| //===-- xray_trampoline_mips.s ----------------------------------*- ASM -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of XRay, a dynamic runtime instrumentation system. |
| // |
| // This implements the MIPS-specific assembler for the trampolines. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| .text |
| .file "xray_trampoline_mips.S" |
| .globl __xray_FunctionEntry |
| .p2align 2 |
| .type __xray_FunctionEntry,@function |
| __xray_FunctionEntry: |
| .cfi_startproc |
| .set noreorder |
| .cpload $t9 |
| .set reorder |
| // Save argument registers before doing any actual work |
| .cfi_def_cfa_offset 36 |
| addiu $sp, $sp, -36 |
| sw $ra, 32($sp) |
| .cfi_offset 31, -4 |
| sw $a3, 28($sp) |
| sw $a2, 24($sp) |
| sw $a1, 20($sp) |
| sw $a0, 16($sp) |
| sdc1 $f14, 8($sp) |
| sdc1 $f12, 0($sp) |
| |
| la $t9, _ZN6__xray19XRayPatchedFunctionE |
| lw $t9, 0($t9) |
| |
| beqz $t9, FunctionEntry_restore |
| |
| // a1=0 means that we are tracing an entry event |
| move $a1, $zero |
| // Function ID is in t0 (the first parameter). |
| move $a0, $t0 |
| jalr $t9 |
| |
| FunctionEntry_restore: |
| // Restore argument registers |
| ldc1 $f12, 0($sp) |
| ldc1 $f14, 8($sp) |
| lw $a0, 16($sp) |
| lw $a1, 20($sp) |
| lw $a2, 24($sp) |
| lw $a3, 28($sp) |
| lw $ra, 32($sp) |
| addiu $sp, $sp, 36 |
| jr $ra |
| FunctionEntry_end: |
| .size __xray_FunctionEntry, FunctionEntry_end-__xray_FunctionEntry |
| .cfi_endproc |
| |
| .text |
| .globl __xray_FunctionExit |
| .p2align 2 |
| .type __xray_FunctionExit,@function |
| __xray_FunctionExit: |
| .cfi_startproc |
| .set noreorder |
| .cpload $t9 |
| .set reorder |
| // Save return registers before doing any actual work. |
| .cfi_def_cfa_offset 36 |
| addiu $sp, $sp, -36 |
| sw $ra, 32($sp) |
| .cfi_offset 31, -4 |
| sw $a1, 28($sp) |
| sw $a0, 24($sp) |
| sw $v1, 20($sp) |
| sw $v0, 16($sp) |
| sdc1 $f2, 8($sp) |
| sdc1 $f0, 0($sp) |
| |
| la $t9, _ZN6__xray19XRayPatchedFunctionE |
| lw $t9, 0($t9) |
| |
| beqz $t9, FunctionExit_restore |
| |
| // a1=1 means that we are tracing an exit event |
| li $a1, 1 |
| // Function ID is in t0 (the first parameter). |
| move $a0, $t0 |
| jalr $t9 |
| |
| FunctionExit_restore: |
| // Restore return registers |
| ldc1 $f0, 0($sp) |
| ldc1 $f2, 8($sp) |
| lw $v0, 16($sp) |
| lw $v1, 20($sp) |
| lw $a0, 24($sp) |
| lw $a1, 28($sp) |
| lw $ra, 32($sp) |
| addiu $sp, $sp, 36 |
| jr $ra |
| |
| FunctionExit_end: |
| .size __xray_FunctionExit, FunctionExit_end-__xray_FunctionExit |
| .cfi_endproc |
