1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
//===-- xray_trampoline_hexagon.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 hexagon-specific assembler for the trampolines.
//
//===----------------------------------------------------------------------===//
#include "../builtins/assembly.h"
#include "../sanitizer_common/sanitizer_asm.h"
.macro SAVE_REGISTERS
memw(sp+#0)=r0
memw(sp+#4)=r1
memw(sp+#8)=r2
memw(sp+#12)=r3
memw(sp+#16)=r4
.endm
.macro RESTORE_REGISTERS
r0=memw(sp+#0)
r1=memw(sp+#4)
r2=memw(sp+#8)
r3=memw(sp+#12)
r4=memw(sp+#16)
.endm
.macro CALL_PATCHED_FUNC entry_type
// if (xray::XRayPatchedFunctionE != NULL)
// xray::XRayPatchedFunctionE(FuncType);
r8 = #ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
// The patched sled puts the function type
// into r6. Move it into r0 to pass it to
// the patched function.
{ r0 = r6
r1 = \entry_type
p0 = !cmp.eq(r8, #0)
if (p0) callr r8 }
.endm
.text
.globl ASM_SYMBOL(__xray_FunctionEntry)
ASM_HIDDEN(__xray_FunctionEntry)
ASM_TYPE_FUNCTION(__xray_FunctionEntry)
# LLVM-MCA-BEGIN __xray_FunctionEntry
ASM_SYMBOL(__xray_FunctionEntry):
CFI_STARTPROC
SAVE_REGISTERS
CALL_PATCHED_FUNC #0 // XRayEntryType::ENTRY
.Ltmp0:
RESTORE_REGISTERS
// return
# LLVM-MCA-END
ASM_SIZE(__xray_FunctionEntry)
CFI_ENDPROC
.globl ASM_SYMBOL(__xray_FunctionExit)
ASM_HIDDEN(__xray_FunctionExit)
ASM_TYPE_FUNCTION(__xray_FunctionExit)
# LLVM-MCA-BEGIN __xray_FunctionExit
ASM_SYMBOL(__xray_FunctionExit):
CFI_STARTPROC
SAVE_REGISTERS
CALL_PATCHED_FUNC #1 // XRayEntryType::EXIT
.Ltmp1:
RESTORE_REGISTERS
// return
jumpr r31
# LLVM-MCA-END
ASM_SIZE(__xray_FunctionExit)
CFI_ENDPROC
.globl ASM_SYMBOL(__xray_FunctionTailExit)
ASM_HIDDEN(__xray_FunctionTailExit)
ASM_TYPE_FUNCTION(__xray_FunctionTailExit)
# LLVM-MCA-BEGIN __xray_FunctionTailExit
ASM_SYMBOL(__xray_FunctionTailExit):
CFI_STARTPROC
SAVE_REGISTERS
CALL_PATCHED_FUNC #2 // XRayEntryType::TAIL
.Ltmp2:
RESTORE_REGISTERS
// return
jumpr r31
# LLVM-MCA-END
ASM_SIZE(__xray_FunctionTailExit)
CFI_ENDPROC
|
