5aaf5f7b87
%fs needs to be copied from parent to child during fork. Tidied up some whitespace while I was here. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
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* Copyright 2003 PathScale, Inc.
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*
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* Licensed under the GPL
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*/
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#ifndef __UM_PROCESSOR_X86_64_H
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#define __UM_PROCESSOR_X86_64_H
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/* include faultinfo structure */
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#include "sysdep/faultinfo.h"
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struct arch_thread {
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unsigned long debugregs[8];
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int debugregs_seq;
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unsigned long fs;
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struct faultinfo faultinfo;
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};
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/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
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static inline void rep_nop(void)
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{
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__asm__ __volatile__("rep;nop": : :"memory");
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}
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#define cpu_relax() rep_nop()
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#define INIT_ARCH_THREAD { .debugregs = { [ 0 ... 7 ] = 0 }, \
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.debugregs_seq = 0, \
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.fs = 0, \
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.faultinfo = { 0, 0, 0 } }
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static inline void arch_flush_thread(struct arch_thread *thread)
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{
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}
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static inline void arch_copy_thread(struct arch_thread *from,
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struct arch_thread *to)
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{
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to->fs = from->fs;
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}
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#include "asm/arch/user.h"
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#define current_text_addr() \
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({ void *pc; __asm__("movq $1f,%0\n1:":"=g" (pc)); pc; })
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#define ARCH_IS_STACKGROW(address) \
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(address + 128 >= UPT_SP(¤t->thread.regs.regs))
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#define KSTK_EIP(tsk) KSTK_REG(tsk, RIP)
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#define KSTK_ESP(tsk) KSTK_REG(tsk, RSP)
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#include "asm/processor-generic.h"
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#endif
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