mirror of
https://github.com/intel/linux-sgx
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Li, Xun
101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/*
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* Copyright (C) 2011-2018 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef GNU_TLS_H__
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#define GNU_TLS_H__
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#include <stddef.h>
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/* Type for the dtv. */
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typedef union
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{
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size_t counter;
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struct
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{
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void *val;
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int is_static;
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} pointer;
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} dtv_t;
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typedef struct
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{
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void *tcb; /* Pointer to the TCB. Not necessarily the
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thread descriptor used by libpthread. */
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dtv_t *dtv;
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void *self; /* Pointer to the thread descriptor. */
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/* We are not interested in the other fields. */
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} tcbhead_t;
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/* ------------------------------------------------------------ */
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#if defined(__amd64) || defined(__amd64__) || defined (__x86_64)
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/* x86_64 uses %fs as the thread register */
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#define GET_DTV() \
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({ dtv_t* __dtv; \
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__asm__ ("mov %%fs:%c1, %0" : "=r"(__dtv) \
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: "i" (offsetof (tcbhead_t, dtv))); \
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__dtv; })
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#define GET_FS_GS_0() \
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({ uintptr_t __orig; \
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__asm__ volatile ("mov %%fs:0x0, %0" : "=r"(__orig)); \
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__orig; })
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#define SET_FS_GS_0(val) \
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({ __asm__ volatile ("mov %0, %%fs:0x0" : :"r"(val));})
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#elif defined(__i386) || defined(__i386__)
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/* IA32 uses %gs as the thread register */
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#define GET_DTV() \
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({ dtv_t* __dtv; \
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__asm__ ("mov %%gs:%c1, %0" : "=r"(__dtv) \
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: "i" (offsetof (tcbhead_t, dtv))); \
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__dtv; })
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#define GET_FS_GS_0() \
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({ uintptr_t __orig; \
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__asm__ volatile ("mov %%gs:0x0, %0" : "=r"(__orig)); \
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__orig; })
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#define SET_FS_GS_0(val) \
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({ __asm__ volatile ("mov %0, %%gs:0x0" : :"r"(val));})
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#endif
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#define read_dtv_val(dtv) (dtv->pointer.val)
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#define set_dtv_val(dtv, v) \
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do { dtv->pointer.val = (void*)(size_t)v; } while (0)
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#endif /* !GNU_TLS_H__ */
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