From: "Develop.ReactOS" <develop.reactos@gmail.com>
To: "gdb" <gdb@sourceware.org>
Subject: Need help debuging i386 in real mode.
Date: Sun, 25 Mar 2007 06:35:00 -0000 [thread overview]
Message-ID: <200703251435091123125@gmail.com> (raw)
Hello:
I am trying to debug i386 in real mode. How to disassemble 16-bit code?
gdb appears to always assume a 32-bit segment.Is there a way to coerce gdb into 16-bit disassembly mode? Is there some other tool or cmd I could use?
I need 16-bit disassembly instruction,but gdb's output is wrong:
(gdb) x /10i $eip+$cs*16
0xffff0: ljmp 0x3131,0xf000e05b
0xffff7: das
0xffff8: xor BYTE PTR [ecx],dh
0xffffa: das
0xffffb: xor BYTE PTR [esi],dh
0xffffd: add ah,bh
0xfffff: test DWORD PTR [eax],0x0
0x100005: add BYTE PTR [eax],al
0x100007: add BYTE PTR [eax],al
0x100009: add BYTE PTR [eax],al
Best regards!
Develop.ReactOS
2007-03-25
next reply other threads:[~2007-03-25 6:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-25 6:35 Develop.ReactOS [this message]
2007-03-26 5:55 ` David Daney
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