1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 #if defined(__arm__) 32 33 #define GOT_RELOC(sym) .long sym(GOT_PREL) 34 #define CALL(sym) bl sym 35 #define DATA_WORD(val) .long val 36 #define MAIN .globl main; main: mov r0, #0; bx lr 37 38 #elif defined(__aarch64__) 39 40 #define GOT_RELOC(sym) adrp x1, :got:sym 41 #define CALL(sym) bl sym 42 #define DATA_WORD(val) .quad val 43 #define MAIN .globl main; main: mov w0, wzr; ret 44 45 #elif defined(__riscv) 46 47 // No `lga` in clang unless https://reviews.llvm.org/D107278 lands. 48 // `la` is equivalent when using PIC (which we do) though. 49 #define GOT_RELOC(sym) la a0, sym 50 #define CALL(sym) call sym@plt 51 #define DATA_WORD(val) .quad val 52 #define MAIN .globl main; main: li a0, 0; ret 53 54 #elif defined(__i386__) 55 56 #define GOT_RELOC(sym) .long sym@got 57 #define CALL(sym) call sym@PLT 58 #define DATA_WORD(val) .long val 59 #define MAIN .globl main; main: xorl %eax, %eax; retl 60 61 #elif defined(__x86_64__) 62 63 #define GOT_RELOC(sym) .quad sym@got 64 #define CALL(sym) call sym@PLT 65 #define DATA_WORD(val) .quad val 66 #define MAIN .globl main; main: xorl %eax, %eax; retq 67 68 #else 69 #error "Unrecognized architecture" 70 #endif 71