git: 06d8a116bd6b - main - libc: add _get_tp() private function
Konstantin Belousov
kib at FreeBSD.org
Fri Apr 9 20:47:12 UTC 2021
The branch main has been updated by kib:
URL: https://cgit.FreeBSD.org/src/commit/?id=06d8a116bd6b6f70b8aedc6a6a2c4085c53f63ac
commit 06d8a116bd6b6f70b8aedc6a6a2c4085c53f63ac
Author: Konstantin Belousov <kib at FreeBSD.org>
AuthorDate: 2021-04-05 03:30:35 +0000
Commit: Konstantin Belousov <kib at FreeBSD.org>
CommitDate: 2021-04-09 20:46:24 +0000
libc: add _get_tp() private function
which returns pointer to tcb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29623
---
lib/libc/aarch64/gen/Makefile.inc | 1 +
lib/libc/aarch64/gen/_get_tp.c | 45 +++++++++++++++
lib/libc/amd64/gen/Makefile.inc | 2 +-
lib/libc/amd64/gen/_get_tp.c | 46 ++++++++++++++++
lib/libc/arm/gen/Makefile.inc | 1 +
lib/libc/arm/gen/_get_tp.c | 46 ++++++++++++++++
lib/libc/i386/gen/Makefile.inc | 2 +-
lib/libc/i386/gen/_get_tp.c | 45 +++++++++++++++
lib/libc/include/libc_private.h | 3 +-
lib/libc/mips/gen/Makefile.inc | 2 +-
lib/libc/mips/gen/_get_tp.c | 103 +++++++++++++++++++++++++++++++++++
lib/libc/powerpc/gen/Makefile.common | 4 +-
lib/libc/powerpc/gen/_get_tp.c | 47 ++++++++++++++++
lib/libc/powerpc64/gen/Makefile.inc | 3 +-
lib/libc/powerpc64/gen/_get_tp.c | 47 ++++++++++++++++
lib/libc/riscv/gen/Makefile.inc | 3 +
lib/libc/riscv/gen/_get_tp.c | 47 ++++++++++++++++
17 files changed, 441 insertions(+), 6 deletions(-)
diff --git a/lib/libc/aarch64/gen/Makefile.inc b/lib/libc/aarch64/gen/Makefile.inc
index fe39136f5b41..7c530b93b4e4 100644
--- a/lib/libc/aarch64/gen/Makefile.inc
+++ b/lib/libc/aarch64/gen/Makefile.inc
@@ -7,6 +7,7 @@ SRCS+= _ctx_start.S \
flt_rounds.c \
fpgetmask.c \
fpsetmask.c \
+ _get_tp.c \
infinity.c \
ldexp.c \
makecontext.c \
diff --git a/lib/libc/aarch64/gen/_get_tp.c b/lib/libc/aarch64/gen/_get_tp.c
new file mode 100644
index 000000000000..ce51b400b542
--- /dev/null
+++ b/lib/libc/aarch64/gen/_get_tp.c
@@ -0,0 +1,45 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <string.h>
+#include <stdint.h>
+#include "libc_private.h"
+
+void *
+_get_tp(void)
+{
+ void *res;
+
+ __asm __volatile("mrs %0, tpidr_el0" : "=r" (res));
+ return (res);
+}
diff --git a/lib/libc/amd64/gen/Makefile.inc b/lib/libc/amd64/gen/Makefile.inc
index 30fb05f89cb7..4df3c044493e 100644
--- a/lib/libc/amd64/gen/Makefile.inc
+++ b/lib/libc/amd64/gen/Makefile.inc
@@ -1,7 +1,7 @@
# @(#)Makefile.inc 8.1 (Berkeley) 6/4/93
# $FreeBSD$
-SRCS+= _setjmp.S _set_tp.c rfork_thread.S setjmp.S sigsetjmp.S \
+SRCS+= _setjmp.S _get_tp.c _set_tp.c rfork_thread.S setjmp.S sigsetjmp.S \
fabs.S \
infinity.c ldexp.c makecontext.c signalcontext.c \
flt_rounds.c fpgetmask.c fpsetmask.c fpgetprec.c fpsetprec.c \
diff --git a/lib/libc/amd64/gen/_get_tp.c b/lib/libc/amd64/gen/_get_tp.c
new file mode 100644
index 000000000000..3c74b9e769c1
--- /dev/null
+++ b/lib/libc/amd64/gen/_get_tp.c
@@ -0,0 +1,46 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <string.h>
+#include <stdint.h>
+#include "libc_private.h"
+
+void *
+_get_tp(void)
+{
+ void **res;
+
+ /* This function is used by rtld, avoid ifuncs. */
+ __asm __volatile("movq %%fs:0, %0" : "=r" (res));
+ return (&res[1]);
+}
diff --git a/lib/libc/arm/gen/Makefile.inc b/lib/libc/arm/gen/Makefile.inc
index 6cc9b69d2b0e..35aa465e4904 100644
--- a/lib/libc/arm/gen/Makefile.inc
+++ b/lib/libc/arm/gen/Makefile.inc
@@ -4,6 +4,7 @@
SRCS+= \
__aeabi_read_tp.S \
_ctx_start.S \
+ _get_tp.c \
_set_tp.c \
_setjmp.S \
alloca.S \
