At 03/07/2012 11:27 PM, HATAYAMA Daisuke Wrote:
> From: Wen Congyang <we...@cn.fujitsu.com>
> Subject: [RFC][PATCH 05/16 v8] Add API to get memory mapping
> Date: Fri, 02 Mar 2012 18:18:23 +0800
>
>> Add API to get all virtual address and physical address mapping.
>> If there is no virtual address for some physical address, the virtual
>> address is 0.
>>
>> Signed-off-by: Wen Congyang <we...@cn.fujitsu.com>
>> ---
>> memory_mapping.c | 88
>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++
>> memory_mapping.h | 8 +++++
>> 2 files changed, 96 insertions(+), 0 deletions(-)
>>
>> diff --git a/memory_mapping.c b/memory_mapping.c
>> index 718f271..f74c5d0 100644
>> --- a/memory_mapping.c
>> +++ b/memory_mapping.c
>> @@ -164,3 +164,91 @@ void memory_mapping_list_init(MemoryMappingList *list)
>> list->last_mapping = NULL;
>> QTAILQ_INIT(&list->head);
>> }
>> +
>> +int qemu_get_guest_memory_mapping(MemoryMappingList *list)
>> +{
>> + CPUState *env;
>> + MemoryMapping *memory_mapping;
>> + RAMBlock *block;
>> + ram_addr_t offset, length, m_length;
>> + target_phys_addr_t m_phys_addr;
>> + int ret;
>> + bool paging_mode;
>> +
>> +#if defined(CONFIG_HAVE_GET_MEMORY_MAPPING)
>> + paging_mode = cpu_paging_enabled(first_cpu);
>> + if (paging_mode) {
>> + for (env = first_cpu; env != NULL; env = env->next_cpu) {
>> + ret = cpu_get_memory_mapping(list, env);
>> + if (ret < 0) {
>> + return -1;
>> + }
>> + }
>> + }
>> +#else
>> + return -2;
>> +#endif
>> +
>> + /*
>> + * some memory may be not in the memory mapping's list:
>> + * 1. the guest doesn't use paging
>> + * 2. the guest is in 2nd kernel, and the memory used by 1st kernel is
>> not
>> + * in paging table
>> + * add them into memory mapping's list
>> + */
>> + QLIST_FOREACH(block, &ram_list.blocks, next) {
>
> How does the memory portion referenced by PT_LOAD program headers with
> p_vaddr == 0 looks through gdb? If we cannot access such portions,
> part not referenced by the page table CR3 has is unnecessary, isn't
> it?
The part is unnecessary if you use gdb. But it is necessary if you use crash.
Thanks
Wen Congyang
>
> Thanks.
> HATAYAMA, Daisuke
>
>
