Home Explore Help
Register Sign In
phyus
/
linux-vybrid_public
8
0
Fork 0
Files Issues 0 Pull Requests 0 Wiki
Tree: bcf988a194
Branches Tags
linux-vybrid_pu...
/
arch
/
powerpc
/
kernel
/
misc.S

misc.S 1.1 KB
History Raw

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 
  1. /*
    2. 

  2.  * This file contains miscellaneous low-level functions.
    3. 

  3.  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
    4. 

  4.  *
    5. 

  5.  * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
    6. 

  6.  * and Paul Mackerras.
    7. 

  7.  *
    8. 

  8.  * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
    9. 

  9.  * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
    10. 

  10.  *
    11. 

  11.  * This program is free software; you can redistribute it and/or
    12. 

  12.  * modify it under the terms of the GNU General Public License
    13. 

  13.  * as published by the Free Software Foundation; either version
    14. 

  14.  * 2 of the License, or (at your option) any later version.
    15. 

  15.  */
    16. 

  16. #include <asm/ppc_asm.h>
    17. 

  17. #include <asm/unistd.h>
    18. 

  18. 

  19. 	.text
    20. 

  20. 

  21. /*
    22. 

  22.  * Returns (address we are running at) - (address we were linked at)
    23. 

  23.  * for use before the text and data are mapped to KERNELBASE.
    24. 

  24.  */
    25. 

  25. 

  26. _GLOBAL(reloc_offset)
    27. 

  27. 	mflr	r0
    28. 

  28. 	bl	1f
    29. 

  29. 1:	mflr	r3
    30. 

  30. 	LOAD_REG_IMMEDIATE(r4,1b)
    31. 

  31. 	subf	r3,r4,r3
    32. 

  32. 	mtlr	r0
    33. 

  33. 	blr
    34. 

  34. 

  35. /*
    36. 

  36.  * add_reloc_offset(x) returns x + reloc_offset().
    37. 

  37.  */
    38. 

  38. _GLOBAL(add_reloc_offset)
    39. 

  39. 	mflr	r0
    40. 

  40. 	bl	1f
    41. 

  41. 1:	mflr	r5
    42. 

  42. 	LOAD_REG_IMMEDIATE(r4,1b)
    43. 

  43. 	subf	r5,r4,r5
    44. 

  44. 	add	r3,r3,r5
    45. 

  45. 	mtlr	r0
    46. 

  46. 	blr
    47. 

  47. 

  48. _GLOBAL(kernel_execve)
    49. 

  49. 	li	r0,__NR_execve
    50. 

  50. 	sc
    51. 

  51. 	bnslr
    52. 

  52. 	neg	r3,r3
    53. 

  53. 	blr
    54.