From: "Eduardo Felipe" <edusaper@gmail.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: Detecting an assembly instruction in QEMU
Date: Fri, 27 Apr 2007 12:16:29 +0200 [thread overview]
Message-ID: <83a4d4ca0704270316k1dbd6681te06eda656568659d@mail.gmail.com> (raw)
In-Reply-To: <d5f3bd2b0704261426v38fb9945laac0070700748304@mail.gmail.com>
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>
>
> I think I could not explain my question regarding "addl %ebx, (%eax)".
> What I wanted to ask was that this instruction also accesses the memory and
> I also need to intercept it within a transaction. Incase of "addl %ebx,
> (%eax)", Are the functions under "/* CPU memory access without any memory or
> io remapping */" called in case of this instruction.
Yes. Just look how the instruction is translated into opcodes and you'll see
how it works. You can use the -d switch for this.
Secondly, there is a function in "exec.c" called "cpu_physical_memory_rw".
> Is it easier to hack into this fuction to intercept the memory references.
That function is used by emulated hardware devices to interact with memory (
e.g. DMA to write and read memory chunks). Translated guest code does not
use it.
Regards,
Eduardo
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next prev parent reply other threads:[~2007-04-27 10:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-04 4:57 [Qemu-devel] Detecting an assembly instruction in QEMU Atif Hashmi
2007-04-05 17:37 ` [Qemu-devel] " Atif Hashmi
2007-04-06 12:15 ` Eduardo Felipe
2007-04-07 21:06 ` Atif Hashmi
2007-04-08 14:13 ` Eduardo Felipe
2007-04-08 21:38 ` Atif Hashmi
2007-04-08 22:14 ` Eduardo Felipe
2007-04-17 0:17 ` Atif Hashmi
2007-04-17 0:22 ` Atif Hashmi
2007-04-17 9:49 ` Eduardo Felipe
2007-04-17 20:33 ` Atif Hashmi
2007-04-22 13:09 ` Eduardo Felipe
2007-04-24 7:30 ` Atif Hashmi
2007-04-24 9:34 ` Eduardo Felipe
2007-04-25 16:21 ` Atif Hashmi
2007-04-25 16:50 ` Atif Hashmi
2007-04-26 14:03 ` Eduardo Felipe
2007-04-26 21:26 ` Atif Hashmi
2007-04-27 10:16 ` Eduardo Felipe [this message]
2007-05-01 20:28 ` Atif Hashmi
2007-04-11 16:05 ` Thiemo Seufer
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