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[Qemu-devel] [PATCH 10/29] target-i386: Add API to get note's size
From: |
Luiz Capitulino |
Subject: |
[Qemu-devel] [PATCH 10/29] target-i386: Add API to get note's size |
Date: |
Tue, 5 Jun 2012 14:24:49 -0300 |
From: Wen Congyang <address@hidden>
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>
Signed-off-by: Luiz Capitulino <address@hidden>
---
cpu-all.h | 6 ++++++
target-i386/arch_dump.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+)
diff --git a/cpu-all.h b/cpu-all.h
index 7e07c91..2b77f66 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -553,6 +553,7 @@ 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,
@@ -586,6 +587,11 @@ 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;
+}
--
1.7.10.2.565.gbd578b5
- [Qemu-devel] [PATCH 01/29] Add API to create memory mapping list, (continued)
- [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, 2012/06/05
- [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 <=
- [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
- [Qemu-devel] [PATCH 25/29] net: purge the monitor object from all init functions, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 22/29] qerror: introduce QERR_INVALID_OPTION_GROUP, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 24/29] qemu-config: introduce qemu_find_opts_err(), Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 29/29] Add 'query-events' command to QMP to query async events, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 28/29] qapi: convert netdev_del, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 27/29] qapi: convert netdev_add, Luiz Capitulino, 2012/06/05
- [Qemu-devel] [PATCH 15/29] qemu-option: parse_option_bool(): use error_set(), Luiz Capitulino, 2012/06/05