text: /*
   * Copyright (C) 2011-2020 Intel Corporation. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *   * Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in
   *     the documentation and/or other materials provided with the
   *     distribution.
   *   * Neither the name of Intel Corporation nor the names of its
   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #ifndef _THREAD_DATA_H_
  #define _THREAD_DATA_H_
  
  #include "se_types.h"
  #include "se_cdefs.h"
  
  #ifdef TD_SUPPORT_MULTI_PLATFORM
  /* To enable the SignTool to sign both 32/64-bit Enclave for ELF,
   * we need to make the struct `thread_data_t' have a consistent
   * definition for 32/64-bit compiler.
   *
   * We achieve it by forcing the compiler to check pre-defined macros
   *   `RTS_SYSTEM_WORDSIZE'
   *
   * |--------------------------+-------|
   * | RTS_SYSTEM_WORDSIZE = 32 | ELF32 |
   * |--------------------------+-------|
   * | RTS_SYSTEM_WORDSIZE = 64 | ELF64 |
   *
   */
  #  ifndef RTS_SYSTEM_WORDSIZE
  #    error RTS_SYSTEM_WORDSIZE should be pre-defined.
  #  endif
  
  /* Avoid to use `uintptr_t' in the struct `thread_data_t' and its members. */
  #  if RTS_SYSTEM_WORDSIZE == 32
  typedef uint32_t sys_word_t;
  #  elif RTS_SYSTEM_WORDSIZE == 64
  typedef uint64_t sys_word_t;
  #  else
  #    error Invalid value for 'RTS_SYSTEM_WORDSIZE'.
  #  endif
  
  #else
  
  /* For uRTS, there is no need to define the macro 'TD_SUPPORT_MULTI_PLATFORM' */
  typedef size_t sys_word_t;
  
  /* SE_32 and SE_64 are defined in "se_cdefs.h" */
  #  ifdef SE_32
  #    define RTS_SYSTEM_WORDSIZE 32
  #  elif defined(SE_64)
  #    define RTS_SYSTEM_WORDSIZE 64
  #  else
  #    error Unknown system word size.
  #  endif
  
  #endif /* ! TD_SUPPORT_MULTI_PLATFORM */
  
  /* The data structure currently is naturally aligned regardless of the value of
   * RTS_SYSTEM_WORDSIZE.
   *
   * However, we need to take care when modifying the data structure in future.
   */
  #define SGX_UTILITY_THREAD  0x1
  
  typedef struct _thread_data_t
  {
      sys_word_t  self_addr;
      sys_word_t  last_sp;            /* set by urts, relative to TCS */
      sys_word_t  stack_base_addr;    /* set by urts, relative to TCS */
      sys_word_t  stack_limit_addr;   /* set by urts, relative to TCS */
      sys_word_t  first_ssa_gpr;      /* set by urts, relative to TCS */
      sys_word_t  stack_guard;        /* GCC expects start_guard at 0x14 on x86 and 0x28 on x64 */
  
      sys_word_t  flags;
      sys_word_t  xsave_size;         /* in bytes (se_ptrace.c needs to know its offset).*/
      sys_word_t  last_error;         /* init to be 0. Used by trts. */
  
  #ifdef TD_SUPPORT_MULTI_PLATFORM
      sys_word_t  m_next;             /* next TD used by trusted thread library (of type "struct _thread_data *") */
  #else
      struct _thread_data_t *m_next;
  #endif
      sys_word_t  tls_addr;           /* points to TLS pages */
      sys_word_t  tls_array;          /* points to TD.tls_addr relative to TCS */
  #ifdef TD_SUPPORT_MULTI_PLATFORM
      sys_word_t  exception_flag;     /* mark how many exceptions are being handled */
  #else
      intptr_t    exception_flag;
  #endif
      sys_word_t  cxx_thread_info[6];
      sys_word_t  stack_commit_addr;
  } thread_data_t;
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  thread_data_t *get_thread_data(void);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  