[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 10/12 v13] target-i386: Add API to get note's size
From: |
Wen Congyang |
Subject: |
[Qemu-devel] [PATCH 10/12 v13] target-i386: Add API to get note's size |
Date: |
Wed, 18 Apr 2012 20:57:04 +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 |
We should know where the note and memory is stored before writing
them to vmcore. If we know this, we can avoid using lseek() when
creating vmcore.
Signed-off-by: Wen Congyang <address@hidden>
---
cpu-all.h | 6 ++++++
target-i386/arch_dump.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index 1a1a06d..5c9838d 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -555,6 +555,7 @@ int cpu_write_elf64_qemunote(write_core_dump_function f,
CPUArchState *env,
int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
void *opaque);
int cpu_get_dump_info(ArchDumpInfo *info);
+size_t cpu_get_note_size(int class, int machine, int nr_cpus);
#else
static inline int cpu_write_elf64_note(write_core_dump_function f,
CPUArchState *env, int cpuid,
@@ -588,6 +589,11 @@ static inline int cpu_get_dump_info(ArchDumpInfo *info)
{
return -1;
}
+
+static inline int cpu_get_note_size(int class, int machine, int nr_cpus)
+{
+ return -1;
+}
#endif
#endif /* CPU_ALL_H */
diff --git a/target-i386/arch_dump.c b/target-i386/arch_dump.c
index e378579..135d855 100644
--- a/target-i386/arch_dump.c
+++ b/target-i386/arch_dump.c
@@ -414,3 +414,36 @@ int cpu_get_dump_info(ArchDumpInfo *info)
return 0;
}
+
+size_t cpu_get_note_size(int class, int machine, int nr_cpus)
+{
+ int name_size = 5; /* "CORE" or "QEMU" */
+ size_t elf_note_size = 0;
+ size_t qemu_note_size = 0;
+ int elf_desc_size = 0;
+ int qemu_desc_size = 0;
+ int note_head_size;
+
+ if (class == ELFCLASS32) {
+ note_head_size = sizeof(Elf32_Nhdr);
+ } else {
+ note_head_size = sizeof(Elf64_Nhdr);
+ }
+
+ if (machine == EM_386) {
+ elf_desc_size = sizeof(x86_elf_prstatus);
+ }
+#ifdef TARGET_X86_64
+ else {
+ elf_desc_size = sizeof(x86_64_elf_prstatus);
+ }
+#endif
+ qemu_desc_size = sizeof(QEMUCPUState);
+
+ elf_note_size = ((note_head_size + 3) / 4 + (name_size + 3) / 4 +
+ (elf_desc_size + 3) / 4) * 4;
+ qemu_note_size = ((note_head_size + 3) / 4 + (name_size + 3) / 4 +
+ (qemu_desc_size + 3) / 4) * 4;
+
+ return (elf_note_size + qemu_note_size) * nr_cpus;
+}
--
1.7.1
- [Qemu-devel] [PATCH 00/12 v13] introducing a new, dedicated guest memory dump mechanism, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 01/12 v13] Add API to create memory mapping list, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 02/12 v13] Add API to check whether a physical address is I/O address, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 03/12 v13] implement cpu_get_memory_mapping(), Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 04/12 v13] Add API to check whether paging mode is enabled, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 05/12 v13] Add API to get memory mapping, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 06/12 v13] Add API to get memory mapping without do paging, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 07/12 v13] target-i386: Add API to write elf notes to core file, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 08/12 v13] target-i386: Add API to write cpu status to core file, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 09/12 v13] target-i386: add API to get dump info, Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 10/12 v13] target-i386: Add API to get note's size,
Wen Congyang <=
- [Qemu-devel] [PATCH 11/12 v13] make gdb_id() generally avialable and rename it to cpu_index(), Wen Congyang, 2012/04/18
- [Qemu-devel] [PATCH 12/12 v13] introduce a new monitor command 'dump-guest-memory' to dump guest's memory, Wen Congyang, 2012/04/18
- Re: [Qemu-devel] [PATCH 00/12 v13] introducing a new, dedicated guest memory dump mechanism, Wen Congyang, 2012/04/18
- Re: [Qemu-devel] [PATCH 00/12 v13] introducing a new, dedicated guest memory dump mechanism, Wen Congyang, 2012/04/19