arm64 下，hook 之后报 `SIGILL`/`ILL_ILLOPC`

[yujincheng08]

libart.zip

hook 的是 0x3C87C8 的 _ZN3art15instrumentation15Instrumentation21InitializeMethodsCodeEPNS_9ArtMethodEPKv。hook 完之后，0x3C87D4 报 SIGILL/ILL_ILLOPC

hook 前：

0x00000000003c87c8:  FD 7B BD A9    stp x29, x30, [sp, #-0x30]!
0x00000000003c87cc:  F5 0B 00 F9    str x21, [sp, #0x10]
0x00000000003c87d0:  FD 03 00 91    mov x29, sp
0x00000000003c87d4:  F4 4F 02 A9    stp x20, x19, [sp, #0x20]
0x00000000003c87d8:  08 0C 40 B9    ldr w8, [x0, #0xc]

hook 后：

0x00000000003c87c8:  51 1B F6 B0    adrp x17, #0xffffffffec731000
0x00000000003c87cc:  31 42 3B 91    add  x17, x17, #0xed0
0x00000000003c87d0:  20 02 1F D6    br   x17
0x00000000003c87d4:  F4 4F 02 A9    stp  x20, x19, [sp, #0x20]
0x00000000003c87d8:  08 0C 40 B9    ldr  w8, [x0, #0xc]

[yujincheng08]

crash 前函数内容：

0x0000000000000000:  50 00 00 58    ldr   x16, #8
0x0000000000000004:  00 02 1F D6    br    x16
0x0000000000000008:  EC 28 C4 79    ldrsh w12, [x7, #0x214]

是 hook 之后又被人 hook 了。