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?
Thanks.
HATAYAMA, Daisuke
