mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 05:50:14 +00:00
51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/* Copyright (C) 2002-2024 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/>. */
|
|
|
|
/* Default stack size. */
|
|
#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
|
|
|
|
/* Minimum guard size. */
|
|
#define ARCH_MIN_GUARD_SIZE 0
|
|
|
|
/* Required stack pointer alignment at beginning. SSE requires 16
|
|
bytes. */
|
|
#define STACK_ALIGN 16
|
|
|
|
/* Minimal stack size after allocating thread descriptor and guard size. */
|
|
#define MINIMAL_REST_STACK 2048
|
|
|
|
/* Alignment requirement for TCB.
|
|
|
|
Some processors such as Intel Atom pay a big penalty on every
|
|
access using a segment override if that segment's base is not
|
|
aligned to the size of a cache line. (See Intel 64 and IA-32
|
|
Architectures Optimization Reference Manual, section 13.3.3.3,
|
|
"Segment Base".) On such machines, a cache line is 64 bytes. */
|
|
#define TCB_ALIGNMENT 64
|
|
|
|
|
|
/* Location of current stack frame. */
|
|
#ifdef __x86_64__
|
|
/* The frame pointer is not usable. */
|
|
# define CURRENT_STACK_FRAME \
|
|
({ register void * p__ __asm__(RSP_REG); \
|
|
asm volatile("" : "=r" (p__)); \
|
|
p__; })
|
|
#else
|
|
# define CURRENT_STACK_FRAME __builtin_frame_address (0)
|
|
#endif
|