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sysdeps
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sysdep.S

sysdep.S 2.2 KB
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  1. /* Copyright (C) 2001, 2003 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. /* The syscall stubs jump here when they detect an error, bot for PIC and
    23. 

  23.    non-PIC.  */
    24. 

  24. 

  25. 	.syntax	no_register_prefix
    26. 

  26. 

  27. ENTRY (__syscall_error)
    28. 

  28. 	neg.d	r10,r10
    29. 

  29. 

  30. #ifdef	__UCLIBC_HAS_THREADS__
    31. 

  31. 	subq	4,sp
    32. 

  32. 	move.d	r10,[sp]
    33. 

  33. 	subq	4,sp
    34. 

  34. 	move 	srp,[sp]
    35. 

  35. 

  36. 	/* Note that __syscall_error is only visible within this library,
    37. 

  37. 	   and no-one passes it on as a pointer, so can assume that R0 (GOT
    38. 

  38. 	   pointer) is correctly set up.  */
    39. 

  39. 	PLTCALL	(HIDDEN_JUMPTARGET(__errno_location))
    40. 

  40. 

  41. 	move	[sp+],srp
    42. 

  42. 	move.d	[sp+],r11
    43. 

  43. 	move.d	r11,[r10]
    44. 

  44. 

  45. #else /* not __UCLIBC_HAS_THREADS__ */
    46. 

  46. #ifdef __arch_v32
    47. 

  47. # ifdef __PIC__
    48. 

  48. 	addo.d	C_SYMBOL_NAME(errno:GOT),r0,acr
    49. 

  49. 	move.d	[acr],r9
    50. 

  50. 	move.d	r10,[r9]
    51. 

  51. # else /* not __PIC__ */
    52. 

  52. 	lapc	C_SYMBOL_NAME(errno),acr
    53. 

  53. 	move.d	r10,[r9]
    54. 

  54. # endif /* not __PIC__ */
    55. 

  55. #else /* not __arch_v32 */
    56. 

  56. # ifdef __PIC__
    57. 

  57. 	move.d	[r0+C_SYMBOL_NAME(errno:GOT)],r9
    58. 

  58. 	move.d  r10,[r9]
    59. 

  59. # else
    60. 

  60. 	move.d	r10,[C_SYMBOL_NAME(errno)]
    61. 

  61. # endif
    62. 

  62. #endif /* not __arch_v32 */
    63. 

  63. #endif /* __UCLIBC_HAS_THREADS__ */
    64. 

  64. 

  65. #ifdef __PIC__
    66. 

  66. /* PIC callers are supposed to have R0 on stack, ready for us to restore.
    67. 

  67.    Callers are only allowed from within this DSO, so the GOT in r0 is the
    68. 

  68.    one we want to use.
    69. 

  69. 

  70.    (Don't use "ret" - it's a macro).   */
    71. 

  71. 

  72. 	moveq	-1,r10
    73. 

  73. 	Ret
    74. 

  74. 	move.d	[sp+],r0
    75. 

  75. #else
    76. 

  76. 	Ret
    77. 

  77. 	moveq	-1,r10
    78. 

  78. #endif
    79. 

  79. 

  80. END (__syscall_error)
    81.