/* $NetBSD: csan.h,v 1.2 2019/11/06 06:57:22 maxv Exp $ */ /* * Copyright (c) 2019 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Maxime Villard. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 #include #include static inline bool kcsan_md_unsupported(vm_offset_t addr) { return false; } static inline bool kcsan_md_is_avail(void) { return true; } static inline void kcsan_md_disable_intrs(uint64_t *state) { *state = intr_disable(); } static inline void kcsan_md_enable_intrs(uint64_t *state) { intr_restore(*state); } static inline void kcsan_md_delay(uint64_t us) { DELAY(us); } static void kcsan_md_unwind(void) { #ifdef DDB c_db_sym_t sym; db_expr_t offset; const char *symname; #endif struct unwind_state frame; uintptr_t sp; int nsym; __asm __volatile("mov %0, sp" : "=&r" (sp)); frame.sp = sp; frame.fp = (uintptr_t)__builtin_frame_address(0); frame.pc = (uintptr_t)kcsan_md_unwind; nsym = 0; while (1) { if (!unwind_frame(curthread, &frame)) break; if (!INKERNEL((vm_offset_t)frame.pc)) break; #ifdef DDB sym = db_search_symbol((vm_offset_t)frame.pc, DB_STGY_PROC, &offset); db_symbol_values(sym, &symname, NULL); printf("#%d %p in %s+%#lx\n", nsym, (void *)frame.pc, symname, offset); #else printf("#%d %p\n", nsym, (void *)frame.pc); #endif nsym++; if (nsym >= 15) { break; } } }