/
githubmirror
/
glibc
Обзор
Документация
Войти
/
githubmirror
/
glibc
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
sysdeps/i386/stackinfo.h
43 строки
2 KB
Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
Код
Авторство
О чём код?
/* Copyright (C) 1999-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ /* This file contains a bit of information about the stack allocation of the processor. */ #ifndef _STACKINFO_H #define _STACKINFO_H 1 #include <elf.h> /* On x86 the stack grows down. */ #define _STACK_GROWS_DOWN 1 /* Default to an executable stack. PROT_EXEC can be overridden if PT_GNU_STACK * is present, but it is presumed absent. */ #define DEFAULT_STACK_PROT_PERMS (PROT_READ|PROT_WRITE|PROT_EXEC) /* Access to the stack pointer. The macros are used in alloca_account for which they need to act as barriers as well, hence the additional (unnecessary) parameters. */ #define stackinfo_get_sp() \ ({ void *p__; asm volatile ("mov %%esp, %0" : "=r" (p__)); p__; }) #define stackinfo_sub_sp(ptr) \ ({ ptrdiff_t d__; \ asm volatile ("sub %%esp, %0" : "=r" (d__) : "0" (ptr)); \ d__; }) #endif /* stackinfo.h */