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syscall.S

syscall.S 1.0 KB
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  1. /*
    2. 

  2.  * Copyright (C) 2016 Andes Technology, Inc.
    3. 

  3.  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
    4. 

  4.  */
    5. 

  5. 

  6. #include <sys/syscall.h>
    7. 

  7. #include <sysdep.h>
    8. 

  8. 

  9. 	.text
    10. 

  10. #ifdef PIC
    11. 

  11. 	.pic
    12. 

  12. #endif
    13. 

  13. 	.align 2
    14. 

  14. 

  15. 

  16. #ifdef PIC
    17. 

  17. #ifdef __NDS32_N1213_43U1H__
    18. 

  18. 1:
    19. 

  19. 	ret
    20. 

  20. 99:
    21. 

  21. 	addi 	$r2, $lp, 0
    22. 

  22. 	jal 	1b
    23. 

  23. 	sethi 	$r1, hi20(_GLOBAL_OFFSET_TABLE_)
    24. 

  24. 	ori 	$r1, $r1, lo12(_GLOBAL_OFFSET_TABLE_+4)
    25. 

  25. 	add 	$r1, $lp, $r1
    26. 

  26. 	addi 	$lp, $r2, 0
    27. 

  27. #else		/* !__NDS32_N1213_43U1H__ */
    28. 

  28. 99:
    29. 

  29. 	mfusr 	$r15, $PC
    30. 

  30. 	sethi 	$r1, hi20(_GLOBAL_OFFSET_TABLE_ + 4)
    31. 

  31. 	ori 	$r1, $r1, lo12(_GLOBAL_OFFSET_TABLE_ + 8)
    32. 

  32. 	add 	$r1, $r15, $r1
    33. 

  33. #endif		/* end of __NDS32_N1213_43U1H__ */
    34. 

  34. 	sethi 	$r15, hi20(__syscall_error@PLT)
    35. 

  35. 	ori 	$r15, $r15, lo12(__syscall_error@PLT)
    36. 

  36. 	add 	$r15, $r15, $r1
    37. 

  37. 	jr 		$r15
    38. 

  38. #else		/* !PIC	*/
    39. 

  39. 99:
    40. 

  40. 	j __syscall_error
    41. 

  41. #endif		/* end of PIC */
    42. 

  42. 

  43. #ifdef PIC	
    44. 

  44. 	.pic 
    45. 

  45. #endif
    46. 

  46. 

  47. 	.align 2
    48. 

  48. 	.globl syscall
    49. 

  49. 	.func syscall
    50. 

  50. 	.type syscall, @function
    51. 

  51. 

  52. syscall:
    53. 

  53. 	syscall __NR_syscall
    54. 

  54. 	bgez $r0, 2f
    55. 

  55. 	sltsi $r1, $r0, -4096; 
    56. 

  56. 	beqz $r1, 99b; 
    57. 

  57. 2:
    58. 

  58. 	ret
    59. 

  59. 	.endfunc 
    60. 

  60. 	.size syscall, .-syscall
    61.