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sysdeps
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linux
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vfork.S

vfork.S 884 B
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  1. /*
    2. 

  2.  * June 27, 2001             Manuel Novoa III
    3. 

  3.  *
    4. 

  4.  * Modified to (hopefully) be PIC and REENTRANT safe.
    5. 

  5.  *
    6. 

  6.  */
    7. 

  7. 	
    8. 

  8. .text
    9. 

  9. 	.align 4
    10. 

  10. .globl vfork
    11. 

  11. 	.type	 vfork,@function
    12. 

  12. vfork:
    13. 

  13. 	popl %ecx
    14. 

  14. 	movl $190,%eax
    15. 

  15. #ifdef PIC
    16. 

  16. 	pushl %ebx
    17. 

  17. #endif
    18. 

  18. #APP
    19. 

  19. 	int $0x80
    20. 

  20. #NO_APP
    21. 

  21. #ifdef PIC
    22. 

  22. 	popl %ebx
    23. 

  23. #endif
    24. 

  24. 	cmpl $-4095,%eax
    25. 

  25. 	jae .Lerror
    26. 

  26. 	jmp *%ecx
    27. 

  27. 	.p2align 4,,7
    28. 

  28. .Lerror:
    29. 

  29. 	pushl %ecx
    30. 

  30. 

  31. #ifdef PIC
    32. 

  32. 	pushl %ebx
    33. 

  33. 	call .Lhere
    34. 

  34. .Lhere:
    35. 

  35. 	popl %ebx
    36. 

  36. 	addl $_GLOBAL_OFFSET_TABLE_+[.-.Lhere],%ebx
    37. 

  37. 	negl %eax
    38. 

  38. 	movl %eax,%ecx
    39. 

  39. #ifdef __UCLIBC_HAS_THREADS__
    40. 

  40. 	call __errno_location@PLT
    41. 

  41. #else
    42. 

  42. 	movl errno@GOT(%ebx),%eax
    43. 

  43. #endif /* __UCLIBC_HAS_THREADS__ */
    44. 

  44. 	movl %ecx,(%eax)
    45. 

  45. 	popl %ebx
    46. 

  46. #else
    47. 

  47. 	negl %eax
    48. 

  48. #ifdef __UCLIBC_HAS_THREADS__
    49. 

  49. 	movl %eax,%ecx
    50. 

  50. 	call __errno_location
    51. 

  51. 	movl %ecx,(%eax)
    52. 

  52. #else
    53. 

  53. 	movl %eax,errno
    54. 

  54. #endif /* __UCLIBC_HAS_THREADS__ */
    55. 

  55. 

  56. #endif /* PIC */
    57. 

  57. 	
    58. 

  58. 	movl $-1,%eax
    59. 

  59. 	ret
    60. 

  60. .Lsize:
    61. 

  61. 	.size	 vfork,.Lsize-vfork
    62.