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[Qemu-devel] [PATCH 05/12 v15] Add API to get memory mapping
From: |
Wen Congyang |
Subject: |
[Qemu-devel] [PATCH 05/12 v15] Add API to get memory mapping |
Date: |
Mon, 07 May 2012 12:06:40 +0800 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 |
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 <address@hidden>
---
memory_mapping.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
memory_mapping.h | 15 +++++++++++++++
2 files changed, 62 insertions(+), 0 deletions(-)
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 */
--
1.7.1
- [Qemu-devel] [PATCH 00/12 v15] introducing a new, dedicated guest memory dump mechanism, Wen Congyang, 2012/05/06
- [Qemu-devel] [PATCH 01/12 v15] Add API to create memory mapping list, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 02/12 v15] Add API to check whether a physical address is I/O address, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 03/12 v15] implement cpu_get_memory_mapping(), Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 04/12 v15] Add API to check whether paging mode is enabled, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 05/12 v15] Add API to get memory mapping,
Wen Congyang <=
- [Qemu-devel] [PATCH 06/12 v15] Add API to get memory mapping without do paging, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 07/12 v15] target-i386: Add API to write elf notes to core file, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 08/12 v15] target-i386: Add API to write cpu status to core file, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 09/12 v15] target-i386: add API to get dump info, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 10/12 v15] target-i386: Add API to get note's size, Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 11/12 v15] make gdb_id() generally avialable and rename it to cpu_index(), Wen Congyang, 2012/05/07
- [Qemu-devel] [PATCH 12/12 v15] introduce a new monitor command 'dump-guest-memory' to dump guest's memory, Wen Congyang, 2012/05/07
- Re: [Qemu-devel] [PATCH 00/12 v15] introducing a new, dedicated guest memory dump mechanism, Luiz Capitulino, 2012/05/16