ee55d560e8
To avoid annoyng messages from glibc-2.35 test suite add the simple implementation of rseq syscall which is do nothing for now. I plan to implement it if and when the API stabilizes. MFC after: 2 weeks
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2022 Dmitry Chagin <dchagin@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, 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 <sys/systm.h>
|
|
|
|
#ifdef COMPAT_LINUX32
|
|
#include <machine/../linux32/linux.h>
|
|
#include <machine/../linux32/linux32_proto.h>
|
|
#else
|
|
#include <machine/../linux/linux.h>
|
|
#include <machine/../linux/linux_proto.h>
|
|
#endif
|
|
|
|
|
|
enum linux_rseq_cpu_id_state {
|
|
LINUX_RSEQ_CPU_ID_UNINITIALIZED = -1,
|
|
LINUX_RSEQ_CPU_ID_REGISTRATION_FAILED = -2,
|
|
};
|
|
|
|
enum linux_rseq_flags {
|
|
LINUX_RSEQ_FLAG_UNREGISTER = (1 << 0),
|
|
};
|
|
|
|
enum linux_rseq_cs_flags_bit {
|
|
LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT = 0,
|
|
LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT = 1,
|
|
LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT = 2,
|
|
};
|
|
|
|
enum linux_rseq_cs_flags {
|
|
LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT =
|
|
(1U << LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT),
|
|
LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL =
|
|
(1U << LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT),
|
|
LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE =
|
|
(1U << LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT),
|
|
};
|
|
|
|
struct linux_rseq_cs {
|
|
uint32_t version;
|
|
uint32_t flags;
|
|
uint64_t start_ip;
|
|
uint64_t post_commit_offset;
|
|
uint64_t abort_ip;
|
|
} __attribute__((aligned(4 * sizeof(uint64_t))));
|
|
|
|
struct linux_rseq {
|
|
uint32_t cpu_id_start;
|
|
uint32_t cpu_id;
|
|
uint64_t rseq_cs;
|
|
uint32_t flags;
|
|
} __attribute__((aligned(4 * sizeof(uint64_t))));
|
|
|
|
int
|
|
linux_rseq(struct thread *td, struct linux_rseq_args *args)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|