projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 88f4b692 | 1 | /* Pointer obfuscation implenentation. s390x version. |
| 6d7e8eda | 2 | Copyright (C) 2005-2023 Free Software Foundation, Inc. |
| 88f4b692 FW |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library; if not, see | |
| 17 | <https://www.gnu.org/licenses/>. */ | |
| 18 | ||
| 19 | #ifndef POINTER_GUARD_H | |
| 20 | #define POINTER_GUARD_H | |
| 21 | ||
| 22 | #if IS_IN (rtld) | |
| 23 | /* We cannot use the thread descriptor because in ld.so we use setjmp | |
| 24 | earlier than the descriptor is initialized. */ | |
| 25 | # include <sysdeps/generic/pointer_guard.h> | |
| 26 | #else | |
| 27 | /* For the time being just use stack_guard rather than a separate | |
| 28 | pointer_guard. */ | |
| 29 | # ifdef __ASSEMBLER__ | |
| 30 | # define PTR_MANGLE(reg, tmpreg) \ | |
| 31 | ear tmpreg,%a0; \ | |
| 32 | sllg tmpreg,tmpreg,32; \ | |
| 33 | ear tmpreg,%a1; \ | |
| 34 | xg reg,STACK_GUARD(tmpreg) | |
| 35 | # define PTR_MANGLE2(reg, tmpreg) \ | |
| 36 | xg reg,STACK_GUARD(tmpreg) | |
| 37 | # define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg) | |
| 38 | # else | |
| 39 | # include <stdint.h> | |
| 40 | # include <tls.h> | |
| 41 | # define PTR_MANGLE(var) \ | |
| 42 | (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ()) | |
| 43 | # define PTR_DEMANGLE(var) PTR_MANGLE (var) | |
| 44 | # endif | |
| 45 | #endif | |
| 46 | ||
| 47 | #endif /* POINTER_GUARD_H */ |