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riscv64
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getcontext.S

getcontext.S 2.0 KB
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  1. /* Save current context.
    2. 

  2.    Copyright (C) 2009-2018 Free Software Foundation, Inc.
    3. 

  3. 

  4.    The GNU C Library is free software; you can redistribute it and/or
    5. 

  5.    modify it under the terms of the GNU Lesser General Public
    6. 

  6.    License as published by the Free Software Foundation; either
    7. 

  7.    version 2.1 of the License, or (at your option) any later version.
    8. 

  8. 

  9.    The GNU C Library is distributed in the hope that it will be useful,
    10. 

  10.    but WITHOUT ANY WARRANTY; without even the implied warranty of
    11. 

  11.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12. 

  12.    Lesser General Public License for more details.
    13. 

  13. 

  14.    You should have received a copy of the GNU Lesser General Public
    15. 

  15.    License along with the GNU C Library.  If not, see
    16. 

  16.    <http://www.gnu.org/licenses/>.  */
    17. 

  17. 

  18. #include "ucontext-macros.h"
    19. 

  19. 

  20. /* int getcontext (ucontext_t *ucp) */
    21. 

  21. 

  22. 	.text
    23. 

  23. LEAF (getcontext)
    24. 

  24. 	SAVE_INT_REG (ra,   0, a0)
    25. 

  25. 	SAVE_INT_REG (ra,   1, a0)
    26. 

  26. 	SAVE_INT_REG (sp,   2, a0)
    27. 

  27. 	SAVE_INT_REG (s0,   8, a0)
    28. 

  28. 	SAVE_INT_REG (s1,   9, a0)
    29. 

  29. 	SAVE_INT_REG (x0,  10, a0)	/* return 0 by overwriting a0.  */
    30. 

  30. 	SAVE_INT_REG (s2,  18, a0)
    31. 

  31. 	SAVE_INT_REG (s3,  19, a0)
    32. 

  32. 	SAVE_INT_REG (s4,  20, a0)
    33. 

  33. 	SAVE_INT_REG (s5,  21, a0)
    34. 

  34. 	SAVE_INT_REG (s6,  22, a0)
    35. 

  35. 	SAVE_INT_REG (s7,  23, a0)
    36. 

  36. 	SAVE_INT_REG (s8,  24, a0)
    37. 

  37. 	SAVE_INT_REG (s9,  25, a0)
    38. 

  38. 	SAVE_INT_REG (s10, 26, a0)
    39. 

  39. 	SAVE_INT_REG (s11, 27, a0)
    40. 

  40. 

  41. #ifndef __riscv_float_abi_soft
    42. 

  42. 	frsr	a1
    43. 

  43. 

  44. 	SAVE_FP_REG (fs0,   8, a0)
    45. 

  45. 	SAVE_FP_REG (fs1,   9, a0)
    46. 

  46. 	SAVE_FP_REG (fs2,  18, a0)
    47. 

  47. 	SAVE_FP_REG (fs3,  19, a0)
    48. 

  48. 	SAVE_FP_REG (fs4,  20, a0)
    49. 

  49. 	SAVE_FP_REG (fs5,  21, a0)
    50. 

  50. 	SAVE_FP_REG (fs6,  22, a0)
    51. 

  51. 	SAVE_FP_REG (fs7,  23, a0)
    52. 

  52. 	SAVE_FP_REG (fs8,  24, a0)
    53. 

  53. 	SAVE_FP_REG (fs9,  25, a0)
    54. 

  54. 	SAVE_FP_REG (fs10, 26, a0)
    55. 

  55. 	SAVE_FP_REG (fs11, 27, a0)
    56. 

  56. 

  57. 	sw	a1, MCONTEXT_FSR(a0)
    58. 

  58. #endif /* __riscv_float_abi_soft */
    59. 

  59. 

  60. /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
    61. 

  61. 	li	a3, _NSIG8
    62. 

  62. 	add     a2, a0, UCONTEXT_SIGMASK
    63. 

  63. 	mv	a1, zero
    64. 

  64. 	li	a0, SIG_BLOCK
    65. 

  65. 

  66. 	li	a7, SYS_ify (rt_sigprocmask)
    67. 

  67. 	scall
    68. 

  68. 	bltz	a0, 99f
    69. 

  69. 

  70. 	ret
    71. 

  71. 

  72. 99:	j	__syscall_error
    73. 

  73. 

  74. PSEUDO_END (getcontext)
    75.