1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2022 Dmitry Chagin <dchagin@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 32 #ifdef COMPAT_LINUX32 33 #include <machine/../linux32/linux.h> 34 #include <machine/../linux32/linux32_proto.h> 35 #else 36 #include <machine/../linux/linux.h> 37 #include <machine/../linux/linux_proto.h> 38 #endif 39 40 41 enum linux_rseq_cpu_id_state { 42 LINUX_RSEQ_CPU_ID_UNINITIALIZED = -1, 43 LINUX_RSEQ_CPU_ID_REGISTRATION_FAILED = -2, 44 }; 45 46 enum linux_rseq_flags { 47 LINUX_RSEQ_FLAG_UNREGISTER = (1 << 0), 48 }; 49 50 enum linux_rseq_cs_flags_bit { 51 LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT = 0, 52 LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT = 1, 53 LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT = 2, 54 }; 55 56 enum linux_rseq_cs_flags { 57 LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT = 58 (1U << LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT), 59 LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL = 60 (1U << LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT), 61 LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE = 62 (1U << LINUX_RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT), 63 }; 64 65 struct linux_rseq_cs { 66 uint32_t version; 67 uint32_t flags; 68 uint64_t start_ip; 69 uint64_t post_commit_offset; 70 uint64_t abort_ip; 71 } __attribute__((aligned(4 * sizeof(uint64_t)))); 72 73 struct linux_rseq { 74 uint32_t cpu_id_start; 75 uint32_t cpu_id; 76 uint64_t rseq_cs; 77 uint32_t flags; 78 } __attribute__((aligned(4 * sizeof(uint64_t)))); 79 80 int 81 linux_rseq(struct thread *td, struct linux_rseq_args *args) 82 { 83 84 return (ENOSYS); 85 } 86