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sysdeps
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sysdep.S

sysdep.S 2.0 KB
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  1. /* Copyright (C) 2001 Free Software Foundation, Inc.
    2. 

  2.    This file is part of the GNU C Library.
    3. 

  3. 

  4.    The GNU C Library is free software; you can redistribute it and/or
    5. 

  5.    modify it under the terms of the GNU Library General Public License as
    6. 

  6.    published by the Free Software Foundation; either version 2 of the
    7. 

  7.    License, or (at your option) any later version.
    8. 

  8. 

  9.    The GNU C Library is distributed in the hope that it will be useful,
    10. 

  10.    but WITHOUT ANY WARRANTY; without even the implied warranty of
    11. 

  11.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12. 

  12.    Library General Public License for more details.
    13. 

  13. 

  14.    You should have received a copy of the GNU Library General Public
    15. 

  15.    License along with the GNU C Library; see the file COPYING.LIB.  If not,
    16. 

  16.    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    17. 

  17.    Boston, MA 02111-1307, USA.  */
    18. 

  18. 

  19. #include <features.h>
    20. 

  20. #include <sysdep.h>
    21. 

  21. 

  22. /* Make space for the errno variable.  */
    23. 

  23. 

  24. 	.globl	C_SYMBOL_NAME(errno)
    25. 

  25. 	.type	C_SYMBOL_NAME(errno),@object
    26. 

  26. 	.lcomm	C_SYMBOL_NAME(errno),4
    27. 

  27. 

  28. 	errno = _errno
    29. 

  29. 

  30. 	/* weak_alias (errno, _errno) */
    31. 

  31. 

  32. 

  33. /* The syscall stubs jump here when they detect an error, bot for PIC and
    34. 

  34.    non-PIC.  */
    35. 

  35. 

  36. 	.syntax	no_register_prefix
    37. 

  37. 

  38. ENTRY (__syscall_error)
    39. 

  39. 	neg.d	r10,r10
    40. 

  40. 

  41. #ifdef	__UCLIBC_HAS_THREADS__
    42. 

  42. 	push	r10
    43. 

  43. 	push	srp
    44. 

  44. 

  45. 	/* Note that __syscall_error is only visible within this library,
    46. 

  46. 	   and no-one passes it on as a pointer, so can assume that R0 (GOT
    47. 

  47. 	   pointer) is correctly set up.  */
    48. 

  48. 	PLTCALL	(__errno_location)
    49. 

  49. 

  50. 	pop	srp
    51. 

  51. 	pop	r11
    52. 

  52. 	move.d	r11,[r10]
    53. 

  53. 

  54. #else /* not __UCLIBC_HAS_THREADS__ */
    55. 

  55. # ifdef __PIC__
    56. 

  56. 	move.d	[r0+C_SYMBOL_NAME(errno:GOT)],r9
    57. 

  57. 	move.d  r10,[r9]
    58. 

  58. # else
    59. 

  59. 	move.d	r10,[C_SYMBOL_NAME(errno)]
    60. 

  60. # endif
    61. 

  61. #endif /* __UCLIBC_HAS_THREADS__ */
    62. 

  62. 

  63. #ifdef __PIC__
    64. 

  64. /* PIC callers are supposed to have R0 on stack, ready for us to restore.
    65. 

  65.    Callers are only allowed from within this DSO, so the GOT in r0 is the
    66. 

  66.    one we want to use.
    67. 

  67. 

  68.    (Don't use "ret" - it's a macro).   */
    69. 

  69. 

  70. 	moveq	-1,r10
    71. 

  71. 	Ret
    72. 

  72. 	pop	r0
    73. 

  73. #else
    74. 

  74. 	Ret
    75. 

  75. 	moveq	-1,r10
    76. 

  76. #endif
    77. 

  77. 

  78. END (__syscall_error)
    79.