projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| bfff8b1b | 1 | /* Copyright (C) 2011-2017 Free Software Foundation, Inc. |
| 63d143a2 CM |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
| 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 | |
| ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 63d143a2 CM |
18 | |
| 19 | /* This file contains a bit of information about the stack allocation | |
| 20 | of the processor. */ | |
| 21 | ||
| 22 | #ifndef _STACKINFO_H | |
| 23 | #define _STACKINFO_H 1 | |
| 24 | ||
| 25 | #include <elf.h> | |
| 26 | ||
| 27 | /* On tile the stack grows down. */ | |
| 28 | #define _STACK_GROWS_DOWN 1 | |
| 29 | ||
| 30 | /* Default to a non-executable stack. */ | |
| 31 | #define DEFAULT_STACK_PERMS (PF_R|PF_W) | |
| 32 | ||
| 33 | /* Access to the stack pointer. The macros are used in alloca_account | |
| 34 | for which they need to act as barriers as well, hence the additional | |
| 35 | (unnecessary) parameters. */ | |
| 36 | #define stackinfo_get_sp() \ | |
| 37 | ({ void *p__; asm volatile ("move %0, sp" : "=r" (p__)); p__; }) | |
| 38 | #if defined __tilegx__ && __WORDSIZE == 32 | |
| 39 | #define __stackinfo_sub "subx" | |
| 40 | #else | |
| 41 | #define __stackinfo_sub "sub" | |
| 42 | #endif | |
| 43 | #define stackinfo_sub_sp(ptr) \ | |
| 44 | ({ ptrdiff_t d__; \ | |
| 45 | asm volatile (__stackinfo_sub " %0, %0, sp" : "=r" (d__) : "0" (ptr)); \ | |
| 46 | d__; }) | |
| 47 | ||
| 48 | #endif /* stackinfo.h */ |