At 04/18/2012 08:49 PM, Wen Congyang Wrote:
Hi, all
'virsh dump' can not work when host pci device is used by guest. We have
discussed this issue here:
http://lists.nongnu.org/archive/html/qemu-devel/2011-10/msg00736.html
The last version is here:
http://lists.nongnu.org/archive/html/qemu-devel/2012-04/msg02440.html
We have determined to introduce a new command dump-guest-memory to dump
guest's memory. The core file's format is elf32 or elf64.
Note:
1. The guest should be x86 or x86_64. The other arch is not supported now.
2. If you use old gdb, gdb may crash. I use gdb-7.3.1, and it does not crash.
3. If the OS is in the second kernel, gdb may not work well, and crash can
work by specifying '--machdep phys_addr=xxx' in the command line. The
reason is that the second kernel will update the page table, and we can
not get the page table for the first kernel.
4. The cpu's state is stored in QEMU note. You neet to modify crash to use
it to calculate phys_base.
5. If the guest OS is 32 bit and the memory size is larger than 4G, the vmcore
is elf64 format. You should use the gdb which is built with
--enable-64-bit-bfd.
Changes from v12 to v13:
1. Support the fd that is is associated with a pipe, socket, or FIFO
Hi, Luiz,
The master logic is not changed. I only update 4 patches:
patch7 and patch8: remove the offset argument from the API
patch11: a new patch, with this patch, I can get the note's size, so lseek()
is unnecessary.
patch12: remove the offset argument from the some static functions
split some functions
add a function to write elf load
adjust writing order to avoid using lseek()
I have test this patchset, and it works fine for me.
Changes from v11 to v12:
1. rebase and resend
Changes from v10 to v11:
1. addressed Luiz's and Hatayam's comment
2. fix a bug about filtering feature
Changes from v9 to v10:
1. fix some bug
2. addressed Luiz's and Hatayam's comment
3. remove cancel and query command
Changes from v8 to v9:
1. remove async support(it will be reimplemented after QAPI async commands
support
is finished)
2. fix some typo error
Changes from v7 to v8:
1. addressed Hatayama's comments
Changes from v6 to v7:
1. addressed Jan's comments
2. fix some bugs
3. store cpu's state into the vmcore
Changes from v5 to v6:
1. allow user to dump a fraction of the memory
2. fix some bugs
Changes from v4 to v5:
1. convert the new command dump to QAPI
Changes from v3 to v4:
1. support it to run asynchronously
2. add API to cancel dumping and query dumping progress
3. add API to control dumping speed
4. auto cancel dumping when the user resumes vm, and the status is failed.
Changes from v2 to v3:
1. address Jan Kiszka's comment
Changes from v1 to v2:
1. fix virt addr in the vmcore.
Wen Congyang (12):
Add API to create memory mapping list
Add API to check whether a physical address is I/O address
implement cpu_get_memory_mapping()
Add API to check whether paging mode is enabled
Add API to get memory mapping
Add API to get memory mapping without do paging
target-i386: Add API to write elf notes to core file
target-i386: Add API to write cpu status to core file
target-i386: add API to get dump info
target-i386: Add API to get note's size
make gdb_id() generally avialable and rename it to cpu_index()
introduce a new monitor command 'dump-guest-memory' to dump guest's
memory
Makefile.target | 3 +
configure | 8 +
cpu-all.h | 70 +++
cpu-common.h | 2 +
dump.c | 872 +++++++++++++++++++++++++++++++++++++
dump.h | 23 +
elf.h | 5 +
exec.c | 9 +
gdbstub.c | 19 +-
gdbstub.h | 9 +
hmp-commands.hx | 28 ++
hmp.c | 22 +
hmp.h | 1 +
memory_mapping.c | 249 +++++++++++
memory_mapping.h | 68 +++
qapi-schema.json | 33 ++
qmp-commands.hx | 38 ++
target-i386/arch_dump.c | 449 +++++++++++++++++++
target-i386/arch_memory_mapping.c | 271 ++++++++++++
19 files changed, 2165 insertions(+), 14 deletions(-)
create mode 100644 dump.c
create mode 100644 dump.h
create mode 100644 memory_mapping.c
create mode 100644 memory_mapping.h
create mode 100644 target-i386/arch_dump.c
create mode 100644 target-i386/arch_memory_mapping.c