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sysdeps
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sysdep.S

sysdep.S 2.1 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.    see <http://www.gnu.org/licenses/>.  */
    17. 

  17. 

  18. #include <features.h>
    19. 

  19. #include "sysdep.h"
    20. 

  20. 

  21. /* The syscall stubs jump here when they detect an error, bot for PIC and
    22. 

  22.    non-PIC.  */
    23. 

  23. 

  24. 	.syntax	no_register_prefix
    25. 

  25. 

  26. ENTRY (__syscall_error)
    27. 

  27. 	neg.d	r10,r10
    28. 

  28. 

  29. #ifdef	__UCLIBC_HAS_THREADS__
    30. 

  30. 	subq	4,sp
    31. 

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

  32. 	subq	4,sp
    33. 

  33. 	move 	srp,[sp]
    34. 

  34. 

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

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

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

  38. 	PLTCALL	(HIDDEN_JUMPTARGET(__errno_location))
    39. 

  39. 

  40. 	move	[sp+],srp
    41. 

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

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

  43. 

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

  45. #ifdef __arch_v32
    46. 

  46. # ifdef __PIC__
    47. 

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

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

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

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

  51. 	lapc	C_SYMBOL_NAME(errno),acr
    52. 

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

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

  54. #else /* not __arch_v32 */
    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 /* not __arch_v32 */
    62. 

  62. #endif /* __UCLIBC_HAS_THREADS__ */
    63. 

  63. 

  64. #ifdef __PIC__
    65. 

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

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

  67.    one we want to use.
    68. 

  68. 

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

  70. 

  71. 	moveq	-1,r10
    72. 

  72. 	Ret
    73. 

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

  74. #else
    75. 

  75. 	Ret
    76. 

  76. 	moveq	-1,r10
    77. 

  77. #endif
    78. 

  78. 

  79. END (__syscall_error)
    80.