Date: Thu, 25 Jul 2024 16:25:09 GMT From: Michal Meloun <mmel@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 5670b8cc3672 - main - libthr: Preresolve selected EABI symbols on arm. Message-ID: <202407251625.46PGP9VR019091@gitrepo.freebsd.org>
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The branch main has been updated by mmel: URL: https://cgit.FreeBSD.org/src/commit/?id=5670b8cc3672d5a6bc2c41eb48d7d01343c43ad0 commit 5670b8cc3672d5a6bc2c41eb48d7d01343c43ad0 Author: Michal Meloun <mmel@FreeBSD.org> AuthorDate: 2024-07-24 15:11:27 +0000 Commit: Michal Meloun <mmel@FreeBSD.org> CommitDate: 2024-07-25 16:24:22 +0000 libthr: Preresolve selected EABI symbols on arm. Add the ability to pre-resolve architecture-specific EABI symbols and use it on arm for selected EABI functions. These functions can be called with rtld bind lock write-locked, so they should be resolved in forward. Reported by: Mark Millard <marklmi@yahoo.com>, John F Carr <jfc@mit.edu> Reviewed by: kib, imp MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D46104 --- lib/libthr/arch/aarch64/include/pthread_md.h | 5 +++ lib/libthr/arch/amd64/include/pthread_md.h | 5 +++ lib/libthr/arch/arm/Makefile.inc | 3 ++ lib/libthr/arch/arm/thr_rtld_arm.c | 67 ++++++++++++++++++++++++++++ lib/libthr/arch/i386/include/pthread_md.h | 5 +++ lib/libthr/arch/powerpc/include/pthread_md.h | 5 +++ lib/libthr/arch/riscv/include/pthread_md.h | 5 +++ lib/libthr/thread/thr_private.h | 1 + lib/libthr/thread/thr_rtld.c | 3 ++ 9 files changed, 99 insertions(+) diff --git a/lib/libthr/arch/aarch64/include/pthread_md.h b/lib/libthr/arch/aarch64/include/pthread_md.h index 75e6abf445ba..305abed55d3c 100644 --- a/lib/libthr/arch/aarch64/include/pthread_md.h +++ b/lib/libthr/arch/aarch64/include/pthread_md.h @@ -49,4 +49,9 @@ _get_curthread(void) return (_tcb_get()->tcb_thread); } +static __inline void +_thr_resolve_machdep(void) +{ +} + #endif /* _PTHREAD_MD_H_ */ diff --git a/lib/libthr/arch/amd64/include/pthread_md.h b/lib/libthr/arch/amd64/include/pthread_md.h index 995f35cb569c..85517c1aee70 100644 --- a/lib/libthr/arch/amd64/include/pthread_md.h +++ b/lib/libthr/arch/amd64/include/pthread_md.h @@ -52,4 +52,9 @@ _get_curthread(void) return (thr); } +static __inline void +_thr_resolve_machdep(void) +{ +} + #endif diff --git a/lib/libthr/arch/arm/Makefile.inc b/lib/libthr/arch/arm/Makefile.inc new file mode 100644 index 000000000000..4e770cf6b90f --- /dev/null +++ b/lib/libthr/arch/arm/Makefile.inc @@ -0,0 +1,3 @@ +.PATH: ${.CURDIR}/arch/arm +SRCS+= \ + thr_rtld_arm.c diff --git a/lib/libthr/arch/arm/thr_rtld_arm.c b/lib/libthr/arch/arm/thr_rtld_arm.c new file mode 100644 index 000000000000..35f5fe56cfff --- /dev/null +++ b/lib/libthr/arch/arm/thr_rtld_arm.c @@ -0,0 +1,67 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2024, Michal Meloun <mmel@freebsd.org> + * + * 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 unmodified, 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 ``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 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 <stdlib.h> +#include <string.h> + +#include "thr_private.h" + +int __aeabi_idiv(int , int ); +unsigned __aeabi_uidiv(unsigned, unsigned ); + +struct {int q; int r;} __aeabi_idivmod(int, int ); +struct {unsigned q; unsigned r;} __aeabi_uidivmod(unsigned, unsigned); + +struct {int64_t q; int64_t r;} __aeabi_ldivmod(int64_t, int64_t); +struct {uint64_t q; uint64_t r;} __aeabi_uldivmod(uint64_t, uint64_t); + +void __aeabi_memset(void *dest, size_t n, int c); +void __aeabi_memclr(void *dest, size_t n); +void __aeabi_memmove(void *dest, void *src, size_t n); +void __aeabi_memcpy(void *dest, void *src, size_t n); +void __aeabi_memcmp(void *dest, void *src, size_t n); + +void +_thr_resolve_machdep(void) +{ + char tmp[2]; + + __aeabi_idiv(1, 1); + __aeabi_uidiv(1, 1); + + __aeabi_idivmod(1, 1); + __aeabi_uidivmod(1, 1); + + __aeabi_ldivmod(1, 1); + __aeabi_uldivmod(1, 1); + + __aeabi_memset(tmp, 1, 0); + __aeabi_memclr(tmp, 1); + __aeabi_memmove(tmp, tmp + 1, 1); + __aeabi_memcpy(tmp, tmp + 1, 1); + __aeabi_memcmp(tmp, tmp + 1, 1); +} diff --git a/lib/libthr/arch/i386/include/pthread_md.h b/lib/libthr/arch/i386/include/pthread_md.h index 9008a4f11bdb..7e2c8d7330fc 100644 --- a/lib/libthr/arch/i386/include/pthread_md.h +++ b/lib/libthr/arch/i386/include/pthread_md.h @@ -52,4 +52,9 @@ _get_curthread(void) return (thr); } +static __inline void +_thr_resolve_machdep(void) +{ +} + #endif diff --git a/lib/libthr/arch/powerpc/include/pthread_md.h b/lib/libthr/arch/powerpc/include/pthread_md.h index 89fae48328cb..a5bc0265ed3a 100644 --- a/lib/libthr/arch/powerpc/include/pthread_md.h +++ b/lib/libthr/arch/powerpc/include/pthread_md.h @@ -49,4 +49,9 @@ _get_curthread(void) return (NULL); } +static __inline void +_thr_resolve_machdep(void) +{ +} + #endif /* _PTHREAD_MD_H_ */ diff --git a/lib/libthr/arch/riscv/include/pthread_md.h b/lib/libthr/arch/riscv/include/pthread_md.h index 343f4cae8486..baddfe3ecb22 100644 --- a/lib/libthr/arch/riscv/include/pthread_md.h +++ b/lib/libthr/arch/riscv/include/pthread_md.h @@ -56,4 +56,9 @@ _get_curthread(void) return (NULL); } +static __inline void +_thr_resolve_machdep(void) +{ +} + #endif /* _PTHREAD_MD_H_ */ diff --git a/lib/libthr/thread/thr_private.h b/lib/libthr/thread/thr_private.h index de65e8e7353d..023558100e2a 100644 --- a/lib/libthr/thread/thr_private.h +++ b/lib/libthr/thread/thr_private.h @@ -1103,6 +1103,7 @@ int __Tthr_mutex_trylock(pthread_mutex_t *); bool __thr_get_main_stack_base(char **base); bool __thr_get_main_stack_lim(size_t *lim); int _Tthr_sigqueue(pthread_t pthread, int sig, const union sigval value); +void _thr_resolve_machdep(void); __END_DECLS __NULLABILITY_PRAGMA_POP diff --git a/lib/libthr/thread/thr_rtld.c b/lib/libthr/thread/thr_rtld.c index 25ecb83a11a3..68a02e9aca1b 100644 --- a/lib/libthr/thread/thr_rtld.c +++ b/lib/libthr/thread/thr_rtld.c @@ -276,6 +276,9 @@ _thr_rtld_init(void) _thr_signal_block_check_fast(); _thr_signal_block_setup(curthread); + /* resolve machine depended functions, if any */ + _thr_resolve_machdep(); + uc_len = __getcontextx_size(); uc = alloca(uc_len); getcontext(uc);
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