g++ -S したコードは gas 形式というものになっていて、非常に読みにくいので、逆アセンブルをしてみます。ここでは、逆アセンブルの方法について知りました。
void test()
{
}
void test(int a, int b)
{
}
int test(int c)
{
}
int main() {
return 0;
}
g++ -c 1.cpp ndisasm -u 1.o
00000000 4C dec esp 00000001 0103 add [ebx],eax 00000003 0000 add [eax],al 00000005 0000 add [eax],al 00000007 00E0 add al,ah 00000009 0000 add [eax],al 0000000B 000C00 add [eax+eax],cl 0000000E 0000 add [eax],al 00000010 0000 add [eax],al 00000012 0401 add al,0x1 00000014 2E7465 cs jz 0x7c 00000017 7874 js 0x8d 00000019 0000 add [eax],al 0000001B 0000 add [eax],al 0000001D 0000 add [eax],al 0000001F 0000 add [eax],al 00000021 0000 add [eax],al 00000023 004000 add [eax+0x0],al 00000026 0000 add [eax],al 00000028 8C00 mov [eax],es 0000002A 0000 add [eax],al 0000002C CC int3 0000002D 0000 add [eax],al 0000002F 0000 add [eax],al 00000031 0000 add [eax],al 00000033 0002 add [edx],al 00000035 0000 add [eax],al 00000037 0020 add [eax],ah 00000039 0000 add [eax],al 0000003B 60 pusha 0000003C 2E6461 fs popa 0000003F 7461 jz 0xa2 00000041 0000 add [eax],al 00000043 0000 add [eax],al 00000045 0000 add [eax],al 00000047 0000 add [eax],al 00000049 0000 add [eax],al 0000004B 0000 add [eax],al 0000004D 0000 add [eax],al 0000004F 0000 add [eax],al 00000051 0000 add [eax],al 00000053 0000 add [eax],al 00000055 0000 add [eax],al 00000057 0000 add [eax],al 00000059 0000 add [eax],al 0000005B 0000 add [eax],al 0000005D 0000 add [eax],al 0000005F 004000 add [eax+0x0],al 00000062 00C0 add al,al 00000064 2E627373 bound esi,[cs:ebx+0x73] 00000068 0000 add [eax],al 0000006A 0000 add [eax],al 0000006C 0000 add [eax],al 0000006E 0000 add [eax],al 00000070 0000 add [eax],al 00000072 0000 add [eax],al 00000074 0000 add [eax],al 00000076 0000 add [eax],al 00000078 0000 add [eax],al 0000007A 0000 add [eax],al 0000007C 0000 add [eax],al 0000007E 0000 add [eax],al 00000080 0000 add [eax],al 00000082 0000 add [eax],al 00000084 0000 add [eax],al 00000086 0000 add [eax],al 00000088 800000 add byte [eax],0x0 0000008B C05589E5 rcl byte [ebp-0x77],0xe5 0000008F 83EC08 sub esp,byte +0x8 00000092 83E4F0 and esp,byte -0x10 00000095 B800000000 mov eax,0x0 0000009A 83C00F add eax,byte +0xf 0000009D 83C00F add eax,byte +0xf 000000A0 C1E804 shr eax,0x4 000000A3 C1E004 shl eax,0x4 000000A6 8945F8 mov [ebp-0x8],eax 000000A9 8B45F8 mov eax,[ebp-0x8] 000000AC E800000000 call 0xb1 000000B1 E800000000 call 0xb6 000000B6 C745FC01000000 mov dword [ebp-0x4],0x1 000000BD B800000000 mov eax,0x0 000000C2 C9 leave 000000C3 C3 ret 000000C4 90 nop 000000C5 90 nop 000000C6 90 nop 000000C7 90 nop 000000C8 90 nop 000000C9 90 nop 000000CA 90 nop 000000CB 90 nop 000000CC 2100 and [eax],eax 000000CE 0000 add [eax],al 000000D0 0B00 or eax,[eax] 000000D2 0000 add [eax],al 000000D4 1400 adc al,0x0 000000D6 260000 add [es:eax],al 000000D9 0009 add [ecx],cl 000000DB 0000 add [eax],al 000000DD 001400 