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[Qemu-devel] [RFC][PATCH 06/14 v4] target-i386: Add API to add extra mem
From: |
Wen Congyang |
Subject: |
[Qemu-devel] [RFC][PATCH 06/14 v4] target-i386: Add API to add extra memory mapping |
Date: |
Wed, 04 Jan 2012 14:09:01 +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 |
Crash needs extra memory mapping to determine phys_base.
Signed-off-by: Wen Congyang <address@hidden>
---
cpu-all.h | 2 ++
target-i386/arch-dump.c | 43 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index ffb539c..684d7ef 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -582,10 +582,12 @@ int cpu_write_elf64_note(int fd, CPUState *env, int cpuid,
target_phys_addr_t *offset);
int cpu_write_elf32_note(int fd, CPUState *env, int cpuid,
target_phys_addr_t *offset);
+int cpu_add_extra_memory_mapping(MemoryMappingList *list);
#else
#define cpu_get_memory_mapping(list, env)
#define cpu_write_elf64_note(fd, env, cpuid, offset) ({ -1; })
#define cpu_write_elf32_note(fd, env, cpuid, offset) ({ -1; })
+#define cpu_add_extra_memory_mapping(list) ({ 0; })
#endif
#endif /* CPU_ALL_H */
diff --git a/target-i386/arch-dump.c b/target-i386/arch-dump.c
index 4c0ff77..d96f6ae 100644
--- a/target-i386/arch-dump.c
+++ b/target-i386/arch-dump.c
@@ -495,3 +495,46 @@ int cpu_write_elf32_note(int fd, CPUState *env, int cpuid,
{
return x86_write_elf32_note(fd, env, cpuid, offset);
}
+
+/* This function is copied from crash */
+static target_ulong get_phys_base_addr(CPUState *env, target_ulong *base_vaddr)
+{
+ int i;
+ target_ulong kernel_base = -1;
+ target_ulong last, mask;
+
+ for (i = 30, last = -1; (kernel_base == -1) && (i >= 20); i--) {
+ mask = ~((1LL << i) - 1);
+ *base_vaddr = env->idt.base & mask;
+ if (*base_vaddr == last) {
+ continue;
+ }
+
+ kernel_base = cpu_get_phys_page_debug(env, *base_vaddr);
+ last = *base_vaddr;
+ }
+
+ return kernel_base;
+}
+
+int cpu_add_extra_memory_mapping(MemoryMappingList *list)
+{
+#ifdef TARGET_X86_64
+ target_phys_addr_t kernel_base = -1;
+ target_ulong base_vaddr;
+ bool lma = !!(first_cpu->hflags & HF_LMA_MASK);
+
+ if (!lma) {
+ return 0;
+ }
+
+ kernel_base = get_phys_base_addr(first_cpu, &base_vaddr);
+ if (kernel_base == -1) {
+ return -1;
+ }
+
+ create_new_memory_mapping_head(list, kernel_base, base_vaddr,
+ TARGET_PAGE_SIZE);
+#endif
+ return 0;
+}
--
1.7.1
- [Qemu-devel] [RFC][PATCT 0/14 v4] dump memory when host pci device is used by guest, Wen Congyang, 2012/01/04
- [Qemu-devel] [RFC][PATCH 01/14 v4] Add API to create memory mapping list, Wen Congyang, 2012/01/04
- [Qemu-devel] [RFC][PATCH 02/14 v4] Add API to check whether a physical address is I/O address, Wen Congyang, 2012/01/04
- [Qemu-devel] [RFC][PATCH 03/14 v4] target-i386: implement cpu_get_memory_mapping(), Wen Congyang, 2012/01/04
- [Qemu-devel] [RFC][PATCH 04/14 v4] Add API to get memory mapping, Wen Congyang, 2012/01/04
- [Qemu-devel] [RFC][PATCH 05/14 v4] target-i386: Add API to write elf notes to core file, Wen Congyang, 2012/01/04
- [Qemu-devel] [RFC][PATCH 06/14 v4] target-i386: Add API to add extra memory mapping,
Wen Congyang <=
- [Qemu-devel] [RFC][PATCH 07/14 v4] target-i386: add API to get dump info, Wen Congyang, 2012/01/04
- [Qemu-devel] [RFC][PATCH 08/14 v4] introduce a new monitor command 'dump' to dump guest's memory, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 09/14 v4] run dump at the background, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 10/14 v4] support detached dump, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 11/14 v4] support to cancel the current dumping, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 12/14 v4] support to set dumping speed, Wen Congyang, 2012/01/04