Extracting machine code from an exe

[kdeveloper]

Hi,

We do realize that this isn't the right platform to post questions related to Windows environment.

But as of now we are not 'technical' enough to work with GCC's inline assembly as it uses AT&T's style of coding for 32/64 bit.

We are working on TCC for a 16-bit system.

The question is:

How do we extract the machine code from an exe file?
We have the structure of exe file but have difficulty in identifying where the code and the dependent data resides.

[gerard4143]

I'm not really sure what your looking for but maybe you could try objdump...Hope this helps...Gerard4143

i.e objdump -D executablefilename

[rcgreen]

If you're working in DOS, there is debug

D:\prog>debug hello.exe
-u
07E8:0000 E97F15        JMP     1582
07E8:0003 55            PUSH    BP
07E8:0004 8BEC          MOV     BP,SP
07E8:0006 B80600        MOV     AX,0006
07E8:0009 50            PUSH    AX
07E8:000A E80700        CALL    0014
07E8:000D 8BE5          MOV     SP,BP
07E8:000F B80000        MOV     AX,0000
07E8:0012 5D            POP     BP
07E8:0013 C3            RET
07E8:0014 55            PUSH    BP
07E8:0015 8BEC          MOV     BP,SP
07E8:0017 81EC0201      SUB     SP,0102
07E8:001B 8D4604        LEA     AX,[BP+04]
07E8:001E 50            PUSH    AX
07E8:001F 8D86FEFE      LEA     AX,[BP+FEFE]

[kdeveloper]

Hi,

We want to extract the machine code from the executable because we have to boot the system from it.

The boot-loader isn't programmed to be intelligent enough to understand the exe format. It simply fetches a given number of sectors from the disk and loads it to a predetermined address location in memory and passes control to it.

So it suits our purpose to extract the desired machine code from the corresponding exe file.

Any suggestions in regard to this would be great.

Thank you.