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      1 //===-- xray_trampoline_mips.s ----------------------------------*- ASM -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file is a part of XRay, a dynamic runtime instrumentation system.
     11 //
     12 // This implements the MIPS-specific assembler for the trampolines.
     13 //
     14 //===----------------------------------------------------------------------===//
     15 
     16   .text
     17   .file "xray_trampoline_mips.S"
     18   .globl __xray_FunctionEntry
     19   .p2align 2
     20   .type __xray_FunctionEntry,@function
     21 __xray_FunctionEntry:
     22   .cfi_startproc
     23   .set noreorder
     24   .cpload $t9
     25   .set reorder
     26   // Save argument registers before doing any actual work
     27   .cfi_def_cfa_offset 36
     28   addiu  $sp, $sp, -36
     29   sw     $ra, 32($sp)
     30   .cfi_offset 31, -4
     31   sw     $a3, 28($sp)
     32   sw     $a2, 24($sp)
     33   sw     $a1, 20($sp)
     34   sw     $a0, 16($sp)
     35   sdc1	 $f14, 8($sp)
     36   sdc1	 $f12, 0($sp)
     37 
     38   la     $t9, _ZN6__xray19XRayPatchedFunctionE
     39   lw     $t9, 0($t9)
     40 
     41   beqz   $t9, FunctionEntry_restore
     42 
     43   // a1=0 means that we are tracing an entry event
     44   move   $a1, $zero
     45   // Function ID is in t0 (the first parameter).
     46   move   $a0, $t0
     47   jalr   $t9
     48 
     49 FunctionEntry_restore:
     50   // Restore argument registers
     51   ldc1   $f12, 0($sp)
     52   ldc1   $f14, 8($sp)
     53   lw     $a0, 16($sp)
     54   lw     $a1, 20($sp)
     55   lw     $a2, 24($sp)
     56   lw     $a3, 28($sp)
     57   lw     $ra, 32($sp)
     58   addiu	 $sp, $sp, 36
     59   jr     $ra
     60 FunctionEntry_end:
     61   .size __xray_FunctionEntry, FunctionEntry_end-__xray_FunctionEntry
     62   .cfi_endproc
     63 
     64   .text
     65   .globl __xray_FunctionExit
     66   .p2align 2
     67   .type __xray_FunctionExit,@function
     68 __xray_FunctionExit:
     69   .cfi_startproc
     70   .set noreorder
     71   .cpload $t9
     72   .set reorder
     73   // Save return registers before doing any actual work.
     74   .cfi_def_cfa_offset 36
     75   addiu  $sp, $sp, -36
     76   sw     $ra, 32($sp)
     77   .cfi_offset 31, -4
     78   sw     $a1, 28($sp)
     79   sw     $a0, 24($sp)
     80   sw     $v1, 20($sp)
     81   sw     $v0, 16($sp)
     82   sdc1   $f2, 8($sp)
     83   sdc1   $f0, 0($sp)
     84 
     85   la     $t9, _ZN6__xray19XRayPatchedFunctionE
     86   lw     $t9, 0($t9)
     87 
     88   beqz	 $t9, FunctionExit_restore
     89 
     90   // a1=1 means that we are tracing an exit event
     91   li     $a1, 1
     92   // Function ID is in t0 (the first parameter).
     93   move   $a0, $t0
     94   jalr   $t9
     95 
     96 FunctionExit_restore:
     97   // Restore return registers
     98   ldc1   $f0, 0($sp)
     99   ldc1   $f2, 8($sp)
    100   lw     $v0, 16($sp)
    101   lw     $v1, 20($sp)
    102   lw     $a0, 24($sp)
    103   lw     $a1, 28($sp)
    104   lw     $ra, 32($sp)
    105   addiu  $sp, $sp, 36
    106   jr     $ra
    107 
    108 FunctionExit_end:
    109   .size __xray_FunctionExit, FunctionExit_end-__xray_FunctionExit
    110   .cfi_endproc
    111