1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2023 Huawei Device Co., Ltd. 4 */ 5 6 #ifndef __POINTER_AUTH_COMMON_H__ 7 #define __POINTER_AUTH_COMMON_H__ 8 9 #define is_addr_error(addr) (((addr) >> 48) ^ 0xffff) 10 11 #define pauth_sign(type, key, addr, mod) \ 12 pauth_common(pac, type, key, addr, mod) 13 14 #define pauth_validate(type, key, addr, mod) \ 15 pauth_common(aut, type, key, addr, mod) 16 17 #define pauth_strip(type, addr) \ 18 ({ \ 19 const void *__addr = (addr); \ 20 \ 21 asm ("xpac" #type " %0\n" : "+r" (__addr)); \ 22 (typeof (addr))__addr; \ 23 }) 24 25 #define pauth_hash(addr, mod) ((unsigned int) (pauth_pacga(addr, mod) >> 32)) 26 27 #define pauth_common(prefix, type, key, addr, mod) \ 28 ({ \ 29 const void *__addr = (addr); \ 30 unsigned long __mod = (unsigned long)(mod); \ 31 \ 32 if (__builtin_constant_p(mod) && (__mod == 0)) \ 33 asm (#prefix #type "z" #key " %0\n" : "+r" (__addr)); \ 34 else \ 35 asm (#prefix #type #key " %0, %1\n" : "+r" (__addr) : \ 36 "r" (__mod)); \ 37 (typeof (addr))(__addr); \ 38 }) 39 40 #define pauth_get_raw_data(addr) \ 41 ({ \ 42 const void *__addr; \ 43 asm ("mov %0, %1\n" : "=&r" (__addr) : \ 44 "r" (addr)); \ 45 (void *)(__addr); \ 46 }) 47 48 #define pauth_sign_function(fun, mod, key) \ 49 ({ \ 50 const void *__fun = (fun); \ 51 unsigned long __mod = (unsigned long)(mod); \ 52 asm ("paci" #key " %0, %1\n" : "+r" (__fun) : \ 53 "r" (__mod)); \ 54 (void *)(__fun); \ 55 }) 56 57 #define pauth_pacda(addr, mod) pauth_common(pac, d, a, addr, mod) 58 59 #define pauth_pacdb(addr, mod) pauth_common(pac, d, b, addr, mod) 60 61 #define pauth_pacia(addr, mod) pauth_common(pac, i, a, addr, mod) 62 63 #define pauth_pacib(addr, mod) pauth_common(pac, i, b, addr, mod) 64 65 #define pauth_pacga(addr, mod) \ 66 ({ \ 67 const void *__addr = (addr); \ 68 unsigned long __mod = (unsigned long)(mod); \ 69 unsigned long __pac; \ 70 \ 71 asm ("pacga %0, %1, %2\n" : "=r" (__pac) : "r" (__addr), \ 72 "r" (__mod)); \ 73 __pac; \ 74 }) 75 76 #define pauth_autda(addr, mod) pauth_common(aut, d, a, addr, mod) 77 78 #define pauth_autdb(addr, mod) pauth_common(aut, d, b, addr, mod) 79 80 #define pauth_autia(addr, mod) pauth_common(aut, i, a, addr, mod) 81 82 #define pauth_autib(addr, mod) pauth_common(aut, i, b, addr, mod) 83 84 #define pauth_xpacd(addr) pauth_strip(d, addr) 85 86 #define pauth_xpaci(addr) pauth_strip(i, addr) 87 88 #endif /* __POINTER_AUTH_COMMON_H__ */ 89