| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1999-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library. If not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | /* This file contains a bit of information about the stack allocation |
| 19 | of the processor. */ |
| 20 | |
| 21 | #ifndef _STACKINFO_H |
| 22 | #define _STACKINFO_H 1 |
| 23 | |
| 24 | #include <elf.h> |
| 25 | |
| 26 | /* On m68k the stack grows down. */ |
| 27 | #define _STACK_GROWS_DOWN 1 |
| 28 | |
| 29 | /* Default to an executable stack. PF_X can be overridden if PT_GNU_STACK |
| 30 | is present, but it is presumed absent. */ |
| 31 | #define DEFAULT_STACK_PERMS (PF_R|PF_W|PF_X) |
| 32 | |
| 33 | /* Access to the stack pointer. */ |
| 34 | #define stackinfo_get_sp() \ |
| 35 | ({ void *p__; asm volatile ("move.l %%sp, %0" : "=r" (p__)); p__; }) |
| 36 | #define stackinfo_sub_sp(ptr) \ |
| 37 | ({ ptrdiff_t d__; \ |
| 38 | asm volatile ("sub.l %%sp, %0" : "=r" (d__) : "0" (ptr)); \ |
| 39 | d__; }) |
| 40 | |
| 41 | #endif /* stackinfo.h */ |