xsignal.h>
-# include <syscall.h>
-# include <sys/types.h>
-# include <sys/wait.h>
-# include "tst-rseq.h"
-
-static pthread_key_t rseq_test_key;
-
-static void
-atfork_prepare (void)
-{
- if (!rseq_thread_registered ())
- {
- printf ("error: rseq not registered in pthread atfork prepare\n");
- support_record_failure ();
- }
-}
-
-static void
-atfork_parent (void)
-{
- if (!rseq_thread_registered ())
- {
- printf ("error: rseq not registered in pthread atfork parent\n");
- support_record_failure ();
- }
-}
-
-static void
-atfork_child (void)
-{
- if (!rseq_thread_registered ())
- {
- printf ("error: rseq not registered in pthread atfork child\n");
- support_record_failure ();
- }
-}
-
-static void
-rseq_key_destructor (void *arg)
-{
- /* Cannot use deferred failure reporting after main returns. */
- if (!rseq_thread_registered ())
- FAIL_EXIT1 ("rseq not registered in pthread key destructor");
-}
-
-static void
-atexit_handler (void)
-{
- /* Cannot use deferred failure reporting after main returns. */
- if (!rseq_thread_registered ())
- FAIL_EXIT1 ("rseq not registered in atexit handler");
-}
-
-static void
-do_rseq_main_test (void)
-{
- TEST_COMPARE (atexit (atexit_handler), 0);
- rseq_test_key = xpthread_key_create (rseq_key_destructor);
- TEST_COMPARE (pthread_atfork (atfork_prepare, atfork_parent, atfork_child), 0);
- xraise (SIGUSR1);
- TEST_COMPARE (pthread_setspecific (rseq_test_key, (void *) 1l), 0);
- TEST_VERIFY_EXIT (rseq_thread_registered ());
-}
-
-static void
-cancel_routine (void *arg)
-{
- if (!rseq_thread_registered ())
- {
- printf ("error: rseq not registered in cancel routine\n");
- support_record_failure ();
- }
-}
-
-static pthread_barrier_t cancel_thread_barrier;
-static pthread_cond_t cancel_thread_cond = PTHREAD_COND_INITIALIZER;
-static pthread_mutex_t cancel_thread_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-static void
-test_cancel_thread (void)
-{
- pthread_cleanup_push (cancel_routine, NULL);
- (void) xpthread_barrier_wait (&cancel_thread_barrier);
- /* Wait forever until cancellation. */
- xpthread_cond_wait (&cancel_thread_cond, &cancel_thread_mutex);
- pthread_cleanup_pop (0);
-}
-
-static void *
-thread_function (void * arg)
-{
- int i = (int) (intptr_t) arg;
-
- xraise (SIGUSR1);
- if (i == 0)
- test_cancel_thread ();
- TEST_COMPARE (pthread_setspecific (rseq_test_key, (void *) 1l), 0);
- return rseq_thread_registered () ? NULL : (void *) 1l;
-}
-
-static void
-sighandler (int sig)
-{
- if (!rseq_thread_registered ())
- {
- printf ("error: rseq not registered in signal handler\n");
- support_record_failure ();
- }
-}
-
-static void
-setup_signals (void)
-{
- struct sigaction sa;
-
- sigemptyset (&sa.sa_mask);
- sigaddset (&sa.sa_mask, SIGUSR1);
- sa.sa_flags = 0;
- sa.sa_handler = sighandler;
- xsigaction (SIGUSR1, &sa, NULL);
-}
-
-static int
-do_rseq_threads_test (int nr_threads)
-{
- pthread_t th[nr_threads];
- int i;
- int result = 0;
-
- xpthread_barrier_init (&cancel_thread_barrier, NULL, 2);
-
- for (i = 0; i < nr_threads; ++i)
- th[i] = xpthread_create (NULL, thread_function,
- (void *) (intptr_t) i);
-
- (void) xpthread_barrier_wait (&cancel_thread_barrier);
-
- xpthread_cancel (th[0]);
-
- for (i = 0; i < nr_threads; ++i)
- {
- void *v;
-
- v = xpthread_join (th[i]);
- if (i != 0 && v != NULL)
- {
- printf ("error: join %d successful, but child failed\n", i);
- result = 1;
- }
- else if (i == 0 && v == NULL)
- {
- printf ("error: join %d successful, child did not fail as expected\n", i);
- result = 1;
- }
- }
-
- xpthread_barrier_destroy (&cancel_thread_barrier);
-
- return result;
-}
-
-static void
-subprocess_callback (void *closure)
-{
- do_rseq_main_test ();
-}
-
-static void
-do_rseq_fork_test (void)
-{
- support_isolate_in_subprocess (subprocess_callback, NULL);
-}
-
-static int
-do_rseq_test (void)
-{
- int t[] = { 1, 2, 6, 5, 4, 3, 50 };
- int i, result = 0;
-
- if (!rseq_available ())
- FAIL_UNSUPPORTED ("kernel does not support rseq, skipping test");
- setup_signals ();
- xraise (SIGUSR1);
- do_rseq_main_test ();
- for (i = 0; i < array_length (t); i++)
- if (do_rseq_threads_test (t[i]))
- result = 1;
- do_rseq_fork_test ();
- return result;
-}
-
-static void __attribute__ ((destructor))
-do_rseq_destructor_test (void)
-{
