lowlib.S 2.3 KB

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  1. /*
  2. * Copyright (C) 2011-2016 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 "linux/linux-regs.h"
  32. .file "lowlib.S"
  33. .text
  34. DECLARE_LOCAL_FUNC get_bp
  35. mov %xbp, %xax
  36. ret
  37. #define reg_xax (0 * SE_WORDSIZE)
  38. #define reg_xbx (1 * SE_WORDSIZE)
  39. #define reg_xcx (2 * SE_WORDSIZE)
  40. #define reg_xdx (3 * SE_WORDSIZE)
  41. #define reg_xsi (4 * SE_WORDSIZE)
  42. #define reg_xdi (5 * SE_WORDSIZE)
  43. #define reg_xbp (6 * SE_WORDSIZE)
  44. #define reg_xsp (7 * SE_WORDSIZE)
  45. #define reg_xip (8 * SE_WORDSIZE)
  46. DECLARE_LOCAL_FUNC load_regs
  47. mov naked_arg0, %xdx
  48. mov reg_xax(%xdx), %xax
  49. mov reg_xbx(%xdx), %xbx
  50. mov reg_xcx(%xdx), %xcx
  51. mov reg_xsi(%xdx), %xsi
  52. mov reg_xdi(%xdx), %xdi
  53. mov reg_xbp(%xdx), %xbp
  54. mov reg_xsp(%xdx), %xsp
  55. mov reg_xax(%xdx), %xax
  56. push reg_xip(%xdx)
  57. mov reg_xdx(%xdx), %xdx
  58. ret