On Fri, 16 May 2014 14:24:16 +0800 Jun Koi <junkoi2...@gmail.com> wrote: > Hi, > > 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 > dump? > > I tried, but couldnt find much documentation on this command. > > Thank you a lot, > Jun
Hi Jun,
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.
The attached script may help to display the dump file content.
Cheers.
--
Gregory Kurz kurzg...@fr.ibm.com
gk...@linux.vnet.ibm.com
Software Engineer @ IBM/Meiosys http://www.ibm.com
Tel +33 (0)562 165 496
"Anarchy is about taking complete responsibility for yourself."
Alan Moore.
elfnote
Description: Binary data
