1 /*- 2 * Copyright (c) 2023-2025 Ruslan Bukin <br@bsdpad.com> 3 * 4 * This work was supported by Innovate UK project 105694, "Digital Security 5 * by Design (DSbD) Technology Platform Prototype". 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _DEV_HWT_HWT_CONTEXT_H_ 30 #define _DEV_HWT_HWT_CONTEXT_H_ 31 32 enum hwt_ctx_state { 33 CTX_STATE_STOPPED, 34 CTX_STATE_RUNNING, 35 }; 36 37 struct hwt_context { 38 TAILQ_HEAD(, hwt_record_entry) records; 39 40 LIST_ENTRY(hwt_context) next_hch; /* Entry in contexthash. */ 41 LIST_ENTRY(hwt_context) next_hwts; /* Entry in ho->hwts. */ 42 43 int mode; 44 int ident; 45 46 int kqueue_fd; 47 struct thread *hwt_td; 48 49 /* CPU mode. */ 50 cpuset_t cpu_map; 51 TAILQ_HEAD(, hwt_cpu) cpus; 52 53 /* Thread mode. */ 54 struct proc *proc; /* Target proc. */ 55 pid_t pid; /* Target pid. */ 56 TAILQ_HEAD(, hwt_thread) threads; 57 int thread_counter; 58 int pause_on_mmap; 59 60 size_t bufsize; /* Trace bufsize for each vm.*/ 61 62 void *config; 63 size_t config_size; 64 int config_version; 65 66 struct hwt_owner *hwt_owner; 67 struct hwt_backend *hwt_backend; 68 69 struct mtx mtx; 70 struct mtx rec_mtx; 71 enum hwt_ctx_state state; 72 int refcnt; 73 }; 74 75 #define HWT_CTX_LOCK(ctx) mtx_lock_spin(&(ctx)->mtx) 76 #define HWT_CTX_UNLOCK(ctx) mtx_unlock_spin(&(ctx)->mtx) 77 #define HWT_CTX_ASSERT_LOCKED(ctx) mtx_assert(&(ctx)->mtx, MA_OWNED) 78 79 int hwt_ctx_alloc(struct hwt_context **ctx0); 80 void hwt_ctx_free(struct hwt_context *ctx); 81 void hwt_ctx_put(struct hwt_context *ctx); 82 83 void hwt_ctx_load(void); 84 void hwt_ctx_unload(void); 85 86 #endif /* !_DEV_HWT_HWT_CONTEXT_H_ */ 87