trts_trim.cpp 2.8 KB

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  1. /*
  2. * Copyright (C) 2011-2018 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. #include "trts_trim.h"
  32. #include "sgx_trts.h" // for sgx_ocalloc, sgx_is_outside_enclave
  33. #include "internal/rts.h"
  34. /* sgx_ocfree() just restores the original outside stack pointer. */
  35. #define OCALLOC(val, type, len) do { \
  36. void* __tmp = sgx_ocalloc(len); \
  37. if (__tmp == NULL) { \
  38. sgx_ocfree(); \
  39. return SGX_ERROR_UNEXPECTED;\
  40. } \
  41. (val) = (type)__tmp; \
  42. } while (0)
  43. typedef struct ms_trim_range_ocall_t {
  44. size_t ms_fromaddr;
  45. size_t ms_toaddr;
  46. } ms_trim_range_ocall_t;
  47. typedef struct ms_trim_range_commit_ocall_t {
  48. size_t ms_addr;
  49. } ms_trim_range_commit_ocall_t;
  50. sgx_status_t SGXAPI trim_range_ocall(size_t fromaddr, size_t toaddr)
  51. {
  52. sgx_status_t status = SGX_SUCCESS;
  53. ms_trim_range_ocall_t* ms;
  54. OCALLOC(ms, ms_trim_range_ocall_t*, sizeof(*ms));
  55. ms->ms_fromaddr = fromaddr;
  56. ms->ms_toaddr = toaddr;
  57. status = sgx_ocall(EDMM_TRIM, ms);
  58. sgx_ocfree();
  59. return status;
  60. }
  61. sgx_status_t SGXAPI trim_range_commit_ocall(size_t addr)
  62. {
  63. sgx_status_t status = SGX_SUCCESS;
  64. ms_trim_range_commit_ocall_t* ms;
  65. OCALLOC(ms, ms_trim_range_commit_ocall_t*, sizeof(*ms));
  66. ms->ms_addr = addr;
  67. status = sgx_ocall(EDMM_TRIM_COMMIT, ms);
  68. sgx_ocfree();
  69. return status;
  70. }