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syscall.S

syscall.S 1.1 KB
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  1. /*
    2. 

  2.  * Copyright (C) 2004-2007 Atmel Corporation
    3. 

  3.  *
    4. 

  4.  * This file is subject to the terms and conditions of the GNU Lesser General
    5. 

  5.  * Public License.  See the file "COPYING.LIB" in the main directory of this
    6. 

  6.  * archive for more details.
    7. 

  7.  */
    8. 

  8. #include <features.h>
    9. 

  9. 

  10. 	.text
    11. 

  11. 

  12. 	/*
    13. 

  13. 	 * long int syscall(long int sysno, ...)
    14. 

  14. 	 */
    15. 

  15. 	.global	syscall
    16. 

  16. 	.type	syscall, @function
    17. 

  17. 	.align	2
    18. 

  18. syscall:
    19. 

  19. 	stm	--sp, r3,r5,r6,lr
    20. 

  20. 	sub	lr, sp, -16
    21. 

  21. 	mov	r8, r12
    22. 

  22. 	ldm	lr, r3,r5,r9-r12
    23. 

  23. 	scall
    24. 

  24. 	cp.w	r12, -4095
    25. 

  25. 	brlo	.Ldone
    26. 

  26. 

  27. #ifdef __PIC__
    28. 

  28. 	lddpc	r6, .Lgot
    29. 

  29. .Lgotcalc:
    30. 

  30. 	rsub	r6, pc
    31. 

  31. # ifdef __UCLIBC_HAS_THREADS__
    32. 

  32. 	rsub	r3, r12, 0
    33. 

  33. 	mcall	r6[__errno_location@got]
    34. 

  34. 	st.w	r12[0], r3
    35. 

  35. # else
    36. 

  36. 	ld.w	r3, r6[errno@got]
    37. 

  37. 	neg	r12
    38. 

  38. 	st.w	r3[0], r12
    39. 

  39. # endif
    40. 

  40. #else
    41. 

  41. # ifdef __UCLIBC_HAS_THREADS__
    42. 

  42. 	rsub	r3, r12, 0
    43. 

  43. 	mcall	.Lerrno_location
    44. 

  44. 	st.w	r12[0], r3
    45. 

  45. # else
    46. 

  46. 	lddpc	r3, .Lerrno
    47. 

  47. 	neg	r12
    48. 

  48. 	st.w	r3[0], r12
    49. 

  49. # endif
    50. 

  50. #endif
    51. 

  51. 	mov	r12, -1
    52. 

  52. 

  53. .Ldone:
    54. 

  54. 	ldm	sp++, r3,r5,r6,pc
    55. 

  55. 

  56. 	.align	2
    57. 

  57. #ifdef __PIC__
    58. 

  58. .Lgot:
    59. 

  59. 	.long	.Lgotcalc - _GLOBAL_OFFSET_TABLE_
    60. 

  60. #else
    61. 

  61. # ifdef __UCLIBC_HAS_THREADS__
    62. 

  62. .Lerrno_location:
    63. 

  63. 	.long	__errno_location
    64. 

  64. # else
    65. 

  65. .Lerrno:
    66. 

  66. 	.long	errno
    67. 

  67. # endif
    68. 

  68. #endif
    69. 

  69. 

  70. 

  71. 	.size	syscall, . - syscall
    72.