crt0.S 1.6 KB

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  1. /* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Library General Public License as
  5. published by the Free Software Foundation; either version 2 of the
  6. License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Library General Public License for more details.
  11. You should have received a copy of the GNU Library General Public
  12. License along with the GNU C Library; see the file COPYING.LIB. If
  13. not, see <http://www.gnu.org/licenses/>. */
  14. #include <features.h>
  15. .global _start
  16. .global __exit
  17. .global atexit
  18. .global main
  19. #ifdef __H8300S__
  20. .h8300s
  21. #else
  22. .h8300h
  23. #endif
  24. .text
  25. _start: /* put here so that references to _start work with elf-PIC */
  26. mov.l @(0,sp),er0 /* argc */
  27. mov.l @(4,sp),er1 /* argv */
  28. mov.l @(8,sp),er2 /* envp */
  29. #if !defined(__PIC__)
  30. jsr @___uClibc_main
  31. #else
  32. mov.l @(___uClibc_main@GOTOFF,er5),er3
  33. jsr @er3
  34. #endif
  35. /* If that didn't kill us, ... */
  36. __exit:
  37. mov.l er0,er1
  38. sub.l er0,er0
  39. inc.l #1,er0 /* __NR_exit */
  40. trapa #0
  41. /*
  42. * this was needed for gcc/g++-builds, atexit was not getting included
  43. * for some stupid reason, this gets us a compiler
  44. */
  45. empty_func:
  46. rts
  47. .weak atexit
  48. atexit = empty_func
  49. /* Define a symbol for the first piece of initialized data. */
  50. .data
  51. .globl __data_start
  52. __data_start:
  53. .long 0
  54. .weak data_start
  55. data_start = __data_start