| 1 | //===-- xray_trampoline_hexagon.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 hexagon-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 | #include "../builtins/assembly.h" |
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| 16 | #include "../sanitizer_common/sanitizer_asm.h" |
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| 17 | |
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| 18 | .macro SAVE_REGISTERS |
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| 19 | memw(sp+#0)=r0 |
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| 20 | memw(sp+#4)=r1 |
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| 21 | memw(sp+#8)=r2 |
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| 22 | memw(sp+#12)=r3 |
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| 23 | memw(sp+#16)=r4 |
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| 24 | .endm |
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| 25 | .macro RESTORE_REGISTERS |
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| 26 | r0=memw(sp+#0) |
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| 27 | r1=memw(sp+#4) |
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| 28 | r2=memw(sp+#8) |
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| 29 | r3=memw(sp+#12) |
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| 30 | r4=memw(sp+#16) |
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| 31 | .endm |
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| 32 | |
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| 33 | .macro CALL_PATCHED_FUNC entry_type |
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| 34 | // if (xray::XRayPatchedFunctionE != NULL) |
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| 35 | // xray::XRayPatchedFunctionE(FuncType); |
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| 36 | |
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| 37 | r8 = #ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE) |
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| 38 | |
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| 39 | // The patched sled puts the function type |
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| 40 | // into r6. Move it into r0 to pass it to |
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| 41 | // the patched function. |
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| 42 | { r0 = r6 |
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| 43 | r1 = \entry_type |
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| 44 | p0 = !cmp.eq(r8, #0) |
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| 45 | if (p0) callr r8 } |
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| 46 | .endm |
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| 47 | |
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| 48 | .text |
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| 49 | .globl ASM_SYMBOL(__xray_FunctionEntry) |
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| 50 | ASM_HIDDEN(__xray_FunctionEntry) |
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| 51 | ASM_TYPE_FUNCTION(__xray_FunctionEntry) |
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| 52 | # LLVM-MCA-BEGIN __xray_FunctionEntry |
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| 53 | ASM_SYMBOL(__xray_FunctionEntry): |
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| 54 | CFI_STARTPROC |
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| 55 | SAVE_REGISTERS |
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| 56 | |
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| 57 | CALL_PATCHED_FUNC #0 // XRayEntryType::ENTRY |
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| 58 | .Ltmp0: |
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| 59 | RESTORE_REGISTERS |
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| 60 | // return |
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| 61 | # LLVM-MCA-END |
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| 62 | ASM_SIZE(__xray_FunctionEntry) |
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| 63 | CFI_ENDPROC |
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| 64 | |
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| 65 | |
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| 66 | .globl ASM_SYMBOL(__xray_FunctionExit) |
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| 67 | ASM_HIDDEN(__xray_FunctionExit) |
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| 68 | ASM_TYPE_FUNCTION(__xray_FunctionExit) |
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| 69 | # LLVM-MCA-BEGIN __xray_FunctionExit |
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| 70 | ASM_SYMBOL(__xray_FunctionExit): |
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| 71 | CFI_STARTPROC |
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| 72 | SAVE_REGISTERS |
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| 73 | |
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| 74 | CALL_PATCHED_FUNC #1 // XRayEntryType::EXIT |
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| 75 | .Ltmp1: |
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| 76 | RESTORE_REGISTERS |
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| 77 | // return |
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| 78 | jumpr r31 |
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| 79 | # LLVM-MCA-END |
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| 80 | ASM_SIZE(__xray_FunctionExit) |
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| 81 | CFI_ENDPROC |
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| 82 | |
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| 83 | |
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| 84 | .globl ASM_SYMBOL(__xray_FunctionTailExit) |
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| 85 | ASM_HIDDEN(__xray_FunctionTailExit) |
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| 86 | ASM_TYPE_FUNCTION(__xray_FunctionTailExit) |
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| 87 | # LLVM-MCA-BEGIN __xray_FunctionTailExit |
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| 88 | ASM_SYMBOL(__xray_FunctionTailExit): |
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| 89 | CFI_STARTPROC |
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| 90 | SAVE_REGISTERS |
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| 91 | |
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| 92 | CALL_PATCHED_FUNC #2 // XRayEntryType::TAIL |
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| 93 | .Ltmp2: |
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| 94 | RESTORE_REGISTERS |
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| 95 | // return |
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| 96 | jumpr r31 |
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| 97 | # LLVM-MCA-END |
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| 98 | ASM_SIZE(__xray_FunctionTailExit) |
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| 99 | CFI_ENDPROC |
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| 100 | |
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