Home Explore Help
Register Sign In
akucxy
/
gcc
1
0
Fork 0
Files Issues 0 Pull Requests 0 Wiki
Tree: 0b324a1ae7
Branches Tags
gcc
/
libgcc
/
config
/
aarch64
/
crtn.S

crtn.S 2.0 KB
History Raw

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061 
  1. # Machine description for AArch64 architecture.
    2. 

  2. # Copyright (C) 2009-2022 Free Software Foundation, Inc.
    3. 

  3. # Contributed by ARM Ltd.
    4. 

  4. #
    5. 

  5. # This file is free software; you can redistribute it and/or modify it
    6. 

  6. # under the terms of the GNU General Public License as published by the
    7. 

  7. # Free Software Foundation; either version 3, or (at your option) any
    8. 

  8. # later version.
    9. 

  9. #
    10. 

  10. # This file is distributed in the hope that it will be useful, but
    11. 

  11. # WITHOUT ANY WARRANTY; without even the implied warranty of
    12. 

  12. # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13. 

  13. # General Public License for more details.
    14. 

  14. #
    15. 

  15. # Under Section 7 of GPL version 3, you are granted additional
    16. 

  16. # permissions described in the GCC Runtime Library Exception, version
    17. 

  17. # 3.1, as published by the Free Software Foundation.
    18. 

  18. #
    19. 

  19. # You should have received a copy of the GNU General Public License and
    20. 

  20. # a copy of the GCC Runtime Library Exception along with this program;
    21. 

  21. # see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    22. 

  22. # <http://www.gnu.org/licenses/>.
    23. 

  23. 

  24. /* An executable stack is *not* required for these functions.  */
    25. 

  25. #if defined(__ELF__) && defined(__linux__)
    26. 

  26. .section .note.GNU-stack,"",%progbits
    27. 

  27. .previous
    28. 

  28. #endif
    29. 

  29. 

  30. # This file just makes sure that the .fini and .init sections do in
    31. 

  31. # fact return.  Users may put any desired instructions in those sections.
    32. 

  32. # This file is the last thing linked into any executable.
    33. 

  33. 

  34. 	# Note - this macro is complemented by the FUNC_START macro
    35. 

  35. 	# in crti.S.  If you change this macro you must also change
    36. 

  36. 	# that macro match.
    37. 

  37. 	#
    38. 

  38. 	# Note - we do not try any fancy optimizations of the return
    39. 

  39. 	# sequences here, it is just not worth it.  Instead keep things
    40. 

  40. 	# simple.  Restore all the save resgisters, including the link
    41. 

  41. 	# register and then perform the correct function return instruction.
    42. 

  42. .macro FUNC_END
    43. 

  43. 	ldp	x19, x20, [sp], #16
    44. 

  44. 	ldp	x21, x22, [sp], #16
    45. 

  45. 	ldp	x23, x24, [sp], #16
    46. 

  46. 	ldp	x25, x26, [sp], #16
    47. 

  47. 	ldp	x27, x28, [sp], #16
    48. 

  48. 	ldp	x29, x30, [sp], #16
    49. 

  49. 	ret
    50. 

  50. .endm
    51. 

  51. 

  52. 

  53. 	.section	".init"
    54. 

  54. 	;;
    55. 

  55. 	FUNC_END
    56. 

  56. 

  57. 	.section	".fini"
    58. 

  58. 	;;
    59. 

  59. 	FUNC_END
    60. 

  60. 

  61. # end of crtn.S
    62.