55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* Default stack size. */
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#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
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/* Required stack pointer alignment at beginning. SSE requires 16
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bytes. */
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#define STACK_ALIGN 16
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/* Minimal stack size after allocating thread descriptor and guard size. */
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#define MINIMAL_REST_STACK 2048
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/* Alignment requirement for TCB. */
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#define TCB_ALIGNMENT 16
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/* Location of current stack frame. The frame pointer is not usable. */
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#define CURRENT_STACK_FRAME \
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({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; })
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/* We prefer to have the stack allocated in the low 4GB since this
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allows faster context switches. */
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#define ARCH_MAP_FLAGS MAP_32BIT
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/* If it is not possible to allocate memory there retry without that
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flag. */
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#define ARCH_RETRY_MMAP(size) \
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mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC, \
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
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/* XXX Until we have a better place keep the definitions here. */
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/* While there is no such syscall. */
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#define __exit_thread_inline(val) \
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asm volatile ("syscall" :: "a" (__NR_exit), "D" (val))
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