1*0b57cec5SDimitry Andric//===-- xray_trampoline_mips.s ----------------------------------*- ASM -*-===// 2*0b57cec5SDimitry Andric// 3*0b57cec5SDimitry Andric// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric// See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric// 7*0b57cec5SDimitry Andric//===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric// 9*0b57cec5SDimitry Andric// This file is a part of XRay, a dynamic runtime instrumentation system. 10*0b57cec5SDimitry Andric// 11*0b57cec5SDimitry Andric// This implements the MIPS-specific assembler for the trampolines. 12*0b57cec5SDimitry Andric// 13*0b57cec5SDimitry Andric//===----------------------------------------------------------------------===// 14*0b57cec5SDimitry Andric 15*0b57cec5SDimitry Andric .text 16*0b57cec5SDimitry Andric .file "xray_trampoline_mips.S" 17*0b57cec5SDimitry Andric .globl __xray_FunctionEntry 18*0b57cec5SDimitry Andric .p2align 2 19*0b57cec5SDimitry Andric .type __xray_FunctionEntry,@function 20*0b57cec5SDimitry Andric__xray_FunctionEntry: 21*0b57cec5SDimitry Andric .cfi_startproc 22*0b57cec5SDimitry Andric .set noreorder 23*0b57cec5SDimitry Andric .cpload $t9 24*0b57cec5SDimitry Andric .set reorder 25*0b57cec5SDimitry Andric // Save argument registers before doing any actual work 26*0b57cec5SDimitry Andric .cfi_def_cfa_offset 36 27*0b57cec5SDimitry Andric addiu $sp, $sp, -36 28*0b57cec5SDimitry Andric sw $ra, 32($sp) 29*0b57cec5SDimitry Andric .cfi_offset 31, -4 30*0b57cec5SDimitry Andric sw $a3, 28($sp) 31*0b57cec5SDimitry Andric sw $a2, 24($sp) 32*0b57cec5SDimitry Andric sw $a1, 20($sp) 33*0b57cec5SDimitry Andric sw $a0, 16($sp) 34*0b57cec5SDimitry Andric sdc1 $f14, 8($sp) 35*0b57cec5SDimitry Andric sdc1 $f12, 0($sp) 36*0b57cec5SDimitry Andric 37*0b57cec5SDimitry Andric la $t9, _ZN6__xray19XRayPatchedFunctionE 38*0b57cec5SDimitry Andric lw $t9, 0($t9) 39*0b57cec5SDimitry Andric 40*0b57cec5SDimitry Andric beqz $t9, FunctionEntry_restore 41*0b57cec5SDimitry Andric 42*0b57cec5SDimitry Andric // a1=0 means that we are tracing an entry event 43*0b57cec5SDimitry Andric move $a1, $zero 44*0b57cec5SDimitry Andric // Function ID is in t0 (the first parameter). 45*0b57cec5SDimitry Andric move $a0, $t0 46*0b57cec5SDimitry Andric jalr $t9 47*0b57cec5SDimitry Andric 48*0b57cec5SDimitry AndricFunctionEntry_restore: 49*0b57cec5SDimitry Andric // Restore argument registers 50*0b57cec5SDimitry Andric ldc1 $f12, 0($sp) 51*0b57cec5SDimitry Andric ldc1 $f14, 8($sp) 52*0b57cec5SDimitry Andric lw $a0, 16($sp) 53*0b57cec5SDimitry Andric lw $a1, 20($sp) 54*0b57cec5SDimitry Andric lw $a2, 24($sp) 55*0b57cec5SDimitry Andric lw $a3, 28($sp) 56*0b57cec5SDimitry Andric lw $ra, 32($sp) 57*0b57cec5SDimitry Andric addiu $sp, $sp, 36 58*0b57cec5SDimitry Andric jr $ra 59*0b57cec5SDimitry AndricFunctionEntry_end: 60*0b57cec5SDimitry Andric .size __xray_FunctionEntry, FunctionEntry_end-__xray_FunctionEntry 61*0b57cec5SDimitry Andric .cfi_endproc 62*0b57cec5SDimitry Andric 63*0b57cec5SDimitry Andric .text 64*0b57cec5SDimitry Andric .globl __xray_FunctionExit 65*0b57cec5SDimitry Andric .p2align 2 66*0b57cec5SDimitry Andric .type __xray_FunctionExit,@function 67*0b57cec5SDimitry Andric__xray_FunctionExit: 68*0b57cec5SDimitry Andric .cfi_startproc 69*0b57cec5SDimitry Andric .set noreorder 70*0b57cec5SDimitry Andric .cpload $t9 71*0b57cec5SDimitry Andric .set reorder 72*0b57cec5SDimitry Andric // Save return registers before doing any actual work. 73*0b57cec5SDimitry Andric .cfi_def_cfa_offset 36 74*0b57cec5SDimitry Andric addiu $sp, $sp, -36 75*0b57cec5SDimitry Andric sw $ra, 32($sp) 76*0b57cec5SDimitry Andric .cfi_offset 31, -4 77*0b57cec5SDimitry Andric sw $a1, 28($sp) 78*0b57cec5SDimitry Andric sw $a0, 24($sp) 79*0b57cec5SDimitry Andric sw $v1, 20($sp) 80*0b57cec5SDimitry Andric sw $v0, 16($sp) 81*0b57cec5SDimitry Andric sdc1 $f2, 8($sp) 82*0b57cec5SDimitry Andric sdc1 $f0, 0($sp) 83*0b57cec5SDimitry Andric 84*0b57cec5SDimitry Andric la $t9, _ZN6__xray19XRayPatchedFunctionE 85*0b57cec5SDimitry Andric lw $t9, 0($t9) 86*0b57cec5SDimitry Andric 87*0b57cec5SDimitry Andric beqz $t9, FunctionExit_restore 88*0b57cec5SDimitry Andric 89*0b57cec5SDimitry Andric // a1=1 means that we are tracing an exit event 90*0b57cec5SDimitry Andric li $a1, 1 91*0b57cec5SDimitry Andric // Function ID is in t0 (the first parameter). 92*0b57cec5SDimitry Andric move $a0, $t0 93*0b57cec5SDimitry Andric jalr $t9 94*0b57cec5SDimitry Andric 95*0b57cec5SDimitry AndricFunctionExit_restore: 96*0b57cec5SDimitry Andric // Restore return registers 97*0b57cec5SDimitry Andric ldc1 $f0, 0($sp) 98*0b57cec5SDimitry Andric ldc1 $f2, 8($sp) 99*0b57cec5SDimitry Andric lw $v0, 16($sp) 100*0b57cec5SDimitry Andric lw $v1, 20($sp) 101*0b57cec5SDimitry Andric lw $a0, 24($sp) 102*0b57cec5SDimitry Andric lw $a1, 28($sp) 103*0b57cec5SDimitry Andric lw $ra, 32($sp) 104*0b57cec5SDimitry Andric addiu $sp, $sp, 36 105*0b57cec5SDimitry Andric jr $ra 106*0b57cec5SDimitry Andric 107*0b57cec5SDimitry AndricFunctionExit_end: 108*0b57cec5SDimitry Andric .size __xray_FunctionExit, FunctionExit_end-__xray_FunctionExit 109*0b57cec5SDimitry Andric .cfi_endproc 110