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