arch/x86/lib/thunk_32.S

   1 /*
   2  * Trampoline to trace irqs off. (otherwise CALLER_ADDR1 might crash)
   3  * Copyright 2008 by Steven Rostedt, Red Hat, Inc
   4  *  (inspired by Andi Kleen's thunk_64.S)
   5  * Subject to the GNU public license, v.2. No warranty of any kind.
   6  */
   7
   8         #include <linux/linkage.h>
   9
  10 #define ARCH_TRACE_IRQS_ON                      \
  11         pushl %eax;                             \
  12         pushl %ecx;                             \
  13         pushl %edx;                             \
  14         call trace_hardirqs_on;                 \
  15         popl %edx;                              \
  16         popl %ecx;                              \
  17         popl %eax;
  18
  19 #define ARCH_TRACE_IRQS_OFF                     \
  20         pushl %eax;                             \
  21         pushl %ecx;                             \
  22         pushl %edx;                             \
  23         call trace_hardirqs_off;                \
  24         popl %edx;                              \
  25         popl %ecx;                              \
  26         popl %eax;
  27
  28 #ifdef CONFIG_TRACE_IRQFLAGS
  29         /* put return address in eax (arg1) */
  30         .macro thunk_ra name,func
  31         .globl \name
  32 \name:
  33         pushl %eax
  34         pushl %ecx
  35         pushl %edx
  36         /* Place EIP in the arg1 */
  37         movl 3*4(%esp), %eax
  38         call \func
  39         popl %edx
  40         popl %ecx
  41         popl %eax
  42         ret
  43         .endm
  44
  45         thunk_ra trace_hardirqs_on_thunk,trace_hardirqs_on_caller
  46         thunk_ra trace_hardirqs_off_thunk,trace_hardirqs_off_caller
  47 #endif