diff --git a/lib/libc/arm/gen/_get_tp.c b/lib/libc/arm/gen/_get_tp.c
new file mode 100644
index 000000000000..495fa982dd6f
--- /dev/null
+++ b/lib/libc/arm/gen/_get_tp.c
@@ -0,0 +1,46 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <string.h>
+#include <stdint.h>
+#include "libc_private.h"
+
+void *
+_get_tp(void)
+{
+ void *res;
+
+ __asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (res));
+ return (res);
+}
diff --git a/lib/libc/i386/gen/Makefile.inc b/lib/libc/i386/gen/Makefile.inc
index 45e69cad1d0f..bad73852f6eb 100644
--- a/lib/libc/i386/gen/Makefile.inc
+++ b/lib/libc/i386/gen/Makefile.inc
@@ -1,6 +1,6 @@
# @(#)Makefile.inc 8.1 (Berkeley) 6/4/93
# $FreeBSD$
-SRCS+= _ctx_start.S _setjmp.S _set_tp.c fabs.S \
+SRCS+= _ctx_start.S _setjmp.S _set_tp.c _get_tp.c fabs.S \
flt_rounds.c infinity.c ldexp.c makecontext.c \
rfork_thread.S setjmp.S signalcontext.c sigsetjmp.S
diff --git a/lib/libc/i386/gen/_get_tp.c b/lib/libc/i386/gen/_get_tp.c
new file mode 100644
index 000000000000..f96695247928
--- /dev/null
+++ b/lib/libc/i386/gen/_get_tp.c
@@ -0,0 +1,45 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <string.h>
+#include <stdint.h>
+#include "libc_private.h"
+
+void *
+_get_tp(void)
+{
+ void **res;
+
+ __asm __volatile("movl %%gs:0, %0" : "=r" (res));
+ return (&res[1]);
+}
diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h
index 363e1057986b..5a524c0211d1 100644
--- a/lib/libc/include/libc_private.h
+++ b/lib/libc/include/libc_private.h
@@ -261,8 +261,9 @@ void _init_tls(void);
int _once(pthread_once_t *, void (*)(void));
/*
- * Set the TLS thread pointer
+ * Get/set the TLS thread pointer
*/
+void *_get_tp(void);
void _set_tp(void *tp);
/*
diff --git a/lib/libc/mips/gen/Makefile.inc b/lib/libc/mips/gen/Makefile.inc
index 56fa380f7777..d2dc9b5f4bdb 100644
--- a/lib/libc/mips/gen/Makefile.inc
+++ b/lib/libc/mips/gen/Makefile.inc
@@ -6,6 +6,6 @@ SRCS+= infinity.c fabs.c ldexp.c flt_rounds.c
# SRCS+= flt_rounds.c fpgetmask.c fpgetround.c fpgetsticky.c fpsetmask.c \
# fpsetround.c fpsetsticky.c
-SRCS+= _ctx_start.S _set_tp.c _setjmp.S makecontext.c \
+SRCS+= _ctx_start.S _get_tp.c _set_tp.c _setjmp.S makecontext.c \
setjmp.S signalcontext.c sigsetjmp.S \
trivial-getcontextx.c
diff --git a/lib/libc/mips/gen/_get_tp.c b/lib/libc/mips/gen/_get_tp.c
new file mode 100644
index 000000000000..45c5f8f35d42
--- /dev/null
+++ b/lib/libc/mips/gen/_get_tp.c
@@ -0,0 +1,103 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdint.h>
+#include <machine/sysarch.h>
+#include <machine/tls.h>
+
+#include "libc_private.h"
+
+#ifdef __mips_n64
+static void *
+_mips_get_tls(void)
+{
+ uint64_t _rv;
+
+ __asm__ __volatile__ (
+ ".set\tpush\n\t"
+ ".set\tmips64r2\n\t"
+ "rdhwr\t%0, $29\n\t"
+ ".set\tpop"
+ : "=r" (_rv));
+ /*
+ * XXXSS See 'git show c6be4f4d2d1b71c04de5d3bbb6933ce2dbcdb317'
+ *
+ * Remove the offset since this really a request to get the TLS
+ * pointer via sysarch() (in theory). Of course, this may go away
+ * once the TLS code is rewritten.
+ */
+ _rv = _rv - TLS_TP_OFFSET - TLS_TCB_SIZE;
+
+ return (void *)_rv;
+}
+
+#else /* mips 32 */
+
+static void *
+_mips_get_tls(void)
+{
+ uint32_t _rv;
+
+ __asm__ __volatile__ (
+ ".set\tpush\n\t"
+ ".set\tmips32r2\n\t"
+ "rdhwr\t%0, $29\n\t"
+ ".set\tpop"
+ : "=r" (_rv));
+ /*
+ * XXXSS See 'git show c6be4f4d2d1b71c04de5d3bbb6933ce2dbcdb317'
+ *
+ * Remove the offset since this really a request to get the TLS
+ * pointer via sysarch() (in theory). Of course, this may go away
+ * once the TLS code is rewritten.
