1 // SPDX-License-Identifier: BSD-2-Clause 2 /*- 3 * Copyright (c) 2015-2019 Linaro Limited 4 * Copyright (c) 2015 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Semihalf under 8 * the sponsorship of the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <compiler.h> 33 #include <string.h> 34 #include <trace.h> 35 #include <types_ext.h> 36 #include <unw/unwind.h> 37 38 void __weak ftrace_map_lr(uint64_t *lr __unused) 39 {} 40 41 static bool copy_in_reg(uint64_t *reg, vaddr_t addr) 42 { 43 memcpy(reg, (void *)addr, sizeof(*reg)); 44 return true; 45 } 46 47 bool unwind_stack_arm64(struct unwind_state_arm64 *frame, 48 vaddr_t stack, size_t stack_size) 49 { 50 vaddr_t fp = frame->fp; 51 52 if (fp < stack) 53 return false; 54 if (fp + sizeof(uint64_t) * 3 > stack + stack_size) 55 return false; 56 57 frame->sp = fp + 0x10; 58 /* FP to previous frame (X29) */ 59 if (!copy_in_reg(&frame->fp, fp)) 60 return false; 61 if (!frame->fp) 62 return false; 63 /* LR (X30) */ 64 if (!copy_in_reg(&frame->pc, fp + 8)) 65 return false; 66 67 ftrace_map_lr(&frame->pc); 68 69 frame->pc -= 4; 70 71 return true; 72 } 73 74 void print_stack_arm64(struct unwind_state_arm64 *state, 75 vaddr_t stack, size_t stack_size) 76 { 77 trace_printf_helper_raw(TRACE_ERROR, true, "Call stack:"); 78 79 ftrace_map_lr(&state->pc); 80 do { 81 trace_printf_helper_raw(TRACE_ERROR, true, " 0x%016" PRIx64, 82 state->pc); 83 } while (unwind_stack_arm64(state, stack, stack_size)); 84 } 85