[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 05/29] Add API to get memory mapping
From: |
Luiz Capitulino |
Subject: |
[Qemu-devel] [PATCH 05/29] Add API to get memory mapping |
Date: |
Tue, 5 Jun 2012 14:24:44 -0300 |
From: Wen Congyang <address@hidden>
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>
Signed-off-by: Luiz Capitulino <address@hidden>
---
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
- [Qemu-devel] [PULL 00/29]: QMP queue, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 01/29] Add API to create memory mapping list, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 02/29] Add API to check whether a physical address is I/O address, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 03/29] implement cpu_get_memory_mapping(), Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 05/29] Add API to get memory mapping,
Luiz Capitulino <=
- [Qemu-devel] [PATCH 04/29] Add API to check whether paging mode is enabled, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 06/29] Add API to get memory mapping without do paging, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 09/29] target-i386: add API to get dump info, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 08/29] target-i386: Add API to write cpu status to core file, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 07/29] target-i386: Add API to write elf notes to core file, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 11/29] make gdb_id() generally avialable and rename it to cpu_index(), Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 10/29] target-i386: Add API to get note's size, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 18/29] qemu-option: qemu_opts_validate(): use error_set(), Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 16/29] qemu-option: parse_option_size(): use error_set(), Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 20/29] qemu-option: introduce qemu_opt_set_err(), Luiz Capitulino, 2012/06/05