1 //===-- hwasan_registers.h --------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This describes the register state retrieved by hwasan when error reporting. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef HWASAN_REGISTERS_H 14 #define HWASAN_REGISTERS_H 15 16 #include "sanitizer_common/sanitizer_common.h" 17 #include "sanitizer_common/sanitizer_platform.h" 18 19 #if defined(__aarch64__) 20 21 # define CAN_GET_REGISTERS 1 22 23 struct Registers { 24 uptr x[32]; 25 }; 26 27 __attribute__((always_inline, unused)) static Registers GetRegisters() { 28 Registers regs; 29 __asm__ volatile( 30 "stp x0, x1, [%1, #(8 * 0)]\n" 31 "stp x2, x3, [%1, #(8 * 2)]\n" 32 "stp x4, x5, [%1, #(8 * 4)]\n" 33 "stp x6, x7, [%1, #(8 * 6)]\n" 34 "stp x8, x9, [%1, #(8 * 8)]\n" 35 "stp x10, x11, [%1, #(8 * 10)]\n" 36 "stp x12, x13, [%1, #(8 * 12)]\n" 37 "stp x14, x15, [%1, #(8 * 14)]\n" 38 "stp x16, x17, [%1, #(8 * 16)]\n" 39 "stp x18, x19, [%1, #(8 * 18)]\n" 40 "stp x20, x21, [%1, #(8 * 20)]\n" 41 "stp x22, x23, [%1, #(8 * 22)]\n" 42 "stp x24, x25, [%1, #(8 * 24)]\n" 43 "stp x26, x27, [%1, #(8 * 26)]\n" 44 "stp x28, x29, [%1, #(8 * 28)]\n" 45 : "=m"(regs) 46 : "r"(regs.x)); 47 regs.x[30] = reinterpret_cast<uintptr_t>(__builtin_return_address(0)); 48 regs.x[31] = reinterpret_cast<uintptr_t>(__builtin_frame_address(0)); 49 return regs; 50 } 51 52 #else 53 # define CAN_GET_REGISTERS 0 54 #endif 55 56 #endif // HWASAN_REGISTERS_H 57