crt0.S 1.7 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, write to the Free Software Foundation, Inc., 675 Mass Ave,
  14. Cambridge, MA 02139, USA. */
  15. /*
  16. * NOTE: this file works for PIC and non-PIC code. Be very careful how
  17. * you modify it !
  18. */
  19. .global _start
  20. .global __exit
  21. .global atexit
  22. .text
  23. nop
  24. nop
  25. _start: /* put here so that references to _start work with elf-PIC */
  26. movea.l %d5, %a5 /* uClinux passes in data segment here */
  27. /*
  28. * argc, argv and envp are on the stack, just call to main
  29. */
  30. lea __uClibc_main-.-8, %a0 /* call uClibc main */
  31. jsr %pc@(%a0)
  32. /* If that didn't kill us, ... */
  33. __exit:
  34. move.l %sp@+,%d1
  35. moveq #1,%d0 /* __NR_exit */
  36. trap #0
  37. /*
  38. * this was needed for gcc/g++-builds, atexit was not getting included
  39. * for some stupid reason, this gets us a compiler
  40. */
  41. empty_func:
  42. rts
  43. .weak atexit
  44. atexit = empty_func
  45. /*
  46. * a little bit of stuff to support C++
  47. */
  48. .section .ctors,"aw"
  49. .align 4
  50. .global __CTOR_LIST__
  51. __CTOR_LIST__:
  52. .long -1
  53. .section .dtors,"aw"
  54. .align 4
  55. .global __DTOR_LIST__
  56. __DTOR_LIST__:
  57. .long -1