set_tls.c 2.3 KB

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  1. /*
  2. * Copyright (C) 2011-2017 Intel Corporation. All rights reserved.
  3. *
  4. * Redistribution and use in source and binary forms, with or without
  5. * modification, are permitted provided that the following conditions
  6. * are met:
  7. *
  8. * * Redistributions of source code must retain the above copyright
  9. * notice, this list of conditions and the following disclaimer.
  10. * * Redistributions in binary form must reproduce the above copyright
  11. * notice, this list of conditions and the following disclaimer in
  12. * the documentation and/or other materials provided with the
  13. * distribution.
  14. * * Neither the name of Intel Corporation nor the names of its
  15. * contributors may be used to endorse or promote products derived
  16. * from this software without specific prior written permission.
  17. *
  18. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29. *
  30. */
  31. /**
  32. * set_tls.c
  33. * Implemente the TLS support in simulation mode
  34. */
  35. #include "td_mngr.h"
  36. #include "util.h"
  37. int td_mngr_set_td(void *enclave_base, tcs_t *tcs)
  38. {
  39. dtv_t* dtv;
  40. tcs_sim_t *tcs_sim;
  41. if (!tcs)
  42. return 0;
  43. /* save the old DTV[0].pointer->val */
  44. dtv = GET_DTV();
  45. tcs_sim = (tcs_sim_t *)tcs->reserved;
  46. tcs_sim->saved_dtv = (uintptr_t)read_dtv_val(dtv);
  47. /* save the old fs:0x0 or gs:0x0 value */
  48. tcs_sim->saved_fs_gs_0 = GET_FS_GS_0();
  49. /* set the DTV[0].pointer->val to TLS address */
  50. uintptr_t *tib = GET_PTR(uintptr_t, enclave_base, tcs->ofs_base);
  51. set_dtv_val(dtv, tib);
  52. /* set the fs:0x0 or gs:0x0 to TLS address */
  53. SET_FS_GS_0(tib);
  54. return 1;
  55. }
  56. /* vim: set ts=4 sw=4 cin et: */