1 // SPDX-License-Identifier: BSD-2-Clause 2 /*- 3 * Copyright (c) 2015 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 <arm.h> 33 #include <kernel/thread.h> 34 #include <kernel/unwind.h> 35 #include <kernel/tee_misc.h> 36 #include <string.h> 37 #include <tee/tee_svc.h> 38 #include <trace.h> 39 40 static bool copy_in_reg(uint64_t *reg, vaddr_t addr, bool kernel_data) 41 { 42 if (!kernel_data) 43 return !tee_svc_copy_from_user(reg, (void *)addr, sizeof(*reg)); 44 45 memcpy(reg, (void *)addr, sizeof(*reg)); 46 return true; 47 } 48 49 bool unwind_stack_arm64(struct unwind_state_arm64 *frame, bool kernel_stack, 50 vaddr_t stack, size_t stack_size) 51 { 52 vaddr_t fp = frame->fp; 53 54 if (!core_is_buffer_inside(fp, sizeof(uint64_t) * 3, 55 stack, stack_size)) { 56 DMSG("FP out of bounds %#" PRIxVA, fp); 57 return false; 58 } 59 60 frame->sp = fp + 0x10; 61 /* FP to previous frame (X29) */ 62 if (!copy_in_reg(&frame->fp, fp, kernel_stack)) 63 return false; 64 /* LR (X30) */ 65 if (!copy_in_reg(&frame->pc, fp + 8, kernel_stack)) 66 return false; 67 frame->pc -= 4; 68 69 return true; 70 } 71 72 #if defined(CFG_UNWIND) && (TRACE_LEVEL > 0) 73 74 void print_stack_arm64(int level, struct unwind_state_arm64 *state, 75 bool kernel_stack, vaddr_t stack, size_t stack_size) 76 { 77 trace_printf_helper_raw(level, true, "Call stack:"); 78 do { 79 trace_printf_helper_raw(level, true, " 0x%016" PRIx64, 80 state->pc); 81 } while (unwind_stack_arm64(state, kernel_stack, stack, stack_size)); 82 } 83 84 void print_kernel_stack(int level) 85 { 86 struct unwind_state_arm64 state; 87 uaddr_t stack = thread_stack_start(); 88 size_t stack_size = thread_stack_size(); 89 90 memset(&state, 0, sizeof(state)); 91 state.pc = read_pc(); 92 state.fp = read_fp(); 93 94 print_stack_arm64(level, &state, 95 true /*kernel_stack*/, stack, stack_size); 96 } 97 98 #endif 99