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https://github.com/edk2-porting/linux-next.git
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f355559cf7
x86_64 needs some TLS fixes. What was missing was remembering the child thread id during clone and stuffing it into the child during each context switch. The %fs value is stored separately in the thread structure since the host controls what effect it has on the actual register file. The host also needs to store it in its own thread struct, so we need the value kept outside the register file. arch_prctl_skas was fixed to call PTRACE_ARCH_PRCTL appropriately. There is some saving and restoring of registers in the ARCH_SET_* cases so that the correct set of registers are changed on the host and restored to the process when it runs again. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> 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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extern 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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}
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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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