1#include "../builtins/assembly.h"
2#include "../sanitizer_common/sanitizer_asm.h"
3
4.macro SAVE_REGISTERS
5 stp x1, x2, [sp, #-16]!
6 stp x3, x4, [sp, #-16]!
7 stp x5, x6, [sp, #-16]!
8 stp x7, x30, [sp, #-16]!
9 stp q0, q1, [sp, #-32]!
10 stp q2, q3, [sp, #-32]!
11 stp q4, q5, [sp, #-32]!
12 stp q6, q7, [sp, #-32]!
13 // x8 is the indirect result register and needs to be preserved for the body of the function to use.
14 stp x8, x0, [sp, #-16]!
15.endm
16
17.macro RESTORE_REGISTERS
18 ldp x8, x0, [sp], #16
19 ldp q6, q7, [sp], #32
20 ldp q4, q5, [sp], #32
21 ldp q2, q3, [sp], #32
22 ldp q0, q1, [sp], #32
23 ldp x7, x30, [sp], #16
24 ldp x5, x6, [sp], #16
25 ldp x3, x4, [sp], #16
26 ldp x1, x2, [sp], #16
27.endm
28
29.text
30.p2align 2
31.global ASM_SYMBOL(__xray_FunctionEntry)
32ASM_HIDDEN(__xray_FunctionEntry)
33ASM_TYPE_FUNCTION(__xray_FunctionEntry)
34ASM_SYMBOL(__xray_FunctionEntry):
35 /* Move the return address beyond the end of sled data. The 12 bytes of
36 data are inserted in the code of the runtime patch, between the call
37 instruction and the instruction returned into. The data contains 32
38 bits of instrumented function ID and 64 bits of the address of
39 the current trampoline. */
40 add x30, x30, #12
41 // Push the registers which may be modified by the handler function.
42 SAVE_REGISTERS
43
44 // Load the handler function pointer.
45 adrp x2, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
46 ldr x2, [x2, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
47 cbz x2, 1f
48 // Set w0 to the function ID (w17). Set x1 to XRayEntryType::ENTRY = 0.
49 mov w0, w17
50 mov x1, #0
51 // Call the handler with 2 parameters.
52 blr x2
531:
54 RESTORE_REGISTERS
55 ret
56ASM_SIZE(__xray_FunctionEntry)
57
58.p2align 2
59.global ASM_SYMBOL(__xray_FunctionExit)
60ASM_HIDDEN(__xray_FunctionExit)
61ASM_TYPE_FUNCTION(__xray_FunctionExit)
62ASM_SYMBOL(__xray_FunctionExit):
63 /* Move the return address beyond the end of sled data. The 12 bytes of
64 data are inserted in the code of the runtime patch, between the call
65 instruction and the instruction returned into. The data contains 32
66 bits of instrumented function ID and 64 bits of the address of
67 the current trampoline. */
68 add x30, x30, #12
69 SAVE_REGISTERS
70
71 // Load the handler function pointer into x2.
72 adrp x2, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
73 ldr x2, [x2, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
74 cbz x2, 1f
75 // Set w0 to the function ID (w17). Set x1 to XRayEntryType::EXIT = 1.
76 mov w0, w17
77 mov x1, #1
78 // Call the handler with 2 parameters.
79 blr x2
801:
81 RESTORE_REGISTERS
82 ret
83ASM_SIZE(__xray_FunctionExit)
84
85.p2align 2
86.global ASM_SYMBOL(__xray_FunctionTailExit)
87ASM_HIDDEN(__xray_FunctionTailExit)
88ASM_TYPE_FUNCTION(__xray_FunctionTailExit)
89ASM_SYMBOL(__xray_FunctionTailExit):
90 /* Move the return address beyond the end of sled data. The 12 bytes of
91 data are inserted in the code of the runtime patch, between the call
92 instruction and the instruction returned into. The data contains 32
93 bits of instrumented function ID and 64 bits of the address of
94 the current trampoline. */
95 add x30, x30, #12
96 // Save the registers which may be modified by the handler function.
97 SAVE_REGISTERS
98 // Load the handler function pointer into x2.
99 adrp x2, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
100 ldr x2, [x2, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
101 cbz x2, 1f
102 // Set w0 to the function ID (w17). Set x1 to XRayEntryType::TAIL = 2.
103 mov w0, w17
104 mov x1, #2
105 // Call the handler with 2 parameters.
106 blr x2
1071:
108 RESTORE_REGISTERS
109 ret
110ASM_SIZE(__xray_FunctionTailExit)
111
112.p2align 2
113.global ASM_SYMBOL(__xray_ArgLoggerEntry)
114ASM_HIDDEN(__xray_ArgLoggerEntry)
115ASM_TYPE_FUNCTION(__xray_ArgLoggerEntry)
116ASM_SYMBOL(__xray_ArgLoggerEntry):
117 add x30, x30, #12
118 // Push the registers which may be modified by the handler function.
119 SAVE_REGISTERS
120
121 adrp x8, ASM_SYMBOL(_ZN6__xray13XRayArgLoggerE)
122 ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray13XRayArgLoggerE)]
123 cbnz x8, 2f
124
125 // Load the handler function pointer.
126 adrp x8, ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)
127 ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)]
128 cbz x8, 1f
129
1302:
131 mov x2, x0
132 mov x1, #3 // XRayEntryType::LOG_ARGS_ENTRY
133 mov w0, w17
134 blr x8
135
1361:
137 RESTORE_REGISTERS
138 ret
139ASM_SIZE(__xray_ArgLoggerEntry)
140
141// __xray_*Event have default visibility so that they can be referenced by user
142// DSOs that do not link against the runtime.
143.global ASM_SYMBOL(__xray_CustomEvent)
144ASM_TYPE_FUNCTION(__xray_CustomEvent)
145ASM_SYMBOL(__xray_CustomEvent):
146 SAVE_REGISTERS
147 adrp x8, ASM_SYMBOL(_ZN6__xray22XRayPatchedCustomEventE)
148 ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray22XRayPatchedCustomEventE)]
149 cbz x8, 1f
150 blr x8
1511:
152 RESTORE_REGISTERS
153 ret
154ASM_SIZE(__xray_CustomEvent)
155
156.global ASM_SYMBOL(__xray_TypedEvent)
157ASM_TYPE_FUNCTION(__xray_TypedEvent)
158ASM_SYMBOL(__xray_TypedEvent):
159 SAVE_REGISTERS
160 adrp x8, ASM_SYMBOL(_ZN6__xray21XRayPatchedTypedEventE)
161 ldr x8, [x8, #:lo12:ASM_SYMBOL(_ZN6__xray21XRayPatchedTypedEventE)]
162 cbz x8, 1f
163 blr x8
1641:
165 RESTORE_REGISTERS
166 ret
167ASM_SIZE(__xray_TypedEvent)
168
169NO_EXEC_STACK_DIRECTIVE
170

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source code of compiler-rt/lib/xray/xray_trampoline_AArch64.S