+ */
+ _rv = _rv - TLS_TP_OFFSET - TLS_TCB_SIZE;
+
+ return (void *)_rv;
+}
+#endif /* ! __mips_n64 */
+
+void *
+_get_tp(void)
+{
+ void *res;
+
+#ifdef TLS_USE_SYSARCH
+ sysarch(MIPS_GET_TLS, &res);
+#else
+ res = _mips_get_tls();
+#endif
+ return (res);
+}
diff --git a/lib/libc/powerpc/gen/Makefile.common b/lib/libc/powerpc/gen/Makefile.common
index 4ba72799a5cf..b2f898c9faae 100644
--- a/lib/libc/powerpc/gen/Makefile.common
+++ b/lib/libc/powerpc/gen/Makefile.common
@@ -3,4 +3,6 @@
.PATH: ${LIBC_SRCTOP}/powerpc/gen
SRCS += _ctx_start.S eabi.S infinity.c ldexp.c makecontext.c \
- signalcontext.c syncicache.c _set_tp.c trivial-getcontextx.c
+ signalcontext.c syncicache.c _get_tp.c _set_tp.c trivial-getcontextx.c
+
+CFLAGS._get_tp.c+= ${RTLD_HDRS}
diff --git a/lib/libc/powerpc/gen/_get_tp.c b/lib/libc/powerpc/gen/_get_tp.c
new file mode 100644
index 000000000000..0d08b707ff1a
--- /dev/null
+++ b/lib/libc/powerpc/gen/_get_tp.c
@@ -0,0 +1,47 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdint.h>
+#include "libc_private.h"
+#include "rtld.h"
+
+void *
+_get_tp(void)
+{
+ Elf_Addr tp;
+
+ __asm __volatile("mr %0,2" : "=r" (tp));
+ return ((void *)(tp - TLS_TP_OFFSET - TLS_TCB_SIZE));
+}
diff --git a/lib/libc/powerpc64/gen/Makefile.inc b/lib/libc/powerpc64/gen/Makefile.inc
index 864fb9ede4f4..0e40aee2d11f 100644
--- a/lib/libc/powerpc64/gen/Makefile.inc
+++ b/lib/libc/powerpc64/gen/Makefile.inc
@@ -1,10 +1,11 @@
# $FreeBSD$
SRCS += _ctx_start.S fabs.S flt_rounds.c fpgetmask.c fpgetround.c \
- fpgetsticky.c fpsetmask.c fpsetround.c \
+ fpgetsticky.c fpsetmask.c fpsetround.c _get_tp.c \
infinity.c ldexp.c makecontext.c _setjmp.S \
setjmp.S sigsetjmp.S signalcontext.c syncicache.c \
_set_tp.c \
trivial-getcontextx.c
+CFLAGS._get_tp.c+= ${RTLD_HDRS}
diff --git a/lib/libc/powerpc64/gen/_get_tp.c b/lib/libc/powerpc64/gen/_get_tp.c
new file mode 100644
index 000000000000..16f5c952276e
--- /dev/null
+++ b/lib/libc/powerpc64/gen/_get_tp.c
@@ -0,0 +1,47 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdint.h>
+#include "libc_private.h"
+#include "rtld.h"
+
+void *
+_get_tp(void)
+{
+ Elf_Addr tp;
+
+ __asm __volatile("mr %0,13" : "=r" (tp));
+ return ((void *)(tp - TLS_TP_OFFSET - TLS_TCB_SIZE));
+}
diff --git a/lib/libc/riscv/gen/Makefile.inc b/lib/libc/riscv/gen/Makefile.inc
index f13800829d7f..1c1a90bda730 100644
--- a/lib/libc/riscv/gen/Makefile.inc
+++ b/lib/libc/riscv/gen/Makefile.inc
@@ -5,6 +5,7 @@ SRCS+= _ctx_start.S \
flt_rounds.c \
fpgetmask.c \
fpsetmask.c \
+ _get_tp.c \
infinity.c \
ldexp.c \
makecontext.c \
@@ -13,3 +14,5 @@ SRCS+= _ctx_start.S \
setjmp.S \
sigsetjmp.S \
trivial-getcontextx.c
+
+CFLAGS._get_tp.c+= ${RTLD_HDRS}
diff --git a/lib/libc/riscv/gen/_get_tp.c b/lib/libc/riscv/gen/_get_tp.c
new file mode 100644
index 000000000000..0477e3ab8ca9
--- /dev/null
+++ b/lib/libc/riscv/gen/_get_tp.c
@@ -0,0 +1,47 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 The FreeBSD Foundation
+ *
+ * This software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdint.h>
+#include "libc_private.h"
+#include "rtld.h"
+
+void *
+_get_tp(void)
+{
+ Elf_Addr tp;
+
+ __asm __volatile("mv %0, tp" : "=r" (tp));
+ return ((void *)(tp - TLS_TP_OFFSET - TLS_TCB_SIZE));
+}
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