将代码修补到MASM编译的可执行文件中

.386
.model flat, stdcall
option casemap:none

.data
szName db "MASM", 0

.code
start:
mov eax, DWORD PTR [szName]
ret
end start

CPU Disasm
Address   Hex dump          Command                                  Comments
00401004      CC            INT3
00401005  /.  E9 06000000   JMP 00401010
0040100A  |   CC            INT3
0040100B  |   CC            INT3
0040100C  |   CC            INT3
0040100D  |   CC            INT3
0040100E  |   CC            INT3
0040100F  |   CC            INT3
00401010  |>  A1 00404000   MOV EAX,DWORD PTR DS:[404000]            ; ASCII "MASM"
00401015  .  C3            RETN
00401016      A1            DB A1