mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 14:30:06 +00:00
49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
|
|
|
|
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
|
|
<http://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 tile the stack grows down. */
|
|
#define _STACK_GROWS_DOWN 1
|
|
|
|
/* Default to a non-executable stack. */
|
|
#define DEFAULT_STACK_PERMS (PF_R|PF_W)
|
|
|
|
/* 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 ("move %0, sp" : "=r" (p__)); p__; })
|
|
#if defined __tilegx__ && __WORDSIZE == 32
|
|
#define __stackinfo_sub "subx"
|
|
#else
|
|
#define __stackinfo_sub "sub"
|
|
#endif
|
|
#define stackinfo_sub_sp(ptr) \
|
|
({ ptrdiff_t d__; \
|
|
asm volatile (__stackinfo_sub " %0, %0, sp" : "=r" (d__) : "0" (ptr)); \
|
|
d__; })
|
|
|
|
#endif /* stackinfo.h */
|