From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54189) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SbxVL-0001s0-9s for qemu-devel@nongnu.org; Tue, 05 Jun 2012 13:25:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SbxVG-00013B-Dr for qemu-devel@nongnu.org; Tue, 05 Jun 2012 13:25:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36104) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SbxVG-00011s-6Y for qemu-devel@nongnu.org; Tue, 05 Jun 2012 13:25:10 -0400 From: Luiz Capitulino Date: Tue, 5 Jun 2012 14:24:44 -0300 Message-Id: <1338917108-3965-6-git-send-email-lcapitulino@redhat.com> In-Reply-To: <1338917108-3965-1-git-send-email-lcapitulino@redhat.com> References: <1338917108-3965-1-git-send-email-lcapitulino@redhat.com> Subject: [Qemu-devel] [PATCH 05/29] Add API to get memory mapping List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: aliguori@us.ibm.com From: Wen Congyang Add API to get all virtual address and physical address mapping. If the guest doesn't use paging, the virtual address is equal to the phyical address. The virtual address and physical address mapping is for gdb's user, and it does not include the memory that is not referenced by the page table. So if you want to use crash to anaylze the vmcore, please do not specify -p option. the reason why the -p option is not default explicitly: guest machine in a catastrophic state can have corrupted memory, which we cannot trust. Signed-off-by: Wen Congyang Signed-off-by: Luiz Capitulino --- memory_mapping.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ memory_mapping.h | 15 +++++++++++++++ 2 files changed, 62 insertions(+) diff --git a/memory_mapping.c b/memory_mapping.c index 718f271..627397a 100644 --- a/memory_mapping.c +++ b/memory_mapping.c @@ -164,3 +164,50 @@ void memory_mapping_list_init(MemoryMappingList *list) list->last_mapping = NULL; QTAILQ_INIT(&list->head); } + +#if defined(CONFIG_HAVE_GET_MEMORY_MAPPING) + +static CPUArchState *find_paging_enabled_cpu(CPUArchState *start_cpu) +{ + CPUArchState *env; + + for (env = start_cpu; env != NULL; env = env->next_cpu) { + if (cpu_paging_enabled(env)) { + return env; + } + } + + return NULL; +} + +int qemu_get_guest_memory_mapping(MemoryMappingList *list) +{ + CPUArchState *env, *first_paging_enabled_cpu; + RAMBlock *block; + ram_addr_t offset, length; + int ret; + + first_paging_enabled_cpu = find_paging_enabled_cpu(first_cpu); + if (first_paging_enabled_cpu) { + for (env = first_paging_enabled_cpu; env != NULL; env = env->next_cpu) { + ret = cpu_get_memory_mapping(list, env); + if (ret < 0) { + return -1; + } + } + return 0; + } + + /* + * If the guest doesn't use paging, the virtual address is equal to physical + * address. + */ + QLIST_FOREACH(block, &ram_list.blocks, next) { + offset = block->offset; + length = block->length; + create_new_memory_mapping(list, offset, offset, length); + } + + return 0; +} +#endif diff --git a/memory_mapping.h b/memory_mapping.h index e486d10..7f3c256 100644 --- a/memory_mapping.h +++ b/memory_mapping.h @@ -45,6 +45,21 @@ void memory_mapping_list_free(MemoryMappingList *list); void memory_mapping_list_init(MemoryMappingList *list); +/* + * Return value: + * 0: success + * -1: failed + * -2: unsupported + */ +#if defined(CONFIG_HAVE_GET_MEMORY_MAPPING) +int qemu_get_guest_memory_mapping(MemoryMappingList *list); +#else +static inline int qemu_get_guest_memory_mapping(MemoryMappingList *list) +{ + return -2; +} +#endif + #else /* We use MemoryMappingList* in cpu-all.h */ -- 1.7.10.2.565.gbd578b5