arch/s390/kernel/mcount.S

   1 /*
   2  * Copyright IBM Corp. 2008
   3  *
   4  *   Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
   5  *
   6  */
   7
   8 #include <asm/asm-offsets.h>
   9
  10 #ifndef CONFIG_64BIT
  11 .globl _mcount
  12 _mcount:
  13         stm     %r0,%r5,8(%r15)
  14         st      %r14,56(%r15)
  15         lr      %r1,%r15
  16         ahi     %r15,-96
  17         l       %r3,100(%r15)
  18         la      %r2,0(%r14)
  19         st      %r1,__SF_BACKCHAIN(%r15)
  20         la      %r3,0(%r3)
  21         bras    %r14,0f
  22         .long   ftrace_trace_function
  23 0:      l       %r14,0(%r14)
  24         l       %r14,0(%r14)
  25         basr    %r14,%r14
  26         ahi     %r15,96
  27         lm      %r0,%r5,8(%r15)
  28         l       %r14,56(%r15)
  29         br      %r14
  30
  31 .globl ftrace_stub
  32 ftrace_stub:
  33         br      %r14
  34
  35 #else /* CONFIG_64BIT */
  36
  37 .globl _mcount
  38 _mcount:
  39         stmg    %r0,%r5,16(%r15)
  40         stg     %r14,112(%r15)
  41         lgr     %r1,%r15
  42         aghi    %r15,-160
  43         stg     %r1,__SF_BACKCHAIN(%r15)
  44         lgr     %r2,%r14
  45         lg      %r3,168(%r15)
  46         larl    %r14,ftrace_trace_function
  47         lg      %r14,0(%r14)
  48         basr    %r14,%r14
  49         aghi    %r15,160
  50         lmg     %r0,%r5,16(%r15)
  51         lg      %r14,112(%r15)
  52         br      %r14
  53
  54 .globl ftrace_stub
  55 ftrace_stub:
  56         br      %r14
  57
  58 #endif /* CONFIG_64BIT */