- /* Cannot use deferred failure reporting after main returns. */
- if (do_rseq_test ())
- FAIL_EXIT1 ("rseq not registered within destructor");
- xpthread_key_delete (rseq_test_key);
-}
-
-#else /* RSEQ_SIG */
-static int
-do_rseq_test (void)
-{
- FAIL_UNSUPPORTED ("glibc does not define RSEQ_SIG, skipping test");
- return 0;
-}
-#endif /* RSEQ_SIG */
-
-static int
-do_test (void)
-{
- return do_rseq_test ();
-}
-
-#include <support/test-driver.c>
diff --git a/sysdeps/unix/sysv/linux/tst-rseq.c b/sysdeps/unix/sysv/linux/tst-rseq.c
deleted file mode 100644
index aa902fb26a..0000000000
--- a/sysdeps/unix/sysv/linux/tst-rseq.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/* Restartable Sequences single-threaded tests.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-/* These tests validate that rseq is registered from main in an executable
- not linked against libpthread. */
-
-#include <support/check.h>
-#include <stdio.h>
-#include <sys/rseq.h>
-#include <unistd.h>
-
-#ifdef RSEQ_SIG
-# include <errno.h>
-# include <error.h>
-# include <stdlib.h>
-# include <string.h>
-# include <syscall.h>
-# include "tst-rseq.h"
-
-static void
-do_rseq_main_test (void)
-{
- TEST_VERIFY_EXIT (rseq_thread_registered ());
-}
-
-static void
-do_rseq_test (void)
-{
- if (!rseq_available ())
- {
- FAIL_UNSUPPORTED ("kernel does not support rseq, skipping test");
- }
- do_rseq_main_test ();
-}
-#else /* RSEQ_SIG */
-static void
-do_rseq_test (void)
-{
- FAIL_UNSUPPORTED ("glibc does not define RSEQ_SIG, skipping test");
-}
-#endif /* RSEQ_SIG */
-
-static int
-do_test (void)
-{
- do_rseq_test ();
- return 0;
-}
-
-#include <support/test-driver.c>
diff --git a/sysdeps/unix/sysv/linux/tst-rseq.h b/sysdeps/unix/sysv/linux/tst-rseq.h
deleted file mode 100644
index c2cb211f56..0000000000
--- a/sysdeps/unix/sysv/linux/tst-rseq.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/* Restartable Sequences tests header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#include <errno.h>
-#include <error.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <support/check.h>
-#include <syscall.h>
-#include <sys/rseq.h>
-
-static inline bool
-rseq_thread_registered (void)
-{
- int32_t v;
-
- __atomic_load (&__rseq_abi.cpu_id, &v, __ATOMIC_RELAXED);
- return v >= 0;
-}
-
-static inline int
-sys_rseq (struct rseq *rseq_abi, uint32_t rseq_len, int flags, uint32_t sig)
-{
- return syscall (__NR_rseq, rseq_abi, rseq_len, flags, sig);
-}
-
-static inline bool
-rseq_available (void)
-{
- int rc;
-
- rc = sys_rseq (NULL, 0, 0, 0);
- if (rc != -1)
- FAIL_EXIT1 ("Unexpected rseq return value %d", rc);
- switch (errno)
- {
- case ENOSYS:
- return false;
- case EINVAL:
- /* rseq is implemented, but detected an invalid rseq_len parameter. */
- return true;
- default:
- FAIL_EXIT1 ("Unexpected rseq error %s", strerror (errno));
- }
-}
diff --git a/sysdeps/unix/sysv/linux/x86/bits/rseq.h b/sysdeps/unix/sysv/linux/x86/bits/rseq.h
deleted file mode 100644
index f801d5d0a1..0000000000
--- a/sysdeps/unix/sysv/linux/x86/bits/rseq.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/* Restartable Sequences Linux x86 architecture header.
- Copyright (C) 2020 Free Software Foundation, Inc.
-
- 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
- <https://www.gnu.org/licenses/>. */
-
-#ifndef _SYS_RSEQ_H
-# error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead."
-#endif
-
-/* RSEQ_SIG is a signature required before each abort handler code.
-
- RSEQ_SIG is used with the following reserved undefined instructions, which
- trap in user-space:
-
- x86-32: 0f b9 3d 53 30 05 53 ud1 0x53053053,%edi
- x86-64: 0f b9 3d 53 30 05 53 ud1 0x53053053(%rip),%edi */
-
-#define RSEQ_SIG 0x53053053
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
index 86a481be42..1a96103c68 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
@@ -2066,7 +2066,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
index 056de03ae3..35745a75b6 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
@@ -2163,7 +2163,6 @@ GLIBC_2.30 gettid F
GLIBC_2.30 tgkill F
GLIBC_2.30 twalk_r F
GLIBC_2.32 __libc_single_threaded D 0x1
-GLIBC_2.32 __rseq_abi T 0x20
GLIBC_2.32 pthread_attr_getsigmask_np F
GLIBC_2.32 pthread_attr_setaffinity_np F
GLIBC_2.32 pthread_attr_setsigmask_np F