add [eax+eax],dl 000000E0 2E66696C65000000 imul bp,[cs:ebp+0x0],word 0x0 000000E8 0000 add [eax],al 000000EA 0000 add [eax],al 000000EC FE db 0xFE 000000ED FF00 inc dword [eax] 000000EF 006701 add [edi+0x1],ah 000000F2 302E xor [esi],ch 000000F4 637070 arpl [eax+0x70],si 000000F7 0000 add [eax],al 000000F9 0000 add [eax],al 000000FB 0000 add [eax],al 000000FD 0000 add [eax],al 000000FF 0000 add [eax],al 00000101 0000 add [eax],al 00000103 005F6D add [edi+0x6d],bl 00000106 61 popa 00000107 696E0000000000 imul ebp,[esi+0x0],dword 0x0 0000010E 0000 add [eax],al 00000110 0100 add [eax],eax 00000112 2000 and [eax],al 00000114 0200 add al,[eax] 00000116 2E7465 cs jz 0x17e 00000119 7874 js 0x18f 0000011B 0000 add [eax],al 0000011D 0000 add [eax],al 0000011F 0000 add [eax],al 00000121 0001 add [ecx],al 00000123 0000 add [eax],al 00000125 0003 add [ebx],al 00000127 0138 add [eax],edi 00000129 0000 add [eax],al 0000012B 0002 add [edx],al 0000012D 0000 add [eax],al 0000012F 0000 add [eax],al 00000131 0000 add [eax],al 00000133 0000 add [eax],al 00000135 0000 add [eax],al 00000137 0000 add [eax],al 00000139 002E add [esi],ch 0000013B 6461 fs popa 0000013D 7461 jz 0x1a0 0000013F 0000 add [eax],al 00000141 0000 add [eax],al 00000143 0000 add [eax],al 00000145 0002 add [edx],al 00000147 0000 add [eax],al 00000149 0003 add [ebx],al 0000014B 0100 add [eax],eax 0000014D 0000 add [eax],al 0000014F 0000 add [eax],al 00000151 0000 add [eax],al 00000153 0000 add [eax],al 00000155 0000 add [eax],al 00000157 0000 add [eax],al 00000159 0000 add [eax],al 0000015B 0000 add [eax],al 0000015D 002E add [esi],ch 0000015F 627373 bound esi,[ebx+0x73] 00000162 0000 add [eax],al 00000164 0000 add [eax],al 00000166 0000 add [eax],al 00000168 0000 add [eax],al 0000016A 0300 add eax,[eax] 0000016C 0000 add [eax],al 0000016E 0301 add eax,[ecx] 00000170 0000 add [eax],al 00000172 0000 add [eax],al 00000174 0000 add [eax],al 00000176 0000 add [eax],al 00000178 0000 add [eax],al 0000017A 0000 add [eax],al 0000017C 0000 add [eax],al 0000017E 0000 add [eax],al 00000180 0000 add [eax],al 00000182 5F pop edi 00000183 5F pop edi 00000184 5F pop edi 00000185 6D insd 00000186 61 popa 00000187 696E0000000000 imul ebp,[esi+0x0],dword 0x0 0000018E 0000 add [eax],al 00000190 2000 and [eax],al 00000192 0201 add al,[ecx] 00000194 0000 add [eax],al 00000196 0000 add [eax],al 00000198 0000 add [eax],al 0000019A 0000 add [eax],al 0000019C 0000 add [eax],al 0000019E 0000 add [eax],al 000001A0 0000 add [eax],al 000001A2 0000 add [eax],al 000001A4 0000 add [eax],al 000001A6 5F pop edi 000001A7 5F pop edi 000001A8 61 popa 000001A9 6C insb 000001AA 6C insb 000001AB 6F outsd 000001AC 636100 arpl [ecx+0x0],sp 000001AF 0000 add [eax],al 000001B1 0000 add [eax],al 000001B3 0000 add [eax],al 000001B5 0002 add [edx],al 000001B7 000400 add [eax+eax],al 000001BA 0000 add [eax],al
少しは見やすくなりました。
