Sākums Izpētīt Palīdzība
Pierakstīties
oss
/
uclibc-ng
4
1
Atdalīts 0
Faili Problēmas 3 Izmaiņu pieprasījumi 0 Vikivietne
Koks: e9e15c687c
Atzari Tagi
uclibc-ng
/
libc
/
sysdeps
/
linux
/
i386
/
bsd-setjmp.S

bsd-setjmp.S 1.9 KB
Vēsture Neapstrādāts

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960 
  1. /* BSD `setjmp' entry point to `sigsetjmp (..., 1)'.  i386 version.
    2. 

  2.    Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
    3. 

  3.    This file is part of the GNU C Library.
    4. 

  4. 

  5.    The GNU C Library is free software; you can redistribute it and/or
    6. 

  6.    modify it under the terms of the GNU Lesser General Public
    7. 

  7.    License as published by the Free Software Foundation; either
    8. 

  8.    version 2.1 of the License, or (at your option) any later version.
    9. 

  9. 

  10.    The GNU C Library is distributed in the hope that it will be useful,
    11. 

  11.    but WITHOUT ANY WARRANTY; without even the implied warranty of
    12. 

  12.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13. 

  13.    Lesser General Public License for more details.
    14. 

  14. 

  15.    You should have received a copy of the GNU Lesser General Public
    16. 

  16.    License along with the GNU C Library; if not, write to the Free
    17. 

  17.    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    18. 

  18.    02111-1307 USA.  */
    19. 

  19. 

  20. #define _ASM
    21. 

  21. #define _SETJMP_H
    22. 

  22. #include <bits/setjmp.h>
    23. 

  23. 

  24. .global setjmp
    25. 

  25. .type   setjmp,%function
    26. 

  26. setjmp:
    27. 

  27. 	movl 4   (%esp), %eax
    28. 

  28. 	/* Save registers.  */
    29. 

  29. 	movl %ebx, (0 *4)(%eax)
    30. 

  30. 	movl %esi, (1 *4)(%eax)
    31. 

  31. 	movl %edi, (2 *4)(%eax)
    32. 

  32. 	/* Save SP as it will be after we return.  */
    33. 

  33. 	leal 4   (%esp), %ecx
    34. 

  34. 	movl %ecx, (4 *4)(%eax)
    35. 

  35. 	/* Save PC we are returning to now.  */
    36. 

  36. 	movl 0 (%esp), %ecx
    37. 

  37. 	movl %ecx, (5 *4)(%eax)
    38. 

  38. 	/* Save caller's frame pointer.  */
    39. 

  39. 	movl %ebp, (3 *4)(%eax)  
    40. 

  40. 

  41. 	/* Call __sigjmp_save.  */
    42. 

  42. 	pushl $1
    43. 

  43. 	pushl 8(%esp)
    44. 

  44. #ifdef	__PIC__
    45. 

  45. 	/* We cannot use the PLT, because it requires that %ebx be set, but
    46. 

  46. 	   we can't save and restore our caller's value.  Instead, we do an
    47. 

  47. 	   indirect jump through the GOT, using for the temporary register
    48. 

  48. 	   %ecx, which is call-clobbered.  */
    49. 

  49. 	call here2
    50. 

  50. here2:	popl %ecx
    51. 

  51. 	addl $_GLOBAL_OFFSET_TABLE_+[.-here2], %ecx
    52. 

  52. 	movl    __sigjmp_save    @GOT  (%ecx), %ecx
    53. 

  53. 	call *%ecx
    54. 

  54. #else
    55. 

  55. 	call __sigjmp_save
    56. 

  56. #endif
    57. 

  57. 	popl %ecx
    58. 

  58. 	popl %edx
    59. 

  59. 	ret
    60. 

  60. .size setjmp,.-setjmp
    61.