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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/contrib/llvm-project/compiler-rt/lib/xray/xray_trampoline_mips.S
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//===-- xray_trampoline_mips.s ----------------------------------*- ASM -*-===//

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//

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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

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// See https://llvm.org/LICENSE.txt for license information.

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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

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//

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//===----------------------------------------------------------------------===//

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//

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// This file is a part of XRay, a dynamic runtime instrumentation system.

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//

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// This implements the MIPS-specific assembler for the trampolines.

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//

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//===----------------------------------------------------------------------===//

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  .text

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  .file "xray_trampoline_mips.S"

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  .globl __xray_FunctionEntry

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  .p2align 2

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  .type __xray_FunctionEntry,@function

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__xray_FunctionEntry:

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  .cfi_startproc

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  .set noreorder

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  .cpload $t9

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  .set reorder

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  // Save argument registers before doing any actual work

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  .cfi_def_cfa_offset 36

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  addiu  $sp, $sp, -36

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  sw     $ra, 32($sp)

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  .cfi_offset 31, -4

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  sw     $a3, 28($sp)

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  sw     $a2, 24($sp)

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  sw     $a1, 20($sp)

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  sw     $a0, 16($sp)

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  sdc1	 $f14, 8($sp)

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  sdc1	 $f12, 0($sp)

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  la     $t9, _ZN6__xray19XRayPatchedFunctionE

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  lw     $t9, 0($t9)

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  beqz   $t9, FunctionEntry_restore

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  // a1=0 means that we are tracing an entry event

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  move   $a1, $zero

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  // Function ID is in t0 (the first parameter).

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  move   $a0, $t0

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  jalr   $t9

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FunctionEntry_restore:

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  // Restore argument registers

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  ldc1   $f12, 0($sp)

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  ldc1   $f14, 8($sp)

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  lw     $a0, 16($sp)

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  lw     $a1, 20($sp)

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  lw     $a2, 24($sp)

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  lw     $a3, 28($sp)

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  lw     $ra, 32($sp)

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  addiu	 $sp, $sp, 36

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  jr     $ra

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FunctionEntry_end:

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  .size __xray_FunctionEntry, FunctionEntry_end-__xray_FunctionEntry

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  .cfi_endproc

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  .text

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  .globl __xray_FunctionExit

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  .p2align 2

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  .type __xray_FunctionExit,@function

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__xray_FunctionExit:

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  .cfi_startproc

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  .set noreorder

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  .cpload $t9

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  .set reorder

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  // Save return registers before doing any actual work.

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  .cfi_def_cfa_offset 36

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  addiu  $sp, $sp, -36

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  sw     $ra, 32($sp)

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  .cfi_offset 31, -4

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  sw     $a1, 28($sp)

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  sw     $a0, 24($sp)

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  sw     $v1, 20($sp)

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  sw     $v0, 16($sp)

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  sdc1   $f2, 8($sp)

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  sdc1   $f0, 0($sp)

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  la     $t9, _ZN6__xray19XRayPatchedFunctionE

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  lw     $t9, 0($t9)

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  beqz	 $t9, FunctionExit_restore

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  // a1=1 means that we are tracing an exit event

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  li     $a1, 1

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  // Function ID is in t0 (the first parameter).

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  move   $a0, $t0

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  jalr   $t9

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FunctionExit_restore:

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  // Restore return registers

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  ldc1   $f0, 0($sp)

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  ldc1   $f2, 8($sp)

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  lw     $v0, 16($sp)

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  lw     $v1, 20($sp)

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  lw     $a0, 24($sp)

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  lw     $a1, 28($sp)

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  lw     $ra, 32($sp)

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  addiu  $sp, $sp, 36

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  jr     $ra

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FunctionExit_end:

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  .size __xray_FunctionExit, FunctionExit_end-__xray_FunctionExit

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  .cfi_endproc

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