|Subject:||Re: [Qemu-devel] dump-guest-memory command?|
|Date:||Fri, 16 May 2014 16:40:23 +0800|
Hi Jun,On Fri, 16 May 2014 14:24:16 +0800
Jun Koi <address@hidden> wrote:
> Anybody please help me on this dump-guest-memory command? How does the
> virtual memory map to the dumped file?
> For example, if x86 register RIP points to 0x12345, how does that map to
> the dump file? Meaning how can I find where this address 0x12345 in the
> I tried, but couldnt find much documentation on this command.
> Thank you a lot,
The dump file is in ELF format and data is written in ELF notes.
Use readelf -a on the file and you'll get something like the
following at the end of the output:
Notes at offset 0x000001c8 with length 0x00000328:
Owner Data size Description
CORE 0x00000150 NT_PRSTATUS (prstatus structure)
QEMU 0x000001b0 Unknown note type: (0x00000000)
The registers sit in the NT_PRSTATUS note (hence somewhere offset
0x000001c8 and 0x000001c8+0x00000150+0x14 (the latter is the ELF note
header size). Be aware that intel is little endian: if RIP is 0x00012345,
you need to look for '45 23 01 00' in the file.
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