/arch/x86/lib/thunk_32.S

https://bitbucket.org/ndreys/linux-sunxi · Assembly · 29 lines · 18 code · 3 blank · 8 comment · 0 complexity · 43eab24e57e986b1a441b9baa43f2ec5 MD5 · raw file 

    

  1. /*
    2. 

  2.  * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)
    3. 

  3.  * Copyright 2008 by Steven Rostedt, Red Hat, Inc
    4. 

  4.  *  (inspired by Andi Kleen's thunk_64.S)
    5. 

  5.  * Subject to the GNU public license, v.2. No warranty of any kind.
    6. 

  6.  */
    7. 

  7. 

  8. 	#include <linux/linkage.h>
    9. 

  9. 

  10. #ifdef CONFIG_TRACE_IRQFLAGS
    11. 

  11. 	/* put return address in eax (arg1) */
    12. 

  12. 	.macro thunk_ra name,func
    13. 

  13. 	.globl \name
    14. 

  14. \name:
    15. 

  15. 	pushl %eax
    16. 

  16. 	pushl %ecx
    17. 

  17. 	pushl %edx
    18. 

  18. 	/* Place EIP in the arg1 */
    19. 

  19. 	movl 3*4(%esp), %eax
    20. 

  20. 	call \func
    21. 

  21. 	popl %edx
    22. 

  22. 	popl %ecx
    23. 

  23. 	popl %eax
    24. 

  24. 	ret
    25. 

  25. 	.endm
    26. 

  26. 

  27. 	thunk_ra trace_hardirqs_on_thunk,trace_hardirqs_on_caller
    28. 

  28. 	thunk_ra trace_hardirqs_off_thunk,trace_hardirqs_off_caller
    29. 

  29. #endif
    30.