1 ; Copyright (c) 2009 The Chromium Authors. All rights reserved. 2 ; Use of this source code is governed by a BSD-style license that can be 3 ; found in the LICENSE file. 4 5 ; This file is just a convenient place for experimenting with x86 encodings. 6 7 BITS 32 8 9 ; sldt to detect which processor we are running on. 10 sldt eax 11 sidt [esp] 12 sidt [esp+2] 13 14 lea eax, [fs:0] 15 16 mov eax, [fs:0x18] 17 18 mov ebx, 0x1234567 19 mov eax, 0x1234567 20 21 rdtsc 22 23 push eax 24 pop eax 25 26 mov eax, [ecx] 27 mov eax, [esp+4] 28 mov ebx, [esp+4] 29 30 lock xadd [eax], eax 31 lock xadd [ecx], ecx 32 lock xadd [ecx], eax 33 34 jmp eax 35 jmp edx 36 37 lodsd 38 39 rep stosb 40 41 rep movsb 42 43 mov eax, ebx 44 mov edx, edx 45 46 mov eax, eax 47 48 stosd 49 50 add eax, eax 51 add edi, ecx 52 53 and eax, 0x0000ffff 54 and ecx, 0x0000ffff 55 and edx, 0x0000ffff 56 57 add edi, 0x12345 58 add eax, 0x12345 59 add ecx, 0x12345 60 61 push 0x12 62 push BYTE 0x12 63 64 mov eax, [ebp+8] 65 66 mov eax, 0x1234 67 mov [fs:0], eax 68 69 call 0x1234 70 71 call eax 72 call ecx 73 74 add ebx, BYTE 3 75 or ecx, 0xffff 76 or eax, 0xffff 77 78 mov eax, [esp+24] 79 80 movsd 81 movsb 82 83 jmp blah 84 blah: 85 jmp blah 86 87 cmp eax, 0x1234567 88 cmp ecx, 0x1234567 89 je NEAR blah2 90 jo NEAR blah2 91 blah2: 92 93 add esp, 12 94 add esp, BYTE 12 95 sub esp, BYTE 12 96 97 cmp eax, 12 98 cmp ecx, BYTE 12 99 100 cmp WORD [esp+6], 0x6666 101 102 push DWORD [edi-4] 103 push DWORD [edi-8] 104 push DWORD [edi-12] 105 push DWORD [edi-16] 106 push DWORD [edi-20] 107 108 x: 109 loop x 110 111 mov edx, [fs:0x4] 112 113 cmp ecx, ecx 114 cmp ecx, ebx 115 cmp ebx, ebx 116 117 mov eax,[dword fs:0x24] 118 mov eax,[fs:0x24] 119 120 mov ecx,[dword fs:0x24] 121 mov ecx,[fs:0x24] 122 123 mov eax, [ebx+12] 124 mov ebx, [ebx+12] 125 126 cmovo eax, eax 127 128 mov eax, eax 129 130 xchg eax, ebx 131 xchg ebx, ecx 132 xchg ebx, [esp+4] 133
